CDM-625 Advanced Satellite Modem Revision 13
Forward Error Correction Options MN-CDM625
7–24
Figure 7-11. Rate 21/44 BPSK, QPSK, OQPSK Turbo Product Codec
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
Comtech Turbo Product Codec
Rate 21/44 BPSK/QPSK/OQPSK
1 2 3 4 5 6 7 8 9 10 11 12
Spec limit
Rate 21/44
B/Q/OQPSK
* Rate 21/44 QPSK is
shown as R1/2 on the
front panel
* The OQPSK acquisition
and tracking thresholds
are approx. 1 dB worse
than the QPSK case