Comtech EF Data SDM-650B Especificações Página 247
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SDM-300L3 Satellite Modem Revision 0
Forward Error Correction Options MN/SDM300L3.IOM
7–7
Figure 7-1. Viterbi Decoder
BPSK/OQPSK Viterbi Decoding
1.0E-09
1.0E-08
1.0E-07
1.0E-06
1.0E-05
1.0E-04
1.0E-03
1.0E-02
2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0
Eb/No (dB)
BER
Specification Limit
8PSK Rate 2/3 Coding
Specification Limit
Rate 7/8 Coding
Specification Limit
Rate 3/4 Coding
Specification Limit
Rate 1/2 Coding
- Satellite Modem 1
- Installation and O 1
- Errata A 3
- Filename: T_ERRATA 2 4
- Errata B 5
- Errata C 7
- Change Specifics: 8
- Errata D 9
- Errata E 11
- Dual: dual sideband 12
- Errata F 13
- 3.2.10 AC Power Connector 14
- Errata G 15
- Errata H 17
- Errata J 19
- Errata K 21
- Errata L 23
- Errata M 25
- Errata N 27
- SDM-300L3 29
- Customer Support 30
- Table of Contents 31
- Preface MN/SDM300L3.IOM 32
- Figures 39
- About this Manual 42
- Related Documents 42
- Conventions and References 42
- Cautions and Warnings 42
- Metric Conversion 43
- Trademarks 43
- ELECTRICAL SAFETY 44
- Installation 45
- Warranty Policy 47
- Limitations of Warranty 47
- Exclusive Remedies 47
- Disclaimer 47
- Chapter 1. INTRODUCTION 49
- SDM-300L Satellite Modem 50
- 1.1 Overview 51
- 1.2 Options Summary 51
- 1.5 Compatibility 54
- 1.6.1 Overview 54
- 1.6.2 Description 54
- 1.6.4 BPSK Encoding 56
- 1.6.5 QPSK Encoding 56
- 1.6.6 OQPSK Encoding 57
- 1.6.7 8PSK Encoding 57
- 1.7.1 Overview 58
- 1.8.1 Overview 60
- . M&C Block Diagram 61
- 1.9 Dimensional Envelope 63
- 2.0 INSTALLATION/ 65
- UPGRADES 65
- 2.2 Installation 66
- 2.3.1.1 Installation 68
- Overhead 69
- 2.3.2 Reed-Solomon PCB 70
- 2.3.2.1 Unpacking 70
- 2.3.2.2 Installation 70
- Reed-Solomon 71
- Cards (TX or RX in 71
- Either Slot) 71
- 2.3.3.1 Unpacking 72
- 2.3.3.2 Installation 72
- 2.4.1 G.703/ASYNC Module 76
- 2.5 Hardware Upgrades 78
- 2.6 Flash Upgrading 80
- Chapter 3. CONNECTOR PINOUTS 83
- J2 J3 J4 J5 84
- Chapter 4. FRONT PANEL 97
- 4.2 LED Indicators 98
- 4.3 Front Panel Keypad 99
- 4.4 Menu System 100
- 4.4.5 REVISION EMULATION 101
- 4.5 Menu Tree 102
- SDM-300L3 CUSTOM 103
- VER: X.X.X 103
- FUNCTIONAL SELECT 103
- CONFIGURATION 103
- TX-X CODE/DATA RATE 104
- TX-IF FREQUENCY 106
- 1200.0000 MHz 106
- TX TERMINAL FREQUENCY 106
- 5845.0000 MHz 106
- ↑] and [↓] with 107
- SCRAMBLER 108
- DIFF. ENCODER 108
- CARRIER MODE 109
- MODEM REFERENCE 109
- ODU OUTPUT DELAY 111
- ODU 10 MHZ REF 111
- RS ENCODER (CONDITIONAL) 112
- RX-X CODE/DATA RATE 112
- IMPORTANT 114
- DESCRAMBLER 115
- DIFF. DECODER 115
- RF LOOP BACK 116
- IF LOOP BACK 117
- RS DECODER 121
- TX CLOCK SOURCE 122
- TX CLOCK PHASE 123
- EXT-CLK FREQ 123
- BUFFER CLOCK 124
- RX CLOCK PHASE 124
