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

CDM-570A/570AL Satellite Modem with Optional Packet Processor
Front Panel Operation
6.3.2.3.1

(CONFIG: Tx) FEC (FEC Encoder Type)

Tx FEC: Viterbi Vit-RS
TCM-RS TPC VFEC ULL Unc
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) Tx FEC types and their available
Tx Modulation Types, Codes, and Data Rates are UNAVAILABLE when operating in
CDM-570 Compatible Mode. If the Tx FEC Type is VFEC or ULL when CDM-570
Compatible Mode is selected, then the Tx FEC Type will be reset to Viterbi and the
Modulation and Code Rate will also be reset to appropriate values. See Sect. 6.2
for further information.
Tx FEC Encoder 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)
◄ ►
arrow keys to select the FEC Encoder type. Press ENTER. Referring to the preceding
Use the
table, the "Tx FEC Encoder Selection" dictates the "Available Tx Modulation Type" and
"Available Tx Code Rate" choices.
Available Tx Modulation 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
6–15
MN-CDM570A
Revision 3
Available Tx 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