Comtech EF Data is an AS9100 Rev B / ISO9001:2000 Registered Company DMD-2050E Universal Satellite Modem Installation and Operation Manual IMPORTANT NOTE: The information contained in this document supersedes all previously published information regarding this product. Product specifications are subject to change without prior notice.
Errata A for MN-DMD2050E Rev 2 Comtech EF Data Documentation Update Subject: Errata Part Number: PLM CO Number: Comments: Chapter 3, Theory of Operation ER-DMD2050E-EA2 (Errata documents are not subject to revision.) C-0028800 The new information will be included in the next released revision of the manual.
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Errata B for MN-DMD2050E Rev 2 Comtech EF Data Documentation Update Subject: Errata Part Number: PLM CO Number: Comments: ER-DMD2050E-EB2 Chapter 3 and Chapter 4 references to MN-DMDREMOTEOP manual ER-DMD2050E-EB2 (Errata documents are not subject to revision.) C-0028804 The new information will be included in the next released revision of the manual. See the following pages.
DMD2050E Universal Satellite Modem 4.4.6.6 User Interfaces SNMP (menu) A description of OID organization is provided in the MN-DMDREMOTEOP manual. SNMP MENU SNMP VERSION {V1 & V2, V3} This selection controls the SNMP Version that will be used in messaging between the equipment and it’s host. When V1 & V2 is used, RD COMMUNITY and RDWR COMMUNITY are used to determine the authorization of an incoming message. When V3 is used, three contexts are supported: public, mib2, and dev.
DMD2050E Universal Satellite Modem 3.2.6 Theory of Operation Modem Status, Alarms & Contact Closures (Section 3.2.9) Terminal Port This port supports an asynchronous control protocol as described in Chapter 4. It is configured to support RS-232 signal levels. This port is intended for use in computer-based remote M&C. All functions of the modem may be monitored and controlled from this port via a common terminal connected to the Terminal Port. This function is front panel selectable.
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Comtech EF Data is an AS9100 Rev B / ISO9001:2000 Registered Company DMD2050E Universal Satellite Modem Installation and Operation Manual Part Number MN-DMD2050E Revision 2 Copyright © Comtech EF Data, 2013. All rights reserved. Printed in the USA. Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, 480.333.2200, FAX: 480.333.
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DMD-2050E Universal Satellite Modem Table of Contents Revision 2 MN-DMD2050E Table of Contents PREFACE ................................................................................................................................. XIX About this Manual.................................................................................................................................. xix Cautions and Warnings ...................................................................................................
DMD-2050E Universal Satellite Modem Table of Contents CHAPTER 2. Revision 2 MN-DMD2050E INSTALLATION .............................................................................................. 2–1 2.1 Unpacking and Inspection .......................................................................................................... 2–1 2.2 Installation Safety ....................................................................................................................... 2–2 2.
DMD-2050E Universal Satellite Modem Table of Contents Revision 2 MN-DMD2050E 3.5.3.3 SCT: Serial Clock Transmit ............................................................................................ 3–17 3.5.3.4 EXT CLK/EXT BNC: External Clock, J16 .................................................................... 3–17 3.5.3.5 EXT IDI: Insert Data In .................................................................................................. 3–17 3.5.
DMD-2050E Universal Satellite Modem Table of Contents Revision 2 MN-DMD2050E 3.11.12.4 Estimating PSD Ratio from Satmaster ........................................................................ 3–47 3.11.12.5 Estimating PSD Ratio Using Spectrum Analyzer ....................................................... 3–47 3.11.13 DoubleTalk Carrier-in-Carrier Specifications................................................................. 3–48 3.11.14 Carrier-in-Carrier Summary ...................................
DMD-2050E Universal Satellite Modem Table of Contents Revision 2 MN-DMD2050E 4.4 Front Panel Main Menus............................................................................................................ 4–4 4.4.1 MODULATOR Main Menu and Parameters ........................................................................ 4–5 4.4.1.1 NETWORK SPEC (menu)................................................................................................ 4–5 4.4.1.2 STRAP CODE .............................
DMD-2050E Universal Satellite Modem Table of Contents Revision 2 MN-DMD2050E 4.5 Terminal Mode Control............................................................................................................ 4–38 4.5.1 Terminal Mode Screens ...................................................................................................... 4–38 4.5.2 Terminal Mode Operations ................................................................................................. 4–38 4.5.
DMD-2050E Universal Satellite Modem Table of Contents Revision 2 MN-DMD2050E 6.4 Alarm Masks ............................................................................................................................... 6–8 6.4.1 Active Alarms ....................................................................................................................... 6–8 6.4.1.1 Major Alarms ....................................................................................................................
DMD-2050E Universal Satellite Modem Table of Contents 7.12.14 7.12.15 7.12.16 7.12.17 7.12.18 7.12.19 7.13 Revision 2 MN-DMD2050E B/O/QPSK BER Performance (LDPC) ........................................................................... 7–22 8PSK / 8QAM BER Performance (LDPC) ..................................................................... 7–23 16QAM BER Performance (LDPC) ...............................................................................
DMD-2050E Universal Satellite Modem Table of Contents D.2.2 Revision 2 MN-DMD2050E IP Address ............................................................................................................................ D–2 D.3 Web Interface Security .............................................................................................................. D–2 D.3.1 Default User Accounts ......................................................................................................... D–2 D.3.
DMD-2050E Universal Satellite Modem Table of Contents Revision 2 MN-DMD2050E E.4.3.3 PCM-31 ............................................................................................................................. E–6 E.4.3.4 PCM-31C .......................................................................................................................... E–7 E.4.3.5 T1-D4/T1-D4-S................................................................................................................. E–7 E.4.3.
DMD-2050E Universal Satellite Modem Table of Contents APPENDIX H. Revision 2 MN-DMD2050E ETHERNET DATA INTERFACE SETUP...................................................... H–1 H.1 Configuring the modem to use the Ethernet Data Interface (Optional) ............................... H–1 H.1.1 Ethernet Flow Control.......................................................................................................... H–2 H.1.1.1 Half-Duplex Flow Control ....................................................
DMD-2050E Universal Satellite Modem Table of Contents Revision 2 MN-DMD2050E Tables Table 3-1. Spectral Efficiency using DoubleTalk Carrier-in-Carrier ........................................................ 3–32 Table 3-2. Available TPC and LDPC Modes........................................................................................... 3–53 Table 3-3. Comparison of all Comtech EF Data TPC and LDPC Modes (DMD2050E with LDPC/TPC Codec) ..................................................................
DMD-2050E Universal Satellite Modem Table of Contents Revision 2 MN-DMD2050E Figures Figure 1-1. DMD2050E Universal Satellite Modem Front Panel ............................................................. 1–1 Figure 3-1. DMD2050E Block Diagram..................................................................................................... 3–1 Figure 3-2. IF Card Block Diagram ........................................................................................................... 3–2 Figure 3-3.
DMD-2050E Universal Satellite Modem Table of Contents Revision 2 MN-DMD2050E Figure D-3. Monitor and Control Web Page............................................................................................. D–8 Figure E-1. Looped Modems ...................................................................................................................E–3 Figure E-2 Looped Modems with Separate D&I Trunks ..........................................................................E–3 Figure E-3 Drop Only .
PREFACE About this Manual This manual gives installation and operation information for the Comtech EF Data DMD2050E Universal Product Modem. This is a technical document intended for anyone who operates the unit. Cautions and Warnings WARNING indicates a potentially hazardous situation that, if not avoided, could result in death or serious injury. CAUTION indicates a hazardous situation that, if not avoided, may result in minor or moderate injury.
DMD2050E Universal Product Modem Preface Revision 2 MN-DMD2050E Electrical Safety The DMD2050E has been shown to comply with the EN 60950 Safety of Information Technology Equipment (including electrical business machines) safety standard.
DMD2050E Universal Product Modem Preface Revision 2 MN-DMD2050E Environmental Do not operate the DMD2050E in an environment where the unit is exposed to extremes of temperature outside the ambient range 0 to 50°C, precipitation, condensation, or humid atmospheres above 95% RH, altitudes (un-pressurised) greater than 2000 metres, excessive dust or vibration, flammable gases, corrosive or explosive atmospheres.
DMD2050E Universal Product Modem Preface Revision 2 MN-DMD2050E CE Mark Comtech EF Data declares that the DMD2050E meets the necessary requirements for the CE Mark. RoHS The DMD2050E satisfies (with exemptions) the requirements specified in the European Union Directive on the Restriction of Hazardous Substances, Directive 2002/95/EC, (EU RoHS).
DMD2050E Universal Product Modem Preface Revision 2 MN-DMD2050E Product support On the web http://www.comtechefdata.com/support.asp Return material authorization http://www.comtechefdata.com/rmaform.asp Support business hours Support Business Hours: Monday through Friday, 8:00 a.m. to 5:00 p.m. (MST) After hours and weekends Brand: Comtech EF Data Tel: +1.480.333.4357 Brand: Radyne Tel: +1.602.980.5220 Comtech EF Data and Radyne support contacts Products Contact • Satellite Modems Tel: +1.480.
DMD2050E Universal Product Modem Preface Revision 2 MN-DMD2050E Warranty Policy Comtech EF Data products are warranted against defects in material and workmanship for a specific period from the date of shipment, and this period varies by product. In most cases, the warranty period is two years. During the warranty period, Comtech EF Data will, at its option, repair or replace products that prove to be defective.
Chapter 1. Introduction 1.1 Overview The new DMD2050E Satellite Modem (Figure 1-1) breaks new ground in flexibility and performance. The modulator has the ability to interoperate with military standards based upon MIL-STD-188-165A, MIL – STD-188-16B (Draft Standard), STANAG 4486 Edition 3, OM73 and support commercial standards that include IDR, IBS and DVB.
DMD2050E Universal Product Modem Introduction The DMD2050E supports a full range of Industry Standard Interfaces that include MIL-188-114 (EIA-530), EIA-613 (HSSI), and 10/100/1000 Base T Gigabit Ethernet Bridge. Additional features defined by STANAG 4486 include Serial, Ethernet and Asynchronous overhead data multiplexing/de-multiplexing capabilities. The extensive list of software options allows for the deployment of a modem with today's needs while keeping an eye toward tomorrow.
DMD2050E Universal Product Modem Introduction • Switchable between spur-free 70/140 MHz and L-Band operations • AC or DC Power Input • Functions in virtually all Military and Commercial Satellite IP, Telecom, Video and Internet applications • • Military standards include: • MIL-STD-188-165A • STANAG 4486 Edition 3 • MIL-STD-188-16B (Draft Standard) • OM73 Commercial standards include: • IDR • IBS • DVB 1.2.
DMD2050E Universal Product Modem Introduction 1.2.4 Interfaces Industry-standard interfaces include: • MIL-188-114 (EIA-530) • EIA-613 (HSSI) • 10/100/1000 Base T Gigabit Ethernet Bridge Additional features defined by STANAG 4486 include Serial, Ethernet and Asynchronous overhead data multiplexing and demultiplexing. 1.2.5 Remote Control and Monitoring The DMD2050E has a Vacuum Fluorescent Display (VFD) on the front panel.
DMD2050E Universal Product Modem 1.2.7.
DMD2050E Universal Product Modem 1.
Chapter 2. Installation 2.1 Unpacking and Inspection CAUTION Do not damage the carton contents with a cutting tool. Use a cutting tool that has a maximum blade length of 1/2 inch when you open the carton. Step 1 Procedure Inspect all shipping cartons for damage. Note: If damage exists, contact the freight company and Comtech EF Data immediately. 2 Cut the tape at the top of the carton. 3 Remove the packing material that covers the equipment. 4 Remove the equipment.
DMD2050E Universal Satellite Modem 2.2 Installation Installation Safety The unit is shipped fully assembled. Do not remove the covers when you install the unit. WARNING SHOCK HAZARD - There are no user-serviceable parts or configuration settings inside the DMD2050E chassis. There is a shock hazard at the internal power supply module. DO NOT open the DMD2050E chassis under any circumstances. WARNING: DANGER OF EXPLOSION if you replace the battery incorrectly. The unit contains a Lithium Battery.
DMD2050E Universal Satellite Modem 2.3.1 Installation Location The unit is intended for indoor use only. Do not install the unit in an unprotected outdoor location. Direct contact with rain, snow, wind or sun causes damage to the unit. Do not put units above high heat or an EMF generator. High heat and EMF have an unwanted effect on output signals and receive operations. Install the unit into any standard 19-inch equipment cabinet or rack. The unit is a one rack unit (RU) (1.
DMD2050E Universal Satellite Modem 2.3.5 Installation Cables To meet EMC directives, make sure to use shielded cables that have the shield terminated to the conductive backshells. To meet low voltage directives, use cables that have insulation flammability ratings of 94 VO or better. CAUTION Before you install the mating connectors, first make sure to start the unit and set the Interface Type (MIL-188-114A, G.703, etc.) from the front panel.
DMD2050E Universal Satellite Modem Installation IMPORTANT Strap Code 26 can set the following modem configuration. The Frequency and Modulator Output Power are set independently of the strap code. See also: Appendix I. Strap Codes 2.5 Modulator Checkout Make sure that the unit is installed near applicable electrical power and supporting equipment. 2.5.1 Initial Start Up Typically, new units are shipped from the factory with the Transmit Carrier set to OFF.
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Chapter 3. Theory of Operation 3.1 DMD2050E Hardware The DMD2050E is based on a two printed circuit card (minimum configuration) design with additional optioned printed circuit cards available for additional features. The minimum configuration consists of an L-Band/IF Assembly and a Digital Baseband Assembly. The optional printed circuit cards include a Turbo Codec printed circuit card and one of several types of Interface printed circuit card (refer to Appendix A).
DMD2050E Universal Satellite Modem 3.1.1 Theory of Operation DMD2050E L-Band/IF Printed Circuit Card The L-Band/IF Printed Circuit Card consists of an analog modulation function, an analog complex downconversion, and two wide-band digital synthesizers. The block diagram of the L-Band/IF Assembly is shown in Figure 3-2. Figure 3-2.
DMD2050E Universal Satellite Modem 3.1.2 Theory of Operation DMD2050E Baseband Processing Printed Circuit Card The advent of million-plus gate count FPGAs, advanced logic synthesis tools, and DSPs providing hundreds of MIPs enabled the design of a software configurable modem. Large, fast FPGAs now provide designers with what is essentially an on the fly programmable ASIC.
DMD2050E Universal Satellite Modem Theory of Operation Figure 3-3.
DMD2050E Universal Satellite Modem Theory of Operation The M&C System is based on a powerful microprocessor with a large amount of Flash memory. Several bus architectures are used to interconnect the M&C to all components of the DMD2050E. Communication to the outside world is done via connections to the remote port, terminal port, Ethernet port, and alarm ports. The M&C runs off software programmed into its Flash memory.
DMD2050E Universal Satellite Modem Theory of Operation Figure 3-4. DMD2050E Universal Satellite Modem Functional Block Diagram 3.2.3 Tx Baseband Processing The Tx Data and Clock enters the Baseband Processor, passes through a Rate Adapting FIFO and enters the Framer/Drop Processor. In Closed-Net Mode, the data passes through the framer unaltered. In IDR, IBS, and D&I Modes, the framer adds the appropriate framing and ESC as defined in IESS-308 and 309.
DMD2050E Universal Satellite Modem Theory of Operation The Reed-Solomon Encoder, encodes the data into Reed-Solomon Blocks. The blocks are then interleaved and synchronized to the frame pattern as defined by the selected specification (IESS308, IESS-309, DVB, etc.). After Reed-Solomon Encoding, the composite data and clock are applied to the BB Loopback Circuit. 3.2.4 Rx Baseband Processing The Receive Processor performs the inverse function of the Tx Processor.
DMD2050E Universal Satellite Modem • 3.2.6 Theory of Operation Modem Status, Alarms & Contact Closures (Section 3.2.9) Terminal Port This port supports an asynchronous control protocol as described in Chapter 4. It is configured to support RS-232 signal levels. This port is intended for use in computer-based remote M&C. All functions of the modem may be monitored and controlled from this port via a common terminal connected to the Terminal Port. This function is front panel selectable.
DMD2050E Universal Satellite Modem 3.2.8 Theory of Operation Ethernet M&C Port This port is dedicated for Ethernet Communications supporting SNMP, FTP and Web Browser. The port is configured for 10 Base-T communications protocols. The Ethernet M&C Interface requires a standard RJ45 Male connector. See also: Appendix D, Web Interface Setup Guide Appendix F, TCP/IP Ethernet Setup 3.2.
