Comtech-ef-data SDM-300A Manuale Utente Pagina 250
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SDM-300A Satellite Modem Revision 6
Forward Error Correction (Options) MN/SDM300A.IOM
9–14
10
-4
10
-3
10
-5
10
-6
BER
10
-7
10
-9
10
-8
10
-10
3.0 4.0 5.0 6.0
E
b
/N
0
(dB)
7.0 8.0 9.0 10.0 11.0
10
-2
1/2 Rate 3/4 Rate
7/8 Rate
SPECIFICATIONS
Figure 9-4. Sequential BER Data (56 kbps)
- SDM-300A 1
- Errata A 3
- Errata B 4
- Customer Support 6
- Table of Contents 7
- Preface MN/SDM300A.IOM 10
- ..........19–10 14
- Figures 16
- About this Manual 21
- Related Documents 21
- Conventions and References 21
- Cautions and Warnings 21
- Examples of 22
- Multi-Hazard 22
- Formats 22
- ELECTRICAL SAFETY 23
- Installation 24
- Warranty Policy 26
- Limitations of Warranty 26
- Exclusive Remedies 26
- Disclaimer 26
- Chapter 1. Introduction 27
- Introduction MN/SDM300A.IOM 28
- 1.1 Overview 29
- 1.1.1 Modem Functions 29
- 1.1.2 Standard Features 29
- 1.1.4 Modes of Operation 30
- 1.2 Options 32
- Optional) 33
- 1.4 Compatibility 35
- 1.5 Breakout Panels 35
- 1.5.2 UB-530 Breakout Panel 35
- 1.5.3 UB-54 Breakout Panel 36
- SS/300A-00023 Reserved 37
- 1.7 New in this Release 39
- 2.1.1 Theory of Operation 41
- 2.1.2 Remote Baud Rate 44
- 2.1.3 Remote Address 44
- • 8-PSK 45
- 2.2.1 Theory of Operation 46
- ± 1 x 10 47
- OPTIONAL 48
- 2.3.1 Theory of Operation 49
- 2.5.1 Available Interfaces 53
- 2.5.3 Closed Network 54
- 2.5.4 Open Network 54
- Chapter 3. Installation/ 57
- Upgrades 57
- 3.2 Installation 58
- Description Application 60
- Phillips Screwdriver 60
- 3.3.2 Hardware Upgrades 62
- 3.4 Reed-Solomon PCB 62
- 3.4.1 Unpacking 62
- 3.4.2 Installation 62
- 3.5.1 Unpacking 64
- 3.5.2 Installation 65
- U74 U86 67
- TURBO CODEC 67
- INSTALLED 67
- Turbo Setup 68
- DUPLEX 72
- REED-SOLOMON 72
- 3.8 Hardware Upgrades 76
- CHANGEABLE 78
- TX/IF OUTPUT 81
- TX/IF OUTP UT 81
- 4.1.10 Power Entry 93
- 4.1.10.1 AC Power Connector 93
- 4.1.10.2 48VDC Option 93
- Chapter 5. FRONT PANEL 95
- OPERATION 95
- 5.1.1 LED Indicators 96
- 5.1.2 Front Panel Keypad 97
- 5.2 Menu System 98
- 5.4 Opening Screen 101
- TX-X CODE RATE 102
- TX-IF FREQUENCY 104
- TX POWER LEVEL 105
- + 0.0 dBm 105
- SCRAMBLER 105
- CARRIER MODE 106
- DIFF. ENCODER 106
- MODEM REFERENCE 107
- RS ENCODER (CONDITIONAL) 107
- RX-X CODE RATE 108
- RX-IF FREQUENCY 110
- DIFF. DECODER 110
- RF LOOP BACK 111
- IF LOOP BACK 112
- BER THRESHOLD 113
- SWEEP CENTER 113
- SWEEP RANGE 114
- 60000 Hz 114
- REACQUISITION 114
- 0 SECONDS 114
- RS DECODER (CONDITIONAL) 115
- TX CLOCK SOURCE 116
- TX CLOCK PHASE 117
- BUFFER CLOCK 118
- RX (SATELLITE) 118
- (CONDITIONAL) 119
- BUFFER CENTER 120
- RX CLOCK PHASE 120
- B-BAND LOOP BACK 121
- INTRFC LOOP BACK 122
- (CONDITIONAL) 123
- FAULT (CONDITIONAL) 124
- PATTERN (CONDITIONAL) 125
- FORMAT (CONDITIONAL) 125
- SERVICE CHANNEL ADJUST 126
- Examples: 127
- IMPORTANT 130
