DMD20/DMD20 LBST Universal Satellite Modem Installation and Operation Manual TM103 Revision 2.8 Radyne Corporation • 3138 E. Elwood St. • Phoenix, AZ 85034 • (602) 437-9620 • Fax: (602) 437-4811 • www.radn.
DMD20/DMD20 LBST Universal Satellite Modem Warranty Policy Warranty Policy WP Radyne Corp. (Seller) warrants the items manufactured and sold by Radyne Corp. to be free of defects in material and workmanship for a period of two (2) years from date of shipment Radyne Corp.’s obligation under its warranty is limited in accordance with the periods of time and all other conditions stated in all provisions of this warranty.
Warranty Policy DMD20/DMD20 LBST Universal Satellite Modem Statements made by any person, including representatives of Radyne Corp., which are inconsistent or in conflict with the terms of this warranty, shall not be binding upon Radyne Corp. unless reduced to writing and approved by an officer of Radyne Corp. Warranty Repair Return Procedure Before a warranty repair can be accomplished, a Repair Authorization must be received. It is at this time that Radyne Corp.
DMD20/DMD20 LBST Universal Satellite Modem Preface Preface P This manual provides installation and operation information for the Radyne DMD20/DMD20 LBST Universal Satellite Modem. This is a technical document intended for use by engineers, technicians, and operators responsible for the operation and maintenance of the DMD20/DMD20 LBST.
Preface DMD20/DMD20 LBST Universal Satellite Modem Trademarks Product names mentioned in this manual may be trademarks or registered trademarks of their respective companies and are hereby acknowledged. Copyright ©2008, Radyne Corp. This manual is proprietary to Radyne Corp. and is intended for the exclusive use of Radyne Corp.’s customers.
DMD20/DMD20 LBST Universal Satellite Modem Table of Contents Table of Contents ToC Section 1 - Introduction _____________________________________________________ 1-1 1.0 Overview ______________________________________________________________ 1-1 1.1 Features/Options Installed at Time of Order ___________________________________ 1-2 1.1.1 Feature Upgrades ______________________________________________________ 1-2 1.1.2 Radyne Installed Options ________________________________________________ 1-2 1.1.
Table of Contents DMD20/DMD20 LBST Universal Satellite Modem 3.2.4 Modem Monitor Status __________________________________________________ 3-6 3.3 Async Port / ES-ES Communications_________________________________________ 3-7 3.4 Internal Clock ___________________________________________________________ 3-7 3.5 Loopback Features (Terrestrial & IF) _________________________________________ 3-8 3.6 Clocking Options _______________________________________________________ 3-11 3.6.
DMD20/DMD20 LBST Universal Satellite Modem Table of Contents Section 4 - User Interfaces ___________________________________________________ 4-1 4.0 User Interfaces __________________________________________________________ 4-1 4.1 Front Panel User Interface _________________________________________________ 4-1 4.1.1 LCD Front Panel Display_________________________________________________ 4-2 4.1.2 Cursor Control Arrow Keys _______________________________________________ 4-2 4.1.
Table of Contents DMD20/DMD20 LBST Universal Satellite Modem 5.3.7 EXT CLK (J16) ________________________________________________________ 5-6 5.3.8 ASYNC (J17)__________________________________________________________ 5-6 5.3.9 J18__________________________________________________________________ 5-6 5.3.10 EIA-530 (J19) ________________________________________________________ 5-7 5.3.11 REMOTE (J20) _______________________________________________________ 5-8 5.3.
DMD20/DMD20 LBST Universal Satellite Modem Table of Contents 5.11 Ethernet Data Interface (Optional) _________________________________________ 5-25 5.12 HSSI / G.703 _________________________________________________________ 5-25 5.12.1 64K AUDIO (J2) _____________________________________________________ 5-26 5.12.2 8K DATA (J3) _______________________________________________________ 5-27 5.12.3 G.703 BAL (J4) ______________________________________________________ 5-27 5.12.
Table of Contents DMD20/DMD20 LBST Universal Satellite Modem Section 7 - Technical Specifications ___________________________________________ 7-1 7.0 Data Rates _____________________________________________________________ 7-1 7.1 Modulator ______________________________________________________________ 7-1 7.2 Demodulator____________________________________________________________ 7-2 7.3 Plesiochronous Buffer ____________________________________________________ 7-2 7.
DMD20/DMD20 LBST Universal Satellite Modem Table of Contents Appendix A - Product Options ..................................................................................................A-1 A.0 Hardware Options _______________________________________________________ A-1 A.0.1 G.703/IDR ESC Interface ________________________________________________ A-1 A.0.2 Internal High Stability ___________________________________________________ A-1 A.0.
Table of Contents DMD20/DMD20 LBST Universal Satellite Modem Appendix E - TCP/IP Ethernet Setup ........................................................................................E-1 E.0 Introduction ____________________________________________________________ E-1 E.1 TCP/IP Network Configuration______________________________________________ E-1 E.2 Network Configuration Summary ____________________________________________ E-3 E.
DMD20/DMD20 LBST Universal Satellite Modem Table of Contents H.1 Configuring the Modem for Drop and Insert____________________________________ H-9 H.1.1 Data Rate ____________________________________________________________ H-9 H.1.2 Operational Network Specification ________________________________________ H-10 H.1.3 Terrestrial Framing - Drop Mode/Insert Mode________________________________ H-10 H.1.3.1 Insert Terrestrial Frame Source _________________________________________ H-11 H.1.
Table of Contents xvi DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Introduction Introduction 1 This chapter provides an overview of the DMD20/DMD20 LBST Universal Satellite Modem. The DMD20 will be referred to in this manual as “the standard unit” and the DMD20 LBST will be referred to as the LBST. When describing the DMD20/DMD20 LBST, it may be referred to as “the DMD20”, “the modem”, or “the unit”. 1.
Introduction DMD20/DMD20 LBST Universal Satellite Modem The DMD20 LBST (Figure 1-2) offers additional features that are not included in the standard DMD20 Modem. The features included in DMD20 LBST serves as an interface between the indoor unit (DMD20 LBST) and the outdoor units (consisting of the BUC and LNB). The output frequency of the LBST is 950 to 2050 MHz. It does not offer a 70 MHz output that is included in the standard unit.
DMD20/DMD20 LBST Universal Satellite Modem Introduction Only authorized service personnel should handle and install optional hardware options. 1.2 Function Accessibility All functions can be accessed through the front panel, terminal or personal computer via a serial link or via the Ethernet port offering a complete remote monitoring and control capability. TM103 – Rev. 2.
Introduction 1-4 DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Installation Installation 2 This section provides unpacking and installation instructions, and a description of external connections and backward alarm information. 2.0 Installation Requirements The DMD20/DMD20 LBST Modem is designed to be installed within any standard 19-inch (48.26 cm) wide equipment cabinet or rack. It requires one rack unit (RU) of mounting space (1.75 inches/4.45 cm) vertically and 19.25 inches (48.
Installation DMD20/DMD20 LBST Universal Satellite Modem Before initially applying power to the unit, it is a good idea to disconnect the transmit output from the operating ground station equipment. This is especially true if the current configuration settings are unknown, where incorrect settings could disrupt existing communications traffic. The modem contains a Lithium Battery. DANGER OF EXPLOSION exists if the battery is incorrectly replaced.
DMD20/DMD20 LBST Universal Satellite Modem Installation Should the Power Cable/AC Connector be of the wrong type for the installation, either the cable or the power connector end should be replaced. The power supply itself is designed for universal AC application. See specifications for appropriate voltages and currents. 2.3 Mounting Considerations When mounted in an equipment rack, adequate ventilation must be provided.
Installation DMD20/DMD20 LBST Universal Satellite Modem Implementing Strap Code 26 can set the following modem configuration. Refer to Table 4-4 for an explanation and tabular listing of available Strap Codes. The Frequency and Modulator Output Power are set independently of the strap code. Standard Factory Configuration Settings Modulator: Data Rate: Mode: Satellite Framing: Scrambler: Drop and Insert: Inner FEC: Outer FEC: Modulation: Frequency: Modulator Output Power: 2.
DMD20/DMD20 LBST Universal Satellite Modem Installation 2.5 Modulator Checkout The following descriptions assume that the modem is installed in a suitable location with prime AC power and supporting equipment available. 2.5.1 Initial Power-Up Before initial power up of the modem, it is a good idea to disconnect the transmit output from the operating ground station equipment.
Installation 2-6 DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation 3 Theory of Operation 3.0 Modem Hardware The modem 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.
Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem In the complex downconverter, the signal for demodulation is amplified and sent through a variable wideband attenuator for AGC. The gain-controlled signal is then passed through a complex downconverter to a low IF. Figure 3-2. IF Card Block Diagram 3.0.
DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation The Baseband Printed Circuit Card also contains the Monitor and Control (M&C) Circuitry responsible for: Programmable part setup and initialization Continuous control and adjustment of some functions Calibration Monitoring fault status Calculating and displaying measurements User monitor and control interface including front panel and remote Units configuration and feature set The M&C System is based on a powerful microprocesso
Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem Figure 3-3. Universal Satellite Modem Functional Block Diagram 3.1.1 Front Panel The Front Panel includes a 2 x 16 backlit LCD Display, Indicator LEDs, and a Numeric Keypad (refer to Section 4.1). 3.1.2 Baseband Processing The Baseband Processor performs all of the functions required for an IBS/IDR Framing Unit, a Reed-Solomon Codec, and an E1/T1 Drop and Insert System.
DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation 3.1.3 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 IDR, IBS, and D&I Modes, the framer adds the appropriate framing and ESC as defined in IESS-308 and 309. In D&I Mode, the framer acquires the terrestrial framing structure, E1 or T1, and synchronizes the Drop Processor.
Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem 3.2.1 Terminal Port This port supports an asynchronous control protocol as described in Section 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.
DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation Form-C Contacts: The UIM provides three Form-C Relays under processor control that appear at J15. Mod Fault: De-energized when any transmit side fault is detected. Demod Fault: De-energized when any receive side fault is detected. Common Fault: De-energized when any fault that is not explicitly a Tx or Rx Fault such as an M&C or Power Supply Fault.
Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem 3.5 Loopback Features (Terrestrial & IF) The modem provides for a number of different loopbacks. The Loopback supported are: IF Loopback – Tx IF port is looped back to the Rx IF port TX Terrestrial Loopback - Tx Data port is looped back to the Rx Data port after the interface driver/receiver. (prior to the framing unit) TX Baseband Loopback - Tx Data port is looped back to the Rx Data port after the interface driver/receiver.
DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation Figure 3-4. Loopback Functional Block Diagram TM103 – Rev. 2.
Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem Figure 3-5. Loopback Functional Block Diagram Figure 3-6. Loopback Functional Block Diagram 3-10 TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation 3.6 Clocking Options The modem supports a number of different clocking options that can be recovered from the satellite or the terrestrial links. 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 source and the Rx Buffer Clock source. Tx and Rx Clocks may be independently locked. INVERT NONE INV.
Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem The following paragraphs define the types of clocking options available to the user at the Front Panel. SCT (Internal Oscillator) SCTE (External Tx Terrestrial Clock) Rx Satellite Clock 3.6.1.1 SCTE: Serial Clock Transmit External The SCTE clock is the Transmit Terrestrial Clock associated with the data interface.
DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation The modem handles RX Buffer clock selections based on source priority levels. The user assigns priorities to the clock sources based on source selections. Source 1 has the highest priority and Source 5 being the last resort or lowest priority. If a fallback clock is selected and activity is lost at the highest priority source, the modem will fall back to the next highest priority clock with activity.
Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem 3.6.3 EXT REF: External Reference, Top BNC Port, J10 This is not actually a clock, but does have some clocking implications. When the external reference is used, the master oscillator within the modem is locked to the external reference, and the internal accuracy and stability of the unit assumes that of the External Reference.
DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation 3.8 Reed-Solomon Codec Refer to Figures 3-8, 3-9, and Table 3-1. Utilizing a Reed-Solomon (R-S) Outer Codec concatenated with a Convolutional Inner Codec is an effective way to produce very low error rates even for poor signal-to-noise ratios while requiring only a small increase in transmission bandwidth.
Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem Figure 3-8. Reed-Solomon Encoder Functional Block Diagram Figure 3-9. Reed-Solomon Decoder Functional Block Diagram 3-16 TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation Table 3-1. Reed-Solomon Codes Type of Service Data Rate (Kbps) R-S Code (n, k, t) 1 Bandwidth Expansion [ (n/k) -1 ] Interleaving Depth Maximum 2 R-S Codec Delay (ms) Small IDR (With 16/15 O/H) 64 128 256 384 512 768 1024 1536 (126, 112, 7) (126, 112, 7) (126, 112, 7) (126, 112, 7) (126, 112, 7) (126, 112, 7) (126, 112, 7) (126, 112, 7) 0.125 0.125 0.125 0.125 0.125 0.125 0.125 0.
Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem The “RS-485” Setting controls the output into tri-state when the modem is not transmitting data, allowing multiple modem outputs to be connected together. Table 3-2. 3-18 Kbps Baud Rate Example for Standard IBS Kbps Baud Rate Example for Enhanced Mode 128 64 9.6 300 256 128 19.
DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation 1792 19200 1856 19200 1920 19200 1984 19200 2048 19200 3.10 Standard IBS Mode In the first or “Normal” mode, all bit assignments are per the IBS standard. The bits of Overhead Housekeeping byte 32 are implemented as shown in Table 3-3 below: Table 3-3. Bit 1 ES to ES Data Channel This bit is routed directly to the ES to ES Data Channel.
Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem The IBS Async mode MUST be selected for true Asynchronous channel operation to be available. 3.12 ESC Backward Alarms When running in IDR Mode and if the modem has the ESC Option, there will be four Backward Alarms available for use by the earth stations at each end of the link (both ends must have the ESC option). These alarms are accessed via the ESC ALARMS Port.
DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation 3.12.1 To Disable the ESC Backward Alarms If the ESC ALARMS Port will not be used and the Backward Alarm Indications are to be disabled, you must connect pins 10, 11, 22 and 23 to pin 1 (gnd) on ESC Alarms port. 3.13 Satellite Control Channel (SCC) The SCC format uses a variable overhead rate to transmit an asynchronous data channel in addition to the normal data channel. The SCC asynchronous mode implemented on the DMD20 is "PassThru" Mode.
Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem 1 to 1 Control Ratio The Control Ratio of the receiving units must match the Control Ratio of the transmitting unit. 3.13.2 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.
DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation 3.13.3 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 examples of SCC overhead rates for different user data and control ratios.
Theory of Operation DMD20/DMD20 LBST Universal Satellite Modem Example 1: User Data Rate: In-Band Rate: Control Ratio: 1,024,000 bps 19,200 bps 1 to 7 Minimum In-Band = (1,024,000 * 7)/((7 + 1) * 250) = 3,584 (less than In-Band Rate) Slot Bits = (1,024,000 * (7 * 10))/(19,200 * (7 + 1)) = 466 Actual Ratio = (466 + 10)/466 = 1.021 Example 2: User Data Rate: In-Band Rate: Control Ratio: 6,312,000 bps 19,200 bps 1 to 7 3.13.5 SCC Overhead Channel Setup 1.
DMD20/DMD20 LBST Universal Satellite Modem Theory of Operation This allows the user to select the baud rate of the ASYNC port (J17) in SCC Mode. 7. Under TX ASYNC MODE Menu, set the desired ES BITS/CHAR: ES BITS/CHAR {7,8} This allows the user to choose between 7 or 8 bits of data. 8. Repeat Steps 4 through 7 under the RX ASYNC MODE (menu) 9. The physical connection to the overhead channel will be the DB-9 Female Port labeled ASYNC (J17). SCC Overhead Chart Examples (Viterbi 3/4 w/V.
Theory of Operation 3.14 DMD20/DMD20 LBST Universal Satellite Modem EDMAC Satellite Framing/Deframing Mode The modem supports EDMAC satellite framing. EDMAC can be enables for both modulator and demodulator satellite framing when modem is configured in CLOSED NET applications. EDMAC satellite framing DOES NOT allow control or monitoring of the remote slave modem. On the demodulator, terrestrial date is framed with NULL EDMAC commands, having no effect at the remote demodulator.
DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces 4 User Interfaces 4.0 User Interfaces This section contains information pertaining to the user interfaces for the modem. There are four user interfaces available for the modem. These are: • • • • • Front Panel Interface – Refer to section 4.1. Terminal Interface - :Refer to section 4.4. RS485 Remote Port Interface (RLLP) – Refer to the Section 4.6. Ethernet Remote Port Interface (SNMP) – Refer to Section 4.7.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem Table 4-1. Item Number Description Function 1 LCD Front Panel Display Displays operating parameters and Configuration data 2 Cursor Control Arrow Keys Controls the up, down, right and left motion of the cursor in the LCD Display window 3 Numeric Keypad Allows entry of numeric data and Clear and Enter function keys 4 Front Panel LED Indicators See Paragraph 4.1.4 below for an itemized description of these LEDs 4.1.
DMD20/DMD20 LBST Universal Satellite Modem Date/ Time Changes Digit Moves Cursor 1 Position Left Moves Cursor 1 Position Right N/A N/A IP Address Changes Digit Increments Decrements Digit Value Digit Value Moves Cursor 1 Position Left Moves Cursor 1 Position Right N/A N/A Text Strings Moves Cursor 1 Position Left Moves Cursor 1 Position Right Clears to Left of Cursor Inclusive Clears to Right of Cursor Inclusive Changes Character N/A N/A User Interfaces Increments Decrements Character Ch
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem 4.2 Parameter Setup The four Cursor Control Arrow Keys are used to navigate the menu tree and select the parameter to be set. After arriving at a parameter that needs to be modified, depress . The first space of the modifiable parameter highlights (blinks) and is ready for a new parameter to be entered. After entering the new parameter using the keypad (Refer to Figure 4-2), depress to lock in the new parameter.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces 4.3.2 Modulator Menu Options and Parameters NETWORK SPEC {IDR, IBS, DROP & INSERT, CLOSED NET, DVB SAT} The Network Spec Command sets a number of parameters within the modem to meet a specification. The purpose is to eliminate keystrokes and potential compatibility problems. Data rates not covered by a given network specification will not be allowed.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem DVB: Per EN301-421 & En301-210 Data Rates: Framing Type: Scrambler Type: Spectrum Mask: All Rates DVB DVB DVB 0.25, 0.35 Closed Net: All possible combinations allowed, however, a DVB setting requires the DVB network spec. Activates the AUPC Menu. STRAP CODE {Refer to Strap Code Guide, Appendix H} The Strap Code is a quick set key that sets many modem parameters. Consult the strap code guide for available strap codes.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces LBST: Spectral inversion may be required if the BUC LO is higher in frequency than the BUC output frequency. When BUC LO is higher than the BUC output frequency, this creates a spectral inversion and the IF Spectrum must be again inverted to compensate. MODULATION {QPSK, BPSK, OQPSK, 8PSK, 16QAM} Allows the user to select the modulation type. SPECTRAL MASK {Intelsat 0.35, DVB SAT 0.35, DVB SAT 0.25, DVB SAT 0.
User Interfaces SCRAMBLER CTRL {ENABLED, DISABLE} Allows the user to enable or disable scrambler operation. SAT FRAMING {1/15 (IBS), 1/15 (Async), 96 Kbps (IDR), DVB, EDMAC, EFAUPC, SCC, EFFICIENT D&I, None} Used with IDR, IBS, or Asynchronous Interface Only. Allows the user to select the framing type. IN-BAND RATE {150, 300, 600, 1200, 2400, 4800, 9600, 19200} Allows the user to select the rate of in-band data for the ES to ES, Async overhead channel.
DMD20/DMD20 LBST Universal Satellite Modem INTERLVR DEPTH User Interfaces {4, 8, 12} Allows the user to select the Reed-Solomon interleaver depth. In Closed Net Mode, a depth of 4 or 8 may be selected. ODU-BUC (menu) FSK COMMS {OFF-NONE/CODAN/TERRASAT/AMPLUS} (Only available when the FSK Comm is Enabled) OFF/NONE: Will disable the FSK Communication link. User must select this option if the BUC does not support FSK or if the customer does not want to utilize the FSK option.
