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Radyne DMD20 LBST Installation And Operation Manual

Manual is about: Universal Satellite Modem

Summary of DMD20 LBST

  • Page 1

    Part number mn-dmd20-20lbst revision 14 comtech ef data is an as9100 rev b / iso9001:2000 registered company 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. Dmd20...

  • Page 3

    Er-dmd20lbs-ea14 rev - plm c-0026230 errata a for mn-dmd20-20lbst rev 14 comtech ef data documentation update subject: chapter 7, technical specifications errata part number: er-dmd20lbs-ea14 (errata documents are not subject to revision.) plm co number: c-0026230 comments: see attached page(s). The...

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    Er-dmd20lbs-ea14 rev - plm c-0026230 blank page.

  • Page 5: Chapter 7. Technical

    Mn-dmd20-20lbst revision 14 7–1 chapter 7. Technical specifications 7.1 data rates refer to section 7.18. 7.2 modulator modulation bpsk, qpsk, and oqpsk (8psk, 16qam optional) if tuning range 50 to 90, 100 to 180 mhz in 1 hz steps l-band tuning range 950 to 2050 mhz in 1 hz steps impedance if, 75-oh...

  • Page 6

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–2 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, ...

  • Page 7

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–3 decoder options reed-solomon intelsat (dvb optional, custom rates optional) descrambler ccitt v.35 or ibs (others optional) acquisition range programmable ±1 khz to ± 255 khz sweep delay value 100 msec to...

  • Page 8

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–4 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) a...

  • Page 9

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–5 7.17 environmental prime power 100 to 240 vac, 50 to 60 hz, 40 watts maximum 48 vdc (optional) operating temperature 0 to 50°c, 95% humidity, non-condensing storage temperature -20 to 70°c, 99% humidity, ...

  • Page 10

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–6 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 tp...

  • Page 11

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–7 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...

  • Page 12

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–8 188 mode modulation code rate min data rate max data rate bpsk vit 1/2 2400 4607843 bpsk vit 2/3 2950 6143790 bpsk vit 3/4 3318 6911764 bpsk vit 5/6 3687 7679738 bpsk vit 7/8 3871 8063725 qpsk vit 1/2 442...

  • Page 13

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–9 7.20 ber specifications 7.20.1 ber performance (viterbi) 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 descrambli...

  • Page 14

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–10 7.20.2 ber performance (sequential) 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. 1e-9 1e-8 1e-...

  • Page 15

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–11 7.20.3 ber performance (viterbi with reed-solomon) 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. 1e-9 1e-8 1e-7 1e...

  • Page 16

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–12 7.20.4 ber performance (turbo) figure 7-4 dmd20/20lbst b/o/qpsk ber performance (turbo) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 be r eb/no in db turbo decoder specificat...

  • Page 17

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–13 7.20.5 ber performance (8psk trellis) figure 7-5 dmd20/20lbst 8psk ber performance (trellis) note: eb/no values include the effect of using interleaving and maximum iterations. 1e-9 1e-8 1e-7 1e-6 1e-5 1...

  • Page 18

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–14 7.20.6 ber performance (8psk turbo) figure 7-6 dmd20/20lbst 8psk ber performance (turbo) note: eb/no values include the effect of using interleaving and maximum iterations 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1...

  • Page 19

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–15 7.20.7 ber performance (16qam viterbi) figure 7-7 dmd20/20lbst 16qam ber performance (viterbi) note: eb/no values include the effect of using differential decoding and v.35 descrambling. 1e-9 1e-8 1e-7 1...

  • Page 20

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–16 7.20.8 ber performance (16qam viterbi with reed-solomon) figure 7-8 dmd20/20lbst 16qam ber performance (viterbi w/r-s) note: eb/no values include the effect of using differential decoding. 1e-9 1e-8 1e-7...

  • Page 21

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–17 7.20.9 ber performance (16qam turbo) figure 7-9 dmd20/20lbst 16qam ber performance (turbo) note: eb/no values include the effect of using interleaving and maximum iterations. 1e-9 1e-8 1e-7 1e-6 1e-5 1e-...

  • Page 22

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–18 7.20.10 ber performance ((o)qpsk turbo) figure 7-10 dmd20/20lbst o/qpsk ber performance (turbo) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 be r eb/no in db turbo decoder sp...

  • Page 23

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–19 7.20.11 ber performance (bpsk turbo) figure 7-11 dmd20/20lbst bpsk ber performance (turbo) note: bpsk tpc 5/16 available with pl/5051 turbo codec hardware. 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 ...

  • Page 24

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–20 7.20.12 ber performance (8psk turbo) figure 7-12 dmd20/20lbst 8psk ber performance (turbo) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 be r eb/no in db turbo decoder specifi...

  • Page 25

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–21 7.20.13 ber performance (16qam turbo) figure 7-13 dmd20/20lbst 16qam ber performance (turbo) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 be r eb/no in db turbo deco...

  • Page 26

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–22 7.20.14 b/o/qpsk ber performance (ldpc) figure 7-14 – dmd20/20lbst b/o/qpsk ber performance (ldpc) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 be r eb/no in db ldpc decoder ...

  • Page 27

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–23 7.20.15 8psk/8qam ber performance (ldpc) figure 7-15 – dmd20/20lbst 8psk/8qam ber performance (ldpc) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 be r eb/no in db ldpc decode...

  • Page 28

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–24 7.20.16 16qam ber performance (ldpc) figure 7-16 – dmd20/20lbst 16qam ber performance (ldpc) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 be r eb/no in db ldpc decoder typica...

  • Page 29

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–25 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 6.1 db 7.1 db 4.5 db 5.6 db 6.5 db 1e-5 5.5 db 6.8 db 7.9 db 5.1 db 6.3 db 7.2 db 1e-6 6.1...

  • Page 30

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–26 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 1e-5 8.2 db 6.3 db 6.4 db 5.4 db 1e-6 9 db 6.5 db 7.2 db 5.6 db 1e-7 9.8 db 6.7 db 8.1 db 5...

  • Page 31

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–27 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 1e-7 - - 7.5 db 8.6 db 1e-8 - - 8 db 9 db 1e-9 - - 8.5 db 9.4 db 1e...

  • Page 32

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–28 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 1e-5 7 db 8 db 6.7 db 7.6 db 1e-6 7.4 db 8.1 db 7.1 db 7.7 db 1e-7 7.8 db 8.2 db 7.5 db 7.8 db 1e-8 8.2...

  • Page 33

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–29 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 er-d...

