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CDM-600 Satellite Modem Revision 7
Offset QPSK Operation MN/CDM600.IOM
8–2
The two consequences of this are:
1. Acquisition may be longer, especially at low data rates.
2. The acquisition threshold is higher than for normal QPSK, although the
demodulator will maintain lock down to its normal levels. For Firmware
Versions prior to 1.3.1, the acquisition thresholds are as follows:
7.0 dB Eb/No for Rate 1/2
5.2 dB Eb/No for Rate 3/4
4.8 dB Eb/No for Rate 7/8
4.0 dB Eb/No for Uncoded operation (No FEC)
Firmware Versions of 1.3.1, or higher, have improved these figures by
approximately 2-3 dB.
- CD 1
- New Features/Changes 4
- Addendum B 7
- Change Specifics: 8
- Collating Instructions 8
- MN/CDM600.IOM Revision 7 14
- AD-CDM600-AB7 14
- CDM-600 Satellite Modem 14
- Cable Drawings 14
- Errata A 15
- Errata B 17
- Errata C 18
- Errata D 19
- Filename: T_ERRATA 2 20
- Errata E 21
- Errata F 23
- Errata G 25
- CDM-600 29
- Preface MN/CDM600.IOM 30
- Table of Contents 31
- Figures 38
- Preface 39
- Electrical Safety 41
- Environmental 41
- Installation 42
- Warranty Policy 44
- Limitations of Warranty 44
- Exclusive Remedies 44
- Disclaimer 44
- Chapter 1. INTRODUCTION 45
- 1.1 Standard Features 46
- 1.1.1 AUPC 46
- 1.1.3 Verification 47
- 1.1.4 Data Interfaces 47
- 1.2 Major Assemblies 48
- Introduction MN/CDM600.IOM 49
- 1.3.2 FAST System Theory 50
- 1.3.3 Implementation 50
- 1.3.4 Hardware Options 51
- 1.4 Compatibility 52
- 1.5 New in this Release 53
- Chapter 2. INSTALLATION 55
- 2.2 Mounting 56
- Installation MN/CDM600.IOM 57
- MN/CDM600.IOM 2–3 57
- 2.3 Configuration 58
- 2.4 Select Internal IF Loop 58
- 2.5 Connect External Cables 58
- Chapter 3. FUNCTIONAL 59
- DESCRIPTION 59
- Chapter 4. PHYSICAL 61
- 4.3 Rear Panel 62
- 4.3.6 Audio Connector (P4A) 63
- 4.4 Dimensional Envelope 66
- Chapter 5. CONNECTOR 67
- PINOUTS 67
- 5.2 BNC Connectors 68
- 5.8 Unit Alarms (P5B) 71
- 5.11 AC Power Connector 73
- 5.12 Ground Connector 73
- Chapter 6. FRONT PANEL 75
- Figure 6-3. Menu Trees 78
- 6.2 Opening Screen 79
- 6.3 Main Menu 79
- 6.3.1 CONFIG 80
- 6.3.1.1 CONFIG: ALL 81
- 6.3.1.2 CONFIG: MODE 81
- 6.3.1.3 CONFIG: TX 82
- CONFIG: TX: TX-IF 82
- CONFIG: TX: POWER 83
- CONFIG: TX: ENCODER 84
- CONFIG: TX: MODULATION 86
- CONFIG: TX: DATA 87
- CONFIG: TX: SCRAMBLER 87
- 6.3.1.4 CONFIG: RX 88
- CONFIG: RX: RX-IF 88
- CONFIG: RX: DECODER 89
- CONFIG: RX: DEMODULATION 91
- CONFIG: RX: DATA 91
- CONFIG: RX: DESCRAMBLER 92
- CONFIG: RX: EbNo 93
- 6.3.1.5 CONFIG: CLOCKS 93
- CONFIG: CLOCKS: TX CLOCK 93
- CONFIG: CLOCKS: EXT-FREQ-REF 95
- INS-TYPE= T1-D4 CHAN/TS 96
- DRP-CH: 1 2 3 4 96
- TS: 01 02 03 04 96
- 6.3.1.7 CONFIG: EDMAC 97
- 6.3.1.8 CONFIG: MISC 97
- CONFIG: MISC: G.703 CODE 98
- CONFIG: MISC: IDR-ESC-TYPE 98
- CONFIG: MISC: WARM-UP 99
- 6.3.1.10 CONFIG: MASK 101
- CONFIG: MASK: AIS 101
- CONFIG: MASK: BUFFER SLIP 102
- CONFIG: MASK: RX-IF 102
- CONFIG: MASK: TERR-ALM 103
- 6.3.1.11 CONFIG: IMPEDANCE 103
- 6.3.1.12 CONFIG: STATISTICS 103
- 6.3.2 TEST 104
- Figure 6-4. Loopback Modes 105
- 6.3.3 INFORMATION 106
- INFO:ALL 106
- INFO: ID 106
- INFO: MODE 106
- INFO: TX 107
- INFO: RX 107
- INFO: CLOCKS 108
- INFO: EDMAC 108
- INFO: DROP TYPE 108
