Page 1 AS9100 Rev B / ISO9001:2000 Registered Company DMD20/DMD20LBST Universal Satellite Modem Installation and Operation Manual IMPORTANT NOTE: The information contained in this document supersedes all previously published information regarding this product. This manual is subject to change without prior notice. Part Number MN-DMD20-20LBST Revision 14...
Page 3 Errata A for MN-DMD20-20LBST Rev 14 Comtech EF Data Documentation Update Chapter 7, Technical Specifications Subject: Errata Part Number: ER-DMD20LBS-EA14 (Errata documents are not subject to revision.) PLM CO Number: C-0026230 See attached page(s). The new information will be included in the next released Comments: revision of the manual.
Page 4 Blank Page ER-DMD20LBS-EA14 Rev - PLM C-0026230...
Page 5: Specifications
{2/3, 3/4, 5/6, 7/8, 8/9} Turbo Product Code (Optional) – (SuperCard ONLY) Turbo (BPSK) {21/44,5/16} Turbo (OQPSK/QPSK) {1/2, 3/4, 7/8} Turbo (8PSK) {3/4, 7/8} Turbo (16QAM) {3/4, 7/8} Legacy Turbo Rates {0.495, 0.793} < 5Mbps MN-DMD20-20LBST Revision 14 7–1 ER-DMD20LBS-EA14 Rev -...
Page 6 DMD20/20LBST Universal Satellite Modem Technical Specifications LDPC/TPC (Optional) LDPC (BPSK) {1/2} LDPC (OQPSK/QPSK) {1/2, 2/3, 3/4} LDPC (8PSK/8QAM) {2/3, 3/4} LDPC (16QAM) {3/4} Turbo (BPSK) {21/44} Turbo (QPSK/OQPSK) {1/2, 2/3, 3/4, 7/8} Turbo (8QAM/8PSK) {2/3, 3/4, 7/8} Turbo (16QAM) {3/4, 7/8}...
Page 7 Closed Network, Satellite Overhead 0.4% Time Slots 1-31 Any combination Terrestrial Interfaces A variety of standard interfaces are available for the DMD20/DMD20 LBST modem in stand-alone applications. IDR/ESC Interface (Optional) G.703 T1 (DSX1) 1.544 Mbps, 100-Ohm Balanced, AMI and B8ZS G.703 E1...
Page 8 DMD20/20LBST Universal Satellite Modem Technical Specifications 7.10 High-Speed Serial Interface (HSSI) HSSI: HSSI, Serial, 50-Pin SCSI-2 Type Connector (Female) 7.11 ASI ASI/RS-422 Parallel: ASI, Serial, 75-Ohm BNC (Female) DVB/M2P, Parallel, RS-422, DB-25 (Female) ASI/LVDS Parallel: ASI, Serial, 75-Ohm BNC (Female) DVB/M2P, Parallel, LVDS, DB-25 (Female) 7.12 DVB/M2P...
Page 9 19” W x 19.25” D x 1.75” H (48.26 x 40.64 x 4.45 cm) (48.26 x 48.89 x 4.45 cm) Weight 6.5 Pounds (3.0 Kg) 8.5 pounds (3.83 kg) 7.19 DMD20/DMD20 LBST Data Rate Limits 7.19.1 Non-DVB Modulation Code Rate Min Data Rate...
Page 10 DMD20/20LBST Universal Satellite Modem Technical Specifications Modulation Code Rate Min Data Rate Max Data Rate Option Card QPSK SEQ 7/8 8400 2048000 QPSK TPC 1/2 4582 9545454 Supercard QPSK TPC 3/4 7200 15000000 Supercard QPSK TPC 7/8 8400 17500000 Supercard QPSK TPC .495...
Page 11 DMD20/20LBST Universal Satellite Modem Technical Specifications Modulation Code Rate Min Data Rate Max Data Rate Option Card 8PSK/8QAM LDPC 3/4 40500 20000000 LDPC/TPC Card 8PSK TPC 3/4 40000 20000000 LDPC/TPC Card 8PSK TPC 7/8 48000 20000000 LDPC/TPC Card 16QAM VIT 3/4...
Page 12 DMD20/20LBST 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...
Page 13 Rate Specification 3/4 1E-7 Rate Specification 7/8 1E-8 Rate 1E-9 Eb/No in dB Figure 7-1 DMD20/20LBST B/O/QPSK BER Performance (Viterbi) Note: Eb/No values include the effect of using Differential Decoding and V.35 descrambling. MN-DMD20-20LBST Revision 14 7–9 ER-DMD20LBS-EA14 Rev -...
Page 14 1/2 Rate 1E-7 Specification 3/4 Rate 1E-8 Specification 7/8 Rate 1E-9 Eb/No in dB Figure 7-2 DMD20/20LBST B/O/QPSK BER Performance (Sequential) Note: Eb/No values include the effect of using Differential Decoding and V.35 descrambling. MN-DMD20-20LBST Revision 14 7–10 ER-DMD20LBS-EA14 Rev -...
Page 15 Specification 1/2 Rate 1E-7 Specification 7/8 Rate Specification 3/4 Rate 1E-8 1E-9 Eb/No in dB Figure 7-3 DMD20/20LBST B/O/QPSK BER Performance (Viterbi w/R-S) Note: Eb/No values include the effect of using Differential Decoding. MN-DMD20-20LBST Revision 14 7–11 ER-DMD20LBS-EA14 Rev -...
Page 16 BER Performance (Turbo) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Turbo Decoder Typical Performance 1E-3 1E-4 1E-5 1E-6 1E-7 Specification Turbo 0.495 1E-8 Specification Turbo 0.793 1E-9 Eb/No in dB Figure 7-4 DMD20/20LBST B/O/QPSK BER Performance (Turbo) MN-DMD20-20LBST Revision 14 7–12 ER-DMD20LBS-EA14 Rev -...
Page 17 1E-6 Specification 2/3 Rate 1E-7 Specification 2/3 Rate w/RS 1E-8 1E-9 Eb/No in dB Figure 7-5 DMD20/20LBST 8PSK BER Performance (Trellis) Note: Eb/No values include the effect of using interleaving and maximum iterations. MN-DMD20-20LBST Revision 14 7–13 ER-DMD20LBS-EA14 Rev -...
Page 18 Performance 1E-3 1E-4 1E-5 1E-6 1E-7 1E-8 Specification Turbo 0.793 1E-9 Eb/No in dB Figure 7-6 DMD20/20LBST 8PSK BER Performance (Turbo) Note: Eb/No values include the effect of using interleaving and maximum iterations MN-DMD20-20LBST Revision 14 7–14 ER-DMD20LBS-EA14 Rev -...
Page 19 1E-6 Specification 3/4 Rate 1E-7 Specification 7/8 Rate 1E-8 1E-9 Eb/No in dB Figure 7-7 DMD20/20LBST 16QAM BER Performance (Viterbi) Note: Eb/No values include the effect of using Differential Decoding and V.35 Descrambling. MN-DMD20-20LBST Revision 14 7–15 ER-DMD20LBS-EA14 Rev -...
Page 20 1E-6 Specification 1E-7 3/4 Rate w/RS Specification 7/8 Rate w/RS 1E-8 1E-9 Eb/No in dB Figure 7-8 DMD20/20LBST 16QAM BER Performance (Viterbi w/R-S) Note: Eb/No values include the effect of using Differential Decoding. MN-DMD20-20LBST Revision 14 7–16 ER-DMD20LBS-EA14 Rev -...
Page 21 1E-3 1E-4 1E-5 1E-6 Turbo 0.495 1E-7 Turbo 0.793 1E-8 1E-9 Eb/No in dB Figure 7-9 DMD20/20LBST 16QAM BER Performance (Turbo) Note: Eb/No values include the effect of using interleaving and maximum iterations. MN-DMD20-20LBST Revision 14 7–17 ER-DMD20LBS-EA14 Rev -...
Page 22 B/O/QPSK Uncoded Theory 1E-2 Turbo Decoder Specification 3/4 Rate 1E-3 1E-4 Specification Specification 1/2 Rate 7/8 Rate 1E-5 1E-6 1E-7 Typical Performance 1E-8 1E-9 Eb/No in dB Figure 7-10 DMD20/20LBST O/QPSK BER Performance (Turbo) MN-DMD20-20LBST Revision 14 7–18 ER-DMD20LBS-EA14 Rev -...
Page 23 Turbo Decoder 1E-3 1E-4 Specification 21/44 Rate 1E-5 Specification 1E-6 5/16 Rate 1E-7 Typical Performance 1E-8 1E-9 Eb/No in dB Figure 7-11 DMD20/20LBST BPSK BER Performance (Turbo) Note: BPSK TPC 5/16 available with PL/5051 Turbo Codec Hardware. MN-DMD20-20LBST Revision 14 7–19...
Page 24 BER Performance (8PSK Turbo) 1E-1 8PSK Uncoded Theory 1E-2 Turbo Decoder Specification 3/4 Rate 1E-3 Specification 7/8 Rate 1E-4 Typical Performance 1E-5 1E-6 1E-7 1E-8 1E-9 Eb/No in dB Figure 7-12 DMD20/20LBST 8PSK BER Performance (Turbo) MN-DMD20-20LBST Revision 14 7–20 ER-DMD20LBS-EA14 Rev -...
Page 25 BER Performance (16QAM Turbo) 1E-1 16QAM Uncoded Theory Turbo Decoder 1E-2 Specification 3/4 Rate Specification 7/8 1E-3 Rate 1E-4 Typical Performance 1E-5 1E-6 1E-7 1E-8 1E-9 Eb/No in dB Figure 7-13 DMD20/20LBST 16QAM BER Performance (Turbo) MN-DMD20-20LBST Revision 14 7–21 ER-DMD20LBS-EA14 Rev -...
Page 26 B/O/QPSK Uncoded Theory 1E-2 LDPC Decoder 1E-3 Specification 1/2 Rate Specification 2/3 Rate 1E-4 Specification 3/4 Rate 1E-5 Typical Performance 1E-6 1E-7 1E-8 1E-9 Eb/No in dB Figure 7-14 – DMD20/20LBST B/O/QPSK BER Performance (LDPC) MN-DMD20-20LBST Revision 14 7–22 ER-DMD20LBS-EA14 Rev -...
Page 27 Decoder 1E-3 1E-4 Typical Performance 8QAM Rate 2/3 Specification 1E-5 8PSK Rate 2/3 Specification 1E-6 8PSK/8QAM Rate 3/4 Specification 1E-7 1E-8 1E-9 Eb/No in dB Figure 7-15 – DMD20/20LBST 8PSK/8QAM BER Performance (LDPC) MN-DMD20-20LBST Revision 14 7–23 ER-DMD20LBS-EA14 Rev -...
Page 28 16QAM BER Performance (LDPC) 1E-1 16QAM Uncoded Theory 1E-2 LDPC Decoder 1E-3 1E-4 Typical Performance Specification 1E-5 3/4 Rate 1E-6 1E-7 1E-8 1E-9 Eb/No in dB Figure 7-16 – DMD20/20LBST 16QAM BER Performance (LDPC) MN-DMD20-20LBST Revision 14 7–24 ER-DMD20LBS-EA14 Rev -...
Page 29 DMD20/20LBST Universal Satellite Modem Technical Specifications 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 1E-3 4.2 dB 5.3 dB 6.2 dB 3.9 dB 4.9 dB 5.8 dB 1E-4 4.8 dB...
Page 30 DMD20/20LBST Universal Satellite Modem Technical Specifications Table 7-5 - 8PSK BER Performance (Trellis) Specification Typical 2/3 Rate 2/3 Rate w/RS 2/3 Rate 2/3 Rate w/RS 1E-3 6.3 dB 5.8 dB 4.8 dB 4.9 dB 1E-4 7.3 dB 6.1 dB 5.6 dB 5.1 dB...
Page 31 DMD20/20LBST Universal Satellite Modem Technical Specifications Table 7-9 - 16QAM BER Performance (Turbo) Specification Typical Turbo 0.495 Turbo 0.793 Turbo 0.495 Turbo 0.793 1E-3 5.6 dB 7 dB 1E-4 6.1 dB 7.4 dB 1E-5 6.6 dB 7.8 dB 1E-6 7 dB 8.2 dB...
Page 32 DMD20/20LBST Universal Satellite Modem Technical Specifications Table 7-13 - 16QAM BER Performance (Turbo) Specification Typical 3/4 Rate 7/8 Rate 3/4 Rate 7/8 Rate 1E-3 6.3 dB 7.8 dB 6 dB 7.4 dB 1E-4 6.7 dB 7.9 dB 6.4 dB 7.5 dB...
Page 33 DMD20/20LBST Universal Satellite Modem Technical Specifications 7.20.17 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 7-17 AGC Voltage Monitor MN-DMD20-20LBST Revision 14 7–29...
Page 34 DMD20/20LBST Universal Satellite Modem Technical Specifications BLANK PAGE MN-DMD20-20LBST Revision 14 7–30 ER-DMD20LBS-EA14 Rev -...
Page 35 Errata B for MN-DMD20-20LBST Rev 14 Comtech EF Data Documentation Update Chapter 3, Theory of Operation Subject: Errata Part Number: ER-DMD20LBS-EB14 (Errata documents are not subject to revision.) PLM CO Number: C-0028800 The new information will be included in the next released revision of the manual.
Page 36 Blank Page ER-DMD20LBS-EB14 Rev - PLM C-0028800...
Page 37: Installation And Operation Manual
DMD20/DMD20LBST Universal Satellite Modem Installation and Operation Manual Part Number MN-DMD20-20LBST Revision 14 Copyright © 2013 Comtech EF Data. All rights reserved. Printed in the USA. Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, 480.333.2200, FAX: 480.333.2161...
Page 38 BLANK PAGE...
Page 39: Table Of Contents
Table of Contents CHAPTER 1. INTRODUCTION .................. 1–1 Overview ..........................1–1 Configurations ........................1–2 1.2.1 Features/Options Installed at Time of Order..............1–2 1.2.2 Feature Upgrades ......................1–2 1.2.3 Hardware Options ......................1–2 1.2.4 Factory Installed Options ....................1–3 Function Accessibility ......................1–3 CHAPTER 2.
Page 40 Table of ContentsTable of Contents Revision 14 DMD20/DMD20LBST Universal Satellite Modem MN-DMD20-20LBST 3.3.4 Modem Monitor Status ..................... 3–7 Async Port / ES-ES Communications..................3–7 Internal Clock ........................3–7 Loopback Features (Terrestrial & IF) .................. 3–8 Clocking Options ......................... 3–11 3.7.1 TX Clock Options ......................
Page 41 Table of ContentsTable of Contents Revision 14 DMD20/DMD20LBST Universal Satellite Modem MN-DMD20-20LBST 3.15.4 System Functionality and Operational Considerations............. 3–29 3.15.5 DoubleTalk Carrier-in-Carrier Cancellation Process ............3–31 3.15.6 Margin Requirements ..................... 3–33 3.15.7 Carrier-in-Carrier Latency ....................3–33 3.15.8 Carrier-in-Carrier Link Design ..................3–33 3.15.8.1 Symmetric Data Rate Link ..................
Page 42 J18 ........................... 5–6 5.4.10 EIA-530 (J19) ........................5–7 5.4.11 REMOTE (J20) ........................ 5–8 5.4.12 ETHERNET (J21) ......................5–8 DMD20 LBST Chassis Connections (Standard) ..............5–9 5.5.1 EXT REF (J10) ........................ 5–9 5.5.2 TX (J11)........................... 5–9 5.5.3 RX (J14) .......................... 5–9 5.5.4...
Page 43 Table of ContentsTable of Contents Revision 14 DMD20/DMD20LBST Universal Satellite Modem MN-DMD20-20LBST 5.8.3 8K DATA (J3) ....................... 5–15 5.8.4 G.703 BAL (J4)......................5–16 5.8.5 SWITCH INTERFACE (J5) ................... 5–17 5.8.6 SD (DDI) (J6) ........................ 5–20 5.8.7 DDO (J7) ........................5–20 5.8.8...
Page 44 Data Rates ..........................7–1 Modulator ..........................7–1 Demodulator .......................... 7–2 Plesiochronous Buffer ......................7–3 Monitor and Control ......................7–3 DMD20/DMD20 LBST Drop and Insert (Optional) ............. 7–3 Terrestrial Interfaces ......................7–3 IDR/ESC Interface (Optional) ....................7–3 IBS/Synchronous Interface (Standard) ................. 7–3 7.10 High-Speed Serial Interface (HSSI) ..................
