Comtech EF Data CDM-Qx Spezifikationen Seite 23
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Chapter 1. INTRODUCTION
1.1 Introduction
The CDM-Qx, Multi-Channel Satellite Modem with DoubleTalk™ Carrier-in-Carrier® is
a 70/140 MHz (or CDM-QxL with 950MHz-1950MHz L Band operation) modular multi-
channel modem with redundancy contained in a single rack unit (1RU) chassis. The
Modem offers flexibility, redundancy, integration, and performance with four slots
configurable as modulators or demodulators.
The CDM-Qx/QxL supports DoubleTalk Carrier-in-Carrier® option, allowing transmit
(Tx) and receive (Rx) carriers in a full-duplex link to use the same transponder segment.
Figure 1-1. CDM-Qx/QxL
- CD 1
- Errata A 3
- Errata B 5
- Errata C 7
- Errata D 9
- Carrier-in-Carrier 11
- CUSTOMER SUPPORT 12
- Table of Contents 13
- Preface MN/CDMQx.IOM 14
- About this Manual 17
- CONVENTIONS AND REFERENCES 17
- ELECTRICAL SAFETY 18
- INSTALLATION 19
- CE MARK 20
- TRADEMARKS 20
- WARRANTY POLICY 21
- Chapter 1. INTRODUCTION 23
- 1.2 Features 24
- 1.2.3 Verification 25
- 1.2.4 Data Interfaces 26
- 1.2.5 Turbo Product Coding 26
- 1.2.6 Remote Control 26
- 1.3 Major Assemblies 27
- 1.4.2 FAST System Theory 29
- 1.4.3 Implementation 29
- 1.4.4 Hardware Options 29
- Introduction MN/CDMQx.IOM 30
- 1.5 L-Band 31
- 1.6 Compatibility 31
- Chapter 2. INSTALLATION 33
- 2.2 Mounting 34
- Installation MN/CDMQx.IOM 35
- 2.3 Configuration 36
- 2.4 Select Internal IF Loop 36
- 2.5 Connect External Cables 36
- Chapter 3. FUNCTIONAL 37
- DESCRIPTION 37
- Chapter 4. EXTERNAL 41
- CONNECTIONS 41
- 4.2 Front Panel 42
- 4.3 Rear Panel 43
- 4.4 Chassis Connections 47
- 4.4.1 USB Port 47
- 4.4.3 485/232 Connector 47
- 4.4.4 Alarms Connector 48
- 4.5 AC Power Connector 52
- 4.6 DC Power Connector 52
- 4.7 Ground Connector 53
- Chapter 5. FRONT PANEL 55
- 5.2 Left-Hand Display Area 58
- 5.2.1 Modems 58
- 5.2.2 Redundancy 59
- 5.2.3 Spectrum Analyzer 60
- 5.5 Opening Screen 62
- 5.6 TOP LEVEL SELECTION 62
- 5.6.1 CONFIG 63
- (ConfigRemoteSerial) 64
- Address 65
- (ConfigRemoteEthernet) 65
- (ConfigRemoteEthernetMAC) 66
- On/Off Pwr 69
- Tx IF Freq: 1156.3456 MHz 72
- (◄ ►,▲ ▼, ENT) 72
- Rx:FEC Demod Code Data Freq 78
- Tx Roll-off: 20% 35% 78
- Rx Rs (n/k): (◄ ►, ENT) 79
- Rx FEC: Vit Vit+RS TCM+RS 79
- Sym:02500.000ksps 81
- STarrow 86
- +/-015 (▲ ▼ ENT) 86
- CnC SEARCH IS UNRESOLVED! 86
- (ConfigGroupModem) 87
- (ConfigGroupRedundancy) 88
- EDMAC or EDMAC-2 90
- AUPC+EDMAC MODE 90
- T1 Line Length: 94
- 000-133 feet (▲ ▼ 94
- G.703 E1 Line Code: 94
- 5.6.1.8 (ConfigMask) - MASK 96
- (ConfigODUBUCLO) - BUC LO 103
- (ConfigODULNB) LNB 104
