Comtech EF Data CDM-600/600L - Manual (Page 148)

CDM-600/600L Open Network Satellite Modem Revision 3
Forward Error Correction Options MN/CDM600L.IOM
6–28
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
BER
Spec limit
QPSK/OQPSK
Rate 3/4 Uncoded
8-PSK
Typical limit
QPSK/OQPSK
Rate 3/4
1 2 3 4 5 6 7 8 9 10 11 12
LDPC, Rate 3/4
QPSK/OQPSK/
8-QAM
Spec limit
8-QAM
Rate 3/4
Typical limit
8-QAM
Rate 3/4
Figure 6-16. LDPC, Rate 3/4, (O)QPSK / 8-QAM