Comtech EF Data CDM-625A - Page 143

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