  • Page 34

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–30 blank page er-dmd20lbs-ea14 rev -.

  • Page 35

    Er-dmd20lbs-eb14 rev - plm c-0028800 errata b for mn-dmd20-20lbst rev 14 comtech ef data documentation update subject: chapter 3, theory of operation errata part number: er-dmd20lbs-eb14 (errata documents are not subject to revision.) plm co number: c-0028800 comments: the new information will be in...

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    Er-dmd20lbs-eb14 rev - plm c-0028800 blank page.

  • Page 37: Dmd20/dmd20Lbst

    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 comtech ef data is an as9100 rev b / iso9001:2000 registered company dmd20/dmd20lbst universal satellite modem installation and ...

  • Page 38

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  • Page 39: Table Of Contents

    Iii table of contents chapter 1. Introduction .................................................................................. 1–1 1.1 overview ................................................................................................................................ 1–1 1.2 configurations .....

  • Page 40

    Table of contentstable of contents revision 14 dmd20/dmd20lbst universal satellite modem mn-dmd20-20lbst iv 3.3.4 modem monitor status ..................................................................................................... 3–7 3.4 async port / es-es communications.........................

  • Page 41

    Table of contentstable of contents revision 14 dmd20/dmd20lbst universal satellite modem mn-dmd20-20lbst v 3.15.4 system functionality and operational considerations..................................................... 3–29 3.15.5 doubletalk carrier-in-carrier cancellation process .....................

  • Page 42

    Table of contentstable of contents revision 14 dmd20/dmd20lbst universal satellite modem mn-dmd20-20lbst vi 4.5.2 modem setup for terminal mode ................................................................................... 4–47 4.6 terminal port user interface .....................................

  • Page 43

    Table of contentstable of contents revision 14 dmd20/dmd20lbst universal satellite modem mn-dmd20-20lbst vii 5.8.3 8k data (j3) ............................................................................................................... 5–15 5.8.4 g.703 bal (j4)......................................

  • Page 44

    Table of contentstable of contents revision 14 dmd20/dmd20lbst universal satellite modem mn-dmd20-20lbst viii 6.2.2 alarm masks .................................................................................................................... 6–6 6.2.2.1 active alarms ................................

  • Page 45

    Table of contentstable of contents revision 14 dmd20/dmd20lbst universal satellite modem mn-dmd20-20lbst ix 7.19.2 dvb ................................................................................................................................ 7–7 7.20 ber specifications ...........................

  • Page 46

    Table of contentstable of contents revision 14 dmd20/dmd20lbst universal satellite modem mn-dmd20-20lbst x appendix b. Front panel upgrade procedure ......................................... B–1 b.1 introduction ...........................................................................................

  • Page 47

    Table of contentstable of contents revision 14 dmd20/dmd20lbst universal satellite modem mn-dmd20-20lbst xi f.2 setup ....................................................................................................................................... F–1 f.2.1 tcp-ip menus ..........................

  • Page 48

    Table of contentstable of contents revision 14 dmd20/dmd20lbst universal satellite modem mn-dmd20-20lbst xii h.1.2 insert only ...................................................................................................................... H–3 h.1.3 mode selection ................................

  • Page 49: Preface

    I 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 acknowled...

  • Page 50

    Dmd20/dmd20lbst universal satellite modempreface revision 14 preface mn-dmd20-20lbst ii cautions and warnings safety compliance en 60950 applicable testing is routinely performed as a condition of manufacturing on all units to ensure compliance with safety requirements of en60950.This equipment meet...

  • Page 51

    Dmd20/dmd20lbst universal satellite modempreface revision 14 preface mn-dmd20-20lbst iii 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 op...

  • Page 52

    Dmd20/dmd20lbst universal satellite modempreface revision 14 preface mn-dmd20-20lbst iv 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 • amplifiers • converters • transceivers • terminals ...

  • Page 53: Chapter 1. Introduction

    Mn-dmd20-20lbst revision 14 1–1 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, i...

  • Page 54

    Dmd20/20lbst universal satellite modem introduction mn-dmd20-20lbst revision 14 1–2 the dmd20 lbst (figure 1-2) offers additional features that are not included in the standard dmd20 modem. The features included in dmd20 lbst serves as an interface between the indoor unit (dmd20 lbst) and the outdoo...

  • Page 55

    Dmd20/20lbst universal satellite modem introduction mn-dmd20-20lbst revision 14 1–3 only authorized service personnel should handle and install optional hardware options. 1.2.4 factory installed options units may also be sent to the factory for hardware option installation. Please contact the custom...

  • Page 56

    Dmd20/20lbst universal satellite modem introduction mn-dmd20-20lbst revision 14 1–4 blank page.

  • Page 57: Chapter 2. Installation

    Mn-dmd20-20lbst revision 14 2–1 chapter 2. Installation 2.1 unpacking and inspection inspect shipping containers for damage. If shipping containers are damaged, keep them until the contents of the shipment have been carefully inspected and checked for normal operation. The universal satellite modem ...

  • Page 58

    Dmd20/20lbst universal satellite modem installation mn-dmd20-20lbst revision 14 2–2 2.2 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 ...

  • Page 59

    Dmd20/20lbst universal satellite modem installation mn-dmd20-20lbst revision 14 2–3 2.3 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...

  • Page 60

    Dmd20/20lbst universal satellite modem installation mn-dmd20-20lbst revision 14 2–4 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 o...

  • Page 61

    Dmd20/20lbst universal satellite modem installation mn-dmd20-20lbst revision 14 2–5 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 m...

  • Page 62

    Dmd20/20lbst universal satellite modem installation mn-dmd20-20lbst revision 14 2–6 2.6 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...

  • Page 63: Chapter 3. Theory Of

    Mn-dmd20-20lbst revision 14 3–1 chapter 3. Theory of operation 3.1 modem hardware the modem is based on a two printed circuit card (minimum configuration) design with additional optioned printed circuit cards available for additional features. The minimum configuration consists of an l-band/if assem...

  • Page 64

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–2 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 o...

  • Page 65

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–3 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 mod...

  • Page 66

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–4 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 ...

  • Page 67

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–5 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 appro...

  • Page 68

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–6 3.3.1 terminal port this port supports an asynchronous control protocol as described in chapter 4. It is configured to support rs-232 signal levels. This port is intended for use in computer-based remote m&c. ...

  • Page 69

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–7 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 ...

