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Comtech EF Data SDM-9000 manual available for free PDF download: Installation And Operation Manual
Comtech EF Data SDM-9000 Installation And Operation Manual (256 pages)
Brand:
Comtech EF Data
| Category:
Modem
| Size: 3.83 MB
Table of Contents
Installation and Operation Manual
9
Customer Support
10
Table of Contents
11
About this Manual
19
Related Documents
19
Limitations of Warranty
22
Chapter 1. Introduction
23
Figure 1-1. SDM-9000
23
Overview
24
Nyquist Filter Printed Circuit Boards
25
Description
26
Figure 1-2. Modular Construction
26
Figure 1-3. SDM-9000 Block Diagram
27
Options
28
Reed-Solomon Codec
28
8Psk/16Qam
28
Direct Broadcast Satellite
29
Modem Assemblies
30
Modem Specifications
32
Table 1-1. SDM-9000 Specifications
32
BER Performance Specifications
34
Viterbi Decoder BER (QPSK)
34
Table 1-2. Viterbi Decoder BER Data
34
Figure 1-4. Viterbi BER Performance Curves (QPSK)
35
Reed-Solomon Codec BER (QPSK)
36
Table 1-3. Reed-Solomon BER Data
36
Figure 1-5. Reed-Solomon BER Performance Curves (QPSK)
37
8PSK and 16QAM (Viterbi Decoder and Reed-Solomon Codec)
38
Table 1-4. 8PSK and 16QAM BER Data
38
Figure 1-6. 8PSK BER Performance Curves (with Reed-Solomon)
39
Figure 1-7. 16QAM BER Performance Curves (with Reed-Solomon)
40
Figure 1-8. SDM-9000 Typical Spectral Occupancy
41
Chapter 2. Installation
43
Unpacking
43
System Options
44
System Installation
45
Figure 2-1. SDM-9000 Dimensional Drawing
46
External Connectors
47
Figure 2-2. SDM-9000 Rear Panel View
47
Table 2-1. Modem Rear Panel Connectors
47
External Clock (CP5)
48
Receive Data (CP3)
48
RX/IF Input (CP2)
48
Send Data (CP4)
48
TX/IF Output (CP1)
48
Remote (J6)
49
Fault (J7)
50
DATA I/O (ESC) Interface (J8)
51
G.703 (IDR) Interface (J8) (Audio Mode)
52
IDR) Interface (J8) (Audio Mode)
52
IDR) Interface (J8) (64 Kbit/S Mode)
53
ECL Interface (J8)
54
MIL-STD-188 Interface (J8)
55
Aux 1 (J9)
56
Alarms (J10)
57
AC Power
58
DC Power
58
Ground (GND)
58
Chapter 3. Configuration
59
Display/M&C
59
Figure 3-1. Display/M&C PCB
60
Table 3-1. Display/M&C PCB Jumper Settings
60
Modulator
61
Figure 3-2. Modulator PCB (AS/3969)
61
Table 3-2. Modulator PCB Jumper Settings
61
Demodulator
62
Figure 3-3. Demodulator PCB (AS/3970)
62
Table 3-3. Demodulator PCB Jumper Settings
62
Interface
63
Table 3-4. Interface Configuration Jumper Settings
63
Figure 3-4. Interface PCB (AS/3971)
64
Figure 3-5. Interface PCB (AS/4477)
65
Figure 3-6. Interface PCB (AS/5618)
66
Nyquist Filter Configuration
67
Compatibility
68
Installation
68
Unpacking Instructions
68
Tools Required
69
Installation Procedure
69
Nyquist Filter Removal
69
Figure 3-7. Nyquist Filter Installation
70
Nyquist Filter Replacement
71
Software Configuration
72
Revision Emulation
72
Table 3-5. SDM-9000 Revision Emulation
72
Remote Interface Specification
73
Remote Baud Rate
73
Remote Address
73
Modem Defaults
74
Table 3-6. Modem Defaults
74
Chapter 4. Operation
75
Front Panel
75
Figure 4-1. SDM-9000 Front Panel View
75
LED Indicators
76
Front Panel Controls
77
Menu System
78
Figure 4-2. Main Menu
78
Configuration
79
Figure 4-3. Configuration Modulator Menu
80
Configuration Modulator
81
Figure 4-4. Configuration Demodulator Menu
84
Configuration Demodulator
85
Figure 4-5. Configuration Interface Menu
88
Configuration Interface
89