Page 45 Table of ContentsTable of Contents Revision 14 DMD20/DMD20LBST Universal Satellite Modem MN-DMD20-20LBST 7.19.2 DVB ..........................7–7 7.20 BER Specifications ......................... 7–9 7.20.1 BER Performance (Viterbi) ....................7–9 7.20.2 BER Performance (Sequential) ..................7–10 7.20.3 BER Performance (Viterbi with Reed-Solomon) ............. 7–11 7.20.4...
Page 46 Table of ContentsTable of Contents Revision 14 DMD20/DMD20LBST Universal Satellite Modem MN-DMD20-20LBST APPENDIX B. FRONT PANEL UPGRADE PROCEDURE ......... B–1 Introduction ...........................B–1 Required Equipment......................B–1 Upgrade Procedure ........................B–1 Demonstration Procedure ......................B–3 B.4.1 Running in Demonstration Mode ..................B–5 B.4.2 Canceling Demonstration Mode ..................B–6 APPENDIX C.
Page 47 Log in to the Equipment Website ..................F–7 Web Page Appearance ......................F–8 Configure Web Browsers for the Radyne WEB Interface ............ F–9 F.6.1 Configure Internet Explorer 9 for the Radyne WEB Interface ........... F–9 F.6.2 Configure Firefox for the Radyne WEB Interface ............. F–9 F.6.2.1 Change the encoding: ....................
Page 48 Table of ContentsTable of Contents Revision 14 DMD20/DMD20LBST Universal Satellite Modem MN-DMD20-20LBST H.1.2 Insert Only ........................H–3 H.1.3 Mode Selection ....................... H–4 H.1.3.1 PCM-30 ........................H–4 H.1.3.2 PCM-30C ........................H–4 H.1.3.3 PCM-31 ........................H–4 H.1.3.4 PCM-31C ........................H–4 H.1.3.5 T1-D4/T1-D4-S ......................H–5 H.1.3.6 T1-ESF/T1-ESF-S .......................
Page 49: About This Manual
PREFACE About this Manual This manual describes the installation and operation of the DMD20/DMD20LBST Universal Satellite Modem. Conventions and References Patents and Trademarks See all of Comtech EF Data's Patents and Patents Pending at http://patents.comtechefdata.com. Comtech EF Data acknowledges that all trademarks are the property of the trademark owners.
Page 50: Safety Compliance
DMD20/DMD20LBST Universal Satellite ModemPreface Revision 14 Preface MN-DMD20-20LBST Cautions and Warnings IMPORTANT or NOTE indicates a statement associated with the task being performed or information critical for proper equipment function. IMPORTANT CAUTION indicates a hazardous situation that, if not avoided, may result in minor or moderate injury.
Page 51: Limitations Of Warranty
DMD20/DMD20LBST Universal Satellite ModemPreface Revision 14 Preface MN-DMD20-20LBST Warranty Policy Comtech EF Data products are warranted against defects in material and workmanship for a period of two years from the date of shipment. During the warranty period, Comtech EF Data will, at its option, repair or replace products that prove to be defective.
Page 52: Customer Support
DMD20/DMD20LBST Universal Satellite ModemPreface Revision 14 Preface MN-DMD20-20LBST Customer Support Support Business Hours - Monday through Friday - 8:00 a.m. to 5:00 p.m. (MST) Comtech EF Data & Radyne • Satellite Modems • Modem Accessories Tel: +1.480.333.4357 • Amplifiers Fax: +1.480.333.2500 •...
Page 53: Chapter 1. Introduction
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”.
Page 54: Configurations
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.
Page 55: Factory Installed Options
DMD20/20LBST Universal Satellite Modem Introduction Only authorized service personnel should handle and install optional hardware options. IMPORTANT 1.2.4 Factory Installed Options Units may also be sent to the factory for hardware option installation. Please contact the Customer Service Department for information not limited to availability and to shipping costs.
Page 56 DMD20/20LBST Universal Satellite Modem Introduction BLANK PAGE MN-DMD20-20LBST Revision 14 1–4...
Page 57: Chapter 2. Installation
Refer to the sections that follow for further installation instructions. The Universal Satellite Modem was carefully packaged to avoid damage and should arrive complete with the following items for proper installation: DMD20/DMD0=20LBST Universal Satellite Modem Power Cord, six foot with applicable AC Connector Installation and Operation Manual...
Page 58: Installation Requirements
DMD20/20LBST Universal Satellite Modem Installation Installation Requirements The modem is shipped fully assembled. It does not require removal of the covers for any purpose in installation. The power supply itself is designed for universal application using from 100 to 240 VAC, 50 to 60 Hz, 1.0A.
Page 59: Removal And Assembly
DMD20/20LBST Universal Satellite Modem Installation Removal and Assembly The Modem is shipped fully assembled. It does not require removal of the covers for any purpose in installation. Always ensure that power is removed from the before removing or installing any optional modules. Failure to do so may cause damage to the equipment.
Page 60: Initial Configuration Check
DMD20/20LBST Universal Satellite Modem Installation connection at all times. Therefore, it is imperative during installation, configuration, and operation that the user ensures that the unit has been properly grounded using the ground stud provided on the rear panel of the unit.
Page 61 DMD20/20LBST Universal Satellite Modem Installation Standard Factory Configuration Settings Modulator: Data Rate: 2.048 Mbps Mode: Closed Network Satellite Framing: None Scrambler: V.35 (IESS) Drop and Insert: Disabled Inner FEC: 1/2 Rate Viterbi Outer FEC: Disabled Modulation: QPSK Frequency: 70.000000 MHz...
Page 62: Modulator Checkout
DMD20/20LBST Universal Satellite Modem Installation Modulator Checkout The following descriptions assume that the unit is installed in a suitable location with prime AC power and supporting equipment available. 2.6.1 Initial Power-Up Before initial power up of the unit, it is a good idea to disconnect the transmit output from the operating ground station equipment.
Page 63: Chapter 3. Theory Of Operation
Turbo Codec printed circuit card and one of several types of Interface printed circuit card (refer to Appendix A). A block diagram of the Modem is shown in Figure 3-1. Figure 3-1 Block Diagram MN-DMD20-20LBST Revision 14 3–1...
Page 64: L-Band/If Printed Circuit Card
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.1.1 L-Band/IF Printed Circuit Card The L-Band/IF Printed Circuit Card consists of an analog modulation function, an analog complex down conversion, and two wide-band digital synthesizers. The block diagram of the L-Band/IF Assembly is shown in Figure 3-2.
Page 65: Baseband Processing Printed Circuit Card
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.1.2 Baseband Processing Printed Circuit Card The advent of million-plus gate count FPGAs, advanced logic synthesis tools, and DSPs providing hundreds of MIPs enabled the design of a software configurable modem. Large, fast FPGAs now provide designers with what is essentially an on the fly programmable ASIC.
Page 66: Front Panel
DMD20/20LBST Universal Satellite Modem Theory of Operation Figure 3-3 Universal Satellite Modem Functional Block Diagram 3.2.1 Front Panel The Front Panel includes a 2 x 16 backlit LCD Display, Indicator LEDs, and a Numeric Keypad (refer to Chapter 4). 3.2.2 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.
Page 67: Tx Baseband Processing
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.2.3 Tx Baseband Processing The Tx Data and Clock enters the Baseband Processor, passes through a Rate Adapting FIFO and enters the Framer/Drop Processor. In IDR, IBS, and D&I Modes, the framer adds the appropriate framing and ESC as defined in IESS-308 and 309.
Page 68: Terminal Port
Control and status messages are conveyed between the modem and all subsidiary modems and the host computer using packetized message blocks in accordance with a proprietary communications specification. This communication is handled by the Radyne Link Level Protocol (RLLP), which serves as a protocol ‘wrapper’ for the RM&C data. Complete information on monitor and control software is contained in the following sections.
Page 69: Modem Monitor Status
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.3.4 Modem Monitor Status The modems M&C system is connected to most of the circuitry on any board contained in the chassis. These connections provide status on the working condition of the circuitry as well as providing the data required for the various measurements the modem provides.
Page 70: Loopback Features (Terrestrial & If)
DMD20/20LBST Universal Satellite Modem Theory of Operation 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 ...
Page 71 DMD20/20LBST Universal Satellite Modem Theory of Operation Figure 3-4 Loopback Functional Block Diagram MN-DMD20-20LBST Revision 14 3–9...
Page 72 DMD20/20LBST Universal Satellite Modem Theory of Operation Figure 3-5 Loopback Functional Block Diagram Figure 3-6 Loopback Functional Block Diagram MN-DMD20-20LBST Revision 14 3–10...
Page 73: Clocking Options
DMD20/20LBST Universal Satellite Modem Theory of Operation 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.
Page 74: Scte: Serial Clock Transmit External
DMD20/20LBST Universal Satellite Modem Theory of Operation 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  3.7.1.1 SCTE: Serial Clock Transmit External The SCTE clock is the Transmit Terrestrial Clock associated with the data interface.
Page 75: Rx Sat Clock
DMD20/20LBST 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.
Page 76: Ext Ref: External Reference, Top Bnc Port, J10
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.7.3 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.
Page 77: Reed-Solomon Codec
DMD20/20LBST Universal Satellite Modem Theory of Operation The DMD20 & 20LBST supports Radyne HDLC and Comtech HDLC modes, offering compatibility with the SLM5650A Bridge Interface. IMPORTANT Reed-Solomon Codec Refer to Figure 3-8, Figure 3-9, and Table 3-1. IMPORTANT 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.
Page 78: Interleaving
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.9.3 Interleaving Interleaving depths of 4, 8, or 12 R-S blocks are allowed. This allows burst errors to be spread over multiple blocks in order to enhance the error correcting performance of the R-S Codec. For Intelsat Network Modes, the interleaving depth is automatically set to 4 for QPSK or BPSK, or 8 for 8PSK.
Page 79: Asynchronous Overhead Operation (Framing/Multiplexer Capability)
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.10 Asynchronous Overhead Operation (Framing/Multiplexer Capability) The Asynchronous Framing/Multiplexer is capable of multiplexing a relatively low-speed overhead channel onto the terrestrial data stream resulting in a slightly higher combined or aggregate data rate through the modem. The overhead channel is recovered at the far end. This added channel is termed variously “An Overhead Channel”, ”Service Channel”, “Async Channel”...
Page 80: Standard Ibs Mode
DMD20/20LBST Universal Satellite Modem Theory of Operation Table 3-2 Kbps Baud Rate Example for Kbps Baud Rate Example for Standard IBS Enhanced Mode 1216 19200 1280 19200 1344 19200 1408 19200 1472 19200 1536 19200 1600 19200 1664 19200 1728...
Page 81: Asynchronous Multiplexer Mode
3.14 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. MN-DMD20-20LBST Revision 14...
Page 82: Scc Framing Structure
DMD20/20LBST Universal Satellite Modem Theory of Operation In Pass Thru Mode, there is no formatting or deformatting of the input data in the buffer, and it is transmitted on a first-in first-out basis. In band data entering the remote port is inserted into the user data stream.
Page 83: Aggregate Data Rate
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.14.2 Aggregate Data Rate The aggregate data rate equals: User Data Rate + In-Band Rate + Synchronizing Overhead Rate Because SCC adjusts the overhead so that there are an equal number of user data bits in each slot, the synchronizing overhead cannot be easily calculated.
Page 84: Actual Overhead Rate Calculation
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.14.4 Actual Overhead Rate Calculation The following is the actual calculation the modem does to calculate the overhead ratio: The modem calculates the minimum in-band rate to limit the size of the user data slots to 2,500 bits (the result is truncated to an integer).
Page 85: Scc Overhead Channel Setup
