Comtech EF Data CDM-570A Installation And Operation Manual page 496

1
1E-1
Uncoded
BPSK/QPSK
1E-2
Rate
0.642
8-QAM
1E-3
1E-4
1E-5
1E-6
1E-7
1E-8
1E-9
1 2
BER
Figure B-14. VersaFEC Codec Rates 0.642, 0.711, and 0.780 8-QAM
FEC (Forward Error Correction) Options
CDM-570A/570AL Satellite Modem with Optional Packet Processor
2 3 4 5
Rate Rate
0.711 0.780
8-QAM 8-QAM
3 4 5
6 7 8
Comtech VersaFEC® Codec
Rate 0.642, 0.711, 0.780
8-QAM
Typical performance show -
guaranteed performance curves
are 0.3 dB to the right
6 7 8
B–32
Revision 5
Eb/No in dB
9 10 11 12
Uncoded
8-PSK
9 10 11 12
MN-CDM570A