Comtech EF Data SDM-300A - Manual (Page 378)

SDM-300A Satellite Modem Revision 6
Specifications MN/SDM300A.IOM
19–22
19.6.9 Performance with Noise, Uncoded (1/1) BPSK, QPSK, and Offset
QPSK
Table 19-18 shows uncoded BPSK with scrambler/desrambler Off. Encoded QPSK and
Offset QPSK with scrambler/descrambler and differential encoder/decoder Off.
Table 19-18. Uncoded (1/1) BPSK, QPSK, and Offset QPSK
Eb/N0 (dB) Specification
BER 1/1
10 -3 8.0
10 -4 9.6
10 -5 10.8
10 -6 11.6
10 -7 12.4
19.6.10 Performance with Noise Turbo Product Codec (Optional)
Table 19-19. Turbo Product Codec
QPSK BPSK 8-PSK
BER 3/4 Rate 21/44 Rate 5/16 Rate 3/4 rate
10 -6 3.9 2.8 see Note 7.0
10 -7 4.1 3.1 see Note 7.3
10 -8 4.3 3.3 see Note 7.6
10 -9 4.8 3.7 4.0 8.0
Note: 5/16 BPSK is included for compatibility with other equipment but implementation
limitations prohibit optimum performance at low Eb/No. Performance is virtually error free
above 4 dB Eb/No. Performance below 4dB Eb/No is not guaranteed.
19.6.11 BER Threshold
The modem has a programmable BER threshold function. This allows the operator to set the
threshold from 1.0 E-3 to 1.0 E-8.