DMD2050E Universal Satellite Modem 3.3 Theory of Operation Internal Clock The time and date is kept in order to ‘time-tag’ system events. User can change the Internal Clock via the front panel, Web Browser or Terminal ports. 3.4 Loopback Features (Terrestrial & IF) The modem provides for a number of different loopbacks.
DMD2050E Universal Satellite Modem Theory of Operation Figure 3-5.
DMD2050E Universal Satellite Modem Theory of Operation Figure 3-6.
DMD2050E Universal Satellite Modem Theory of Operation Figure 3-7. Loopback Functional Block Diagram 3.5 DMD2050E Clocking Options The following paragraphs define the types of clocking options available to the user at the Front Panel of the DMD2050E. Refer to Figure 3-8 for clocking and polarity. 3.5.1 Clock Selection The modem supports a number of different clocking options that can be recovered from the satellite or the terrestrial links.
DMD2050E Universal Satellite Modem Theory of Operation INVERT NONE INV. TERR&BASE INV. BASEBAND INV.
DMD2050E Universal Satellite Modem 3.5.2.1 Theory of Operation SCTE: Serial Clock Transmit External The SCTE clock is the Transmit Terrestrial Clock associated with the data interface. SCTE is an external clock received from the terrestrial equipment and the modem utilizes the terrestrial clock to lock the internal clock. In Figure 3-7, the Transmit Terrestrial Data enters the modem and is clocked into a dejitter FIFO. Data is clocked out of the FIFO by the Modulator Clock.
DMD2050E Universal Satellite Modem 3.5.3 Theory of Operation RX Buffer Clock Options The modem supports a number of RX Buffer clock options that can be recovered from the satellite, terrestrial links, internally or externally. The various clocking options allow users to determine which clock will best fit their applications. Figure 3-7 gives an overview on how the modem processes the various clocks for the Tx Clock and the Rx Buffer Clock.
DMD2050E Universal Satellite Modem 3.5.3.3 Theory of Operation SCT: Serial Clock Transmit If SCT clock is selected as the RX Buffer clock source, then it should be configured for internal. SCT is sometimes referred to as Internal Timing or Send Timing (ST). 3.5.3.4 EXT CLK/EXT BNC: External Clock, J16 The External Clock that can be selected as the RX Buffer clock source. This is a 75ohm unbalanced BNC connector. This clock source is also identified as EXT BNC.
DMD2050E Universal Satellite Modem 3.6 Theory of Operation Transmit Timing Options As shown in Figure 3-7, Transmit Terrestrial Data enters the modem and is clocked into a dejitter FIFO. Data is clocked out of the FIFO by the Modulator Clock. The Modulator Clock and PhaseLocked Loop (PLL), in conjunction with the Dejitter FIFO, reduces the input jitter. Jitter reduction exceeds the jitter transfer specified in CCITT G.821. 3.6.
DMD2050E Universal Satellite Modem 3.6.4 Theory of Operation Ethernet Data Interface (Optional) The modem support a single port 10/100/1000 Base T Interface. When this interface is selected additional menus will be displayed. Refer to Appendix H for interface set up and description of supporting features. When Ethernet Data Interface is selected, the Tx Clock Source will default to SCTE and the Clock Polarity will default to Normal.
DMD2050E Universal Satellite Modem 3.8 Theory of Operation Ebem Framing Unit The DMD2050E EBEM framing Unit provides the ability to multiplex both Serial (MIL-STD-188114A or Hgh Speed Serial Interface – HSSI) with Bridged Ethernet payload, overhead and embedded channel data within the over-the-air transport stream. 3.8.1 DMD2050E Information Throughput Adpatation (ITA) Refer to Appendix I for additional information. 3.8.
DMD2050E Universal Satellite Modem 3.10 Theory of Operation FIPs TRANSEC Module The DMD2050E FIPS Security Module provides bulk encryption and decryption of traffic over the satellite that conforms to Security Level 2 as defined in FIPS PUB 140-2 using NIST approved 256-bit AES encryption (Advanced Encryption Standard). Bulk Encryption includes all data coming from the baseband user ports (baseband serial port, overhead channel port and the embedded channel).
DMD2050E Universal Satellite Modem Theory of Operation TX OFF Need to make timers configurable Idle Event: Timer Expired Action: Return to Idle Event: TX ON Action: None MnC initiated Mailbox message to FIPs FIPs initiated mailbox message to MnC, MnC responds back once embedded channel is up or timeout occurs.
DMD2050E Universal Satellite Modem Theory of Operation Startup MnC needs to mail the overriding state of the decryption to the FIPs may not be enabvled Event: KA Received, Encryption Not Enabled Action: Send Key Agreement NACK Idle Event: Key Agreement Message (KA) Received Action: Create Key Agreement Response (KAR) Message, Send KAR Message, Compute TDK, Load TDK Lynyx sets everyone up to start the decryption process, the TRANSEC FPGA initiates based on SOF and TEK Update message (Key Roll) Waiting
DMD2050E Universal Satellite Modem Theory of Operation 3.10.1.2 Key Agreement Algorithm The key agreement algorithm used to negotiate a shared secret is the Ephemeral Unified Model, Elliptic Curve Cryptography Cofactor Diffie-Hellman C(2,0,ECC CDH) as specified in the elliptic curve parameters section of NIST SP 800-56A(3). 3.10.1.2.
DMD2050E Universal Satellite Modem Theory of Operation After you have enabled Encryption from the front panel, set up the Encryption Control parameters. 1. Use the secure web interface (Figure 3-11) or the handheld key-loader (Figure 3-12) to enter Encryption Control parameters. 2. Enter a maximum of 78 numeric characters into the Random Number Generator (RNG) Seed field. 3. Enter a maximum of 40 alpha numeric characters into the Shared Message Authentication Token (SMAT) field. Figure 3-11.
DMD2050E Universal Satellite Modem Theory of Operation Figure 3-12. DMD2050E Handheld Key Loader 3.11 DoubleTalk Carrier-in-Carrier Option WARNING Before you commission a satellite link with Carrier-in-Carrier, make sure that the link is sufficient for normal operation and all system settings are correct. Incorrect link setup has an unwanted effect on the system.
DMD2050E Universal Satellite Modem 3.11.1 Theory of Operation What is DoubleTalk Carrier-in-Carrier? The DMD2050E DoubleTalk Carrier-in-Carrier option utilizes a patented signal processing algorithm developed by Raytheon Applied Signal Technology, that allows both the forward and reverse carriers of a full duplex link to share the same segment of transponder bandwidth, using patented “Adaptive Cancellation.
DMD2050E Universal Satellite Modem • Theory of Operation The transponder needs to be “bent-pipe” – meaning no on-board processing, demodulation, regeneration can be employed. Demodulation/remodulation does not preserve the linear combination of the forward and return signals and the resulting reconstituted waveform prevents recovery of the original constituent signals. Figure 3-1 shows a simplified conceptual block diagram of CnC processing.
DMD2050E Universal Satellite Modem Theory of Operation DMD2050E CnC Module DMD2050E Figure 3-13. Conceptual Block Diagram In a number of ways, CnC carriers behave similar to conventional carriers in satellite links. They are both exposed to adjacent carriers, cross-polarization and rain fade, and exhibit impairments when any of these become too great.
DMD2050E Universal Satellite Modem • The ratio of power spectral density is normally less than 11 dB; • CnC operates with modems – not modulators only or demodulators only. Theory of Operation In addition, to minimize ‘false’ acquisition, observe the following: • Use of IESS-315 V.
DMD2050E Universal Satellite Modem Theory of Operation Figure 3-11 shows the same link using the DMD2050E equipped with the DoubleTalk Carrier-inCarrier option. Note that now only 50% of the bandwidth is being used, as now both carriers are occupying the same bandwidth.
DMD2050E Universal Satellite Modem Traditional Full Duplex Link Theory of Operation Duplex Link with DoubleTalk Carrier-in-Carrier Figure 3-16. Duplex Link Optimization Because acquiring the delay and frequency offset of the interfering carrier is fundamentally a correlation operation, anything deterministic in the interfering carrier (within the correlation window of the algorithm) will potentially produce false correlation peaks and result in incorrect delays and/or frequency.
DMD2050E Universal Satellite Modem Theory of Operation QPSK 3/4 1.50 3.00 QPSK 7/8 1.75 3.50 8-QAM 2/3 2.00 4.00 8-QAM 3/4 2.25 4.50 8-QAM 7/8 2.63 5.25 16-QAM 3/4 3.00 6.00 16-QAM 7/8 3.50 7.00 As shown here, DoubleTalk Carrier-in-Carrier allows equivalent spectral efficiency using a lower order modulation and/or FEC Code Rate; CAPEX is therefore reduced by allowing the use of a smaller BUC/HPA and/or antenna.
DMD2050E Universal Satellite Modem Theory of Operation Figure 3-17. DoubleTalk Carrier-in-Carrier Signals Referring to Figure 3-5: Modem 1 and Modem 2 transmit signals S1 and S2 respectively. The satellite receives, translates, and retransmits the composite signal. The downlink signals S1* and S2*, received at Modem 1 and Modem 2 differ from the transmit signals primarily in terms of phase, frequency, and delay offsets.
DMD2050E Universal Satellite Modem Theory of Operation Unwanted interfering signal suppression of 30 dB or more has been achieved in commercial products with minimal degradation of the demodulator performance. 3.11.6 Margin Requirements Typical interfering signal cancellation is 28 to 35 dB (depending on the product). The residual interfering signal appears as noise causing a slight degradation of the Eb/No.
DMD2050E Universal Satellite Modem Theory of Operation involves trying different FEC and modulation combinations with Carrier-in-Carrier until an optimal combination is found. For optimal Carrier-in-Carrier performance, it is recommended that the two carriers have similar symbol rate and power. This can be achieved by selecting appropriate MODCODs as shown in following sections. 3.11.9.
DMD2050E Universal Satellite Modem Theory of Operation Carrier-in-Carrier link design involved trying different Modulation & FEC Code Rates to find the optimal combination: • 8-QAM, LDPC 2/3 with Carrier-in-Carrier • QPSK, LDPC 3/4 with Carrier-in-Carrier • QPSK, LDPC 2/3 with Carrier-in-Carrier • QPSK, LDPC 1/2 with Carrier-in-Carrier MN-DMD2050E Revision 2 3–37
DMD2050E Universal Satellite Modem Theory of Operation Link parameters and LST summary for QPSK, LDPC 2/3 with Carrier-in-Carrier is as follows: MN-DMD2050E Revision 2 3–38
DMD2050E Universal Satellite Modem Theory of Operation The link budget summary for the different MODCOD combinations is as follows: S. No. Modulation & FEC Allocated BW PEB Leased BW (MHz) (MHz) (MHz) Savings PSD Compared Ratio to Original (dB) 1 8-QAM, LDPC 2/3 0.3584 1.1468 1.1468 -20% 2.1 2 QPSK, LDPC 3/4 0.47785 0.6734 0.6734 30% 2.1 3 QPSK, LDPC 2/3 0.53735 0.5777 0.5777 40% 2.1 4 QPSK, LDPC 1/2 0.7168 0.5184 0.7168 25% 2.
DMD2050E Universal Satellite Modem Theory of Operation While the traditional link was based on QPSK, TPC 3/4 and required 3.9 MHz of leased bandwidth, the Carrier-in-Carrier link was based on QPSK, LDPC 3/4 and QPSK, LDPC 1/2 and required 2.8 MHz of leased bandwidth.
DMD2050E Universal Satellite Modem Theory of Operation 3.11.9.3 Power Limited Links Carrier-in-Carrier can provide substantial savings even when the original link is power limited. Spreading the carrier by using a lower modulation and/or FEC along with the latest FEC can substantially reduce the total power which can then be traded with bandwidth using Carrier-inCarrier. The concept is illustrated with the following examples.
DMD2050E Universal Satellite Modem Theory of Operation Whereas the original link used 8-PSK TPC 3/4, the Carrier-in-Carrier link used QPSK STANAG TURBO 7/8. The savings summary is as follows: Item Original Link With Carrier-in-Carrier and Savings STANAG TURBO 7/8 Hub to Remote To Remote Hub Hub to Remote Remote to Hub 2048 2048 2048 2048 8-PSK 8-PSK QPSK QPSK TPC 3/4 TPC 3/4 7/8 7/8 1.3 1.3 2.6 1.8 1.8 1.8 2.2 1.0 3.2 1.1 0.5 1.
DMD2050E Universal Satellite Modem Theory of Operation Step Procedure 1c Make sure CnC function is OFF at both sites. 1d Using a spectrum analyzer, measure Co+No/No at the input to the modem at Site A. 1e Using a spectrum analyzer, measure Co+No/No at the input to the modem at Site B. 1f Measure/record Eb/No at Site B. Make sure there is sufficient margin to account for CnC. 1g Measure/record Receive Signal Level (RSL) at Site B. 2a Turn OFF the carrier at Site A.
DMD2050E Universal Satellite Modem Theory of Operation 3.11.11 Validating Carrier-in-Carrier Performance Carrier-in-Carrier performance can be easily validated by verifying that Eb/No degradation because of Carrier-in-Carrier is within published specification for the observed Power Spectral Density Ratio.
DMD2050E Universal Satellite Modem Theory of Operation 3.11.12 Operational References 3.11.12.
DMD2050E Universal Satellite Modem 3.11.12.2 Theory of Operation Estimating PSD Ratio PSD can be estimated from a link budget using Downlink EIRP and Symbol Rate: PSD = Downlink EIRP – 10 * Log (Symbol Rate) PSD Ratio Example: Carrier Downlink EIRP Symbol Rate Power Spectral Density A to B 27 dBW 500 ksps -29.99 dBW/Hz B to A 24 dBW 375 ksps -31.74 dBW/Hz PSD Ratio (@ A) = -29.99 – (-31.74) = 1.75 dB PSD Ratio (@ B) = 01.74 – (-29.99) = -1.75 dB 3.11.12.
DMD2050E Universal Satellite Modem 3.11.12.4 Estimating PSD Ratio from Satmaster 3.11.12.5 Estimating PSD Ratio Using Spectrum Analyzer Theory of Operation PSD Ratio or CnC Ratio can also be estimated using a Spectrum Analyzer capable of integrating the signal power in a given bandwidth.
DMD2050E Universal Satellite Modem Theory of Operation 3.11.
DMD2050E Universal Satellite Modem Theory of Operation 3.11.14 Carrier-in-Carrier Summary Comtech EF Data’s DoubleTalk Carrier-in-Carrier can provide significant savings in operational expenses. The following should be considered when evaluating DoubleTalk Carrier-in-Carrier: • DoubleTalk Carrier-in-Carrier can only be used for full duplex links where the transmitting earth station is able to receive itself.
DMD2050E Universal Satellite Modem Theory of Operation Leased bandwidth Almost all satellite operators charge for the Leased Bandwidth (LBW). Leased Bandwidth or Leased Resource is the greater of the Allocated Bandwidth and Power Equivalent Bandwidth. For example, if a carrier requires 3 MHz of Allocated BW and 4.5 MHz of PEB, the Leased Bandwidth is 4.
DMD2050E Universal Satellite Modem Theory of Operation C/N = C/No – 10 log B [where B is bandwidth in Hz] Eb/No = C/No – 10 log R [where R is data rate in bits/sec] = C/N + 10 log B – 10 log R = C/N – 10 log (Spectral Efficiency) Eb/No = 10 log (10 ((Co+No/No)/10) – 1) – 10 log (Spectral Efficiency) [Spectral Efficiency is in bps / Hz] 3.
DMD2050E Universal Satellite Modem Theory of Operation exhibits inherently low decoding latency compared with TCC, and so is considered much more desirable for 2-way, interactive satellite communications applications. In August 1999, Comtech became the first company in the world to offer satellite modems that incorporate TPC.
DMD2050E Universal Satellite Modem Theory of Operation It can be seen from this graph that, for Code Rates above 3/4, Comtech’s TPCs are very close (1-1.5 dB) to the Shannon Limit. However, at 3/4 and below, LDPCs are performing 0.7-1.2 dB better than TPCs. Figure 3-19. TPC & LDPC Modes Performance (Relative to Shannon Limit) It is clear that, in order to provide the best possible performance over the range of code rates from 1/2 to 0.95, both an LDPC and a TPC codec need to be offered.
