Comtech EF Data CDM-840 User Manual
Page 190
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CDM-840 Remote Router
Revision 2
Appendix B
MN-CDM840
B–6
Figure B-7. VersaFEC Codec – QPSK, Rate 0.533, 0.631, 0.706 and 0.803
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 0.533, 0.631, 0.706,
and 0.803 QPSK
1 2 3 4 5 6 7 8 9 10 11 12
BER
Rate
0.533
QPSK
Typical performance shown -
guaranteed performance curves
are 0.3 dB to the right
Rate
0.631
QPSK
Rate
0.706
QPSK
Rate
0.803
QPSK
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