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Demodulator specifications, 1 demodulator specifications – Comtech EF Data SNM-1002 User Manual

Page 106

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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