Specifications

ManualsBrandsComtech EF Data ManualsComputer equipmentSDM-650B

Part Number MN/SDM300L3.IOM Revision 0

300L

Satellite Modem

Installation and O

eration Manual

Summary of content (434 pages)

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SDM-300L3 Satellite Modem Installation and Operation Manual Part Number MN/SDM300L3.
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Errata A Comtech EF Data Documentation Update Subject: Delete Operational Shock and Survivability Shock from Specifications Date: Document: December 1, 2003 SDM-300L3 Satellite Modem Installation and Operation Manual, Rev. 0, dated August 1, 2002 MN/SDM300L3.EA0 Attach this page to page 15-3 Part Number: Collating Instructions: Comments: Delete Operational Shock and Survivability Shock from Table 15-1. This information will be incorporated into the next revision.
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Table 15-1. System Specification Summary System Specifications Operating Frequency Range Digital Interfaces (Standard) Digital Interfaces (Optional) Digital Data Rate 950-1750MHz, in100 Hz steps EIA-232, EIA-422, and V.35 G.703 2.4 kbps to 5.0 Mbps, in 1 bit/s step (refer to: Digital Data Rate paragraph) Symbol Rate Modulation/Demodulation 4.8 k symbols/s to 2.
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Errata B Comtech EF Data Documentation Update Subject: Change Output Unit Reference Date: Document: December 1, 2003 SDM-300L3 Satellite Modem Installation and Operation Manual, Rev. 0, dated August 1, 2002 MN/SDM300L3.EB0 Attach this page to page 15-4 Part Number: Collating Instructions: Comments: Change Output Unit Reference in Table 15-2. This information will be incorporated into the next revision.
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Errata C Comtech EF Data Documentation Update Subject: Changes to Table 5-8 (Viterbi Reed-Solomon Modes) Date: Document: December 1, 2003 SDM-300L3 Satellite Modem Installation and Operation Manual, Rev. 0, dated August 1, 2002 MN/SDM300L3.EC0 Attach this page to page 5-9 Part Number: Collating Instructions: Comments: The following changes provide updated information for Table 5-8. This information will be incorporated into the next revision.
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Change Specifics: 5.7 Reed-Solomon Modes Reed-Solomon polynomial is compatible with Intelsat (IESS-308, IESS-309, IESS-310, and IESS-314). Table 5-8 shows the Reed-Solomon parameter used for various configurations. Table 5-8.
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Errata D Comtech EF Data Documentation Update Subject: Changes to Figure 9-1 (SDM-300L Fault Tree) Date: Document: December 1, 2003 SDM-300L3 Satellite Modem Installation and Operation Manual, Rev. 0, dated August 1, 2002 MN/SDM300L3.ED0 Attach this page to page 9-3 Part Number: Collating Instructions: Comments: The following changes provide updated information for Figure 9-1 This information will be incorporated into the next revision.
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T X T X T X R X R X I F F A U L T F A U L T F A U L T F A U L T L E D R E L A Y L E D R E L A Y O U T P U T O F F C O M C O M E Q E Q F A U L T F A U L T L E D R E L A Y T X T X R X R X A L A R M A L A R M A L A R M A L A R M L E D R E L A Y L E D R E L A Y # 2 # 3 S P A R E R E L A Y A L A R M # 1 1 2 3 4 5 P R I M A R Y A L A R M R E L A Y 6 ** *** S E C O N D A R Y A L A R M R E L A Y 7 ** ** * I B S B A C K W A R D A L A R M ** *** D E F E R R E D T X R
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Errata E Comtech EF Data Documentation Update Subject: Changed reference specified in Output Phase Noise Date: Document: December 1, 2003 SDM-300L3 Satellite Modem Installation and Operation Manual, Rev. 0, dated August 1, 2002 MN/SDM300L3.EE0 Attach this page to page 15-4 Part Number: Collating Instructions: Comments: Changed reference specified in Output Phase Noise (Table 15-2). This information will be incorporated into the next revision.
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Table 15-1. L-Band Modulator Transmit Specifications Output Connector Frequency Stability Output Power Range Output Power Accuracy Type N Female ± 0.02 ppm Optional: ± 1.0 ppm 0 to -40 dBm in 0.1 dB steps ± 1.5 dB Output Power Stability versus Temperature ± 1.0 dB Output Power Offset Adds offset of –99.0 to +99.0 dB in 0.1 dB steps to displayed IF output power.
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Errata F Comtech EF Data Documentation Update Subject: Changes to power consumption and fusing information Date: Document: December 1, 2003 SDM-300L3 Satellite Modem Installation and Operation Manual, Rev. 0, dated August 1, 2002 MN/SDM300L3.EF0 Attach this page to page xix Part Number: Collating Instructions: Comments: The following changes provide updated information for page xix and Section 3.2.10. This information will be incorporated into the next revision.
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3.2.10 AC Power Connector A standard, detachable, non-locking, 3-prong power cord (IEC plug) supplies the Alternating Current (AC) power to the modem. Observe the following: Input Power Input Voltage Connector Type Fuse Protection 55W maximum, 40W typical without BUC power supply. 90 to 132 or 175 to 264 VAC Unit switches ranges automatically I.E.C T3.15A 20 mm type fuses Line and neutral fusing s:\tpubs\manuals\released_word\modems\sdm300l3_rev0\erratas\errata f.
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Errata G Comtech EF Data Documentation Update Subject: Changes baud rates for remote control port. Date: Document: December 1, 2003 SDM-300L3 Satellite Modem Installation and Operation Manual, Rev. 0, dated August 1, 2002 MN/SDM300L3.EG0 Attach this page to page A-1 Part Number: Collating Instructions: Comments: The following changes provide updated information for page A-1. This information will be incorporated into the next revision. Change Specifics: A.
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Errata H Comtech EF Data Documentation Update Subject: Add Burst Modulator Operation Date: Document: December 1, 2003 SDM-300L3 Satellite Modem Installation and Operation Manual, Rev. 0, dated August 1, 2002 MN/SDM300L3.EH0 Attach this page to page 1-1 Part Number: Collating Instructions: Comments: The following changes provide updated information for page 1-1. This information will be incorporated into the next revision.
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Errata J Comtech EF Data Documentation Update Subject: Added Burst Mode Rate Ranges to Data Rate Table Date: Document: December 1, 2003 SDM-300L3 Satellite Modem Installation and Operation Manual, Rev. 0, dated August 1, 2002 MN/SDM300L3.EJ0 Attach this page to page 4-9 Part Number: Collating Instructions: Comments: The following changes provide updated information for page 4-9. This information will be incorporated into the next revision.
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Errata K Comtech EF Data Documentation Update Subject: Added Burst Mode Rate Ranges to Data Rate Table Date: Document: December 1, 2003 SDM-300L3 Satellite Modem Installation and Operation Manual, Rev. 0, dated August 1, 2002 MN/SDM300L3.EK0 Attach this page to page 4-62 Part Number: Collating Instructions: Comments: The following changes provide updated information for page 4-62. This information will be incorporated into the next revision.
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Errata L Comtech EF Data Documentation Update Subject: Updated Firmware Number and Version Number Date: Document: December 1, 2003 SDM-300L3 Satellite Modem Installation and Operation Manual, Rev. 0, dated August 1, 2002 MN/SDM300L3.EL0 Attach this page to page A-1 Part Number: Collating Instructions: Comments: The following changes provide updated information for page A-1. This information will be incorporated into the next revision.
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Errata M Comtech EF Data Documentation Update Subject: Add Burst Mode Requirements Date: Document: December 1, 2003 SDM-300L3 Satellite Modem Installation and Operation Manual, Rev. 0, dated August 1, 2002 MN/SDM300L3.EM0 Attach this page to page A-5 Part Number: Collating Instructions: Comments: The following changes provide updated information for page A-5. This information will be incorporated into the next revision.
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Errata N Comtech EF Data Documentation Update Subject: Add Transmit Mode Selection Date: Document: December 1, 2003 SDM-300L3 Satellite Modem Installation and Operation Manual, Rev. 0, dated August 1, 2002 MN/SDM300L3.EN0 Attach this page to page A-15 Part Number: Collating Instructions: Comments: The following changes provide updated information for page A-15. This information will be incorporated into the next revision.
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SDM-300L3 Satellite Modem Installation and Operation Manual Comtech EF Data is an ISO 9001 Registered Company. Part Number MN/SDM300L3.IOM Revision 0 August 1, 2002 Copyright © Comtech EF Data, 2000. All rights reserved. Printed in the USA. Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, (480) 333-2200, FAX: (480) 333-2161.
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Customer Support Contact the Comtech EF Data Customer Support Department for: • Product support or training • Information on upgrading or returning a product • Reporting comments or suggestions concerning manuals A Customer Support representative may be reached at: Comtech EF Data Attention: Customer Support Department 2114 West 7th Street Tempe, Arizona 85281 USA 480.333.2200 (Main Comtech EF Data Number) 480.333.4357 (Customer Support Desk) 480.333.
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Table of Contents Customer Support.......................................................................................................................................ii CHAPTER 1. INTRODUCTION .............................................................................................1–1 1.1 Overview ...................................................................................................................................... 1–3 1.2 Options Summary .........................................
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SDM-300L3 Satellite Modem Preface Revision 0 MN/SDM300L3.IOM 2.0 INSTALLATION/ UPGRADES ......................................................................................2–1 2.1 Unpacking.................................................................................................................................... 2–1 2.2 Installation ................................................................................................................................... 2–2 2.2.
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SDM-300L3 Satellite Modem Preface 4.5 Revision 0 MN/SDM300L3.IOM Menu Tree.................................................................................................................................... 4–6 4.6 OPENING SCREEN................................................................................................................... 4–7 4.6.1 FUNCTION SELECT: CONFIGURATION........................................................................ 4–7 4.6.2 FUNCTION SELECT: MONITOR ...............
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SDM-300L3 Satellite Modem Preface 6.6.1 6.6.2 6.6.3 Revision 0 MN/SDM300L3.IOM Multiples of the Frame Length............................................................................................ 6–14 Total Buffer Length ............................................................................................................ 6–14 Converting Between Bits and Seconds ............................................................................... 6–14 CHAPTER 7. FEC AND TURBO .....................
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SDM-300L3 Satellite Modem Preface CHAPTER 11. 11.1 Revision 0 MN/SDM300L3.IOM ASYNCHRONOUS INTERFACE/AUPC .......................................................11–1 Asynchronous Interface/AUPC ............................................................................................... 11–1 11.2 AUPC ......................................................................................................................................... 11–4 11.2.1 AUPC – Between Two Modems..........................
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SDM-300L3 Satellite Modem Preface 15.5.1 15.5.2 15.5.3 15.5.4 15.5.5 15.5.6 15.5.7 15.5.8 15.5.9 15.5.10 15.5.11 15.5.12 15.5.13 15.5.14 15.5.15 15.5.16 15.5.17 15.5.18 15.5.19 15.5.20 15.5.21 15.5.22 15.5.23 15.5.24 15.5.25 Revision 0 MN/SDM300L3.IOM Digital Data Rate................................................................................................................. 15–6 Modulation and Encoding Types ........................................................................................
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SDM-300L3 Satellite Modem Preface Revision 0 MN/SDM300L3.IOM 15.8 Bit Error Rate Performance .................................................................................................. 15–22 15.8.1 Performance With Noise, Viterbi Decoder, and Closed Network .................................... 15–22 15.8.2 Performance with Noise, Viterbi Decoder, and Reed-Solomon (Optional)................... 15–22 15.8.3 Performance With BPSK and {O}QPSK BER Performance ...........................................
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SDM-300L3 Satellite Modem Preface Revision 0 MN/SDM300L3.IOM 15.14 IBS (Optional with Overhead Card) ................................................................................. 15–36 15.14.1 IBS Primary Data Interfaces ......................................................................................... 15–36 15.14.2 IBS Clock and Dejitter.................................................................................................. 15–36 15.14.3 IBS Framing...................................
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SDM-300L3 Satellite Modem Preface A.2.4 Revision 0 MN/SDM300L3.IOM End Character....................................................................................................................... A–4 A.3 Configuration Commands/Responses ...................................................................................... A–5 A.3.1 Modulator Configuration Commands .................................................................................. A–5 A.3.2 Demodulator Configuration Commands .........
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SDM-300L3 Satellite Modem Preface Revision 0 MN/SDM300L3.IOM Figure 6-5. D&I G.703 Master/Master Clocking Diagram.................................................................. 6–8 Figure 6-6. Clock Slip........................................................................................................................ 6–10 Figure 6-7. Doppler Shift ................................................................................................................... 6–11 Figure 7-1. Viterbi Decoder ...
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SDM-300L3 Satellite Modem Preface Revision 0 MN/SDM300L3.IOM Table 5-6. Asynchronous Parameter Settings ...................................................................................... 5–5 Table 5-7. EFD Closed Network Parameter Settings........................................................................... 5–7 Table 5-8. Reed-Solomon Modes ........................................................................................................ 5–9 Table 7-1. Available TPC Modes .................
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SDM-300L3 Satellite Modem Preface Revision 0 MN/SDM300L3.IOM About this Manual This manual provides installation and operation information for the Comtech EF Data SDM-300L3 satellite modem. This is a technical document intended for earth station engineers, technicians, and operators responsible for the operation and maintenance of the SDM-300L3.
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SDM-300L3 Satellite Modem Preface Revision 0 MN/SDM300L3.IOM Metric Conversion Metric conversion information is located on the inside back cover of this manual. This information is provided to assist the operator in cross-referencing English to Metric conversions. Recommended Standard Designations Recommended Standard (RS) Designations have been superseded by the new designation of the Electronic Industries Association (EIA).
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SDM-300L3 Satellite Modem Preface Revision 0 MN/SDM300L3.IOM ELECTRICAL SAFETY The SDM-300L3 Satellite Modem has been shown to comply with the following safety standard: • EN 60950: Safety of Information Technology Equipment, including electrical business machines. The equipment is rated for operation over the range 85 to 264 volts AC. It has a maximum power consumption of 60 watts. FUSES The SDM-300L3 Satellite Modem is fitted with two fuses, one each for line and neutral connections.
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SDM-300L3 Satellite Modem Preface Revision 0 MN/SDM300L3.IOM Installation The installation and connection to the line supply must be made in compliance to local or national wiring codes and regulations. The SDM-300L3 is designed for connection to a power system that has separate ground, line and neutral conductors. The equipment is not designed for connection to power system that has no direct connection to ground.
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SDM-300L3 Satellite Modem Preface Revision 0 MN/SDM300L3.IOM EMC (Electromagnetic Compatibility) In accordance with European Directive 89/336/EEC, the SDM-300L3 Satellite Modem has been shown, by independent testing, to comply with the following standards: Emissions: EN 55022 Class B - Limits and methods of measurement of radio interference characteristics of Information Technology Equipment.
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SDM-300L3 Satellite Modem Preface Revision 0 MN/SDM300L3.IOM Warranty Policy This Comtech EF Data product is warranted against defects in material and workmanship for a period of two years from the date of shipment. During the warranty period, Comtech EF Data will, at its option, repair or replace products that prove to be defective. For equipment under warranty, the customer is responsible for freight to Comtech EF Data and all related custom, taxes, tariffs, insurance, etc.
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Chapter 1. INTRODUCTION The SDM-300L3 Satellite Modem is designed to meet the requirements of the Satellite Digital Communications industry. The SDM-300L3 Satellite Modem is a high performance, full duplex modem compliant with IESS-308/309/310, FDC, and V.35 specifications, but also adds significant other features in Closed Network modes. It offers variable data rates from 2.4 kbps to 5.0 Mbps, in BPSK, QPSK, OQPSK, and 8PSK.
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SDM-300L3 Satellite Modem Introduction Revision 0 MN/SDM300L3.IOM Refer to Figure 1-1 for a system block diagram.
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SDM-300L3 Satellite Modem Introduction 1.1 Revision 0 MN/SDM300L3.IOM Overview The SDM-300L3 utilizes advanced technology and digital signal processing techniques. This design eliminates circuitry to perform modem signal processing, resulting in higher reliability. The following lists the unit's features: • • • • • • • • • • • 1.2 2.4 kbps to 5.
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SDM-300L3 Satellite Modem Introduction Option G.703 Interface. Note, For BNC or 15 pin D interface see UB-530 breakout panels. G.703/ASYNC, Closed Network only 37-Pin Female D Connector 25-Pin Female D Connector 34-Pin Female V.35 50-Pin Female D Connector for use Without Overhead card. IBS Interface IDR Interface Drop & Insert Interface Primary Power: Auto-ranging AC 85 to 264 VAC Primary Power: 48 VDC (Modem only, No BUC) ODU DC Power: 24V or 48V. Primary input = AC Only 1.3 Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Introduction 1.4 Revision 0 MN/SDM300L3.IOM FAST Accessible Options Comtech EF Data FAST system allows immediate implementation of different options through the user interface keypad. Some FAST options are available through the basic platform unit, while others require that the unit be equipped with optional hardware or that the hardware be installed in the field. Refer to Table 1-1 for a listing of possible configurations.
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SDM-300L3 Satellite Modem Introduction 1.5 Revision 0 MN/SDM300L3.IOM Compatibility The SDM-300L3 is functionally compatible with many Comtech EF Data modems. When properly configured, the unit will interoperate with the following Comtech EF Data modems: • • • • CDM-550/550T (Turbo only) CDM-600 (Open Network and Turbo only) SDM-100/100A SDM-300/300A • • SDM-650B SDM-6000 • SDM-8000 1.6 Description of the Modulator 1.6.
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SDM-300L3 Satellite Modem Introduction Revision 0 MN/SDM300L3.IOM If the modem is so equipped, the optional overhead or Reed-Solomon PCB first processes the data. The data is then sent to the scrambler for energy dispersal, and then to the differential encoder. The differential encoder is a 2-bit encoder, which allows for resolution of two of the four ambiguity states of the QPSK or OQPSK demodulator. The data is sent to the convolutional encoder for encoding the baseband data.
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SDM-300L3 Satellite Modem Introduction • • Revision 0 MN/SDM300L3.IOM QPSK (OQPSK): 4 discrete phase angles represent the 4 possible states of a symbol. 8PSK: 8 discrete phase angles represent the 8 possible states of a symbol. Note: The code rate determines the number of symbols per bit. 1.6.4 BPSK Encoding The modulator converts transmitted baseband data into a modulated BPSK carrier at 2.4 kbps to 1.25 Mbps (1/2 rate).
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SDM-300L3 Satellite Modem Introduction 1.6.6 Revision 0 MN/SDM300L3.IOM OQPSK Encoding The modulator PCB converts the transmitted baseband data into a modulated OQPSK carrier within the same parameters as QPSK. The OQPSK modulation is mainly different from QPSK by offsetting the I and Q channel modulation signals. This offset prevents the RF envelope from going through zero. Under certain conditions, this may allow less back-off in the High Power Amplifier (HPA) system.
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SDM-300L3 Satellite Modem Introduction 1.7 Revision 0 MN/SDM300L3.IOM Description of the Demodulator A block diagram of the demodulator is shown in Figure 1-2. 1.7.1 Overview The demodulator converts PSK modulated carriers within the 950 to 1750 MHz range to a demodulated baseband data stream. The converted modulation types are BPSK, QPSK, OQPSK, and 8PSK. The demodulator then performs FEC decoding on the data stream to produce the error corrected data output to the data interface.
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SDM-300L3 Satellite Modem Introduction 1.7.2 Revision 0 MN/SDM300L3.IOM Functional Description The demodulator functions as an advanced, digital, coherent-phase-lock receiver and decoder. Demodulator faults also are reported to the front panel. The demodulator consists of the following basic subsections.
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SDM-300L3 Satellite Modem Introduction Revision 0 MN/SDM300L3.IOM implemented digitally. The DDS performs the function of a VCO in an analog implementation. The recovered data and symbol clocks are then used throughout the demodulator. The soft decision mapper converts the digital I and Q data to 3-bit soft decision values. These values are then fed to the programmable vector rotation circuit, providing compatibility with spectrum reversal of the I and Q channels.
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SDM-300L3 Satellite Modem Introduction 1.8.2 Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Introduction Revision 0 MN/SDM300L3.IOM The heart of the M&C card is the Dallas 80C310 microcontroller operating at 11 MHz. This microcontroller contains 256 Kbytes of internal RAM. The ROM at U8 is 29F040 (512 Kbytes). ROM access times must be equal to or greater than 150 ns. The RAM size can be 8 or 32 Kbytes. This RAM chip is internally battery-backed and contains a real time clock used by the M&C.
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SDM-300L3 Satellite Modem Introduction 1.9 Revision 0 MN/SDM300L3.IOM Dimensional Envelope Refer to Figure 1-2 for the unit’s dimensional envelope drawing. Note: Dimensions are listed in inches and centimeters are in parentheses. 19.18 (48.72) 1.75 (4.4) 19.0 (48.26) 17.0 (43.18) 1.25 (3.2) Figure 1-4.
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2.0 INSTALLATION/ UPGRADES 2.1 Unpacking The modem and manual are packaged in pre-formed, reusable, cardboard cartons containing foam spacing for maximum shipping protection. Do not use any cutting tool that will extend more than 1 inch into the container and cause damage to the modem. CAUTION Unpack the modem: 1. 2. 3. 4. 5. 6. 7. Cut the tape at the top of the carton indicated by OPEN THIS END. Remove the cardboard/foam space covering the modem and caddypacks.
