Comtech EF Data SDM-100A Manuals

Manuals and User Guides for Comtech EF Data SDM-100A. We have 1 Comtech EF Data SDM-100A manual available for free PDF download: Installation And Operation Manual

Comtech EF Data SDM-100A Installation And Operation Manual

Comtech EF Data SDM-100A Installation And Operation Manual (212 pages)

Satellite modem

Brand: Comtech EF Data | Category: Modem | Size: 3.99 MB

Table of Contents

Limitations of Warranty
4
About this Manual
5
Related Documents
6
Customer Support
8
Table of Contents
11
Chapter 1. Introduction

17
- Figure 1-1. SDM-100A
  17
- Purpose and Function
  18
- Figure 1-2. SDM-100A Block Diagram
  18
- Description
  19
- Rev.
  19
  - Options
    20
  - ASYNC/AUPC Interface
    20
  - ADPCM Voice
    20
- Figure 1-3. Dimensional Drawing
  20
- Modem Specifications
  21
- Table 1-1. SDM-100A Specifications
  21
- Table 1-2. BER Performance Specification
  23
- Figure 1-4. Viterbi Bit Error Rate Performance
  24
- Figure 1-5. Sequential Bit Error Rate Performance
  25
- Figure 1-6. Typical Output Spectrum
  26
Chapter 2. Installation

27
- Unpacking
  27
- System Installation
  28
- System Requirements
  29
- Figure 2-1. Typical Rack Elevation
  30
- External Connections
  31
  - Figure 2-2. Rear Panel View
    31
  - Table 2-1. Rear Panel Connectors
    31
  - DATA I/O Interface (J8)
    32
  - Remote (J6)
    32
  - Faults (J7)
    33
  - TX if Output (CP1)
    33
  - AC Power
    34
  - AGC Test Point
    34
  - DC Power
    34
  - RX if Input (CP2)
    34
Chapter 3. Operation

35
Chapter 4. Theory of Operation

117
- Modulator
  117
  - Theory of Operation
    117
  - Figure 4-1. Modulator Block Diagram
    118
  - Figure 4-2. BPSK Ordering, Viterbi
    120
  - Specifications
    121
- Demodulator
  122
  - Theory of Operation
    122
  - Specifications
    122
  - Viterbi Decoding Theory
    123
  - Figure 4-3. Demodulator Block Diagram
    123
  - Figure 4-4. Viterbi Decoder Block Diagram
    124
  - Sequential Decoding Theory
    125
  - Figure 4-5. Sequential Decoder Block Diagram
    126
- Monitor and Control
  127
  - Non-Volatile Memory
    127
  - M&C Theory of Operation
    127
  - Remote Interface Specification
    127
  - Remote Interface Configuration
    128
  - Modem Defaults
    129
- Digital Interfaces
  130
  - Interface
    130
    
    RS-422 Interface
    130
    
    Figure 4-6. RS-422 Block Diagram
    131
    
    Table 4-1. M&C Jumper Settings (AS/4973)
    131
    
    Connector Pinouts
    133
    
    Specification
    134
  - Interface
    134
    
    V.35 Interface
    134
    
    Figure 4-7. V.35 Interface
    135
    
    Connector Pinouts
    137
    
    Specification
    138
  - RS-232-C Interface
    138
    
    Figure 4-8. RS-232-C Interface
    139
    
    Theory of Operation
    139
    
    Connector Pinouts
    141
  - Asynchronous Interface
    142
  - Terrestrial Interface Change
    142
Chapter 5. Maintenance

143
- System Checkout
  143
  - Interface Checkout
    143
  - Modulator Checkout
    144
  - Demodulator Checkout
    144
  - Figure 5-1. Typical Output Spectrum
    145
  - Figure 5-2. Typical Output Spectrum with Noise
    145
  - Figure 5-3. Typical Eye Constellations
    147
  - Test Points
    148
    
