Comtech EF Data CDM-570 Installation And Operation Manual page 17

CDM-570/570L Satellite Modem with Optional IP Module
Table of Contents
7.3.6 Maint (Maintenance) | Unit Info Page ................................................................................ 7-17
CHAPTER 8. FORWARD ERROR CORRECTION OPTIONS ............................................. 8-1
8.1 Introduction ................................................................................................................................. 8-1
8.2 Viterbi .......................................................................................................................................... 8-1
8.3 Reed-Solomon Outer Codec (Hardware Option) ..................................................................... 8-2
8.4 Trellis Coding (requires 8-PSK/8-QAM FAST Option) .......................................................... 8-4
8.5 Turbo Product Codec (Hardware Option) ............................................................................... 8-5
8.5.1 Introduction ........................................................................................................................... 8-5
8.5.2 TPC modes available in the CDM-570/570L ........................................................................ 8-5
8.5.3 8-QAM Modulation .............................................................................................................. 8-6
8.5.4 End-to-End Processing Delay ............................................................................................... 8-6
8.5.5 Comparison of all TPC Modes .............................................................................................. 8-7
8.6 Uncoded Operation (No FEC) ................................................................................................... 8-8
8.7 Rates above 2.5 Msymbols/sec ................................................................................................... 8-9
CHAPTER 9. AUTOMATIC UPLINK POWER CONTROL (AUPC) ..................................... 9-1
9.1 Introduction ................................................................................................................................. 9-1
9.2 Setting AUPC Parameters .......................................................................................................... 9-2
9.2.1 Target E /N
b
9.2.2 Max Range ............................................................................................................................ 9-2
9.2.3 Alarm .................................................................................................................................... 9-2
9.2.4 Demod Unlock ...................................................................................................................... 9-3
9.3 Compensation Rate ..................................................................................................................... 9-3
9.4 Monitoring ................................................................................................................................... 9-3
CHAPTER 10. CLOCKING MODES .................................................................................... 10-1
10.1 Introduction ............................................................................................................................... 10-1
10.2 Transmit Clocking .................................................................................................................... 10-2
10.2.1 Internal Clock ...................................................................................................................... 10-2
10.2.2 Tx Terrestrial ...................................................................................................................... 10-2
10.2.3 Rx Loop-Timed, Rx=Tx ..................................................................................................... 10-2
10.2.4 Rx Loop-Timed, Rx<>Tx (Asymmetric Loop Timing) ...................................................... 10-2
10.3 Receive Clocking ....................................................................................................................... 10-3
10.3.1 Buffer Disabled (Rx Satellite) ............................................................................................. 10-3
.......................................................................................................................... 9-2
0
ix
Revision 12
MN/CDM570L.IOM