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CDM-840 Remote Router Revision 0
Forward Error Correction MN-CDM840
6–12
Figure 6-9. VersaFEC Codec – 16-QAM, Rate 0.731, 0.780, 0.829 and 0.853
1E-9
1E-8
1E-7
1E-6
1E-5
1E-4
1E-3
1E-2
1E-1
1 2 3 4 5 6 7 8 9 10 11 12
Eb/No in dB
Rate
0.780
16-QAM
Uncoded BPSK/QPSK
Typical Performance shown -
guaranteed performance curves
are 0.3dB to the right
Rate
0.731
16-QAM
1 2 3 4 5 6 7 8 9 10 11 12
BER
Comtech VersaFEC® Codec
Rate 0.731, 0.780, 0.829
and 0.853 16-QAM
Uncoded 16-QAM
Rate
0.829
16-QAM
Rate
0.853
16-QAM
- Remote Router 1
- Errata A 3
- CDM-840 5
- Table of Contents 7
- Table of Contents MN-CDM840 10
- Figures 11
- PREFACE 13
- Preface MN-CDM840 14
- Low Voltage Directive (LVD) 15
- Installation 15
- Environmental 15
- CE Mark 16
- RoHS Compliance 16
- Warranty Policy 17
- Limitations of Warranty 17
- Exclusive Remedies 18
- Customer Support 19
- Online Customer Support 19
- Chapter 1. INTRODUCTION 21
- 1.2 Functional Description 22
- Introduction MN-CDM840 23
- 1.3.3 Dimensional Envelope 25
- 1.3.4 Physical Features 26
- 1.3.4.1 Front Panel 26
- 1.3.4.2 Rear Panel 27
- 1.3.5 Data Interfaces 27
- 1.3.6 Verification 27
- FAST System Theory 28
- FAST Implementation 28
- FAST Accessible Options 28
- Hz range,100 Hz resolution 30
- 1.4.2 Regulatory Compliance 31
- Chapter 2. INSTALLATION 33
- 2.2 Mounting 34
- Installation MN-CDM840 35
- Chapter 3. REAR PANEL 37
- CONNECTOR 37
- PINOUTS 37
- 3.2 IF Connections 38
- 3.2.1 Rx IF Connector 38
- 3.2.2 Tx IF Connector 38
- 3.4 Utility Connections 40
- Chapter 4. FLASH UPGRADING 43
- Flash Upgrading MN-CDM840 44
- Chapter 5. ETHERNET 47
- MANAGEMENT 47
- 5.3 SNMP Interface 48
- 5.4.2 User Login 49
- 5.4.3 Web Server Menu Tree 50
- IMPORTANT 51
- 5.4.4.2 Home Pages 52
- 5.4.4.2.1 Home 52
- 5.4.4.2.2 Home 53
- 5.4.4.3 Admin Pages 54
- 5.4.4.3.1 Admin 54
- 5.4.4.3.2 Admin 55
- 5.4.4.3.3 Admin 56
- 5.4.4.3.4 Admin 57
- 5.4.4.4 Configuration Pages 58
- GE Interface 60
- Demodulator 61
- Modulator 63
- Add Static ARP 65
- Delete Static ARP 65
- Flush Dynamic ARPs 65
- ARP Table (Edit) 65
- Route Table (Edit) 67
- Add New Route 67
- Delete Route 67
- Receive WAN Labels 68
- , Max/Priority, or 71
- QoS Rules Table 72
- Add New QoS Rule 72
- Delete Rule 73
- LNB Control 75
- 5.4.4.5 Status pages 76
- Ethernet Statistics 77
- Mod Statistics 77
- Demod Statistics 77
- Clear Statistics 78
- Clear QoS Counters 80
- QoS Statistics 80
- System Monitor 81
- 5.4.4.6 Utility pages 82
- Save/Load Configuration 83
- (FUTURE) Redundancy 83
- BERT Config 83
- BERT Monitor 84
- System Reboot 84
- Chapter 6. FORWARD ERROR 85
- CORRECTION 85
- 6.2.1 Range of Data Rates 86
- 6.3 VersaFEC 86
- (Short-block LDPC) 86
- 6.3.1 Range of Data Rates 88
- Comtech VersaFEC® Codec 93
- Rate 0.488 BPSK 93
- Rate 0.533, 0.631, 0.706 94
- Rate 0.642, 0.711, 0.780 95
- Rate 0.731, 0.780, 0.829 96
- Appendix A. FAST ACTIVATION 97
- PROCEDURE 97
- A.2.2 Record Serial Number 98
- Appendix A MN-CDM840 100
- Appendix B. REMOTE CONTROL 101
- B.4 Packet Structure 102
- B.4.1 Start of Packet 102
- B.4.2 Target Address 103
- B.4.3 Address Delimiter 103
- B.4.4 Instruction Code 103
- B.4.7 End of Packet 104
- Appendix B MN-CDM840 105
- B–5 105
- B–6 106
- B–7 107
- B–8 108
- METRIC CONVERSIONS 109
- Units of Length 109
- Temperature Conversions 109
- Units of Weight 109
- 480 • 333 • 2200 PHONE 110
- • 333 • 2161 FAX 110
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