DMD2050E Universal Satellite Modem Lower Data Rate Limit Upper Data Rate Limit (kbps) (kbps) Rate 7/8 16-QAM 63.0 25000.0 Rate 0.95 QPSK, OQPSK (aka 17/18) 34.2 23611.1 Rate 0.95 8-PSK , 8-QAM (aka 17/18) 52.0 25000.0 Rate 1/2 BPSK 18.0 6250.0 Rate 1/2 QPSK, OQPSK 18.0 12500.0 Rate 2/3 QPSK, OQPSK 24.0 16666.6 Rate 2/3 8-PSK , 8-QAM 36.0 25000.0 Rate 3/4 QPSK, OQPSK 27.0 18750.0 Rate 3/4 8-PSK , 8-QAM 40.5 25000.0 Rate 3/4 16-QAM 54.0 25000.
DMD2050E Universal Satellite Modem Theory of Operation Table 3-3. Comparison of all Comtech EF Data TPC and LDPC Modes (DMD2050E with LDPC/TPC Codec) Eb/No at Mode BER = 10-6 (typical) Eb/No at BER = 10-8 (typical) Spectral Efficiency (bps per Hertz) Symbol Rate Occupied * Bandwidth for 1 Mbps Carrier QPSK Rate 1/2 Viterbi * 5.5 dB 6.8 dB 1.00 bps/Hz 1.0 x bit rate 1190 kHz BPSK Rate 1/2 LDPC 1.7 dB 1.9 dB 0.50 bps/Hz 2.0 x bit rate 2380 kHz BPSK Rate 21/44 TPC 2.8 dB 3.0 dB 0.
DMD2050E Universal Satellite Modem 3.12.2 Theory of Operation TPC and LDPC Summary FOR AGAINST Exceptionally good BER performance – significant improvement compared with every other FEC method in use today. Most modes have no pronounced threshold effect – fails gracefully. Exceptional bandwidth efficiency . Nothing! Coding gain independent of data rate (in this implementation). Low decoding delay for TPC. Easy field upgrade in DMD2050E. 3.
DMD2050E Universal Satellite Modem Theory of Operation When the signal is received and demodulated by the Receiving Modem, it is fed to a Viterbi Decoder for the first layer of error correction. After error correction is performed by the Viterbi Decoder, the unique words are located and the data is deinterleaved and reformed into blocks. The R-S Decoder then corrects the leftover errors in each block. The data is then descrambled and output from the R-S Section. 3.13.
DMD2050E Universal Satellite Modem Theory of Operation Table 3-4. Reed-Solomon Codes Type of Data Rate R-S Code (n, Bandwidth Expansion Interleaving Maximum 2 R-S Codec Service (Kbps) k, t) 1 [ (n/k) -1 ] Depth Delay (ms) Small IDR 64 (126, 112, 7) 0.125 4 115 (With 16/15 128 (126, 112, 7) 0.125 4 58 O/H) 256 (126, 112, 7) 0.125 4 29 384 (126, 112, 7) 0.125 4 19 512 (126, 112, 7) 0.125 4 15 768 (126, 112, 7) 0.125 4 10 1024 (126, 112, 7) 0.
DMD2050E Universal Satellite Modem Theory of Operation rate through the modem. The overhead channel is recovered at the far end. This added channel is termed variously “An Overhead Channel”, ”Service Channel”, “Async Channel” or in IESS terminology an “ES to ES Data Channel.” The basic frame structure used by the multiplexer is that specified in the IESS-309 Standard, resulting in a 16/15 Aggregate t0 through-Data Ratio.
DMD2050E Universal Satellite Modem Kbps 3.16 Theory of Operation Standard IBS Baud Rate Example Kbps Enhanced Mode Baud Rate Example 896 19200 960 19200 1024 19200 1088 19200 1152 19200 1216 19200 1280 19200 1344 19200 1408 19200 1472 19200 1536 19200 1600 19200 1664 19200 1728 19200 1792 19200 1856 19200 1920 19200 1984 19200 2048 19200 Standard IBS Mode In the first or “Normal” mode, all bit assignments are per the IBS standard.
DMD2050E Universal Satellite Modem Theory of Operation The ratio of the Through Terrestrial Data Channel Rate to the aggregate rate is 15/16. The standard transmit and receive channels of the ES to ES Data Channel in Standard IBS Mode are raw channels operating at the specific bit rate as controlled by the data channel rate, without buffering. In addition, no clocks are provided with this channel.
DMD2050E Universal Satellite Modem Theory of Operation The user can connect whichever systems on the earth stations that they desire to these Backward Alarms Relays as long as they will supply ground to the Backward Alarm Relay Input in the “no fault” condition and the ground will be removed in the “faulted” condition.
DMD2050E Universal Satellite Modem Theory of Operation The number of user data slots and control words per frame is selected by the SCC Control Ratio Parameter. This can be any value from 1 to 1 through 1 to 7. A higher ratio allows a lower overhead rate but since there are less Sync Words, there is a higher acquisition time. The following examples show a control ratio of 1 to 3 and 1 to 1.
DMD2050E Universal Satellite Modem 3.19.2 Theory of Operation Aggregate Data Rate The aggregate data rate equals the following: User Data Rate + In-Band Rate + Synchronizing Overhead Rate Because SCC must adjust the overhead so that there are an equal number of user data bits in each slot, the synchronizing overhead cannot be easily calculated. However, dividing the In-Band Rate by the Control Ratio can approximate it.
DMD2050E Universal Satellite Modem 3.19.3 Theory of Operation Overhead Rate Comparison The SCC Overhead Ratio varies depending on the User Data Rate, the In-Band Rate, and the Control Ratio. This gives SCC the advantage of lower overhead rates when compared to IBS, which has a fixed overhead ratio of 16/15 or 1.067. The following table gives some example overhead rates for different user data and control ratios.
DMD2050E Universal Satellite Modem 3.19.4 Theory of Operation Actual Overhead Rate Calculation The following is the actual calculation the modem does to calculate the overhead ratio: 1. The modem calculates the minimum in-band rate to limit the size of the user data slots to 2,500 bits (the result is truncated to an integer). Minimum In-Band = (User Data Rate * Control Ratio)/((Control Ratio + 1) * 250) 2.
DMD2050E Universal Satellite Modem 3.20 Theory of Operation SCC OVERHEAD CHANNEL SETUP 1. Set the Framing Mode (located under Mod and Demod Data Menus) to SCC. After doing this, two new menus will appear to the right of the Framing Menu, for both the Mod and Demod. The new menus will be: SCC CTL RATIO SCC INBAND RATE 2.
DMD2050E Universal Satellite Modem Theory of Operation 9. The physical connection to the DMD2050E for the overhead channel will be the DB-9 Female Port labeled ASYNC (J17). SCC Overhead Chart Examples (Viterbi 3/4 w/V.35 Scrambler) Modem Data Rate Kbps SCC Control Channel Rate In-Band Overhead Rate Setting Symbol Rate 9.6 1/1 300 6800 9.6 1/2 300 6700 9.6 1/3 300 6667 9.6 1/4 300 6650 9.6 1/5 300 6641 9.6 1/6 300 6634 9.6 1/7 300 6629 9.6 1/1 9600 19200 9.
DMD2050E Universal Satellite Modem 3.21 Theory of Operation Locating the DMD2050E ID Code Operational Procedure Unique ID codes let you add feature upgrades to the unit. You do not have to return the unit to the factory. After you purchase new features, Comtech EF Data gives you a new ID code. Enter the new ID code into the unit to activate the new features. Find the unique ID Code: 1. Make sure that the unit is on. 2. Use the Arrow Keys ()on the front panel to go to the System Menu.
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Chapter 4. User Interfaces 4.1 User Interfaces The DMD2050E has three interfaces available for typical operations: 4.2 • Front Panel • Remote Port • Terminal Front Panel Interface Figure 4-1 shows the front panel. Table 4-1 describes each of the functional areas: • Vacuum Fluorescent Display (VFD) • Arrow Keys • Numeric Keys • LED Lights VFD Arrow Keys Numeric Keys LED Lights Figure 4-1.
DMD2050E Universal Satellite Modem User Interfaces Table 4-1. Front Panel Functions Area Function VFD Shows operating parameters and configuration data Arrow Keys Controls the up, down, right and left cursor position on the display Numeric Keys Allows entry of data LED Lights Shows the status of the unit, see section 4.2.4. 4.2.1 VFD - Vacuum Fluorescent Display The VFD is a 2-line by 16-character vacuum fluorescent display.
DMD2050E Universal Satellite Modem Parameter Type IP Address Text Strings User Interfaces 0–9 Change Digit Increase Digit Decrease Digit Change Increase Character Character Move Move left right Decrease Move Move Character left right Clear & Clear & N/A N/A Clears left of cursor inclusive Clears right of cursor inclusive 4.2.4 LED Lights LED lights on the front panel show the status of the unit.
DMD2050E Universal Satellite Modem 4.3 User Interfaces Parameter Setup 4.3.1 Select a Parameter Use the arrow keys to move through the menus. To select a parameter, press ENTER. The first space of the parameter flashes to show it is selected. Figure 4-2. Enter New Parameters 4.3.2 Enter and Save a New Parameter Use the numeric keys to enter new data into the parameter. Press ENTER to save the new data. 4.3.3 Change a New Parameter Before Saving To make changes before you press ENTER, press CLEAR.
DMD2050E Universal Satellite Modem User Interfaces 4.4.1 MODULATOR Main Menu and Parameters 4.4.1.1 NETWORK SPEC (menu) The NETWORK SPEC command activates a group of preset parameters. These preset parameters help reduce keystrokes and potential compatibility problems. NETWORK SPEC {MIL 188-165A, EBEM, IDR, IBS, DROP & INSERT, CLOSED NET, DVB} NETWORK SPECS and data rates must be compatible. If you set data rates first, the system allows only the applicable NETWORK SPEC.
DMD2050E Universal Satellite Modem 4.4.1.2 User Interfaces STRAP CODE The STRAP CODE is another means for quickly setting several parameters at one time. STRAP CODE parameters include: • Data Rate • Inner Code Rate • Satellite Framing • Scrambler • Drop and Insert • Outer Code Rate (Reed-Solomon) • Modulation • Network Spec See Appendix I, Strap Codes for more data. 4.4.1.
DMD2050E Universal Satellite Modem User Interfaces DATA MENU Trellis (8PSK) {2/3} TPC (BPSK) {5/16, 21/44} ≤ 20Mbps TPC (OQPSK/QPSK) {1/2, 3/4, 7/8} ≤ 20Mbps TPC (8PSK/8QAM) {3/4, 7/8} TPC (16QAM) {3/4, 7/8} DVB VIT {2/3, 5/6} DVB Trellis {3/4, 5/6, 7/8, 8/9} LDPC (B/O/QPSK) {1/2, 2/3, 3/4} LDPC (8PSK/8QAM) {2/3, 3/4} LDPC (16QAM) {3/4} Turbo (B/Q/8/16APSK) {1/2, 2/3, 3/4, 7/8, 19/20, None} IFEC INTERLEAVER {DISABLE, ENABLE} Disable or enable the IFEC Interleaver.
DMD2050E Universal Satellite Modem User Interfaces DATA MENU TERR FRAMING {NONE, 188, 204} DVB Only DATA POLARITY {INV. TERR & BASE, INV. Invert the Tx Data polarity. BASEBAND, INV.TERR DATA, NONE} BPSK SYMBOL PAIR {NORMAL, SWAPPED} BPSK Mode Only Swap the I & Q Channels. ESC OVERHEAD {VOICE X2, DATA 64KBPS} IDR ESC Channel is used for Voice or 64 K data channel. 4.4.1.4.
DMD2050E Universal Satellite Modem 4.4.1.5 User Interfaces REED-SOLOMON (menu) IMPORTANT When Reed-Solomon is selected, these parameters are available. ENABLE/DISABLE {ENABLED, DISABLE} Enable or disable the Reed-Solomon Encoder. RS RATE {Refer to Table 3-1 for valid Displays the currently used n, k Reed-Solomon Codes. In n/k values} Closed Net Mode, you can select custom R-S Codes. {4, 8, 12} Select the Reed-Solomon interleaver depth.
DMD2050E Universal Satellite Modem 4.4.1.7 User Interfaces LOCAL AUPC (menu) NOTE When modems are configured for Radyne AUPC, the remote Eb/No is displayed in the Monitor Menus. LOCAL AUPC MENU AUPC MODE {DISABLED, NEAR SIDE, RADYNE, EFDATA} DISABLED: Enable or disable the Local AUPC Function of the local modem. EBEM: Enables EBEM Local AUPC Function. In the event the remote demodulator losses lock, the local output power level will adjust itself to the nominal level.
DMD2050E Universal Satellite Modem User Interfaces LOCAL AUPC MENU MINIMUM TX POWER {0 to -45 dB} Set the minimum Transmit Power. EBEM: When configured for EBEM AUPC, the minimum Transmit Power is the lowest power setting that will be used when the remote modem commands a decrease of the Transmit Power from the Local modem.
DMD2050E Universal Satellite Modem User Interfaces LOCAL AUPC MENU TARGET Eb/No {4.0 to 16 dB} Set the desired Eb/No for the local receiver. RADYNE AUPC: When configured for Radyne AUPC, this setting is compared against the remote Eb/No and commands to the local modem to increase or decrease the local transmit power. EF AUPC: When configured for EF AUPC, this setting is compared against the local received Eb/No and commands to the remote modem to increase or decrease transmit power.
DMD2050E Universal Satellite Modem 4.4.1.8 User Interfaces REMOTE AUPC (menu) NOTE Remote AUPC Menus are available only when the modem is configured for EF AUPC. REMOTE AUPC MENU AUPC MODE {DISABLE,NEAR SIDE, Enable or disable the AUPC Function of the remote modem. The EFDATA} remote AUPC Function is the response of the local modem to commands for an increase or decrease of the Transmit Power in 0.
DMD2050E Universal Satellite Modem User Interfaces 8PSK 2/3 {NOT SELECTED, SELECTED} Used to select the mod/code rate 8PSK 3/4 {NOT SELECTED, SELECTED} Used to select the mod/code rate 8PSK 7/8 {NOT SELECTED, SELECTED} Used to select the mod/code rate 8PSK 19/20 {NOT SELECTED, SELECTED} Used to select the mod/code rate 16APSK 1/2 {NOT SELECTED, SELECTED} Used to select the mod/code rate 16APSK 2/3 {NOT SELECTED, SELECTED} Used to select the mod/code rate 16APSK 3/4 {NOT SELECTED, SELECT
DMD2050E Universal Satellite Modem Closed Net User Interfaces All possible combinations are allowed. NOTE: DVB settings require the DVB NETWORK SPEC and EBEM settings require the EBEM NETWORK SPEC. 4.4.2.2 STRAP CODE The STRAP CODE is another means for quickly setting several parameters at one time.
DMD2050E Universal Satellite Modem User Interfaces IF MENU INPUT THRESHOLD {-30 to –90} (dBm) Sets the minimum carrier receive level when a carrier drops below this level. The modem will sweep and try to acquire a new signal. This prevents extremely small carriers from falsely locking the modem. EB/NO ALARM {0.0 – 9.9 dB} Select an EB/NO level that will trigger an alarm when the received EB/NO is worse. 4.4.2.
DMD2050E Universal Satellite Modem User Interfaces DATA MENU SCRAMBLER SEL {NONE, V.35-IESS, V.35 CITT, V.35 EF, IBS Select the descrambler type. w/Optional Framing and optional ReedSolomon, Reed-Solomon Scrambler w/Optional Framing, CCITT, V.35FC, OM-73, V.35EF_RS, TPC SCRAMBLER (Turbo Codec), DVB, EDMAC, EBEM} SCRAMBLER CTRL {ENABLED, DISABLE} Enable or disable the descrambler operation. SAT FRAMING {1/15 (IBS), 1/15 (Async), 96 Kbps (IDR), Select the Framing Type.
DMD2050E Universal Satellite Modem 4.4.2.6 User Interfaces CNC (menu) IMPORTANT When the Carrier-in-Carrier® option is installed, these parameters are available. Enable/Disable {Enabled, Disabled} MIN SRCH DELAY {Minimum Search Delay (ms), 0 to Max} MAX SRCH DELAY {Maximum Search Delay (ms), Min to 330ms} FREQ OFFST RNG {Range of Frequency Offset (KHz) between the Enable or disable the CnC. Interferer and the desired received signal. (+/- 1Khz to +/- 32Khz)} 4.4.2.