  • Page 70

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–8 3.6 loopback features (terrestrial & if) the modem provides for a number of different loopbacks. The loopback supported are: if loopback – tx if port is looped back to the rx if port tx terrestrial loopback - ...

  • Page 71

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–9 figure 3-4 loopback functional block diagram.

  • Page 72

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–10 figure 3-5 loopback functional block diagram figure 3-6 loopback functional block diagram.

  • Page 73

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–11 3.7 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 cl...

  • Page 74

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–12 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 c...

  • Page 75

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–13 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 ...

  • Page 76

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–14 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 lock...

  • Page 77

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–15 the dmd20 & 20lbst supports radyne hdlc and comtech hdlc modes, offering compatibility with the slm5650a bridge interface. 3.9 reed-solomon codec refer to figure 3-8, figure 3-9, and table 3-1. Utilizing a re...

  • Page 78

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–16 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. ...

  • Page 79

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–17 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 r...

  • Page 80

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–18 table 3-2 kbps baud rate example for standard ibs kbps baud rate example for enhanced mode 1216 19200 1280 19200 1344 19200 1408 19200 1472 19200 1536 19200 1600 19200 1664 19200 1728 19200 1792 19200 1856 19...

  • Page 81

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–19 3.12 asynchronous multiplexer mode since many of the frame bits in the standard ibs mode are not used, an “enhanced” multiplexer mode has been implemented that can be engaged under software control. Since thi...

  • Page 82

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–20 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 ...

  • Page 83

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–21 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 e...

  • Page 84

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–22 3.14.4 actual overhead rate calculation the following is the actual calculation the modem does to calculate the overhead ratio: 1. The modem calculates the minimum in-band rate to limit the size of the user d...

  • Page 85

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–23 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 de...

  • Page 86

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–24 scc overhead chart examples (viterbi 3/4 w/v.35 scrambler) modem data rate kbps scc control channel rate in-band overhead rate setting symbol rate 9.6 1/1 300 6800 9.6 1/2 300 6700 9.6 1/3 300 6667 9.6 1/4 30...

  • Page 87

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–25 3.15 doubletalk carrier-in-carrier option space segment costs are typically the most significant operating expense for any satellite-based service, having a direct impact on the viability and profitability of...

  • Page 88

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–26 • 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 ab...

  • Page 89

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–27 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 ...

  • Page 90

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–28 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 outb...

  • Page 91

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–29 3.15.4 system functionality and operational considerations figure 3-11 illustrates a conventional, full duplex satellite link where two carriers are placed in non-overlapping channels. Figure 3-11. Convention...

  • Page 92

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–30 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 because acquiring...

  • Page 93

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–31 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 mn-dmd20-20lbst revision 14 3–32 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 sign...

  • Page 95

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–33 3.15.6 margin requirements typical interfering signal cancellation is 28 to 35 db (depending on the product). The residual interfering signal appears as noise causing a slight degradation of the eb/no. To com...

  • Page 96

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–34 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 data rate 512 kbps...

  • Page 97

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–35 link parameters and lst summary for qpsk, ldpc 2/3 with carrier-in-carrier is as follows:.

  • Page 98

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–36 the link budget summary for the different modcod combinations is as follows: s. No. Modulation & fec allocated bw (mhz) peb (mhz) leased bw (mhz) savings compared to original psd ratio (db) 1 8-qam, ldpc 2/3 ...

  • Page 99

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–37 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 sp...

  • Page 100

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–38 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...

  • Page 101

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–39 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 inclu...

  • Page 102

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–40 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...

  • Page 103

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–41 3.15.11 operational references 3.15.12 carrier-in-carrier link budget calculation the following steps are required for calculating the link budget for a carrier-in-carrier link: 1. Calculate the link budget f...

  • Page 104

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–42 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 symbol rate powe...

  • Page 105

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–43 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 po...

  • Page 106

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–44 3.15.14 doubletalk carrier-in-carrier specifications operating mode requires the two links to share a common carrier frequency (outbound and inbound symbol rates do not have to be equal) power spectral densit...

  • Page 107

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–45 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 backo...

  • Page 108

    Dmd20/20lbst universal satellite modem theory of operation mn-dmd20-20lbst revision 14 3–46 co+no/no carrier density (c o ) + noise (n o ) to noise density (n o ) ratio: unit is db c/n = c/n o – 10 log b [where b is bandwidth in hz] e b /n o = c/n o – 10 log r [where r is data rate in bits/sec] = c/...

  • Page 109: Chapter 4. User Interfaces

    Mn-dmd20-20lbst revision 14 4–1 chapter 4. User interfaces 4.1 user interfaces this section contains information pertaining to the user interfaces for the modem. There are four user interfaces available for the modem. These are: • front panel interface – refer to section 4.2. • terminal interface - ...

  • Page 110

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–2 figure 4-1 dmd20 front panel figure 4-2 dmd20 lbst front panel table 4-1 item number description function 1 lcd front panel display displays operating parameters and configuration data 2 cursor control arrow keys ...

  • Page 111

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–3 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 disp...

  • Page 112

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–4 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 appropria...

  • Page 113

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–5 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. 4.4 f...

  • Page 114

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–6 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...

  • Page 115

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–7 dvb: per en301-421 & en301-210 data rates: all rates framing type: dvb scrambler type: dvb spectrum mask: dvb 0.25, 0.35 closed net: all possible combinations allowed, however, a dvb setting requires the dvb netwo...

  • Page 116

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–8 modulation {bpsk, qpsk, oqpsk, 8psk, 16qam, 8qam} allows the user to select the modulation type. Spectral mask {intelsat 0.35, dvb sat 0.35, dvb sat 0.25, dvb sat 0.20} allows the user to set the spectral shape of...

  • Page 117

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–9 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 se...

  • Page 118

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–10 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...

  • Page 119

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–11 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 am...

  • Page 120

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–12 aupc (menu) local aupc (menu) the 'local aupc configuration' menu contains the local configuration parameters for the aupc function. Aupc mode {disabled, near side, radyne, efdata} disabled: allows the user to en...

  • Page 121

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–13 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 nearside: w...

  • Page 122

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–14 aupc mode {disable,near side, efdata} allows the user to enable or disable the aupc function of the remote modem. The remote aupc function is the response of the local modem to commands for an increase or decreas...

  • Page 123

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–15 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 p...

  • Page 124

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–16 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 param...

  • Page 125

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–17 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 p...

  • Page 126

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–18 rotation ambig {n (x.X.X)}, n=0..7, x=0 or 1 (8psk only) allows the user to manually set the rotational ambiguity of the uncoded* 8psk constellation. This will force the rotation to one of the eight possible stat...

