Comtech EF Data CDM-750 Installation And Operation Manual page 11

CDM-750 Advanced High-Speed Trunking Modem
Table of Contents
8.4.1 DoubleTalk Carrier-in-Carrier Cancellation Process ......................................................................... 8-8
8.4.2 Margin Requirements ........................................................................................................................... 8-9
8.4.3 Carrier-in-Carrier Latency .................................................................................................................... 8-9
8.4.4 Carrier-in-Carrier and Adaptive Coding and Modulation (ACM) .................................................... 8-9
8.4.5 Carrier-in-Carrier Link Design .......................................................................................................... 8-10
8.4.6 Symmetric Data Rate Link ................................................................................................................. 8-10
8.4.6.1 Asymmetric Data Rate Link ........................................................................................... 8-12
8.4.6.2 Power Limited Links ....................................................................................................... 8-13
8.4.7 Carrier-in-Carrier Commissioning and Deployment ........................................................................ 8-14
8.5 Operational References ............................................................................................................ 8-15
8.5.1 Carrier-in-Carrier Link Budget Calculation ...................................................................................... 8-15
8.5.2 Estimating / Calculating CnC Ratio .................................................................................................. 8-16
8.5.2.1 Estimating CnC Ratio from LST / EIRP ......................................................................... 8-16
8.5.2.2 Calculating CnC Ratio from Carrier to Noise Ratio (C/N) on a Spectrum Analyzer ..... 8-17
8.5.2.3 Calculating CnC Ratio and PSD Ratio from Satmaster .................................................. 8-18
8.6 DoubleTalk Carrier-in-Carrier Specifications ....................................................................... 8-18
8.7 Carrier-in-Carrier Summary ................................................................................................... 8-18
8.8 Glossary ..................................................................................................................................... 8-19
CHAPTER 9. ETHERNET NETWORK CONFIGURATION ................................................... 9-1
9.1 Introduction ................................................................................................................................. 9-1
9.2 Ethernet Routers and Switches .................................................................................................. 9-1
9.3 Ethernet Configuration Examples ............................................................................................. 9-2
9.3.1 Ethernet Network Overview ................................................................................................................ 9-2
9.4 CDM-750 Ethernet Overview .................................................................................................... 9-2
9.4.1 Ethernet Interfaces ................................................................................................................................ 9-2
9.4.2 Ethernet Overhead ................................................................................................................................ 9-3
CHAPTER 10. FORWARD ERROR CORRECTION .......................................................... 10-1
10.1 Introduction ............................................................................................................................... 10-1
10.2 LDPC and BCH ......................................................................................................................... 10-1
10.2.1 Range of Data Rates ........................................................................................................................... 10-2
10.2.2 BER, QEF, Eb/No, Es/No Spectral Efficiency, and Occupied Bandwidth .................................... 10-2
CHAPTER 11. G.703 E3/T3/STS-1 PLUG-IN INTERFACE CARD (PIIC) .......................... 11-1
11.1 Introduction ............................................................................................................................... 11-1
11.2 Physical Description .................................................................................................................. 11-2
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