Comtech EF Data CDM-625 - Manual (Page 306)

CDM-625 Advanced Satellite Modem Revision 15
Forward Error Correction Options MN-CDM625
7–34
Figure 7-21. VersaFEC Codec – 16-QAM, Rate 0.731, 0.780, 0.829 and 0.853
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
Rate
0.780
16-QAM
Uncoded BPSK/QPSK
Typical Performance shown -
guaranteed performance curves
are 0.3dB to the right
Rate
0.731
16-QAM
1 2 3 4 5 6 7 8 9 10 11 12
BER
Comtech VersaFEC® Codec
Rate 0.731, 0.780, 0.829
and 0.853 16-QAM
Uncoded 16-QAM
Rate
0.829
16-QAM
Rate
0.853
16-QAM