Comtech EF Data CDM-625A - Manual (Page 575)

CDM-625A Advanced Satellite Modem MN-CDM625A
Appendix B Revision 3
B–39
Figure B-21. VersaFEC Codec Rates 0.642, 0.711, and 0.780 8-QAM
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 12
Eb/No in dB
Uncoded
BPSK/QPSK
Comtech VersaFEC® Codec
Rate 0.642, 0.711, 0.780
8-QAM
1 2 3 4 5 6 7 8 9 10 11 12
BER
Rate
0.711
8-QAM
Rate
0.642
8-QAM
Typical performance show -
guaranteed performance curves
are 0.3 dB to the right
Uncoded
8-PSK
Rate
0.780
8-QAM