DMD2050E Universal Satellite Modem User Interfaces 4.4.3 INTERFACE Main Menu and Parameters 4.4.3.1 TX SETUP (menu) TX SETUP MENU CIRCUIT ID Enter a Tx Circuit Identifier. Circuits can be given up to an 11 Character alphanumeric identity such as LINK1. TERR INTERFACE {RS423 SERIAL, M2P PARALLEL, DVB Select the Transmit Interface Type. PARALLEL, G.703 E2, G.703 T2 BAL, G.703 T2 UNBAL, G.703 E1 BAL, G.703 E1 UNBAL, G.703 T1 AMI, G.703 T1 B8ZS, V.
DMD2050E Universal Satellite Modem User Interfaces IMPORTANT When Ethernet Interface is selected or EBEM Network specification is enabled, these parameters are available. ETH FLOW CONTROL ETH DAISY CHAIN {Disabled, Disable or enable flow control. Only visible when Ethernet is selected as Enabled} the interface type. {Disabled, Port Not Available with only one physical port 4} Disable the Ethernet Port Daisy Chaining or enable it on Port 4.
DMD2050E Universal Satellite Modem 4.4.3.1.1 User Interfaces DROP & INSERT (menu) DROP & INSERT MENU DROP MODE {NONE, T1-D4, Select any mode from the list. T1-ESF, PCM-30, PCM-30C, PCM-31, PCM-31C, T1-D4-S, T1-ESF-S.} MAP COPY {SRC Map to Dest Copy drop and insert maps. Tx ACT map is the drop map currently Map} being used by the modem.
DMD2050E Universal Satellite Modem 4.4.3.2 User Interfaces RX SETUP (menu) RX SETUP MENU CIRCUIT ID TERR INTERFACE Enter the Rx Circuit Identifier. Circuits can be as DLINK1 {RS423 SERIAL, M2P Select the Receive Type. PARALLEL, DVB PARALLEL, G.703 E2, G.703 T2 BAL, G.703 T2 UNBAL, G.703 E1 BAL, G.703 E1 UNBAL, G.703 T1 AMI, G.703 T1 B8ZS, V.35, HSSI, ASI, ETHERNET, MIL-188-114A} BUFF SIZE (msec) {0 - 64 msecs} Allows the user to set the Doppler Buffer Size in msec.
DMD2050E Universal Satellite Modem 4.4.3.2.1 User Interfaces DROP & INSERT (menu) INSERT MODE {NONE, T1-D4, Select any mode from the list. T1-ESF, PCM-30, PCM-30C, PCM-31, PCM-31C, T1-D4-S, T1-ESF-S.} T1/E1 FRAME SRC {INTERNAL, Selects the frame source for T1 or E1 framing. EXTERNAL, Note: IDI/DDO loop is an internal loopback of the terrestrial clocks not IDI/DDO to be used simultaneously with external loopback cable. LOOPBACK} MAP COPY {TxACT, RxACT, Copy drop and insert maps.
DMD2050E Universal Satellite Modem 4.4.3.3 User Interfaces GENERAL (menu) GENERAL MENU EXT FREQ (MHz) {Variable Through Data Rate} Select the external clock frequency in MHz. REF FREQ SRC {EXTERNAL, HIGH STABILITY} Select the Frequency Reference Source. REF FREQ (MHz) BB RELAYS Select the reference clock frequency in MHz. {IBS ALMs, IBS/MNR ALMs, IBS ALMs: Only supports IBS prompt and service alarms.
DMD2050E Universal Satellite Modem User Interfaces MONITOR MENU CORRECTED BER The CBER display shows an estimated corrected bit error rate of the modem. Depending on the symbol rate the modem is running, the high-end performance scale of this display will vary (10 E-9, 10-10 or 10-11). At some symbol rates, a better than scale reading will appear as 0.0 x 10-00. At other symbol rates, it will appear as E**. In either case, they both mean performance is better than the scale upper limit.
DMD2050E Universal Satellite Modem User Interfaces NOTE Port status indicators are: MN-DMD2050E Revision 2 Down: The link is down. Unresolved: Unable to agree on connection speed. 10 Mbps Half: Connected at 10 Base-T Half Duplex. 10 Mbps Full: Connected at 10 Base-T Full Duplex. 100 Mbps Half: Connected at 100 Base-T Half Duplex. 100 Mbps Full: Connected at 100 Base-T Full Duplex. Not used: The port is not available.
DMD2050E Universal Satellite Modem 4.4.4.2 User Interfaces VOLTAGES (menu) VOLTAGES MENU TEMPERATURE Displays internal temperature. +1.5V RX SUPPLY Displays the measured voltage of the 1.5 Volt Rx power bus located inside the modem. +1.5V TX SUPPLY Displays the measured voltage of the 1.5 Volt Tx power bus located inside the modem. +3.3V SUPPLY Displays the measured voltage of the +3.3 Volt power bus located inside the modem.
DMD2050E Universal Satellite Modem User Interfaces 4.4.5 ALARMS Main Menu and Parameters Alarm details are described in Chapter 6, Maintenance and Troubleshooting. CAUTION Masked alarms can cause unwanted effects in the performance of the unit. CURRENT See Chapter 6, Maintenance and Troubleshooting for more data about alarms. LATCHED These alarms are latched to catch intermittent failures: BACKWARD Backward alarms are alarms that are fed back to or received from the other end of the satellite link.
DMD2050E Universal Satellite Modem 4.4.6.3 User Interfaces TERMINAL (menu) TYPE {VT-100, WYSE50, VIEWPOINT} Select the emulation type. BAUD RATE {150, 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, Enter the terminal baud rate. 57600, 115200} 4.4.6.4 ADDRESS REMOTE PORT (menu) {32 - 255} Enter the Remote Port Multidrop Address. BAUD RATE {150, 300, 600, 1200, 2400, 4800, 9600, 19200, 38,400, Enter the Remote Port Baud Rate.
DMD2050E Universal Satellite Modem User Interfaces TCP/IP MENU BOOTp SERVER {128 – 257, Only used if Bootp is selected in Boot Mode. Should be consistent default is 206} with the tag expected by the users Bootp Server. MODEM HOST IP ADDR MASK The Host Modem for the network. {XXX.XXX.XXX.XXX} The IP Address Mask of the local network. The mask is expressed in a hexadecimal format, and must be a valid TCP/IP Mask. This field should be set before changes are made to the Modem or Router Address.
DMD2050E Universal Satellite Modem 4.4.6.6 User Interfaces SNMP (menu) A description of OID organization is provided in the MIB portion of this manual (Appendix C). SNMP MENU SNMP VERSION {V1 & V2, V3} This selection controls the SNMP Version that will be used in messaging between the equipment and it’s host. When V1 & V2 is used, RD COMMUNITY and RDWR COMMUNITY are used to determine the authorization of an incoming message. When V3 is used, three contexts are supported: public, mib2, and dev.
DMD2050E Universal Satellite Modem 4.4.6.7 PORT User Interfaces FTP (menu) {XXXX} Select the desired port number. Factory default is set to 21. Port 21 is a reserved port utilized by the File Transfer Protocol for FTP control traffic. USER ID Enter the user identification for access to an FTP session. PASSWORD Enter the password for access to an FTP session. 4.4.6.
DMD2050E Universal Satellite Modem 4.4.6.9 User Interfaces TRANSEC (menu) TRANSEC MENU IP ADDR MASK {XXX.XXX.XXX.XXX} The IP Address Mask of the TRANSEC Module. The mask is expressed in a hexadecimal format, and must be a valid TCP/IP Mask. This field should be set before changes are made to the Modem or Router Address. MODEM IP ADDR {XXX.XXX.XXX.XXX} The IP Address of the TRANSEC Module. This address should be consistent for the mask defined. This address is expressed in hexadecimal format.
DMD2050E Universal Satellite Modem 4.4.6.10.1 User Interfaces MAIN BOARD (menu) NOTE Only the applicable VCO adjustment screens are displayed. IMPORTANT These fields are protected to prevent accidental changes. To change a field, press all four arrow keys at the same time. INT VCO ADJUST {0% - 100%} Adjusts the internal frequency reference for calibration. Only displayed of the system reference clock is INTERNAL.
DMD2050E Universal Satellite Modem User Interfaces CNC BOARD (menu) Indicates the part number for the CNC Board. DEBUG MODE {ENABLED, DISABLED} CNC DEBUG REGS1 Used for factory test only. CNC DEBUG REGS2 Used for factory test only. CNC DEBUG REGS3 Used for factory test only. CNC DEBUG REGS4 Used for factory test only. SCALE AMPLTD Used for factory test only. AR THRESH FACTOR Used for factory test only. PLL LOOP THRESH Used for factory test only.
DMD2050E Universal Satellite Modem User Interfaces 4.4.7 TEST Main Menu and Parameters TEST MENU TX TEST PATTERN {NONE, 2047, 2^15-1, 2^23-1} Enables the tests listed above. RX TEST PATTERN {NONE, 2047, 2^15-1, 2^23-1} Enables the tests listed above. PATTERN SYNC {YES, NO} Yes indicates that the RX Test Pattern is in sync. TST PAT ERR CNT {NO SYNC, nnnn x 10n} Displays the number of errors detected by the test pattern checker.
DMD2050E Universal Satellite Modem User Interfaces TEST MENU IQ SAMPLING {ENABLE/DISABLE} Enables the I & Q pattern on the Web Browser Interface. IQ SPCTRM SMPLING {ENABLE, DISABLE} Enables the Frequency Spectrum pattern on the Web Browser.
DMD2050E Universal Satellite Modem 4.5 User Interfaces Terminal Mode Control The Terminal Mode Control lets you use an external terminal or computer to monitor and control the unit. Typically, the Control Port is the RS–232 Serial Interface connection to the terminal device. In Terminal Mode Control, the unit shows a full-screen, interactive display using built-in software. The only external software that is required is VT-100 Terminal Emulation Software.
DMD2050E Universal Satellite Modem User Interfaces For numerical input, use the number keys to input the data. Press ENTER to save the data. To cancel numerical input before you save it, press ESC. NOTE Using an invalid input key causes the terminal to show an error message. 4.5.3 Setup for Terminal Mode NOTE When you use the terminal for the first time, use the $ (dollar) character to reset the memory. 1.
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Chapter 5. External Connections Figure 5-1. DMD2050E Universal Satellite Modem Front Panel Figure 5-2. DMD2050E Rear Panel Figure 5-3.
DMD2050E Universal Satellite Modem 5.1 External Connections Power Connectors, Ground and Switches The DMD2050E units have either AC or DC power connectors (see Figure 5-3). Power Type Location Prime Power Maximum Power Consumption AC Rear panel 100 – 240 VAC, 50 – 60 Hz 1A DC Rear panel 48V ± 5VDC 3A Table 5-1. Pinouts for DC Power Connector Pin Description A – B Ground C + 5.1.1 Ground Connector A chassis ground connector (#10-32 threaded stud), is adjacent to the power connector.
DMD2050E Universal Satellite Modem 5.2 External Connections Front Panel Connections 5.2.1 Key Loader Interface Label Location Description Connector Type SKL Front Panel Key Loader Interface Port RS-232, 6-pin audio connector (GC283) Connect a hand-held PC to the Key Loader Interface to upload the Shared Message Authentication Token (SMAT) to the modem. See the MN-DMD2050E-TKL manual for more information Table 5-2.
DMD2050E Universal Satellite Modem 5.3 External Connections Rear Panel Connectors CAUTION Before you connect any cable to the unit, examine the connector labels. Make sure to use the correct mating connector when you connect a cable to the unit. 5.3.1 HSSI / Ethernet Connectors Label Description Connector Type Notes HSSI J1 High-Speed Serial 50-pin SCSI-2 1.
DMD2050E Universal Satellite Modem External Connections 5.3.2 EXT REF (J10) Label Description Connector Type EXT REF J10 External Reference Port 50 Ohm Female BNC Input Levels Frequencies (MHz) 0.3 to 5 Vpp 1.0 (Sine or Square wave) 1.544 2.0 2.048 5.0 10.0 5.3.
DMD2050E Universal Satellite Modem External Connections 5.3.4 ALARM (J15) Label Description Connector Type ALARM J15 Alarm Port 15-pin Female D The Alarm port uses contact closures to identify the status of the unit. Pins 1 through 6 supply Form C contacts for major alarm status on the modulator and demodulator. Normally Open or Normally Closed conditions indicate a FAULTED or OFF state. • C = Closed • NO = Normally Open • NC = Normally Closed Table 5-4.
DMD2050E Universal Satellite Modem 5.3.4.1 5.3.4.
DMD2050E Universal Satellite Modem External Connections 5.3.6 ASYNC (J17) Label Description Connector Type ASYNC J17 Asynchronous Data Interface Port 9-pin Female D Table 5-5. Pinouts for J17 ASYNC Port 9-pin Female D Connector Pin No.
DMD2050E Universal Satellite Modem 5.3.8 External Connections MIL-188-114A (J19) Label Description Connector Type MIL-188-114A J19 EIA-530 Port (RS-422) 25-pin Female D Table 5-6. Pinouts for J19 MIL-188-114A Port 25-pin Female D Connector Pin No.
DMD2050E Universal Satellite Modem External Connections 5.3.9 Monitor and Control Connectors J20, J21 Label Description Connector Type REMOTE J20 Remote Monitor and Control Port (RS-485 or RS-232) 9-pin Female D ETHERNET J21 Ethernet Monitor and Control Port Female RJ-45 Table 5-7. Pinouts for J20 REMOTE Port (RS-485 or RS-232) 9-pin Female D Connector Pin No.
Chapter 6. Maintenance and Troubleshooting 6.1 Periodic Maintenance 6.1.1 Battery Replacement WARNING: DANGER OF EXPLOSION if the battery is incorrectly replaced. The unit contains a Lithium Battery. Replace it with an equivalent battery that is specified by the manufacturer. Dispose of used batteries in compliance with local and national regulations. 6.1.2 Clock Adjustment Adjust the clock only when an internal clock source is not accurate. Adjust internal VCO speed from the front panel. 6.1.
DMD2050E Univeral Satellite Modem 6.2 Maintenance and Troubleshooting Troubleshooting 6.2.1 Basic Troubleshooting Procedures 1) Make sure all interface signals are correct. 2) If the unit is not operating correctly, replace it with an equivalent unit that is known to operate correctly. 3) If replacing the unit does not correct the problem, examine the power supply and electrical wiring for problems. 6.2.2 Troubleshooting Symptoms and Causes 6.2.2.
DMD2050E Univeral Satellite Modem 6.3 Maintenance and Troubleshooting Alarms 6.3.1 Major Transmit Alarms Alarm Description Status FPGA CFG A transmit FPGA hardware failure exists. {Pass/Fail, Unmasked/Masked} DSP CFG A transmit FPGA failure exists. {Pass/Fail, Unmasked/Masked} SCT Clock PLL The Tx SCT Clock PLL is not locked. This alarm flashes on {Pass/Fail, during certain parameter changes.
DMD2050E Univeral Satellite Modem Maintenance and Troubleshooting Alarm Description Status INPUT LVL THRESH Indicates the Rx level has fallen below the input threshold level. {Pass/Fail, Marked/Unmarked} FRAME LOCK The Framing Unit cannot find the expected framing pattern. {Pass/Fail, Unmasked/Masked} MULTIFRAME LOCK The Framing Unit cannot find the expected framing pattern. {Pass/Fail, Unmasked/Masked} LB SYNTH PLL The Rx L-Band Synthesizer is not locked.
DMD2050E Univeral Satellite Modem Maintenance and Troubleshooting Alarm Description Status TPC CONFLICT CHK Indicates that the TPC parameters are not configured correctly. {Pass/Fail, (only visible when TPC enabled) Unmasked/Masked} 6.3.3.1 Minor Rx Alarms Alarm Description Status BUFF UNDERFLOW A Doppler Buffer underflow occurred. {Pass/Fail, Unmasked/Masked} BUFF NEAR EMPTY The Doppler Buffer is about to underflow.
DMD2050E Univeral Satellite Modem Maintenance and Troubleshooting Alarm Description Status RX AGC LEVEL Indicates Rx level is below allowable limits. {Pass/Fail, Unmasked/Masked} IBS BER More than 1 in 1000 bits in error exist in IBS mode. {Pass/Fail, Unmasked/Masked} RX DVB FRAME LOCK The Rx Satellite Data Stream Framing is not DVB. {Pass/Fail, Unmasked/Masked} EMBEDDED CHAN 6.3.3.