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SDM-300L3 Satellite Modem Installation/Upgrades 2.2 Revision 0 MN/SDM300L3.IOM Installation The modem arrives fully assembled from the factory. After unpacking the modem, install the modem as follows: 2.2.1 Modem Installation (Optional) Refer to Figure 2-1. Use the following mounting kit KT/6228-1.
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SDM-300L3 Satellite Modem Installation/Upgrades Revision 0 MN/SDM300L3.IOM Equipment Rack Mounting Rail * * #10 Socket head screw BRACKET BOLTS * Support Bracket * Note: Components of mounting kit KT/6228-1 IDU Figure 2-1.
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SDM-300L3 Satellite Modem Installation/Upgrades 2.3 2.3.1 Revision 0 MN/SDM300L3.IOM Software and Hardware Installation/Upgrades Overhead Interface PCB Installation The overhead interface PCB can be installed at the factory or in the field. The overhead interface PCB is required to access certain options and functionality of the modem. Observe the following: 2.3.1.1 • If the overhead interface PCB is installed at the factory, then the 50-pin interface relay card will be pre-installed or the G.
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SDM-300L3 Satellite Modem Installation/Upgrades Revision 0 MN/SDM300L3.IOM The mounting hardware must be installed to provide proper grounding between the overhead interface PCB and the main PCB. CAUTION 5. After completing the installation procedure turn on the modem. Select the desired modem option to use the overhead card. Overhead Card Figure 2-2.
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SDM-300L3 Satellite Modem Installation/Upgrades 2.3.2 Revision 0 MN/SDM300L3.IOM Reed-Solomon PCB The TX/RX Reed-Solomon PCBs are installed in the same slots as the Turbo module. Do not mix Reed-Solomon PCBs with Turbo PCB. Damage to the equipment may be the result. CAUTION 2.3.2.1 Unpacking CAUTION This equipment contains parts and assemblies sensitive to damage by ESD. Use ESD precautionary procedures when touching, removing, or inserting PCBs. 1.
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SDM-300L3 Satellite Modem Installation/Upgrades Revision 0 MN/SDM300L3.IOM 4. After completing the above installation procedure turn on the modem. If the Reed-Solomon PCB was installed properly, the Utility Interface/Interface Module menu will display “OPT:Reed-Solomon” or “OPT:DI, Reed-Solomon” (if the D&I is also installed). Reed-Solomon Cards (TX or RX in Either Slot) Figure 2-3.
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SDM-300L3 Satellite Modem Installation/Upgrades 2.3.3 Revision 0 MN/SDM300L3.IOM Turbo Codec Installation The Turbo Card is installed in the same slots as the Reed-Solomon PCBs. While the Reed-Solomon uses two cards (TX and RX), the Turbo Codec uses only a single card. DO not mix Reed-Solomon PCBs with Turbo PCs. Damage to the equipment may be the result. CAUTION 2.3.3.1 Unpacking CAUTION This equipment contains parts and assemblies sensitive to damage by ESD.
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SDM-300L3 Satellite Modem Installation/Upgrades Revision 0 MN/SDM300L3.IOM 4. If required: Reed-Solomon Removal – Remove the Reed-Solomon boards from the SIMM sockets by pushing the spring clips outward while rocking the board vertically, then lift the board out. 5. Turbo Codec Installation - Align the Turbo board with either of the SIMM sockets while holding it vertically with components toward Rear panel.
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SDM-300L3 Satellite Modem Installation/Upgrades Revision 0 MN/SDM300L3.IOM Turbo Codec Installed Figure 2-4.
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SDM-300L3 Satellite Modem Installation/Upgrades 2.4 Revision 0 MN/SDM300L3.IOM Data I/O Interface Connector (J8) Removal/Installation Note: The following procedures outline the removal and installation of the Data I/O connector (J8). These procedures are written with the assumption that the same configured connector will be reinstalled. However, the operator does have an option to install a different configured connector. Refer to Table 2-1 for a matrix explaining connector options. Table 2-1.
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SDM-300L3 Satellite Modem Installation/Upgrades Revision 0 MN/SDM300L3.IOM To install Data I/O Connector (J8), as follows: 1. (For Ribbon-Configured Connector PL/6031.) Install Data I/O connector (J8) (Figure 2-5) as follows: a. Position connector (J8) in rear panel. CAUTION Use care when connecting the data I/O connector (J8) to the PCB. Damage to the connector pins may render the data I/O connector (J8) unserviceable. Misalignment can be the result. b. Connect connector (J8) to the PCB. c.
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SDM-300L3 Satellite Modem Installation/Upgrades Revision 0 MN/SDM300L3.IOM For Ribbon-Configured Connector For 50-Pin Connector with Overhead Interface Board Figure 2-5.
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SDM-300L3 Satellite Modem Installation/Upgrades Revision 0 MN/SDM300L3.IOM 2.5 Hardware Upgrades 2.5.1 Main PCB Firmware Chips The main PCB has one field-changeable flash memory chip for the M&C firmware. If necessary, this chip can be removed and a new chip added to allow for additional options, enhancements, or repairs. See Figure 2-6 for the locations of the field-changeable chips. The bulk firmware for the FPGA downloads is stored in a non-replaceable flash memory device.
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SDM-300L3 Satellite Modem Installation/Upgrades Revision 0 MN/SDM300L3.IOM U26 U25 U7 U3 Figure 2-6. Overhead Board with Field-Changeable Chips U68 Figure 2-7.
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SDM-300L3 Satellite Modem Installation/Upgrades 2.6 Revision 0 MN/SDM300L3.IOM Flash Upgrading The SDM-300L3 eliminates the need for physically replacing EPROMs to update firmware. Instead, the SDM-300L3 modem uses ‘flash memory’ technology internally, and new firmware can be uploaded to the unit from an external PC. IMPORTANT Performing a flash upgrade erases the non-volatile RAM, which is where the modem's configuration is stored. Users shall re-enter the desired configuration parameters.
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SDM-300L3 Satellite Modem Installation/Upgrades 2.6.1 Revision 0 MN/SDM300L3.IOM Downloading Flash Updates from the Web The latest firmware releases and a free software utility are available on the Comtech EF Data web site (http://www.comtechefdata.com). This utility is designed to run under Windows 95/98 or Windows NT/2000/XP and provides all of the support required to perform a Comtech EF Data firmware reflash.
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Chapter 3. CONNECTOR PINOUTS 3.1 Connector Overview When a breakout panel, such as the UB-530, is not required, the rear panel connectors provide all necessary external connections between the modem and other equipment. Table 3-1 lists these connectors and Figure 3-1 show their locations. Notes: 1. Refer to the Comtech EF Data UB-530 Universal Breakout Panel Installation and Operation Manual for connecting the UB-300 breakout panel. 2.
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SDM-300L3 Satellite Modem Connector Pinouts Revision 0 MN/SDM300L3.IOM J8 DATA I/O J6 J9 J7 J2 J3 J4 J10 CP3 CP2 CP1 J5 G.703/ASYNC INTERFACE OPTIONAL Figure 3-1. SDM-300L3 Rear Panel Table 3-1. Modem Rear Panel Connectors Name TX/IF OUTPUT EXT REF RF IF INPUT Data/I/O (Optional) REMOTE FAULT DATA I/O (Customer-select) Ref. Desig.
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SDM-300L3 Satellite Modem Connector Pinouts Revision 0 MN/SDM300L3.IOM Note: The European EMC Directive (EN55022, EN50082-1) requires using properly shielded cables for DATA I/O. These cables must be double-shielded from end-to-end, ensuring a continuous ground shield. 3.2 Connector Description 3.2.1 Remote Connector and Pinouts (J6) The remote connector is a 9-pin subminiature female D connector (J6) located on the rear panel of the modem.
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SDM-300L3 Satellite Modem Connector Pinouts 3.2.2 Revision 0 MN/SDM300L3.IOM Fault Connector and Pinouts (J7) The fault connector provides Form C contact closures for fault reporting. The three Form C summary fault contacts, ratings 1A maximum at 24 VDC, 0.5A at 120 VAC, are Modulator, Demodulator, and Common Equipment. The fault interface connection is a 9-pin subminiature female D connector (J7) located on the rear panel of the modem.
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SDM-300L3 Satellite Modem Connector Pinouts 3.2.3 Revision 0 MN/SDM300L3.IOM Data I/O Interface Connector (J8) The Data I/O interface connector conducts data input and output signals to and from the modem, and connects to the customer’s terrestrial equipment, breakout panel, or protection switch. The modem is currently available with a choice of four Data I/O connectors, as follows: • 25-pin D connector is the standard connector shipped with a base platform modem.
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SDM-300L3 Satellite Modem Connector Pinouts Revision 0 MN/SDM300L3.IOM Table 3-4. 25-Pin D Connector Pinouts Pin # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20* 21 22 23* 24 25 EIA-422 SHLD SD-A RD-A RS-A CS-A DM-A SIGGND RR-A RT+B RR-B TT+B ST+B CS+B SD+B ST-A RD+B RT-A LL RS+B MC-A DF DM+B MC+B TT-A MF 25-Pin D Connector EIA-232 SHLD TXD RXD RTS CTS DSR SIGGND DCD V.
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SDM-300L3 Satellite Modem Connector Pinouts Revision 0 MN/SDM300L3.IOM Table 3-5. 34-Pin Winchester Connector Pinouts (V.
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SDM-300L3 Satellite Modem Connector Pinouts Revision 0 MN/SDM300L3.IOM Table 3-6. 37-Pin Connector Pinouts (Optional) Pin # 1, 19 3 4 5 6 7 8 9 11 13 16 17 20, 37 21 22 23 24 25 26 27 29 31 34 35 EIA-422/MIL-188-144 Shield MF SD-A ST-A RD-A RS-A RT-A CS-A DM-A RR-A MC-A TT-A SIGGND DF SD+B ST+B RD+B RS+B RT+B CS+B DM+B RR+B MC+B TT+B There are jumpers on the PL/6031 EIA-422 interface.
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SDM-300L3 Satellite Modem Connector Pinouts Revision 0 MN/SDM300L3.IOM Table 3-7. 50-Pin Connector Pinouts Pin # 1 2 3 4 5 IDR GND GND AGC Out EIA-422 TXOctA In EIA-422 TXOctB In 6 EIA-422 RXOctA Out 7 EIA-422 RXOctB Out 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 BWO1_C BWO2_C BWO3_C BWO4_C BWAI 1 BWAI 2 BWAI 3 BWAI 4 Demod Fault C Def Maint Alrm G.703 SDB In EIA-422 ExtClkB In G.
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SDM-300L3 Satellite Modem Connector Pinouts Revision 0 MN/SDM300L3.IOM Notes: 1. IDR configuration connector pinouts: a. Backward alarm relay contacts are named for normal no fault conditions (BWOx-C connected to BWOx-NC if no fault). b. Backward alarm inputs should be grounded or pulled logic low to clear the alarm. c. Signals MF, DF, and DMA are open-collector, high-impedance (if faulted). A backup protection switch uses MF and DF if the modem is used in a redundant system. d.
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SDM-300L3 Satellite Modem Connector Pinouts 3.2.4 Revision 0 MN/SDM300L3.IOM G.703 T1, E1/ASYNC Interface Adapter The G.703 T1, E1/ASYNC Interface Adapter has three BNC connectors and a 15-pin subminiature D connector. BNC connectors (SD (J2) and RD (J3) support the G.703 unbalanced 75Ω TX and RX data interfaces. BNC connector MC (J4) supports the 75Ω unbalanced Master Clock interface. The 15-pin D connector (J5) supports the G.
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SDM-300L3 Satellite Modem Connector Pinouts 3.2.5 Revision 0 MN/SDM300L3.IOM Auxiliary 1 Connector and Pinouts (J9) The auxiliary 1 (AUX 1) connector provides: • • • • MOD and DEMOD (TTL) faults Satellite clock Satellite I&Q Automatic Gain Control (AGC) output voltage The faults are open collector levels that indicate a modulator or demodulator failure. A logic “1” indicates the faulted condition. AGC_OUT is a programmable voltage, 0 to 10V, for a receive signal level between -25 and -60 dBm.
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SDM-300L3 Satellite Modem Connector Pinouts 3.2.6 Revision 0 MN/SDM300L3.IOM Alarms Connector and Pinouts (J10) The alarm connector provides Form C contact closures for alarm reporting. The two Form C summary fault contacts are Modulator and Demodulator. The alarm connection is a 9-pin female D connector (J10) located on the rear panel of the modem. Screw locks are provided for mechanical security on the mating connector. Refer to Table 3-9 for pinout information. Table 3-9.
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SDM-300L3 Satellite Modem Connector Pinouts 3.2.10 Revision 0 MN/SDM300L3.IOM AC Power Connector A standard, detachable, non-locking, 3-prong power cord (IEC plug) supplies the Alternating Current (AC) power to the modem. Observe the following: Input Power Input Voltage Connector Type Fuse Protection 3.2.11 55W maximum, 40W typical 90 to 132 or 175 to 264 VAC Unit switches ranges automatically I.E.
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Chapter 4. FRONT PANEL OPERATION 4.1 Front Panel The modem front panel (Figure 4-1) enables control of modem configuration parameters and displays the modem status. Figure 4-1.
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SDM-300L3 Satellite Modem Front Panel Operation 4.2 Revision 0 MN/SDM300L3.IOM LED Indicators The 10 LEDs on the front panel indicate: • General modem summary faults • Status • Alarms The indicators are defined in Table 4-1 as follows: Table 4-1. LED Indicators Name LED Transmit Receive Common Stored Red Red Red Yellow Power On Transmitter On Green Green Carrier Detect Test Mode Green Yellow Transmit Receive Yellow Yellow Meaning Faults A fault condition exists in the transmit chain.
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SDM-300L3 Satellite Modem Front Panel Operation 4.3 Revision 0 MN/SDM300L3.IOM Front Panel Keypad The front panel keypad permits local operation of the modem. The keypad consists of six keys (Figure 4-2). ENTER CLEAR Figure 4-2. Keypad Each key provides one or more logical functions. These functions are defined in the following table. ENTER This key is used to select a displayed function or to execute a modem configuration change.
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SDM-300L3 Satellite Modem Front Panel Operation 4.4 Revision 0 MN/SDM300L3.IOM Menu System Note: The menus show features and options that are not available. However, they are shown to preserve the menu structure and reserve the structure for the future. This does not imply an intent or obligation to add these features or options in the future. Use the Main menu in Figure 4-3 as a quick reference for accessing the modem functions.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM Press [↑] or [↓] to change the parameters. After the display represents the correct parameters, press [ENTER] to execute the change. This action initiates the necessary programming by the modem. To undo a parameter change prior to execution, press [CLEAR]. Notes: 1. Figure 4-3 list the front panel menu window selections. 2.
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SDM-300L3 Satellite Modem Front Panel Operation 4.5 Revision 0 MN/SDM300L3.IOM Menu Tree SELECT (4.6) CONFIGURATION MONITOR FAULTS/ALARMS STORED FLTS/ALMS REMOTE AUPC UTILITY CONFIGURATION (4.6.1) MODULATOR DEMODULATOR INTERFACE LOCAL AUPC SAVE RECALL MONITOR (4.6.
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SDM-300L3 Satellite Modem Front Panel Operation 4.6 Revision 0 MN/SDM300L3.IOM OPENING SCREEN This screen is displayed whenever power is first applied to the unit. SDM-300L3 VER: X.X.X CUSTOM Press [→] key to go to the any of the following FUNCTIONAL SELECT menu screens • • • • • CONFIGURATION MONITOR FAULTS/ALARMS STORED FLTS/ALMS UTILITY Note: At any time, pressing CLEAR will return to a main heading. 4.6.
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SDM-300L3 Satellite Modem Front Panel Operation 4.6.1.1 Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: MODULATOR CONFIGURATION MODULATOR Press to review or edit the following sub-menus. FUNCTION SELECT: CONFIGURATION: MODULATOR: TX-X CODE/DATA RATE TX-A QPSK 1/2 64.000 Kbps TX-B QPSK 1/2 128.000 Kbps TX-C QPSK 1/2 256.000 Kbps TX-D QPSK 1/2 512.000 Kbps TX-V QPSK 1/2 38.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM To change the rate using the variable rate selection, press when TX-V is displayed. A flashing cursor is displayed on the first character of the coding type on line 1. Press [←] or [→] to move the flashing cursor, and [↑] or [↓] to increment or decrement the digit at the flashing cursor. Press to execute the change. Notes: 1.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: MODULATOR: TX-IF FREQUENCY (CONDITIONAL) TX-IF FREQUENCY 1200.0000 MHz Conditional: This menu is displayed when LO is programmed to 0 under Utility: Modulator: TX Terminal LO menu. IMPORTANT Programs the modulator transmit frequency between 950 and 1750 MHz, in 100 Hz steps. Upon entry, the current transmitter frequency is displayed with the flashing cursor on the first character.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: MODULATOR: TX-IF OUTPUT TX-IF OUTPUT OFF Programs the modulator output On or Off. Upon entry, the current status of the output is displayed. Press [↑] or [↓] to make the selection. Press to execute the change. FUNCTION SELECT: CONFIGURATION: MODULATOR: TX POWER LEVEL TX POWER LEVEL - 10.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: MODULATOR: SCRAMBLER SCRAMBLER ON Programs the scrambler On or Off. Upon entry, the current status of the scrambler is displayed. Press [↑] or [↓] to make the selection. Press to execute the change. FUNCTION SELECT: CONFIGURATION: MODULATOR: DIFF. ENCODER DIFF. ENCODER ON Programs the differential encoder On or Off. Upon entry, the current status of the scrambler is displayed.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: MODULATOR: CARRIER MODE CARRIER MODE NORMAL-MODULATED Programs the modem for alternate carrier modes. All modes, except Normal-Modulated are Test Modes. Four modes of operation are available: NORMAL-MODULATED This mode is normally selected. CENTER-CW Generates a CW-carrier at the current modulator frequency. This can be used to measure the output frequency.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: MODULATOR: FSK OUTPUT FSK OUTPUT OFF Note: FSK is operational only with a BUC or ODU that incorporates FSK capabilities. Programs the FSK Output On or Off. Upon entry, the current status of the FSK Output is displayed. Press [↑] or [↓] to make the selection. Press to execute the change. The modem will attempt to communiate with the ODU/BUC when the FSK is tuned On.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: MODULATOR: ODU OUTPUT DELAY ODU OUTPUT DELAY 00.00 MIN SEC Programs the ODU Output delay with 0.0 to 20.00 minutes. At power up, the M&C delays carrier turn On by the programmed time. During output delay timeout, the front panel carrier On LED flashes and the ODU output delay screen shows the remaining delay time.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: MODULATOR: RS ENCODER (CONDITIONAL) RS ENCODER OFF Conditional: Reed-Solomon option only. IMPORTANT Programs the Reed-Solomon Encoder On or Off. Upon entry, the current status of the Reed-Solomon encoder is displayed. Press [↑] or [↓] to make the selection. Press to execute the change. 4.6.1.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM RX-C QPSK 1/2 256.000 Kbps RX-D QPSK 1/2 512.000 Kbps RX-V QPSK 1/2 38.400 Kbps Upon entry, the current transmitter rate is displayed with the flashing cursor on the first character of the code rate on line 1. Line 2 displays the data rate. Press [←] or [→] to make the selection. To select the currently defined variable data rate, select RX-V, and press [ENTER] twice.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM Notes: 1. Max Symbol Rate = 2500 ksps 2. Max Data Rate for Low Var. Rate: 512 kbps. 3. OQPSK Option only: OQPSK 1/2, 3/4, and 7/8 FUNCTION SELECT: CONFIGURATION: DEMODULATOR: RX-IF FREQUENCY (CONDITIONAL) RX-IF FREQUENCY 1200.0000 MHz Conditional: This menu is displayed when LO is programmed to 0 under Utility: Demodulator: RX Terminal LO menu.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT:CONFIGURATION:DEMODULATOR: DESCRAMBLER DESCRAMBLER ON Programs the descrambler On or Off. Upon entry, the current status of the descrambler is displayed. Press [↑] or [↓] to make the selection. Press to execute the change. FUNCTION SELECT:CONFIGURATION:DEMODULATOR: DIFF. DECODER DIFF. DECODER ON Programs the differential decoder On or Off.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: DEMODULATOR: RF LOOP BACK RF LOOP BACK OFF This is a Test Mode. IMPORTANT Programs the modem for RF loopback operation. When RF loopback is turned on, the demodulator is programmed to the same frequency as the modulator. When RF loopback is turned off, the demodulator is tuned to the previous frequency. Refer to (Figure 4-4) for a block diagram of RF loopback operation.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: DEMODULATOR: IF LOOP BACK IF LOOP BACK OFF This is a Test Mode. IMPORTANT Programs the modem for IF loopback operation. When IF loopback is turned on, the demodulator input is connected to the modulator output through an internal attenuator and the modulator continues to TX a signal. The demodulator is programmed to the same frequency as the modulator.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: DEMODULATOR: BER THRESHOLD BER THRESHOLD NONE Sets the BER threshold. If the BER threshold set is exceeded, a receive fault will be indicated by the modem status indicators. BER threshold may be set from 1.0 E-3 to 1.0 E-8, or may be disabled by specifying NONE. Upon entry, the current setting of the BER threshold is displayed. Press [↑] or [↓] to select the desired setting.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: DEMODULATOR: SWEEP RANGE SWEEP RANGE 60000 Hz Programs the overall travel of the sweep width range during acquisition in the directed sweep mode. The sweep width may be set from 0 to 1,000,000 Hz. When set at 60000 Hz, the modem is in the default acquisition mode.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: DEMODULATOR: LNB POWER LNB POWER OFF Programs the LNB Power On or Off. The LNB voltage is transmitted up the center conductor of the RF-IF connector. Upon entry, the current status of the descrambler is displayed. Press [↑] or [↓] to make the selection. Press to execute the change.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: DEMODULATOR: RS DECODER RS DECODER OFF Programs the Reed-Solomon decoder On, Off, or Correction_Off. Upon entry, the current status of the Reed-Solomon decoder is displayed. Use [↑] or [↓] to select one of the following modes: ON Enables the Reed-Solomon decoder to provide data error corrections. This is the Normal operating Mode.