    Demodulator/M&C/Interface Test Points
    148
    
    Modulator Test Points
    149
- Fault Isolation
  150
- Figure 5-4. Fault Tree
  150
- Module Identification
  151
- Table 5-2. Efdata Part Numbers for Various Modules
  151
Appendix A. Remote Control Operation

153
- General
  153
- A.1 General
  153
- Message Structure
  154
  - Start Character
    154
    
    A.2 Message Structure
    154
    
    A.2.1 Start Character
    154
    
    A.2.2 Device Address
    154
    
    A.2.3 Command/Response
    155
    
    A.2.4 End Character
    155
    
    A.3 Configuration Commands/Responses
    156
    
    A.3.1 Modulator
    156
    
    A.3.2 Demodulator
    158
    
    A.3.3 Interface
    160
    
    A.3.4 System
    164
    
    A.3.5 Aupc
    164
    
    A.4 Status Commands/Responses
    166
    
    A.4.1 Configuration
    166
    
    A.4.2 Error Performance
    179
    
    A.5 Stored Faults
    180
Appendix B. Options

183
- B.1 AUPC Interface
  183
- Rev
  184
  - Figure B-1. ASYNC/AUPC Block Diagram
    184
  - B.1.1 Theory of Operation
    186
  - B.1.1.1 Terrestrial Data Interfaces
    186
  - B.1.1.2 ASYNC Data Interfaces
    186
  - B.1.1.3 Multiplexer Operation
    186
  - B.1.1.4 Demultiplexer Operation
    187
  - B.1.1.5 Buffer Operation
    187
  - B.1.1.6 Loop Timing Operation
    188
  - B.1.1.7 Baseband Loopback Operation
    188
  - B.1.1.8 Non-ASYNC Operation
    188
  - B.1.1.9 ASYNC Channel RS-485 2- and 4-Wire
    188
  - B.1.1.10 Valid ASYNC Baud Rates
    189
  - B.1.2 Installation Instructions
    189
  - B.1.2.1 Top Cover Removal
    190
  - B.1.2.2 Interface Mounting Bracket Removal
    190
  - B.1.2.3 EPROM Installation
    190
  - B.1.2.4 ASYNC Interface
    190
  - B.1.2.5 Installing Top Cover
    190
  - B.1.3 Front Panel Operation
    191
  - B.1.3.1 Interface Configuration
    191
  - B.1.3.2 Modulation Configuration
    192
  - B.1.3.3 Demodulation
    192
  - B.1.3.4 Utility/Interface
    192
  - B.1.3.5 Specifications
    193
  - B.1.3.6 Mechanical Specifications for Connector J1
    193
  - B.2 ADPCM Voice Interface
    194
  - B.2.1 Theory of Operation
    194
  - Figure B-2. System Interface Diagram
    194
  - Figure B-3. ADPCM Block Diagram
    195
  - B.2.1.1 Multiplexer
    196
  - B.2.1.2 Demultiplexer
    196
  - B.2.1.3 Protection Switch
    197
  - B.2.1.4 RS-422 Interface
    197
  - B.2.2 Front Panel Operation
    198
  - B.2.2.1 Interface
    198
  - B.2.2.2 Modulator Configuration
    198
  - B.2.2.3 Demodulator Configuration
    198
  - B.2.2.4 Utility/Interface
    199
  - B.2.2.5 TX Alarm Indication
    199
  - B.2.2.6 RX Alarm Indication
    199
  - B.2.2.7 DEMUX Lock
    199
  - B.2.2.8 Remote off Hook
    199
  - B.2.3 Specifications
    200
  - B.3 Reed-Solomon Codec
    201
  - B.3.1 Reed-Solomon Encoder
    201
  - Figure B-4. Reed-Solomon Codec Block Diagram
    201
  - Figure B-5. Reed-Solomon Encoder Section Block Diagram
    202
  - Figure B-6. Reed-Solomon Code Page Format
    203
  - B.3.2 Reed-Solomon Decoder
    204
  - Figure B-7. Reed-Solomon Decoder Section Block Diagram
    204
  - Glossary
    207
  - Metric Conversions
    211

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