Comtech EF Data CDM-625 - Manual (Page 291)

CDM-625 Advanced Satellite Modem Revision 15
Forward Error Correction Options MN-CDM625
7–19
Figure 7-6. Rate 3/4, Rate 7/8 16-QAM with Concatenated RS Outer Code
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 1 1 12
Eb/No i n dB
Specification limit Rate
3/4 Viterbi and 220,200
RS Outer Code
Uncoded BPSK/QPSK
Typical
Performance
Specification
limit Rate 7/8
Viterbi and
220,200 RS
Outer Code
1 2 3 4 5 6 7 8 9 10 11 12
BER
16-QAM Viterbi, Rate 3/4 and Rate 7/8
with 220,200 RS Outer Code
Uncoded 16-QAM