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.14.5 SCC Overhead Channel Setup 1. Set the Framing Mode (located under Mod and Demod Data Menus) to SCC. After doing this, two new menus will appear to the right of the Framing Menu, for both the Mod and Demod.
Page 86 DMD20/20LBST Universal Satellite Modem Theory of Operation SCC Overhead Chart Examples (Viterbi 3/4 w/V.35 Scrambler) Modem Data Rate SCC Control In-Band Overhead Symbol Rate Kbps Channel Rate Rate Setting 6800 6700 6667 6650 6641 6634 6629 9600 19200 9600 17067...
Page 87: Doubletalk Carrier-In-Carrier Option
CnC was first introduced in Comtech EF Data products in the CDM-Qx Satellite Modem and, more recently, in the CLO-10 Link Optimizer. The implementation of DoubleTalk Carrier-in-Carrier in the Radyne DMD20 has been further refined, and some of the limitations that existed in the CDM-Qx implementation have been overcome.
Page 88 Link must be full duplex. • A Radyne DMD20 must be used at the end of the link where the cancellation needs to take place. The transponder is operated as Loopback. That is, each end of the link must be able to •...
Page 89 DMD20/20LBST Universal Satellite Modem Theory of Operation 4) Link Asymmetries: Various asymmetries in the forward and return link can produce differences in the relative power of the two received signal components. These can be both deterministic (static) or random (and time varying). An example of the former would be the differences resulting from antenna size/gain variations between the two ends of the link.
Page 90: Operational Recommendations
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.15.3 Operational Recommendations The rules for CnC operation are summarized below: • Both earth stations share the same footprint so each sees both carriers; • CnC carriers are operated in pairs; • One outbound with multiple return carriers is not allowed;...
Page 91: System Functionality And Operational Considerations
The transponder downlinks the composite signal containing both carriers on the same band to the Radyne DMD20 which then translates the signal to near baseband where it can be filtered (decimated) and then processed as a complex envelope signal. The Radyne DMD20 then suppresses the version of the near end carrier on the downlink side and then passes the desired carrier to the demodulator for normal processing.
Page 92 DMD20/20LBST Universal Satellite Modem Theory of Operation CDM - 625 with CnC DMD20 with CnC DMD20 with CnC Figure 3-12. Same Link Using Radyne DMD20 and DoubleTalk Carrier-in-Carrier Traditional Full Duplex Link Duplex Link with DoubleTalk Carrier-in- Carrier Figure 3-13. Duplex Link Optimization...
Page 93: Doubletalk Carrier-In-Carrier Cancellation Process
DMD20/20LBST Universal Satellite Modem Theory of Operation One possible way to mitigate false peaks is to narrow the correlation window. For example, if the delay is known to be around 240ms, set the minimum search delay to 230ms and the maximum search delay to 250ms.
Page 94 DMD20/20LBST Universal Satellite Modem Theory of Operation Figure 3-14. DoubleTalk Carrier-in-Carrier Signals Referring to Figure 3-14: Modem 1 and Modem 2 transmit signals S1 and S2 respectively. The satellite receives, translates, and retransmits the composite signal. The downlink signals S1* and S2*, received at Modem 1 and Modem 2 differ from the transmit signals primarily in terms of phase, frequency, and delay offsets.
Page 95: Margin Requirements
BER. Margin requirements depend on the product, modulation and power ratios: For the Radyne DMD20, the additional margin requirements are as follows: * Equal power and equal symbol rate...
Page 96: Symmetric Data Rate Link
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.15.8.1 Symmetric Data Rate Link Consider the following example: Satellite & Transponder Galaxy 18 @ 123º W, 13K/13K Earth Station 1 Phoenix, AZ – 4.6 m Earth Station 2 Phoenix, AZ – 2.4 m...
Page 97 DMD20/20LBST Universal Satellite Modem Theory of Operation Link parameters and LST summary for QPSK, LDPC 2/3 with Carrier-in-Carrier is as follows: MN-DMD20-20LBST Revision 14 3–35...
Page 98 DMD20/20LBST Universal Satellite Modem Theory of Operation The link budget summary for the different MODCOD combinations is as follows: Allocated BW Leased BW Savings Compared PSD Ratio S. No. Modulation & FEC PEB (MHz) (MHz) (MHz) to Original (dB) 8-QAM, LDPC 2/3 0.3584...
Page 99: Asymmetric Data Rate Link
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.15.8.2 Asymmetric Data Rate Link As occupied (or allocated) bandwidth of a Carrier-in-Carrier circuit is dictated by the larger of the two carriers, it is strongly recommended that the smaller carrier be spread as much as possible using a lower order modulation and/or FEC, while meeting the PSD ratio spec.
Page 100: Power Limited Links
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.15.8.3 Power Limited Links Carrier-in-Carrier can provide substantial savings even when the original link is power limited. Spreading the carrier by using a lower modulation and/or FEC along with latest FEC such as VersaFEC can substantially reduce the total power which can then be traded with bandwidth using Carrier-in-Carrier.
Page 101: Carrier-In-Carrier Commissioning And Deployment
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.15.9 Carrier-in-Carrier Commissioning and Deployment Prior to commissioning a Carrier-in-Carrier link, it is critical that the link is fully tested in non Carrier-in-Carrier mode and all system issues including external interference, antenna pointing, cabling, SSPA backoff are resolved.
Page 102: Validating Carrier-In-Carrier Performance
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.15.10 Validating Carrier-in-Carrier Performance Carrier-in-Carrier performance can be easily validated by verifying that Eb/No degradation due to Carrier-in-Carrier is within published specification for the observed Power Spectral Density Ratio. The following procedure is recommended for validating Carrier-in-Carrier performance:...
Page 103: Operational References
Threshold Eb/No for the link budget Verify that the PDS ration is within spec for the Radyne DMD20. 3. Calculate the Allocated Bandwidth (BW) and Power Equivalent Bandwidth (PEB) for the duplex link: • BW = Greater of (BW...
Page 104: Estimating Psd Ratio
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.15.13 Estimating PSD Ratio PSD can be estimated from a link budget using Downlink EIRP and Symbol Rate: PSD = Downlink EIRP – 10 * Log (Symbol Rate) PSD Ratio Example: Carrier Downlink EIRP...
Page 105: Estimating Psd Ratio From Satmaster
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.15.13.2 Estimating PSD Ratio from Satmaster 3.15.13.3 Estimating PSD Ratio Using Spectrum Analyzer PSD Ratio or CnC Ratio can also be estimated using a Spectrum Analyzer capable of integrating the signal power in a given bandwidth.
Page 106: Glossary
DMD20/20LBST Universal Satellite Modem Theory of Operation 3.15.14 DoubleTalk Carrier-in-Carrier Specifications Requires the two links to share a common carrier frequency (Outbound and Inbound Operating Mode symbol rates do not have to be equal) BSPK/QPSK/8-PSK/8-QAM: –7 dB to +11 dB (ratio of power spectral density,...
Page 107 DMD20/20LBST Universal Satellite Modem Theory of Operation Power Equivalent Bandwidth Power Equivalent Bandwidth (PEB) is the transponder power used by a carrier, represented as bandwidth equivalent. PEB Calculation Example: • Transponder EIRP = 37 dBW • Output Backoff (OBO) = 4 dB •...
Page 108: Edmac Satellite Framing/Deframing Mode
Users are required to identify these ID codes when they want additional features added to their unit. Radyne will supply a new ID code that is required to be entered in the ID code field. Once the new ID code is entered, the modem will activate the new features.
Page 109: Chapter 4. User Interfaces
Terminal Interface - :Refer to section 4.5. Front Panel User Interface The Front Panel of the DMD20/DMD20 LBST allows for complete control and monitor of all DMD20/DMD20 LBST parameters and functions via a keypad, LCD display and status LEDs. The front panel layout is shown in Figure 4-1 and Figure 4-2 showing the location and labeling of the front panel.
Page 110 DMD20/20LBST Universal Satellite Modem User Interfaces Figure 4-1 DMD20 Front Panel Figure 4-2 DMD20 LBST Front Panel Table 4-1 Item Number Description Function LCD Front Panel Display Displays operating parameters and Configuration data Cursor Control Arrow Keys Controls the up, down, right and left motion...
Page 111: Lcd Front Panel Display
DMD20/20LBST Universal Satellite Modem User Interfaces 4.2.1 LCD Front Panel Display The front panel display is a 2 line by 16-character LCD display. The display is lighted and the brightness can be set to increase when the front panel is currently in use.The LCD display automatically dims after a period of inactivity.
Page 112: Front Panel Led Indicators
DMD20/20LBST Universal Satellite Modem User Interfaces 4.2.4 Front Panel LED Indicators Twelve LEDs on the Front Panel (Refer to Table 4-3) indicate the status of operation. The LED colors maintain a consistent meaning. Green signifies that the indication is appropriate for normal operation, Yellow means that there is a condition not proper for normal operation, and Red indicates a fault condition that will result in lost communications.
Page 113: Front Panel Control Screen Menus
DMD20/20LBST Universal Satellite Modem User Interfaces Figure 4-3 Entering New Parameters Following a valid input, the unit will place the new setting into the nonvolatile EEPROM making it available immediately and available the next time the unit is powered-up. Front Panel Control Screen Menus The Front Panel Control Screens are broken down into sections under several Main Menus.
Page 114: Modulator Menu Options And Parameters
DMD20/20LBST Universal Satellite Modem User Interfaces 4.4.2 Modulator Menu Options and Parameters NETWORK SPEC {IDR, IBS, DROP & INSERT, DVB SAT, CLOSED NET} 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.
Page 115 DMD20/20LBST Universal Satellite Modem User Interfaces DVB: Per EN301-421 & En301-210 Data Rates: All Rates Framing Type: Scrambler Type: Spectrum Mask: DVB 0.25, 0.35 Closed Net: All possible combinations allowed, however, a DVB setting requires the DVB network spec. .
Page 116 Allows the user to select the Tx Code Rate and Type TPC INTERLEAVER {DISABLE, ENABLE} Allows user to disable or enable the TPC Interleaver. Valid only for Radyne Legacy turbo codes TPC.495 and TPC.793 DIFF CODING {ENABLED, DISABLE} Allows the user to enable or disable the Differential Encoder.
Page 117 DMD20/20LBST Universal Satellite Modem User Interfaces 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. Only displayed when Efficient D&I with Enhanced Async are selected.
Page 118 DMD20/20LBST Universal Satellite Modem User Interfaces option if the BUC does not support FSK or if the customer does not want to utilize the FSK option. CODAN: Enables the FSK Communication link for CODAN BUCs only. This feature enables the DMD20LBST to retrieve and display certain BUC parameters on the front panel of the modem.
Page 119 DMD20/20LBST Universal Satellite Modem User Interfaces HI ALARM THRSH {0.00 Volts} Allows user to select high alarm limit/threshold for BUC voltage. LOW ALARM THRSH {0.00 Amps} Allows user to select lower alarm limit/threshold for BUC current. HI ALARM THRSH {0.00 Amps} Allows user to select high alarm limit/threshold for BUC current.
Page 120 'REMOTE CL ACTION' Menu or the 'LOCAL CL ACTION'. 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.
Page 121 DMD20/20LBST Universal Satellite Modem User Interfaces RADYNE: When configured for Radyne AUPC, the maximum Transmit Power is the highest power setting that will be used when the remote modem commands an increase of the Transmit Power from the Local modem...
Page 122 ‘NO DATA’ will be displayed. When modems are configured for Radyne AUPC, the remote Eb/No will be displayed in the Monitor Menus. IMPORTANT MN-DMD20-20LBST Revision 14...
Page 123: Demodulator Menu Options And Parameters
DMD20/20LBST Universal Satellite Modem User Interfaces 4.4.3 Demodulator Menu Options and Parameters NETWORK SPEC {IDR, IBS, DROP & INSERT, DVB SAT, LDPC, CLOSED NET} 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.
Page 124 DMD20/20LBST Universal Satellite Modem User Interfaces Closed Net: All possible combinations allowed, however, a DVB setting requires the DVB network spec. STRAP CODE {Refer to Strap Code Guide, Appendix H} The Strap Code is a quick set key that sets many modem parameters.