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SDM-300L3 Satellite Modem Front Panel Operation 4.6.1.3 Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION INTERFACE CONFIGURATION INTERFACE Press to review or edit the following sub-menus. FUNCTION SELECT: CONFIGURATION: INTERFACE: TX CLOCK SOURCE TX CLOCK SOURCE TX TERRESTRIAL Programs the clock source for the modem transmitter clock to the following configurations: TX TERRESTRIAL Sets the TX clock to recover timing from the incoming clock/data.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: INTERFACE: TX CLOCK PHASE TX CLOCK PHASE AUTO Programs the TX clock phase to AUTO, NORMAL, or INVERT. Note: AUTO is the default. Upon entry, the current setting of the TX clock phase is displayed. Press [↑] or [↓] to make the selection. When AUTO is selected, the modem will automatically select NORMAL or INVERT to properly phase the TX clock with the TX data. Press to execute the change.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: INTERFACE: BUFFER CLOCK BUFFER CLOCK RX (SATELLITE) Programs the interface buffer output clock to one of the following modes: RX (SATELLITE) Sets the output buffer clock to the satellite clock. (Bypasses the buffer.) SCT (INTERNAL) Sets the buffer clock to operate from the modem internal clock. This is also the fallback clock EXT. CLOCK Sets this clock source to the external clock.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: INTERFACE: B-BAND LOOP BACK B-BAND LOOP BACK OFF This is a Test Mode. IMPORTANT Programs the modem for baseband loopback operation. When baseband loopback is turned on, the data and timing signals are switched from the demodulator to the modulator on the modem side of the interface.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: INTERFACE: INTRFC LOOP BACK (CONDITIONAL) INTRFC LOOP BACK OFF This is a Test Mode. Conditional: This menu is only available when the overhead interface PCB or Reed-Solomon PCB is installed. IMPORTANT Programs the modem for Interface Loopback operation. When INTERFACE LOOPBACK is turned on, data is looped back at the modem side of the interface.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: INTERFACE: BUFFER SIZE (CONDITIONAL) IMPORTANT Conditional: The Bits or Milliseconds menu is displayed depending upon whether Bits or Milliseconds is selected under the Utility: Interface Buffer Program menu. BUFFER SIZE 384 BITS BUFFER SIZE 6 MILLI SECONDS Sets the size of the buffer in either Bits or Milliseconds.. Upon entry, the current buffer length is displayed.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: INTERFACE: BUFFER CENTER BUFFER CENTER YES/NO This configuration function is used to center the buffer. Choosing YES centers the buffer. Press twice to center the buffer. FUNCTION SELECT: CONFIGURATION: INTERFACE: LOOP TIMING LOOP TIMING OFF The On setting programs the transmit clocking to the RX satellite clock.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM Upon entry, the current TX data fault that is being monitored is displayed. Press [↑] or [↓] to make the selection. Press [ENTER] to execute the change. FUNCTION SELECT: CONFIGURATION: INTERFACE: RX DATA FAULT (CONDITIONAL) RX DATA FAULT NONE Conditional: This menu is only available when the overhead interface PCB is installed. IMPORTANT Receive data fault. Selects a receive interface fault monitor of NONE, AIS, or DATA.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: INTERFACE: RX 2047 PATTERN (CONDITIONAL) RX 2047 PATTERN OFF The is a Test Mode. Conditional: This menu is only available when the overhead interface PCB is installed. IMPORTANT Programs the modem to receive a 2047 pattern as the normal receive data, and allows the BER monitor to work on that 2047 pattern. Upon entry, the current status is displayed. Press [↑] or [↓] to select on or off.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: INTERFACE: RX CODING FORMAT (CONDITIONAL) RX CODING FORMAT OFF Conditional: This menu is only available when the RX G.703 interface is programmed. This requires installation of the optional Overhead Card. IMPORTANT Programs the receiver for AMI, B8ZS, or HDB3 coding. Upon entry, the current coding format is displayed. Press [↑] or [↓] to make the selection. Press to execute the change.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION:INTERFACE: DROP FORMAT (CONDITIONAL) DROP FORMAT T1 This menu is only available when the optional D&I have been selected for Modem Type in the Utility menu and the Overhead Card is installed. IMPORTANT Upon entry, the current drop data channel signal is displayed. Press [↑] or [↓] to make the selection. Press to execute the change.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: INTERFACE: INSERT FORMAT (CONDITIONAL) INSERT FORMAT T1 IMPORTANT Conditional: This menu is only available when optional D&I have been selected for Modem Type in the Utility menu and the Overhead Card is installed. Selects the desired insert data channel signaling.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: INTERFACE: DROP CHANNEL ASSIGNMENTS (CONDITIONAL) DROP CHANNEL ASSIGNMENTS IMPORTANT Conditional: This menu is only available when the optional D&I have been selected for Modem Type in the Utility menu and the Overhead Card is installed.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: INTERFACE: INSERT CHANNEL ADJUSTMENTS (CONDITIONAL) INSERT CHANNEL ASSIGNMENTS IMPORTANT Conditional: This menu is only available when the optional D&I are installed has been selected for Modem Type in the Utility menu and the Overhead Card is installed.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: INTERFACE: ASYNC TX BAUD (CONDITIONAL) ASYNC TX BAUD 110 bps Conditional: The menu is only available when Modem Type = ASYNC and requires that the Overhead Card is installed. IMPORTANT Programs the ASYNC overhead transmit baud rate for 110 to 38400 bit/s. Upon entry, the current status of the ASYNC TX baud rate is displayed.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: INTERFACE: ASYNC TX LENGTH (CONDITIONAL) ASYNC TX LENGTH 7 BITS Conditional: The menu is only available when Modem Type = ASYNC and requires that the Overhead Card is installed. IMPORTANT Programs the ASYNC overhead transmit word length for 5, 6, 7, or 8 bits. Upon entry, the current status of the ASYNC TX word length is displayed. Press [↑] or [↓] to make the selection.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: INTERFACE: ASYNC TX STOP (CONDITIONAL) ASYNC TX STOP 2 BITS Conditional: The menu is only available when Modem Type = ASYNC and requires that the Overhead Card is installed. IMPORTANT Programs the ASYNC overhead transmit stop bits for 1 or 2. Upon entry, the current status of the ASYNC TX stop bits is displayed. Press [↑] or [↓] to make the selection. Press to execute the change.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: INTERFACE: ASYNC TX PARITY (CONDITIONAL) ASYNC TX PARITY EVEN Conditional: The menu is only available when Modem Type = ASYNC and requires that the Overhead Card is installed. IMPORTANT Programs the ASYNC overhead transmit parity for Even, Odd, or None. Upon entry, the current status of the ASYNC TX parity is displayed. Press [↑] or [↓] to make the selection. Press to execute the change.
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SDM-300L3 Satellite Modem Front Panel Operation 4.6.1.4 Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: LOCAL AUPC (CONDITIONAL) CONFIGURATION LOCAL AUPC Conditional: This menu is displayed when Local Modem AUPC = ON located under the Utility: Modem Type menu. IMPORTANT The menu is available in several modes: Self-Monitoring AUPC with 1 Modem: In this mode ASYNC is not used. This does not require the Overhead card or the Reed-Solomon cards.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: LOCAL AUPC: NOMINAL POWER (CONDITIONAL) NOMINAL POWER -10.0 dBm Conditional: This menu is displayed when Local Modem AUPC = ON located under the Utility: Modem Type menu. IMPORTANT Programs the nominal power value of the AUPC. The nominal power value can range from 0 to -40 dBm, in 0.5 dBm steps. Upon entry, the current nominal power value is displayed.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: LOCAL AUPC: MAXIMUM POWER (CONDITIONAL) MAXIMUM POWER -5.0 dBm Conditional: This menu is displayed when Local Modem AUPC = ON located under the Utility: Modem Type menu. IMPORTANT Programs the maximum power level of the AUPC. The maximum power level can range from 0 to -40 dBm, in 0.5 dBm steps. FUNCTION SELECT: CONFIGURATION: LOCAL AUPC: TARGET EB/NO (CONDITIONAL) TARGET EB/NO 6.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: LOCAL AUPC: TRACKING RATE (CONDITIONAL) TRACKING RATE 5.0 dB/Min Conditional: This menu is displayed when Local Modem AUPC = ON located under the Utility: Modem Type menu. IMPORTANT Programs the maximum tracking rate of the AUPC. Maximum tracking rate can range from 0.5 to 6.0 dBm/minute, in 0.5 dBm/minute steps.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT:CONFIGURATION:LOCAL AUPC: REMOTE CL ACTION (CONDITIONAL) REMOTE CL ACTION HOLD Conditional: This menu is displayed when Local Modem AUPC = ON located under the Utility: Modem Type menu. IMPORTANT Programs the Remote Carrier Loss action (CL) for HOLD, NOMINAL, or MAXIMUM. The modulator carrier at the local end moves to this value upon carrier loss at the remote end.
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SDM-300L3 Satellite Modem Front Panel Operation 4.6.1.5 Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: CONFIGURATION: SAVE CONFIGURATION SAVE CONFIGURATION SAVE: 1, 2, 3, 4 or 5 The Configuration Save menu allows programming of configuration parameters into nonvolatile memory on the M&C. There are five memory locations that may be used to store specific configuration setups that are used frequently.
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SDM-300L3 Satellite Modem Front Panel Operation 4.6.2 Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: MONITOR FUNCTION SELECT MONITOR Press to review or edit the following sub-menus. FUNCTION SELECT: MONITOR: RAW BER RAW BER 2.4 E-3 Displays the current BER or “No Data” (if carrier is not locked). Range: < m.m E-e to > m.m E-e. Notes: 1. Low limit is based on performance. 2. High limit is based on data/code rate.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: MONITOR:EB/NO EB/NO 16.0 dB Displays the current Eb/N0 or “No Data” (if carrier is not locked). Range: 2.0 to 16.0 dB. Notes: 1. Low limit is based on the data rate. 2. High limit is 16.0 dB. Press[←] or [→] to move the flashing cursor, and [↑] or [↓] to increment or decrement the selected kbps. Press to execute the change. FUNCTION SELECT: MONITOR: RECEIVE SIGNAL RECEIVE SIGNAL -45.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: MONITOR: BUFFER FILL BUFFER FILL 50% Displays the current plesiochronous buffer fill status percent. Range: 1 to 99%. FUNCTION SELECT: MONITOR: FRAME ERRORS (CONDITIONAL) FRAME ERRORS n.n E-e 2047 ERRORS n.n E-e Conditional: This menu available only when the optional Overhead Card is installed. IMPORTANT Displays the current framing pattern bit error rate or “No Data” (if carrier is not locked).
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: MONITOR: LNB CURRENT LNB CURRENT XXX mA Monitors the LNB current or “LNB POWER OFF.” Current displayed is 0 to 500 mA in 1 mA increments. FUNCTION SELECT: MONITOR: LNB VOLTAGE LNB VOLTAGE XX VOLTS Monitors the LNB voltage or “LNB VOLTAGE OFF.” Voltage displayed is 0 to 24 VDC, in 1volt increments. FUNCTION SELECT: MONITOR: ODU CURRENT ODU CURRENT XXXX mA Monitors the ODU current or “ODU POWER OFF.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: MONITOR: ODU VOLTAGE ODU VOLTAGE XX.X VOLTS Monitors the ODU voltage or “ODU POWER OFF.” Voltage displayed is 0 to 64 volts, in 0.1 volt increments. FUNCTION SELECT: MONITOR: ODU OUTPUT LEVEL (CONDITIONAL) ODU OUTPUT LEVEL xx.xx dBm Conditional: This menu is displayed when the FSK and ODU POWER SUPPLY are On under the Configuration: Modulator menu.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: MONITOR: ODU TEMPERATURE (CONDITIONAL) ODU TEMPERATURE + XX°C/OK Conditional: This menu is displayed when FSK and ODU POWER SUPPLY are ON under the Configuration: Modulator menu. IMPORTANT Displays ODU (BUC) temperature of 00 ± 99°C of an FSK capable BUC.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: MONITOR: ODU SOFTWARE (CONDITIONAL) ODU SOFTWARE VER: XX Conditional: This menu is displayed when FSK and ODU POWER SUPPLY are ON under the Configuration: Modulator menu. IMPORTANT Displays the ODU current software version 0 to 15 of an FSK capable BUC.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: MONITOR: RX L-BAND FREQ (CONDITIONAL) RX L-Band FREQ 1200.0000 MHz IMPORTANT Conditional: This menu is displayed when the RX Terminal LO (frequency) and Mix is programmed under the Utility: Demodulator RX Terminal LO menu. Displays the TX L-Band frequency with 950 to 1750 MHz. 4.6.3 FUNCTION SELECT: FAULTS/ALARMS FUNCTION SELECT FAULTS/ALARMS Press to review or edit the following sub-menus.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: FAULTS/ALARMS: MODULATOR MODULATOR --------- IF SYNTHESIZER Modulator IF synthesizer fault. DATA CLOCK SYN I CHANNEL Transmit clock synthesizer fault. Indicates the internal Voltage Controlled Oscillator (VCO) has not locked to the incoming data clock. I channel data activity fault. Q CHANNEL Q channel data activity fault. AGC LEVEL TX IF AGC level fault. MODEM REF ACT MODEM REF activity alarm.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: FAULTS/ALARMS: TX INTERFACE TX INTERFACE -------- TX DROP Drop interface hardware fault. Typically indicates that the drop interface PLL is not locked (D&I only). (Overhead Card only.) TX DATA/AIS Data or AIS. When data fault is selected in the Interface Configuration menu, the fault indicates a data stable condition. This indicates the data is all 1s or 0s (i.e., data is not transitioning).
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: FAULTS/ALARMS: RX INTERFACE RX INTERFACE --------------- BUFFER UNDERFLOW Buffer underflow alarm. Indicates that a buffer underflow has occurred. BUFFER OVERFLOW Buffer overflow alarm. Indicates that a buffer overflow has occurred. RX DATA/AIS Data or AIS. When data fault is selected in the Configuration Interface menu the fault indicates a data stable condition.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: FAULTS/ALRMS: COMMON COMMON ------- BATTERY/CLOCK Battery or clock fault. -12V SUPPLY -12V power supply fault. +12V SUPPLY +12V power supply fault. +5V SUPPLY +5V power supply fault. SELF TEST Built in self test fault. CONTROLLER Controller fault. Typically indicates the controller has gone through a power on/off cycle. Interface module fault.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: FAULTS/ALARMS: OUTDOOR UNIT OUTDOOR UNIT ----Note: Faults are only displayed if active. Fault Active - When: ODU (BUC) Power is On and Low or/High Current Alarm set. Current Displays a current fault. Voltage Displays a voltage fault. ODU (BUC) Power is On and ODU Voltage deviates more than 20% from nominal. Temperature Displays a temperature fault. ODU (BUC) Power is On and FSK is ON.
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SDM-300L3 Satellite Modem Front Panel Operation 4.6.4 Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: STORED FLTS/ALMS FUNCTION SELECT STORED FLTS/ALMS Press to review or edit the following sub-menus. The modem stores the first 10 (Flt0 through Flt9) occurrences of fault status changes in each of the following major fault categories: Each fault status change is stored with the time and date of the occurrence of the fault.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: STORED FLTS/ALMS: COMMON COMMON X STORED TIME/DATE Displays the stored date and time of a fault or alarm, such as: • • • • • • • BATTERY/CLOCK -12 VOLT SUPPLY +12 VOLT SUPPLY +5 VOLT SUPPLY SELF TEST CONTROLLER INTERFACE MODULE FUNCTION SELECT: STORED FLTS/ALMS: BACKWARD ALRMS (CONDITIONAL) BACKWARD ALRMS X STORED TIME/DATE Conditional: Only available with IDR selected for Modem Type.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: STORED FLTS/ALMS: OUTDOOR UNIT OUTDOOR UNIT _ _ _ _ _ X Displays the stored outdoor unit fault or alarm, such as: • • • • • CURRENT VOLTAGE TEMPERATURE PLL LOCK CHECKSUM ODU POWER ON ONLY ODU POWER ON ONLY FSK ONLY FSK ONLY FSK ONLY FUNCTION SELECT: STORED FLTS/ALMS: UNAVAILABLE SECONDS (CONDITIONAL) UNAVAL SECONDS X STORED TIME/DATE Conditional: This is available only with the Reed-Solomon option.
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SDM-300L3 Satellite Modem Front Panel Operation 4.6.5 Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: REMOTE AUPC (CONDITIONAL) FUNCTION SELECT REMOTE AUPC Conditional: This menu is available when either the ASYNC or AUPC selection is made from the Modem Type menu, located under the Utility: Modem Type menu. IMPORTANT Requires either the Overhead Card installed with the ASYNC/AUPC option or the Reed-Solomon Card with AUPC option.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: REMOTE AUPC: CONFIGURATION: AUPC ENABLE (CONDITIONAL) AUPC ENABLE OFF Conditional: This menu is available when either the ASYNC or AUPC selection is made from the Modem Type menu, located under the Utility: Modem Type menu. IMPORTANT Requires either the Overhead Card installed with the ASYNC/AUPC option or the Reed-Solomon Card with AUPC option. Programs the AUPC feature On or Off at the far end of the link.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: REMOTE AUPC: CONFIGURATION: TX 2047 PATTERN (CONDITIONAL) TX 2047 PATTERN OFF Conditional: This menu is available when either the ASYNC or AUPC selection is made from the Modem Type menu, located under the Utility: Modem Type menu. IMPORTANT Requires either the Overhead Card installed with the ASYNC/AUPC option or the Reed-Solomon Card with AUPC option.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: REMOTE AUPC: CONFIGURATION: REMOTE AUPC: MONITOR: 2047 ERRORS (CONDITIONAL) 2047 ERRORS n.n E-e Conditional: This menu is available when either the ASYNC or AUPC selection is made from the Modem Type menu, located under the Utility: Modem Type menu. IMPORTANT Requires either the Overhead Card installed with the ASYNC/AUPC option or the Reed-Solomon Card with AUPC option. Receive 2047 BER.
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SDM-300L3 Satellite Modem Front Panel Operation 4.6.6 Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY FUNCTION SELECT UTILITY The Function Select: Utility menu is divided into the following categories: 4.6.6.
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SDM-300L3 Satellite Modem Front Panel Operation 4.6.6.2 Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: MODULATOR UTILITY MODULATOR Select information to view using the [←] [→] arrow keys, then press ENTER. FUNCTION SELECT: UTLITY: MODULATOR: ASSIGN TRANSMIT FILTERS Note: Alternating the setting in the following menus, changes the settings in the menus that appear under the Configuration: Modulator menus. TX-A QPSK 1/2 64.000 Kbps TX-B QPSK 1/2 128.000 Kbps TX-C QPSK 1/2 256.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM Select one of four (A, B, C, or D) pre-defined transmitter code/data rate combinations or a variable rate selection (V). Code Rate Data Rate Range Non-Turbo Requirements BPSK 1/2 2.4 to 1250 kbps {O}QPSK 1/2 4.8 to 2500 kbps {O}QPSK 3/4 7.2 to 3750 kbps QPSK 7/8 8.4 to 4375 kbps 8PSK 2/3 64.0 to 5000 kbps BPSK 1/1 4.8 to 2500 kbps {O}QPSK 1/1 9.6 to 5000 kbps Turbo Requirements BPSK 21/44 2.4 to 1193.181 kbps BPSK 5/16 2.4 to 781.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: MODULATOR: TX TERMINAL LO TX TERMINAL LO 0 MHz MIX:Valid selections entered into this menu make it possible to directly program the frequency transmitted from the satellite terminal using the Configuration: Modulator: Terminal Frequency menu. The combination of the LO and MIX determine the terminal frequency displayed.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: MODULATOR: MOD POWER OFFSET MOD POWER OFFSET + 0.0 dB Modulator power offset adjusts. Offsets the modulator output power readout in the Configuration menu. This feature does not actually change the modulator power level, but displays an offset value in the monitor. The modulator power offset range is -99.9 to +99.9 dB, in 0.1 dB steps. Note: Anything except 0.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: MODULATOR: ENCODER TYPE ENCODER TYPE VITERBI Encoder type selection. Select VITERBI, SEQUENTIAL, or TURBO encoder type. Notes: 1. A Sequential Encoder Type and a 3/4 Code Rate combination are not compatible with a CSC CLOSED Modulator Type. 2. Change only when Modem Type (under Utility: Modem Type) is EFD, ASYNC, or Custom. FUNCTION SELECT: UTILITY: MODULATOR: SCRAMBLER TYPE SCRAMBLER TYPE INTELSAT V.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: MODULATOR: TX BPSK ORDERING TX BPSK ORDERING STANDARD TX BPSK bit ordering selection. Select STANDARD or NON-STANDARD. FUNCTION SELECT: UTILITY: MODULATOR: MOD SPECTRUM MOD SPECTRUM NORMAL Programmable vector rotation allows the operator to select NORMAL or INVERT for spectrum reversal of the I and Q baseband channels.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY:MODULATOR: TX IESS-310 MODE (CONDITIONAL) TX IESS-310 MODE OFF Conditional: Only available when 8PSK option and RS option are installed and selected. IMPORTANT An On indication enables 8PSK 2/3 with Reed-Solomon. FUNCTION SELECT: UTILITY: MODULATOR: TX MODE TX MODE CONTINUOUS Selection of TX Mode IN Continuous or Burst.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: MODULATOR: ODU ALARM - HIGH ODU ALARM - HIGH 4000 mA Sets ODU Alarm – High within 0 to 4000 mA, in 1 mA steps. An alarm is produced whenever the ODU/BUC current exceeds the programmed limit. The low limit shall be less than the high limit. FUNCTION SELECT: UTILITY: MODULATOR: RF MODE CONTROL RF MODE CONTROL NORMAL This menu control several operational variations of the Transmitted (TX) L-Band.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: MODULATOR: TX SYMBOL RATE TX SYMBOL RATE 64.000 Ksps Status only: 4.800 to 2500 ksps. Provides symbol rate corresponding to the data rate, code rate(s), modulation and overhead (framing) programmed into the modulator. 4.6.6.3 FUNCTION SELECT: UTILITY: DEMODULATOR UTILITY DEMODULATOR Select information to view using the [←] [→] arrow keys, then press .