- (ConfigODULNBLO) LO 106
- (ConfigODULNBMix) MIX 106
- 5.6.2 MONITOR 107
- Rx Traffic: AGC Alarm 108
- Tx Traffic: No Tx Clock 108
- UF=+11.7k RSL= 109
- UF=+11.7k Buf=50% RSL= 109
- Log 023: 30/11/02 10:37:32 110
- Log 024: 30/11/97 10:37:35 110
- Link Statistics: View 111
- Sta198: 02/11/02 10:37:32 111
- (for grouped as modem only) 113
- 5.6.3 TEST: 115
- IF LOOPBACK 119
- LOOPBACK 119
- I/O LOOPBACK 119
- 5.6.4 INFO (Information) 120
- 5.6.5 SAVE/LOAD 124
- 5.6.6 UTILITY 127
- IMPORTANT 129
- Chapter 6. FORWARD ERROR 133
- CORRECTION OPTIONS 133
- 6.2 Viterbi 134
- 6.3.1 Closed Network Modes 136
- 6.4 Trellis Coding 137
- 6.5.1 Introduction 138
- Decoding 142
- Viterbi with 143
- RS 220,200 143
- Outer Code 143
- 8-PSK/TCM Rate 2/3 144
- Decoding, with and 144
- Rate 3/4 QPSK, 8-PSK 145
- Comtech Turbo Product Codec 145
- Spec limit 146
- Rate 7/8 146
- Rate 21/44 BPSK 148
- Rate 5/16 BPSK 148
- Chapter 7. EDMAC CHANNEL 151
- 7.2 M&C Connection 152
- 7.3 Setup Summary 153
- EDMAC Channel MN/CDMQx.IOM 154
- Chapter 8. AUTOMATIC UPLINK 155
- POWER CONTROL 155
- 8.2.1 Target Eb/No 156
- 8.2.2 Max Range 156
- 8.2.3 Alarm 157
- 8.2.4 Demod Unlock 157
- 8.3 Compensation Rate 157
- 8.4 Monitoring 158
- Chapter 9. DoubleTalk™ 159
- OPERATION 159
- Chapter 10. REDUNDANCY 163
- Redundancy MN/CDMQx.IOM 164
- Chapter 11. ETHERNET 165
- MANAGEMENT 165
- 11.3.1 Web Server Menu Tree 167
- 11.4 SNMP Interface 172
- 11.4.3 SNMP Traps 173
- 11.5 Telnet Interface 174
- Appendix A. SUMMARY OF 179
- SPECIFICATIONS 179
- Comtech EF Data 180
- CDM-Qx Transmit 180
- Power Spectral Density 180
- A.2 Demodulator 181
- A.3 Data Interfaces 183
- A.5 Data Rate Ranges 184
- A.6 Framing Summary (Future) 185
- A.7 Miscellaneous 185
- Appendix B. FLASH UPGRADING 187
- Appendix C. REMOTE CONTROL 191
- C.2 RS-232 192
- C.3 Basic Protocol 192
- C.4 Packet Structure 193
- C.4.1 Start Of Packet 193
- C.4.5 Message Arguments 197
- C.4.6 End Of Packet 197
- C.5 Remote Commands 197
- C.5.1 TX Remote Commands 199
- C.5.2 RX Remote Commands 203
- C.5.4 Query Commands 220
- 7 bytes 221
- N/A 6 bytes Query only 227
- N/A 6 bytes Query Only 228
- C.5.5 Bulk Commands 230
- C.5.6 BUC Commands 232
- C.5.7 LNB Commands 235
- PERFORMANCE 243
- CHARACTERIZATION 243
- 16-QAM 3/4 Turbo 246
- QPSK 17/18 Turbo 249
- QPSK 3/4 Turbo 249
- QPSK 21/44 Turbo 249
- QPSK 7/8 Turbo 249
- D.5 Symbol Rate Ratio 250
- D.6 CnC Carrier Offset 250
- Carrier(s) 251
- Site A Site B 252
- D.10 Conclusion 256
- Metric Conversions 257
- 480 • 333 • 2200 PHONE 258
- 480 • 333 • 258
- 2161 FAX 258
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