Page 125 DMD20/20LBST Universal Satellite Modem User Interfaces REACQ RANGE (Hz) {0 – 65535 Hz} Allows the user to set the reacquisition sweep in 1 Hz increments. ADJ CARRIER PWR {Normal, Suppressed} Allows the user to indicate adjacent carrier as Normal or Suppressed (High Power).
Page 126 *This is not a normal mode of operation for the modem. TPC INTERLEAVER {DISABLED, ENABLED} Allows the user to disable or enable TPC Interleaver. Valid only for Radyne Legacy turbo codes TPC.495 and TPC.793. DIFF CODING {ENABLED, DISABLE} Allows the user to enable or disable the Differential Decoder.
Page 127 DMD20/20LBST Universal Satellite Modem User Interfaces BPSK SYMB PAIR {NORMAL, SWAPPED} Allows the user to swap the I & Q Channels, when using BPSK Modulation. ESC OVERHEAD {VOICE X2, DATA 64KBPS} IDR ESC Channel used for Voice or 64 K data channel.
Page 128: Interface Menu Options And Parameters
DMD20/20LBST Universal Satellite Modem User Interfaces HI ALARM THRSH {0.00 Amps} Allows user to select high alarm limit/threshold for LNB current. These selections are visible only when the Carrier in Carrier card CNC (menu) is installed. ENABLE/DISABLE {ENABLED, DISABLED} Allows the user to Enable/Disable the Carrier in Carrier.
Page 129 CRC, when bypassed the modem will pass on the packet even with an incorrect CRC. ETH HDLC {RADYNE, COMTECH} Selects Radyne’s HDLC or Comtech’s HDLC. TX CLK SRC {SCTE, SCT, EXT CLK} Allows the user to select the Transmit Clock Source.
Page 130 DMD20/20LBST Universal Satellite Modem User Interfaces ESC CHAN#1 (dB) {-20 to +10 dB} Allows user to select ESC Voice Channel Gain. Only displayed when IDR NETWORK and VOICE Channel are selected. ESC CHAN#2 (dB) {-20 to +10 dB} Allows user to select ESC Voice Channel Gain. Only displayed when IDR NETWORK and VOICE Channel are selected.
Page 131 DMD20/20LBST Universal Satellite Modem User Interfaces TX ACT, RX ACT, TX EDIT, RX EDIT, USER 1 - USER 8, ROM 1 -ROM 8 SAT CH TERRCH {1-31 1-31} The up/down arrow keys allow you to traverse the sat terr pairings. The slot numbers may be edited using the keypad.
Page 132 IBS/MNR/MJR ALM: Only supports IBS prompt and service alarms, minor and major alarms. RTS Alarm: Allows contact closures to be activated when the carrier is configured for RTS signaling. Refer to Radyne App Note 230 for addition information on utilizing this feature as Keyline Operation.
Page 133: Monitor Menu Options And Parameters
AGC VOLATAGE (V) Radios. Displays the estimated E as seen by the demodulator. EBNO (dB) Remote EB/NO displayed when modem is configured for Radyne REMOTE EB/NO AUPC. Displays the estimated channel error rate (before decoding) RAW BER measured by the modem.
Page 134 DMD20/20LBST Universal Satellite Modem User Interfaces Displays the total number of Ethernet packets received from the TOTAL PACKETS satellite (Only visible when Ethernet is selected as the interface type). Displays the number of error Ethernet packets received from the ERROR PACKETS satellite (Only visible when Ethernet is selected as the interface type).
Page 135 DMD20/20LBST Universal Satellite Modem User Interfaces Displays the measured voltage of the +12 Volt power bus +12V SUPPLY located inside the modem. Displays the measured voltage of the +20 Volt power bus +20V SUPPLY located inside the modem. Displays the measured voltage of the -12 Volt power bus located -12V SUPPLY inside the modem.
Page 136: Alarms Menu Options And Parameters
DMD20/20LBST Universal Satellite Modem User Interfaces 4.4.6 Alarms Menu Options and Parameters Masking alarms may cause undesirable modem performance. CAUTION 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.
Page 137 DMD20/20LBST Universal Satellite Modem User Interfaces 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.
Page 138 DMD20/20LBST 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.
Page 139 DMD20/20LBST Universal Satellite Modem User Interfaces RX MINOR (menu) 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.
Page 140 DMD20/20LBST Universal Satellite Modem User Interfaces 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.
Page 141 DMD20/20LBST Universal Satellite Modem User Interfaces -12V SUPPLY {Pass/Fail, Unmasked/Masked} Displays the measured voltage of the -20 Volt power bus located inside the modem. LATCHED ALARMS {Pass/Fail} The following alarms are latched in order to catch intermittent failures: TX MAJOR (menu)
Page 142 DMD20/20LBST Universal Satellite Modem User Interfaces 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...
Page 143 DMD20/20LBST Universal Satellite Modem User Interfaces 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...
Page 144: System Menu Options And Parameters
DMD20/20LBST Universal Satellite Modem User Interfaces IDR1 SAT ALARM 3 {PASS, FAIL} IDR1 SAT ALARM 4 {PASS, FAIL} IBS SAT ALARM {PASS, FAIL} T1E1 SATTERR ALM {PASS, FAIL} SAT MAP SUMMARY {NONE, BK 1; BK 2; BK 1&2; BK 3; BK 1&3; BK 2&3; BK 1&2&3;...
Page 145 DMD20/20LBST Universal Satellite Modem User Interfaces FRONT PANEL (menu) BKLT LEVEL {OFF, LOW, MED, HIGH} Allows the user to enter the backlight intensity level. BKLT TIMEOUT {00 - 99} Allows the user to enter the length of time (in minutes ) of keyboard inactivity before the backlight shuts off.
Page 146 DMD20/20LBST Universal Satellite Modem User Interfaces TCP/IP (menu) BOOT MODE {DEFAULT, NON-VOL, BOOTP, IP TEST} DEFAULT: During initialization (boot up), the modem will restore the web setting to the standard IP Mask and addresses supplied by the modem. The modem will be taken off the network and will not be accessible.
Page 147 DMD20/20LBST Universal Satellite Modem User Interfaces SERVER IP ADDR {XXX.XXX.XXX.XXX} Hexidecimal Address {ddd.ddd.ddd.ddd} Decimal Address The IP Address of the Boot Server and the address of the SNMP Trap Server when SNMP is active. If a server is used and there is no local router, this address must be consistent with the modem address.
Page 148 DMD20/20LBST Universal Satellite Modem User Interfaces The dev context allows a user with appropriate authentication to access the device control portion of the MIB. These OIDs are used to control the devices satellite link and operation. TRAP VERSION {V1, V2} This controls the type of message format used when a message trap is generated by the equipment and bound for a SNMP Host.
Page 149 DMD20/20LBST Universal Satellite Modem User Interfaces CONFIRMATION {ENABLE, DISABLE} USER 1 ACCESS GROUP {NO GROUP, GUEST, OPER, ADMIN} Access rights represent the following: No Group: Denies Access Guest: Users are able to navigate most of the site, and view modem parameter settings.
Page 150 DMD20/20LBST Universal Satellite Modem User Interfaces front panel. The user can clear all characters from the front panel screen. Resets group and password. USER RESET USER 3 ACCESS GROUP {NO GROUP, GUEST, OPER, ADMIN} Access rights represent the following: No Group: Denies Access Guest: Users are able to navigate most of the site, and view modem parameter settings.
Page 151 HI STABILITY. Used for factory test only. LARGEST HB GAP SOFT RESET {Enter} Indicates the Radyne part number for the IF Board Assembly. IF BOARD (menu) AGC/CTRL/VALUE {0% - 100%} Allows the user to adjust the internal frequency reference for calibration.
Page 152 DMD20/20LBST Universal Satellite Modem User Interfaces CNC DEBUG REGS1 Used for factory test only. CNC DEBUG REGS2 Used for factory test only. CNC DEBUG REGS3 Used for factory test only. CNC DEBUG REGS4 Used for factory test only. Used for factory test only.
Page 153: Test Menu Options And Parameters
DMD20/20LBST Universal Satellite Modem User Interfaces D&I AUPC 8PSK 16QAM TURBO 52 MBPS OM73 SCRAMBLING EDMAC ETH WAN MONITOR 8QAM LDPC 20 MBPS 4.4.8 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.
Page 154 DMD20/20LBST Universal Satellite Modem User Interfaces IF: IF loopback loops the IF output of the Modulator to the IF input of the Demodulator. If using 8PSK or 16QAM Modulation, the output power must be above -15 dB. TERR TX/RX: Enables both. Baseband loopback is performed at interface between the Baseband Processor Card and the Modem Card.
Page 155: Terminal Mode Control
Connection to the terminal device. The RS-232 operating parameters can be set using the modem Front Panel and stored in EEPROM for future use (refer to Section 4.7 Terminal Screen Setup). Refer to the DMD20 Remote Protocol Manual (MN-DMDREMOTEOP) for the terminal screens. IMPORTANT 4.5.1 Modem Terminal Mode Control...
Page 156: Terminal Port User Interface
 Modify the selection, if necessary, to match the settings (the Front Panel ‘SYSTEM’ Sub- Menu contains all the Terminal Emulation Controls). Terminal Screens Refer to the DMD20 Remote Protocol Manual (MN-DMDREMOTEOP) for the terminal screens. IMPORTANT MN-DMD20-20LBST Revision 14...
Page 157: Chapter 5. Rear Panel Interfaces
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). The connector definitions below are those on the DMD20/DMD20 LBST unit. Any connection interfacing to the DMD20/DMD20 LBST must be the appropriate mating connector.
Page 158 DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces Figure 5-1 DMD20 Universal Satellite Modem Rear Panel Configuations MN-DMD20-20LBST Revision 14 5–2...
Page 159 DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces Figure 5-2 DMD20LBST Universal Satellite Modem Rear Panel Configurations MN-DMD20-20LBST Revision 14 5–3...
Page 160: Compact Flash
(#10-32 threaded stud), is located to the lower right of the module .5.2.2 DC Power Input/Switch The Optional DC Power Input and Switch (Figure 5-1) is available for all DMD20/DMD20 LBST products. The unit may be powered from a 36 – 75 VDC source with a maximum unit power consumption of 3 A.
Page 161: Rx If
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces 5.4.4 RX IF The Receive IF Input Port is a 75-Ohm Female BNC Connector that is used for 70/140 MHz IF. If the customer orders the 70/140 MHz IF, the Transmit IF Output Port is a 75-Ohm Female BNC Connector.
Page 162: Ext Clk (J16)
Rx Minor alarms, or c) Service and Rx minor and Rx Major Alarms. Note 4: Service alarms can be configured to support the RTS Carrier Alarms. Refer to Radyne App Note 230 for addition information on utilizing this feature as Keyline Operation.
Page 163: J19)
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces 5.4.10 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.
Page 164: Remote (J20)
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces 5.4.11 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.
Page 165: Dmd20 Lbst Chassis Connections (Standard)
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces DMD20 LBST Chassis Connections (Standard) 5.5.1 EXT REF (J10) The External Reference Port is a 50-Ohm Female BNC Connector and will accept the following frequencies: 1.0, 1.544, 2.0, 2.048, 5.0, and 10.0 MHz). Input level: 0.1Vpp to 5.0Vpp (Sinewave or Squarewave) 5.5.2 TX (J11)
Page 166: Ext Clk (J16)
Rx Minor alarms, or c) Service and Rx minor and Rx Major Alarms. Note 4: Service alarms can be configured to support the RTS Carrier Alarms. Refer to Radyne App Note 230 for addition information on utilizing this feature as Keyline Operation.
Page 167: J19)
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces 5.5.8 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.
Page 168: Remote (J20)
RJ-45 Connector. Refer to Appendix E and F for proper setup of the TCP-IP interface and Web Browser Setup. 5.6 DMD20/DMD20 LBST Optional Data Interfaces IDR/IBS Interface (Optional) Refer to Figures 5-1 and 5-2 for rear panel configurations.
Page 169: Idr/Ibs Interface (Optional)
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces G.703 IDR/IBS Interface (Optional) The DMD20 supports G703 IDR/IBS interface. Interface options supported are G703 T1/E1/T2/E2 5.8.1 ESC ALARM (J1) The ESC (Engineering Service Circuits) Alarms Port is a 25-Pin Female “D” Connector. Refer to Table 5-6 for pinouts.
Page 170: Audio (J2)
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces 5.8.2 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.
Page 171: Data (J3)
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces 5.8.3 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.
Page 172: Bal (J4)