- B-BAND LOOP BACK 125
- INTRFC LOOP BACK 126
- BUFFER SIZE (CONDITIONAL) 127
- PCB is installed 128
- RX DATA FAULT 129
- TX 2047 PATTERN 129
- RX 2047 PATTERN 130
- TX CODING FORMAT 130
- DROP FORMAT 133
- INSERT FORMAT 134
- Card is installed 135
- Overhead Card is installed 136
- (CONDITIONAL) 141
- TRACKING RATE (CONDITIONAL) 144
- REMOTE CL ACTION 145
- ↑] or [↓]. Press 146
- (OPTIONAL) (CONDITIONAL) 151
- (CONDITIONAL) 154
- TX INTERFACE 156
- 156
- RX INTERFACE 157
- OUTDOOR UNIT 159
- FUNCTION SELECT 160
- STORED FLTS/ALMS 160
- AUPC ENABLE (CONDITIONAL) 166
- 2047 ERRORS 168
- ASSIGN TRANSMIT FILTERS 170
- TX TERMINAL LO 172
- 0 MHz MIX: 172
- MOD POWER OFFSET 173
- MODULATOR TYPE 173
- SCRAMBLER TYPE 174
- ODU ALARM - LOW 176
- ODU ALARM - HIGH 177
- RF MODE CONTROL 177
- ASSIGN RECEIVE FILTERS 179
- RX TERMINAL LO 180
- RX TERMINAL LO 181
- O MHz MIX: 181
- TX OVERHEAD TYPE 186
- RX OVERHEAD TYPE 186
- IDR BACKWARD 191
- ALARM CONTROL 191
- MASTER RESET 203
- HARD/SOFT 203
- UTILITY 204
- MODEM TYPE 204
- MODEM TYPE 204
- MODEM OPTIONS 205
- CARD #1 TYPE 206
- OVERHEAD 01 206
- CARD #2 TYPE 206
- REED SOLOMON 03 206
- CARD #3 TYPE 207
- REED SOLOMON 02 207
- CARD #1 OPTIONS 207
- CARD #2 OPTIONS 208
- CARD #3 OPTIONS 208
- LOCAL MODEM AUPC 209
- MODEM SERIAL # 209
- 012345678 209
- Chapter 5. MODEM TYPE 217
- 5.2 IDR Operation 218
- 5.3 IBS Operation 219
- 5.3.1 309 IBS Operation 219
- 5.3.2 VSAT IBS Operation 219
- 5.4 D&I Operation 220
- 5.5 ASYNC/AUPC Operation 221
- Modem Types MN/SDM300L3.IOM 222
- 5.7 Custom Operation 224
- 5.8 Reed-Solomon Modes 225
- Chapter 6. CLOCKING AND RX 227
- BUFFERING SETTINGS 227
- Figure 6-1 230
- RECOVERY 232
- RX CLOCK = INSERT 234
- 6.3 Buffering 235
- FIGURE 6-6. CLOCK SLIP 236
- FIGURE 6-7. DOPPLER SHIFT 237
- 6.3.1 Buffer Size 238
- 6.4 Doppler 238
- 6.5 Plesiochronous 239
- 6.6 Frame/Multiframe Length 240
- 6.6.2 Total Buffer Length 240
- CHAPTER 7. FEC AND TURBO 241
- 7.2 Coding 242
- 7.3.1 Introduction 242
- Figure 7-1. Viterbi Decoder 247
- Eb/No (dB) 248
- UNCODED 1:1 BPSK OQPSK 249
- Chapter 8. SYSTEM CHECKOUT 255
- 8.1.1 Interface Checkout 256
- 8.1.2 Modulator Checkout 257
- WITH NOISE 260
- WITHOUT NOISE 260
- Chapter 9. FAULT ISOLATION 261
- 9.1.1 System Faults/Alarms 262
- 9.1.3.1 Faults Tree 263
- 9.1.3.2 Modulator Faults 266
- 9.1.3.3 Demodulator Faults 267
- 9.1.3.4 Outdoor Unit 268
- Chapter 10. OPEN NETWORK 271
- OPERATIONS 271
- 10.2.1 IBS Modem Defaults 274
- 10.3 IDR 275
- 0 dB V.35 Scrambler ON 278
- 10.4.1.1 Data Interface 281
- 10.4.1.2 Transmit MUX 281
- 10.4.1.3 Receive DEMUX 282
- 10.4.1.6 Backward Alarm 283
- follows: 284
- . D&I Modem Faults 287
- Chapter 11. ASYNCHRONOUS 289
- INTERFACE/AUPC 289
- . ASYNC/AUPC Block Diagram 291
- 11.2 AUPC 292