- INSERT CHANNEL 131
- ASSIGNMENTS 131
- BAUD (CONDITIONAL) 132
- LENGTH (CONDITIONAL) 133
- STOP (CONDITIONAL) 134
- PARITY (CONDITIONAL) 135
- AUPC ENABLE (CONDITIONAL) 136
- NOMINAL POWER (CONDITIONAL) 137
- MINIMUM POWER (CONDITIONAL) 137
- MAXIMUM POWER (CONDITIONAL) 138
- TARGET Eb/No (CONDITIONAL) 138
- TRACKING RATE (CONDITIONAL) 139
- REMOTE CL ACTION 140
- CONFIGURATION 141
- AGGREGATE DATA RATE 143
- (OPTIONAL/CONDITIONAL) 143
- RX CHAN #4 PHASE 149
- FUNCTION SELECT 150
- MONITOR 150
- RAW BER 150
- 2.4 E-3 150
- CORRECTED BER 151
- 4.0 E-3 151
- 16.0 dB 151
- FRAME ERRORS 153
- 2047 errors 153
- FAULTS/ALARMS 154
- MODULATOR 155
- 155
- DEMODULATOR 155
- + 155
- TX INTERFACE 156
- ---+ 156
- RX INTERFACE 157
- 158
- BACKWARD ALARMS 158
- STORED FLTS/ALMS 159
- RX INTERFACE X 161
- STORED TIME/DATE 161
- COMMON X 161
- REMOTE AUPC 163
- ENABLE (CONDITIONAL) 164
- LOOP BACK (CONDITIONAL) 165
- PATTERN 165
- 2047 ERRORS 166
- (CONDITIONAL) 168
- ASSIGN TRANSMIT FILTERS 169
- MOD POWER OFFSET 170
- + 0.0 dB 170
- ENCODER TYPE (CONDITIONAL) 171
- FILTERS 174
- TYPE (CONDITIONAL) 176
- CONTROL (CONDITIONAL) 183
- YEAR DISPLAY 188
- 2 - DIGIT 188
- TEST MODE STATUS 188
- _ _ _ _ _ _ _ _ 188
- MONTH:DAY:YEAR 189
- DEMO MODE 192
- MASTER RESET 192
- HARD/SOFT 192
- CODE RATE/DATA RATE 193
- G.703 OPERATION 194
- UNBALANCED 194
- MODEM EMULATION 195
- DISABLED 195
- REV EMULATION 195
- CURRENT_VERSION 195
- MODEM OPTIONS 196
- CARD #1 OPTIONS 198
- CARD #2 OPTIONS 198
- CONFIGURATION CODE - MODEM 201
- to execute the change 202
- UTILITY 203
- FACTORY SET-UP 203
- 5.5 Custom Modem Defaults 204
- Chapter 6. Modem Type 209
- 6.1.1 IDR Operation 210
- 6.1.2 IBS Operation 211
- 6.1.3 D&I Operation 212
- 6.1.4 ASYNC/AUPC Operation 213
- 6.1.6 Custom Operation 215
- 8-PSK 5/6 218
- Chapter 7. Clocking Options 221
- RECOVERY 225
- • Blocking diagram 227
- • Transmit clock options 227
- • Buffer clock options 227
- RX CLOCK = INSERT 228
- Chapter 8. Buffering 229
- Figure 8-1. Clock Slip 230
- Figure 8-2. Doppler Shift 231
- 8.2 Buffer Size 232
- 8.3 Doppler 232
- 8.4 Plesiochronous 233
- Revision 6 234
- Buffering SDM300A.IOM 234
- Chapter 9. Forward Error 237
- Correction (Options) 237
- 9.2 Viterbi 238
- 9.3 Sequential 239
- 9.4.1 Closed Network Modes 241
- 9.4.2 Open Network Modes 241
- 9.6.1 Introduction 243
- 3/4 Rate 247
- 1/2 Rate 247
- 7/8 Rate 247
- Specification 247
- 1/2 Rate 3/4 Rate 250
- SPECIFICATIONS 250
- 1/2 Rate 3/4 Rate 7/8 Rate 251
- 1/1 Rate 255
- Eb/No (dB) 256
- Chapter 10. Open Network 257
- Operations 257
- 10.2.1 IBS Specifications 260
- 10.2.2 IBS Modem Defaults 261
- 10.2.5 IBS Framing 262
- 10.2.7 IBS Scrambling 262
- 10.3.1 IDR Specifications 266
- 0 dB V.35 Scrambler ON 267
- 10.3. 4 IDR Framing 268
- 10–14 270
- TRANSMIT SECTION 272
- RECEIVE SECTION 272
- Figure 10-4. D&I 273
- 10.4.2 Theory of Operation 274
- 10.4.3 Data Interference 274
