Comtech EF Data SDM-300L3 User manual

IMPORTANT NOTE: The information contained in this document supersedes all previously
published information regarding this product. Product specifications are subject to change
without prior notice.
Part Number MN/SDM300L3.IOM Revision 1
SD
M
-
300L
3
Satellite Modem
Installation and O
p
eration Manual

Copyright © Comtech EF Data, 2000. All rights reserved. Printed in the USA.
Comtech EF Data, 2114 West 7th Street, Tempe, Arizona 85281 USA, 480.333.2200, FAX: [phone].
SDM-300L3
Satellite Modem
Installation and Operation Manual
Part Number MN/SDM300L3.IOM
Revision 1
July 25, 2004
Comtech EF Data is an ISO 9001
Registered Company.

ii
Customer Support
Contact the Comtech EF Data Customer Support Department for:
• Product support or training
• Information on upgrading or returning a product
• Reporting comments or suggestions concerning manuals
A Customer Support representative may be reached at:
Comtech EF Data
Attention: Customer Support Department
2114 West 7th Street
Tempe, Arizona 85281 USA
480.333.2200 (Main Comtech EF Data Number)
480.333.4357 (Customer Support Desk)
480.333.2161 FAX
or, E-Mail can be sent to the Customer Support Department at:
[email protected]
Contact us via the web at www.comtechefdata.com.
1. To return a Comtech EF Data product (in-warranty and out-of-warranty) for
repair or replacement:
2. Request a Return Material Authorization (RMA) number from the Comtech EF
Data Customer Support Department.
3. Be prepared to supply the Customer Support representative with the model
number, serial number, and a description of the problem.
4. To ensure that the product is not damaged during shipping, pack the product in
its original shipping carton/packaging.
5. Ship the product back to Comtech EF Data. (Shipping charges should be
prepaid.)
For more information regarding the warranty policies, see, p. xviii.

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Table of Contents
CHAPTER 1. INTRODUCTION............................................................................................. 1–1
1.1 Overview....................................................................................................................... 1–3
1.2 Options Summary........................................................................................................ 1–3
1.3 Comtech EF Data Part Numbers ................................................................................ 1–4
1.4 FAST Accessible Options........................................................................................... 1–5
1.5 Compatibility................................................................................................................ 1–6
1.6 Description of the Modulator...................................................................................... 1–6
1.6.1 Overview................................................................................................................................1–6
1.6.2 Description.............................................................................................................................1–6
1.6.3 Description of Modulation Types ...........................................................................................1–7
1.6.4 BPSK Encoding .....................................................................................................................1–8
1.6.5 QPSK Encoding.....................................................................................................................1–8
1.6.6 OQPSK Encoding..................................................................................................................1–9
1.6.7 8-PSK Encoding ....................................................................................................................1–9
1.7 Description of the Demodulator............................................................................... 1–10
1.7.1 Overview..............................................................................................................................1–10
1.7.2 Functional Description .........................................................................................................1–11
1.8 Description of Monitor & Control............................................................................. 1–12
1.8.1 Overview..............................................................................................................................1–12
1.8.2 Functional Description .........................................................................................................1–13
1.9 Dimensional Envelope .............................................................................................. 1–15

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CHAPTER 2. INSTALLATION/ UPGRADES ....................................................................... 2–1
2.1 Unpacking .................................................................................................................... 2–1
2.2 Installation.................................................................................................................... 2–2
2.3 Software and Hardware Installation/Upgrades ......................................................... 2–4
2.3.1 Overhead Interface PCB Installation .....................................................................................2–4
2.3.2 Reed-Solomon PCB ..............................................................................................................2–6
2.3.3 Turbo Codec Installation........................................................................................................2–8
2.4 Data I/O Interface Connector (J8) Removal/Installation......................................... 2–11
2.5 Hardware Upgrades................................................................................................... 2–14
2.5.1 Main PCB Firmware Chips .................................................................................................2–14
2.5.2 Overhead Interface PCB Firmware Chips ..........................................................................2–14
2.6 Flash Upgrading ........................................................................................................ 2–16
CHAPTER 3. CONNECTOR PINOUTS ................................................................................ 3–1
3.1 Connector Overview.................................................................................................... 3–1
3.2 Connector Description................................................................................................ 3–3
3.2.1 Remote Connector and Pinouts (J6) .....................................................................................3–3
3.2.2 Fault Connector and Pinouts (J7)..........................................................................................3–4
3.2.3 Data I/O Interface Connector (J8) .........................................................................................3–5
3.2.4 G.703 T1, E1/ASYNC Interface Adapter .............................................................................3–11
3.2.5 Auxiliary 1 Connector and Pinouts (J9) ...............................................................................3–12
3.2.6 Alarms Connector and Pinouts (J10) ..................................................................................3–13
3.2.7 RF Output Connector (CP1) ................................................................................................3–13
3.2.8 External Reference (CP2) ...................................................................................................3–13
3.2.9 RF Input Connector (CP3)...................................................................................................3–13
3.2.10 AC Power Connector...........................................................................................................3–14
3.2.11 Ground Connector (GND)....................................................................................................3–14
CHAPTER 4. FRONT PANEL OPERATION ....................................................................... 4–1
4.1 Front Panel................................................................................................................... 4–1
4.2 LED Indicators ............................................................................................................. 4–2
4.3 Front Panel Keypad..................................................................................................... 4–3
4.4 Menu System ............................................................................................................... 4–4
4.5 Menu Tree..................................................................................................................... 4–6