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces 5.8.4 G.703 BAL (J4) The G.703 Interface Port (Balanced) is a 15-Pin Female “D” Connector. Refer to Table 5-9 for pinouts. Table 5-9. G.703 BAL Port 15-Pin Female “D” Connector (J4) Pin No.
Page 173: Switch Interface (J5)
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces 5.8.5 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. SWITCH INTERFACE Port 68-Pin High-Density Female Connector (J5) Pin No. Signal Name...
Page 174 DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces Table 5-10. SWITCH INTERFACE Port 68-Pin High-Density Female Connector (J5) Pin No. Signal Name Signal Direction IDR ESC Transmit 8 Kbps ESCTXC-A Output Output Clock IDR ESC Transmit 8 Kbps ESCTXD-A Input Output Data...
Page 175 DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces Table 5-10. SWITCH INTERFACE Port 68-Pin High-Density Female Connector (J5) Pin No. Signal Name Signal Direction IDR ESC Backward Alarm ESCBWO 4C No Direction Out - 4 Common External Clock Input - B...
Page 176: Sd (Ddi) (J6)
JS3 is Port 3 JS4 is Port 4 Refer to Figure 5-1 and 5-2 for outline and Appendix J for setup & configuration. The DMD20 & 20LBST supports Radyne HDLC and Comtech HDLC modes, offering compatibility with the SLM5650A Bridge Interface. IMPORTANT MN-DMD20-20LBST Revision 14 5–20...
Page 177: High-Speed Serial Interface (Hssi) (Optional)
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces 5.10 High-Speed Serial Interface (HSSI) (Optional) 5.10.1 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.
Page 178: Dvb/M2P In (J3)
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces 5.11.3 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.
Page 179 DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces Table 5-12b. J3 − M2P In - 25-Pin Female Pin Number Signal Name Direction OUTCLK+ Output OUTCLK- Output CLK+ Input CLK- Input SYNC+ Input SYNC- Input VALID+ Input VALID- Input Input Input Input...
Page 180: Dvb/M2P Out (J4)
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces 5.11.4 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.
Page 181 DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces Table 5-13b. J3 - M2P Out – 25-Pin Female ‘D’ Sub Connector Pin Number Signal Name Direction Output Output CLK+ Output CLK- Output SYNC+ Output SYNC- Output VALID+ Output VALID- Output Output Output...
Page 182: Ethernet Data Interface (Optional)
JS3 is Port 3 JS4 is Port 4 Refer to Figure 5-1 for outline drawings and Appendix J for setup & configuration. The DMD20 & 20LBST supports Radyne HDLC and Comtech HDLC modes, offering compatibility with the SLM5650A Bridge Interface. IMPORTANT 5.13 HSSI / G.703...
Page 183: Audio (J2)
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces 5.13.1 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.
Page 184: Data (J3)
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces 5.13.2 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. Table 5-16 gives pinouts. Table 5-16. 8K DATA Port 15-Pin Female “D” Connector (J3) Pin No.
Page 185: Esc Alarm (J5)
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces 5.13.4 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. ESC ALARM Port 25-Pin Female “D” Connector (J1) Pin No.
Page 186: Sd (Ido) (J9)
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces 5.13.8 SD (IDO) (J9) The Send Data (Insert Data Out) Port (Unbalanced) is a 75-Ohm Female BNC Connector. 5.14 HSSI / Ethernet (J1) The HSSI (High-Speed Serial Interface) (J1) complies with the HSSI Functional and Electrical Specifications.
Page 187: Ethernet Data Interface
DMD20/20LBST Universal Satellite Modem Rear Panel Interfaces 5.15 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...
Page 188: Gige Interface
Refer to Figure 5-1 and 5-2 for outline and Appendix J for setup & configuration. Note Note 1 The DMD20 & 20LBST supports Radyne HDLC and Comtech HDLC modes, offering compatibility with the SLM5650A Bridge Interface. IMPORTANT MN-DMD20-20LBST Revision 14...
Page 189: Chapter 6. Maintenance And Troubleshooting
Chapter 6. MAINTENANCE AND TROUBLESHOOTING This section discusses unit maintenance and troubleshooting for the Universal Satellite Modem. The DMD20/DMD20 LBST contains a Lithium Battery. DANGER OF EXPLOSION exists if the battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer.
Page 190: Alarm Faults
DMD20/20LBST Universal Satellite Modem Maintenance and Troubleshooting Symptom Possible Cause The Modem will not acquire the There is an improper receive input to modem. incoming carrier: The Receive Carrier Level is too low. The Receive Carrier Frequency is outside of the acquisition range.
Page 191: Major Rx Alarms
DMD20/20LBST Universal Satellite Modem Maintenance and Troubleshooting 6.2.1.2 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.
Page 192: Minor Rx Alarms
DMD20/20LBST Universal Satellite Modem Maintenance and Troubleshooting 6.2.1.4 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.
Page 193: Drop And Insert Alarms
DMD20/20LBST Universal Satellite Modem Maintenance and Troubleshooting 6.2.1.5 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 PCM- 30C Modes. T1 Signaling An Insert T1 Yellow Fault occurred.
Page 194: Alarm Masks
DMD20/20LBST Universal Satellite Modem Maintenance and Troubleshooting 6.2.2 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’...
Page 195: Latched Alarms
DMD20/20LBST Universal Satellite Modem Maintenance and Troubleshooting 6.2.2.2 Latched Alarms Latched Alarms are used to catch intermittent failures. If a fault occurs, the fault indication will be latched even if the alarm goes away. After the modem is configured and running, it is recommended that the Latched Alarms be cleared as a final step.
Page 196 DMD20/20LBST Universal Satellite Modem Maintenance and Troubleshooting Table 6-1. IBS Fault Conditions and Actions (includes Drop and Insert) Fault Detected on Action In Earth Action to Terrestrial Action to Satellite Terrestrial Link Station (Across Interface H) (Across Interface D) (Across Interface A)
Page 197: Chapter 7. Technical Specifications
DVB Trellis {2/3, 3/4, 5/6, 7/8, 8/9} Turbo Product Code (Optional) – (SuperCard ONLY) Turbo (BPSK) {21/44,5/16} Turbo (OQPSK/QPSK) {1/2, 3/4, 7/8} Turbo (8PSK) {3/4, 7/8} Turbo (16QAM) {3/4, 7/8} Legacy Turbo Rates {0.495, 0.793} < 5Mbps MN-DMD20-20LBST Revision 14 7–1...
Page 198: Demodulator
DMD20/20LBST Universal Satellite Modem Technical Specifications LDPC/TPC (Optional) LDPC (BPSK) {1/2} LDPC (OQPSK/QPSK) {1/2, 2/3, 3/4} LDPC (8PSK/8QAM) {2/3, 3/4} LDPC (16QAM) {3/4} Turbo (BPSK) {21/44} Turbo (QPSK/OQPSK) {1/2, 2/3, 3/4, 7/8} Turbo (8QAM/8PSK) {2/3, 3/4, 7/8} Turbo (16QAM) {3/4, 7/8}...
Page 199: Plesiochronous Buffer
Closed Network, Satellite Overhead 0.4% Time Slots 1-31 Any combination Terrestrial Interfaces A variety of standard interfaces are available for the DMD20/DMD20 LBST modem in stand-alone applications. IDR/ESC Interface (Optional) G.703 T1 (DSX1) 1.544 Mbps, 100-Ohm Balanced, AMI and B8ZS G.703 E1...
Page 200: High-Speed Serial Interface (Hssi)
DMD20/20LBST Universal Satellite Modem Technical Specifications 7.10 High-Speed Serial Interface (HSSI) HSSI: HSSI, Serial, 50-Pin SCSI-2 Type Connector (Female) 7.11 ASI ASI/RS-422 Parallel: ASI, Serial, 75-Ohm BNC (Female) DVB/M2P, Parallel, RS-422, DB-25 (Female) ASI/LVDS Parallel: ASI, Serial, 75-Ohm BNC (Female) DVB/M2P, Parallel, LVDS, DB-25 (Female) 7.12 DVB/M2P...
Page 201: Environmental
19” W x 19.25” D x 1.75” H (48.26 x 40.64 x 4.45 cm) (48.26 x 48.89 x 4.45 cm) Weight 6.5 Pounds (3.0 Kg) 8.5 pounds (3.83 kg) 7.19 DMD20/DMD20 LBST Data Rate Limits 7.19.1 Non-DVB Modulation Code Rate Min Data Rate...
Page 202 DMD20/20LBST Universal Satellite Modem Technical Specifications Modulation Code Rate Min Data Rate Max Data Rate Option Card QPSK SEQ 7/8 8400 2048000 QPSK TPC 1/2 4582 9545454 Supercard QPSK TPC 3/4 7200 15000000 Supercard QPSK TPC 7/8 8400 17500000 Supercard QPSK TPC .495...
Page 203: Dvb
DMD20/20LBST Universal Satellite Modem Technical Specifications Modulation Code Rate Min Data Rate Max Data Rate Option Card 8PSK/8QAM LDPC 3/4 40500 20000000 LDPC/TPC Card 8PSK TPC 3/4 40000 20000000 LDPC/TPC Card 8PSK TPC 7/8 48000 20000000 LDPC/TPC Card 16QAM VIT 3/4...
Page 204 DMD20/20LBST 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...
Page 205: Ber Specifications
DMD20/20LBST Universal Satellite Modem Technical Specifications 7.20 BER Specifications 7.20.1 BER Performance (Viterbi) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Viterbi Decoder Typical Performance 1E-3 1E-4 1E-5 1E-6 Specification 1/2 Rate 1E-7 Specification 3/4 Rate 1E-8 Specification 7/8 Rate 1E-9 Eb/No in dB Figure 7-1 B/O/QPSK BER Performance (Viterbi) Note: Eb/No values include the effect of using Differential Decoding and V.35...
Page 206: Ber Performance (Sequential)
DMD20/20LBST Universal Satellite Modem Technical Specifications 7.20.2 BER Performance (Sequential) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Sequential Decoder Typical Performance 1E-3 1E-4 1E-5 1E-6 Specification 1/2 Rate Specification 1E-7 3/4 Rate Specification 1E-8 7/8 Rate 1E-9 Eb/No in dB Figure 7-2 B/O/QPSK BER Performance (Sequential) Note: Eb/No values include the effect of using Differential Decoding and V.35...
Page 207: Ber Performance (Viterbi With Reed-Solomon)
DMD20/20LBST Universal Satellite Modem Technical Specifications 7.20.3 BER Performance (Viterbi with Reed-Solomon) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Viterbi Decoder Reed Solomon Typical Performance 1E-3 1E-4 1E-5 Specification 1/2 Rate 1E-6 Specification 1E-7 3/4 Rate 1E-8 1E-9 Eb/No in dB Figure 7-3 B/O/QPSK BER Performance (Viterbi w/R-S) Note: Eb/No values include the effect of using Differential Decoding.
Page 208: Ber Performance ((O)Qpsk Turbo)
DMD20/20LBST Universal Satellite Modem Technical Specifications 7.20.4 BER Performance ((O)QPSK Turbo) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Turbo Decoder Specification Turbo 3/4 1E-3 1E-4 Specification Specification Turbo 1/2 Turbo 7/8 1E-5 1E-6 1E-7 Typical Performance 1E-8 1E-9 Eb/No in dB Figure 7-4 BPSK (O)QPSK BER Performance (Turbo) MN-DMD20-20LBST Revision 14 7–12...
Page 209: Ber Performance (B/O/Qpsk Turbo)
DMD20/20LBST Universal Satellite Modem Technical Specifications 7.20.5 BER Performance (B/O/QPSK Turbo) 1E-1 B/O/QPSK Uncoded Theory 1E-2 Turbo Decoder Typical Performance 1E-3 1E-4 1E-5 1E-6 Specification 1E-7 Turbo 0.495 Specification 1E-8 Turbo 0.793 1E-9 Eb/No in dB Figure 7-5 B/O/QPSK BER Performance (Turbo) Note: Eb/No values include the effect of using interleaving and maximum iterations.
Page 210: Ber Performance (8Psk Turbo)
DMD20/20LBST Universal Satellite Modem Technical Specifications 7.20.6 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 Typical Performance 1E-5 1E-6 1E-7 1E-8 1E-9 Eb/No in dB Figure 7-6 BPSK 8PSK BER Performance (Turbo) MN-DMD20-20LBST Revision 14 7–14...
Page 211: Ber Performance (8Psk Trellis)
DMD20/20LBST Universal Satellite Modem Technical Specifications 7.20.7 BER Performance (8PSK Trellis) 1E-1 8PSK Uncoded Theory Trellis 1E-2 Decoder Typical Performance 1E-3 1E-4 1E-5 1E-6 Specification 2/3 Rate 1E-7 Specification 2/3 Rate w/RS 1E-8 1E-9 Eb/No in dB Figure 7-7 8PSK BER Performance (Trellis) Note: Eb/No values include the effect of using Differential Decoding and V.35...
Page 212: Ber Performance (8Psk Turbo)
DMD20/20LBST Universal Satellite Modem Technical Specifications 7.20.8 BER Performance (8PSK Turbo) 1E-1 8PSK Uncoded Theory Turbo 1E-2 Decoder Typical Performance 1E-3 1E-4 1E-5 1E-6 1E-7 1E-8 Specification Turbo 0.793 1E-9 Eb/No in dB Figure 7-8 8PSK BER Performance (Turbo) Note: Eb/No values include the effect of using interleaving and maximum iterations.
Page 213: Ber Performance (16Qam Viterbi)
DMD20/20LBST Universal Satellite Modem Technical Specifications 7.20.9 BER Performance (16QAM Viterbi) 1E-1 16QAM Uncoded Theory Viterbi 1E-2 Decoder Typical Performance 1E-3 1E-4 1E-5 1E-6 Specification 3/4 Rate 1E-7 Specification 7/8 Rate 1E-8 1E-9 Eb/No in dB Figure 7-9 16QAM BER Performance (Viterbi) Note: Eb/No values include the effect of using Differential Decoding and V.35...
Page 214: Ber Performance (16Qam Viterbi With Reed-Solomon)
DMD20/20LBST Universal Satellite Modem Technical Specifications 7.20.10 BER Performance (16QAM Viterbi with Reed-Solomon) 1E-1 16QAM Uncoded Theory Viterbi Decoder - 1E-2 Reed Solomon Typical Performance 1E-3 1E-4 1E-5 1E-6 Specification 3/4 Rate w/RS 1E-7 Specification 7/8 Rate w/RS 1E-8 1E-9...