DMD2050E Univeral Satellite Modem Maintenance and Troubleshooting Alarm Description Status +3.3V SUPPLY Shows the measured voltage of the +3.3 Volt power bus {Pass/Fail, inside the modem. Unmasked/Masked} Shows the measured voltage of the +5 Volt power bus inside {Pass/Fail, the modem. Unmasked/Masked} Shows the measured voltage of the +12 Volt power bus inside {Pass/Fail, the modem. Unmasked/Masked} Shows the measured voltage of the +20 Volt power bus inside {Pass/Fail, the modem.
DMD2050E Univeral Satellite Modem 6.4 Maintenance and Troubleshooting Alarm Masks The DMD2050E self-monitors and isolates faults. Alarms for these faults are categorized as: Active Alarms Common Equipment Alarms Backward Alarms CAUTION Masked alarms can cause unwanted effects in the performance of the unit. You can mask certain alarms. Masking alarms can be helpful during debugging, or when you need to to lock out a known failure.
DMD2050E Univeral Satellite Modem Maintenance and Troubleshooting Alarms are grouped into transmit and receive alarms. Transmit and receive alarms are completely independent of each other. 6.4.2 Common Equipment Alarms Common equipment alarms occur when the unit has problems that affect both transmit and receive operations. Most common equipment alarms occur when there is a hardware failure in the unit, such as a malfunctioning power supply.
DMD2050E Univeral Satellite Modem RX MAJOR (menu) Maintenance and Troubleshooting {Pass/Fail} RX MINOR (menu) MULTIFRAME LOCK SAT AIS LB SYNTH PLL DnI FRAME LOCK IF SYNTH PLL DnI M-FRAME LOCK ETHERNET WAN INSERT CRC {Pass/Fail} T1/E1 SIGNALING IFEC LOCK TPC CONFLICT CHK OFEC LOCK INTERLEAVER RS UNCORR. WORD EBNO RX AGC LEVEL IBS BER RX DVB FRM LOCK EMBEDDED CHAN COMMON (menu) {Pass/Fail} VOLTAGE (menu) TERR FPGA CFG +1.5V RX SUPPLY CODEC FPGA CFG +1.5V TX SUPPLY CODEC DEV CFG +3.
DMD2050E Univeral Satellite Modem Maintenance and Troubleshooting NOTE These alarms show the status of the alarms RECEIVED FROM the distant satellite end.
DMD2050E Univeral Satellite Modem 6.5 Maintenance and Troubleshooting IBS Alarms and Actions Figure 6-1 and Table 6-1show the IBS alarms and actions to be taken at the earth station, the terrestrial data stream and the satellite. These alarms include those detected on the terrestrial link and those detected from the satellite. Figure 6-1. IBS Alarms Table 6-1.
Chapter 7. Technical Specifications 7.1 Modulator Modulator Specifications Modulation BPSK, QPSK, OQPSK, 8-PSK, 8-QAM, 16-QAM, 16-APSK IF Tuning Range 50 to 90, 100 to 180 MHz in 1 Hz Steps L-Band Tuning Range 950 to 2050 MHz in 1 Hz Steps Impedance IF, 50 Ohm (75 Ohm Optional) L-Band, 50 Ohm Connector TNC, 50 Ohm SMA, 50 Ohm, L-Band Return Loss IF, 1.5:1 L-Band, 2.0:1 Output Power 0 to -40 dBm Output Stability IF, ±0.5 dB Over Frequency and Temperature L-Band, ±.
DMD2050E Universal Satellite Modem Technical Specifications Modulator Specifications Turbo (16-QAM) {3/4, 7/8} ≤ 20Mbps DVB VIT {2/3, 5/6} DVB Trellis {3/4, 5/6, 7/8, 8/9} LDPC (BPSK) {1/2} LDPC (OQPSK/QPSK) {1/2, 2/3, 3/4} LDPC (8-PSK/8-QAM) {2/3, 3/4} LDPC (16-QAM) {3/4} STANAG Turbo (B/QPSK) {1/2, 2/3, 3/4, 7/8, 19/20, None} STANAG Turbo (8-PSK) {1/2, 2/3, 3/4, 7/8, 19/20, None} STANAG Turbo (16-APSK) {1/2, 2/3, 3/4, 7/8, 19/20, None} Outer Encoder Options Reed-Solomon INTELSAT (DV
DMD2050E Universal Satellite Modem Technical Specifications Demodulator Specifications Turbo (OQPSK/QPSK) {1/2, 3/4, 7/8} ≤ 20Mbps Turbo (8-PSK/8-QAM) {3/4, 7/8} ≤ 20Mbps Turbo (16-QAM) {3/4, 7/8} ≤ 20Mbps DVB VIT {2/3, 5/6} DVB Trellis {3/4, 5/6, 7/8, 8/9} LDPC (BPSK) {1/2} LDPC (OQPSK/QPSK) {1/2, 2/3, 3/4} LDPC (8-PSK/8-QAM) {2/3, 3/4} LDPC (16-QAM) {3/4} STANAG Turbo (B/QPSK) {1/2, 2/3, 3/4, 7/8, 19/20, None} STANAG Turbo (8-PSK-PSK) {1/2, 2/3, 3/4, 7/8, 19/20, None} STANAG Turbo
DMD2050E Universal Satellite Modem 7.5 Technical Specifications Terrestrial Interfaces MIL-188-114A, HSSI GiGE 10/100/1000 Base-T 7.6 IBS/Synchronous Interface (Standard) MIL-188-144A/RS-422/-530 7.7 All Rates, Differential, Clock/Data, DCE High-Speed Serial Interface (HSSI) & Gigi Ethernet Data Interface HSSI HSSI, Serial, 50-Pin SCSI-2 Type Connector (Female) Ethernet Data Interface One RJ-45, Auto-Crossover, Auto-Sensing, 10/100/1000 Ethernet Data Ports. Complies with IEEE 802.3 and IEEE 802.
DMD2050E Universal Satellite Modem Technical Specifications 7.11 Data Rate Limits 7.11.
DMD2050E Universal Satellite Modem Technical Specifications Non-DVB Data Rate Limits Modulation Code Rate Min Data Rate Max Data Rate OQPSK NONE 9600 20000000 OQPSK VIT 1/2 4800 20000000 OQPSK VIT 3/4 7200 20000000 OQPSK VIT 7/8 8400 20000000 OQPSK SEQ 1/2 4800 2048000 OQPSK SEQ 3/4 7200 2048000 OQPSK SEQ 7/8 8400 2048000 OQPSK TPC 1/2 4582 9545454 OQPSK TPC 3/4 7200 15000000 OQPSK TPC 7/8 8400 17500000 OQPSK LDPC 1/2 18000 10000000 OQPSK LDPC 2/3 24000 1
DMD2050E Universal Satellite Modem 7.11.
DMD2050E Universal Satellite Modem Technical Specifications DVB Data Rate Limits Modulation Code Rate DVB Mode Min Data Rate Max Data Rate 8-PSK TRE 8/9 187 Mode 11550 20000000 8-PSK 188 Mode 11797 20000000 8-PSK 204 Mode 12800 20000000 187 Mode 13200 20000000 16-QAM 188 Mode 13271 20000000 16-QAM 204 Mode 14400 20000000 187 Mode 15400 20000000 16-QAM 188 Mode 15483 20000000 16-QAM 204 Mode 16800 20000000 16-QAM 16-QAM MN-DMD2050E Revision 2 TRE 3/4 TRE 7/8 7–8
DMD2050E Universal Satellite Modem Technical Specifications 7.12 BER Specifications 7.12.1 BER Performance (Viterbi) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Viterbi Decoder 1E-3 Typical Performance BER 1E-4 1E-5 1E-6 Specification 1/2 Rate Specification 3/4 Rate 1E-7 Specification 7/8 Rate 1E-8 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Figure 7-1. DMD2050E B/O/QPSK BER Performance (Viterbi) Note: Eb/No values include the effect of using differential decoding and v.
DMD2050E Universal Satellite Modem 7.12.2 Technical Specifications BER Performance (Sequential) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Sequential Decoder Typical Performance 1E-3 BER 1E-4 1E-5 1E-6 Specification 1/2 Rate 1E-7 Specification 3/4 Rate 1E-8 1E-9 Specification 7/8 Rate 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Figure 7-2. DMD2050E B/O/QPSK BER Performance (Sequential) Note: Eb/No values include the effect of using differential decoding and v.35 descrambling.
DMD2050E Universal Satellite Modem 7.12.3 Technical Specifications BER Performance (Viterbi with Reed-Solomon) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Typical Performance Viterbi Decoder Reed Solomon 1E-3 BER 1E-4 1E-5 1E-6 Specification 1/2 Rate 1E-7 Specification 7/8 Rate Specification 3/4 Rate 1E-8 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Figure 7-3.
DMD2050E Universal Satellite Modem 7.12.4 Technical Specifications BER Performance (Turbo) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Turbo Decoder Typical Performance 1E-3 BER 1E-4 1E-5 1E-6 1E-7 Specification Turbo 0.495 1E-8 1E-9 Specification Turbo 0.793 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Figure 7-4. DMD2050E B/O/QPSK BER Performance (Turbo) Note: Eb/No values include the effect of using interleaving and maximum iterations.
DMD2050E Universal Satellite Modem 7.12.5 Technical Specifications BER Performance (8PSK Trellis) 1E-1 8PSK Uncoded Theory Trellis Decoder 1E-2 1E-3 Typical Performance BER 1E-4 1E-5 1E-6 Specification 2/3 Rate 1E-7 Specification 2/3 Rate w/RS 1E-8 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Figure 7-5. DMD2050E 8PSK BER Performance (Trellis) Note: Eb/No values include the effect of using differential decoding and v.35 descrambling.
DMD2050E Universal Satellite Modem 7.12.6 Technical Specifications BER Performance (8PSK Turbo) 1E-1 8PSK Uncoded Theory 1E-2 Turbo Decoder Typical Performance 1E-3 BER 1E-4 1E-5 1E-6 1E-7 1E-8 Specification Turbo 0.793 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Figure 7-6. DMD2050E 8PSK BER Performance (Turbo) Note: Eb/No values include the effect of using interleaving and maximum iterations.
DMD2050E Universal Satellite Modem 7.12.7 Technical Specifications BER Performance (16QAM Viterbi) 1E-1 16QAM Uncoded Theory Viterbi Decoder 1E-2 1E-3 Typical Performance BER 1E-4 1E-5 1E-6 Specification 3/4 Rate 1E-7 Specification 7/8 Rate 1E-8 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Eb/No in dB Figure 7-7. DMD2050E 16QAM BER Performance (Viterbi) Note: Eb/No values include the effect of using differential decoding and v.35 descrambling.
DMD2050E Universal Satellite Modem 7.12.8 Technical Specifications BER Performance (16QAM Viterbi with Reed-Solomon) 1E-1 16QAM Uncoded Theory 1E-2 Viterbi Decoder Reed Solomon Typical Performance 1E-3 BER 1E-4 1E-5 1E-6 Specification 3/4 Rate w/RS 1E-7 Specification 7/8 Rate w/RS 1E-8 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Eb/No in dB Figure 7-8.
DMD2050E Universal Satellite Modem 7.12.9 Technical Specifications BER Performance (16QAM Turbo) 1E-1 16QAM Uncoded Theory 1E-2 Turbo Decoder Typical Performance 1E-3 BER 1E-4 1E-5 1E-6 Turbo 0.495 1E-7 Turbo 0.793 1E-8 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Eb/No in dB Figure 7-9. DMD2050E 16QAM BER Performance (Turbo) Note: Eb/No values include the effect of using interleaving and maximum iterations.
DMD2050E Universal Satellite Modem 7.12.10 Technical Specifications BER Performance (OQPSK Turbo) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Turbo Decoder Specification 3/4 Rate 1E-3 1E-4 BER Specification 1/2 Rate Specification 7/8 Rate 1E-5 1E-6 1E-7 Typical Performance 1E-8 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Figure 7-10.
DMD2050E Universal Satellite Modem 7.12.11 Technical Specifications BER Performance (BPSK Turbo) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Turbo Decoder 1E-3 BER 1E-4 Specification 21/44 Rate 1E-5 Specification 5/16 Rate 1E-6 1E-7 Typical Performance 1E-8 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Figure 7-11.
DMD2050E Universal Satellite Modem 7.12.12 Technical Specifications BER Performance (8PSK Turbo) 1E-1 8PSK Uncoded Theory 1E-2 Turbo Decoder Specification 3/4 Rate 1E-3 Specification 7/8 Rate 1E-4 BER Typical Performance 1E-5 1E-6 1E-7 1E-8 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Figure 7-12.
DMD2050E Universal Satellite Modem 7.12.13 Technical Specifications BER Performance (16QAM Turbo) 1E-1 16QAM Uncoded Theory Turbo Decoder 1E-2 Specification 3/4 Rate Specification 7/8 Rate 1E-3 1E-4 BER Typical Performance 1E-5 1E-6 1E-7 1E-8 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Eb/No in dB Figure 7-13.
DMD2050E Universal Satellite Modem 7.12.14 Technical Specifications B/O/QPSK BER Performance (LDPC) 1E-1 B/O/QPSK Uncoded Theory 1E-2 LDPC Decoder 1E-3 Specification 1/2 Rate Specification 2/3 Rate 1E-4 BER Specification 3/4 Rate 1E-5 Typical Performance 1E-6 1E-7 1E-8 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Figure 7-14.
DMD2050E Universal Satellite Modem 7.12.15 Technical Specifications 8PSK / 8QAM BER Performance (LDPC) 1E-1 8PSK Uncoded Theory 1E-2 LDPC Decoder 1E-3 BER 1E-4 Typical Performance 8QAM Rate 2/3 Specification 1E-5 8PSK Rate 2/3 Specification 1E-6 8PSK/8QAM Rate 3/4 Specification 1E-7 1E-8 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Figure 7-15.
DMD2050E Universal Satellite Modem 7.12.16 Technical Specifications 16QAM BER Performance (LDPC) 1E-1 16QAM Uncoded Theory 1E-2 LDPC Decoder 1E-3 1E-4 BER Typical Performance Specification 3/4 Rate 1E-5 1E-6 1E-7 1E-8 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Figure 7-16.
DMD2050E Universal Satellite Modem 7.12.17 Technical Specifications BER Performance B/O/QPSK (MILSTD 188-165B or STANAG) Turbo 1E-1 B/O/QPSK Uncoded Theory Specification 1/2 Rate 1E-2 Specification 2/3 Rate MILSTD 188-165B or STANAG Decoder 1E-3 Specification 3/4 Rate Specification 7/8 Rate 1E-4 BER Specification 19/20 Rate 1E-5 1E-6 1E-7 1E-8 Typical Performance 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Figure 7-17.
DMD2050E Universal Satellite Modem 7.12.18 Technical Specifications BER Performance 8-PSK (MILSTD 188-165B or STANAG) Turbo 1E-1 Specification 1/2 Rate 8PSK Uncoded Theory MILSTD 188-165B or STANAG Decoder Specification 2/3 Rate 1E-2 Specification 3/4 Rate Specification 7/8 Rate 1E-3 Specification 19/20 Rate BER 1E-4 1E-5 1E-6 1E-7 1E-8 Typical Performance 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Figure 7-18.
DMD2050E Universal Satellite Modem 7.12.19 Technical Specifications BER Performance 16APSK (MILSTD 188-165B or STANAG) Turbo 1E-1 Specification 1/2 Rate 16QAM Uncoded Theory Specification 2/3 Rate MILSTD 188-165B or STANAG Decoder Specification 3/4 Rate 1E-2 Specification Specification 7/8 Rate 19/20 Rate 1E-3 BER 1E-4 1E-5 1E-6 1E-7 1E-8 Typical Performance 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Figure 7-19.
DMD2050E Universal Satellite Modem BER 1E-3 1E-4 1E-5 1E-6 1E-7 1E-8 1E-9 1E-10 Table 7-1 - B/O/QPSK BER Performance (Viterbi) Specification Typical 1/2 Rate 3/4 Rate 7/8 Rate 1/2 Rate 3/4 Rate 4.2 dB 5.3 dB 6.2 dB 3.9 dB 4.9 dB 4.8 dB 6.1 dB 7.1 dB 4.5 dB 5.6 dB 5.5 dB 6.8 dB 7.9 dB 5.1 dB 6.3 dB 6.1 dB 7.6 dB 8.6 dB 5.7 dB 7 dB 6.7 dB 8.3 dB 9.3 dB 6.2 dB 7.7 dB 7.4 dB 8.9 dB 10.2 dB 6.8 dB 8.4 dB 8.2 dB 9.7 dB 11 dB 7.4 dB 9.1 dB 9 dB 10.3 dB 11.7 dB 8.1 dB 9.8 dB Technical Specifications 7/8 Rate 5.