Configuration Save
93
Figure 4-6. Configuration Save Menu
93
Configuration Recall
94
Figure 4-7. Configuration Recall Menu
94
Figure 4-8. Monitor Menu
95
Monitor
96
Figure 4-9. Faults/Alarm Menu
97
Faults/Alarms
98
Modulator Faults
99
Demodulator Faults
100
TX Interface Faults
101
RX Interface Faults
102
Backward Alarms
103
Common Equipment Faults
103
Figure 4-10. Stored Faults/Alarms Menu
105
Stored Faults/Alarms
106
Utility
108
Figure 4-11. Utility Modulator Menu
109
Utility Modulator
110
Figure 4-12. Utility Demodulator Menu
111
Utility Demodulator
112
Figure 4-13. Utility Interface Menu
113
Figure 4-13. Utility Interface Menu Continued
114
Utility Interface
115
Figure 4-14. Utility System Menu
117
Utility System
118
Figure 4-15. Utility Modem Type Menu
121
Utility Modem Type
122
Figure 4-16. Utility Factory Setup Menu
123
Utility Factory Setup
123
Figure 4-17. RF Loopback
124
Figure 4-18. if Loopback
124
Figure 4-19. Baseband Loopback
125
Figure 4-20. Interface Loopback
125
Clocking Options
126
Interface Clocking
126
TX Timing
126
RX Timing
126
RX Timing (with Buffer)
126
RX Timing (Without Buffer)
126
ECL/MIL-STD-188 Interface Clocking
127
TX Timing
127
RX Timing
127
RX Timing (with Buffer)
127
RX Timing (Without Buffer)
127
Figure 4-21. G.703 Interface Clocking Diagram
128
Figure 4-22. ECL/MIL-STD-188 Interface Clocking Diagram
128
Chapter 5. Theory of Operation
129
Display/M&C
129
Description
129
Theory of Operation
130
Figure 5-1. Display/M&C Block Diagram
130
Modulator
132
Description
132
Figure 5-2. Modulator Baseband Section Block Diagram
132
Figure 5-3. Modulator RF Section Block Diagram
133
Specifications
134
Theory of Operation
135
Theory of Modulation Types
137
Description
137
QPSK Encoding/Modulation
137
8PSK Encoding/Modulation
138
16QAM Encoding/Modulation
138
Demodulator
139
Description
139
Specifications
139
Figure 5-4. Demodulator Block Diagram
140
Theory of Operation
141
Viterbi Decoder
144
Description
144
Specifications
144
Figure 5-5. Viterbi Decoder Block Diagram
144
Theory of Operation
145
Interface
146
Description
146
Digital Interface Specifications
147
G.703
148
Ecl
148
Mil-Std-188
148
Theory of Operation
149
Figure 5-6. Interface Block Diagram
150
Transmit Data Path
151
Receive Data Path
152
Loopbacks
154
Baseband Loopback
154
Figure 5-7. Baseband Loopback Block Diagram
154
Interface Loopback
155
Engineering Service Channel (ESC)
155
Figure 5-8. Interface Loopback Block Diagram
155
Backward Alarm Theory and Connections
156
Chapter 6. Maintenance
159
System Checkout
159
Interface
159
Figure 6-1. Fault Isolation Test Setup
160
Modulator
161
Figure 6-2. Typical Output Spectrum (with Noise)
162
Figure 6-3. Typical Output Spectrum (Without Noise)
162
Demodulator
166
Figure 6-4. Typical Eye Constellations
167
Test Points
168
Interface PCB
168
Figure 6-5. Interface PCB Test Points
168
Modulator PCB
169
Figure 6-6. Modulator PCB Test Points
169
Demodulator PCB
170
Figure 6-7. Demodulator PCB Test Points
170
Fault Isolation
171
Guidelines
171
System Faults/Alarms
172
Table 6-4. SDM-9000 Modem Fault Tree
173
Fault/Alarm Display and Description
176
Fault/Alarm Analysis
177
Modulator Faults
177
Demodulator Faults
178
TX Interface Faults
180
RX Interface Faults
181
Common Equipment Faults
183
Backward Alarms
184
Module Replacement
185
Module Identification
185