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT:UTILITY:DEMODULATOR: ASSIGN RECEIVE FILTERS Note: Alternating the setting in the following menus, changes the settings in the menus that appear under the Configuration: Demodulator menus. RX-A QPSK 1/2 64.000 Kbps RX-B QPSK 1/2 128.000 Kbps RX-C QPSK 1/2 256.000 Kbps RX-D QPSK 1/2 512.000 Kbps RX-V QPSK 1/2 38.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM Select one of four (A, B, C, or D) pre-defined receiver code/data rate combinations or a variable rate selection (V). Code Rate Data Rate Range Non-Turbo Requirements BPSK 1/2 2.4 to 1250 kbps {O}QPSK 1/2 4.8 to 2500 kbps {O}QPSK 3/4 7.2 to 3750 kbps QPSK 7/8 8.4 to 4375 kbps 8PSK 2/3 64.0 to 5000 kbps BPSK 1/1 4.8 to 2500 kbps {O}QPSK 1/1 9.6 to 5000 kbps Turbo Requirements BPSK 21/44 2.4 to 1193.181 kbps BPSK 5/16 2.4 to 781.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM RX TERMINAL LO O MHz MIX: Valid selections entered into this menu make it possible to directly program the frequency received by the satellite terminal using the Configuration: Demodulator: Terminal Frequency menu. The combination of the LO and MIX determine the terminal frequency displayed. (When the terminal frequency mode is active, the actual RX L-Band frequency is displayed under the Function Select: Monitor menu.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: DEMODULATOR: DEMODULATOR TYPE (CONDITIONAL) DEMODULATOR TYPE INTELSAT OPEN Conditional: RX FILTER TYPE is selectable only when Custom is selected for modem type in the Utility: Modem Type menu. IMPORTANT Receive filter type select. Select Type INTELSAT OPEN, EFD CLOSED, CSC CLOSED, or FDC CLOSED network receive filtering.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: DEMODULATOR: DESCRAMBLER TYPE DESCRAMBLER TYPE INTELSAT V.35 This menu is status only and displays: • With Overhead and IBS Descrambler ON: IBS SYNC • With RS Descrambler On: EFD MOD V.35 or IBS SYNC • With Turbo Descrambler On: TURBO SYNC Intelsat V.35, FDC MOD V.35, ITU V.35, or Off. Descrambler Type Intelsat V.35 FDC MOD V.35 ITU V.35 OFF IBS SYNC EF MOD V.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: DEMODULATOR: DEMOD SPECTRUM DEMOD SPECTRUM NORMAL Programmable vector rotation. Select Normal or Inverted for spectrum reversal of the I and Q baseband channels. FUNCTION SELECT: UTILITY: DEMODULATOR: RX-RS N/K DEEP (CONDITIONAL) RX-RS N/K DEEP 225/205 8 Conditional: This menu is active only when Reed-Solomon (RS) is installed and RS Option is On (under Configuration: Demodulator).
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: DEMODULATOR: LNB ALARM - LOW LNB ALARM - LOW 0 mA Status Only. Programmable within 0 to 500 mA, in 1 mA steps. An alarm is generated whenever the LNB current falls below the programmed limit. FUNCTION SELECT: UTILITY: DEMODULATOR: LNB ALARM - HIGH LNB ALARM - HIGH 500 mA Status Only. Programmable within 0 to 500 mA, in 1 mA steps.
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SDM-300L3 Satellite Modem Front Panel Operation 4.6.6.4 Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: INTERFACE UTILITY INTERFACE Select information to view using the [←] [→] arrow keys, then press ENTER. FUNCTION SELECT: UTILITY: INTERFACE: TX OVERHEAD TYPE TX OVERHEAD TYPE NONE Select None, IDR, IBS, DROP & INSERT, or ASYNC for TX overhead type. Note: Overhead types are selectable only when Custom is selected for modem type in the Utility: Modem Type menu.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: INTERFACE: TX TERR INTERFACE (CONDITIONAL) TX TERR INTERFACE RS422 Conditional: G.703 is available only when the overhead interface card is installed. IMPORTANT Displays the TX interface type EIA-232, EIA-422, V.35, or G.703. FUNCTION SELECT: UTILITY: INTERFACE: RX TERR INTERFACE (CONDITIONAL) RX TERR INTERFACE RS422 Conditional: G.703 is available only when the overhead interface card is installed.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: INTERFACE: BUFFER PROGRAM BUFFER PROGRAM BITS Allows selection of either Bits or Milliseconds for the receive buffer. • • For the modem to calculate buffer size, select Milliseconds. For a specific buffer depth, select Bits. This menu indicates whether the Bits or Milliseconds menu is displayed under Configuration: Interface Buffer Size.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: INTERFACE: FRAMING STRUCTURE: INTERFACE: FRAMING STRUCTURE: T1 FRAMING T1 FRAMING STRUCTURE: G.704 Upon entry, the framing type (T1 or E1) is displayed on Line 1. The framing structure of each type (None or G.704) is displayed on Line 2. Press [←] or [→] and [↑] or [↓] to select framing structure and type. Press to execute the change.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: INTERFACE: TX DATA PHASE TX DATA PHASE NORMAL TX data phase relationship. Use this option to select Normal or Invert for the TX data relationship to the selected TX clock. FUNCTION SELECT: UTILITY: INTERFACE: RX DATA PHASE RX DATA PHASE NORMAL RX data phase relationship. Use this option to select Normal or Invert for the RX data relationship to the selected RX clock.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT:UTILITY:INTEFACE: IDR BACKWARD ALARM CONTROL (CONDITIONAL) IDR BACKWARD ALARM CONTROL Conditional: This selection is available only when Modem Type = IDR is enabled and the Overhead card is installed. IMPORTANT Controls IDR monitor and alarm functions when not using a communications link. Use this option to select ON or OFF for the RX and TX alarms.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: INTERFACE: ASYNC TX TYPE (CONDITIONAL) ASYNC TX TYPE RS232 Conditional: This menu is available only with Modem Type = ASYNC is enabled and the Overhead card is installed. IMPORTANT Select EIA-232, EIA-485(4-WIRE), or EIA-485(2-WIRE) for ASYNC overhead type.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: INTERFACE: IDR RX ESC TYPE (CONDITIONAL) IDR RX ESC TYPE 2-32K AUDIO Conditional: This menu is available only with Modem Type = IDR is enabled and the Overhead card is installed. IMPORTANT Select 2-32K Audio or 64K Data for the IDR RX ESC type.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: INTERFACE: IBS RX ESC TYPE (CONDITIONAL) IBS RX ESC TYPE 2-32K AUDIO Conditional: This menu available only with optional Overhead card and Modem Type = IBS. IMPORTANT Select 2-32K Audio or Off for IBS RX ESC type. Selecting 2-32k audio will multiplex two 32 kbps ADPCM audio channels into 64 kbps payload data with IBS framing.
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SDM-300L3 Satellite Modem Front Panel Operation 4.6.6.5 Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: OUTDOOR UNIT (CONDITIONAL) UTILITY OUTDOOR UNIT IMPORTANT Conditional: This menu is available only when ODU Power Supply, FSK, and TX-IF Output are On. FUNCTION SELECT: UTILITY: OUTDOOR UNIT: ODU FSK ADDRESS (CONDITIONAL) ODU FSK ADDRESS 1 IMPORTANT Conditional: This menu is available only when ODU Power Supply, FSK, and TX-IF Output are On.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: OUTDOOR UNIT: ODU OUTPUT POWER (CONDITIONAL) ODU OUTPUT POWER OFF IMPORTANT Conditional: This menu is available only when ODU Power Supply, FSK, and TX-IF Output are On. Turns RF power at ODU/BUC On or Off. Select ODU Output Power On or Off. Press [↑] or [↓] to select the ODU Output Power. Press [ENTER] to execute the change.
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SDM-300L3 Satellite Modem Front Panel Operation 4.6.6.6 Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY:SYSTEM UTILITY SYSTEM Select information to view using the [←] [→] arrow keys, then press . FUNCTION SELECT: UTILITY: SYSTEM:TIME/DATE TIME: DATE: 12:00:00AM 7/04/1976 Time of day and date display/set function. The current time and date in the modem’s memory are displayed when selected. To change the modem time and/or date, press .
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: SYSTEM: REMOTE ADDRESS REMOTE ADDRESS 1 The current modem address is displayed (1 to 255). To change the remote address, press . Press [↑] or [↓] to make the selection. Press [ENTER] to execute the change. Note: Address 0 is reserved has a Global Address. FUNCTION SELECT: UTILITY: SYSTEM: REMOTE TYPE REMOTE TYPE RS485 (2-WIRE) Select EIA-485(2-Wire), EIA-485(4-Wire), or EIA-232.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: SYSTEM: YEAR DISPLAY YEAR DISPLAY 2 - DIGIT Displays the year in either 2-digits or 4-digits. To change the remote address, press . Press [↑] or [↓] to make the selection. Press to execute the change. FUNCTION SELECT: UTILITY: SYSTEM: TEST MODE STATUS TEST MODE STATUS _ _ _ _ _ _ _ _ Test mode status indicator.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: SYSTEM: SELF TEST SELF TEST OFF Select OFF, AUTO, or RUN. After completion of the test, SELF TEST (“PASSED” or “FAILED”) is displayed. • • • OFF bypasses built-in self test. AUTO initiates built-in self test when turning on modem. RUN initializes self test. FUNCTION SELECT: UTILITY: SYSTEM: DISPLAY CONTRAST DISPLAY CONTRAST LEVEL: 64 Sets the contrast setting of the Front Panel menu.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: SYSTEM: BOOT FIRMWARE BOOT FIRMWARE FW/NNNNNN-DDR Displays the M&C module firmware version. BOOT FIRMWARE MM/DD/YYYY Press to display the month, day, and year. BOOT FIRMWARE VER: x.x.x Press to display the version number. FUNCTION SELECT: UTILITY: SYSTEM: FPGA FIRMWARE FPGA FIRMWARE FW/NNNNNN-DDR Displays the FPGA module firmware version.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM Note: This menu is displayed only when the Turbo option is installed. Displays the Turbo module firmware version. FUNCTION SELECT: UTILITY: SYSTEM: DEMO MODE DEMO MODE OFF Displays the status of the Demo Mode as either On or Off. Enables all the FAST options for the hardware installed for 1 hour. FUNCTION SELECT: UTILITY: SYSTEM: EXT AGC: MAX PWR EXT AGC: MAX PWR 0.0 Volts Sets the AGC voltage for a RX signal.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: SYSTEM: MASTER RESET MASTER RESET HARD/SOFT Master reset function. CAUTION Initiating a hard reset will reset the modem and calls the default configuration settings from ROM. Initiating a soft reset will reset the modem hardware, but saves the current configuration settings. Select once to access HARD or SOFT. 1. 2. 3. 4. Press [←] or [→] to make the selection. Press .
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SDM-300L3 Satellite Modem Front Panel Operation 4.6.6.7 Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: MODEM TYPE UTILITY MODEM TYPE Select information to view using the [←] [→] arrow keys, then press . FUNCTION SELECT: UTILITY: MODEM TYPE: MODEM TYPE MODEM TYPE CUSTOM Several selections from this menu require optional hardware and software. (Also, refer to Chapter 5.) Modem Type Custom EFD IBS IDR 309 IBS VSAT IBS AUPC ASYNC D&I Description Access to all modems.
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SDM-300L3 Satellite Modem Front Panel Operation • Revision 0 MN/SDM300L3.IOM If the modem will not allow the modem type selection, that type of operation may not be an available option. Select MODEM OPTIONS and OVERHEAD OPTIONS to locate which modem operations are allowed. CAUTION Use caution when modifying the Custom Type. This type accepts all changes to the modem, including incompatible parameters changes. Only experienced modem operators familiar with all the controls shall use Custom type.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: MODEM TYPE: CARD #1 TYPE CARD #1 TYPE OVERHEAD 01 Status Only. Displays one of the following: • • OVERHEAD 01 NOT INSTALLED FUNCTION SELECT: UTILITY: MODEM TYPE: CARD #2 TYPE CARD #2 TYPE REED SOLOMON 03 Status Only.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: MODEM TYPE: CARD #3 TYPE CARD #3 TYPE REED SOLOMON 02 Status Only. Displays one of the following: • • • • REED SOLOMON 02 REED SOLOMON 03 TURBO NOT INSTALLED FUNCTION SELECT: UTILITY: MODEM TYPE: CARD #1 OPTIONS (CONDITIONAL) CARD #1 OPTIONS +++++ Status Only. Menu appears when Card #1 is installed. Displays one of the following: OVERHEAD 01 LIST: G.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: MODEM TYPE: CARD #2 OPTIONS (CONDITIONAL) CARD #2 OPTIONS + Status Only. Menu appears only when Card #2 is installed. Displays one of the following: REED SOLOMON 02 LIST: INTELSAT AUPC REED SOLOMON 03 LIST: INTELSAT AUPC TURBO LIST: AUPC (- or +) (- or +) (- or +) (- or +) (- or +) FUNCTION SELECT: UTILITY: MODEM TYPE: CARD #3 OPTIONS (CONDITIONAL) CARD #3 OPTIONS (Status Only.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: MODEM TYPE: LOCAL MODEM AUPC LOCAL MODEM AUPC OFF Selecting Local Modem AUPC = ON enables the Configuration: Local AUPC: menu where programming for self-monitoring AUPC with one modem or remote AUPC between two modems is performed. These modes automatically adjust the TX Power Level from the modulator to compensate for rain fades.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: MODEM TYPE: CARD #1 SERIAL # CARD #1 SERIAL # 012345678 Status Only. Displays the CARD #1 serial number. FUNCTION SELECT: UTILITY: MODEM TYPE: CARD #2 SERIAL # CARD #2 SERIAL # 012345678 Status Only. Displays the CARD #2 serial number. FUNCTION SELECT: UTILITY: MODEM TYPE: CARD #3 SERIAL # CARD #3 SERIAL # 012345678 Status Only. Displays the CARD #3 serial number.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: UTILITY: MODEM TYPE: CONFIGURATION CODE - MODEM CONFIGURATION CODE - MODEM Comtech EF Data-supplied code. Press 1)AAAAAAAAAA 2)AAAAAAAAAA On entry, the current configuration code is displayed with the flashing cursor on the first character. Press [←] or [→] to move the flashing cursor. Press [↑] or [↓] to increment or decrement the digit at the flashing cursor. Press to execute the change.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM On entry, the current configuration code is displayed with the flashing cursor on the first character. Press [←] or [→] to move the flashing cursor. Press [↑] or [↓] to increment or decrement the digit at the flashing cursor. Press to execute the change. Entering this code enables the corresponding modem option. To purchase an option, contact an Comtech EF Data marketing representative for more information.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM FUNCTION SELECT: MODEM TYPE: CONFIGURATION CODE – CARD #3 (CONDITIONAL) CONFIGURATION CODE – CARD #3 Comtech EF Data-supplied code. Press This menu appears only if the Overhead card is installed. IMPORTANT 1)AAAAAAAAAA 2)AAAAAAAAAA On entry, the current configuration code is displayed with the flashing cursor on the first character. Press [←] or [→] to move the flashing cursor.
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SDM-300L3 Satellite Modem Front Panel Operation 4.7 Revision 0 MN/SDM300L3.IOM SDM-300L Custom Modem Defaults Refer to Table 4-2 for custom modem defaults. Note: The following parameter do not revert to default settings after a hard reset: • • • Address/Parity/Baud Rate Remote Type EXT AGC MIN Power • • EXT AGC Max Power Display Contrast Table 4-2.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM Table 4-2. SDM-300L Custom Modem Defaults (Continued) RAW BER Corrected BER Eb/N0 Receive Signal Sweep Frequency Buffer Fill Frame Errors LNB Current LNB Voltage ODU Current 2.4 E-3 4.0 E-3 16.0 dB -45 dBm 0 Hz 50% n.
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SDM-300L3 Satellite Modem Front Panel Operation Revision 0 MN/SDM300L3.IOM Table 4-2. SDM-300L Custom Modem Defaults (Continued) Time Date Remote Baud Rate Utility Interface None E1 Insert CRC None Backward Alarm RX #X RS422 ASYNC TX Type RS422 ASYNC RX Type Bits IDR TX ESC Type T1 Framing Structure: G.704 IDR RX ESC Type E1 Framing Structure: G.
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Chapter 5. MODEM TYPE This section provides additional detail about the Modem Type setting located under the Function Select: Utility: Modem Type menu. 5.1 Modem Type This section provides additional detail information about the Modem Type setting located under the Utility: Modem Type menu. Refer to Table 5-1 for configuring the modem to the following types of operation. Each type allows the user to operate the modem under the requirements of the configuration specifications listed below. Table 5-1.
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SDM-300L3 Satellite Modem Modem Types 5.2 Revision 0 MN/SDM300L3.IOM IDR Operation To operate the modem in the IDR configuration, the following cards must be installed in the modem: • • Overhead G.703/IDR/IBS/ASYNC/AUPC/D&I card 50-pin D relay adapter card The IDR option is a FAST feature that must be enabled using the front panel and the Utility Modem Type menu. Table 5-2 lists the parameters that are accessible once the IDR modem type is enabled. Table 5-2.
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SDM-300L3 Satellite Modem Modem Types 5.3 Revision 0 MN/SDM300L3.IOM IBS Operation To operate the modem in the IBS configuration, the following cards shall be installed in the modem: • • Overhead G.703/IDR/IBS/ASYNC/AUPC/D&I card 50-pin D relay adapter card The IBS option is a FAST feature that shall be enabled using the front panel and the Utility: Modem Type menu. Table 5-3 lists the parameters that are accessible once the IBS modem type is enabled.
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SDM-300L3 Satellite Modem Modem Types 5.4 Revision 0 MN/SDM300L3.IOM D&I Operation To operate the modem in the Drop & Insert configuration, the following cards must be installed in the modem: • • Overhead G.703/IDR/IBS/ASYNC/AUPC/D&I card 50-pin D relay adapter card The D&I option is a FAST feature that must be enabled using the front panel and the Utility Modem Type menu. Table A-5 lists the parameters that are accessible once the D&I modem type is enabled. TABLE 5-4.
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SDM-300L3 Satellite Modem Modem Types 5.5 Revision 0 MN/SDM300L3.IOM ASYNC/AUPC Operation To operate in the Asynchronous/AUPC configuration, the following cards must be installed in the modem: • • Overhead G.703/IDR/IBS/ASYNC/AUPC/D&I card 50-pin D relay adapter card The ASYNC/AUPC option is a FAST feature that must be enabled using the front panel and the Utility Modem Type menu. Table A-7 lists that are accessible once the ASYNC/AUPC modem type is enabled. TABLE 5-6.
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SDM-300L3 Satellite Modem Modem Types 5.5.1 Revision 0 MN/SDM300L3.IOM AUPC Operation (with Reed-Solomon) AUPC only operation between two modems, with No ASYNC, is available with the AUPC option with Reed-Solomon cards installed. This eliminates the need for the Overhead card in applications where Closed Network operation in not required and when the ASYNC channel is not required. Setup is similar to the operation of Section 5.5, except, ASYNC parameters are not available. 5.
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SDM-300L3 Satellite Modem Modem Types Revision 0 MN/SDM300L3.IOM TABLE 5-7.
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SDM-300L3 Satellite Modem Modem Types 5.7 Revision 0 MN/SDM300L3.IOM Custom Operation Note: If the modem serves as the backup unit for a rack of modems having different hardware and FAST options, then the backup modem shall have all of the features and hardware found in the other modems. Operating in Custom mode allows access to all front panels menus, including the Utility menus. The Custom operation mode is mainly used when the modem must function with no overhead in an open network application.
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SDM-300L3 Satellite Modem Modem Types 5.8 Revision 0 MN/SDM300L3.IOM Reed-Solomon Modes Reed-Solomon polynomial is compatible with Intelsat (IESS-308, IESS-309, IESS-310, and IESS-314). Table 5-8 shows the Reed-Solomon parameter used for various configurations. Table 5-8.