Page 215: Ber Performance (16Qam Turbo)
DMD20/20LBST Universal Satellite Modem Technical Specifications 7.20.11 BER Performance (16QAM Turbo) 1E-1 16QAM Uncoded Theory 1E-2 Turbo Decoder Typical Performance 1E-3 1E-4 1E-5 1E-6 Turbo 0.495 1E-7 Turbo 0.793 1E-8 1E-9 Eb/No in dB Figure 7-11 BPSK 16QAM BER Performance (Turbo) Note: Eb/No values include the effect of using interleaving and maximum iterations.
Page 216: Ber Performance (16Qam Turbo)
DMD20/20LBST Universal Satellite Modem Technical Specifications 7.20.12 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 Typical Performance 1E-5 1E-6 1E-7 1E-8 1E-9 Eb/No in dB Figure 7-12 BPSK 16QAM BER Performance (Turbo) MN-DMD20-20LBST Revision 14 7–20...
Page 217: 1/2 Rate B/O/Qpsk Ber Performance (Ldpc)
DMD20/20LBST Universal Satellite Modem Technical Specifications 7.20.13 1/2 Rate B/O/QPSK BER Performance (LDPC) 1E-1 B/O/QPSK Uncoded Theory 1E-2 1/2 Rate LDPC B/O/QPSK Uncoded Theory Decoder 1E-3 1E-4 Specification 1/2 Rate 1E-5 1E-6 Typical Performance 1E-7 1E-8 1E-9 Eb/No in dB Figure 7-13 –...
Page 218: 2/3 Rate Q/8Psk/8Qam Ber Performance (Ldpc)
DMD20/20LBST Universal Satellite Modem Technical Specifications 7.20.14 2/3 Rate Q/8PSK/8QAM BER Performance (LDPC) 1E-1 8PSK Uncoded Theory 1E-2 2/3 Rate LDPC B/O/QPSK Uncoded Theory Decoder 1E-3 QPSK Specification 1E-4 Typical Performance 8QAM Specification 1E-5 8PSK Specification 1E-6 1E-7 1E-8 1E-9 Eb/No in dB Figure 7-14 –...
Page 219: 3/4 Rate Q/8Psk, 8/16Qam Ber Performance (Ldpc)
DMD20/20LBST Universal Satellite Modem Technical Specifications 7.20.15 3/4 Rate Q/8PSK, 8/16QAM BER Performance (LDPC) Figure 7-15 – Rate 3/4 Q/8PSK/8QAM BER Performance (LDPC) MN-DMD20-20LBST Revision 14 7–23...
Page 220 DMD20/20LBST Universal Satellite Modem Technical Specifications 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 1E-3 4.2 dB 5.3 dB 6.2 dB 3.9 dB 4.9 dB 5.8 dB 1E-4 4.8 dB...
Page 221 DMD20/20LBST 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...
Page 222 DMD20/20LBST Universal Satellite Modem Technical Specifications Table 7-7 - 16QAM BER Performance (Viterbi) 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...
Page 223 DMD20/20LBST 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 1E-3 3.2 dB 4 dB 2.8 dB 3.7 dB 1E-4 3.4 dB 4.1 dB 3 dB 3.8 dB...
Page 224: Agc Output Voltage
DMD20/20LBST Universal Satellite Modem Technical Specifications Table 7-14 - 8PSK / 8-QAM Rate BER Performance (LDPC) 8PSK 8-QAM Specification Typical Specification Typical 2/3 Rate 3/4 Rate 2/3 Rate 3/4 Rate 2/3 Rate 3/4 Rate 2/3 Rate 3/4 Rate 1E-5 5.6 dB 5.2 dB...
Page 225 DMD20/20LBST Universal Satellite Modem Technical Specifications Figure 7-16 AGC Voltage Monitor MN-DMD20-20LBST Revision 14 7–29...
Page 226 DMD20/20LBST Universal Satellite Modem Technical Specifications BLANK PAGE MN-DMD20-20LBST Revision 14 7–30...
Page 227: Appendix A. Product Options
HSSI High-Speed Serial Interface 50-Pin SCSI-2 Type Connector. Complies with Cisco Systems in HSSI Design Specification, Revision 3.0. Ethernet Data Interface Four RJ-45, Auto-Crossover, Auto-Sensing, 10/100 Ethernet Data Ports. Complies with IEEE 802.3 and IEEE 802.3u. MN-DMD20-20LBST Revision 14 A–1...
Page 228: Gigi Ethernet Data Interface
DMD20/20LBST Universal Satellite Modem Product Options Gigi Ethernet Data Interface Three RJ-45, Auto-Crossover, Auto-Sensing, 10/100/1000 Ethernet Data Ports. Complies with IEEE 802.3 and IEEE 802.3u. A.10 HSSI / G.703 High-Speed Serial Interface 50-Pin SCSI-2 Type Connector. Complies with Cisco Systems in HSSI Design Specification, Revision 3.0.
Page 229: Appendix B. Front Panel Upgrade Procedure
INSTALLED indicates that the option is already available as part of the modems feature set. HW & KEY REQ indicates that additional hardware is required to support the option. Contact your Comtech sales representative for more information regarding the required hardware upgrade. MN-DMD20-20LBST Revision 14 B–1...
Page 230 DMD20/20LBST Universal Satellite Modem Front Panel Upgrade Procedure KEY CODE REQ indicates that the desired option is available as a front panel upgrade. Contact Comtech with the Unit ID and Desired Upgrades. The modem’s Unit ID can be found on the front panel as follows: From the modem’s Main Menu, scroll right to the SYSTEM Menu.
Page 231: Demonstration Procedure
DMD20/20LBST Universal Satellite Modem Front Panel Upgrade Procedure 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.
Page 232 DMD20/20LBST Universal Satellite Modem Front Panel Upgrade Procedure Contact Comtech with the Unit ID and Request a Demonstration. The modem’s Unit ID can be found on the front panel as follows: From the modem’s Main Menu, scroll right to the SYSTEM Menu.
Page 233: Running In Demonstration Mode
DMD20/20LBST Universal Satellite Modem Front Panel Upgrade Procedure B.4.1 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.
Page 234: Canceling Demonstration Mode
DMD20/20LBST Universal Satellite Modem Front Panel Upgrade Procedure B.4.2 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.
Page 235: Appendix C. Carrier Control
When using the terminal, the modulator is turned off while re-programming modulator functions that may alter the output spectrum, and but the output is automatically turned on after the change. MN-DMD20-20LBST Revision 14 C–1...
Page 236: Carrier Vsat
DMD20/20LBST Universal Satellite Modem Carrier Controls Carrier VSat 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. When using the terminal, the modulator is turned off while re- programming modulator functions that may alter the output spectrum, and the user is required to manually turn on the output after the reprogramming (same as “Carrier On”).
Page 237: Appendix D. Strap Codes
16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 16/15 QPSK 1536 16/15 QPSK 1920 16/15 QPSK 2048 16/15 QPSK 2048 16/15 QPSK 1544 V.35 (IESS) QPSK 2048 V.35 (IESS) QPSK 6312 V.35 (IESS) QPSK MN-DMD20-20LBST Revision 14 D–1...
Page 238 DMD20/20LBST Universal Satellite Modem Strap Codes Table D-1. Strap Codes Dis = Disable 8448 V.35 (IESS) QPSK NONE V.35 (IESS) QPSK NONE V.35 (IESS) QPSK NONE V.35 (IESS) QPSK NONE V.35 (IESS) QPSK NONE V.35 (IESS) QPSK NONE V.35 (IESS)
Page 239 DMD20/20LBST Universal Satellite Modem Strap Codes Table D-1. Strap Codes Dis = Disable 1920 16/15 QPSK 6312 NONE V.35 (IESS) QPSK 8448 NONE V.35 (IESS) QPSK 3152 NONE V.35 (IESS) QPSK 3152 NONE V.35 (IESS) QPSK 3264 NONE V.35 (IESS)
Page 240 DMD20/20LBST Universal Satellite Modem Strap Codes Table D-1. Strap Codes Dis = Disable 1024 16/15 QPSK 1024 16/15 QPSK 1536 16/15 QPSK 1088 16/15 QPSK 1088 16/15 QPSK 1152 16/15 QPSK 1152 16/15 QPSK 1216 16/15 QPSK 1216 16/15 QPSK...
Page 241: Sample Applications
DMD20/20LBST Universal Satellite Modem Strap Codes Table D-1. Strap Codes Dis = Disable 4000 NONE V.35 (IESS) QPSK 4000 NONE V.35 (IESS) QPSK 1344 16/15 QPSK Sample Applications The following section provides brief application notes for operating the modem and explains by example how to configure the modem for some of the most popular configurations.
Page 242: Operational Case Examples
DMD20/20LBST Universal Satellite Modem Strap Codes D.2.1 Operational Case Examples IMPORTANT For best results always begin setup by setting the data rate to 512 Kbps. This data rate is applicable for all modes and as such provides a convenient launch point for setting up the modem. Any mode of operation can be entered from this starting point.
Page 243 DMD20/20LBST Universal Satellite Modem Strap Codes 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...
Page 244 DMD20/20LBST Universal Satellite Modem Strap Codes Demodulator: Method 1 - Under Interface Menu: Set Interface type Set Buff clock selection Set Buffer Size Set Framing to 1/15: Set mode to IBS: Under Demod IF Menu: Set desired Rx frequency Under Demod Data Menu:...
Page 245 DMD20/20LBST Universal Satellite Modem Strap Codes Demodulator: Method 1 - Under Interface Menu: Set Interface type Set Buff clock selection Set Buffer Size Set mode to: Closed Net Under Demod IF Menu: Set desired Rx frequency Under Demod data Menu:...
Page 246 DMD20/20LBST Universal Satellite Modem Strap Codes BLANK PAGE MN-DMD20-20LBST Revision 14 D–10...
Page 247: Appendix E. Tcp/Ip Ethernet Setup
BOOTp Tag setting. c. NON-VOL: This will allow for setting up all required IP Addresses and will store the information to the non-volatile memory. Upon power cycle, the modem will restore the saved settings into the correct fields. MN-DMD20-20LBST Revision 14 E–1...
Page 248 010.000.001.001. 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).
Page 249: Network Configuration Summary
DMD20/20LBST Universal Satellite Modem TCP/IP Ethernet Setup Network Configuration Summary If the above steps were followed and the information was entered, then the following would be the TCP / IP configuration summary for a ‘no router specified’ setup: 1. Boot Mode = NON-VOL 2.
Page 250 DMD20/20LBST Universal Satellite Modem TCP/IP Ethernet Setup 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.
Page 251 DMD20/20LBST Universal Satellite Modem TCP/IP Ethernet Setup complete the PC Configuration. Note: some computers may require that the computer be restarted for the changes to take effect. Internet Protocol (TCP/IP) Properties Box 5. To reconnect the computer to a network, select the “Obtain an IP address automatically”...
Page 252: Testing The Ethernet Connection Using The Ping Program (Optional
DMD20/20LBST Universal Satellite Modem TCP/IP Ethernet Setup E.4.3 Testing the Ethernet connection using the Ping Program (Optional) Use the Ping command to report if the Host (Equipment) is correctly responding. Open the MSDOS Command Prompt and give a Ping command as shown in the following example.
Page 253: Appendix F. Web Interface Setup Guide
Appendix F. WEB INTERFACE SETUP GUIDE F.1 Introduction The web interface lets Radyne products connect and communicate through the Ethernet port. The connection is a 10Base-T Ethernet connection. You use the web interface to control and monitor the parameters and functions of these connected units.
Page 254: Ip Address
DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide F.2.2 IP Address IMPORTANT Before you set an IP address, contact the IT authority in your organization for help. The BOOT MODE setting controls access to the IP address for the unit. The unit is shipped from the factory with the BOOT MODE set to DEFAULT (a fixed address that is not accessible).
Page 255: User Account Data
DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide F.3.2 User Account Data IMPORTANT All entries are case-sensitive. Parameter Character type Maximum Minimum Restrictions User ID ASCII Printable Characters None Authentication Password ASCII Printable Characters None Web User ASCII Printable Characters...
Page 256: Edit The User Id
DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide IMPORTANT All entries are case-sensitive. To set up a User Account, do these steps: 1. Edit the User ID. 2. Edit the Access Group. 3. Edit the Authentication Password. F.1.1 Edit the User ID.
Page 257: Reset A User Account
2. USER 2: This has the same menu structure as USER 1. 3. USER 3: This has the same menu structure as USER 1. Radyne’s Web configuration allows for the support of 3 user profiles. These are configured through the ‘PASSWORD/SETUP ACCESS section in the Web Browser.
Page 258: Equipment Website
DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide F.4 Equipment Website Once you know that the modem is accessible through the internet, do these steps: 1. Start the internet browser. 2. Type the modem’s IP address in the address field, and then press [Enter].
Page 259: Log In To The Equipment Website
DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide The Introduction page shows general information, such as: Type of equipment • Equipment features and capabilities overview • Hardware and software options that are available • Other links are available on the Introduction page: Links to the PDF files that contain technical specifications and product options •...
Page 260 DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide F.5 Web Page Appearance This page displays the Monitor and Control section of the modem web interface. The page has an appearance that resembles the DMD2050E layout. The front panel display section of the page shows the current front panel alarm status of the modem.
