Config: Rx) Fec (Fec Decoder Type) - Comtech EF Data CDM-570A Installation And Operation Manual

CDM-570A/570AL Satellite Modem with Optional Packet Processor
Front Panel Operation
6.3.2.4.1

(CONFIG: Rx) FEC (FEC Decoder Type)

Rx FEC: Viterbi Vit-RS
TCM-RS TPC VFEC ULL Unc
◄ ►
Use the arrow keys to select the FEC Decoder type. Press ENTER.
1) IMPORTANT NOTE – All selections are always viewable. If a Hardware or FAST
option is either uninstalled or invalid, the cursor will skip past the unavailable
choice.
2) The VFEC (VersaFEC) and ULL (Ultra Low Latency) Rx FEC types and their
available Rx Demodulation Types, Codes, and Data Rates are UNAVAILABLE
when operating in CDM-570 Compatible Mode. If the Rx FEC Type is VFEC or ULL
when CDM-570 Compatible Mode is selected, then the Rx FEC Type will be reset
to Viterbi and the Demodulation and Code Rate will also be reset to appropriate
values. See Sect. 6.2 for further information.
Rx FEC Decoder Selection
Viterbi
Vit-RS
(Viterbi + Concatenated Reed-
Solomon)
TCM-RS (Trellis Coded Modulation
+ Concatenated Reed-Solomon)
TPC (Turbo Product Codec)
VFEC (VersaFEC)
ULL (Ultra Low Latency)
Unc (Uncoded)
Referring to the preceding table, the "Rx FEC Decoder Selection" dictates the "Available Rx
Demodulation Type" and "Available Rx Code Rate" choices.
Available Rx Demodulation Type
BPSK
QPSK
OQPSK
BPSK
QPSK
OQPSK
16-QAM (FAST)
8-PSK (FAST)
BPSK
QPSK
OQPSK
8-PSK (FAST)
8-QAM (FAST)
16-QAM (FAST)
BPSK
QPSK
Note 2
8-QAM (FAST)
16-QAM (FAST)
BPSK
Note 2
QPSK
BPSK
QPSK
OQPSK
6–25
MN-CDM570A
Revision 3
Available Rx Code Rate
Fixed at 1/2
1/2, 3/4, 7/8
Fixed at 1/2
1/2, 3/4, 7/8
3/4, 7/8
Fixed at 2/3
5/16, 21/44
21/44, 3/4, 7/8, 0.95
3/4, 7/8, 0.95
3/4, 7/8
Fixed at .488
.533, .631, .706, .803
.576, .642, .711, .780
.644, .731, .780, .829, .853
Fixed at .493
.493, .654, .734
Fixed at 1:1