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SDM-300L3 Satellite Modem Modem Types Revision 0 MN/SDM300L3.IOM Notes: 1. For IESS-308/309 compliant operation, it is necessary to enable INTELSAT OPEN under both the Utility: Modulator and Utility: Demodulator menus before selecting an open network type from the Modem Type menu under Utitlity:Modem Type. 2.
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Chapter 6. CLOCKING AND RX BUFFERING SETTINGS 6.1 Clocking Options Clocking of the data from the terrestrial equipment to the satellite (and vice versa) will depend on the application. This section describes the most common options and recommended configurations. 6.1.1 EIA-232, EIA-422, or V.35 Master/Master Refer to Figure 6-1 for: • • • • • 6.1.2 Clocking block diagram Transmit clock options Buffer clock options V.35 timing signals EIA-422 timing signals EIA-232, EIA-422, or V.
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SDM-300L3 Satellite Modem Clocking Options Revision 0 MN/SDM300L3.IOM The use of loop timing in the modem is an option for both EIA-422 and V.35 operation. SCT (LOOP): SCT (INTERNAL) clock no longer applies when the modem has loop timing on. The TX clock source is now recovered from the RX satellite data. This recovered clock is put out on the ST line and is used to clock the terrestrial equipment.
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SDM-300L3 Satellite Modem Clocking Options Revision 0 MN/SDM300L3.IOM The disadvantage of the master/slave application is that the signal received at the slave station is subject to Doppler shift. The length of the buffer at the master end will need to be twice the length that is normally required, compensating for the Doppler shift on the outward and return paths. 6.2.2 D&I G.703 Master/Master In the D&I configuration, the most typical clocking option is the master/master application.
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SDM-300L3 Satellite Modem Clocking Options Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Clocking Options Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Clocking Options Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Clocking Options Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Clocking Options Revision 0 MN/SDM300L3.IOM T X C L O C K = T X T E R R E S T R IA L DDI SD DDI SD S E N D D A TA DROP MUX CLOCK DDO DDO CLOCK RECO VERY TX TERRESTRIAL DT S IN T E R N A L O S C I L L AT O R TRANSMIT RECEIVE BO P EXTERNAL REF.
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SDM-300L3 Satellite Modem Clocking Options 6.3 Revision 0 MN/SDM300L3.IOM Buffering The purpose of a receive buffer is two reasons: • Plesiochronous buffering of two dissimilar clock frequencies (normally the far end transmit clock verses the local network clock). The clocks may be very close in frequency to each other and will normally slip at a constant rate. Figure 6-6 shows plesiochronous operation for dissimilar clocks. If incoming traffic is too fast, an occasional bit will be lost.
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SDM-300L3 Satellite Modem Clocking Options Revision 0 MN/SDM300L3.IOM PLESIOCHRONOUS OPERATION f1 f1 IS NOT EXACTLY EQUAL TO f 2 f2 2) INCOMING TRAFFIC TOO SLOW 1) INCOMING TRAFFIC TOO FAST BIT 1 BIT 1 BIT 1 ERROR BIT 2 BIT 2 BIT 3 BIT 5 BIT 2 BIT 2 BIT 3 BIT 4 BIT 1 BIT 3 BIT 3 BIT 3 BIT 5 BIT 4 BIT 4 BIT 6 BIT 6 BIT 7 BIT 5 BIT 5 BIT 7 BIT 6 INTERFACE BIT 6 INTERFACE FIGURE 6-6.
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SDM-300L3 Satellite Modem Clocking Options Revision 0 MN/SDM300L3.IOM SATELLITE MOTION AND ORBITAL INCLINATION N A GEO-SYNCHRONOUS INCLINED ORBIT GEO-SYNCHRONOUS EQUATORIAL ORBIT A SATELLITE IS MAINTAINED AT AN ASSIGNED GEOSTATIONARY LOCATION THROUGH THE USE OF GROUND COMMAND ADJUSTMENTS TO ITS N/S AND E/W LOCATION. THIS SATELLITE PROCESS, KNOWN AS SATELLITE NOMINAL STATION-KEEPING, IS USED TO KEEP POSITION THE SATELLITE DRIFT WITHIN CERTAIN BOUNDARIES.
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SDM-300L3 Satellite Modem Clocking Options 6.3.1 Revision 0 MN/SDM300L3.IOM Buffer Size The depth of the receive buffer will depend on four parameters: • • • • 6.4 Doppler shift caused by satellite Stability of each clock (plesiochronous/Doppler operation) Frame/Multiframe length of multiplexed data format Allowable time between clock slips Doppler A geostationary satellite should be positioned directly over the equator and orbit with a duration of 24 hours.
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SDM-300L3 Satellite Modem Clocking Options 6.5 Revision 0 MN/SDM300L3.IOM Plesiochronous The stability of station reference clocks is normally 1 x 10-12 (derived from a cesium standard). While the stability is exceptionally high, the two clocks are not in synchronization with each other and will eventually pass by each other. The clock used for the transmit signal is passed over the satellite, but will not be used at the receive earth station where a national network derives its time locally.
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SDM-300L3 Satellite Modem Clocking Options 6.6 Revision 0 MN/SDM300L3.IOM Frame/Multiframe Length The depth of the receive buffer required is applicable to all unframed data. When the data is framed (such as 2048 kbps G732 or 1544 kbps G733), it is desirable to provide slips in predefined locations. The advantage of organized slip locations (in relation to the frame) is that multiplexing equipment does not lose sync and outages on any channel are kept to a minimum.
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CHAPTER 7. FEC AND TURBO 7.1 Introduction The SDM-300L3 is equipped with several Forward Error Correction (FEC) encoders and decoders: • • • • • • • Viterbi Sequential Reed-Solomon (Concatenated per Intelsat) Reed-Solomon (Concatenated per Closed Network) Trellis (FAST option) Turbo Codec Uncoded The constraint lengths and encoding polynomials are not only Open Network compatible, but also are Closed Network compatible with the vast majority of existing modems.
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SDM-300L3 Satellite Modem Forward Error Correction Options 7.2 Revision 0 MN/SDM300L3.IOM Coding The SDM-300L3 can have any of the following configurations: • Basic SDM-300L (Sequential or Viterbi Decoder) • FAST options (Sequential or Viterbi Decoder) • FAST options with Reed-Solomon hardware (Sequential or Viterbi Decoder) • FAST options with Overhead hardware (Sequential or Viterbi Decoder) • Turbo hardware. 7.3 Turbo Product Codec (Hardware Option) 7.3.
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SDM-300L3 Satellite Modem Forward Error Correction Options 7.3.2 Revision 0 MN/SDM300L3.IOM Mod/Demod Processing Delay In many cases, FEC methods that provide increased coding gain do so at the expense of increased processing delay. However, with TPC, this increase in delay is very modest. Table 7-2 shows, the processing delays for the major FEC types, including the three TPC modes: Table 7-2.
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SDM-300L3 Satellite Modem Forward Error Correction Options 7.3.3 Revision 0 MN/SDM300L3.IOM Comparison of all TPC Modes Note: For additional data, refer to Appendix C, for BER specifications. Eb/No at -6 BER = 10 Eb/No at -8 BER = 10 Spectral Efficiency Symbol Rate Occupied * Bandwidth for 1 Mbps Carrier QPSK Rate 1/2 Viterbi * 6.0 dB 7.2 dB 1.00 bps/Hz 1.0 x bit rate 1190 kHz BPSK Rate 21/44 Turbo 3.0 dB 3.3 dB 0.48 bps/Hz 2.1 x bit rate 2493 kHz BPSK Rate 5/16 Turbo < 4.0 dB < 4.
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SDM-300L3 Satellite Modem Forward Error Correction Options 7.4 Revision 0 MN/SDM300L3.IOM Uncoded Operation (No FEC) There are occasions where a user may wish to operate a satellite link with no forward error correction of any kind. For this reason, the SDM-300L3 offers this uncoded mode for three modulation types - BPSK, QPSK and OQPSK. However, the user should be aware of some of the implications of using this approach. PSK demodulators have two inherent undesirable features.
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SDM-300L3 Satellite Modem Forward Error Correction Options CAUTION Revision 0 MN/SDM300L3.IOM Comtech EF Data strongly cautions users when using uncoded operation. If the acquisition sweep width exceeds one quarter of the symbol rate, there is a very high probability that the demodulator will false lock. As an example, if 64 kbps QPSK uncoded is used, the symbol rate will be half of this rate, or 32 ksymbols/second. One quarter of this equals 8 kHz.
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SDM-300L3 Satellite Modem Forward Error Correction Options Revision 0 MN/SDM300L3.IOM BPSK/OQPSK Viterbi Decoding 1.0E-02 1.0E-03 Specification Limit Rate 3/4 Coding 1.0E-04 Specification Limit Rate 1/2 Coding 1.0E-05 BER Specification Limit Rate 7/8 Coding 1.0E-06 Specification Limit 8PSK Rate 2/3 Coding 1.0E-07 1.0E-08 1.0E-09 2.0 3.0 4.0 5.0 6.0 7.0 8.0 Eb/No (dB) Figure 7-1. Viterbi Decoder 7–7 9.0 10.0 11.0 12.
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SDM-300L3 Satellite Modem Forward Error Correction Options Revision 0 MN/SDM300L3.IOM BPSK/OQPSK, Viterbi Decoder, Reed Solomon 1.0E-05 1.0E-06 BER 1.0E-07 Specification Limit Rate 8PSK 2/3 1.0E-08 Specification Limit Rate 3/4 Coding Specification Limit Rate 7/8 Coding 1.0E-09 Specification Limit Rate 1/2 Coding 1.0E-10 1.0E-11 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 Eb/No (dB) Figure 7-2. Viterbi Decoder and Reed-Solomon 7–8 11.0 12.
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SDM-300L3 Satellite Modem Forward Error Correction Options Revision 0 MN/SDM300L3.IOM UNCODED 1:1 BPSK OQPSK 1.0E-02 1.0E-03 Specification Limit Rate Uncoded 1:1 BER 1.0E-04 1.0E-05 1.0E-06 1.0E-07 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 Eb/No (dB) Figure 7-3. BPSK and (O)QPSK BER Performance 7–9 10.0 11.0 12.
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SDM-300L3 Satellite Modem Forward Error Correction Options Revision 0 MN/SDM300L3.IOM BPSK/QPSK/8PSK Turbo Product Codec 1.0E-05 1.0E-06 Specification Limit QPSK Rate 1/2 Coding Specification Limit 8PSK Rate 3/4 Coding BER 1.0E-07 1.0E-08 Specification Limit QPSK Rate 3/4 Coding 1.0E-09 Specification Limit BPSK Rate 21/44 Note: BPSK 5/16 is 1.0E-09 at 4.0 1.0E-10 2.0 3.0 4.0 5.0 6.0 7.0 8.0 Eb/No (dB) Figure 7-4. Turbo Product Codec 7–10 9.0 10.0 11.0 12.
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SDM-300L3 Satellite Modem Forward Error Correction Options Revision 0 MN/SDM300L3.IOM Sequential Decoder, Reed-Solomon 1544 Kbps 1.0E-05 1.0E-06 Specification Limit Rate 3/4 Coding 1.0E-07 BER Specification Limit Rate 1/2 Coding Specification Limit Rate 7/8 Coding 1.0E-08 1.0E-09 1.0E-10 1.0E-11 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 Eb/No (dB) Figure 7-5. Sequential Decoder, Reed-Solomon, and 1544 kbps 7–11 11.0 12.
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SDM-300L3 Satellite Modem Forward Error Correction Options Revision 0 MN/SDM300L3.IOM BPSK/OQPSK Sequential Decoder 56 Kbps 1.0E-02 1.0E-03 Specification Limit Rate 7/8 Coding 1.0E-04 Specification Limit 1.0E-05 BER Specification Limit Rate 1/2 Coding 1.0E-06 1.0E-07 1.0E-08 1.0E-09 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 Eb/No (dB) Figure 7-6. Sequential Decoder and 56 kbps 7–12 10.0 11.0 12.
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SDM-300L3 Satellite Modem Forward Error Correction Options Revision 0 MN/SDM300L3.IOM BPSK/QPSK Sequential Decoder 1544 Kbps 1.0E-02 Specification Limit Rate 7/8 Coding 1.0E-03 Specification Limit Rate 3/4 Coding 1.0E-04 1.0E-05 BER Specification Limit Rate 1/2 Coding 1.0E-06 1.0E-07 1.0E-08 1.0E-09 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 Eb/No (dB) Figure 7-7. Sequential Decoder and 1544 kbps 7–13 10.0 11.0 12.
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Chapter 8. SYSTEM CHECKOUT 8.1 System Checkout CAUTION This equipment contains parts and assemblies sensitive to damage by ESD. Use ESD precautionary procedures when touching, removing, or inserting PCBs. The modem comes equipped with an internal self-test feature. This feature is designed to provide the operator with maximum confidence that the modem is operational without installing external equipment. A 2047 pattern is generated by the modem and routed through all sections.
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SDM-300L3 Satellite Modem System Checkout Revision 0 MN/SDM300L3.IOM 8.1.1 Interface Checkout Use the following procedure and the test setup in Figure 5-1to inspect the interface. Figure 8-1. Fault Isolation Test Setup 1. Connect a BER test set to the appropriate modem data connector. 2. Set up the modem for baseband loopback operation by using the Configuration Interface front panel menu . The modem will run error free. 3.
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SDM-300L3 Satellite Modem System Checkout 8.1.2 Revision 0 MN/SDM300L3.IOM Modulator Checkout Use the following procedure to check out the modulator: 1. Set up the equipment as shown in Figure 8-1. 2. Set up the modem for operation by using the Configuration Modulator and Demodulator front panel menus. 3. Clear all TX faults by correct use of data and clock selection. 4. Measure the Eb/N0 with a receiver that is known to be properly operating.
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SDM-300L3 Satellite Modem System Checkout Revision 0 MN/SDM300L3.IOM Table 8-1. Conversion to S/N and Eb/N0 Chart (dB) (S+N)/N Code S/N Rate 1/2 Eb/N0 Code S/N Rate 3/4 Eb/N0 Code S/N Rate 7/8 Eb/N0 4.0 4.5 5.0 5.5 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 10.5 11.0 11.5 12.0 12.5 13.0 13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 17.5 18.0 18.5 19.0 19.5 20.0 1.8 2.6 3.3 4.1 4.7 5.4 6.0 6.6 7.3 7.8 8.4 9.0 9.5 10.1 10.6 11.2 11.7 12.2 12.8 13.3 13.8 14.3 14.9 15.4 15.9 16.4 16.9 17.4 17.9 18.4 18.9 19.5 20.
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SDM-300L3 Satellite Modem System Checkout Revision 0 MN/SDM300L3.IOM Figure 8-2. Typical Output Spectrum 8.1.3 Demodulator Checkout Use the following procedure to test the demodulator. 1. Set up the equipment. 2. Set up the modem with an external IF loop and level. Use a properly operating modulator, and ensure that power levels, data rates, code rates, etc., are compatible. 3. Allow the modem to lock up. Depending on the data rate and overhead type, lock up may take several seconds.
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SDM-300L3 Satellite Modem System Checkout Revision 0 MN/SDM300L3.IOM WITH NOISE WITHOUT NOISE Figure 8-3.
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Chapter 9. FAULT ISOLATION 9.1 Fault Isolation The modem’s design allows a technician to repair a faulty modem on location. CAUTION This equipment contains parts and assemblies sensitive to damage by ESD. Use ESD precautionary procedures when touching, removing, or inserting PCBs. The fault isolation procedure lists the following categories of faults or alarms.
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SDM-300L3 Satellite Modem Fault Isolation 9.1.1 Revision 0 MN/SDM300L3.IOM System Faults/Alarms System faults are reported in the “Faults/Alarms ” menu, and stored faults are reported in the “Stored Flts/Alms” menu. 9.1.2 Faults/Alarms Display General fault, status, and alarm information are indicated by 10 LEDs located on the modem’s front panel. • A fault (red LED) indicates a fault that currently exists in the modem.
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SDM-300L3 Satellite Modem Fault Isolation 9.1.3.1 Revision 0 MN/SDM300L3.IOM Faults Tree Refer to Figure 9-1 for faults monitored by the modem, and the action taken at each occurrence of that fault.
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SDM-300L3 Satellite Modem Fault Isolation Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Fault Isolation Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Fault Isolation 9.1.3.2 Revision 0 MN/SDM300L3.IOM Modulator Faults Fault/Alarm IF SYNTHESIZER Possible Problem and Action Modulator IF synthesizer fault. DATA CLOCK SYN This is considered a major alarm, and will turn off the modulator output. Return the modem for repair. Transmit data clock synthesizer fault. This fault indicates that the internal clock VCO has not locked to the incoming data clock, or the internal clock synthesizer has not locked to the internal reference.
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SDM-300L3 Satellite Modem Fault Isolation 9.1.3.3 Revision 0 MN/SDM300L3.IOM Demodulator Faults Fault/Alarm CARRIER DETECT Possible Problem and Action Carrier detect fault. Indicates the decoder is not locked. This is the most common fault displayed in the modem. Any problem from the input data on the modulator end of the circuit to the output of the decoder can cause this alarm. IF SYNTHESIZER First, ensure the demodulator has an RF input at the proper frequency and power level.
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SDM-300L3 Satellite Modem Fault Isolation 9.1.3.4 9.1.3.5 Revision 0 MN/SDM300L3.IOM Outdoor Unit Fault/Alarm CURRENT ODU Current fault. Possible Problem and Action VOLTAGE ODU Voltage fault. TEMPERATURE ODU Temperature fault. PLL LOCK PLL Lock fault. CHECKSUM Indicates the PLL is not locked to the reference of the interface transmit clock recovery oscillator. Contact the Comtech EF Data Customer Support Department. Checksum fault.
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SDM-300L3 Satellite Modem Fault Isolation 9.1.3.6 Revision 0 MN/SDM300L3.IOM Backward Alarms Faults Fault/Alarm BW ALARM RX4 BW ALARM RX3 BW ALARM RX2 BW ALARM RX1 BW ALARM TX4 BW ALARM TX3 BW ALARM TX2 BW ALARM TX1 Possible Problem and Action Receive backward alarm #4. The distant end of the link is sending backward alarm #4. This indicates trouble at the distant end, which may be a result of improper transmission at the near end of the link.
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Chapter 10. OPEN NETWORK OPERATIONS 10.1 Introduction This section summarizes the functionality and specifications of the various Open Network operating modes, such as: • • • • 10.2 IBS IDR Drop & Insert (D&I) 2xADPCM Voice in 64 kbps IBS IBS IBS operation adds a proportional overhead (1/15) to the terrestrial data. The terrestrial data and clock are passed through the baseband loopback relay and are translated from the selected baseband format to Transistor-Transistor Logic (TTL).
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SDM-300L3 Satellite Modem Open Network Operations Revision 0 MN/SDM300L3.IOM The receive data from the demodulator is input through the same interface loopback device. The receive data is demultiplexed and synchronously descrambled by the demultiplexer. The backward alarm is reported to the M&C and output by Form C relay contact. The ESC is output by an EIA-232 driver. The terrestrial data output from the demultiplexer is input to a plesiochronous buffer.
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SDM-300L3 Satellite Modem Open Network Operations Revision 0 MN/SDM300L3.IOM Figure 10-1.
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SDM-300L3 Satellite Modem Open Network Operations 10.2.1 Revision 0 MN/SDM300L3.IOM IBS Modem Defaults Table 10-1.
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SDM-300L3 Satellite Modem Open Network Operations 10.3 Revision 0 MN/SDM300L3.IOM IDR IDR operation adds 96 kbps overhead to the terrestrial data. The terrestrial data rates supported are: • • 1.544 Mbps (T1) + 96k = 1640 Mbps on the data rate menu 2.048 Mbps (E1) + 96k = 2144 Mbps on the data rate menu The terrestrial data is passed through the baseband loopback relay and is translated from the G.703 format to TTL with a recovered clock.
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SDM-300L3 Satellite Modem Open Network Operations Revision 0 MN/SDM300L3.IOM The receive data and selected clock are translated to conform to the G.703 interface, and output through the baseband loopback relay. Four sets of transmit and receive backward alarms are available to implement the structure defined in IESS-308. Backward alarms are sent to the distant side of an IDR link to signal that trouble has occurred at the receive side (which may have resulted from an improper transmission).
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SDM-300L3 Satellite Modem Open Network Operations Revision 0 MN/SDM300L3.IOM Figure 10-2.
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SDM-300L3 Satellite Modem Open Network Operations 10.3.1 Revision 0 MN/SDM300L3.IOM IDR Modem Defaults Table 10-2. IDR Modem Defaults Data Rate TX Rate A TX Rate B TX Rate C TX Rate D TX Rate V IF Frequency IF Output Mod Power Offset Power Output Scrambler Differential Encoder Modulator Type Encoder Type CW Mode Mod Power Fixed Mod Spectrum TX Clock Source Buffer Clock Source TX Clock Phase RX Clock Phase External Reference Freq.
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SDM-300L3 Satellite Modem Open Network Operations 10.4 Revision 0 MN/SDM300L3.IOM Drop & Insert (D&I) The D&I MUX works in conjunction with the interface card to enable the modem to transmit or receive fractional parts of a T1 data stream. • Refer to Figure 10-3 for a block diagram of the D&I with asynchronous overhead. The D&I option provides fully compliant baseband processing in accordance with INTELSAT IESS-308 Rev. 6 for the terrestrial information rate of 2048 kbps (E1).