Page 261: Configure Web Browsers For The Radyne Web Interface
Web Browser Setup Guide F.6 Configure Web Browsers for the Radyne WEB Interface F.6.1 Configure Internet Explorer 9 for the Radyne WEB Interface Click the Compatibility View button on the address bar. When Compatibility View is active, the color of the button is blue.
Page 262: Change The Encoding
DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide F.6.2.1 Change the encoding: Click View on the Firefox menu bar. Select Character Encoding and click Western (ISO-8859-1). The page refreshes and shows the correct values. MN-DMD20-20LBST Revision 14 F–10...
Page 263: Install The Internet Explorer Tab V2 Add-On
2-ff-36/ Download and install IE Tab V2. After IE Tab V2 is installed, Firefox restarts. Go to Tools / IE Tab 2 Options and add the Radyne product IP address to the Sites Filter. In this example, Address 192.168.1.102 was added earlier.
Page 264: Configure Chrome For The Radyne Web Browser
DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide F.6.3 Configure Chrome for the Radyne WEB Browser When you open the Monitor & Control window, you may see the error message “This webpage is not available”. Click the Chrome address bar.
Page 265: Change The Encoding
DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide F.6.3.1 Change the encoding On the Chrome address bar, click the wrench icon (Customize and Control Google Chrome). Go to Tools / Encoding and click Western (ISO-8859-1). The page refreshes and shows the correct values.
Page 266: Install The Internet Explorer Tab For Chrome
DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide F.6.3.2 Install the Internet Explorer Tab for Chrome The Internet Explorer (IE) Tab lets you open WEB browser pages in Internet Explorer 7 mode. The link to install IE Tab is: https://chrome.google.com/webstore/search/IE%20Tab?utm_source=chrome-ntp-icon To install IE Tab, click + ADD TO CHROME next to IE Tab.
Page 267: Configure Safari For The Radyne Web Browser
DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide F.6.4 Configure Safari for the Radyne WEB Browser IMPORTANT First, make sure to empty the browser cache. F.6.4.1 Empty the browser cache On the Safari menu bar, click Edit and then click Empty Cache...
Page 268: Reset The Ethernet M&C Port
DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide F.6.4.2 Reset the Ethernet M&C port To reset the Ethernet M&C port, either 1) cycle the electrical power OFF and ON, or, 2) re-enter the Modem IP Address. Re-entering the Modem IP Address avoids traffic disruption.
Page 269 DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide On the Monitor & Control, Password Setup or IP Administration windows, some fields may be blank or contain Update. To correct the display, change the encoding. NOTE If you leave a window and return, it may be necessary to correct the display again.
Page 270: Change The Encoding
DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide F.6.4.4 Change the encoding Click View on the Safari menu bar. Select Text Encoding and click Western European. (The Default selection is not applicable.) The page refreshes and shows the correct values.
Page 271: Configure Maxthon For The Radyne Web Browser
DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide F.6.5 Configure Maxthon for the Radyne WEB Browser On the Monitor & Control, Password Setup or IP Administration windows, some fields may be blank or contain Update. To correct the display, either 1) change the browser mode, or, 2) change the encoding.
Page 272: Change The Browser Mode
DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide F.6.5.1 Change the browser mode Two browser modes are possible: Ultra Mode (default) Retro Mode Click the browser mode icon at the right of the address bar. Select Retro Mode . The page refreshes and shows the correct values.
Page 273: Change The Encoding
DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide F.6.5.2 Change the encoding On the Monitor & Control page, right click to open the browser menu. Select Encoding, and then click the encoding type that is already selected. The page refreshes and shows the correct values.
Page 274 DMD20/20LBST Universal Satellite Modem Web Browser Setup Guide BLANK PAGE MN-DMD20-20LBST Revision 14 F–22...
Page 275: Appendix G. Aupc Operation
Radyne AUPC can be set to operate on either or both directions of a link but always require a bi- directional channel. Enabling AUPC on one side of the link will activate AUPC on the distant end of the link.
Page 276: Ef Aupc
EF AUPC, also provides some control over the rate of power change; while the Radyne and Near Side AUPC use a optimized rate for rain fade compensation.
Page 277 DMD20/20LBST Universal Satellite Modem AUPC Operation The AUPC Menu Functions and their descriptions are shown on Table G-1 and G-2. Table G-1. Local AUPC Functions Function AUPC Available Options Description AUPC MODE DISABLE, NEARSIDE, RADYNE, Enables/Disables the AUPC to function...
Page 278 DMD20/20LBST Universal Satellite Modem AUPC Operation BLANK PAGE MN-DMD20-20LBST Revision 14 G–4...
Page 279: Appendix H. Drop And Insert (D&I
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.
Page 280 DMD20/20LBST Universal Satellite Modem Drop and Insert (D&I) Figure H-1 Looped Modems Figure H-2 Looped Modems with Separate D&I Trunks MN-DMD20-20LBST Revision 14 H–2...
Page 281: Drop Only
DMD20/20LBST Universal Satellite Modem Drop and Insert (D&I) H.1.1 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).
Page 282: Mode Selection
DMD20/20LBST Universal Satellite Modem Drop and Insert (D&I) H.1.3 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.
Page 283: T1-D4/T1-D4-S
DMD20/20LBST Universal Satellite Modem Drop and Insert (D&I) H.1.3.5 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.
Page 284: Drop And Insert Mapping
DMD20/20LBST Universal Satellite Modem Drop and Insert (D&I) H.1.5 Drop and Insert Mapping The following displays under Interface D&I Setup (both Tx and Rx), are editing displays only: SATCh Enter to Edit Any changes made in these displays are made on the screen, but are not entered into the modem.
Page 285 DMD20/20LBST Universal Satellite Modem Drop and Insert (D&I) Use the Up or Down Arrow Key to until the right hand portion displays “TX ACTIVE”. The mapping display should now look like this: Copy TX EDIT > TX ACTIVE Push <ENTER> to enter this command. This tells the modem to configure to the settings that were assigned in the Channel/Timeslot display.
Page 286: Configuring The Modem For Drop And Insert
DMD20/20LBST Universal Satellite Modem Drop and Insert (D&I) Configuring the Modem for Drop and Insert Several dependencies exist when configuring the modem for Drop and Insert (D&I). The following paragraphs explain these dependencies and provide the user with the information required to ensure smooth transition into D&I and to minimize the potential impact of these...
Page 287: Operational Network Specification
DMD20/20LBST Universal Satellite Modem Drop and Insert (D&I) H.2.2 Operational Network Specification The Network Specification of the Modem often determines which additional menus and displays are available for use. The D&I Mode-specific menus are not displayed unless the Network Specification of the modem is set to D&I. Therefore, the second step in configuring the modem should be to set the Network Specification to D&I.
Page 288: D&I Sample Configurations And D&I Clock Setup Options
DMD20/20LBST Universal Satellite Modem Drop and Insert (D&I) H.2.4 D&I Sample Configurations and D&I Clock Setup Options The following are several examples of how to configure the modem for D&I. Also, refer to Figures 3-14 through 3-17 for the D&I Clocking Setup Options Available.
Page 289 DMD20/20LBST Universal Satellite Modem Drop and Insert (D&I) Under Demodulator: Set Network Spec. = Drop & Insert Multidestinational Remote Site Programming Example 2: Drop 512 Kbps from a T1 trunk, 3/4 Rate Viterbi. Extract 512 Kbps from a 1536 Kbps carrier and insert into a T1 trunk, 3/4 Rate Viterbi.
Page 290 DMD20/20LBST Universal Satellite Modem Drop and Insert (D&I) Figure H-8 Single Truck Figure H-9 Rx Only With Trunk Figure H-10 Rx Only No Trunk MN-DMD20-20LBST Revision 14 H–12...
Page 291: D&I Maps And Map Editing
DMD20/20LBST Universal Satellite Modem Drop and Insert (D&I) 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).
Page 292 DMD20/20LBST Universal Satellite Modem Drop and Insert (D&I) Table H-2. D&I ROM Maps T1/E1 Time Slot 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 9 10 11 12 1...
Page 293 DMD20/20LBST Universal Satellite Modem Drop and Insert (D&I) ROM Map 2 could be used as the template for an Active Receive (Insert) Map within a demodulator configured for 128 Kbps operation. The demodulated data in the receive path would be inserted into the first two time slots of the T1 or E1 frame. The Insert Multiplexer would know to look only at the first two entries in the Active Receive table and would ignore the other 28 entries.
Page 294 DMD20/20LBST Universal Satellite Modem Drop and Insert (D&I) BLANK PAGE MN-DMD20-20LBST Revision 14 H–16...
Page 295 If the modem has the appropriate hardware, but the software revision is prior to AY, you will need to download the latest modem firmware from the Radyne FTP website. The following menus show how to find out if the modem has the required prerequistes.
Page 296: Appendix I. Efficient Drop And Insert (D&I
DMD20/20LBST Universal Satellite Modem Efficient Drop & Insert 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 &...
Page 297: Calculating The Required Satellite Bandwidth
Automatic Uplink Power Control. By comparison, the Drop & Insert open network standard requires 4267 bps per slot, so by utilizing Efficient Drop and Insert, Radyne customers can realize a bandwidth savings of over 4000 bps per slot.
Page 298: Summary And Examples
DMD20/20LBST Universal Satellite Modem Efficient Drop & Insert I.3.4.1 Summary and Examples: These examples 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)
Page 299 DMD20/20LBST Universal Satellite Modem Efficient Drop & Insert Example 2a: 10 Drop Slots with T1-D4 framing, standard ES to ES overhead For 10 Drop Slots, the Data Rate would be 10 * 64000 or 640000 bps The Efficient D&I Rate would be 640000 + (10 * 250) bps = 642500 bps The Drop &...
Page 300 DMD20/20LBST Universal Satellite Modem Efficient Drop & Insert BLANK PAGE MN-DMD20-20LBST Revision 14 I–6...
Page 301: Appendix J. Ethernet Data Interface Setup
Polarity will default to Normal. In addition, the Buffer Clock will default to RxSat and the Buffer Clock Polarity will default to Normal. The DMD20 supports Radyne HDLC and Comtech HDLC modes, offering compatibility with the SLM5650A Bridge Interface. IMPORTANT J.1.1 Ethernet Flow Control...
Page 302: Half-Duplex Flow Control
DMD20/20LBST Universal Satellite Modem Ethernet Data Interface Setup J.1.1.1 Half-Duplex Flow Control In half-duplex mode, the unit uses industry standard backpressure to support flow control as follows: When available buffer space is almost gone, the modem will force a collision on the input port when it senses an incoming packet.
Page 303: Set Up The Ethernet Bridge To Operate Like A Fifo
DMD20/20LBST Universal Satellite Modem Ethernet Data Interface Setup When Strict Priority is selected, the interface transmits packets from the highest priority queue until it is empty. It then begins transmitting data from the next highest priority queue. If higher priority data arrives, the interface finishes the current packet and then goes back to transmitting packets from the higher priority queue until it is again empty.
Page 304: Packet Statistics
DMD20/20LBST Universal Satellite Modem Ethernet Data Interface Setup J.1.6 Packet Statistics The following statistics are available under the Monitor Menu when the Ethernet Data Interface is selected. Total Packets: This Counter displays the total number of Ethernet packets received from the satellite.
Page 305: Metric Conversions
METRIC CONVERSIONS Units of Length Unit Millimeter Centimeter Inch Foot Yard Meter Kilometer Mile 1 millimeter 0.0394 0.0033 0.0011 0.001 1 x 10 6.214 x 10 1 centimeter 0.3937 0.0328 0.0109 0.01 1 x 10 6.214 x 10 1 inch 25.4 2.54 0.0833...
Page 306 2114 85281 WEST TH STREET TEMPE ARIZONA 480 • 333 • 2200 PHONE 480 • 333 • 2161...