User Interfaces LO FREQ (MHz) DMD20/DMD20 LBST Universal Satellite Modem Allows the user to enter the Local Oscillator frequency of the BUC LO in order for the uplink frequency to be displayed correctly (refer to the BUC manufacturer’s specifications). When utilizing BUC that supports FSK, the modem will display LO frequency as stated by the BUC. 4-10 OSC SIDE BAND {LOW SIDEBAND, HIGH SIDEBAND} Allows the user to select the location of the BUC LO.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces ADDRESS {xxxx} Allows the user to enter the BUCs address for FSK communications. Modem may be able to retrieve address through the FSK Query for Address Test menu. BUC TX ENABLE {Enable/Disable} (Only available when the FSK Comm is Enabled) Enables or Disables the BUC RF Output. FSK TEST {NONE/LOOPBACK/CYCLE TX ENABLE/QUERY FOR ADDRESS/PASS THRU} (Only available when the FSK Comm is Enabled) NONE: This is the none FSK operational mode.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem RADYNE: Enables Radyne Local AUPC Function. In the event the remote demodulator losses lock, the local output power level will adjust itself to the nominal level. This nominal power should be set to a level high enough to re-establish communications regardless of rain fade. NEAR SIDE: Enables NEARSIDE Local AUPC function.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces NEARSIDE: When configured for NEARSIDE AUPC the maximum Transmit Power is the highest power setting that will be used by the local modem when the Eb/No decreases below the Eb/No target. TARGET Eb/No {4.0 to 16 dB} This allows the user to set the desired Eb/No for the local receiver.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem AUPC MODE {DISABLE,NEAR SIDE, EFDATA} Allows the user to enable or disable the AUPC Function of the remote modem. The remote AUPC Function is the response of the local modem to commands for an increase or decrease of the Transmit Power in 0.5 dB steps and the command to change to the setting indicated in the 'REMOTE CL ACTION' Menu of the remote modem upon receiver loss of lock.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces For Data Rates < 1.544 Mbps Framing Type: 1/15 (IBS) Descrambler Type: IESS-309 Spectrum Mask: Intelsat IBS: (IESS-309) For Data Rates < 2.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem IF (menu) FREQUENCY (MHz) {50 – 90 MHz, 100 – 180 MHz, or 950 - 2050 MHz} {950 – 2050 MHz} for LBST} Allows the user to enter the Modulator IF Frequency in 1 Hz increments. DWNLNK FREQ (MHz) Displays the input frequency into the LNB from the satellite, also referred known as Satellite downlink frequency. The user must enter the LNB LO and OSC SIDEBAND of the LNB before using this menu.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces Limitations of Fast Acquistion: The maximum symbol rate for Fast Acquistion is 1028Ksps. Fast Acquistion must be disabled for rates greater than 1028Ksps. Only supports QPSK and 8PSK in a NON-DVB MODE. Does not support spectral inversion applications. INPUT THRESHOLD (dBm) {-30 to 90 dbm} Allows the user to adjust the low level threshold limit for input power.
User Interfaces SCRAMBLER SEL {NONE, V.35-IESS, V.35 CITT, V.35 EF, IBS w/Optional Framing and optional Reed-Solomon, Reed-Solomon Scrambler w/Optional Framing, CCITT, V.35FC, OM-73, V.35EF_RS, TPC SCRAMBLER (Turbo Codec), DVB, EDMAC} Allows the user to select the descrambler type. SCRAMBLER CTRL {ON, OFF} Allows the user to enable or disable the descrambler operation.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces RS RATE {Refer to Table 3-1 for standard n/k values} Displays the currently used n, k Reed-Solomon Codes. In Closed Net Mode and using the appropriate hardware, the user may select custom R-S Codes. INTERLVR DEPTH {4, 8, 12} Allows the user to select the Reed-Solomon interleaver depth.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem 4.3.4 Interface Menu Options and Parameters TX SETUP (menu) CIRCUIT ID Allows the user entry of a Tx Circuit Identifier. Circuits can be given up to an 11 Character alphanumeric identity such as LINK1. TERR INTERFACE STANDARD INTERFACE {RS422 SERIAL,RS232 SERIAL, V.35} OPTIONAL HARDWARE INTERFACES {M2P PARALLEL, DVB PARALLEL, ASI} {HSSI} {ETHERNET 10/100 BASE-T} {G.
DMD20/DMD20 LBST Universal Satellite Modem SCT CLK SRC DROP & INSERT (menu) User Interfaces {SCT, SCR} Allows the user to select SCT Source.SCT is the internally generated SCT clock. SCR is the Rx Satellite clock. SCR is used for loop timing. (Reference Section 3.13, “Drop and Insert Mapping” in this manual) DROP MODE {NONE, T1-D4, T1-ESF, PCM-30, PCM-30C, PCM-31, PCM-31C, T1-D4-S, T1-ESF-S.} Drop mode may only be changed from none when the drop and insert specification is in use.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem TERR INTERFACE STANDARD INTERFACE {RS422 SERIAL,RS232 SERIAL, V.35} OPTIONAL HARDWARE INTERFACES: {M2P PARALLEL, DVB PARALLEL, ASI} {HSSI} {ETHERNET 10/100 BASE-T} {G.703: T1 AMI, T1 B8ZS, , E1 BAL, E1 UNBAL, T2 BAL, T2 UNBAL, E2} BUFF SIZE (msec) BUFFER CLK SRC Allows the user to select the Transmit Interface {0 - 64 msecs} Allows the user to set the Doppler Buffer Size in msec. The user must assign priorities to the clock sources.
DMD20/DMD20 LBST Universal Satellite Modem SAT CH TERRCH {1-31 User Interfaces 1-31} The up/down arrow keys allow you to traverse the sat terr pairings. The slot numbers may be edited using the keypad. Allows the user to edit the Tx Edit map and specify the terrestrial slots that will be dropped into the assigned satellite channels. The satellite channels are fixed and the number of channels is determined by the data rate. The terrestrial time slots available are determined by the drop mode.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem GENERAL (menu) EXT FREQ (MHz) {Variable Through Data Rate} Allows the user to select the external clock frequency in MHz. REF FREQ SRC {INTERNAL, EXTERNAL, HIGH STABILITY} Allows the user to select the Frequency Reference Source. High Stability is only displayed if the appropriate hardware is detected. REF FREQ (MHz) Allows the user to select the reference clock frequency in MHz.
DMD20/DMD20 LBST Universal Satellite Modem ES BITS/CHAR User Interfaces {7, 8} Allows the user to choose between 7 or 8 bit data. RX ES ENHANCED (menu) RX ASYNC MODE {ES-ES, ESC ENHANCED} ES-ES is displayed when IBS Network Spec is selected. ESC Enhanced can be selected in Closed Net and uses the Overhead Signaling bytes in the IBS Overhead to pass asynchronous data. This menu is not available when SCC is selected. ES INTERFACE {RS-232, RS-485} Allows the user to select the interface type.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem RAW BER Displays the estimated channel error rate (before decoding) measured by the modem. 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**.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces JS1 PORT {See the note above} Displays the current status of the LAN Port. JS2 PORT {See the note above} Displays the current status of the LAN Port. JS3 PORT {See the note above} Displays the current status of the LAN Port. JS4 PORT {See the note above} Displays the current status of the LAN Port. WAN STATUS {See the note above} Displays the current status of the WAN Port. VOLTAGES (menu) +1.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem The ODU- BUC status menus are only displayed when BUC supports FSK and information is supplied by the BUC. RX BUFFER LEVEL {0 – 100%} Displays the status of the Doppler Buffer. RX BUFFER RESET ((ENTER)) Allows the user to re-center the Doppler Buffer when is pressed on the keypad. 4-28 TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces 4.3.6 Alarms Menu Options and Parameters Masking alarms may cause undesirable modem performance. CURRENT ALARMS (menu) TX MAJOR (menu) Status Edit Table FPGA CFG {Pass/Fail, Unmasked/Masked} Indicates a transmit FPGA configuration failure. DSP CFG {Pass/Fail, Unmasked/Masked} Indicates a transmit DSP configuration failure. SCT CLOCK PLL {Pass/Fail, Unmasked/Masked} Indicates that the Tx SCT Clock PLL is not locked.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem FORCED ALARM {DISABLED, ENABLED} Allows user to disable or enable forcing of a Tx Summary Alarm. TX MINOR (menu) TERR CLK ACT {Pass/Fail, Unmasked/Masked} Indicates no Terrestrial Clock activity. TERR DATA ACT {Pass/Fail, Unmasked/Masked} Indicates no Tx Data activity. TX TERR AIS {Pass/Fail, Unmasked/Masked} Indicates that AIS has been detected in the Tx Data Stream.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces RX MAJOR (menu) FPGA CFG {Pass/Fail, Unmasked/Masked} Indicates a receive FPGA hardware failure. DSP CFG {Pass/Fail, Unmasked/Masked} Indicates a receive DSP failure. SIGNAL LOCK {Pass/Fail, Unmasked/Masked} Indicates that the demod is unable to lock to a signal. INPUT LVL THRESH {Pass/Fail, Unmasked/Masked} Indicates Rx signal level has fallen below input threshold.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem RX MINOR (menu) 4-32 BUFF UNDERFLOW {Pass/Fail, Unmasked/Masked} Indicates that a Doppler Buffer underflow has occurred. BUFF NEAR EMPTY {Pass/Fail, Unmasked/Masked} Indicates that the Doppler Buffer is about to underflow. BUFF NEAR FULL {Pass/Fail, Unmasked/Masked} Indicates that the Doppler Buffer is about to overflow. BUFF OVERFLOW {Pass/Fail, Unmasked/Masked} Indicates that a Doppler Buffer overflow has occurred.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces RX AGC LEVEL {Pass/Fail, Unmasked/Masked} Indicates if Rx level is below allowable limits. IBS BER {Pass/Fail, Unmasked/Masked} Indicates that there are more than one in 1000 bits in error in IBS Mode. RX DVB FRM LOCK {Pass/Fail, Unmasked/Masked} Indicates that the Rx Satellite Data Stream Framing is not DVB. COMMON (menu) TERR FPGA CFG {Pass/Fail, Unmasked/Masked} Indicates an Interface Card FPGA configuration failure.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem +5V SUPPLY {Pass/Fail, Unmasked/Masked} Displays the measured voltage of the +5 Volt power bus located inside the modem. +12V SUPPLY {Pass/Fail, Unmasked/Masked} Displays the measured voltage of the +12 Volt power bus located inside the modem. +20V SUPPLY {Pass/Fail, Unmasked/Masked} Displays the measured voltage of the +20 Volt power bus located inside the modem.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces TX CLKSRC FALLBK BUC PLL BUC OVER TEMP BUC SUMMARY BUC OUTPUT FSK COMMS RX MAJOR (menu) FPGA CFG DSP CFG SIGNAL LOCK INPUT LVL THRESH FRAME LOCK MULTIFRAME LOCK LB SYNTH PLL IF SYNTH PLL ETHERNET WAN LNB CURRENT LNB VOLTAGE RX MINOR (menu) BUFF UNDERFLOW BUFF NEAR EMPTY BUFF NEAR FULL BUFF OVERFLOW RX DATA ACTIVITY SAT AIS DnI FRAME LOCK DnI M-FRAME LOCK INSERT CRC TM103 – Rev. 2.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem T1/E1 SIGNALING IFEC LOCK OFEC LOCK INTERLEAVER RS UNCORR. WORD TPC IFEC LOCK EBNO RX AGC LEVEL RX LEVEL IBS BER RX DVB FRM LOCK COMMON (menu) TERR FPGA CFG CODEC FPGA CFG CODEC DEV CFG EXT CLOCK ACT EXT REF ACT EXT REF LOCK ETHERNET WAN VOLTAGE (menu) +1.5V RX SUPPLY +1.5V TX SUPPLY +3.3V SUPPLY +5V SUPPLY +12V SUPPLY -12V SUPPLY +20V SUPPLY 4-36 TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces CLEAR LATCHED ((ENTER)) Allows the user to reset the latched alarms by pressing on the keypad. BACKWARD ALARMS The following IBS and IDR Backward alarms only apply if the IDR or IBS options are selected. The IBS and IDR Backward Alarms are transmitted and received from the distant end of the satellite link NOTE: The following alarms identify the status of the alarms received from the distant satellite end.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem IBS SAT CNTRL {STNDRD, FRC ON, FRC OFF} T1E1 TERR CNTRL {STNDRD, FRC ON} IBS TX PROMPT {STNDRD, FRC ON} IBS TX SERVICE {STNDRD, FRC ON} 4.3.7 System Menu Options and Parameters DATE (MM/DD/YY) Allows the user to enter the current date. TIME {HH:MM:SS} Allows the user to enter the current time. CONFIG COPY {Current, CFG1……CFG10} Allows user to copy, save and recall modem configurations.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces REMOTE PORT (menu) ADDRESS {32 - 255} Allows the user to enter the Remote Port Multidrop Address. BAUD RATE {300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200} Allows the user to enter the Remote Port Baud Rate. INTERFACE {RS-232, RS-485} Allows the user to enter the Remote Port interface type.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem MODEM HOST The Host Modem for the network. IP ADDR MASK {XXX.XXX.XXX.XXX} Hexidecimal Mask {ddd.ddd.ddd.ddd} Decimal Mask 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. MODEM IP ADDR {XXX.XXX.XXX.XXX} Hexidecimal Address {ddd.ddd.ddd.ddd} Decimal Mask The IP Address of the modem.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces MODEM EADDR {001065010000} Displays the Ethernet address of the device. Set at the factory and is a unique identifier for the Ethernet physical interface. ETHER RATE {10 MBPS/HD} The data rate for the local Ethernet Interface. 10 Mbps/HD – for 10 Base-T in either half-duplex or full duplex. SNMP (menu) SNMP VERSION A description of OID organization is provided in the MIB portion of this manual (Appendix C).