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SDM-300L3 Satellite Modem Open Network Operations Revision 0 MN/SDM300L3.IOM Figure 10-3.
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SDM-300L3 Satellite Modem Open Network Operations 10.4.1 Revision 0 MN/SDM300L3.IOM Description of D&I Operation The main features of the D&I option are as follows: • • • • • 10.4.1.1 Data interface Transmit MUX Receive DEMUX ESC Backward Alarm Data Interface Data interface contains transformer-balanced data interfaces that support CCITT G.703 parameters and dejitter. This is compatible with AT&T Digital Speech Interpolation (DSI) service.
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SDM-300L3 Satellite Modem Open Network Operations Revision 0 MN/SDM300L3.IOM The transmit data will be replaced with an all 1s pattern (AIS) in the event of certain failures, in accordance with IESS-308. As a test mode, the transmit data can be replaced with a 2047 pattern. This selection overrides the AIS. Only user data bits are replaced with the pattern, while the Engineering Service Channel (ESC) (including framing and alarms) will operate normally.
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SDM-300L3 Satellite Modem Open Network Operations Revision 0 MN/SDM300L3.IOM The operator may select from four other clock sources as a backup: • • • • Insert clock (D&I mode only) RX satellite Internal clock source TX terrestrial Problems occurring on any of the selected clocks will cause the modem to substitute the satellite clock and a fault will be signaled. 10.4.1.5 Engineering Service Channel (ESC) The ESC uses certain bits of the satellite overhead to implement an EIA-232 data channel.
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SDM-300L3 Satellite Modem Open Network Operations 10.4.2 Revision 0 MN/SDM300L3.IOM D&I Framing Formats The D&I framing formats used in the modem can be divided into T1 and E1 categories, as follows: T1_ESF T1 T1_ESF_S T1_S T1_IBS E1_CCS E1_CAS E1_IBS E1_31_TS T1 Extended Super Frame T1 D4 Framing T1 Extended Super Frame Special T1 D4 Framing Special T1 IBS Non Fractional, Full 1.
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SDM-300L3 Satellite Modem Open Network Operations Revision 0 MN/SDM300L3.IOM Figure 10-4.
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SDM-300L3 Satellite Modem Open Network Operations Revision 0 MN/SDM300L3.IOM Figure 10-5.
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SDM-300L3 Satellite Modem Open Network Operations 10.4.3 Revision 0 MN/SDM300L3.IOM D&I Modem Defaults Table 10-3.
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SDM-300L3 Satellite Modem Open Network Operations 10.5 Revision 0 MN/SDM300L3.IOM 2xADPCM Voice in 64 kbps IBS 2xADPCM Voice in 64 kbps IBS operation is an optional feature available with the IBS option or the IDR option. This mode is a hybrid cross between IDR and IBS where the two 32 kbps ADPCM voice channels that are part of the IDR ESC circuits are mapped into a single 64 kbps IBS channel to provide two full-duplex voice channels.
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Chapter 11. ASYNCHRONOUS INTERFACE/AUPC 11.1 Asynchronous Interface/AUPC The asynchronous (ASYNC) interface option provides the interface for terrestrial data and a single ASYNC overhead channel. Typically used for earth-station-to-earth-station communication, the overhead channel is MUXed onto the data and transmitted at an overhead rate of 16/15 of the main channel. The AUPC feature works with the ASYNC option to allow remote communication between a local modem and a remote modem.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC Revision 0 MN/SDM300L3.IOM ASYNC overhead is a 1/15 rate overhead channel composed of the following: • • • • • Framing information EIA-232 or EIA-485 data Valid data flags AUPC information (if installed) Parity bits The rate of asynchronous data transfers may be selected by the operator, with the maximum rate available limited to 1.875% of the synchronous data rate.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC Revision 0 MN/SDM300L3.IOM G.703 EIA-422 AUPC DATA FROM M&C TERR DATA TERR CLOCK INPUT FIFO V.35 PLL TERR DATA MUX INTERFACE CNT SIGNALS INTERFACE CNT SIGNALS EIA-485 T E R R E S T R I A L ASYNC DATA TERR OVERHEAD CLOCK UART ASYNC DATA M O D U L A T O R EIA-232 M&C CONTROL AUPC DATA TO M&C G.703 EIA-422 TERR DATA TERR CLOCK BUFFER V.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC 11.2 Revision 0 MN/SDM300L3.IOM AUPC There are two modes of AUPC location: AUPC between two modems Maintains a target Eb/No programmed into the modem at each end. Self-Monitoring AUPC with one modem Maintains a target Eb/No for a modem that receives its own carrier from the satellite. The menu below is enabled by selecting Local Modem AUPC = ON, located under the Utility: Modem Type menu.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC Revision 0 MN/SDM300L3.IOM With Local AUPC On, set modems (A and B), if modem A loses carrier: 1. Modem A sets its output power (MAXIMUM, MINIMUM, OR HOLD) as specified by LOCAL CL ACTION. 2. Modem A then sends a “lost carrier” command to modem B. 3. Modem B sets its output power (MAXIMUM, MINIMUM, OR HOLD) as specified by REMOTE CL ACTION. 4. Once modem A has reacquired the carrier, it sends commands to modem B to achieve the desired Eb/N0.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC 11.2.1.1 Revision 0 MN/SDM300L3.IOM Remote AUPC This feature allows the user to monitor and control a remote modem location using the front panel or serial port of the local modem. The operator can set or reset the following commands: • • • 11.2.1.1.1 Baseband loopback TX 2047 pattern AUPC enable Remote Modem AUPC Configuration and Monitor The menu for this feature is remote AUPC, which is at the same level as the Configuration and Monitor menus.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC Revision 0 MN/SDM300L3.IOM Notes: 1. Comtech EF Data does not recommend increasing the power to the satellite without consulting with the satellite controller. 2. Be careful not to set carrier output too high when there is a loss of carrier due to severe weather and the CL loss action is set to Maximum. 3. Do not use the distant end RX signal to compensate for local rain fade unless allowances are made for a narrow window for TX level changes. 11.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC 11.3.3 Revision 0 MN/SDM300L3.IOM MUX Operation The MUX receives terrestrial and ASYNC data from the selected receivers. The terrestrial data flows into a small “First In/First Out” (FIFO) buffer. The FIFO buffer aids in the rate exchange between the terrestrial data rate and the overhead rate. The terrestrial clock or an internal clock can clock the data into the MUX.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC Revision 0 MN/SDM300L3.IOM The Doppler buffer receives data clocked by the overhead clock from the Demod and an enable line from the DEMUX. The data is stored in RAM. Four options are allowed to clock the data out of the buffer: • • • • TX RX Internal External Based on this selection, terrestrial data is clocked out of the buffer to the selected drivers and on to the end user. 11.3.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC 11.3.8 Revision 0 MN/SDM300L3.IOM Non-ASYNC Operation The ASYNC interface has pass-through capability. If ASYNC is turned off in the Configuration Interface menu, then a standard G.703, EIA-422, or V.35 interface is selected. The modem will operate as a standard G.703, EIA-422, or V.35 interface with no overhead.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC 11.4.1 Revision 0 MN/SDM300L3.IOM Valid ASYNC Baud Rates The ASYNC baud rates are limited by the terrestrial data rates. The following table shows the relationships between data and baud rates. If DR ≤ 15.999K If DR ≤ 31.999K If DR ≤ 63.999K If DR ≤ 127.999K If DR ≤ 255.999K If DR ≤ 511.999K If DR ≤ 1023.999K If DR ≤ 2047.999K If DR ≤ 2048.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC 11.4.3 Revision 0 MN/SDM300L3.IOM ASYNC Remote Operation Remote modems can be controlled over the ASYNC channel from the local (or “hub”) modem. Refer to Table 11-2 for a list of combinations: Table 11-2.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC Revision 0 MN/SDM300L3.IOM WYSE REMOTE TERMINAL (OR EQUIVALENT) V.35 DATA CONNECTOR 25-PIN ASYNC CONNECTOR LOCAL EIA-485 (4-WIRE) V.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC 11.4.3.1 Revision 0 MN/SDM300L3.IOM Configuration #1 (Local EIA-232 to Remote EIA-232) Table 11-3. Local EIA-232 to Remote EIA-232 #1. Local End Modem Settings for EIA-232 Utility Interface Menu ASYNC TX and RX Type EIA-232 Configuration Interface Menu ASYNC TX and RX Baud Rate 150 to 38400 (See A.4.6) ASYNC TX and RX Length 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits #1.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC 11.4.3.2 Revision 0 MN/SDM300L3.IOM Configuration #2 (Local EIA-232 to Remote EIA-485 [4-Wire]) Table 11-4. Local EIA-232 to Remote EIA-485 (4-Wire) #2. Local End Modem Settings for EIA-232 (4-Wire) Utility Interface Menu ASYNC TX and RX Type EIA-232 Configuration Interface Menu ASYNC TX and RX Baud Rate 150 to 38400 (See A.4.6) ASYNC TX and RX Length 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits #2.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC 11.4.3.3 Revision 0 MN/SDM300L3.IOM Configuration #3 (Local EIA-232 to Remote EIA-485 [2-Wire]) Table 11-5. Local EIA-232 to Remote EIA-485 (2-Wire) #3. Local End Modem Settings for EIA-232 Utility Interface Menu ASYNC TX and RX Type EIA-232 Configuration Interface Menu ASYNC TX and RX Baud Rate 150 to 38400 (See A.4.6) ASYNC TX and RX Length 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits #3.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC 11.4.3.4 Revision 0 MN/SDM300L3.IOM Configuration #4 (Local EIA-485 [4-Wire] to Remote EIA-232) Table 11-6. Local EIA-485 (4-Wire) to Remote EIA-232 #4. Local End Modem Settings for EIA-485 (4-Wire) Utility Interface Menu ASYNC TX and RX Type EIA-485 (4-wire) Configuration Interface Menu ASYNC TX and RX Baud Rate 110 to 38400 (See A.4.6) ASYNC TX and RX Length 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits #4.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC 11.4.3.5 Revision 0 MN/SDM300L3.IOM Configuration #5 (Local EIA-485 [4-Wire] to Remote EIA-485 [4-Wire]) Table 11-7. Local EIA-485 (4-Wire) to Remote EIA-485 (4-Wire) #5. Local End Modem Settings for EIA-485 (4-Wire) Utility Interface Menu ASYNC TX and RX Type EIA-485 (4-wire) Configuration Interface Menu ASYNC TX and RX Baud Rate 150 to 38400 (See A.4.6) ASYNC TX and RX Length 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits #5.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC 11.4.3.6 Revision 0 MN/SDM300L3.IOM Configuration #6 (Local EIA-485 [4-Wire] to Remote EIA-485 [2-Wire]) Table 11-8. Local EIA-485 (4-Wire) to Remote EIA-485 (2-Wire) #6. Local End Modem Settings for EIA-485 (4-Wire) Utility Interface Menu ASYNC TX and RX Type EIA-485 (4-wire) Configuration Interface Menu ASYNC TX and RX Baud Rate 150 to 38400 (See A.4.6) ASYNC TX and RX Length 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits #6.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC 11.4.3.7 Revision 0 MN/SDM300L3.IOM Configuration #7 (Local EIA-485 [2-Wire] to Remote EIA-232) Table 11-9. Local EIA-485 (2-Wire) to Remote EIA-232 #7. Local End Modem Settings for EIA-485 (2-Wire) Utility Interface Menu ASYNC TX and RX Type EIA-485 (2-wire) Configuration Interface Menu ASYNC TX and RX Baud Rate 150 to 38400 (See A.4.6) ASYNC TX and RX Length 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits #7.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC Revision 0 MN/SDM300L3.IOM The local end cable connects the 25-pin female ASYNC connector (on either the breakout panel or the Y cable) to the EIA-485 (2-wire) remote terminal (WYSE or laptop computer). The pinout of the local cable is listed in the following table. #7.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC 11.4.3.8 Revision 0 MN/SDM300L3.IOM Configuration #8 (Local EIA-485 [2-Wire] to Remote EIA-485 [4-Wire]) Table 11-10. Local EIA-485 (2-Wire) to Remote EIA-485 (4-Wire) #8. Local End Modem Settings for EIA-485 (2-Wire) Utility Interface MENU ASYNC TX and RX Type EIA-485 (2-wire) Configuration Interface Menu ASYNC TX and RX Baud Rate 150 to 38400 (See A.4.6) ASYNC TX and RX Length 7 bits ASYNC TX and RX Parity Even ASYNC TX Stop 2 bits #8.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC Revision 0 MN/SDM300L3.IOM The local end cable connects the 25-pin female ASYNC connector (on either the breakout panel or the Y cable) to the EIA-485 (2-wire) remote terminal (WYSE or laptop computer). The pinout of the local cable is listed in the following table. #8.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC 11.4.4 Revision 0 MN/SDM300L3.IOM ASYNC/AUPC Modem Defaults Table 11-11.
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CHAPTER 12. 12.1 ASYMMETRICAL LOOP TIMING Asymmetrical Loop Timing Asymmetrical Loop Timing is the same timing method that is designed into the SDM-650B TROJAN interfaces. Refer to Figure 12-1 and Figure 12-2 for TX and RX Asymmetrical Loop Timing block diagram. There are two advantages for using Asymmetrical Loop Timing: • Versatility: The user can select different transmit and receive data rates, yet still clock the send data with the receive satellite clock.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC Revision 0 MN/SDM300L3.IOM The transmit data is normally clocked into the modem with the Terminal Timing (TT) clock in typical EIA-422 operation. The received data is clocked out with the Receive Timing (RT) clock. The asymmetrical loop timing option allows the transmit and receive data to be clocked with the same, or a multiple of the same clock. The added benefit is that the transmit and receive data rates do not have to be the same.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC RXD RT Revision 0 MN/SDM300L3.IOM RXD RXC BUF INT SAT INT PLL DDS EXT REF TERR MC EXT TT Note: PLL will be bypassed when the RX data rate is set to the TX data rate. This will disable the Asymmetrical Mode. Figure 12-2. Receive Section of the Asymmetrical Loop Timing Block Diagram Example: Master/Slave Clocking Setup: 1. Master site has a 10 MHz clock that is needed as the clock source. 2. Unequal data rates: 4.096 Mbps and 2.
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SDM-300L3 Satellite Modem Asynchronous Interface/AUPC Revision 0 MN/SDM300L3.IOM Slave Site: 1. Set Configuration/Interface/Loop Timing to ON. 2. Set Configuration/Interface/TX Clock Source to SCT (LOOP). Or TX Terrestrial, Only if the user equipment can provide the proper slaved clock to the modem. 3. Set Configuration/Interface/Buffer Clock to RX Satellite (Buffer Bypass).
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Chapter 13. G.703 13.1 G.703 G.703 data is either in AMI, B8ZS (8 zero) suppression, or HDB3 (3 zero) suppression formats. There is not a coexisting clock that is on a separate line for G.703 data. The clock is derived from the data stream within the modem and in the user equipment. Loop timing, if desired, must occur in the customer equipment for the link to operate in Master/Slave. The modem cannot do loop timing in G.
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SDM-300L3 Satellite Modem G.703 Revision 0 MN/SDM300L3.IOM This page is intentionally left blank.
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CHAPTER 14. FULLY ACCESSIBLE SYSTEM TOPOLOGY (FAST) 14.1 FAST System Theory FAST is an enhancement feature available only in Comtech EF Data products, enabling on-location upgrade of the operating feature set—in the rack—without removing a modem from the setup. When service requirements change, the operator can upgrade the topology of the modem to meet those requirements within minutes after confirmation by Comtech EF Data.
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SDM-300L3 Satellite Modem Options 14.1.1.1 Revision 0 MN/SDM300L3.IOM Activation Procedure Obtain Modem Serial Number 1. Press [CLEAR] to return to the Main menu. 2. Use [←] and [→] to select Function Select menu. 3. Press [ENTER]. 4. Use [←] and [→] to select Utility Modem Type menu. 5. Press [ENTER]. 6. Use [←] and [→] to select Modem Serial # menu. 7. Record serial number: Select Features: 1. Use [←] and [→] to select Modem Options menu. 2. Press [ENTER]. 3.
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SDM-300L3 Satellite Modem Options Revision 0 MN/SDM300L3.IOM 5. Use [←] and [→] to select CARD #1 (Overhead Card) menu. 6. Record Card #1 serial number, if displayed: 7. Use [←] and [→] select CARD #2 (Reed-Solomon Card) menu. 8. Record Card #2 serial number, if displayed: 9. Press [CLEAR]. 10. Contact a Comtech EF Data sales representative to order features. 11. Comtech EF Data Customer Support personnel will verify the order and provide an invoice and instructions.
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SDM-300L3 Satellite Modem Options Revision 0 MN/SDM300L3.IOM Entering Access Codes from the Remote Control Port 1. Establish remote communication with the unit. Display will show REMOTE MODE (if applicable). 2. Enter the following commands as needed to enable the option related to each board: Main Board:
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CHAPTER 15 . SPECIFICATIONS 15.1 Specifications The SDM-300L3 satellite modem specifications are divided into sections as follows. • • • • • • • • Specifications Summary BER Specifications Modem Specifications Demodulator Specifications Interface Specifications Terrestrial Interface Types System Specifications BUC/FSK Communications (Refer to Chapter 16) Figure 15-1 shows a block diagram of the modem in a typical application.
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SDM-300L3 Satellite Modem Specifications (Optional) Breakout Panel UB-530 Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Specifications 15.2 Revision 0 MN/SDM300L3.IOM Specification Summary Table 15-1.
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SDM-300L3 Satellite Modem Specifications 15.3 Revision 0 MN/SDM300L3.IOM L-Band Modulator Specification Summary Table 15-2. L-Band Modulator Transmit Specifications Output Connector Frequency Stability Output Power Range Output Power Accuracy Output Power Stability versus Temperature Output Power Offset Type N Female ± 0.02 ppm Optional: ± 1.0 ppm 0 to -40 dBm in 0.1 dB steps ± 1.5 dB ± 1.0 dB Adds offset of –99.0 to +99.0 dB in 0.1 dB steps to displayed IF output power.
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SDM-300L3 Satellite Modem Specifications 15.4 Revision 0 MN/SDM300L3.IOM Demodulator Specification Summary Table 15-3.
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SDM-300L3 Satellite Modem Specifications Revision 0 MN/SDM300L3.IOM 15.5 L-Band Modulator Specifications 15.5.1 Digital Data Rate The digital data rate is selectable in 1 bit/s steps. The modem automatically calculates and sets the symbol rate. Data rates entered that exceed the data rate or symbol rate specification are rejected at entry. The symbol rate range is 4.8 to 2500 kHz. Table 15-4.
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SDM-300L3 Satellite Modem Specifications Revision 0 MN/SDM300L3.IOM Table 15-4.
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SDM-300L3 Satellite Modem Specifications 15.5.2 Revision 0 MN/SDM300L3.IOM Modulation and Encoding Types The following combinations of modulation and forward error correction encoding are available. Table 15-5.
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SDM-300L3 Satellite Modem Specifications 15.5.3 Revision 0 MN/SDM300L3.IOM Scrambling Types When scrambling is enabled, it is applied to the modulator data according to the programmed modulator type as listed in the following table. When scrambling is disabled, no scrambling is applied to the modulator data. Table 15-6. Scrambling Types Modulation Type EFD Closed, CSC Closed EFD Closed, CSC Closed, FDC Closed EFD Closed EFD Closed EFD Closed FDC Closed Intelsat Open Intelsat Open Intelsat Open 15.5.
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SDM-300L3 Satellite Modem Specifications 15.5.5 Revision 0 MN/SDM300L3.IOM Modulator Spurious Emissions Spurious emissions are measured relative to the power of an unmodulated carrier. The measurement is done with the carrier on in continuous mode and modulated by the correct data/clock signal. Spurious emissions measured in a 4 kHz bandwidth at the TX IF output are –55 dBc from 55 MHz to 2 GHz. 15.5.6 Modulator Phase Noise 1. The phase noise of the TX IF output carrier is no worse than: dBc/Hz -63.
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SDM-300L3 Satellite Modem Specifications 15.5.9 Revision 0 MN/SDM300L3.IOM Differential Encoder The differential encoder takes care of one set of ambiguities due to the error correction codes being transparent. • 15.5.10 On or off BPSK Bit Ordering The encoder has the ability to select whether I is the first bit or Q is the first bit in the symbol word grouping for compatibility with any system. For standard operation Q is the first bit. • • • 15.5.11 Interleaver (Reed-Solomon Codec) • • • • 15.5.
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SDM-300L3 Satellite Modem Specifications 15.5.16 Revision 0 MN/SDM300L3.IOM Modulator Power Offset An offset to the displayed IF output power may be entered from -99.0 to +99.0 dB, in 0.1 dB steps. 15.5.17 Modulator I / Q Imbalance • • 15.5.18 The modulator will have less than 4° RMS phase error. The modulator will have less than 0.25 dB amplitude imbalance. Modulator Output Noise Floor The Modulator Output Noise Floor shall be -130dBc/Hz (20 MHz from carrier). 15.5.