DMD2050E Universal Satellite Modem Technical Specifications Table 7-4 - B/O/QPSK BER Performance (Turbo) Specification Typical Turbo 0.495 Turbo 0.793 Turbo 0.495 Turbo 0.793 1E-3 2.5 dB 3.3 dB 2.2 dB 3 dB 1E-4 2.7 dB 3.7 dB 2.3 dB 3.2 dB 1E-5 3 dB 4.1 dB 2.5 dB 3.4 dB 1E-6 3.2 dB 4.4 dB 2.6 dB 3.6 dB 1E-7 3.5 dB 4.8 dB 2.7 dB 3.8 dB 1E-8 3.7 dB 5.2 dB 2.9 dB 4 dB 1E-9 4 dB 5.6 dB 3 dB 4.2 dB 1E-10 4.2 dB 5.9 dB 3.2 dB 4.
DMD2050E Universal Satellite Modem Technical Specifications Table 7-7 - 16QAM BER Performance (Viterbi) BER Specification Typical 3/4 Rate 7/8 Rate 3/4 Rate 7/8 Rate 1E-3 8.9 dB 10.3 dB 8.1 dB 9.5 dB 1E-4 9.8 dB 11.1 dB 9 dB 10.3 dB 1E-5 10.7 dB 11.9 dB 9.9 dB 11.1 dB 1E-6 11.5 dB 12.7 dB 10.7 dB 11.9 dB 1E-7 12.4 dB 13.5 dB 11.6 dB 12.7 dB 1E-8 13.3 dB 14.3 dB 12.5 dB 13.5 dB 1E-9 14.2 dB 15.1 dB 13.4 dB 14.3 dB 1E-10 15 dB 15.9 dB 14.2 dB 15.
DMD2050E Universal Satellite Modem BER 1E-3 1E-4 1E-5 1E-6 1E-7 1E-8 Table 7-10 - (O)QPSK BER Performance (Turbo) Specification Typical 1/2 Rate 3/4 Rate 7/8 Rate 1/2 Rate 3/4 Rate 3.2 dB 4 dB 2.8 dB 3.4 dB 4.1 dB 3 dB 2.7 dB 3.6 dB 4.2 dB 2.4 dB 3.2 dB 2.9 dB 3.8 dB 4.3 dB 2.6 dB 3.4 dB 3.1 dB 4.1 dB 4.4 dB 2.8 dB 3.7 dB 3.3 dB 4.4 dB 4.5 dB 3 dB 4 dB Technical Specifications 7/8 Rate 3.7 dB 3.8 dB 3.9 dB 4 dB 4.1 dB 4.
DMD2050E Universal Satellite Modem BER 1E-5 1E-9 BER 1E-5 1E-9 Table 7-14 - B/O/QPSK BER Performance (LDPC) Specification Typical 1/2 Rate 2/3 Rate 3/4 Rate 1/2 Rate 2/3 Rate 2 dB 2.3 dB 3 dB 1.7 dB 2 dB 2.3 dB 2.7 dB 3.3 dB 2 dB 2.3 dB Technical Specifications 3/4 Rate 2.6 dB 3 dB Table 7-15 - 8PSK / 8-QAM Rate BER Performance (LDPC) 8PSK 8-QAM Specification Specification Typical Typical 2/3 Rate 3/4 Rate 2/3 Rate 3/4 Rate 2/3 Rate 3/4 Rate 2/3 Rate 3/4 Rate 5.6 dB 5.2 dB 4.6 dB 5.6 dB 4.2 dB 5.
DMD2050E Universal Satellite Modem BER 1E-3 1E-4 1E-5 1E-6 1E-7 1E-8 1E-9 1E-10 BER 1E-3 1E-4 1E-5 1E-6 1E-7 1E-8 1E-9 1E-10 BER 1E-3 1E-4 1E-5 1E-6 1E-7 1E-8 1E-9 BER 1E-3 1E-4 1E-5 1E-6 1E-7 1E-8 1E-9 BER 1E-3 1E-4 1E-5 1E-6 1E-7 1E-8 1E-9 BER 1E-3 1E-4 1E-5 1E-6 1E-7 1E-8 1E-9 Technical Specifications Table 7-18 - 8PSK BER Performance (MILSTD 188-165B or STANAG) Turbo Specification 16K Block Typical 16K Block 1/2 Rate 2/3 Rate 3/4 Rate 7/8 Rate 19/20 Rate 1/2 Rate 2/3 Rate 3/4 Rate 7/8 Rate 19/20 Rat
DMD2050E Universal Satellite Modem Technical Specifications 7.13 AGC Output Voltage The AGC Output Voltage is a function of the Input Power Level in dBm. The AGC Output Voltage is found on the Alarm connector Pin 14 of J15. Figure 7-13.
Appendix A. A.1 Product Options Hardware Options These enhanced interface cards are available: DC Input Prime Power Allows for an optional 48VDC Input Power Source DoubleTalk® Carrier-in-Carrier® (CnC) Allows for an optional CnC upgrade A.2 Custom Options Custom options are available for the DMD2050E. Get most custom options through firmware and software changes.
DMD2050E Universal Satellite Modem Product Options BLANK PAGE MN-DMD2050E Revision 2 A–2
Appendix B. Front Panel Upgrades and Demonstration Mode B.1 Introduction The DMD2050E Universal Satellite Modem allows you to install feature demonstrations and permanent upgrades using the front panel. Demonstration upgrades operate only during a 30-day evaluation period. Purchased upgrades continue to operate as part of the permanent configuration. B.2 Required Equipment The unit is shipped fully assembled. Do not remove the covers when you install the unit. B.
DMD2050E Universal Satellite Modem B.3.1 Front Panel Upgrade Procedure Record the Features and Options Find and record the features and options that you want to add to the unit. 1. Go to the MAIN Menu. 2. Go to the SYSTEM Menu. 3. Go to the HW/FW CONFIG Menu. 4. Go to the FEATURES Menu. The lower line shows NORMAL. 5. Go to the UPGRADE LIST Menu. 6. Scroll through the list of features and options. 7. Record the items you want to upgrade. The Option is on the top line. The Status is on the bottom line.
DMD2050E Universal Satellite Modem B.3.2 Front Panel Upgrade Procedure Record the Unit ID Comtech requests the Unit ID when you order an upgrade or a demonstration. Use the front panel to find and record the Unit ID: 1. Go to the MAIN Menu. 2. Go to the SYSTEM Menu. 3. Go to the HW/FW CONFIG Menu. 4. Go to the FEATURES Menu. (The lower line shows NORMAL.) 5. Press to show the Unit ID. 6. Record the Unit ID. 1234.1234.1234 The 12-digit Unit ID is on the top line. ––––.––––.–––– B.3.
DMD2050E Universal Satellite Modem Front Panel Upgrade Procedure B.3.4 Install the Code Use the front panel to enter this code and install the upgrade: 1. Go to the MAIN Menu. 2. Go to the SYSTEM Menu. 3. Go to the HW/FW CONFIG Menu. 4. Go to the FEATURES Menu. (The lower line shows NORMAL.) 5. Press to show the Unit ID. 6. Press ENTER to start data entry. The cursor flashes to show that data entry is available. 7. Use the numeric keys to enter the new code. 8. Press ENTER to accept the data. 1234.
DMD2050E Universal Satellite Modem Front Panel Upgrade Procedure B.3.5 Demonstration Mode Considerations The unit uses several indicators to show that it is in demonstration mode: TEST MODE LEDs Flash The MOD and DEMOD TEST MODE LEDs flash when the unit is operating in demonstration mode. The flashing occurs even if the unit is in a test mode where the LED light is normally on constantly. FEATURES Menu On the FEATURES menu, the lower line shows DEMO.
DMD2050E Universal Satellite Modem Front Panel Upgrade Procedure B.3.6 Cancel the Demonstration Mode IMPORTANT If you cancel the demonstration mode, the unit returns to operating with the former permanent configuration immediately. After a demonstration mode has been canceled, you cannot restart it with the same demonstration code. Request a new code to start a new demonstration. Use the front panel to cancel the demonstration mode: 1. Go to the MAIN Menu. 2. Go to the SYSTEM Menu. 3.
Appendix C. Carrier Control C.1 Carrier Control and Alarms If a TX major alarm occurs, modulator output is muted automatically. This automatic muting prevents the modulator from using an unknown spectrum and possibly disturbing adjacent carriers. To override an automatic muting of the output, mask the alarm that is causing the fault. This mask lets the transmission continue, even if the fault occurs. C.
DMD2050E Universal Satellite Modem Carrier Control C.3 Carrier States These are the carrier states: • Carrier OFF • Carrier VSAT • Carrier ON • Carrier RTS • Carrier AUTO You set the carrier states using the CARRIER menu. The path is: MODULATOR IF CARRIER {OFF, ON, AUTO, VSAT, RTS} C.3.1 Carrier OFF The modulator output is OFF. If you change the modulator output and satellite footprint, then the unit sets the carrier state to Carrier OFF.
DMD2050E Universal Satellite Modem Carrier Control 2. The output starts again automatically. C.3.4 Carrier VSAT The carrier state is Carrier VSAT. You change the modulator output and the satellite footprint. If you use the front panel to make the change: 1. The output is stopped automatically. 2. A popup message prompts you to confirm the change. 3. The unit waits for signal lock to occur on the demodulator. 4. The output starts again automatically. If you use a terminal to make the change: 1.
DMD2050E Universal Satellite Modem Carrier Control BLANK PAGE MN-DMD2050E Revision 2 C–4
Appendix D. Web Interface Setup Guide D.1 Introduction The web interface lets Radyne products connect and communicate through the Ethernet port. The connection is a 10Base-T Ethernet connection. You use the web interface to control and monitor the parameters and functions of these connected units. To find out if the unit has the Web interface, use the front panel control screen and make sure that you can see the WEB submenu. If you do not see the WEB submenu, contact customer service for help.
DMD2050E Universal Satellite Modem Web Browser Setup Guide D.2.2 IP Address IMPORTANT Before you set an IP address, contact the IT authority in your organization for help. The BOOT MODE setting controls access to the IP address for the unit. The unit is shipped from the factory with the BOOT MODE set to DEFAULT (a fixed address that is not accessible). To access the unit through the Ethernet port, set the Boot Mode to IP TEST (a fixed IP address that is accessible).
DMD2050E Universal Satellite Modem Web Browser Setup Guide D.3.2 User Account Data IMPORTANT All entries are case-sensitive. Parameter Character type Maximum Minimum Restrictions User ID ASCII Printable Characters 13 0 None Authentication Password ASCII Printable Characters 13 0 None Web User ASCII Printable Characters 13 0 None Access Group Access Level Description GUEST View Only Guests see most of the site and modem parameter settings.
DMD2050E Universal Satellite Modem Web Browser Setup Guide IMPORTANT All entries are case-sensitive. To set up a User Account, do these steps: 1. Edit the User ID. 2. Edit the Access Group. 3. Edit the Authentication Password. D.1.1 Edit the User ID. 1. Select the User ID. 2. Press ENTER. 3. Move the cursor to the first character. 4. Press CLEAR and theright button to delete the characters. 5. Use the direction buttons and numeric keys to enter the new User ID. 6. Press ENTER to save the change. D.1.
DMD2050E Universal Satellite Modem Web Browser Setup Guide D.2 Reset a User Account Sometimes, it is necessary to reset a user account to the factory defaults. For example, a user account may be locked because of too many incorrect password attempts. Release the lock by resetting the user account. Then, set up the user account again. To reset a User Account, do these steps: 1. Select the User ID. 2. Press the down button. 3. Press theright button until you see USER RESET. 4.
DMD2050E Universal Satellite Modem Web Browser Setup Guide D.4 Equipment Website Once you know that the modem is accessible through the internet, do these steps: 1. Start the internet browser. 2. Type the modem’s IP address in the address field, and then press [Enter]. The WEB browser equipment introduction page opens. Figure D-1.
DMD2050E Universal Satellite Modem Web Browser Setup Guide The Introduction page shows general information, such as: • Type of equipment • Equipment features and capabilities overview • Hardware and software options that are available Other links are available on the Introduction page: • Links to the PDF files that contain technical specifications and product options • Links to the Comtech EF Data website and customer service pages D.4.
DMD2050E Universal Satellite Modem Web Browser Setup Guide D.5 Web Page Appearance This page displays the Monitor and Control section of the modem web interface. The page has an appearance that resembles the DMD2050E layout. The front panel display section of the page shows the current front panel alarm status of the modem. This display is updated immediately any time the status changes. Figure D-3. Monitor and Control Web Page The navigation tabs correspond to the front panel top-level menus.
DMD2050E Universal Satellite Modem Web Browser Setup Guide D.6 Configure Web Browsers for the Radyne WEB Interface D.6.1 Configure Internet Explorer 9 for the Radyne WEB Interface Click the Compatibility View button on the address bar. When Compatibility View is active, the color of the button is blue. If Compatibility View is active, the Monitor & Control window should be displayed correctly. D.6.
DMD2050E Universal Satellite Modem Web Browser Setup Guide D.6.2.1 Change the encoding: Click View on the Firefox menu bar. Select Character Encoding and click Western (ISO-8859-1). The page refreshes and shows the correct values.
DMD2050E Universal Satellite Modem Web Browser Setup Guide D.6.2.2 Install the Internet Explorer Tab V2 add-on The Internet Explorer (IE) Tab V2 add-on lets you open WEB browser pages in Internet Explorer 7 mode. The link to the add-on is https://addons.mozilla.org/en-US/firefox/addon/ie-tab2-ff-36/ Download and install IE Tab V2. After IE Tab V2 is installed, Firefox restarts. Go to Tools / IE Tab 2 Options and add the Radyne product IP address to the Sites Filter. In this example, Address 192.168.1.
DMD2050E Universal Satellite Modem Web Browser Setup Guide D.6.3 Configure Chrome for the Radyne WEB Browser When you open the Monitor & Control window, you may see the error message “This webpage is not available”. Click the Chrome address bar. Make sure the full address is highlighted, and then press Enter. The Monitor & Control window opens. On the Monitor & Control, Password Setup or IP Administration windows, some fields may be blank or contain Update.
DMD2050E Universal Satellite Modem Web Browser Setup Guide D.6.3.1 Change the encoding On the Chrome address bar, click the wrench icon (Customize and Control Google Chrome). Go to Tools / Encoding and click Western (ISO-8859-1). The page refreshes and shows the correct values.
DMD2050E Universal Satellite Modem Web Browser Setup Guide D.6.3.2 Install the Internet Explorer Tab for Chrome The Internet Explorer (IE) Tab lets you open WEB browser pages in Internet Explorer 7 mode. The link to install IE Tab is: https://chrome.google.com/webstore/search/IE%20Tab?utm_source=chrome-ntp-icon To install IE Tab, click + ADD TO CHROME next to IE Tab. After IE Tab is installed, the IE Tab icon shows in the address bar. To use IE Tab, click the icon.
DMD2050E Universal Satellite Modem Web Browser Setup Guide D.6.4 Configure Safari for the Radyne WEB Browser IMPORTANT First, make sure to empty the browser cache. D.6.4.1 Empty the browser cache On the Safari menu bar, click Edit and then click Empty Cache... Click [Empty] on the confirmation popup window. After the browser cache is empty, open the Monitor & Control page. CAUTION If you do not empty the browser cache before you open the Monitor & Control page, communication can be lost.
DMD2050E Universal Satellite Modem Web Browser Setup Guide D.6.4.2 Reset the Ethernet M&C port To reset the Ethernet M&C port, either 1) cycle the electrical power OFF and ON, or, 2) re-enter the Modem IP Address. Re-entering the Modem IP Address avoids traffic disruption. D.6.4.3 Re-enter the Modem IP address 1. Go to SYSTEM / TCP/IP / MODEM IP ADDR. 2. Press ENTER. 3. Type the new IP Address and press ENTER. 4. Press ENTER again. 5. Retype the new IP Address and press ENTER.
DMD2050E Universal Satellite Modem Web Browser Setup Guide On the Monitor & Control, Password Setup or IP Administration windows, some fields may be blank or contain Update. To correct the display, change the encoding. NOTE If you leave a window and return, it may be necessary to correct the display again.
DMD2050E Universal Satellite Modem Web Browser Setup Guide D.6.4.4 Change the encoding Click View on the Safari menu bar. Select Text Encoding and click Western European. (The Default selection is not applicable.) The page refreshes and shows the correct values.
