Comtech EF Data CDM-625 - Manual (Page 307)

CDM-625 Advanced Satellite Modem Revision 15
Forward Error Correction Options MN-CDM625
7–35
Figure 7-22. VersaFEC Extended CCM – 8-QAM Rate 0.576 and 16-QAM, Rate 0.644
1E-9
1E-8
1E-7
1E-6
1E-5
1E-4
1E-3
1E-2
1E-1
1 2 3 4 5 6 7 8 9 10 11 1 2
Eb/No in dB
Uncoded
BPSK/QPSK
Comtech VersaFEC®
Codec - Extended CCM
0.576 8-QAM and
0.644 16-QAM
1 2 3 4 5 6 7 8 9 10 11 12
BER
Rate
0.576
8-QAM
Typical performance show -
guaranteed performance
curves are 0.3 dB to the right
Uncoded
8-PSK
Rate
0.644
16-QAM