  • Page 127

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–19 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. Only available wh...

  • Page 128

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–20 hi alarm thrsh {0.00 amps} allows user to select high alarm limit/threshold for lnb current. Cnc (menu) these selections are visible only when the carrier in carrier card is installed. Enable/disable {enabled, di...

  • Page 129

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–21 any lower priority traffic. With this setting, the lower priority traffic can starve. Eth crc route {normal, bypass} determines how the modem will route a packet with a bad crc. In normal mode the modem will drop...

  • Page 130

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–22 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 channe...

  • Page 131

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–23 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. Allow...

  • Page 132

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–24 ref freq src {internal, external, high stability} allows the user to select the frequency reference source. High stability is only displayed if the appropriate hardware is detected. Ref freq (mhz) allows the user...

  • Page 133

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–25 es baudrate {150 – 1024} for ibs es to es {150 – 19200} for es to es enhanced {150 – 115200} for scc communications es to es : fixed baud rate based on ibs network specification. Available rates are listed in tab...

  • Page 134

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–26 total packets displays the total number of ethernet packets received from the satellite (only visible when ethernet is selected as the interface type). Error packets displays the number of error ethernet packets ...

  • Page 135

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–27 +12v supply displays the measured voltage of the +12 volt power bus located inside the modem. +20v supply displays the measured voltage of the +20 volt power bus located inside the modem. -12v supply displays the...

  • Page 136

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–28 4.4.6 alarms menu options and parameters masking alarms may cause undesirable modem performance. Current alarms (menu) tx major (menu) status edit table fpga cfg {pass/fail, unmasked/masked} indicates a transmit ...

  • Page 137

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–29 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...

  • Page 138

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–30 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} indi...

  • Page 139

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–31 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 under...

  • Page 140

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–32 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 n...

  • Page 141

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–33 -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 intermitten...

  • Page 142

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–34 rx major (menu) fpga cfg dsp cfg signal lock input lvl thresh frame lock multiframe lock lb synth pll if synth pll ethernet wan lnb current lnb voltage rx minor (menu) buff underflow buff near empty buff near ful...

  • Page 143

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–35 rx agc level rx level ibs ber rx dvb frm lock common (menu) terr fpga cfg codec fpga cfg codec dev cfg ext clock act ext ref act ext ref lock ethernet wan voltage (menu) +1.5v rx supply +1.5v tx supply +3.3v supp...

  • Page 144

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–36 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; bk 4; bk 1&4; bk 2&4...

  • Page 145

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–37 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 ...

  • Page 146

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–38 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 w...

  • Page 147

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–39 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 ...

  • Page 148

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–40 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 c...

  • Page 149

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–41 web 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 mo...

  • Page 150

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–42 front panel. The user can clear all characters from the front panel screen. User reset resets group and password. User 3 access group {no group, guest, oper, admin} access rights represent the following: no group...

  • Page 151

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–43 only the appropriate of the vco adjustment screens listed below will be displayed. These are protected fields, to prohibit accidental changes. To edit the field, the user must depress all four of the direction ar...

  • Page 152

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–44 cnc debug regs1 used for factory test only. Cnc debug regs2 used for factory test only. Cnc debug regs3 used for factory test only. Cnc debug regs4 used for factory test only. Scale ampltd used for factory test o...

  • Page 153

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–45 d&i aupc 8psk 16qam turbo 52 mbps om73 scrambling dvb 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 test...

  • Page 154

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–46 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 pe...

  • Page 155

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–47 4.5 terminal mode control the terminal mode control allows the use of an external terminal or computer to monitor and control the modem from a full screen interactive presentation operated by the modem itself. No...

  • Page 156

    Dmd20/20lbst universal satellite modem user interfaces mn-dmd20-20lbst revision 14 4–48 4.6 terminal port user interface the remote port (j20) of the modem allows for complete control and monitoring of all parameters and functions via an rs-232 serial interface, or rs-485 for rllp protocol. ‘termina...

  • Page 157: Chapter 5. Rear Panel

    Mn-dmd20-20lbst revision 14 5–1 chapter 5. Rear panel interfaces this section discusses the electrical interfaces available from the rear panel. All locations are as viewed from the rear of the unit unless otherwise specified. 5.1 dmd20/dmd20 lbst connections all dmd20/dmd20 lbst connections are mad...

  • Page 158

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–2 figure 5-1 dmd20 universal satellite modem rear panel configuations.

  • Page 159

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–3 figure 5-2 dmd20lbst universal satellite modem rear panel configurations.

  • Page 160

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–4 5.2 compact flash the compact flash slot is located on the right side as viewed from the rear of the unit. A 128 or 256 mbit flash memory card that stores all the modem m&c and operational data. It must be p...

  • Page 161

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–5 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

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–6 note 2: prompt alarms can be configured to support a summary of a) prompt alarms, b) prompt and tx minor alarms, or c) prompt and tx minor and tx major alarms. Note 3: service alarms can be configured to sup...

  • Page 163

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–7 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” ...

  • Page 164

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–8 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. Table 5-5. Remote port (r...

  • Page 165

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–9 5.5 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...

  • Page 166

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–10 table 5-6. Alarm port 15-pin female “d” connector (j15) pin no. Signal name signal direction 12 service – no sp2-no no direction 13 no connection sp2-nc no direction 14 agc out agc no direction 15 ground gn...

  • Page 167

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–11 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” ...

  • Page 168

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–12 5.5.9 remote (j20) the remote port is a rs-485 or rs-232 connection for remote monitor and control of the modem. It is a 9-pin female “d” connector. Refer to table 5-9 for pinouts. Table 5-9. Remote port (r...

  • Page 169

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–13 5.8 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 ...

  • Page 170

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–14 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 ta...

  • Page 171

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–15 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...

  • Page 172

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–16 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. Signal name sign...

  • Page 173

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–17 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) ...

  • Page 174

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–18 table 5-10. Switch interface port 68-pin high-density female connector (j5) pin no. Signal name signal direction 24 idr esc transmit 8 kbps output clock esctxc-a output 25 idr esc transmit 8 kbps output dat...

  • Page 175

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–19 table 5-10. Switch interface port 68-pin high-density female connector (j5) pin no. Signal name signal direction 46 idr esc backward alarm out - 4 common escbwo 4c no direction 47 external clock input - b b...