DMD2050E Universal Satellite Modem Web Browser Setup Guide D.6.5 Configure Maxthon for the Radyne WEB Browser On the Monitor & Control, Password Setup or IP Administration windows, some fields may be blank or contain Update. To correct the display, either 1) change the browser mode, or, 2) change the encoding. NOTE If you leave a window and return, it may be necessary to correct the display again.
DMD2050E Universal Satellite Modem Web Browser Setup Guide D.6.5.1 Change the browser mode Two browser modes are possible: Ultra Mode (default) Retro Mode Click the browser mode icon at the right of the address bar. Select Retro Mode MN-DMD2050E Revision 2 . The page refreshes and shows the correct values.
DMD2050E Universal Satellite Modem Web Browser Setup Guide D.6.5.2 Change the encoding On the Monitor & Control page, right click to open the browser menu. Select Encoding, and then click the encoding type that is already selected. The page refreshes and shows the correct values.
DMD2050E Universal Satellite Modem Web Browser Setup Guide BLANK PAGE MN-DMD2050E Revision 2 D–22
Appendix E. Drop and Insert (Standard and Efficient Options) E.1 Introduction Drop and Insert (D&I) functions let a full T1 or E1 terrestrial trunk and a fractional Nx64 Kbps satellite channel work together. The framing of the terrestrial trunk is specified in CCITT G.704. The D&I specifications agree with IBS, small IDR, and Radyne Proprietary Efficient D&I Framing Structures. The Drop and Insert functions are independent of each other.
DMD2050E Universal Satellite Modem Efficient Drop and Insert Objective Menu Path Find the G.703 interface card status. SYSTEM Requirement HW/FW CONFIG TERR INTFC BRD Find the Open Network Drop and SYSTEM Insert status. 01-PLR5660 or AS/4975 (or equivalent) D&I HW/FW CONFIG INSTALLED (required) FEATURES UPGRADE LIST Optional settings are: ENH ASYNC INSTALLED AUPC INSTALLED Update the unit with the latest firmware, if necessary. Download the latest firmware from the Comtech website. E.
DMD2050E Universal Satellite Modem Efficient Drop and Insert Figure E-1.
DMD2050E Universal Satellite Modem Efficient Drop and Insert E.4 Functional Descriptions E.4.1 Drop Only When Drop is enabled and Insert is disabled, the unit performs a drop-only function. Framed E1 or T1 Data is input via the Send Data In Port, the selected timeslots are dropped into the IBS frame structure, and the unaltered terrestrial data is output via the Send Data Out Port (see Figure E-3). Figure E-3 Drop Only E.4.
DMD2050E Universal Satellite Modem Efficient Drop and Insert Figure E-4 Insert Only with Eternal Frame Source Figure E-5 Insert Only with Internal Frame Source MN-DMD2050E Revision 2 E–5
DMD2050E Universal Satellite Modem Efficient Drop and Insert E.4.3 Data Formats The terrestrial data formats compatible with D&I include: E1 Data T1 Data PCM-30 T1-D4 PCM-30C T1-ESF PCM-31 SLC-96 PCM-31C E.4.3.1 PCM-30 The PCM-30 Mode of Operation supports an E1 Interface with Multiframe Alignment (MFAS) and Channel Associated Signaling (CAS). The user may independently program n timeslots to drop and n timeslots to insert where n = 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, or 30.
DMD2050E Universal Satellite Modem Efficient Drop and Insert drop and n timeslots to insert where n = 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, or 30. Because there is no implied ABCD signaling, the user is free to select timeslot 16 as a Drop or Insert Timeslot. E.4.3.4 PCM-31C The PCM-31C Mode of Operation supports an E1 Interface with no Multiframe Alignment (MFAS) or Channel Associated Signaling (CAS).
DMD2050E Universal Satellite Modem Efficient Drop and Insert SATCh TS Enter to Edit Any changes made in these displays are made on the screen, but are not entered into the modem. Once these menus are configured, the Mapping Menu must be used to actually enter the settings into the modem.
DMD2050E Universal Satellite Modem Efficient Drop and Insert Example : For a modem w/ Drop and Insert enabled at a data rate of 256 (with timeslots assigned 1 - 1, 2 2, etc.). At a data rate of 256, the modem will allow 4 channels to assign timeslots. Under the Tx Menu, assign the timeslots that are to be used to the 4 channels. CH1 is assigned to TS1 (Timeslot #1), CH2 to TS 2, CH3 to TS3 and CH4 to TS4, must be depressed after assigning each individual TS.
DMD2050E Universal Satellite Modem Efficient Drop and Insert Map Copy RX EDIT > RX ACTIVE 4. Press to enter the settings into the modem. To View the current Timeslot Assignment: 1. If there is a question of the channels not being entered properly, the Mapping Menu may be used to see how the channels/timeslots are configured in the modem. 2. Use and the Arrow Keys to make the mapping menu read (for the Tx Side): Map Copy TX ACTIVE > TX EDIT 3. Press .
DMD2050E Universal Satellite Modem Efficient Drop and Insert E.5.1 Data Rate Data Rate affects the Drop and Insert function in the following ways: • It determines the number of Satellite Channels that will be displayed in the Edit Maps. • It contributes to the Operational Mode selection process. Trying to change the Operational Mode to D&I when a data rate is not set to a valid D&I rate will result in the error message ‘INVALID DATA RATE,’ and the mode change will not be allowed.
DMD2050E Universal Satellite Modem Efficient Drop and Insert n = 12, data rate = 768000 n = 15, data rate = 960000 n = 16, data rate = 1024000 n = 20, data rate = 1280000 n = 24, data rate = 1536000 n = 30, data rate = 1920000 (valid with E1 Interface only) E.5.2 Operational Network Specification The Network Specification of the Modem often determines which additional menus and displays are available for use by the operator.
DMD2050E Universal Satellite Modem E.5.3.1 Efficient Drop and Insert Insert Terrestrial Frame Source The Insert Terrestrial Frame Source selection tells the Modem from where the Insert Terrestrial Frame is coming. External: Indicates that the terrestrial frame is to be input via the Insert Data In Port.
DMD2050E Universal Satellite Modem Efficient Drop and Insert Under Tx D&I: Set Drop Mode = T1-D4 Use SATCh TS edit capability to define desired mapping of Satellite Channels to drop Terrestrial Slots Use Map Copy to copy Tx Edit to Tx Active Under Modulator: Under Mod Data: Set Data Rate = 512000 Set Conv Enc = 3/4 Rate VIT Under Modulator: Set Network Spec.
DMD2050E Universal Satellite Modem Efficient Drop and Insert Set Conv Enc = 3/4 Rate VIT Under Interface: Under RX Setup: Set Rx Type according to your hardware configuration Set Buff Size to desired depth Under Rx D&I: Set Insert Mode = T1-D4 Set T1 E1 Frm Src = External Use SATCh TS edit capability to define proper mapping of Satellite Channels to insert Terrestrial Slots Use Map Copy to copy Rx Edit to Rx Active Under Demodulator: Under Demod IF: Set Frequency to desired value Under Demodulator: Set Ne
DMD2050E Universal Satellite Modem Efficient Drop and Insert Set Rx Type according to your hardware configuration Set Buff Size to desired depth Under Rx D&I: Set Insert Mode = T1-D4 Set T1 E1 Frm Src = External Use SATCh TS edit capability to define proper mapping of Satellite Channels to insert Terrestrial Slots For Satellite Channels that are not to be inserted, enter “NI” (No Insert) for the Terrestrial Slot Use Map Copy to copy Rx Edit to Rx Active Under Demodulator: Under Demod Data: Set Data Rate =
DMD2050E Universal Satellite Modem E.5.4.
DMD2050E Universal Satellite Modem Efficient Drop and Insert Figure E-9 Rx Only With Trunk Figure E-10 Rx Only No Trunk MN-DMD2050E Revision 2 E–18
DMD2050E Universal Satellite Modem Efficient Drop and Insert E.6 D&I Maps and Map Editing The Drop and Insert multiplexer is programmed by loading it with a transmit and receive map. Maps always contain 30 entries, although, only the first “n” entries are relevant (see Table E-1). The modem includes provisions to copy, change, and store the D&I transmit and receive maps directly from the Front Panel or via the remote MandC link.
DMD2050E Universal Satellite Modem Efficient Drop and Insert Therefore, in this case only the first six entries of the map would be relevant. The Modem is equipped with eight permanently stored default maps, which are designated ROM 1 through ROM 8. The user may also define, modify, and save an additional eight maps which are designated USER 1 through USER 8. IMPORTANT ROM maps are read-only and may not be modified (see Table H-2). ROM Map Table E-2.
DMD2050E Universal Satellite Modem Efficient Drop and Insert map through the modem’s LCD; when editing is complete, the appropriate map should be copied to the Active Map. Any map may be copied to any other map with the exception of the ROM maps. These maps may only be the source of the data used to create a User, Edit, or Active Map. Maps can be created in the map editor and stored as “User Maps”.
DMD2050E Universal Satellite Modem Efficient Drop and Insert time slots of the T1 or E1 frame. The Multiplexer would know to look only at the first four entries in the Active map(s) and would ignore the other 26 entries. ROM Map 4 could be used as the template for an Active Transmit (Drop) or Active Receive (Insert) Map with a modulator and/or demodulator configured for 384 Kbps operation.
DMD2050E Universal Satellite Modem Efficient Drop and Insert This would be used with T1 frames where channels 1 through 24 are mapped into time slots 1 through 24 (in any order). Map slots 25 through 30 would be ignored. ROM Map 8 could also be used as the template for an Active Transmit (Drop) and/or Active Receive (Insert) Map with a modulator and/or demodulator configured for 1920 Kbps operation.
DMD2050E Universal Satellite Modem Efficient Drop and Insert E.8 Prerequisite In order for a modem to be configured for efficient Drop and Insert, the modem must have a G.703 Interface card installed and Open Network Drop and Insert must be enabled. If you modem does not have the required hardware and/or feature set enabled, you will need to contact your Comtech salesperson to order the appropriate hardware and/or feature set upgrade.
DMD2050E Universal Satellite Modem Efficient Drop and Insert E.9 Efficient Drop and Insert Mode With Efficient Drop and Insert, the terrestrial interface selections, terrestrial framing modes, terrestrial to satellite mapping, ES to ES channel, satellite and terrestrial backward alarm functionality, and the In Station Prompt and Deferred Service alarm operation are identical to that of the Open Network standard.
DMD2050E Universal Satellite Modem Efficient Drop and Insert 600 station in-band rate. In most cases, this should be set to the 1200 same rate or higher than the ES port baud rate. When this 2400 rate is set lower than the ES port baud rate, the user must 4800 insure that the actual transmission rate does not exceed the 9600 in-band rate, otherwise, characters will be dropped 19200 E.9.1 Calculating the Required Satellite Bandwidth In order to calculate the satellite bandwidth (i.e.
DMD2050E Universal Satellite Modem Efficient Drop and Insert E.9.4 Calculating the Efficient D&I Rate with Enhanced Asynchronous Overhead The amount of overhead required to carry the Enhanced Async is driven by the in-band baud rate.
DMD2050E Universal Satellite Modem Efficient Drop and Insert X = Truncation of (1.92) X=1 Add 1 * 5 * 125 bps to our previous calculation gives 331875 bps An increase of 625 bps to carry 1200 baud Example 2a: 10 Drop Slots with T1-D4 framing, standard ES to ES overhead For 10 Drop Slots, the Data Rate would be 10 * 64000 or 640000 bps The Efficient D&I Rate would be 640000 + (10 * 250) bps = 642500 bps The Open Network rate is over 40,000 bps higher at 682667 bps.
Appendix F. TCP/IP Ethernet Setup F.1 Introduction The modem supports SNMP, FTP protocols and the Web Browser. Utilization of the protocols is dependent upon proper set up of the TCP-IP menus. This document is to be used only as a guideline for setting up the TCP-IP menus. Contact the IT manager for proper guidance to ensure setup is successful. For additional information on the various WEB or SNMP configurations and descriptions refer to the Remote Protocol Manual (MN-DMDREMOTEOP). F.
DMD2050E Universal Satellite Modem TCP/IP Ethernet Setup • MODEM IP ADDR 010.000.000.001 • SERVER IP ADDR 010.001.001.001 • ROUTER IP ADDR 010.000.001.001 b. BOOTp: When enabled, at boot time, the modem will use the Bootp Protocol to automatically get names, masks, and IP Addresses of the modem, router, and server from the Network Manager. This should be consistent with the tag expected by the users Bootp Server (see the next menu selection for setting the BOOTp TAG).
DMD2050E Universal Satellite Modem TCP/IP Ethernet Setup and loop back addresses will not be allowed. Example Server IP Address setting: 172.018.004.250. 7. ROUTER IP ADDR: This allows for the setup of the Network Router IP Address. If a router is present on the local network, and it is to be used, this address must be consistent with the IP Address Mask and the subnet of the modem. If no router is present, then the address should be set to a foreign address.
DMD2050E Universal Satellite Modem TCP/IP Ethernet Setup F.4 Ethernet Test F.4.1 Connecting the Modem Ethernet Cable to a Network Link 1. Connect the Network Switch (Hub) to the Modem Ethernet port (J9) using standard RJ-45 to RJ-45 10BaseT (CAT5) Cables as shown below. DMD2050E Ethernet Network Connection F.4.2 Connecting the Modem Ethernet Cable Directly to a Computer (without a Network) The user can directly connect to the equipment without connecting to a network.
DMD2050E Universal Satellite Modem TCP/IP Ethernet Setup 1. Click the Start button. 2. Select Settings and click Control Panel. 3. Double-click Network Connections. 4. Select Local Area Connection for the applicable Ethernet adapter. Typically, it is the first Local Area Connection listed. 5. Double-click Local Area Connection. 6. Click Properties. Local Area Connection Status and Properties Windows 7. Make sure that Internet Protocol (TCP/IP) is checked. 8.
DMD2050E Universal Satellite Modem TCP/IP Ethernet Setup Internet Protocol (TCP/IP) Properties 9. Select “Use the following IP Address”. 10. Enter an IP Address that is different from the equipment IP address by at least 5 digits. The computer and the equipment cannot use the same address. 11. Enter a Subnet Mask. This must be the same subnet mask that is programmed into the equipment. 12. Click the OK button to complete the PC Configuration.
DMD2050E Universal Satellite Modem TCP/IP Ethernet Setup F.5 Testing the Ethernet Connection using the Ping Program (Optional) To verify that connectivity and settings are correct, use the Ping command to report if the Host (Equipment) is correctly responding. This is accomplished by opening the MSDOS Command Prompt and executing a Ping command as shown in the following example. 1. Open MSDOS Command Prompt. The Screen will display: Microsoft Windows XP [Version 5.1.
DMD2050E Universal Satellite Modem TCP/IP Ethernet Setup 4. If the ping is unsuccessful the screen will display: C:\>ping 172.18.100.215 Pinging 172.18.100.215 with 32 bytes of data: Request timed out. Request timed out. Request timed out. Request timed out. Ping statistics for 172.18.100.215: Packets: Sent = 4, Received = 0, Lost = 4 (100% loss), Check the following items that may lead to the unsuccessful response: a.
Appendix G. AUPC Operation G.1 Automatic Uplink Power Control (AUPC Operation) The modem has an optional built-in provision for Automatic Uplink Power Control, AUPC. AUPC is useful when operating power levels are affected by environmental changes in the atmosphere. AUPC attempts to adjust local power output to maintain a constant Eb/No at the receiver location. The modem supports three versions of AUPC. They include Radyne AUPC, EF AUPC and Near Side AUPC.
DMD2050E Universal Satellite Modem AUPC Operation drop in the remote Eb/No, it slowly begins to raise the output power, and will continue to adjust if the remote Eb/No continues to drop. As the rain increases in intensity, the remote Eb/No decreases but Local modem continues to increase its power level to compensate. When the rain diminishes, Local modem will see the remote Eb/No begin to increase. Local modem will lower its power level.
DMD2050E Universal Satellite Modem AUPC Operation The local receiver must be tuned and locked to the transmitter and then the internal Eb/No., is used for feedback. This creates a Tx-Satellite-Rx control loop. Near Side AUPC is primarily used for broadcast applications since the modem cannot expect to receive data from a distant location. Near Side AUPC can be utilized with any satellite framing or Network mode. There are safeguards built into the AUPC System.
