Comtech EF Data CDM-570A Installation And Operation Manual page 498

1
1E-1
Uncoded
BPSK/QPSK
1E-2
1E-3
1E-4
1E-5
1E-6
1E-7
1E-8
1E-9
1 2
BER
Figure B-16. VersaFEC Codec Extended CCM Rate 0.576 8-QAM and Rate 0.644 16-QAM
FEC (Forward Error Correction) Options
CDM-570A/570AL Satellite Modem with Optional Packet Processor
2 3 4 5
Rate
Rate
0.576
0.644
8-QAM
16-QAM
3 4 5
6 7 8
Comtech VersaFEC®
Codec - Extended CCM
0.576 8-QAM and
0.644 16-QAM
Typical performance show -
guaranteed performance
curves are 0.3 dB to the right
6 7 8
B–34
Revision 5
Eb/No in dB
9 10 11 12
Uncoded
8-PSK
9 10 11
MN-CDM570A
12