  • Page 176

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–20 5.8.6 sd (ddi) (j6) the send data (drop data in) port (unbalanced) is a 75-ohm female bnc connector. 5.8.7 ddo (j7) the drop data out port (unbalanced) is a 75-ohm female bnc connector. 5.8.8 idi (j8) the i...

  • Page 177

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–21 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 5...

  • Page 178

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–22 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...

  • Page 179

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–23 table 5-12b. J3 − m2p in - 25-pin female pin number signal name direction 1 outclk+ output 14 outclk- output 2 clk+ input 15 clk- input 3 sync+ input 16 sync- input 4 valid+ input 17 valid- input 5 d0+ inpu...

  • Page 180

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–24 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 pinou...

  • Page 181

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–25 table 5-13b. J3 - m2p out – 25-pin female ‘d’ sub connector pin number signal name direction 1 nc output 14 nc output 2 clk+ output 15 clk- output 3 sync+ output 16 sync- output 4 valid+ output 17 valid- ou...

  • Page 182

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–26 5.12 ethernet data interface (optional) the optional modem ethernet data interface provides four rj-45 10/100 base-t interface. The ethernet interface supports auto-crossover and auto-sensing. The ethernet ...

  • Page 183

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–27 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 ...

  • Page 184

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–28 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-...

  • Page 185

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–29 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

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–30 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 function...

  • Page 187

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–31 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...

  • Page 188

    Dmd20/20lbst universal satellite modem rear panel interfaces mn-dmd20-20lbst revision 14 5–32 5.16 gige interface the optional ethernet data interface provides a three port rj45 10/100/1000 base-t interface. The ethernet interface supports auto-crossover and auto-sensing. The ethernet port are refer...

  • Page 189: Troubleshooting

    Mn-dmd20-20lbst revision 14 6–1 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 w...

  • Page 190

    Dmd20/20lbst universal satellite modem maintenance and troubleshooting mn-dmd20-20lbst revision 14 6–2 symptom possible cause the modem will not acquire the incoming carrier: there is an improper receive input to modem. The receive carrier level is too low. The receive carrier frequency is outside o...

  • Page 191

    Dmd20/20lbst universal satellite modem maintenance and troubleshooting mn-dmd20-20lbst revision 14 6–3 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...

  • Page 192

    Dmd20/20lbst universal satellite modem maintenance and troubleshooting mn-dmd20-20lbst revision 14 6–4 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 nea...

  • Page 193

    Dmd20/20lbst universal satellite modem maintenance and troubleshooting mn-dmd20-20lbst revision 14 6–5 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...

  • Page 194

    Dmd20/20lbst universal satellite modem maintenance and troubleshooting mn-dmd20-20lbst revision 14 6–6 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 equipm...

  • Page 195

    Dmd20/20lbst universal satellite modem maintenance and troubleshooting mn-dmd20-20lbst revision 14 6–7 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...

  • Page 196

    Dmd20/20lbst universal satellite modem maintenance and troubleshooting mn-dmd20-20lbst revision 14 6–8 table 6-1. Ibs fault conditions and actions (includes drop and insert) fault detected on terrestrial link (across interface a) fa1 - loss of terrestrial input fa2 - loss of terrestrial signaling fa...

  • Page 197: Chapter 7. Technical

    Mn-dmd20-20lbst revision 14 7–1 chapter 7. Technical specifications 7.1 data rates refer to section 7.18. 7.2 modulator modulation bpsk, qpsk, and oqpsk (8psk, 16qam optional) if tuning range 50 to 90, 100 to 180 mhz in 1 hz steps l-band tuning range 950 to 2050 mhz in 1 hz steps impedance if, 75-oh...

  • Page 198

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–2 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, ...

  • Page 199

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–3 decoder options reed-solomon intelsat (dvb optional, custom rates optional) descrambler ccitt v.35 or ibs (others optional) acquisition range programmable ±1 khz to ± 255 khz sweep delay value 100 msec to...

  • Page 200

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–4 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) a...

  • Page 201

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–5 7.17 environmental prime power 100 to 240 vac, 50 to 60 hz, 40 watts maximum 48 vdc (optional) operating temperature 0 to 50°c, 95% humidity, non-condensing storage temperature -20 to 70°c, 99% humidity, ...

  • Page 202

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–6 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 tp...

  • Page 203

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–7 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...

  • Page 204

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–8 188 mode modulation code rate min data rate max data rate bpsk vit 1/2 2400 4607843 bpsk vit 2/3 2950 6143790 bpsk vit 3/4 3318 6911764 bpsk vit 5/6 3687 7679738 bpsk vit 7/8 3871 8063725 qpsk vit 1/2 442...

  • Page 205

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–9 7.20 ber specifications 7.20.1 ber performance (viterbi) figure 7-1 b/o/qpsk ber performance (viterbi) note: eb/no values include the effect of using differential decoding and v.35 descrambling. 1e-9 1e-8...

  • Page 206

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–10 7.20.2 ber performance (sequential) figure 7-2 b/o/qpsk ber performance (sequential) note: eb/no values include the effect of using differential decoding and v.35 descrambling. 1e-9 1e-8 1e-7 1e-6 1e-5 1...

  • Page 207

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–11 7.20.3 ber performance (viterbi with reed-solomon) figure 7-3 b/o/qpsk ber performance (viterbi w/r-s) note: eb/no values include the effect of using differential decoding. 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 ...

  • Page 208

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–12 7.20.4 ber performance ((o)qpsk turbo) figure 7-4 bpsk (o)qpsk ber performance (turbo) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 eb/no in db be r turbo decoder specificati...

  • Page 209

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–13 7.20.5 ber performance (b/o/qpsk turbo) figure 7-5 b/o/qpsk ber performance (turbo) note: eb/no values include the effect of using interleaving and maximum iterations. 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 ...

  • Page 210

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–14 7.20.6 ber performance (8psk turbo) figure 7-6 bpsk 8psk ber performance (turbo) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 eb/no in db be r turbo decoder specification tur...

  • Page 211

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–15 7.20.7 ber performance (8psk trellis) figure 7-7 8psk ber performance (trellis) note: eb/no values include the effect of using differential decoding and v.35 descrambling. 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1...

  • Page 212

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–16 7.20.8 ber performance (8psk turbo) figure 7-8 8psk ber performance (turbo) note: eb/no values include the effect of using interleaving and maximum iterations. 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-...

  • Page 213

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–17 7.20.9 ber performance (16qam viterbi) figure 7-9 16qam ber performance (viterbi) note: eb/no values include the effect of using differential decoding and v.35 descrambling. 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4...

