Comtech EF Data CDM-625A Installation And Operation Manual page 143

CDM-625A Advanced Satellite Modem
Front Panel Operation
Encoder Type
VF2L
(VersaFEC-2 Long Block)
or
VF2S
(VersaFEC-2 Short Block)
When you install the TPC/LDPC hardware option and you select TPC from the CONFIG: Tx >FEC
submenu, the options appear as shown:
Mod=QPSK
FEC Rate=1/2
When you select VFEC from the CONFIG: Tx > FEC submenu, the options appear as shown:
Mod=BPSK
FEC Rate=0.488 (Fixed)
When you select ULL from the CONFIG: Tx > FEC submenu, the options appear as shown:
Mod=BPSK
FEC Rate=0.493 (Fixed)
When you select VF2S or VF2L from the CONFIG: Tx > FEC submenu, the options appear as
shown:
Mod=BPSK
FEC Rate=0.489 (Fixed)
Modulation Type
BPSK
QPSK
8-ARY
16-ARY
32-ARY
(B,Q OQ,8PSK,16Q,8QAM)
(1/2,3/4,7/8,0.95)
(B,Q,8QAM,16QAM)
(B,Q)
(B,Q,8/16/32-ARY)
6–19
MN-CDM625A
Revision 4
FEC Rate Choice
Fixed at 0.489
0.489, 0.537, 0.586, 0.611, 0.635,
0.660, 0.684, 0.733
0.521, 0.537, 0.562, 0.586, 0.611,
0.635, 0.770, 0.684, 0.708, 0.733
0.586, 0.611, 0.635, 0.660, 0.684,
0.708, 0.733, 0.757, 0.782
0.660, 0.684, 0.708, 0.733, 0.757,
0.782, 0.801, 0.831, 0.855, 0.879
()
()
()
()