- TX and RX Reed-Solomon 293
- 11.2.1.1 Remote AUPC 294
- 11.3 ASYNC 295
- 11.3.3 MUX Operation 296
- 11.3.4 DEMUX Operation 296
- 11.3.5 Buffer Operation 296
- 11.3.8 Non-ASYNC Operation 298
- ASYNC REMOTE OPERATION 300
- LOCAL END REMOTE END 301
- EIA-485 [4-Wire]) 306
- [2-Wire]) 307
- [4-Wire]) 310
- CHAPTER 12. ASYMMETRICAL 313
- LOOP TIMING 313
- Chapter 13. G.703 317
- G.703 MN/SDM300L3.IOM 318
- CHAPTER 14. FULLY 319
- ACCESSIBLE SYSTEM 319
- TOPOLOGY (FAST) 319
- Select Features: 320
- Options MN/SDM300L3.IOM 321
- Verify Upgrade 322
- CHAPTER 15 . SPECIFICATIONS 323
- Figure 15-1. Block Diagram 324
- 15.2 Specification Summary 325
- 15.5.1 Digital Data Rate 328
- Capacitively coupled 331
- -63.0 100 Hz 332
- -73.0 1 kHz 332
- -83.0 10 kHz 332
- -93.0 100 kHz 332
- ≤ -25 dBc and carrier 334
- 15.6 Encoding 335
- 15.6.1 BPSK Encoding 335
- 15.6.1 QPSK Encoding 335
- 15.6.2 OQPSK Encoding 336
- 15.6.3 8PSK Encoding 336
- 15.7.1 Digital Data Rate 337
- 15.7.3 Descrambling Types 340
- 15.7.5 BPSK Bit Ordering 340
- 300L_levels.xls 343
- (Optional) 344
- Reed Solomon(Optional) 345
- (Optional) 346
- 15.8.8 BER Threshold 346
- 15.9 Acquisition Time 347
- 15.9.3 AGC Output 348
- 15.10.13 Switch Faults 351
- 15.11 Decoding 351
- 15.11.1 BPSK Decoding 351
- 15.11.2 QPSK Decoding 351
- 15.11.4 8PSK Decoding 352
- 15.13.5 Turbo AUPC 358
- 15.14.3 IBS Framing 358
- 15.14.5 IBS Scrambling 359
- 15.15.2 D&I Framing 360
- 15.16.2 IDR Framing 361
- 15.17 System Specifications 362
- 15.17.1 Loopback Modes 362
- 15.17.2 Test Modes 362
- 15.17.3 Remote Control 363
- 15.17.5 Monitored Signals 363
- 15.18 Stored Faults 364
- 15.19 Stored Configurations 364
- 15.20 Interoperability Modes 364
- Chapter 16. BUC FSK 365
- COMMUNICATIONS 365
- 16.2 Message Structure 366
- 16.3 Power Class 367
- Appendix A. REMOTE CONTROL 369
- OPERATION 369
- A.2 Message Structure 370
- A.2.1 Start Character 370
- A.2.2 Device Address 370
- A.2.3 Command/Response 371
- A.2.4 End Character 372
- Command: 373
- (MPO_) 374
- Modulator Output Power 385
- AUPC Local Power Enable 386
- A.4.4 Fault Status 392
- A.4.5 Error Performance 393
- A.5 Stored Faults 396
- Glossary 413
- Glossary MN/SDM300L3.IOM 416
- Coding, 7-2 417
- Modulator:MOD Spectrum, 4-79 420
- Collating Instructions 424
- Appendix B. Burst Mode 425
- Modulator Operation 425
- B.2.1 Digital Data Rate 426
- Capacitively coupled 427
- B.2.8 Phase Noise 428
- B.2.10 Transmit IF Power 428
- B.2.13 Spurious Emissions 429
- B.2.17 Transmit Preamble 430
- B.2.18 Transmit Packet 430
- B.2.19 Transmit Postamble 430
- METRIC CONVERSIONS 433
- Units of Length 433
- Temperature Conversions 433
- Units of Weight 433
- 480 • 333 • 2200 PHONE 434
- 480 • 333 • 2161 434
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