  • Page 214

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–18 7.20.10 ber performance (16qam viterbi with reed-solomon) figure 7-10 bpsk 16qam ber performance (viterbi w/r-s) note: eb/no values include the effect of using differential decoding. 1e-9 1e-8 1e-7 1e-6 ...

  • Page 215

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–19 7.20.11 ber performance (16qam turbo) figure 7-11 bpsk 16qam ber performance (turbo) note: eb/no values include the effect of using interleaving and maximum iterations. 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3...

  • Page 216

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–20 7.20.12 ber performance (16qam turbo) figure 7-12 bpsk 16qam ber performance (turbo) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 eb/no in db be r turbo decoder spec...

  • Page 217

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–21 7.20.13 1/2 rate b/o/qpsk ber performance (ldpc) figure 7-13 – rate 1/2 b/o/qpsk ber performance (ldpc) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 be r eb/no in db 1/2 rate...

  • Page 218

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–22 7.20.14 2/3 rate q/8psk/8qam ber performance (ldpc) figure 7-14 – rate 2/3 q/8psk/8qam ber performance (ldpc) 1e-9 1e-8 1e-7 1e-6 1e-5 1e-4 1e-3 1e-2 1e-1 0 1 2 3 4 5 6 7 8 9 10 11 12 be r eb/no in db 2/...

  • Page 219

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–23 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).

  • Page 220

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–24 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 6.1 db 7.1 db 4.5 db 5.6 db 6.5 db 1e-5 5.5 db 6.8 db 7.9 db 5.1 db 6.3 db 7.2 db 1e-6 6.1...

  • Page 221

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–25 turbo 0.495 turbo 0.793 turbo 0.495 turbo 0.793 1e-3 2.5 db 3.3 db 2.2 db 3 db 1e-4 2.7 db 3.7 db 2.3 db 3.2 db 1e-5 3 db 4.1 db 2.5 db 3.4 db 1e-6 3.2 db 4.4 db 2.6 db 3.6 db 1e-7 3.5 db 4.8 db 2.7 db 3...

  • Page 222

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–26 3/4 rate 7/8 rate 3/4 rate 7/8 rate 1e-3 8.9 db 10.3 db 8.1 db 9.5 db 1e-4 9.8 db 11.1 db 9 db 10.3 db 1e-5 10.7 db 11.9 db 9.9 db 11.1 db 1e-6 11.5 db 12.7 db 10.7 db 11.9 db 1e-7 12.4 db 13.5 db 11.6 d...

  • Page 223

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–27 turbo 1/2 turbo 3/4 turbo 7/8 turbo 1/2 turbo 3/4 turbo 7/8 1e-3 tbd 3.2 db 4 db tbd 2.8 db 3.7 db 1e-4 tbd 3.4 db 4.1 db tbd 3 db 3.8 db 1e-5 2.7 db 3.6 db 4.2 db 2.4 db 3.2 db 3.9 db 1e-6 2.9 db 3.8 db...

  • Page 224

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–28 table 7-16. Open network performance ber specification typical ibs idr idr ibs ibs idr idr 1/2 rate 3/4 rate 7/8 rate 1/2 rate 3/4 rate 3/4 rate 7/8 rate 1e-3 4.1 db 5.2 db 6.2 db 3.25 db 4.2 db 4.35 db ...

  • Page 225

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–29 figure 7-16 agc voltage monitor.

  • Page 226

    Dmd20/20lbst universal satellite modem technical specifications mn-dmd20-20lbst revision 14 7–30 blank page.

  • Page 227

    Mn-dmd20-20lbst revision 14 a–1 appendix a. Product options a.1 hardware options the following enhanced interface cards are available. A.2 g.703/idr esc interface the modem can be equipped with g.703 t1/e1/t2/e2 /idr esc interface a.3 internal high stability the modem can be equipped with a 5x10 -8 ...

  • Page 228

    Dmd20/20lbst universal satellite modem product options mn-dmd20-20lbst revision 14 a–2 a.9 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 ty...

  • Page 229: Procedure

    Mn-dmd20-20lbst revision 14 b–1 appendix b. Front panel upgrade procedure b.1 introduction the universal satellite modem offers the ability to perform field upgrades of the modem’s feature set quickly and easily from the front panel. Purchased upgrades will become part of the modems permanent config...

  • Page 230

    Dmd20/20lbst universal satellite modem front panel upgrade procedure mn-dmd20-20lbst revision 14 b–2 key code req indicates that the desired option is available as a front panel upgrade. 2. Contact comtech with the unit id and desired upgrades. The modem’s unit id can be found on the front panel as ...

  • Page 231

    Dmd20/20lbst universal satellite modem front panel upgrade procedure mn-dmd20-20lbst revision 14 b–3 b.4 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...

  • Page 232

    Dmd20/20lbst universal satellite modem front panel upgrade procedure mn-dmd20-20lbst revision 14 b–4 2. Contact comtech with the unit id and request a demonstration. The modem’s unit id can be found on the front panel as follows: a. From the modem’s main menu, scroll right to the system menu. B. Scr...

  • Page 233

    Dmd20/20lbst universal satellite modem front panel upgrade procedure mn-dmd20-20lbst revision 14 b–5 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, op...

  • Page 234

    Dmd20/20lbst universal satellite modem front panel upgrade procedure mn-dmd20-20lbst revision 14 b–6 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 usi...

  • Page 235

    Mn-dmd20-20lbst revision 14 c–1 appendix c. Carrier control c.1 states the transmitter will turn off the carrier output automatically when the modem determines there is a major alarm. This is done to prevent the carrier from outputting an unknown spectrum and possibly disturbing adjacent carriers. T...

  • Page 236

    Dmd20/20lbst universal satellite modem carrier controls mn-dmd20-20lbst revision 14 c–2 c.5 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 aft...

  • Page 237: Appendix D.  Strap Codes

    Mn-dmd20-20lbst revision 14 d–1 appendix d. Strap codes d.1 strap codes the strap code is a quick set key that sets many of the modem parameters. For quick setup of the modem, strap codes are very helpful. When a strap code is entered, the modem is automatically configured for the code’s correspondi...

  • Page 238

    Dmd20/20lbst universal satellite modem strap codes mn-dmd20-20lbst revision 14 d–2 table d-1. Strap codes dis = disable s tr a p c ode (d eci m a l) d a ta r at e (k b p s) o ve rh ead co d e r a te ty pe fr a m ing ty pe s c ra mb le r t y p e d rop a nd i ns e rt r eed -s o lom on m odu la ti on m...