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4.6 Opening Screen ........................................................................................................... 4–7
4.6.1 FUNCTION SELECT: CONFIGURATION.............................................................................4–7
4.6.2 FUNCTION SELECT: MONITOR........................................................................................4–61
4.6.3 FUNCTION SELECT: FAULTS/ALARMS ...........................................................................4–68
4.6.4 FUNCTION SELECT: STORED FLTS/ALMS .....................................................................4–74
4.6.5 FUNCTION SELECT: REMOTE AUPC (Conditional).........................................................4–79
4.6.6 FUNCTION SELECT: UTILITY............................................................................................4–83
4.7 SDM-300L Custom Modem Defaults ...................................................................... 4–129
CHAPTER 5. MODEM TYPE ............................................................................................... 5–1
5.1 Modem Type................................................................................................................. 5–1
5.2 IDR Operation ............................................................................................................. 5–2
5.3 IBS Operation............................................................................................................... 5–3
5.3.1 309 IBS Operation .................................................................................................................5–3
5.3.2 VSAT IBS Operation..............................................................................................................5–3
5.4 D&I Operation .............................................................................................................. 5–4
5.5 ASYNC/AUPC Operation............................................................................................. 5–5
5.6 Closed Network Operation (Comtech EF Data) ........................................................ 5–6
5.7 Custom Operation ....................................................................................................... 5–8
5.8 Reed-Solomon Modes................................................................................................. 5–9
CHAPTER 6. CLOCKING AND RX BUFFERING SETTINGS ............................................ 6–1
6.1 Clocking Options......................................................................................................... 6–1
6.1.1 EIA-232, EIA-422, or V.35 Master/Master.............................................................................6–1
6.1.2 EIA-232, EIA-422, or V.35 Master/Slave...............................................................................6–1
6.2 IDR/IBS G.703 Master/Master ..................................................................................... 6–2
6.2.1 IDR/IBS G.703 Master/Slave.................................................................................................6–2
6.2.2 D&I G.703 Master/Master......................................................................................................6–3
6.3 Buffering....................................................................................................................... 6–9
6.4 Doppler ....................................................................................................................... 6–12
6.5 Plesiochronous.......................................................................................................... 6–13
6.6 ASymmetrical Loop Timing ...................................................................................... 6–14

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6.7 Frame/Multiframe Length.......................................................................................... 6–17
6.7.1 Multiples of the Frame Length.............................................................................................6–17
6.7.2 Total Buffer Length ..............................................................................................................6–17
6.7.3 Converting Between Bits and Seconds ...............................................................................6–17
CHAPTER 7. FEC AND TURBO .......................................................................................... 7–1
7.1 Introduction.................................................................................................................. 7–1
7.2 Coding .......................................................................................................................... 7–2
7.3 Turbo Product Codec (Hardware Option) ................................................................. 7–2
7.3.1 Introduction ............................................................................................................................7–2
7.3.2 Mod/Demod Processing Delay..............................................................................................7–3
7.3.3 Comparison of all TPC Modes...............................................................................................7–4
7.4 Uncoded Operation (No FEC)..................................................................................... 7–5
CHAPTER 8. SYSTEM CHECKOUT .................................................................................... 8–1
8.1 System Checkout ........................................................................................................ 8–1
8.1.1 Interface Checkout ................................................................................................................8–2
8.1.2 Modulator Checkout ..............................................................................................................8–3
8.1.3 Demodulator Checkout..........................................................................................................8–5
CHAPTER 9. FAULT ISOLATION........................................................................................ 9–1
9.1 Fault Isolation .............................................................................................................. 9–1
9.1.1 System Faults/Alarms............................................................................................................9–2
9.1.2 Faults/Alarms Display............................................................................................................9–2
9.1.3 Faults/Alarms Analysis ..........................................................................................................9–2
CHAPTER 10. OPEN NETWORK OPERATIONS............................................................. 10–1
10.1 Introduction................................................................................................................ 10–1
10.2 IBS............................................................................................................................... 10–1
10.3 IDR .............................................................................................................................. 10–5
10.4 Drop & Insert (D&I) .................................................................................................... 10–9
10.4.1 Description of D&I Operation.............................................................................................10–11
10.4.2 D&I Framing Formats ........................................................................................................10–14
10.4.3 D&I Modem Defaults .........................................................................................................10–17
10.5 2xADPCM Voice in 64 kbps IBS ............................................................................. 10–18