- INFO: INSERT TYPE 108
- INFO: REMOTE 109
- INFO: ALARMS MASK 109
- INFO: MISC 109
- 6.3.4 MONITOR 110
- MONITOR: LIVE-ALARMS 110
- Clear All: YES or NO 111
- 6.3.4.2 MONITOR: STATISTICS 112
- 6.3.4.4 MONITOR: AUPC-PARAMS 113
- 6.3.5 STORE/LOAD 113
- 6.3.6 UTILITIES 114
- 6.3.6.1 UTILITIES: SET-RTC 114
- 6.3.6.3 UTILITIES: LAMP 115
- 6.3.7 ODU 116
- 6.3.8 FAST 116
- 6.3.8.1 FAST: SET 116
- 6.3.8.2 FAST: VIEW 116
- Chapter 7. FORWARD ERROR 117
- CORRECTION OPTIONS 117
- 7.3 Sequential 118
- IMPORTANT 119
- 7.7.1 Introduction 122
- 7.7.2 LDPC versus TPC 123
- Decoding 129
- Sequential 130
- 1024 kbps 131
- 2048 kbps 132
- Viterbi with 133
- RS 220,200 133
- Outer Code 133
- 8-PSK/TCM Rate 2/3 135
- Decoding, with and 135
- Comtech Turbo Product Codec 136
- Rate 3/4 QPSK/OQPSK 136
- 8-PSK and 16-QAM 136
- Rate 7/8 QPSK/OQPSK 137
- Rate 1/2 QPSK/OQPSK 138
- Rate 0.95 QPSK/OQPSK 138
- Rate 21/44 BPSK 139
- Rate 5/16 BPSK 139
- Differential 141
- Encoding 141
- No FEC, no 141
- LDPC, BPSK, QPSK 142
- (O)QPSK, Rate 1/2 142
- LDPC Rate 2/3 143
- QPSK/OQPSK/8-PSK/ 143
- LDPC, Rate 3/4 144
- QPSK/OQPSK/ 144
- LDPC Rate 3/4 145
- 8-PSK/16-QAM 145
- Chapter 8. OFFSET QPSK 147
- OPERATION 147
- MN/CDM600.IOM 148
- Chapter 9. OPEN NETWORK 149
- OPERATIONS 149
- 9.2.2 IBS Framing 150
- 9.2.4 IBS Scrambling 150
- 9.3 Drop and Insert 150
- 9.3.2 D&I Framing 151
- 9.4 IDR 152
- DROP AND INSERT (D&I) 155
- 10.1.2 Tx Terrestrial 156
- 10.1.3 Rx Loop-Timed, RX=TX 156
- 10.1.5 External Clock 156
- 10.2 Receive Clocking 157
- 10.3 X.21 Notes 157
- Figure 10-1. Tx Clock Modes 158
- Figure 10-2. Rx Clock Modes 159
- 10.4 Drop and Insert 160
- 10.5 Frame Formats 161
- 10.6 Time Slot Selection 162
- • Insert Data Out (IDO) 163
- • Drop Data In (DDI) 163
- • Drop Data Out (DDO) 163
- • Insert Data In (IDI) 163
- BIT ERROR TEST 164
- Chapter 11. EDMAC CHANNEL 167
- 11.2 M&C Connection 168
- 11.3 Setup Summary 169
- 11.4 Drop & Insert ++ 170
- POWER CONTROL 171
- 12.2.1 Target Eb/No 172
- 12.2.2 Max Range 172
- 12.2.3 Alarm 173
- 12.2.4 Demod Unlock 173
- 12.3 Compensation Rate 173
- 12.4 Monitoring 174
- Chapter 13. ESC++ 175
- 13.3 Available Baud Rates 176
- 13.4 Configuration 176
- Chapter 14. FLASH UPGRADING 177
- Chapter 15. SUMMARY OF 179
- SPECIFICATIONS 179
- 15.2 Demodulator 181
- 15.3 Data Interfaces 184
- 15.5 Framing Summary 185
- 15.6 Data Rate Ranges 186
- 15.7 Miscellaneous 187
- 15.8 Approvals 187
- Chapter 16. REMOTE CONTROL 189
- 16.3 EIA-232 190
- 16.4 Basic Protocol 190
- 16.5 Packet Structure 191
- 16.5.1 Start Of Packet 191
- 16.5.2 Address 191
- 16.5.3 Instruction Code 192
- 16.5.5 Message Arguments 193
- 16.5.6 End Of Packet 193
- N/A 5 bytes Query only 219
- Appendix A. CABLE DRAWINGS 227
- Appendix B. Eb/No 231
- MEASUREMENT 231
- (Co+No/No )/10) 232
- Appendix C. FAST Activation 235
- Procedure 235
- C.2.3 Enter Access Codes 236
- Appendix D. ODU OPERATION 237
- MENU TREES 238
- D.2.2 ODU 239
- D.2.3 (ODU) ENABLE, 1:1 239
- (ODU,ENABLE,1:1) CSAT#2 240
- ODU Operation MN/CDM600.IOM 241
- Index MN/CDM600.IOM 254
- METRIC CONVERSIONS 257
- Units of Length 257
- Temperature Conversions 257
- Units of Weight 257
- 480 • 333 • 2200 PHONE 258
- 480 • 333 • 2161 258
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