  • Page 239

    Dmd20/20lbst universal satellite modem strap codes mn-dmd20-20lbst revision 14 d–3 table d-1. Strap codes dis = disable s tr a p c ode (d eci m a l) d a ta r at e (k b p s) o ve rh ead co d e r a te ty pe fr a m ing ty pe s c ra mb le r t y p e d rop a nd i ns e rt r eed -s o lom on m odu la ti on m...

  • Page 240

    Dmd20/20lbst universal satellite modem strap codes mn-dmd20-20lbst revision 14 d–4 table d-1. Strap codes dis = disable s tr a p c ode (d eci m a l) d a ta r at e (k b p s) o ve rh ead co d e r a te ty pe fr a m ing ty pe s c ra mb le r t y p e d rop a nd i ns e rt r eed -s o lom on m odu la ti on m...

  • Page 241

    Dmd20/20lbst universal satellite modem strap codes mn-dmd20-20lbst revision 14 d–5 table d-1. Strap codes dis = disable s tr a p c ode (d eci m a l) d a ta r at e (k b p s) o ve rh ead co d e r a te ty pe fr a m ing ty pe s c ra mb le r t y p e d rop a nd i ns e rt r eed -s o lom on m odu la ti on m...

  • Page 242

    Dmd20/20lbst universal satellite modem strap codes mn-dmd20-20lbst revision 14 d–6 d.2.1 operational case examples 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 mo...

  • Page 243

    Dmd20/20lbst universal satellite modem strap codes mn-dmd20-20lbst revision 14 d–7 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 s...

  • Page 244

    Dmd20/20lbst universal satellite modem strap codes mn-dmd20-20lbst revision 14 d–8 demodulator: method 1 - under interface menu: set interface type set buff clock selection set buffer size set framing to 1/15: set mode to ibs: under demod if menu: set desired rx frequency under demod data menu: set ...

  • Page 245

    Dmd20/20lbst universal satellite modem strap codes mn-dmd20-20lbst revision 14 d–9 demodulator: method 1 - under interface menu: set interface type set buff clock selection set buffer size set mode to: closed net under demod if menu: set desired rx frequency under demod data menu: set code rate to 3...

  • Page 246

    Dmd20/20lbst universal satellite modem strap codes mn-dmd20-20lbst revision 14 d–10 blank page.

  • Page 247

    Mn-dmd20-20lbst revision 14 e–1 appendix e. Tcp/ip ethernet setup e.1 introduction the modem supports snmp, ftp protocols and the web browser. Utilization of the protocols is dependent upon proper set up of the tcp-ip menus. This document is to be used only as a guideline for setting up the tcp-ip m...

  • Page 248

    Dmd20/20lbst universal satellite modem tcp/ip ethernet setup mn-dmd20-20lbst revision 14 e–2 d. Ip test: the ip test selection is similar in behavior to the default selection. When enabled, the following preset parameters will be programmed and will not change until the selection is changed. To edit...

  • Page 249

    Dmd20/20lbst universal satellite modem tcp/ip ethernet setup mn-dmd20-20lbst revision 14 e–3 e.3 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 m...

  • Page 250

    Dmd20/20lbst universal satellite modem tcp/ip ethernet setup mn-dmd20-20lbst revision 14 e–4 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 ...

  • Page 251

    Dmd20/20lbst universal satellite modem tcp/ip ethernet setup mn-dmd20-20lbst revision 14 e–5 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 netw...

  • Page 252

    Dmd20/20lbst universal satellite modem tcp/ip ethernet setup mn-dmd20-20lbst revision 14 e–6 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 a...

  • Page 253

    Mn-dmd20-20lbst dmd20/20lbst universal satellite modem f–1 appendix f.Web interface setup guide f.1introduction 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...

  • Page 254

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–2 f.2.2ip 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 fro...

  • Page 255

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–3 f.3.2user account data important all entries are case-sensitive. Parameter character type maximum minimum restrictions user id ascii printable characters 13 0 none authentication password ascii printable c...

  • Page 256

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–4 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.1.1edit the user id. 1. Select the ...

  • Page 257

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–5 f.2reset a user account sometimes, it is necessary to reset a user account to the factory defaults. For example, a user account may be locked because of too many incorrect password attempts. Release the lo...

  • Page 258

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–6 f.4equipment 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 [ent...

  • Page 259

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–7 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 ...

  • Page 260

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–8 f.5web 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 p...

  • Page 261

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–9 f.6 configure web browsers for the radyne web interface f.6.1configure internet explorer 9 for the radyne web interface click the compatibility view button on the address bar. When compatibility view is ac...

  • Page 262

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–10 f.6.2.1change 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..

  • Page 263

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–11 f.6.2.2install the internet explorer tab v2 add-on the internet explorer (ie) tab v2 add-on lets you open web browser pages in internet explorer 7 mode. The link to the add-on is https://addons.Mozilla.Or...

  • Page 264

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–12 f.6.3configure chrome for the radyne web browser when you open the monitor & control window, you may see the error message “this webpage is not available”. Click the chrome address bar. Make sure the full...

  • Page 265

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–13 f.6.3.1change 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 c...

  • Page 266

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–14 f.6.3.2install 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/web...

  • Page 267

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–15 f.6.4configure safari for the radyne web browser important first, make sure to empty the browser cache. F.6.4.1empty the browser cache on the safari menu bar, click edit and then click empty cache... Clic...

  • Page 268

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–16 f.6.4.2reset 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 di...

  • Page 269

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–17 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 ma...

  • Page 270

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–18 f.6.4.4change 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

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–19 f.6.5configure 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) chang...

  • Page 272

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–20 f.6.5.1change 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...

  • Page 273

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–21 f.6.5.2change 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...

  • Page 274

    Dmd20/20lbst universal satellite modem web browser setup guide mn-dmd20-20lbst revision 14 f–22 blank page.

  • Page 275

    Mn-dmd20-20lbst revision 14 g–1 appendix g. Aupc operation g.1 automatic uplink power control (aupc operation) the modem has an optional built-in provision for automatic uplink power control, aupc. Aupc is useful when operating power levels are affected by environmental changes in the atmosphere. Au...

  • Page 276

    Dmd20/20lbst universal satellite modem aupc operation mn-dmd20-20lbst revision 14 g–2 g.1.2 ef aupc in ef aupc mode, the target e b /n o indicates the local unit wants the remote unit to maintain a power level sufficient to provide the local e b /n o value. Ef aupc can be set to operate on either or...