This manual is also suitable for:

Dmd20lbst

Radyne DMD20 Installation And Operation Manual

Chapter 1. Introduction

Overview

Configurations

Function Accessibility

Chapter 2. Installation

Unpacking and Inspection

Installation Requirements

Removal and Assembly

Mounting Considerations

Initial Configuration Check

Modulator Checkout

Chapter 3. Theory of Operation

Modem Hardware

Functional Block Diagram

Monitor & Control (M&C) Subsystem

Async Port / ES-ES Communications

Internal Clock

Loopback Features (Terrestrial & IF)

Clocking Options

RS530/422/V.35 Interface (Standard)

Reed-Solomon Codec

Asynchronous Overhead Operation (Framing/Multiplexer Capability)

Standard IBS Mode

Asynchronous Multiplexer Mode

ESC Backward Alarms

Satellite Control Channel (SCC)

Doubletalk Carrier-In-Carrier Option

EDMAC Satellite Framing/Deframing Mode

Locating the ID Code Operational Procedure

Strap Codes

Chapter 4. User Interfaces

User Interfaces

Front Panel User Interface

Parameter Setup

Front Panel Control Screen Menus

Terminal Mode Control

Terminal Port User Interface

Connecting the Terminal

Terminal Screens

Chapter 5. Rear Panel Interfaces

DMD20/DMD20 LBST Connections

Compact Flash

Power Input Modules

DMD20 Chassis Connections (Standard)

DMD20 LBST Chassis Connections (Standard)

DMD20/DMD20 LBST Optional Data Interfaces

IDR/IBS Interface (Optional)

Ethernet Data Interface (Optional)

High-Speed Serial Interface (HSSI) (Optional)

ASI/DVB/M2P Interface (Optional)

Ethernet Data Interface (Optional)

HSSI / Ethernet (J1)

Ethernet Data Interface

Gige Interface

Chapter 6. Maintenance and Troubleshooting

Periodic Maintenance

Troubleshooting

IBS Fault Conditions and Actions

Chapter 7. Technical Specifications

Data Rates

Modulator

Demodulator

Plesiochronous Buffer

Monitor and Control

DMD20/DMD20 LBST Drop and Insert (Optional)

Terrestrial Interfaces

IDR/ESC Interface (Optional)

Ibs/Synchronous Interface (Standard)

High-Speed Serial Interface (HSSI)

Asi

Dvb/M2P

Ethernet Data Interface (Optional)

Gigi Ethernet Data Interface (Optional)

Hssi / G703

Hssi /Ethernet

Environmental

Physical

DMD20/DMD20 LBST Data Rate Limits

BER Specifications