DMD2050E Universal Satellite Modem AUPC Operation When the rain diminishes, Local modem will see the remote Es/No begin to increase. Local modem will lower its power level. The operation is therefore a feedback control loop with the added complication of a significant time delay. The AUPC Menu Functions and their descriptions are shown in Table G-1 and Table G-2. Table G-1.
Appendix H. Ethernet Data Interface Setup H.1 Configuring the modem to use the Ethernet Data Interface (Optional) When the optional Ethernet Data Interface Card is installed, all of the Ethernet related menus become available and can be used to control the interface as follows: Under the Interface Menu: Under the Tx Setup Menu: Set the Terrestrial Interface to Ethernet. Set the Ethernet Flow Control as desired. Set the Ethernet Daisy Chain as desired. Set the Ethernet QOS Type as desired.
DMD2050E Universal Satellite Modem Ethernet Data Interface Setup When Ethernet Data Interface is selected, the Tx Clock Source will default to SCTE and the Clock Polarity will default to Normal. In addition, the Buffer Clock will default to RxSat and the Buffer Clock Polarity will default to Normal. See also: Chapter 4, User Interfaces H.1.1 Ethernet Flow Control When disabled, if a packet is received for transmission and no packet buffer space is available, the incoming packet is discarded.
DMD2050E Universal Satellite Modem Ethernet Data Interface Setup When Port 4 is selected for Daisy Chain, any data received on Port 4 (JS4) is forwarded to of the other LAN side ports (Ports 1 - 3) and is not transmitted over the satellite. This is extremely useful in a point-to -multipoint configuration as illustrated in Figure H-1. H.1.3 Ethernet QOS Type When Normal QOS is selected, the interface determines a packets priority based on the following: • IEEE 803.
DMD2050E Universal Satellite Modem Ethernet Data Interface Setup H.1.5 Setting Up The DMD2050E Ethernet Bridge To Operate Like A FIFO In certain circumstances, it may be desirable to have the Ethernet interface operate in a FIFO like manner with no reordering of packets. This can be established by using a single port on the Ethernet interface and setting the Ethernet QOS Type to Port Based and the Ethernet QOS Queue to Strict Priority.
DMD2050E Universal Satellite Modem Ethernet Data Interface Setup H.1.6 Packet Statistics The following statistics are available under the Monitor Menu when the Ethernet Data Interface is selected. Total Packets This Counter displays the total number of Ethernet packets received from the satellite. Error Packets This counter displays the total number of Ethernet packets received from the satellite that had errors. Packet Error Rate This displays the Ethernet Packet Error Rate (PER) from the satellite.
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Appendix I. Strap Codes I.1 Strap Codes The Strap Code is a quick set key that sets many of the modem parameters. For quick setup of the modem, Strap Codes are very helpful. When a Strap Code is entered, the modem is automatically configured for the code’s corresponding data rate, overhead, code rate, framing, scrambler type and modulation. I.1.1 An example of how to set a strap code Example: At the Front Panel Menu, depress ‘↓’, then move ‘→’ to the ‘Strap Code’ Submenu and enter #16.
DMD2050E Universal Satellite Modem Strap Codes NOTE Dis = Disable in Table I-1.
Code Rate Type Framing Type Scrambler Type Drop and Insert Reed-Solomon Modulation Mode 768 1 1/2 VIT NONE V.35 (IESS) Dis Dis QPSK CNT 136 768 1 3/4 VIT NONE V.35 (IESS) Dis Dis QPSK CNT 144 896 1 1/2 VIT NONE V.35 (IESS) Dis Dis QPSK CNT 44 896 1 3/4 VIT NONE V.35 (IESS) Dis Dis QPSK CNT 7 1344 1 1/2 VIT NONE V.35 (IESS) Dis Dis QPSK CNT 11 1344 1 3/4 VIT NONE V.35 (IESS) Dis Dis QPSK CNT 13 1536 1 1/2 VIT NONE V.
Code Rate Type Framing Type Scrambler Type Drop and Insert Reed-Solomon Modulation Mode 320 16/15 3/4 VIT IBS IBS Dis Dis QPSK CNT 145 384 16/15 3/4 VIT IBS IBS Dis Dis QPSK IBS 100 448 16/15 1/2 VIT IBS IBS Dis Dis QPSK CNT 146 448 16/15 3/4 VIT IBS IBS Dis Dis QPSK CNT 104 576 16/15 1/2 VIT IBS IBS Dis Dis QPSK CNT 148 576 16/15 3/4 VIT IBS IBS Dis Dis QPSK CNT 152 640 16/15 1/2 VIT IBS IBS Dis Dis QPSK CNT 161 640 16/15
Code Rate Type Framing Type Scrambler Type Drop and Insert Reed-Solomon Modulation Mode 1600 16/15 3/4 VIT IBS IBS Dis Dis QPSK CNT 85 1664 16/15 1/2 VIT IBS IBS Dis Dis QPSK CNT 86 1664 16/15 3/4 VIT IBS IBS Dis Dis QPSK CNT 89 1728 16/15 1/2 VIT IBS IBS Dis Dis QPSK CNT 90 1728 16/15 3/4 VIT IBS IBS Dis Dis QPSK CNT 92 1792 16/15 1/2 VIT IBS IBS Dis Dis QPSK CNT 99 1792 16/15 3/4 VIT IBS IBS Dis Dis QPSK CNT 101 2048 16/
DMD2050E Universal Satellite Modem Strap Codes I.2 Sample Applications The following section provides brief application notes for operating the modem and explains by example how to configure the modem for some of the most popular configurations. The following information illustrates the allowable combinations for Mode and Data Rate. Allowable Combinations: Mode/Rate/Framing. IDR: 8.448 Mbps 3/4, 7/8 Rate FEC 6.312 Mbps 1/2, 3/4, 7/8 Rate FEC 2.048 Mbps 1/2, 3/4, 7/8 Rate FEC 1.
DMD2050E Universal Satellite Modem Strap Codes I.2.1 Operational Case Examples IMPORTANT Make sure to set the data rate to 512 Kbps initially. This data rate is applicable to all modes of operation. I.2.1.1 Case 1: IDR 8.
DMD2050E Universal Satellite Modem Strap Codes Set desired Tx frequency and power level Turn IF on Demodulator: Method 1 Under Interface Menu: Set Interface type Set Buff clock selection Set Buffer Size Set mode to IDR Under Demod IF Menu: Set desired Rx frequency Under Demod data Menu: Set code rate to 3/4 VIT Set data rate for 8448000 Method 2 Under Interface Menu: Set Interface type Set Buff clock selection Set Buffer Size Set Demod strap code to 128 Under Demod IF Menu Set desired Rx frequency MN-D
DMD2050E Universal Satellite Modem I.2.1.2 Strap Codes Case 2: IBS 1.
DMD2050E Universal Satellite Modem Strap Codes Demodulator: Method 1 Under Interface Menu: Set Interface type Set Buff clock selection Set Buffer Size Set Framing to 1/15: Set mode to IBS: Under Demod IF Menu: Set desired Rx frequency Under Demod Data Menu: Set code rate to 3/4 VIT Set data rate for 1544000 Under Interface Menu: Set Interface type Set Buff clock selection Set Buffer Size Method 2 Under Interface Menu: Set Interface type Set Buff clock selection Set Buffer Size Set Demod strap code to: 12
DMD2050E Universal Satellite Modem I.2.1.
DMD2050E Universal Satellite Modem Strap Codes Demodulator: Method 1 Under Interface Menu: Set Interface type Set Buff clock selection Set Buffer Size Set mode to: Closed Net Under Demod IF Menu: Set desired Rx frequency Under Demod data Menu: Set code rate to 3/4 VIT Set Framing for 1/15 Method 2 Under Interface Menu: Set Interface type Set Buff clock selection Set Buffer Size Set Demod strap code to: 101 Under Demod IF Menu: Set desired Rx frequency MN-DMD2050E Revision 2 I–12
DMD2050E Universal Satellite Modem I.2.1.
DMD2050E Universal Satellite Modem Strap Codes BLANK PAGE MN-DMD2050E Revision 2 I–14
Appendix J. J.1 ITA Operation Information Throughput Adaptation (ITA Operation) Information Throughput Adaptation (ITA) also known as Adaptive Coding and Modulation (ACM), allows the DMD2050E to mitigate downlink rain-fades by means of adapting the throughput of the modem effectively decreasing the modulation and coding by fixing the symbol rate and changing data rate to keep a constant power spectral density.
DMD2050E Universal Satellite Modem ITA Operation J.1.1 Properties of ITA on the DMD2050E: • The DMD2050E output power remains constant before, during, and after state changes. • The DMD2050E output spectral density remains constant before, during, and after state changes. • When ITA is enabled, the DMD2050E will automatically constrain the dynamic bit rate to conform to the limitations of the terrestrial interface that is selected for use in the DMD2050E configuration.
DMD2050E Universal Satellite Modem ITA Operation J.1.2 Basic Setup (Example) The modems will be initially configured in the lowest modulation and coding rate for the characteristic of the link. ITA uses a combination or composite data rate (serial + Ethernet) that will allow selection of any ITA waveforms. This means that all combinations of modulation and code rate have enough Ethernet bandwidth to achieve proper configuration and that all modulation and code rates are of the same block size.
DMD2050E Universal Satellite Modem J.1.2.1 ITA Operation Initial DMD2050E Modem Setup Table J-2 - Initial Modem Setup FW: F05280-AH28 REV 4.4.
DMD2050E Universal Satellite Modem ITA Operation Figure J-1 - Initial Setup DMD2050E, Modulator IF MN-DMD2050E Revision 2 J–5
DMD2050E Universal Satellite Modem ITA Operation Figure J-2 - Initial Setup DMD2050E, Modulator Data MN-DMD2050E Revision 2 J–6
DMD2050E Universal Satellite Modem ITA Operation Figure J-3 - Initial Setup DMD2050E, Modulator ITA MN-DMD2050E Revision 2 J–7
DMD2050E Universal Satellite Modem ITA Operation Figure J-4 - Initial Setup DMD2050E, Demodulator IF MN-DMD2050E Revision 2 J–8
DMD2050E Universal Satellite Modem ITA Operation Figure J-5 - Initial Setup DMD2050E, Demodulator Data MN-DMD2050E Revision 2 J–9
DMD2050E Universal Satellite Modem ITA Operation Figure J-6 - Initial Setup DMD2050E, Demodulator ITA At this point verify that both serial traffic and Ethernet traffic is properly passing through the system.
DMD2050E Universal Satellite Modem ITA Operation Table J-3 - ITA Setup FW: F05280-AH28 REV 4.4.
DMD2050E Universal Satellite Modem ITA Operation The ITA Menu Functions and their descriptions are shown in Table J-4 and Table J-5. Table J-4. Transmit ITA Functions Function ITA Available Options Description ITA Option {DISABLED, ENABLED} Enable or disable the ITA Function.
DMD2050E Universal Satellite Modem ITA Operation Table J-5. Receive ITA Functions Function AUPC Available Options Description ITA Option {DISABLED, ENABLED} Enable or disable the ITA Function.
DMD2050E Universal Satellite Modem ITA Operation Table J-6 – ITA Waveform Masks (Modulator UUT) DMD2050E MENU SETTINGS (UUT) MAIN MENU MENU OPTION PARAMENTER MODULATOR ITA BPSK 1/2 NOT SELECTSED MODULATOR ITA BPSK 2/3 SELECTED MODULATOR ITA BPSK 3/4 NOT SELECTSED MODULATOR ITA BPSK 7/8 NOT SELECTSED MODULATOR ITA BPSK 19/20 NOT SELECTSED MODULATOR ITA QPSK 1/2 NOT SELECTSED MODULATOR ITA QPSK 2/3 SELECTED MODULATOR ITA QPSK 3/4 NOT SELECTSED MODULATOR ITA QPSK 7/8 NOT
DMD2050E Universal Satellite Modem ITA Operation Table J-7 – ITA Waveform Masks (Demodulator UUT) DMD2050E MENU SETTINGS (UUT) MAIN MENU MENU OPTION PARAMENTER DEMODULATOR ITA BPSK 1/2 NOT SELECTSED DEMODULATOR ITA BPSK 2/3 SELECTED DEMODULATOR ITA BPSK 3/4 NOT SELECTSED DEMODULATOR ITA BPSK 7/8 NOT SELECTSED DEMODULATOR ITA BPSK 19/20 NOT SELECTSED DEMODULATOR ITA QPSK 1/2 NOT SELECTSED DEMODULATOR ITA QPSK 2/3 SELECTED DEMODULATOR ITA QPSK 3/4 NOT SELECTSED DEMODULATOR
DMD2050E Universal Satellite Modem ITA Operation Table J-8 – ITA Waveform Masks (Reference Modulator) DMD2050E MENU SETTINGS (Reference) MAIN MENU MENU OPTION PARAMENTER MODULATOR ITA BPSK 1/2 NOT SELECTSED MODULATOR ITA BPSK 2/3 SELECTED MODULATOR ITA BPSK 3/4 NOT SELECTSED MODULATOR ITA BPSK 7/8 NOT SELECTSED MODULATOR ITA BPSK 19/20 NOT SELECTSED MODULATOR ITA QPSK 1/2 NOT SELECTSED MODULATOR ITA QPSK 2/3 SELECTED MODULATOR ITA QPSK 3/4 NOT SELECTSED MODULATOR ITA Q
DMD2050E Universal Satellite Modem ITA Operation Table J-9 – ITA Waveform Masks (Reference Demodulator) DMD2050E MENU SETTINGS (Reference) MAIN MENU MENU OPTION PARAMENTER MODULATOR ITA BPSK 1/2 NOT SELECTSED MODULATOR ITA BPSK 2/3 SELECTED MODULATOR ITA BPSK 3/4 NOT SELECTSED MODULATOR ITA BPSK 7/8 NOT SELECTSED MODULATOR ITA BPSK 19/20 NOT SELECTSED MODULATOR ITA QPSK 1/2 NOT SELECTSED MODULATOR ITA QPSK 2/3 SELECTED MODULATOR ITA QPSK 3/4 NOT SELECTSED MODULATOR ITA
DMD2050E Universal Satellite Modem ITA Operation Figure J-7 - Initial Setup DMD2050E, Modulator ITA MN-DMD2050E Revision 2 J–18
DMD2050E Universal Satellite Modem ITA Operation Figure J-8 - Initial Setup DMD2050E, Demodulator ITA To setup ITA Mode first select all the appropriate waveforms you are intending to run. Waveforms marked “unattainable” are not allowed because the current symbol rate cannot be obtained based on the current serial rate selected, in other words the remaining Ethernet rate will be less than zero. Set the same waveforms in both the TX ITA and RX ITA functions so they match.
DMD2050E Universal Satellite Modem ITA Operation Figure J-9- Initial Setup DMD2050E, Modulator ITA (Enabled) MN-DMD2050E Revision 2 J–20
DMD2050E Universal Satellite Modem ITA Operation Figure J-10 - Initial Setup DMD2050E, Demodulator ITA (Enabled) MN-DMD2050E Revision 2 J–21
DMD2050E Universal Satellite Modem ITA Operation Figure J-11 –DMD2050E I/Q for BPSK 2/3 MN-DMD2050E Revision 2 J–22
DMD2050E Universal Satellite Modem ITA Operation Figure J-12 –DMD2050E ITA Status for QPSK 2/3 MN-DMD2050E Revision 2 J–23
DMD2050E Universal Satellite Modem ITA Operation Figure J-13 –DMD2050E I/Q for QPSK 2/3 MN-DMD2050E Revision 2 J–24
DMD2050E Universal Satellite Modem ITA Operation Figure J-14 –DMD2050E ITA Status for 16APSK 1/2 MN-DMD2050E Revision 2 J–25
DMD2050E Universal Satellite Modem ITA Operation Figure J-15 –DMD2050E I/Q for 16APSK 1/2 MN-DMD2050E Revision 2 J–26
DMD2050E Universal Satellite Modem ITA Operation Figure J-16 –DMD2050E ITA Status for 8PSK 3/4 MN-DMD2050E Revision 2 J–27
DMD2050E Universal Satellite Modem ITA Operation Figure J-17 –DMD2050E I/Q for 8PSK 3/4 MN-DMD2050E Revision 2 J–28
DMD2050E Universal Satellite Modem ITA Operation Figure J-18 –DMD2050E ITA Status for 16APSK 7/8 MN-DMD2050E Revision 2 J–29
DMD2050E Universal Satellite Modem ITA Operation Figure J-19 –DMD2050E I/Q for 16APSK 7/8 At this point changing the noise source level will dynamically change the selected waveforms. You can simulate fades by attenuating the receive signal to the system.
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