Config: Tx  Mod (Modulation) - Comtech EF Data CDM-625A Installation And Operation Manual

CDM-625A Advanced Satellite Modem
Front Panel Operation
6.2.1.3.5 CONFIG: Tx  Mod (Modulation)
Mod=QPSK
FEC Rate=1/2
Use the ◄ ► arrow keys to select the Modulation type (top line) or the FEC rate (bottom line),
and then use the
the Modulation Type and FEC rate choices:
Encoder Type
No Encoder
Non-Turbo Encoder
TPC
(with TPC/LDPC Codec installed)
LDPC
(with TPC/LDPC Codec installed)
VFEC
ULL (VersaFEC Ultra-Low
Latency)
If selecting TPC from the FEC menu with TPC/LDPC Codec installed, the options appear as
shown:
Mod=QPSK
FEC Rate=1/2
If selecting VFEC from the FEC menu, the options appear as shown:
Mod=BPSK
FEC Rate=0.488 (Fixed)
(B,Q,OQ,8PSK,16Q,8QAM)
(1/2,3/4,7/8)
arrow keys to change that parameter selection. The Encoder type dictates
▲▼
Modulation Type
BPSK
QPSK, OQPSK
BPSK
TCM 8-PSK (FAST option)
QPSK, OQPSK
16-QAM (Vit+RS only)
BPSK
QPSK, OQPSK
8-PSK (FAST option)
16-QAM (FAST option)
BPSK
QPSK, OQPSK
8-PSK, 8-QAM (FAST)
16-QAM (FAST option)
BPSK
QPSK
8-QAM (FAST option)
16-QAM (FAST option)
BPSK
QPSK
(B,Q OQ,8PSK,16Q,8QAM)
(1/2,3/4,7/8,0.95)
(B,Q,8QAM,16QAM)
6–19
Revision 0
MN-CDM625A
()
FEC Rate Choice
Fixed at 1/1
Fixed at 1/1
Fixed at Rate 1/2
Fixed at Rate 2/3
1/2, 3/4, 7/8
3/4, 7/8
5/16, 21/44
1/2 (aka 21/44), 3/4, 7/8, 0.95
3/4, 7/8, 0.95
3/4, 7/8
Fixed at 1/2
1/2, 2/3, 3/4
2/3, 3/4
Fixed at 3/4
Fixed at 0.488
0.533, 0.631, 0.706, 0.803
0.576, 0.642, 0.711, 0.780
0.644, 0.731, 0.780, 0.829, 0.853
Fixed at 0.493
0.493, 0.654, 0.734
()
()