CDM-570/570L Satellite Modem with Optional IP Module Revision 4
Forward Error Correction Options MN/CDM570L.IOM
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 Turbo P roduct Codec

Rate 7/8 QPSK/OQPSK,

8-PSK and 16-QAM

1 2 3 4 5 6 7 8 9 10 11 12
BER
Spec l im i t
Rate 7/8
16-QAM
Spec limit
Rate 7/8
8-PSK
Spec limit
Rate 7/ 8
QPSK/OQPSK
Ty pical performance
Uncoded
8-PSK
Uncoded
16-QAM
Figure 7-5. Comtech EF Data Turbo Product Codec
Rate 7/8 QPSK/OQPSK, 8-PSK AND 16-QAM
7–14