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem RD COMMUNITY {16 characters of name} This menu is only displayed when SNMP VERSION is set to V1 & V2. This is the community that a host must be acting within when an OID variable is requested by a V1/V2 SNMP message. RDWR COMMUNITY {16 characters of name} This menu is only displayed when SNMP VERSION is set to V1 & V2. This is the community that a host must be acting within when an OID variable is being changed by a V1/V2 SNMP message.
DMD20/DMD20 LBST Universal Satellite Modem AUTH PASSWORD USER RESET User Interfaces {xxxxxxxx} User to select password. The user can modify the Authorization Passwords. The user name can have up to 14 characters supporting alpha and numeric characters. Alpha characters can be entered using the up and down arrow keys. Numeric characters can be selected by using the number keys on the front panel. The user can clear all characters from the front panel screen. Resets group and password.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem Oper: Users can monitor and control parameter settings, and change their own authentication passwords. Admin: At this highest access right, the users can monitor and control the modems parameters, change any user’s name and authentication password, and modify IP network settings. Admin setting allows access to the entire site. AUTH PASSWORD {xxxxxxxx} User to select password. The user can modify the Authorization Passwords.
DMD20/DMD20 LBST Universal Satellite Modem SOFT RESET IF BOARD (menu) AGC/CTRL/VALUE User Interfaces {Enter} Indicates the Radyne Assembly. part number for the IF Board I OFFSET {0% - 100%} Allows the user to adjust the internal frequency reference for calibration. Only displayed if the system reference clock source is HI STABILITY. Used for factory test only. Q OFFSET Used for factory test only. IF RX LVL OFFSET Used for factory test only. LB RX LVL OFFSET Used for factory test only.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem RXIF RXLBAND TXIF TXLBAND ENH ASYNC IDR SEQ RS RS CUSTOM IBS D&I AUPC 8PSK 16QAM TURBO 52 MBPS OM73 SCRAMBLING DVB EDMAC 4.3.8 Test Menu Options and Parameters TX TEST PATTERN {NONE, 2047, 2^15-1, 2^23-1} Allows the user to enable the tests listed above. RX TEST PATTERN {NONE, 2047, 2^15-1, 2^23-1} Allows the user to enable the tests listed above. PATTERN SYNC {YES, NO} Yes indicates that the RX Test Pattern is in sync.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces LOOPBACK WITH ETHERNET DATA INTERFACE Usage of the modems loopback capabilities in conjunction with the Ethernet data interface can produce undesirable network loops. In order to run any type of data test with an Ethernet interface you must utilize two modems connected back to back. Simply using one modem and a loopback will not produce the desired results.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem POS FIR: For manufacturer’s use only. NEG FIR: For manufacturer’s use only. IQ SAMPLING {ENABLE/DISABLE} Allows the user to enable the I & Q pattern on the Web Browser Interface. IQ SPCTRM SMPLING {ENABLE, DISABLE} Allows the user to enable the Frequency Spectrum pattern on the Web Browser. IQ SPCTRM BAND {NARROW, WIDE} Allows user to set the frequency spectrum width to narrow or wide based on frequency bandwidth. 4-48 TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem User Interfaces 4.4 Terminal Mode Control The Terminal Mode Control allows the use of an external terminal or computer to monitor and control the modem from a full screen interactive presentation operated by the modem itself. No external software is required other than VT-100 Terminal Emulation Software (e.g. “Procomm” for a computer when used as a terminal. The Control Port is normally used as an RS–232 Connection to the terminal device.
User Interfaces DMD20/DMD20 LBST Universal Satellite Modem 4.5 Terminal Port User Interface The Remote Port (J20) of the modem allows for complete control and monitoring of all parameters and functions via an RS-232 Serial Interface, or RS-485 for RLLP Protocol. ‘Terminal Mode’ can be entered from the front panel by selecting “System” and then “Control Mode” followed by “Terminal”. The baud rate and evaluation type can be changed at the front panel by using the System>Baud Rate Menu.
DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces Rear Panel Interfaces 5 This section discusses the electrical interfaces available from the rear panel. All locations are as viewed from the rear of the unit unless otherwise specified. 5.0 DMD20/DMD20 LBST Connections All DMD20/DMD20 LBST connections are made to labeled connectors located on the rear of the unit (refer to Figure 5-1 for the DMD20 and Figure 5-2 for the DMD20 LBST).
Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem Figure 5-1. DMD20 Universal Satellite Modem Rear Panel Configurations 5-2 TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces Figure 5-2. DMD20 LBST Universal Satellite Modem Rear Panel Configurations TM103 – Rev. 2.
Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 5.1 Compact Flash The compact flash slot is located on the right side as viewed from the rear of the unit. A 128 or 256 Mbit flash memory card that stores all the modem M&C and operational data. It must be present when the modem is operating. 5.2 Power Input Modules 5.2.1 AC Power Input Module AC Input Module (Figure 5-1) is located on the left side of the unit.
DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 5.3.5 RX L-Band IF The Receive IF Input Port is a 50-Ohm SMA Female Connector that can be used for L-Band IF. The IF Frequency can be programmed from 950 to 1750 MHz in 1 Hz Steps. 5.3.6 ALARM (J15) The Alarm Port is a 15-Pin Female “D” Connector. The Alarm port utilizes contact closures to identify the status of the modem. Front panel selections allow the user to select the utilization of the contact closures.
Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem Note 1: Normally open, or Normally closed, conditions indicate a faulted state or off condition. Note 2: Prompt alarms can be configured to support a summary of a) Prompt alarms, b) Prompt and Tx Minor alarms, or c) Prompt and Tx minor and Tx Major Alarms. Note 3: Service alarms can be configured to support a summary of a) Service alarms, b) Service and Rx Minor alarms, or c) Service and Rx minor and Rx Major Alarms.
DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 5.3.10 EIA-530 (J19) The EIA-530 Port is an RS-422/V.35/RS-232 Connection. It is a 25-Pin Female “D” Connector. Refer to Table 5-4 for pinouts. Table 5-4. EIA-530 Port (RS-422/V.35/RS-232) 25-Pin Female “D” Connector (J19) Pin No.
Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 5.3.11 REMOTE (J20) The Remote Port is a RS-485 or RS-232 Connection for remote monitor and control of the modem. It is a 9-Pin Female “D” Connector. Refer to Table 5-5 for pinouts. Table 5-5. Remote Port (RS-485 or RS-232) 9-Pin Female “D” Connector (J20) Pin No.
DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 5.4.2 TX (J11) The Transmit Output Port is a 50-Ohm Type-N Connector. 5.4.3 RX (J14) The Receive Input Port is a 50-Ohm Type-N Connector. 5.4.4 ALARM (J15) The Alarm Port is a 15-Pin Female “D” Connector. The Alarm port utilizes contact closures to identify the status of the modem. Front panel selections allow the user to select the utilization of the contact closures. Refer to Table 5-2 for pinouts.
Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem Note 1: Normally open, or Normally closed, conditions indicate a faulted state or off condition. Note 2: Prompt alarms can be configured to support a summary of a) Prompt alarms, b) Prompt and Tx Minor alarms, or c) Prompt and Tx minor and Tx Major Alarms. Note 3: Service alarms can be configured to support a summary of a) Service alarms, b) Service and Rx Minor alarms, or c) Service and Rx minor and Rx Major Alarms.
DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 5.4.8 EIA-530 (J19) The EIA-530 Port is an RS-422/V.35/RS-232 Connection. It is a 25-Pin Female “D” Connector. Refer to Table 5-8 for pinouts. Table 5-8. EIA-530 Port (RS-422/V.35/RS-232) 25-Pin Female “D” Connector (J19) Pin No.
Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 5.4.9 REMOTE (J20) The Remote Port is a RS-485 or RS-232 Connection for remote monitor and control of the modem. It is a 9-Pin Female “D” Connector. Refer to Table 5-9 for pinouts. Table 5-9. Remote Port (RS-485 or RS-232) 9-Pin Female “D” Connector (J20) Pin No.
DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 5.5 DMD20/DMD20 LBST Optional Data Interfaces 5.6 IDR/IBS Interface (Optional) Refer to Figures 5-1 and 5-2 for rear panel configurations. 5.7 G.703 IDR/IBS Interface (Optional) The DMD20 supports G703 IDR/IBS interface. Interface options supported are G703 T1/E1/T2/E2 5.7.1 ESC ALARM (J1) The ESC (Engineering Service Circuits) Alarms Port is a 25-Pin Female “D” Connector. Refer to Table 5-6 for pinouts. Table 5-6.
Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 24 No Connection NC --- 25 No Connection NC --- 5.7.2 64K AUDIO (J2) The 64K AUDIO Port allows for communications between Earth Stations. It is a 9-Pin Female “D” Connector that complies with IESS 308. Refer to Table 5-7a for pinouts in audio mode and Table 5-7b for pinouts in 64k mode. Table 5-7a. 64K AUDIO (In Audio Mode) Port 9-Pin Female “D” Connector (J2) Pin No.
DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 5.7.3 8K DATA (J3) The 8K Data Port allows for communications between Earth Stations. It is a 15-Pin Female “D” Connector that complies with IESS 308. Refer to Table 5-8 for pinouts. Table 5-8. 8K DATA Port 15-Pin Female “D” Connector (J3) Pin No.
Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 10 No Connection --- --- 11 Receive Data B (+) RD-B Output 12 Drop Data Out (-) DDO-A Output 13 Insert Data In (-) EXC (-) IDI-A Input 14 Mod Fault MOD-FLT Open Collector Output 15 Demod Fault DMD-FLT Open Collector Output 5.7.5 SWITCH INTERFACE (J5) The Switch Interface Port is a 68-Pin High-Density Female Connector. Refer to Table 5-10 for pinouts. Table 5-10.
DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 15 IDR ESC Audio Input Channel 1A ESCAUDTX 1A Input 16 IDR ESC Audio Input Channel 2A ESCAUDTX 2A Input 17 IDR ESC Audio Output Channel 1A ESCAUD RX 1A Output 18 IDR ESC Audio Output Channel 2A ESCAUD RX 2A Output 19 IDR ESC Backward Alarm Input - 3 ESCBWI 3 Input 20 IBS ES Transmit Data A IDR ESC Backward Alarm Input 1 TXD-A BWI 1 Input 21 Mod Fault Open Collector Output MOD FLT Output Open Collector 22 IBS ES R
Rear Panel Interfaces 5-18 40 IDR ESC Backward Alarm Out - 2 Common 41 Synchronous Data Terminal Timing – B 42 DMD20/DMD20 LBST Universal Satellite Modem ESCBWO 2C No Direction SYNC TT-B Input IDR ESC Backward Alarm Output - 2 Normally Open ESCBWO 2NO No Direction 43 G.703 Drop Data Out - B Synchronous Data Receive Timing – B DDO-B RT-B Output 44 IDR ESC Backward Alarm Out - 3 Normally Closed ESCBWO 3NC No Direction 45 G.
DMD20/DMD20 LBST Universal Satellite Modem 62 IDR ESC Backward Alarm Out - 4 Normally Open 63 IBS Transmit Octet Input - B 64 Rear Panel Interfaces ESCBWO 4NO No Direction TXO-B Input Synchronous Data – Data Mode Out - B SYNC DM-B Output 65 Synchronous Data - Clear to Send - B SYNC CS-B Input 66 IBS Receive Octet Output - B RXO-B Output 67 Synchronous Data Request to Send – B SYNC RS-B Input 68 Synchronous Data Receiver Ready - B SYNC RR-B Output 5.7.
Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 5.9 High-Speed Serial Interface (HSSI) (Optional) 5.9.1 HSSI (J6) The HSSI (High-Speed Serial Interface) (J6) complies with the HSSI Functional and Electrical Specifications. The physical interface is a 50-Pin SCSI-2 Type Connector. Electrical levels are ECL. Gapped clocking not supported. The pinouts for this interface are listed in Table 5-11. Table 5-11. J9 – HSSI (High-Speed Serial Interface) 50-Pin Connector Pin No. (+) Pin No.
DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 5.10.3 DVB/M2P IN (J3) DVB or M2P IN Port (J3) is supported on the DB-25 female connector. It complies with RS-422 Electrical Specifications. Refer to Table 5-12a for DVB and 5-12 b for M2P pinouts for this connector. Table 5-12a.
Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem Table 5-12b.
DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 5.10.4 DVB/M2P OUT (J4) The DVB or M2P OUT Port (J4) is also supported on the DB-25 Female Connector. It complies with RS-422 Electrical Specifications. Refer to Table 5-13a for DVB and 5-13 b for M2P pinouts for this connector. Table 5-13a.
Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem Table 5-13b.
DMD20/DMD20 LBST Universal Satellite Modem 5.11 Rear Panel Interfaces Ethernet Data Interface (Optional) The optional modem Ethernet Data Interface provides four RJ-45 10/100 Base-T interface. The Ethernet interface supports Auto-Crossover and Auto-Sensing. The Ethernet port are referred to as JS1 through JS4. JS1 is Port 1 JS2 is Port 2 JS3 is Port 3 JS4 is Port 4 Refer to Figure 5-1 for outline drawings and Appendix J for setup & configuration. 5.12 HSSI / G.
Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 5.12.1 64K AUDIO (J2) The 64K AUDIO Port allows for communications between Earth Stations. It is a 9-Pin Female “D” Connector that complies with IESS 308. Refer to Table 5-15a for pinouts in audio mode and Table 5-15b for pinouts in 64k mode. Table 5-15a. 64K AUDIO (In Audio Mode) Port 9-Pin Female “D” Connector (J2) Pin No.
DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 5.12.2 8K DATA (J3) The 8K Data Port allows for communications between Earth Stations. It is a 15-Pin Female “D” Connector that complies with IESS 308. Refer to Table 5-16 for pinouts. Table 5-16. 8K DATA Port 15-Pin Female “D” Connector (J3) Pin No.
Rear Panel Interfaces DMD20/DMD20 LBST Universal Satellite Modem 10 No Connection --- --- 11 Receive Data B (+) RD-B Output 12 Drop Data Out (-) DDO-A Output 13 Insert Data In (-) EXC (-) IDI-A Input 14 Mod Fault MOD-FLT Open Collector Output 15 Demod Fault DMD-FLT Open Collector Output 5.12.4 ESC ALARM (J5) The ESC (Engineering Service Circuits) Alarms Port is a 25-Pin Female “D” Connector. Refer to Table 5-18 for pinouts. Table 5-18.
DMD20/DMD20 LBST Universal Satellite Modem Rear Panel Interfaces 23 Backward Alarm In – 3 ESCBWI 3 Input 24 No Connection NC --- 25 No Connection NC --- 5.12.5 SD (DDI) (J6) The Send Data (Drop Data In) Port (Unbalanced) is a 75-Ohm Female BNC Connector. 5.12.6 DDO (J7) The Drop Data Out Port (Unbalanced) is a 75-Ohm Female BNC Connector. 5.12.7 IDI (J8) The Insert Data In Port (Unbalanced) is a 75-Ohm Female BNC Connector. 5.12.
Rear Panel Interfaces 5.14 DMD20/DMD20 LBST Universal Satellite Modem 25 N/A MOD_FLT Alarm Output 50 N/A DMD_FLT Alarm Output Ethernet Data Interface The optional Ethernet Data Interface provides four RJ-45 10/100 Base-T interface. The Ethernet interface supports Auto-Crossover and Auto-Sensing. The Ethernet port are referred to as JS1 through JS4. JS1 is Port 1 JS2 is Port 2 JS3 is Port 3 JS4 is Port 4 Refer to Figure 5-1 and 5-2 for outline and Appendix I for setup & configuration. 5.
DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Maintenance and Troubleshooting 6 Maintenance and Troubleshooting This section discusses unit maintenance and troubleshooting for the Universal Satellite Modem. The DMD20/DMD20 LBST contains a Lithium Battery. EXPLOSION exists if the battery is incorrectly replaced. with the same or equivalent type recommended by the Dispose of used batteries in accordance with local regulations. DANGER OF Replace only manufacturer. and national 6.
Maintenance and Troubleshooting Symptom The Modem will not acquire the incoming carrier: DMD20/DMD20 LBST Universal Satellite Modem Possible Cause There is an improper receive input to modem. The Receive Carrier Level is too low. The Receive Carrier Frequency is outside of the acquisition range. The Transmit Carrier is incompatible. Modem is in Test Mode. The Async Port is not configured correctly. The switches may not be set in the correct positions. 6.1.1 Alarm Faults 6.1.1.
DMD20/DMD20 LBST Universal Satellite Modem Maintenance and Troubleshooting 6.1.1.2 Major Rx Alarms Alarm Possible Cause FPGA CFG Indicates a receive FPGA hardware failure. DSP CFG Indicates a receive DSP failure. SIGNAL LOCK Indicates that the demod is unable to lock to a signal. FRAME LOCK Indicates that the Framing Unit is unable to find the expected framing pattern. MULTIFRAME LOCK Indicates that the Framing Unit is unable to find the expected framing pattern.
Maintenance and Troubleshooting DMD20/DMD20 LBST Universal Satellite Modem 6.1.1.4 Minor Rx Alarms Alarm Possible Cause BUFF UNDERFLOW Indicates that a Doppler Buffer underflow has occurred. BUFF NEAR EMPTY Indicates that the Doppler Buffer is about to underflow. BUFF NEAR FULL Indicates that the Doppler Buffer is about to overflow. BUFF OVERFLOW Indicates that a Doppler Buffer overflow has occurred. RX DATA ACTIVITY Indicates that there is no Rx Data activity.
DMD20/DMD20 LBST Universal Satellite Modem Maintenance and Troubleshooting 6.1.1.5 Drop and Insert Alarms Alarm Possible Cause Multiframe Lock The insert framer is not in sync. CRC Lock An Insert CRC Fault occurred. Valid in T1-ESF, PCM-30, or PCM30C Modes. T1 Signaling An Insert T1 Yellow Fault occurred. Valid in T1-ESF, T1D4, or SCL96 Modes. E1 FAS (E1 Frame Acquisition Sync) An E1 FAS Fault occurred. Valid in PCM-30, or PCM-30C, PCM-31, or PCM-31C Modes.
Maintenance and Troubleshooting DMD20/DMD20 LBST Universal Satellite Modem 6.1.2 Alarm Masks The modem performs a high degree of self-monitoring and fault isolation. The alarms for these faults are separated into the following three categories: Active Alarms Common Equipment Alarms Backward Alarms A feature exists that allows the user to ‘Mask’ out certain alarms as explained below. Masking alarms may cause undesirable modem performance.