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SDM-300L3 Satellite Modem Specifications 15.5.24 Revision 0 MN/SDM300L3.IOM L-Band ODU Supply Voltage Standard configuration is without a power supply for the external ODU or outdoor unit. Two power options are available: • • 24V at 100W 48V at 150W During power up of the modem, the ODU supply voltage initially powers up in the OFF condition. During modem initialization, the ODU supply voltage is turned ON in a manner that safely limits the current going to the ODU.
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SDM-300L3 Satellite Modem Specifications Revision 0 MN/SDM300L3.IOM Using vector analysis of the constellation pattern, QPSK represents a symbol with the carrier phase angle at 45°, 135°, 225°, or 315°. The 1/2, 3/4, and 7/8 rates encoded provide the desired input/output bit rates. 15.6.2 Code Rate 1/1 1/2 3/4 Symbols/Bit 1 2 1.5 Bits/Hz 2 1 1.33 7/8 1.143 1.75 OQPSK Encoding The modulator PCB converts the transmitted baseband data into a modulated OQPSK carrier within the same parameters as QPSK.
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SDM-300L3 Satellite Modem Specifications Revision 0 MN/SDM300L3.IOM 15.7 L-Band Demodulator Specifications 15.7.1 Digital Data Rate The digital data rate is selectable in 1 bit/s steps. The modem automatically calculates and sets the symbol rate. Data rates entered that exceed the data rate or symbol rate specification are rejected at entry. The symbol rate range is 4.8 to 2500 kHz. Table 15-7.
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SDM-300L3 Satellite Modem Specifications Revision 0 MN/SDM300L3.IOM Table 15-7. Demodulator Digital Data Rate (Continued) Modulation Type BPSK 1/2 QPSK 1/2, 3/4 QPSK 1/2, 3/4 QPSK 1/2, 3/4 QPSK 3/4 QPSK 7/8 BPSK 1/2 QPSK 1/2, 3/4 QPSK 1/2, 3/4 QPSK 1/2, 3/4 QPSK 3/4 QPSK 7/8 QPSK 3/4 QPSK 3/4 Encoding Type ASYNC IBS D&I ASYNC ASYNC ASYNC ASYNC and Reed-Solomon IBS and Reed-Solomon D&I and Reed-Solomon ASYNC and Reed-Solomon ASYNC and Reed-Solomon ASYNC and Reed-Solomon IDR, T1 IDR, E1 2.
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SDM-300L3 Satellite Modem Specifications 15.7.2 Revision 0 MN/SDM300L3.IOM Demodulation and FEC Decoding Types The following combinations of demodulation and forward error correction decoding are available. Table 15-8.
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SDM-300L3 Satellite Modem Specifications 15.7.3 Revision 0 MN/SDM300L3.IOM Descrambling Types When descrambling is enabled, it is applied to the demodulator data according to the programmed demodulator type as listed in Table 15-9. When descrambling is disabled, no descrambling is applied to the demodulator data. Table 15-9.
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SDM-300L3 Satellite Modem Specifications 15.7.7 Revision 0 MN/SDM300L3.IOM Demodulator Spectrum Rotation The operator can select Normal, Inverted, or Auto-Detect of the spectrum for the Demodulator Input. 15.7.8 Receive Frequency The range of the input spectrum is from 950 to 1750 MHz, in 100 Hz steps. The actual value of offset from the programmed frequency is available to the operator on the front panel as well as the remote port. The resolution of this value is 1 Hz. Monitor accuracy is ± 0.01 PPM.
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SDM-300L3 Satellite Modem Specifications 15.7.14 Revision 0 MN/SDM300L3.IOM Receive Input Power (Composite) The modem can operate to its specified performance under all the following conditions: • • • • 15.7.15 The sum of all carriers is ≤ -5 dBm. The sum of all carriers within 10 MHz from the desired is ≤ +30 dBc. The sum of all carriers is ≤ +40 dBc with respect to the desired carrier for symbol rates ≤ 64 Ks/s.
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SDM-300L3 Satellite Modem Specifications 15.7.16 Revision 0 MN/SDM300L3.IOM Receive Input Power (Desired Carrier) The modem can meet the specified BER and automatically adjust to a receive input power. The minimum input signal level is –135 dBm + 10 log (Symbol Rate). E.g. (-98 dBm @ 4.8 Ks/s). The maximum desired input signal level is –85 dBm + 10 log (symbol rate). Monitor accuracy is ± 7.5 dB. See Figure 15-2.
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SDM-300L3 Satellite Modem Specifications Revision 0 MN/SDM300L3.IOM 15.8 Bit Error Rate Performance 15.8.1 Performance With Noise, Viterbi Decoder, and Closed Network Required Eb/No 15.8.2 BER 10-3 BPSK and {O}QPSK 1/2 Rate 3/4 Rate 7/8 Rate 3.8 4.9 6.1 2/3 8PSK - 10-4 4.6 5.7 6.9 - 10-5 5.3 6.4 7.6 - 10-6 6.0 7.2 8.3 8.7 10-7 6.6 7.9 8.9 9.5 10-8 7.2 8.5 9.6 10.2 Performance with Noise, Viterbi Decoder, and Reed-Solomon (Optional) Required Eb/No BPSK and {O}QPSK 15.8.
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SDM-300L3 Satellite Modem Specifications 15.8.4 Revision 0 MN/SDM300L3.IOM Performance with Noise Turbo Product Codec (Optional) Required Eb/No BER 10-6 10-7 10-8 10 -9 QPSK 1/2 Rate 3/4 Rate 3.0 3.9 BPSK 21/44 Rate 5/16 Rate 2.8 * 8PSK 3/4 Rate 7.0 3.2 4.1 3.1 * 7.3 3.5 4.3 3.3 * 7.6 3.8 4.8 3.7 4.0 8.0 * 5/16 BPSK included for compatibility with other equipment but implementation limitations prohibit optimum performance at low Eb/No.
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SDM-300L3 Satellite Modem Specifications 15.8.7 Revision 0 MN/SDM300L3.IOM Performance With Noise, 1544 kbps Sequential Decoder (Optional) Required Eb/No BPSK and QPSK 1/2 Rate 3/4 Rate 4.8 5.2 7/8 Rate 6.0 10-4 10-5 5.2 5.7 6.4 5.6 6.1 6.9 10-6 10-7 5.9 6.5 7.4 6.3 7.0 7.9 10-8 6.7 7.4 8.4 BER 10-3 Note: OQPSK with Sequential is not available. 15.8.8 BER Threshold 1. 2. 3. The modem will have a programmable BER threshold function.
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SDM-300L3 Satellite Modem Specifications 15.9 Revision 0 MN/SDM300L3.IOM Acquisition Time The acquisition times apply for QPSK only. Viterbi 6 dB Eb/N0 with ± 35 kHz Frequency Uncertainty Code Rate 1/2 1/2 1/2 1/2 1/2 Data Rate ≥ 9.6 < 64 kbps Tacq < 10 sec < 5 sec 95% 95% ≥ 64 < 190 kbps < 1 sec 95% ≥ 190 < 512 kbps < 10 sec 95% ≥ 512 < 1000 kbps < 2.5 sec 95% < 9.6 kbps P (t < Tacq) < 1 sec 95% ≥ 1 < 2.5 Mbps Sequential 6 dB Eb/N0 with ± 35 kHz Frequency Uncertainty 1/2 Code Rate ≥ 4.
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SDM-300L3 Satellite Modem Specifications 15.9.1 Revision 0 MN/SDM300L3.IOM Receive Carrier Acquisition Range 1. The modem will automatically lock to a correctly formatted carrier, which is within Acquisition Range of the displayed RX frequency. 2 2. The operator can adjust the acquisition range from 0 to 1 MHz, in 1 Hz steps. 3. The operator can adjust the center of the acquisition range from -500 to +500 kHz, in 1 Hz steps. 15.9.2 Receive Carrier Reacquisition 1.
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SDM-300L3 Satellite Modem Specifications Revision 0 MN/SDM300L3.IOM 15.10 Interface Specifications 15.10.1 TX Clock Switching Due to Failure of Selected Clock The modem will automatically switch the TX clock source to SCT internal on failure of terminal timing. 15.10.2 TX Clock Phase Adjustment The operator can set the TX clock phase to Normal, Inverted, or Auto Mode. 15.10.3 TX Data Phase Adjustment The operator can set the TX data phase to Normal or Inverted. 15.10.
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SDM-300L3 Satellite Modem Specifications 15.10.6 Revision 0 MN/SDM300L3.IOM Doppler/Plesiochronous Buffer Clock Source The operator from the following sources can select the Doppler/Plesiochronous buffer clock reference. • • • • 15.10.7 The RX satellite clock (Bypass Mode). The TX terrestrial clock (TT). Must be within ± 100 PPM of the nominal receive data rate.
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SDM-300L3 Satellite Modem Specifications 15.10.12 Revision 0 MN/SDM300L3.IOM Receive Doppler/Plesiochronous Buffer Size The receive Doppler buffer size can be set by the operator from: 1. 2. 3. 4. 15.10.13 Bypass. 32 to 262144 bits, in 16 bit steps for all data rates. Selectable in ms, from 1 to 99 in 1 ms steps, for data rates < 2.6 Mbps. Selectable Frame Format G.704 or None. Switch Faults • Modulator Fault • Demodulator Fault 15.11 Decoding 15.11.
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SDM-300L3 Satellite Modem Specifications Revision 0 MN/SDM300L3.IOM Using vector analysis of the constellation pattern, QPSK represents a symbol with the carrier phase angle at 45°, 135°, 225°, or 315°. The 1/2, 3/4, and 7/8 rates provide the desired input/output bit rates. Code Rate 1/1 1/2 3/4 7/8 15.11.3 Symbols/Bit 1 2 1.5 1.143 Bits/Hz 2 1 1.33 1.
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SDM-300L3 Satellite Modem Specifications 15.12 Revision 0 MN/SDM300L3.IOM Terrestrial Interface Types The following interface types are available with electrical properties indicated in the following subsections: Modem Configuration 25-pin Connector 34-pin Connector 37-pin Connector 50-pin Connector 50-pin Connector (Optional) EIA-232 EIA-422/ EIA-449 X X X X X X X V.35 Overhead X X X X X G.703: BNC-F and DB-9.DB9 for ASYNC 15.12.
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SDM-300L3 Satellite Modem Specifications 15.12.2 Revision 0 MN/SDM300L3.IOM V.35 Specification V.10, V.11 Specification, Circuit Supported Circuit Supported SD, SCT, SCTE, RD, SCR, DSR, RLSD, RTS, CTS, MC, DSR, LL Driver Amplitude (RD, SCR, SCTE, CTS, RLSD, DSR, SCTE) ± 0.5V-PK, ± 20% differential, into 100Ω Amplitude (SCT, SD, RTS, LL, MC) ± 0.2V Minimum into 100Ω 1 (True) when B positive with respect to A 0 (False) when A positive with respect to B 1 (True) when < -0.
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SDM-300L3 Satellite Modem Specifications 15.12.3 Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Specifications 15.13 Revision 0 MN/SDM300L3.IOM Asynchronous Overhead Specification (Optional) The operator can select EIA-232 or EIA-485 for both the transmit and receive asynchronous overhead data type. Primary Data Rates Supported G.703 EIA-422 V.35 EIA-232 Asynchronous ESC 1544 kbps SD, RD 2048 kbps SD, RD 9.6 kbps to 2.048 Mbps 9.6 kbps to 2.048 Mbps 9.6 kbps to 120 kbps Maximum Data Rate Channel Interface 1.
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SDM-300L3 Satellite Modem Specifications 15.13.1 Revision 0 MN/SDM300L3.IOM Asynchronous Baud Rates The operator can select the following baud rates for both the TX and RX asynchronous overhead. 15.13.2 110 150 300 2400 4800 9600 600 1200 19200 38400 Asynchronous Overhead Data Format The operator can select the following data formats for both the TX and RX asynchronous overhead. Word Length 5, 6, 7, or 8 bits 15.13.
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SDM-300L3 Satellite Modem Specifications 15.13.5 Revision 0 MN/SDM300L3.IOM Turbo AUPC Self monitoring AUPC is provided. 15.14 IBS (Optional with Overhead Card) Primary Data Rates Supported G.703 EIA-422 V.
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SDM-300L3 Satellite Modem Specifications 15.14.4 Revision 0 MN/SDM300L3.IOM IBS Engineering Service Channel Bi-directional processing of the components of the ESC channel, including the asynchronous or synchronous EIA-232 data channel, and fault/alarm indications. 15.14.5 IBS Scrambling Provides the synchronous scrambling/descrambling of the satellite-framed data specified in IESS-309. Base modem scrambling/descrambling is assumed to be disabled in this mode. 15.
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SDM-300L3 Satellite Modem Specifications 15.15.1 Revision 0 MN/SDM300L3.IOM D&I Primary Data Interfaces When configured for D&I operation, multiplexing/demultiplexing follows the IBS satellite frame structure and ESC features, but with the following changes: • • 15.15.2 Accepts and outputs primary data through the 50-pin connector using G.703. The data rate must be at T1 or E1 rates only. This includes additional links for Drop Data Out and Insert Data In.
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SDM-300L3 Satellite Modem Specifications 15.16.1 Revision 0 MN/SDM300L3.IOM IDR Primary Data Interfaces When configured for IDR operation, the board performs these functions: • • 15.16.2 Receives and performs clock and data recovery on incoming G.703 T1 and E1 pseudo-ternary data. Clock dejitter is performed per G.823 and G.824, and any data decoding (AMI, B8Z5, or HDB3) required per G.703 is also done.
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SDM-300L3 Satellite Modem Specifications Revision 0 MN/SDM300L3.IOM 15.17 System Specifications 15.17.1 Loopback Modes The operator can select one of the following interface loopback test modes. • • 15.17.2 Baseband: Near end and far end. Interface: Near end and far end (Reed-Solomon or Overhead only). Test Modes The following receive IF test modes are available.
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SDM-300L3 Satellite Modem Specifications 15.17.3 Revision 0 MN/SDM300L3.IOM Remote Control All modem functions can be controlled remotely through the remote connector on the rear panel. See the Remote Specification for the complete command and response structures and syntax. Interface type: • • • • EIA-485 (4- or-2-wire) or EIA-232 Baud Rate Range: 150 to 19.
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SDM-300L3 Satellite Modem Specifications 15.18 Revision 0 MN/SDM300L3.IOM Stored Faults All faults listed above will be stored in battery backed memory for up to 10 occurrences of each fault, along with the time and date of when the fault occurred, and, where applicable, when it cleared. All faults can be cleared by operator command. 15.19 Stored Configurations Five memories are available for storing the current modem configuration. These are maintained through a power off cycle. 15.
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Chapter 16. BUC FSK COMMUNICATIONS 16.1 Introduction The modulator includes capability to communicate with an ODU Block Up Converter (BUC) using an FSK signal multiplexed onto the IF output connector along with the TX IF signal, 10 MHX reference, and DC power to the BUC. The M&C implements commands to control BUC functions and to query the BUC for configuration or status information.
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SDM-300L3 Satellite Modem BUC FSK Communications Revision 0 MN/SDM300L3.IOM On power-up, the TX carrier is Off until the BUC is commanded to turn the carrier on (unless the unit is commanded into the power On mode at the factory). The BUC does not allow the carrier to be turned On unless the PLL is locked, and automatically turns the carrier Off in the event the PLL goes out-of-lock. If the PLL then comes back into lock, the BUC restores the carrier to the most recent requested state by the IDU.
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SDM-300L3 Satellite Modem BUC FSK Communications 16.2.2 Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem BUC FSK Communications Revision 0 MN/SDM300L3.IOM This page is intentionally left blank.
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Appendix A. REMOTE CONTROL OPERATION This appendix describes the remote control operation of the SDM-300L3. Firmware number: Software version: FW/8460-1M 2.1.12 Note: The firmware referenced in this manual may be an earlier version of the actual firmware supplied with the unit. A.1 General Remote controls and status information are transferred via an EIA-485 or EIA-232 serial communications link menu selection.
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SDM-300L3 Satellite Modem Remote Control Operation A.2 Revision 0 MN/SDM300L3.IOM Message Structure The ASCII character format used requires 11 bits/character: • • • • 1 start bit Information and Parity bits (select one) 7 information bits and 1 parity bit (Odd/Even) or 8 information bits (None) 2 stop bits Messages on the remote link fall into the categories of commands and responses.
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SDM-300L3 Satellite Modem Remote Control Operation A.2.3 Revision 0 MN/SDM300L3.IOM Command/Response The command/response portion of the message contains a variable-length character sequence which conveys command and response data. If a satellite modem receives a message addressed to it which does not match the established protocol or cannot be implemented, a negative acknowledgment message is sent in response. This message is: >add/?ER1_parity error'cr''lf'] (Error message for received parity errors.
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SDM-300L3 Satellite Modem Remote Control Operation A.2.4 Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Remote Control Operation Revision 0 MN/SDM300L3.IOM A.3 Configuration Commands/Responses A.3.1 Modulator Configuration Commands Modulator Frequency Command: Response: Status: Response: RF Output (IF Output) Modulator Rate Preset Assignment add/MF_nnnnn.nnnn'cr' RF_OFF'cr''lf'] add/MF_nnnnn.nnnn'cr''lf'] Where: nnnnn.nnnn = Frequency in MHz, 950.0000 to 1750.0000 in 100 Hz steps for non-terminal frequency display.
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SDM-300L3 Satellite Modem Remote Control Operation Power Level Revision 0 MN/SDM300L3.IOM Status: Response: add/MOP_snn.
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SDM-300L3 Satellite Modem Remote Control Operation ODU Power ODU Reference Enable ODU Power Monitor Low Current Threshold ODU Power Monitor High Current Threshold A.3.2 Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Remote Control Operation Descramble Enable Revision 0 MN/SDM300L3.IOM Command: Response: Status: Response: Command: Response: Status: Response: add/DE_xxx'cr''lf'] add/DE_xxx'cr''lf'] add/DDEC_xxx'cr''lf'] add/DDEC_xxx'cr''lf'] Where: xxx = ON or OFF.
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SDM-300L3 Satellite Modem Remote Control Operation LNB Voltage LNB Reference Enable LNB Power Monitor Low Current Threshold LNB Power Monitor High Current Threshold A.3.
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SDM-300L3 Satellite Modem Remote Control Operation Interface Loopback Interface Loop Timing Interface Buffer Size Revision 0 MN/SDM300L3.IOM Command: add/ILB_xxx'cr''lf'] Status: add/ILB_xxx'cr''lf'] Command: add/ILT_xxx'cr''lf'] Status: add/ILT_xxx'cr''lf'] Buffer size programming is supported in two formats; bits, or milli-seconds.
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SDM-300L3 Satellite Modem Remote Control Operation Interface Service Channel Level Command: Response: Status: Response: Revision 0 MN/SDM300L3.IOM add/ISCL_xxx_snn'cr''lf'] add/ISCL_xxx_snn'cr''lf'] Where: xxx = TX1, TX2, RX1, or RX2 (service channel designator). nnn = -20 to +10 in steps of 1 (service channel level in dBm).
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SDM-300L3 Satellite Modem Remote Control Operation Insert Channels Assignment Bulk Insert Channels Assignment Command: Response: Status: Response: Command: Response: Status: Response: Revision 0 MN/SDM300L3.IOM add/ICA_ii;cc'cr''lf'] add/ICA_ii;cc'cr''lf'] Where: ii = 1 to N (over the satellite insert channel); where N = (demodulator data rate) divided by (64 kbps). cc = 1 to 24 (terrestrial channel number for T1 data formats).
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SDM-300L3 Satellite Modem Remote Control Operation ASYNC Receive Channel Stop Bits ASYNC Transmit Overhead Channel Parity ASYNC Receive Overhead Channel Parity ASYNC Transmit Communica tions Type ASYNC Receive Communica tions Type Transmit Data Phase Receive Data Phase CTS Delay Time IDR Transmit ESC Type IDR Receive ESC Type IBS Transmit ESC Type IBS Receive ESC Type Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Remote Control Operation A.3.4 Revision 0 MN/SDM300L3.IOM System Configuration Commands Time Of Day Command: Response: Status: Response: add/TIME_hh:mmxx'cr''lf'] add/TIME_hh:mmxx'cr''lf'] Where: hh = 1 to 12 (hours). mm = 00 to 59 (minutes). xx = AM or PM. Date Command: Response: Status: Response: add/DATE_mm/dd/yyyy'cr''lf'] add/DATE_mm/dd/yyyy'cr''lf'] Where: mm = 1 to 12 (month).
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SDM-300L3 Satellite Modem Remote Control Operation RF Mode Control Command: Response: Status: Response: Revision 0 MN/SDM300L3.IOM add/RFMD_xxxx'cr''lf'] add/RFMD_xxxx'cr''lf'] Where: xxxx = NRM (Normal Mode), PWR (Turn RF off on power up), COMM (Turn RF off on power up and loss of remote communications after 10 seconds), CD (Turn RF ON when carrier is detected, turn RF OFF when no carrier is detected. For the RF ON condition, the TX-IF must be programmed ON.
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SDM-300L3 Satellite Modem Remote Control Operation AUPC Local Carrier Loss Action Revision 0 MN/SDM300L3.IOM Command: Response: Status: Response: add/LCL_xxxx'cr''lf'] add/LCL_xxxx'cr''lf'] Where: xxxx = HOLD, NOM, or MAX (power level setting when local carrier loss).
