Comtech EF Data CDM-625A Installation And Operation Manual page 539

CDM-625A Advanced Satellite Modem
Appendix B
1
1E-1
Uncoded
BPSK/QPSK
1E-2
1E-3
1E-4
1E-5
1E-6
1E-7
1E-8
1E-9
1
BER
Figure B-22. VersaFEC Codec Extended CCM Rate 0.576 8-QAM and Rate 0.644
2 3 4
Rate
Rate
0.576
0.644
8-QAM
16-QAM
2 3 4
5 6 7
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
5 6 7
16-QAM
B–35
MN-CDM625A
Eb/No in dB
8 9 10 11
Uncoded
8-PSK
8 9 10 11
Revision 0
1 2
12