  • Page 277

    Dmd20/20lbst universal satellite modem aupc operation mn-dmd20-20lbst revision 14 g–3 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, efdata enables/disable...

  • Page 278

    Dmd20/20lbst universal satellite modem aupc operation mn-dmd20-20lbst revision 14 g–4 blank page.

  • Page 279

    Mn-dmd20-20lbst revision 14 h–1 appendix h. Drop and insert (d&i) h.1 drop and insert (d&i) the drop and insert (d&i) function provides an interface between a full t1 or e1 trunk whose framing is specified in ccitt g.704 and a fractional nx64 kbps satellite channel. The drop and insert functionality...

  • Page 280

    Dmd20/20lbst universal satellite modem drop and insert (d&i) mn-dmd20-20lbst revision 14 h–2 figure h-1 looped modems figure h-2 looped modems with separate d&i trunks.

  • Page 281

    Dmd20/20lbst universal satellite modem drop and insert (d&i) mn-dmd20-20lbst revision 14 h–3 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 f...

  • Page 282

    Dmd20/20lbst universal satellite modem drop and insert (d&i) mn-dmd20-20lbst revision 14 h–4 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 use...

  • Page 283

    Dmd20/20lbst universal satellite modem drop and insert (d&i) mn-dmd20-20lbst revision 14 h–5 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,...

  • Page 284

    Dmd20/20lbst universal satellite modem drop and insert (d&i) mn-dmd20-20lbst revision 14 h–6 h.1.5 drop and insert mapping the following displays under interface d&i setup (both tx and rx), are editing displays only: satch ts enter to edit any changes made in these displays are made on the screen, b...

  • Page 285

    Dmd20/20lbst universal satellite modem drop and insert (d&i) mn-dmd20-20lbst revision 14 h–7 4. Use the up or down arrow key to until the right hand portion displays “tx active”. 5. The mapping display should now look like this: map copy tx edit > tx active 6. Push to enter this command. This tells ...

  • Page 286

    Dmd20/20lbst universal satellite modem drop and insert (d&i) mn-dmd20-20lbst revision 14 h–8 h.2 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 th...

  • Page 287

    Dmd20/20lbst universal satellite modem drop and insert (d&i) mn-dmd20-20lbst revision 14 h–9 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...

  • Page 288

    Dmd20/20lbst universal satellite modem drop and insert (d&i) mn-dmd20-20lbst revision 14 h–10 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 opti...

  • Page 289

    Dmd20/20lbst universal satellite modem drop and insert (d&i) mn-dmd20-20lbst revision 14 h–11 under demodulator: set network spec. = drop & insert example 2: multidestinational remote site programming drop 512 kbps from a t1 trunk, 3/4 rate viterbi. Extract 512 kbps from a 1536 kbps carrier and inse...

  • Page 290

    Dmd20/20lbst universal satellite modem drop and insert (d&i) mn-dmd20-20lbst revision 14 h–12 figure h-8 single truck figure h-9 rx only with trunk figure h-10 rx only no trunk.

  • Page 291

    Dmd20/20lbst universal satellite modem drop and insert (d&i) mn-dmd20-20lbst revision 14 h–13 h.3 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 (s...

  • Page 292

    Dmd20/20lbst universal satellite modem drop and insert (d&i) mn-dmd20-20lbst revision 14 h–14 table h-2. D&i rom maps ro m m ap t1/e1 time slot # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 2 1 2 1...

  • Page 293

    Dmd20/20lbst universal satellite modem drop and insert (d&i) mn-dmd20-20lbst revision 14 h–15 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 t...

  • Page 294

    Dmd20/20lbst universal satellite modem drop and insert (d&i) mn-dmd20-20lbst revision 14 h–16 blank page.

  • Page 295: Insert (D&i)

    Mn-dmd20-20lbst revision 14 i–1 appendix i. Efficient drop and insert (d&i) i.1 introduction the menu structure and procedure to configure a modem for efficient drop & insert mode follow. I.2 prerequisite to be configured for efficient drop & insert, the modem must have a g.703 interface card instal...

  • Page 296

    Dmd20/20lbst universal satellite modem efficient drop & insert mn-dmd20-20lbst revision 14 i–2 i.3 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...

  • Page 297

    Dmd20/20lbst universal satellite modem efficient drop & insert mn-dmd20-20lbst revision 14 i–3 i.3.1 calculating the required satellite bandwidth in order to calculate the satellite bandwidth (i.E. The symbol rate), we must first calculate the efficient d&i rate (i.E. The data rate plus the overhead...

  • Page 298

    Dmd20/20lbst universal satellite modem efficient drop & insert mn-dmd20-20lbst revision 14 i–4 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) with e1 signaling...

  • Page 299

    Dmd20/20lbst universal satellite modem efficient drop & insert mn-dmd20-20lbst revision 14 i–5 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 ...

  • Page 300

    Dmd20/20lbst universal satellite modem efficient drop & insert mn-dmd20-20lbst revision 14 i–6 blank page.

  • Page 301: Appendix J. Ethernet Data

    Mn-dmd20-20lbst revision 14 j–1 appendix j. Ethernet data interface setup j.1 configure the modem to use the ethernet data interface (optional) when the optional 10/100 or 10/100/1000 base-t ethernet data interface card is installed, all of the ethernet related menus become available and can be used...

  • Page 302

    Dmd20/20lbst universal satellite modem ethernet data interface setup mn-dmd20-20lbst revision 14 j–2 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...

  • Page 303

    Dmd20/20lbst universal satellite modem ethernet data interface setup mn-dmd20-20lbst revision 14 j–3 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 p...

  • Page 304

    Dmd20/20lbst universal satellite modem ethernet data interface setup mn-dmd20-20lbst revision 14 j–4 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 p...

  • Page 305

    Metric conversions units of length unit millimeter centimeter inch foot yard meter kilometer mile 1 millimeter 1 0.1 0.0394 0.0033 0.0011 0.001 1 x 10 -6 6.214 x 10 -7 1 centimeter 10 1 0.3937 0.0328 0.0109 0.01 1 x 10 -5 6.214 x 10 -6 1 inch 25.4 2.54 1 0.0833 0.0278 0.0254 2.54 x 10 -5 1.578 x 10 ...

  • Page 306

    2114 west 7 th street tempe arizona 85281 usa 480 • 333 • 2200 phone 480 • 333 • 2161 fax.