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CDM-600L Satellite Modem
Offset QPSK Operation
The two consequences of this are:
1. Acquisition may be longer, especially at low data rates.
2. The acquisition threshold is higher than for normal QPSK, although the
demodulator will maintain lock down to its normal levels. The acquisition
thresholds are as follows:
5 dB Eb/No for Rate 1/2
3 dB Eb/No for Rate 3/4
2 dB Eb/No for Rate 7/8
2 dB Eb/No for Uncoded operation (No FEC)
8–2
Revision 2
MN/CDM600L.IOM
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