CDM-570/570L Satellite Modem with Optional IP Module Revision 12
Table of Contents MN/CDM570L.IOM
ix
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
b
/N
0
.......................................................................................................................... 9–2
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
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