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CHAPTER 11. ASYNCHRONOUS INTERFACE/AUPC ...................................................... 11–1
11.1 Asynchronous Interface/AUPC ................................................................................ 11–1
11.2 AUPC .......................................................................................................................... 11–4
11.2.1 AUPC – Between Two Modems..........................................................................................11–5
11.2.2 Self-Monitoring Local Modem AUPC Control ......................................................................11–6
11.3 ASYNC ........................................................................................................................ 11–7
11.3.1 Terrestrial Data Interfaces ...................................................................................................11–7
11.3.2 ASYNC Data Interfaces.......................................................................................................11–7
11.3.3 MUX Operation....................................................................................................................11–8
11.3.4 DEMUX Operation...............................................................................................................11–8
11.3.5 Buffer Operation ..................................................................................................................11–8
11.3.6 Loop Timing Operation ........................................................................................................11–9
11.3.7 Baseband Loopback Operation...........................................................................................11–9
11.3.8 Non-ASYNC Operation......................................................................................................11–10
11.4 ASYNC Channel EIA-485 2- and 4-Wire Operation ............................................... 11–10
11.4.1 Valid ASYNC Baud Rates .................................................................................................11–11
11.4.2 Front Panel Operation .......................................................................................................11–11
11.4.3 ASYNC Remote Operation................................................................................................11–12
11.4.4 ASYNC/AUPC Modem Defaults........................................................................................11–24
CHAPTER 12. G.703 ............................................................................................................ 12–1
CHAPTER 13. FULLY ACCESSIBLE SYSTEM TOPOLOGY (FAST)................................ 13–1
CHAPTER 14. SPECIFICATIONS..................................................................................... 14–1
14.1 Specifications ............................................................................................................ 14–1
14.2 Specification Summary............................................................................................. 14–3
14.3 L-Band Modulator Specification Summary ............................................................. 14–4
14.4 Demodulator Specification Summary...................................................................... 14–5

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14.5 L-Band Modulator Specifications ............................................................................ 14–6
14.5.1 Digital Data Rate .................................................................................................................14–6
14.5.2 Modulation and Encoding Types .........................................................................................14–8
14.5.3 Scrambling Types................................................................................................................14–9
14.5.4 Modulator Frequency Reference.........................................................................................14–9
14.5.5 Modulator Spurious Emissions..........................................................................................14–10
14.5.6 Modulator Phase Noise .....................................................................................................14–10
14.5.7 Modulator IF Output Spectrum Shape...............................................................................14–10
14.5.8 L-Band INMARSAT Spurious Emissions...........................................................................14–10
14.5.9 Differential Encoder ...........................................................................................................14–11
14.5.10 BPSK Bit Ordering.........................................................................................................14–11
14.5.11 Interleaver (Reed-Solomon Codec)...............................................................................14–11
14.5.12 Modulator Transmit Frequency (IF)...............................................................................14–11
14.5.13 Transmit Frequency Change Time................................................................................14–11
14.5.14 Modulator Transmit IF Output Switch............................................................................14–11
14.5.15 Modulator Transmit IF Power ........................................................................................14–11
14.5.16 Modulator Power Offset.................................................................................................14–12
14.5.17 Modulator I / Q Imbalance .............................................................................................14–12
14.5.18 Modulator Output Noise Floor .......................................................................................14–12
14.5.19 Modulator Spectrum Rotation........................................................................................14–12
14.5.20 Modulator Output Return Loss ......................................................................................14–12
14.5.21 L-Band ODU Reference Signal .....................................................................................14–12
14.5.22 L-Band ODU Control and Monitor .................................................................................14–12
14.5.23 Modulator Transmit IF Test Modes................................................................................14–12
14.5.24 L-Band ODU Supply Voltage.........................................................................................14–13
14.5.25 ODU DC Current Sense ................................................................................................14–13
14.6 Encoding .................................................................................................................. 14–13
14.6.1 BPSK Encoding .................................................................................................................14–13
14.6.2 OQPSK Encoding..............................................................................................................14–14
14.6.3 8PSK Encoding .................................................................................................................14–14
14.7 L-Band Demodulator Specifications...................................................................... 14–15
14.7.1 Digital Data Rate ...............................................................................................................14–15
14.7.2 Demodulation and FEC Decoding Types ..........................................................................14–17
14.7.3 Descrambling Types..........................................................................................................14–18
14.7.4 Differential Decoder...........................................................................................................14–18
14.7.5 BPSK Bit Ordering.............................................................................................................14–18
14.7.6 Deinterleaver (Reed-Solomon Codec) ..............................................................................14–18
14.7.7 Demodulator Spectrum Rotation .......................................................................................14–19
14.7.8 Receive Frequency............................................................................................................14–19
14.7.9 Input Overload ...................................................................................................................14–19
14.7.10 Demodulator Input Return Loss.....................................................................................14–19
14.7.11 LNB Prime Power ..........................................................................................................14–19
14.7.12 LNB Band Control..........................................................................................................14–19
14.7.13 LNB Reference Signal ...................................................................................................14–19
14.7.14 Receive Input Power (Composite).................................................................................14–20
14.7.15 Demodulator Input Shape..............................................................................................14–20
14.7.16 Receive Input Power (Desired Carrier) .........................................................................14–21
14.7.17 Demodulator Channel Spacing/Adjacent Carrier Performance.....................................14–21