DMD20/DMD20 LBST Universal Satellite Modem Maintenance and Troubleshooting 6.1.2.3 Backward Alarms Backward Alarms are alarms that are fed back to or received from the other end of the satellite link. In IBS Mode (including Drop & Insert), Backward Alarm 1 is the only one used. It would be received if the distant end demod drops lock. 6.
Maintenance and Troubleshooting DMD20/DMD20 LBST Universal Satellite Modem Table 6-1.
DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Technical Specifications Technical Specifications 7 7.0 Data Rates Refer to Section 7.17. 7.1 Modulator Modulation IF Tuning Range L-Band Tuning Range Impedance Connector Return Loss Output Power Output Stability Output Spectrum Spurious On/Off Power Ratio Scrambler FEC Outer Encoder Options Data Clock Source Internal Stability TM103 – Rev. 2.
Technical Specifications DMD20/DMD20 LBST Universal Satellite Modem 7.
DMD20/DMD20 LBST Universal Satellite Modem Technical Specifications 7.5 DMD20/DMD20 LBST Drop and Insert (Optional) Terrestrial Data Line Coding Framing Time Slot Selection Time Slots Data Rates Efficient D&I Time Slots 1.544 Mbps or 2.048 Mbps, G.732/733 AMI or B8ZS for T1 and HDB3 for E1 D4, ESF and PCM-30 (PCM-30C) or PCM-31 (PCM- 31C) for E1 n x 64 Contiguous or Arbitrary Blocks for Drop or Insert.
Technical Specifications DMD20/DMD20 LBST Universal Satellite Modem 7.12 Ethernet Data Interface (Optional) Ethernet Data Interface Four RJ-45, Auto-Crossover, Auto-Sensing, 10/100 Ethernet Data Ports. Complies with IEEE 802.3 and IEEE 802.3u. 7.13 Gigi Ethernet Data Interface (Optional) Ethernet Data Interface 7.14 HSSI / G703 HSSI G.703 T1 (DSX1) G.703 E1 G.703 T2 (DSX2) G.703 E2 7.15 Three RJ-45, Auto-Crossover, Auto-Sensing, 10/100/1000 Ethernet Data Ports. Complies with IEEE 802.
DMD20/DMD20 LBST Universal Satellite Modem 7.18 Technical Specifications DMD20/DMD20 LBST Data Rate Limits 7.18.1 Non-DVB Modulation Code Rate Min Data Rate Max Data Rate BPSK NONE 4800 10000000 BPSK VIT 1/2 2400 5000000 BPSK VIT 3/4 3600 7500000 BPSK VIT 7/8 4200 8750000 BPSK SEQ 1/2 2400 2048000 BPSK SEQ 3/4 3600 2048000 BPSK CSEQ 3/4 3600 2048000 BPSK SEQ 7/8 4200 2048000 BPSK TPC 21/44 2400 4772727 BPSK TPC .495 2376 4900000 BPSK TPC .
Technical Specifications DMD20/DMD20 LBST Universal Satellite Modem 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 TPC .495 4752 6312000 OQPSK TPC .793 7612 6312000 8PSK TRE 2/3 9600 20000000 8PSK TPC 3/4 10800 20000000 8PSK TPC 7/8 12600 20000000 8PSK TPC .495 9504 6312000 8PSK TPC .
DMD20/DMD20 LBST Universal Satellite Modem Technical Specifications 188 Mode Modulation Code Rate Min Data Rate Max Data Rate BPSK VIT 1/2 2400 4607843 BPSK VIT 2/3 2950 6143790 BPSK VIT 3/4 3318 6911764 BPSK VIT 5/6 3687 7679738 BPSK VIT 7/8 3871 8063725 QPSK VIT 1/2 4424 9215686 QPSK VIT 2/3 5899 12287581 QPSK VIT 3/4 6636 13823529 QPSK VIT 5/6 7373 15359477 QPSK VIT 7/8 7742 16127450 8PSK TRE 2/3 8848 18431372 8PSK TRE 5/6 11059 20000000 8PSK TRE 8/9
Technical Specifications DMD20/DMD20 LBST Universal Satellite Modem 7.19 BER Specifications 7.19.1 BER Performance (Viterbi) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Viterbi Decoder Typical Performance 1E-3 BER 1E-4 1E-5 1E-6 Specification 1/2 Rate 1E-7 Specification 3/4 Rate 1E-8 Specification 7/8 Rate 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Note: Eb/No values include the effect of using Differential Decoding and V.35 descrambling. Figure 7-1.
DMD20/DMD20 LBST Universal Satellite Modem Technical Specifications 7.19.2 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 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 Note: Eb/No values include the effect of using Differential Decoding and V.35 descrambling. Figure 7-2. B/O/QPSK BER Performance (Sequential) TM103 – Rev.
Technical Specifications DMD20/DMD20 LBST Universal Satellite Modem 7.19.3 BER Performance (Viterbi with Reed-Solomon) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Viterbi Decoder Reed Solomon Typical Performance 1E-3 BER 1E-4 1E-5 Specification 1/2 Rate 1E-6 Specification 3/4 Rate 1E-7 1E-8 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Note: Eb/No values include the effect of using Differential Decoding. Figure 7-3. B/O/QPSK BER Performance (Viterbi w/R-S) 7-10 TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Technical Specifications 7.19.4 BER Performance ((O)QPSK Turbo) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Turbo Decoder Specification Turbo 3/4 1E-3 1E-4 BER Specification Turbo 1/2 Specification Turbo 7/8 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 7-4. BPSK (O)QPSK BER Performance (Turbo) TM103 – Rev. 2.
Technical Specifications DMD20/DMD20 LBST Universal Satellite Modem 7.19.5 BER Performance (B/O/QPSK Turbo) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Turbo Decoder Typical Performance 1E-3 BER 1E-4 1E-5 1E-6 Specification Turbo 0.495 1E-7 Specification Turbo 0.793 1E-8 1E-9 0 1 2 3 4 5 6 7 8 9 10 11 12 Eb/No in dB Note: Eb/No values include the effect of using interleaving and maximum iterations. Figure 7-5. B/O/QPSK BER Performance (Turbo) 7-12 TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Technical Specifications 7.19.6 BER Performance (8PSK Turbo) 1E-1 8PSK Uncoded Theory 1E-2 Turbo Decoder Specification Turbo 3/4 1E-3 Specification Turbo 7/8 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 7-6. BPSK 8PSK BER Performance (Turbo) TM103 – Rev. 2.
Technical Specifications DMD20/DMD20 LBST Universal Satellite Modem 7.19.7 BER Performance (8PSK Trellis) 1E-1 8PSK Uncoded Theory Trellis Decoder 1E-2 Typical Performance 1E-3 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 Note: Eb/No values include the effect of using Differential Decoding and V.35 Descrambling. Figure 7-7. 8PSK BER Performance (Trellis) 7-14 TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Technical Specifications 7.19.8 BER Performance (8PSK Turbo) 1E-1 8PSK Uncoded Theory Turbo Decoder 1E-2 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 Note: Eb/No values include the effect of using interleaving and maximum iterations. Figure 7-8. 8PSK BER Performance (Turbo) TM103 – Rev. 2.
Technical Specifications DMD20/DMD20 LBST Universal Satellite Modem 7.19.9 BER Performance (16QAM Viterbi) 1E-1 16QAM Uncoded Theory Viterbi Decoder 1E-2 Typical Performance 1E-3 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 Note: Eb/No values include the effect of using Differential Decoding and V.35 Descrambling. Figure 7-9. 16QAM BER Performance (Viterbi) 7-16 TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Technical Specifications 7.19.10 BER Performance (16QAM Viterbi with Reed-Solomon) 1E-1 16QAM Uncoded Theory Viterbi Decoder Reed Solomon 1E-2 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 Note: Eb/No values include the effect of using Differential Decoding. Figure 7-10.
Technical Specifications DMD20/DMD20 LBST Universal Satellite Modem 7.19.11 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 Note: Eb/No values include the effect of using interleaving and maximum iterations. Figure 7-11. BPSK 16QAM BER Performance (Turbo) 7-18 TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Technical Specifications 7.19.12 BER Performance (16QAM Turbo) 1E-1 16QAM Uncoded Theory 1E-2 Turbo Decoder Specification Turbo 3/4 1E-3 Specification Turbo 7/8 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 7-12. BPSK 16QAM BER Performance (Turbo) TM103 – Rev. 2.
Technical Specifications BER 1E-3 1E-4 1E-5 1E-6 1E-7 1E-8 1E-9 1E-10 DMD20/DMD20 LBST Universal Satellite Modem 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 7/8 Rate 4.2 dB 5.3 dB 6.2 dB 3.9 dB 4.9 dB 5.8 dB 4.8 dB 6.1 dB 7.1 dB 4.5 dB 5.6 dB 6.5 dB 5.5 dB 6.8 dB 7.9 dB 5.1 dB 6.3 dB 7.2 dB 6.1 dB 7.6 dB 8.6 dB 5.7 dB 7 dB 7.9 dB 6.7 dB 8.3 dB 9.3 dB 6.2 dB 7.7 dB 8.6 dB 7.4 dB 8.9 dB 10.2 dB 6.8 dB 8.4 dB 9.4 dB 8.2 dB 9.7 dB 11 dB 7.
DMD20/DMD20 LBST 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.
Technical Specifications DMD20/DMD20 LBST Universal Satellite Modem 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.
DMD20/DMD20 LBST Universal Satellite Modem Technical Specifications Table 7-10 - (O)QPSK BER Performance (Turbo) Specification Typical Turbo 1/2 Turbo 3/4 Turbo 7/8 Turbo 1/2 Turbo 3/4 Turbo 7/8 TBD 3.2 dB 4 dB TBD 2.8 dB 3.7 dB TBD 3.4 dB 4.1 dB TBD 3 dB 3.8 dB 2.7 dB 3.6 dB 4.2 dB 2.4 dB 3.2 dB 3.9 dB 2.9 dB 3.8 dB 4.3 dB 2.6 dB 3.4 dB 4 dB 3.1 dB 4.1 dB 4.4 dB 2.8 dB 3.7 dB 4.1 dB 3.3 dB 4.4 dB 4.5 dB 3 dB 4 dB 4.
Technical Specifications DMD20/DMD20 LBST Universal Satellite Modem 7.19.13 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. AGC Voltage Monitor 7-24 TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Appendix A Product Options A A.0 Hardware Options The following enhanced interface cards are available. A.0.1 G.703/IDR ESC Interface The modem can be equipped with G.703 T1/E1/T2/E2 /IDR ESC Interface A.0.2 Internal High Stability The modem can be equipped with a 5x10-8 or better Stability Frequency Reference as an add-on enhancement. This is a factory upgrade only. A.0.