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SDM-300L3 Satellite Modem Remote Control Operation Revision 0 MN/SDM300L3.IOM A.4 Status Commands/Responses A.4.1 Modulator Configuration Status Modulator Config. Status Command: Response: add/MCS_'cr' RF_xxx'cr' MF_nnn.nnnnnnn'cr' MF_nnnnn.nnnn'cr' MR_nnnn_mmmm.mmm'cr' AMRA_nnnn_mmmm.mmm'cr' AMRB_nnnn_mmmm.mmm'cr'AM RC_nnnn_mmmm.mmm'cr' AMRD_nnnn_mmmm.mmm'cr' AMRV_nnnn_mmmm.mmm'cr' MPO_snn.n'cr' MOP_snn.
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SDM-300L3 Satellite Modem Remote Control Operation Modulator/ Coder Config. Program Status Command: Response: Revision 0 MN/SDM300L3.IOM add/MCP_'cr' SMT_xxxxxxx'cr' ITOT_xxxxx'cr' MOM_xxxxxxx'cr' MT_xxxxx'cr' MET_xxx'cr' MF_nnn.nnnnnnn'cr' MF_nnnnn.nnnn'cr' MR_nnnn_mmmm.mmm'cr' MPO_snn.n'cr' LPC_xxx'cr' (Note 10) MOP_snn.n'cr' (Note 4) SE_xxx'cr' DENC_xxx'cr' ILT_xxx'cr' ERF_nnnnn.
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SDM-300L3 Satellite Modem Remote Control Operation Revision 0 MN/SDM300L3.IOM Notes: 1. 2. 2. 3. 5. 6. 7. 8. 9. 10 11 Data is only returned for TX D&I Overhead (or Flex Mux D&I). Data is only returned for TX IDR Overhead. Data is only returned for TX ASYNC Overhead Data not returned if Local AUPC is enabled & TX ASYNC/AUPC overhead. Not Used. Not Used. Not Used. Not Used. Not Used. Data is only returned for TX ASYNC/AUPC Overhead. Data is only returned for the TX/RF L-Band modem.
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SDM-300L3 Satellite Modem Remote Control Operation Demod/ Decoder Config. Program Status Command: Response: Revision 0 MN/SDM300L3.IOM add/DCP_'cr' SMT_xxxxxxx'cr' IROT_xxxxx'cr' MOM_xxxxxxx'cr' BERT_xxxx'cr' DT_xxxx'cr' DDT_xxx'cr' DF_nnnnn.nnnn'cr' DR_nnnn_mmmm.mmm'cr' DE_xxx'cr' DEC_xxx'cr'IFL_xxx’cr’ (Note 9) SCF_snnnnn'cr' SWR_nnnnnn'cr' SR_xxx'cr' ILT_xxx'cr' ERF_nnnnn.
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SDM-300L3 Satellite Modem Remote Control Operation Revision 0 MN/SDM300L3.IOM Notes: 1. Data is only returned for RX D&I overhead (or Flex Mux D&I mode).is installed. 2. Data is only returned for RX IDR Overhead. 3. Data is only returned for RX ASYNC Overhead. 4. Not Used. 5. Not Used. 6. Not Used. 7. Not Used. 8. Data is only returned for RX ASYNC/AUPC Overhead. 9. Data is only returned for the TX/RF L-Band modem Interface Config.
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SDM-300L3 Satellite Modem Remote Control Operation MAXP_snn.n'cr' LCL_xxxx'cr' RCL_xxxx'cr' ENSP_nn.n'cr' MAXT_n.n'cr' RTSM_xxx'cr' TSD_xx'cr' IDRT_xxxxx'cr' IDRR_xxxxx'cr' IBST_xxxxx'cr' IBSR_xxxxx'cr' Revision 0 MN/SDM300L3.IOM (Note 5) (Note 5) (Note 5) (Note 6) (Note 6) (Note 3) (Note 4) (Note 3) (Note 4) AUPC Maximum Power Value AUPC Local Carrier Loss AUPC Remote Carrier Loss AUPC EBN0 Target Set Point AUPC Max.
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SDM-300L3 Satellite Modem Remote Control Operation A.4.3 Outdoor Unit Status Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Remote Control Operation A.4.4 Fault Status MODEM Faults Status (Summary) Command: Response: Modulator Status Command: Response: Demodulator Status Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Remote Control Operation Equipment Status Response: Interface Alarms (Backward Alarm) Status Command: Response: A.4.5 Raw BER Corrected BER >add/CES_'cr' M&C_xxx'cr' INT_xxx'cr' BAT_xxx'cr' +5_xxx'cr' +12_xxx'cr' -12_xxx'cr' ST_xxx'cr' MODE_xxxxxx'cr' SFLT_xx'cr''lf'] add/IAS_'cr' TXBWA1_xxx'cr' TXBWA2_xxx'cr' TXBWA3_xxx'cr' TXBWA4_xxx'cr' RXBWA1_xxx'cr' RXBWA2_xxx'cr' RXBWA3_xxx'cr' RXBWA4_xxx'cr' SFLT_xx'cr''lf'] Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Remote Control Operation Interface Read Error Status Command: Response: Revision 0 MN/SDM300L3.IOM add/IRES_tttt_xn.nE-ee'cr''lf'] Where: tttt = FRM (FRAME) or 2047 (indicates type of error being read). x = < or > (data modifier to indicate that the error rate is less than or greater than the returned value). m.m = 1.0 to 9.9 (error rate mantissa). ee = 1 to 99 (error rate exponent). This command returns frame or 2047 error rate.
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SDM-300L3 Satellite Modem Remote Control Operation Receive Signal Level Status Command: Response: Revision 0 MN/SDM300L3.IOM add/RSL_xsnn.ndBm'cr''lf'] Where: x = < or > (data modifier to indicate that the receive signal level is less than or greater than the returned value). s = + or - (receive signal level sign, plus or minus). nn.n = 0.0 to 99.9 (receive signal level magnitude). Notes: 1.
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SDM-300L3 Satellite Modem Remote Control Operation A.5 Revision 0 MN/SDM300L3.IOM Stored Faults Information on stored faults is returned when requested. If no stored fault exists for a given fault number, the words “NO Fault” will be returned instead of the normal time/date status information. The following symbols are commonly used to define the stored faults status commands: # = Fault number (0 to 9). “0” is the first fault stored. hh = Hours in 24-hr. format. mm = Minutes. ss = Seconds. MM = Month.
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SDM-300L3 Satellite Modem Remote Control Operation Interface Receive Side Stored Faults Command: Response: Common Equipment Stored Faults Command: Response: Interface Alarms Stored Faults Command: Response: ReedSolomon Unavailable Seconds Command: Response: Outdoor Unit Status TX L-Band modem Command: Response: Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Remote Control Operation Bulk Consol. Analog Status Command: Response: Revision 0 MN/SDM300L3.IOM add/BCAS_p1,p2,p3, . . . pn'cr''lf'] This command is similar to the 'BCS_' command, but returns modem analog parameters. Additional status of new options and features will always be appended to the end. Where 'pn' is the last parameter returned. Parameter Number 1 Parameter Name (Command Reference) Description p1 = xsnn.n, receive signal level in dBm.
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SDM-300L3 Satellite Modem Remote Control Operation Bulk Consol. Status Command: Response: Revision 0 MN/SDM300L3.IOM add/BCS_p1,p2,p3, . . . pn'cr''lf'] This command causes bulk modem status to be returned. To reduce the length of the response, message parameter data are returned without identifiers. However, parameter identification can be determined by order of return.
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SDM-300L3 Satellite Modem Remote Control Operation Revision 0 MN/SDM300L3.IOM Bulk Consol. Status (continued) Parameter Number 17 18 19 20 21 22 23 24 25 26 27 28 (Note 16) 29 30 31 32 33 34 Parameter Name (Command Reference) Demodulator rate (ref. 'DR_' command). Demodulator preset A (ref. 'ADRA_' command). Demodulator preset B assignment (ref. 'ADRB_' command). Demodulator preset C assignment (ref. 'ADRC_' command). Demodulator preset D assignment (ref. 'ADRD_' command).
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SDM-300L3 Satellite Modem Remote Control Operation Revision 0 MN/SDM300L3.IOM Bulk Consol. Status (continued) Parameter Number 35 36 37 38 39 40 41 42 43 Parameter Name (Command Reference) Transmit clock phase (ref. 'TCP_' command). Receive clock phase (ref. 'RCP_' command). Baseband loopback ref. 'BBL_' command). Interface loopback (ref. 'ILB_' command). Interface loop timing (ref. 'ILT_' command). TX Interface coding format (ref. 'ICFT_' command). RX Interface coding format (ref. 'ICFR_' command).
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SDM-300L3 Satellite Modem Remote Control Operation Revision 0 MN/SDM300L3.IOM Bulk Consol. Status (continued) Parameter Number 53 54 55 56 57 58 59 60 61 64 65 Insert Data Format (ref. 'IDF_' command). 63 66 67 (Note 2) 68 (Note 1) 69 70 Description p53 = n, where 'n' is '0' (NONE), '1' (DATA), or '2' (AIS). p54 = n, where 'n' is '0' (NONE), '1' (DATA), or '2' (AIS). p55 = nnn, service channel level in dBm. p56 = nnn, service channel level in dBm. p57 = nnn, service channel level in dBm.
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SDM-300L3 Satellite Modem Remote Control Operation Revision 0 MN/SDM300L3.IOM Bulk Consol. Status (continued) (Note 2) Parameter Number 71 (Note 2) 72 73 74 Description p71 = n, where 'n' is '0' (NRM), '1' (INV). p72 = n, where 'n' is '0' (off) or '1' (on). p73 = n, where 'n' is '0'(OFF), '1' (ON), '2' (CORR_OFF). Backward Alarm enable TX1 (ref. 'BW_TX1_' command). Backward Alarm enable TX2 (ref. 'BW_TX2_' command). Backward Alarm enable (ref. 'BW_TX3_' command). Backward Alarm enable TX4 (ref.
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SDM-300L3 Satellite Modem Remote Control Operation Revision 0 MN/SDM300L3.IOM Bulk Consol. Status (continued) (Note 5) Parameter Number 89 (Note 6) 90 (Note 5) 91 (Note 6) 92 (Note 5) 93 (Note 6) 94 (Note 14) 95 (Note 14) 96 (Note 14) 97 (Note 14) 98 (Note 15) 99 (Note 15) 100 (Note 14) 101 (Note 14 102 103 104 105 106 Parameter Name (Command Reference) ASYNC TX Channel Stop (ref. 'TCSB_' command). ASYNC RX Channel Stop Bits (ref. 'RCSB_' command).
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SDM-300L3 Satellite Modem Remote Control Operation Revision 0 MN/SDM300L3.IOM Bulk Consol. Status (continued) Parameter Number 107 108 109 110 (Note 3) 111 112 (Note 4) 113 (Note 3) 114 (Note 4) 115 116 117 118 119 120 (Note 8) Parameter Name (Command Reference) RTS TX-IF Control Mode (ref. 'RTSM_' command). CTS Delay Time (ref. 'CTSD_' command). Carrier Only Mode (ref. 'COM_' command). IDR TX ESC Type (ref. 'IDRT_' command). IDR RX ESC Type (ref. 'IDRR_' command). IBS TX ESC Type (ref.
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SDM-300L3 Satellite Modem Remote Control Operation Revision 0 MN/SDM300L3.IOM Notes: 1. Data will only be returned if TX Overhead is programmed for Drop & Insert. Comma is always returned. 2. Data will only be returned if RX Overhead is programmed for Drop & Insert. Comma is always returned. 3. Data will only be returned if TX Overhead is programmed for IDR/IBS. Comma is always returned. 4. Data will only be returned if RX Overhead is programmed for IDR/IBS. Comma is always returned. 5.
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SDM-300L3 Satellite Modem Remote Control Operation Bulk Consolidated Status Faults Command: Response: Revision 0 MN/SDM300L3.IOM add/BCSF_abcdefghijklmnopqr'cr''lf'] This command causes all modem fault status to be returned. To reduce the length of the response, fault status is embedded into the bit structure of the characters that are returned. Faults are indicated by a binary 1 in the designated bit position. Character 'a': Modulator fault status character 1. Bit 6 = 1 always.
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SDM-300L3 Satellite Modem Remote Control Operation Revision 0 MN/SDM300L3.IOM Character 'i': Interface transmit side faults character 3. Bit 6 = 1 always. Bit 5 = TX Audio Channel 1 Clip. Bit 4 = TX Audio Channel 2 Clip. Bit 3 = reserved. Bit 2 = reserved. Bit 1 = reserved. Bit 0 = reserved. Character 'j': Interface receive side faults character 1. Bit 6 = 1 always. Bit 5 = Insert fault. Bit 4 = reserved.
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SDM-300L3 Satellite Modem Remote Control Operation Change Status Command: Response: Revision 0 MN/SDM300L3.IOM Character 'r': Interface Reed-Solomon Unavailable Seconds Bit 6 = 1 always. Bit 5 = not used. Bit 4 = not used. Bit 3 through Bit 0 = Binary representation (0 to 10) of the number of Reed-Solomon Unavailable Seconds stored faults. Character 's': Outdoor Unit Status Character 1. Bit 6 = 1 always. Bit 5 = Current. Bit 4 = Voltage.
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SDM-300L3 Satellite Modem Remote Control Operation Boot M&C Firmware Information Command: Response: add/BFI_'cr' VER_xxx.yyy.zzz'cr' FW/nnnnnn-ddr'cr' mm/dd/yy'cr''lf'] Modem Options/ Misc. Information Command: Response: add/MOI_'cr' s,HGH_PWR'cr' s,HGH_STAB'cr' s,ASLT'cr' s,VIT'cr' s,SEQ'cr' s,SR'cr' s,LRV'cr' s,FRV'cr' s,CARD_1_PCB'cr' s,CARD_2_PCB'cr' s,CARD_3_PCB'cr' s,8PSK_2/3'cr' s,TX_ONLY'cr' s,RX_ONLY'cr' s,OQPSK’cr’ s,TX_L-BAND’cr’’If’] Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Remote Control Operation Card #1 Options/ Misc. Information Card #2 Options/ Misc. Information Command: Response: Command: Response: Revision 0 MN/SDM300L3.IOM add/C1OI_'cr' OH_01 list: s,G.
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SDM-300L3 Satellite Modem Remote Control Operation Serial Number State Of Product Command: Response: Command: Response: Revision 0 MN/SDM300L3.IOM add/SNUM_'cr' MODEM_xxxxxxxxx'cr' CARD_1_xxxxxxxxx'cr' (Note 1) CARD_2_xxxxxxxxx'cr' (Note 2) CARD_3_xxxxxxxxx'cr''lf'] (Note 3) add/SOP_'cr' add'cr' abc'cr' rrrrr bps'cr' 'cr' 'cr''lf'] Where: xxxxxxxxx = Serial number 000000000 to 999999999. Notes: 1. Data is only returned if Card #1 is installed.
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Glossary The following is a list of acronyms and abbreviations that may be found in this manual.
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SDM-300L3 Satellite Modem Glossary EIA EMC ESC ESD EXT REF CLK FAST FIFO FW GND Hz I/O IF INV kbps kHz LCD LED lf m M&C Max Mbps MC MFS MHz Mod MOP MSB MUX n N/A NC NO NRM OQPSK p PCB PLL PPM PSK QPSK RAM RD RF RR RS RT RTS RX RXD s SCT SD ST Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Glossary SYNC TT TTL TX TXCLK TXD UB US V VAC VCO VDC VIT W Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Glossary Revision 0 MN/SDM300L3.IOM This page is intentionally left blank.
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Index 2xADPCM Voice in 64 kbps IBS, 10-22 309 IBS Operation, 5-3 8PSK Decoding, 15-29 8PSK Encoding, 1-9, 15-14 BPSK Encoding, 1-8, 15-13 BUC FSK Communications, 16-1 Buffer Operation, 11-8 Buffering, 6-9 Buffer Centering, 15-27 Buffer Size, 6-12 A AC Power Connector, 3-14 Acquisition Time, 15-24 Activation Procedures, 14-2 AGC Output, 15-25 Alarms Connector and pinouts (J10), 3-13 Asymmetrical Loop Timing, 12-1 ASYNC, 11-7 ASYNC Channel EIA-485 2- and 4-Wire operation, 11-10 ASYNC Data Interface, 11-7 A
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SDM-300L3 Satellite Modem Index Revision 0 MN/SDM300L3.IOM D&I Framing Formats, 10-18 D&I Modem Defaults, 10-21 D&I Primary Data Interfaces, 15-37 D&I Specifications, 10-12 D&I G.
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SDM-300L3 Satellite Modem Index Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Index Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Index Revision 0 MN/SDM300L3.
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SDM-300L3 Satellite Modem Index Revision 0 MN/SDM300L3.IOM Valid ASYNC Baud Rates, 11-11 VSAT IBS Operation, 5-3 V.35 Specification V.10, V.
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SDM-300L3 Satellite Modem Installation and Operation Manual Addendum A Subject: Add Appendic B. Burst Mode Modulator Operation Part Number: MN/SDM300L3.AA0 Revision 0 Addendum A October 13, 2003 Special Instructions: This document contains new information for the SDM-300L3 Satellite Modem installation and operation manual, part number MN/SDM-300L3.IOM Rev. 0 dated August 1, 2003.
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Collating Instructions To update the manual, remove and insert the pages as follows: Remove Insert Appendix B (pages C-1 through C-18)
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Appendix B. Burst Mode Modulator Operation B.1 Burst Mode Modulator: Theory of Operation The modulator is composed of two basic sections: the baseband processing section and the RF section. The modem M&C controls all programmable functions in both sections. B.1.1 Burst Mode From the front panel, TX Terrestrial or SCT can be selected for the modulator clock input. An activity detector monitors the selected clock, to automatically switch the clock to SCT if there is a fault.
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SDM-300Ls Satellite Modem Burst Mode Modulator Operation Revision 0 Addendum A energy dispersal. There is no need for a differential encoder in burst mode, as the ambiguities are resolved using the unique word. The data signal passes to the 1/2 rate Viterbi K=7 convolutional encoder. The output of the encoder generates two separate data streams to drive the in-phase and quadrature channels of the modulator. The data signal passes through a set of variablerate digital Nyquist filters.
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SDM-300Ls Satellite Modem Burst Mode Modulator Operation B.2.2 Revision 0 Addendum A Modulation and Encoding Types QPSK modulation and 1/2 rate Viterbi forward error correction encoding is standard. Encoder Viterbi, K7 B.2.3 Code Rate 1/2 Modulation QPSK Scrambling Types One of the following scrambling types can be selected by the operator. • • B.2.4 A programmable seed 2^15 -1 Synchronous Scrambler.
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SDM-300Ls Satellite Modem Burst Mode Modulator Operation B.2.7 Revision 0 Addendum A Transmit Frequency Change Time The time between the end of a remote command and the end of the modem reply for frequency change and synthesizer lock will be < 200 mS. B.2.8 Phase Noise 1. The phase noise of the transmit IF output carrier is no worse than: dBc/Hz -66.0 -76.0 -86.0 -96.0 -96.0 Distance from Carrier 100 Hz 1 kHz 10 kHz 100 kHz 1 MHz 2. Fundamental AC line spurious is -42 dBc or lower. 3.
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SDM-300Ls Satellite Modem Burst Mode Modulator Operation B.2.12 Revision 0 Addendum A Modulated IF Output Shape The modem meets the following transmit output spectral mask specifications. The desired mask is selectable from the front panel or remotely. • • B.2.13 INTELSAT/EUTELSAT Closed net (Comtech EF Data) Spurious Emissions Spurious emissions are measured relative to the power of the modulated carrier.
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SDM-300Ls Satellite Modem Burst Mode Modulator Operation B.2.17 Revision 0 Addendum A Transmit Preamble In burst mode, when RTS transitions from false to true, the modem shall turn on the RF carrier and generate a burst preamble with the following characteristics: 96 symbols at 19.2 kbps 288 symbols at 57.6 kbps 352 symbols 31 symbols CW BIT TIMING UNIQUE WORD Channel contents: CW: I and Q channels contain all 1's Bit Timing: I: Q: Unique Word: I: Q: 1010... 1010...
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SDM-300Ls Satellite Modem Burst Mode Modulator Operation B.3 Revision 0 Addendum A Burst Mode Specifications Operating Frequency Range Type of Modulation Operating Channel Spacing Bit Error Rate Phase Noise Digital Interface (Field Changeable Plug-in Modules) One Interface per Module) General Specifications 950 to 1750 MHz, synthesized in 100 Hz steps QPSK Less than 0.5 dB degradation operating with 2 adjacentlike channels, each 10 dB higher at 1.3 times the symbol rate, or a minimum of 1.
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SDM-300Ls Satellite Modem Burst Mode Modulator Operation Revision 0 Addendum A Additional Modulator Specifications -5 to -30 dBm, adjustable in 0.
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METRIC CONVERSIONS Units of Length Unit Centimeter Inch Foot Yard Mile Meter Kilometer Millimeter 1 centimeter — 0.3937 0.03281 0.01094 6.214 x 10-6 0.01 — — 1 inch 2.540 — 0.08333 0.2778 1.578 x 10-5 0.254 — 25.4 1 foot 30.480 12.0 — 0.3333 1.893 x 10-4 0.3048 — — 1 yard 91.44 36.0 3.0 — 5.679 x 10-4 0.9144 — — 1 meter 100.0 39.37 3.281 1.094 6.214 x 10-4 — — — 1 mile 1.609 x 105 6.336 x 104 5.280 x 103 1.760 x 103 — 1.609 x 103 1.
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