Repacking for Shipment
185
Appendix A. Options
187
Reed-Solomon Codec
187
Figure A-1. Reed-Solomon Codec Block Diagram
187
Specifications
188
Theory of Operation
188
A.1.1 Specifications
188
Figure A-2. Reed-Solomon Encoder Section Block Diagram
188
Reed-Solomon Encoder
188
Figure A-3. Reed-Solomon Codec Frame Format
190
Figure A-4. Reed-Solomon Decoder Section Block Diagram
191
Reed-Solomon Decoder
191
Installation
193
A.1.3 Installation
193
Tools Required
193
Unpacking Instructions
193
A.1.3.3 Installation Procedure
194
Installation Procedure
194
Figure A-5. Reed-Solomon Installation
195
Direct Broadcast Satellite
196
Requirements
197
Figure A-6. Block Diagram of SDM-9000 Configured for DBS/DVB Operation
197
A.2.1 Requirements
197
Baseband Physical Interfaces
198
ECL Physical Interface
198
Figure A-7. Typical Differential ECL Receiver and Driver
198
PECL Physical Interface
199
Figure A-8. Typical Differential PECL Receiver and Driver
199
Table A-1. Electrical Characteristics of ECL and PECL Interface Types
199
DBS Baseband Interface
200
DBS RX Baseband Interface
200
DBS TX Baseband Interface
200
Figure A-9. DBS Mode Baseband Packet
200
Baseband Interface Requirements
201
Figure A-10. Timing for Transmit Baseband Interface
201
Timing for Transmit Baseband Interface
201
Table A-2. TX Baseband Interface Timing
201
DBS Mode TX SYNC Pulse Timing
202
Timing for Receive Baseband Interface
202
Figure A-11. DBS Mode TX SYNC Pulse Timing
202
Figure A-12. Timing for Receive Baseband Interface
202
DBS Mode Receive SYNC Pulse Timing
203
Figure A-13. DBS Mode Receive SYNC Pulse Timing
203
Figure A-14. DBS Mode Receive with Extended SYNC
203
Table A-3. Receive Baseband Interface Timing
203
SYNC Decoder (Correlater
204
DBS Mode SYNC Decoder for 204-Byte Packets
204
RX Functions of the DBS Mode SYNC Decoder
204
TX Functions of the DBS Mode SYNC Decoder
204
SYNC 1 Inversion and Scrambler/Descrambler
205
Figure A-15. Scrambler/Descrambler
205
DBS Mode (De)Scrambler for 204-Byte Packets
206
Figure A-16. DBS Scrambler Sequence
206
Reed-Solomon Coder/Decoder
207
Figure A-17. Reed-Solomon RS(204,188,8) Error-Protected Packet
207
DBS Mode Check Byte Framing for 204-Byte Packets
208
Depth 12 Interleaver/De-Interleaver
209
Figure A-18. Interleaver/De-Interleaver
209
Figure A-19. Interleaved Frame Structure
210
Inner Coder/Decoder
211
Figure A-20. DVB Puncturing
211
Punctured Operation
211
Table A-4. Rate Exchange Ratios for DVB Puncturing
212
Signal Space Mapping
213
Figure A-21. QPSK Constellation
213
Nyquist Filters
214
A.2.10 Nyquist Filters
214
DVB with Reed-Solomon BER (QPSK
215
Table A-5. Reed-Solomon BER Data
215
Figure A-22. QPSK (1/2, 3/4, 7/8 Rates) with Reed-Solomon (DVB
216
ESC 64 Kbit/S Data Option
217
Appendix B. Remote Control Operation
219
General
219
B.1 General
219
Message Structure
220
Start Character
220
Device Address
220
B.2 Message Structure
220
Command/Responses
221
End Character
221
B.2.3 Command/Responses
221
Configuration Commands/Responses
222
Modulator
222
Demodulator
223
B.3.2 Demodulator
223
Interface
224
B.3.3 Interface
224
System
227
B.3.4 System
227
Status Commands/Responses
228
Configuration
228
Error Performance
233
B.4.2 Error Performance
233
Stored Faults
237
B.5 Stored Faults
237
Glossary
249
Metric Conversions
255
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