Comtech EF Data SNM-1002 - Manual (Page 106)

SNM-1002 LinkSync
 Modem
Revision 2
Theory of Operation MN/SNM1002.OM
4–12
4.4.1 Demodulator Specifications
Refer to Table 4-2 for demodulator specification.
Table 4-2. Demodulator Specification
Parameter Specification
Demodulation Types BPSK, QPSK
Data Rate Range 2.4 kbit/s to 1.25 Mbit/s 1/2 Rate BPSK
4.8 kbit/s to 2.5 Mbit/s 1/2 Rate QPSK
7.2 kbit/s to 3.75 Mbit/s 3/4 Rate QPSK
8.4 kbit/s to 4.375 Mbit/s 7/8 Rate QPSK
Symbol Rate Range 4.8 ks/s to 2.5 Ms/s
IF Frequency 50 to 180 MHz, in 1 Hz steps
Input Level -30 to -55 dBm
Decoding Type Viterbi: 1/2, 3/4, 7/8
Filter Masks EFD Closed net
Descrambler Type V.35
Reported Faults Carrier Detect
IF Synthesizer
BER Threshold
RX Clock Syn
Module
I Channel
Q Channel