Comtech EF Data CDM-625 Installation And Operation Manual page 194

CDM-625 Advanced Satellite Modem
Forward Error Correction Options
1
1E-1
1E-2
1E-3
1E-4
Combined sync
1E-5
threshold, demod
and Viterbi
Decoder, Rate 1/2
1E-6
1E-7
Typical performance
1E-8
1E-9
1
BER
Figure 7-2. Viterbi with concatenated R-S Outer Code
2 3 4 5
Uncoded BPSK/QPSK
Sync
threshold,
Rate 3/4
Sync
threshold,
Rate 7/8
2 3 4 5
MN-0000036 (Ref MN/CDM625.IOM)
6 7 8
Specification
Limit Rate 1/2
and 220,200
Outer Code
Specification
Limit Rate 3/4
and 220,200
Outer Code
6 7 8
7–12
Revision 1
Eb/No in dB
9 10 11
Viterbi with
concatenated
RS 220,200
Outer Code
Specification
Limit Rate 7/8
and 220,200
Outer Code
9 10 11
12
12