- 10.4.4 Transmitted MUX 274
- 10.4.5 Receive DEMUX 275
- 10.4.6 Plesiochronous Buffer 275
- 10.4.8 Backward Alarm 276
- 10–22 278
- 10.4.12 D&I Framing 280
- 10.5 G.703 281
- 10.5.1 G.703 Specifications 281
- 10–26 282
- Chapter 11. Asynchronous 283
- Interface/AUPC 283
- . ASYNC/AUPC Block Diagram 285
- 11.2 AUPC 286
- TX and RX Reed-Solomon 287
- 11.2.1.1 Remote AUPC 288
- 11.3 ASYNC 289
- 11.3.3 MUX Operation 290
- 11.3.4 DEMUX Operation 290
- 11.3.5 Buffer Operation 290
- 11.3.8 Non-ASYNC Operation 292
- ASYNC REMOTE OPERATION 294
- LOCAL END REMOTE END 295
- EIA-485 [4-Wire]) 300
- [2-Wire]) 301
- [4-Wire]) 304
- Timing 307
- Chapter 13. Duplex-Reed 313
- Solomon Card Option 313
- Chapter 14. 8-Channel 315
- Multiplexer 315
- 14.2 Installation 316
- Chapter 15. Flex Mux 321
- Flex Mux MN/SDM300A.IOM 322
- 15.2 Installation 326
- Chapter 16. FAST Accessible 329
- Options 329
- 16.3 FAST System Theory 331
- 16.4 Implementation 331
- 16.4.1 Activation Procedure 331
- 16.4.1.2 Select Features: 332
- 16.4.1.5 Verify Upgrade 334
- 16.5 Variable Data Rates 334
- Chapter 17. FLASH Upgrading 335
- Chapter 18. Troubleshooting 337
- 18.2 Interface Checkout 338
- 18.2.1 Modulator Checkout 339
- 18.2.2 Demodulator Checkout 342
- WITH NOISE 343
- WITHOUT NOISE 343
- 18.3 Fault Isolation 344
- 18.3.1 System Faults/Alarms 344
- 18.3.2 Faults/Alarms Display 348
- 18.3.3.1 Modulator Faults 349
- 18.3.3.2 Demodulator Faults 350
- Chapter 19. Specifications 357
- 19.4.1 Digital Data Rate 361
- 19.4.3 Scrambling Types 364
- 19.4.4 Differential Encoder 364
- 19.4.5 BPSK Bit Ordering 364
- Capacitively coupled 365
- Dual sideband 367
- 19.5.1 Digital Data Rate 368
- 19.5.3 Descrambling Types 371
- 19.5.4 Differential Decoder 371
- 19.5.5 BPSK Bit Ordering 371
- (Optional) 375
- (Optional) 375
- Reed-Solomon (Optional) 376
- 19.6.11 BER Threshold 378
- 19.7 Acquisition Time 379
- 19.7.3 AGC Output 380
- 19.8.1 Transmit Clock Source 380
- 19.8.2.13 Buffer Centering 383
- 19.8.2.14 Switch Faults 383
- 19.9.1 Universal 383
- 19.9.2 EIA-232 Specification 384
- 19.10 System Specifications 388
- 19.10.1 Loopback Modes 388
- 19.10.2 Test Modes 388
- 19.10.3 Remote Control 389
- 19.10.4 Modem Remote Address 389
- 19.10.5 Monitored Signals 389
- 19.11 Dimenionsal Envelope 391
- Appendix A. Remote Control 393
- Operation 393
- A.2.1 Start Character 394
- A.2.2 Device Address 394
- A.4 End Character 395
- Command: 397
- (MPO_) 397
- Modulator Output Power 420
- AUPC Local Power Enable 421
- A.15 Modem Fault Status 430
- Error Performance Status 433
- A.16 Stored Faults 437
- A.20 Miscellaneous Status 456
- Glossary 461
- Glossary MN/SDM300A.IOM 464
- (Optional), 10-4 467
- QPSK, 19-21 467
- METRIC CONVERSIONS 469
- Units of Length 469
- Temperature Conversions 469
- Units of Weight 469
- 480 • 333 • 2200 PHONE 470
- 480 • 333 • 2161 470
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