Comtech EF Data cdm-570a - Page 492

CDM-570A/570AL Satellite Modem with Optional Packet Processor
Revision 5
FEC (Forward Error Correction) Options B–28 MN-CDM570A
Figure B-10. Turbo Product Codec Rate 7/8 QPSK/OQPSK, 8-PSK/8-QAM, and 16-QAM
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 Product Codec
Rate 7/8 QPSK/OQPSK,
8-PSK/8-QAM and 16-QAM
1 2 3 4 5 6 7 8 9 10 11 12
BER
Spec limit
Rate 7/8
16-QAM
Spec limit
Rate 7/8
8-PSK
8-QAM
Spec limit -
Rate 7/8
QPSK/OQPSK
Typical performance
Uncoded
8-PSK
Uncoded
16-QAM