Appendix A DMD20/DMD20 LBST Universal Satellite Modem A.0.9 HSSI / G.703 High-Speed Serial Interface 50-Pin SCSI-2 Type Connector. Complies with Cisco Systems in HSSI Design Specification, Revision 3.0. The G.703 interface supports T1, E1, T2, E2 rates balanced or unbalanced. It does not support backward alarms. A.0.10 HSSI / ETHERNET High-Speed Serial Interface 50-Pin SCSI-2 Type Connector. Complies with Cisco Systems in HSSI Design Specification, Revision 3.0.
DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Front Panel Upgrade Procedure Appendix B B B.0 Introduction The Universal Satellite Modem offers the ability to perform field upgrades of the modem’s feature set quickly and easily from the front panel. Purchased upgrades will become part of the modems permanent configuration. Demonstration upgrades will enable the optional features for a 30-day evaluation period. B.
Appendix B 2. DMD20/DMD20 LBST Universal Satellite Modem Contact Radyne with the Unit ID and Desired Upgrades. The modem’s Unit ID can be found on the front panel as follows: a. b. c. d. e. f. From the modem’s Main Menu, scroll right to the SYSTEM Menu. Scroll down. Scroll right to the HW/FW CONFIG Menu. Scroll down. Scroll right to the FEATURES Menu. Scroll down The value displayed on the top line of this menu is the 12-digit Unit ID.
DMD20/DMD20 LBST Universal Satellite Modem Appendix B B.3 Demonstration Procedure The procedure for enabling a 30-day demo of the options is similar to the procedure used for permanently updating the modems feature set. The one big difference being that at the end of 30 days, the demo features will automatically be disabled and the modem will revert back to its permanent configuration.
Appendix B 2. DMD20/DMD20 LBST Universal Satellite Modem Contact Radyne with the Unit ID and Request a Demonstration. The modem’s Unit ID can be found on the front panel as follows: a. b. c. d. e. f. From the modem’s Main Menu, scroll right to the SYSTEM Menu. Scroll down. Scroll right to the HW/FW CONFIG Menu. Scroll down. Scroll right to the FEATURES Menu. Scroll down. The value displayed on the top line of this menu is the 12-digit Unit ID.
DMD20/DMD20 LBST Universal Satellite Modem Appendix B B.3.1 Running in Demonstration Mode Because of the possible interruption in traffic when the demonstration mode expires, several indicators are used to inform an operator that the modem is indeed, operating in demonstration mode. The most obvious of these is that the remote LED is flashing. A second indication can be found on the Features Menu as follows: 1. 2. 3. 4. 5. From the modem’s Main Menu, scroll right to the SYSTEM Menu. Scroll down.
Appendix B DMD20/DMD20 LBST Universal Satellite Modem B.3.2 Canceling Demonstration Mode At any time, a demonstration may be canceled and have the modem return to its normal operation. Once the demonstration has been canceled, it cannot be restarted using the old demonstration code. In order to restart a demonstration, it will be necessary to obtain a new demonstration code. To cancel a demonstration from the front panel, perform the following: 1. 2. 3. 4. 5. 6.
DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Carrier Control Appendix C C C.0 States The transmitter will turn off the carrier output automatically when the modem determines there is a major alarm. This is done to prevent the carrier from outputting an unknown spectrum and possibly disturbing adjacent carriers. This automatic drop of the carrier can be overridden by masking the alarm that is causing the fault. This will keep the modulator output spectrum transmitting, even when the fault occurs.
Appendix C DMD20/DMD20 LBST Universal Satellite Modem C.5 Carrier RTS Modulator output is turned off before reprogramming modulator functions that may alter the output spectrum through the front panel, and the user is required to enter “Yes” to re-enable output after the change.
DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Appendix D D Strap Codes D.0 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.
Appendix D 34 DMD20/DMD20 LBST Universal Satellite Modem 64 1 1/2 VIT NONE V.35 (IESS) Dis Dis QPSK CNT V.35 (IESS) Dis Dis QPSK CNT 36 64 1 3/4 VIT NONE 40 128 1 1/2 VIT NONE V.35 (IESS) Dis Dis QPSK CNT 48 128 1 3/4 VIT NONE V.35 (IESS) Dis Dis QPSK CNT V.35 (IESS) Dis Dis QPSK CNT 65 256 1 1/2 VIT NONE 66 256 1 3/4 VIT NONE V.35 (IESS) Dis Dis QPSK CNT 68 320 1 1/2 VIT NONE V.35 (IESS) Dis Dis QPSK CNT VIT NONE V.
DMD20/DMD20 LBST Universal Satellite Modem Appendix D 88 512 16/15 3/4 VIT IBS IBS Dis Dis QPSK IBS 97 1024 1 1/2 VIT CNT V.35 (IESS) Dis Dis QPSK CNT 98 1024 1 3/4 VIT CNT V.
Appendix D DMD20/DMD20 LBST Universal Satellite Modem 58 1344 16/15 1/2 VIT IBS IBS Dis Dis QPSK CNT 67 1408 16/15 1/2 VIT IBS IBS Dis Dis QPSK CNT 71 1408 16/15 3/4 VIT IBS IBS Dis Dis QPSK CNT 75 1472 16/15 1/2 VIT IBS IBS Dis Dis QPSK CNT 77 1472 16/15 3/4 VIT IBS IBS Dis Dis QPSK CNT 78 1600 16/15 1/2 VIT IBS IBS Dis Dis QPSK CNT 83 1600 16/15 3/4 VIT IBS IBS Dis Dis QPSK CNT 85 1664 16/15 1/2 VIT IBS IBS Dis Dis QPS
DMD20/DMD20 LBST Universal Satellite Modem Appendix D IBS: 2.048 Mbps or below 1/2, 3/4, 7/8 Rate Closed Network: 8.448: 6.312: 2.048: 1.544: Any Rate 2.048 & lower: 96 Kb Framing or No Framing, 3/4, 7/8 Rate FEC 96 Kb Framing or No Framing, 1/2, 3/4, 7/8 Rate FEC 96 Kb Framing or 1/15 Framing or No Framing, 1/2, 3/4, 7/8 Rate FEC 96 Kb Framing or 1/15 Framing or No Framing, 1/2, 3/4, 7/8 Rate FEC 1/15 Framing or No Framing, 1/2, 3/4, 7/8 Rate FEC D.1.
Appendix D DMD20/DMD20 LBST Universal Satellite Modem 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 Case 2: IBS 1.
DMD20/DMD20 LBST Universal Satellite Modem Appendix D 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
Appendix D DMD20/DMD20 LBST Universal Satellite Modem 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 Case 4: Loop Timing Example Method 1 Under In
DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Appendix E E TCP/IP Ethernet Setup E.0 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.
Appendix E DMD20/DMD20 LBST Universal Satellite Modem d. IP TEST: The IP Test selection is similar in behavior to the Default selection. When enabled, the following preset parameters will be programmed and will not change until the selection is changed. To edit these parameters, change the boot mode to NON-VOL. IP MASK MODEM IP ADDR SERVER IP ADDR ROUTER IP ADDR 255.255.255.000 192.168.000.238 192.168.000.101 192.168.000.
DMD20/DMD20 LBST Universal Satellite Modem Appendix E 8. MODEM EADDR: This displays the Modem (Unit) Ethernet Address. The Modem Ethernet Address is configured at the factory. It is a unique Radyne equipment identifier Address. Example: 0010650903EB 9. ETHER RATE: This displays the current Ethernet port data rate. If multiple rates are available, then a selection can be made to specify the Ethernet port data rate (10BaseT). Example Ethernet port Data Rate: 10 MBPS/HD E.
Appendix E DMD20/DMD20 LBST Universal Satellite Modem The Computer TCP/IP must be properly configured in order to obtain connectivity. The following set-up procedure can be used as a guide to aide in this setup. The following instructions apply only to Windows 2000 or XP Classic. 1. Click on the Start Button. Select Settings and click on the Control Panel Icon. Double click the Network Connections Icon. 2. Select the Local Area Connection icon for the applicable Ethernet adapter.
DMD20/DMD20 LBST Universal Satellite Modem Appendix E Local Area Connection Properties Box 4. Select “Use the following IP Address”. Enter in the IP Address that is offset by 5 or so numbers from the equipment address (the computer and the equipment that it is connecting to can not have identical addresses) and Subnet Mask ( this is identical to the subnet mask programmed into the equipment) into the corresponding fields. Click the OK button to complete the PC Configuration.
Appendix E DMD20/DMD20 LBST Universal Satellite Modem E.3.3 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.
DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Web Browser Setup Guide F.0 Appendix F F Introduction The Web Browser allows for connection to Radyne products through the Ethernet port. The Web interface allows for complete control and monitoring of all equipment parameters and functions via a 10Base-T Ethernet connection. Utilization of the Web browser is dependent upon proper set-up of the TCP-IP menus. For TCP-IP setup guidelines refer to Appendix G in the manual.
Appendix F DMD20/DMD20 LBST Universal Satellite Modem The web user database consists of three users (USER 1, USER 2, USER 3), with initial default names of guest, oper, and admin. Access rights and authentication make it possible to restrict access to a specified set of web users. There are three levels of security privileges that can be assigned to any user. They are: • • • • GUEST: Users are able to navigate most of the site, and view modem parameter settings.
DMD20/DMD20 LBST Universal Satellite Modem Appendix F 2. USER 1: This will allow the operator to change the user name, assign the Access group, authorized password for “USER 1”. Upon entering the following fields will be displayed: a. ACCESS GROUP: This will allow the assignment of “No Group”, “ADMIN”, “OPER”, or GUEST to USER 1. b. AUTH PASSWORD: This will allow for the entry of the password for USER 1. c.
Appendix F F.2 DMD20/DMD20 LBST Universal Satellite Modem Modem Web Site Once it is determined that the modem is reachable, start the internet browser and type the modem IP address in the address field then press the Enter key. The equipment Introduction page will display general information, showing the equipment type, an overview of the equipment features and capabilities, and available hardware and software options.
DMD20/DMD20 LBST Universal Satellite Modem Appendix F Enter “admin” for the user name and “admin” for the password to gain access with full privileges to the other pages within the browser. Modem Login Window Upon completion of a successful login, the user will be able to access the other screens within the Web Browser. F.3 Web Page Appearance This page displays the Monitor and Control section of the Web Interface.
