Comtech EF Data CDM-570AL - Page 488

CDM-570A/570AL Satellite Modem with Optional Packet Processor
Revision 5
FEC (Forward Error Correction) Options B–24 MN-CDM570A
Figure B-6. 16-QAM Rates 3/4 and 7/8 with Concatenated RS 220,200 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 11 12
Eb/No in 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