Comtech EF Data SDM-9000, Installation And Operation Manual

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Introduction SDM-9000 Satellite Modem
1–14 Rev. 4
1.4.2 Reed-Solomon Codec BER (QPSK)
The Reed-Solomon specifications for the E
b
/N
0
required to achieve 10 -6 to 10 -10 BER for
different configurations are shown in Table 1-3. All values are for QPSK mode
operation. Refer to Figure 1-5 for the Reed-Solomon BER curves.
Table 1-3. Reed-Solomon BER Data
Specification
BER 1/2 Rate 3/4 Rate 7/8 Rate
10
-6
4.1 dB 5.6 dB 6.7 dB
10
-7
4.2 dB 5.8 dB 6.9 dB
10
-8
4.4 dB 6.0 dB 7.1 dB
10
-10 4.7 dB 6.4 dB 7.5 dB
Typical
BER 1/2 Rate 3/4 Rate 7/8 Rate
10
-6 3.5 dB 5.0 dB 6.1 dB
10
-7 3.6 dB 5.2 dB 6.3 dB
10
-8 3.8 dB 5.4 dB 6.5 dB
10
-10
4.1 dB 5.8 dB 6.9 dB