Appendix F DMD20/DMD20 LBST Universal Satellite Modem Below the menu gel tabs, the main menu section will reflect the current programmed control state. At the top of the page, breadcrumb location identifier reminds the user how the page is selected (Location Identifier). There is a simple navigation scheme that consists of gel tabs centralized on the main page. F-6 TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem AUPC Operation G.0 Appendix F G 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.
Appendix G DMD20/DMD20 LBST Universal Satellite Modem G.0.2 EF AUPC In EF AUPC mode, the Target Eb/No indicates the local unit wants the remote unit to maintain a power level sufficient to provide the local Eb/No value. EF AUPC can be set to operate on either or both directions of a link but always require a bidirectional channel. Enabling AUPC on one side of the link will activate AUPC on the distant end of the link.
DMD20/DMD20 LBST Universal Satellite Modem Appendix F The AUPC Menu Functions and their descriptions are shown on Table G-1 ands G-2. Table G-1.
Appendix G G-4 DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Drop and Insert (D&I) Appendix H H H.0 Drop and Insert (D&I) The Drop and Insert (D&I) function provides an interface between a full T1 or E1 Trunk whose framing is specified in CCITT G.704 and a fractional Nx64 Kbps Satellite Channel. The Drop and Insert functionality conforms to IBS, small IDR, and Radyne Proprietary Efficient D&I Framing Structures. For information pertaining to Radyne proprietary Efficient Drop and Insert function, refer to Appendix I.
Appendix H DMD20/DMD20 LBST Universal Satellite Modem Figure H-1. Looped Modems Figure H-2. Looped Modems with Separate D&I Trunks H-2 TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Appendix H H.0.1 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 (refer to Figure H-3). Figure H-3. Drop Only H.0.2 Insert Only When Insert is enabled and Drop is disabled, the unit performs an insert-only function.
Appendix H DMD20/DMD20 LBST Universal Satellite Modem Figure H-5. Insert Only with Internal Frame Source H-4 TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Appendix H H.0.3 Mode Selection D&I can be easily configured to support several commonly used terrestrial data formats. For E1 Data, the user can choose between PCM-30, PCM-30C, PCM-31 and PCM-31C. For T1 Data, the user can choose between T1-D4, T1-ESF, and SLC-96. The following paragraphs provide more information on the various mode selection capabilities. H.0.3.
Appendix H DMD20/DMD20 LBST Universal Satellite Modem H.0.3.5 T1-D4/T1-D4-S The T1-D4 Mode of Operation supports a T1 Interface with 12 frames per multiframe. 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. Robbed Bit Signaling (RBS) is handled without any need for operator intervention and is transparent to the user. H.0.3.
DMD20/DMD20 LBST Universal Satellite Modem Appendix H H.0.5 Drop and Insert Mapping The following displays under Interface D&I Setup (both Tx and Rx), are editing displays only: 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. Figure H-6. Multidestinational Communications TM103 – Rev. 2.
Appendix H DMD20/DMD20 LBST Universal Satellite Modem Example : For a modem w/ Drop & 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.
DMD20/DMD20 LBST Universal Satellite Modem Appendix H 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 . The modem has now copied the current Tx Settings to the Tx Channel/Timeslot Display. 4.
Appendix H DMD20/DMD20 LBST Universal Satellite Modem Mode such as T1-D4 with the demod data rate set to 1920000 bps will result in the error message INVALID INSERT MODE and the selection will not be allowed. • Once D&I Mode has been selected, trying to change the data rate to something other than another valid D&I data rate will result in the error message ‘RATE OUT OF BOUNDS’ and the change will not be allowed.
DMD20/DMD20 LBST Universal Satellite Modem Appendix H The selection of PCM-30 or PCM-30C type terrestrial framing limits the terrestrial timeslots to values from 1 - 15, 17 - 31. In these modes, terrestrial timeslot 16 is reserved for ABCD signaling and may not be dropped or inserted. The selection of PCM-31 or PCM-31C type terrestrial framing limits the terrestrial timeslots to values from 1 - 31.
Appendix H DMD20/DMD20 LBST Universal Satellite Modem Under Modulator: Under Mod Data: Set Data Rate = 512000 Set Conv Enc = 3/4 Rate VIT Under Modulator: Set Network Spec.
DMD20/DMD20 LBST Universal Satellite Modem Appendix H 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 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 D
Appendix H DMD20/DMD20 LBST Universal Satellite Modem Figure H-8. Single Trunk Figure H-9. Rx Only With Trunk Figure H-10. Rx Only No Trunk H-14 TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Appendix H H.2 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 4-5). 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 M&C link. These maps are tables that are used to define and configure the D&I functions.
Appendix H DMD20/DMD20 LBST Universal Satellite Modem ROM maps are read-only and may not be modified (refer to Table H-2). ROM Map Table H-2.
DMD20/DMD20 LBST Universal Satellite Modem Appendix H The following paragraphs give examples of typical configurations that could use the ROM Maps as templates. The ROM Map used would have to be first copied to the appropriate Active Transmit (Drop) and/or Active Receive (Insert) Map(s) before it could be used. To use a modification of a ROM Map, the ROM Map must first be copied to the appropriate Edit Map, then modified, and then copied to the appropriate Active Map.
Appendix H DMD20/DMD20 LBST Universal Satellite Modem ROM Map 6 could be used as the template for an Active Transmit (Drop) and/or Active Receive (Insert) Map with a modulator and/or demodulator configured for 768 Kbps operation. The T1 or E1 Data in the transmit path or the demodulated data in the receive path would be dropped from and or inserted into the first 12 time slots of the T1 or E1 frame.
DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Appendix I I Efficient Drop & Insert I.0 Introduction The following paragraphs describe the menu structure and procedure for configuring a modem for Efficient Drop & Insert Mode. I.1 Prerequisite In order for a modem to be configured for Efficient Drop & Insert, the modem must have a G.703 Interface card installed and Drop & Insert option must be enabled.
Appendix I I.2 DMD20/DMD20 LBST Universal Satellite Modem Efficient Drop & Insert Mode With Efficient Drop & 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 Drop & Insert Open Network standard.
DMD20/DMD20 LBST Universal Satellite Modem I.2.1 Appendix I Calculating the Required Satellite Bandwidth In order to calculate the satellite bandwidth (i.e. the symbol rate), we must first calculate the Efficient D&I Rate (i.e. the data rate plus the overhead required for Efficient Drop & Insert). From there, the calculation of the required satellite bandwidth is identical to all other modes of operation and simply takes into account modulation type and forward error correction.
Appendix I DMD20/DMD20 LBST Universal Satellite Modem Summary and Examples: The following examples further illustrate how to calculate the Efficient D&I rate which can be summarized for N timeslots as: Efficient D&I Rate = Data Rate + (N * 250 bps) With E1 signaling add N * 2000 bps With Enhanced Async add (Truncation (In-Band Baud / (N * 125))) * (N * 125) bps Example 1a: 5 Drop Slots with T1-D4 framing, standard ES to ES overhead For 5 Drop Slots, the Data Rate would be 5 * 64000 or 320000 bps The Ef
DMD20/DMD20 LBST Universal Satellite Modem Appendix I Example 2b: Change to E1-PCM30 framing (E1 Signaling), standard ES to ES overhead Add 10 * 2000 bps to our previous calculation gives 662500 bps Still saving over 20,000 bps compared to the Drop & Insert open network standard. Example 2c: Change to Enhanced Async with In-Band Baud Rate of 1200 X = Truncation of (1200 / (10 * 125) X = Truncation of (0.
Appendix I I-6 DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Appendix J Ethernet Data Interface Setup J J.0 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 (refer to Section 4.8.1 for details).
Appendix J DMD20/DMD20 LBST Universal Satellite Modem J.0.1.2 Full-Duplex Flow Control In full-duplex mode, the interface implements IEEE 8802.3x flow control as follows: When available buffer space is almost gone, the unit sends out a pause frame with the maximum pause time to stop the remote nodes from transmitting. The interface sends out another pause frame with the pause time set to zero as soon as free buffer space becomes available. J.0.
DMD20/DMD20 LBST Universal Satellite Modem Appendix J J.0.5 Setting Up The DMD20/DMD20 LBST 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.
Appendix J DMD20/DMD20 LBST Universal Satellite Modem Link Status: The following status is available under the Monitor Menu/Link Status Sub-Menu when the Ethernet Data Interface is selected: Port 1 Status: Displays the current status of LAN Port 1. Port 2 Status: Displays the current status of LAN Port 2. Port 3 Status: Displays the current status of LAN Port 3. WAN Status: Displays the current status of the WAN Port.
DMD20/DMD20 LBST Universal Satellite Modem TM103 – Rev. 2.
DMD20/DMD20 LBST Universal Satellite Modem Appendix K K Glossary A A Ampere AC Alternating Current ADC Analog to Digital Converter AGC Automatic Gain Control AIS Alarm Indication System. A signal comprised of all binary 1s.
Appendix K DMD20/DMD20 LBST Universal Satellite Modem C C Celsius CATS Computer Aided Test Software CA/xxxx Cable Assembly CD-ROM Compact Disk – Read Only Memory CLK Clock cm Centimeter COM Common CPU Central Processing Unit CRC Cyclic Redundancy Check. A system of error checking performed at the transmitting and receiving stations.
DMD20/DMD20 LBST Universal Satellite Modem Appendix K F F Fahrenheit FAS Frame Acquisition Sync. A repeating series bits, which allow acquisition of a frame.
Appendix K DMD20/DMD20 LBST Universal Satellite Modem K Kbps Kilobits per Second Kbps Kilobytes per Second kg Kilogram kHz Kilohertz Ksps Kilosymbols per Second L LCD Liquid Crystal Display LED Light Emitting Diode LO Local Oscillator M mA Milliampere Mbps Megabits per Second MFAS Multi-Frame Acquisition Sync. See FAS.
DMD20/DMD20 LBST Universal Satellite Modem Appendix K Q QAM Quadrature Amplitude Modulation QPSK Quadrature Phase Shift Keying R RAM Random Access Memory RF Radio Frequency ROM Read Only Memory rms Root Mean Square RU Rack Unit. 1 RU = 1.75”/4.45 cm Rx Receive (Receiver) RxD Receive Data R-S Reed-Solomon Coding. Reed-Solomon codes are block-based error correcting codes with a wide range of applications in digital communications and storage. S SCC Satellite Control Channel.
Appendix K DMD20/DMD20 LBST Universal Satellite Modem WXYZ W Watt Misc. µs Microsecond 16QAM 16 Quadrature Amplitude Modulation 8PSK 8 Phase Shift Keying K-6 TM103 – Rev. 2.
