Comtech EF Data SNM-1000 - Manual (Page 29)

SNM-1000 Node Control Modem Revision 3
Introduction MN/SNM1000.IOM
1-9
1.4.5 Continuous Mode Specifications
Table 1-4. Continuous Mode Operating Specifications
Demodulator Specifications
Input Power (Desired Carrier) -30 to -55 dBm (composite) +30 dB power within 2 MHz from
desired carrier
+40 dB power outside of 2 MHz from desired carrier
-5 dBm maximum composite
Carrier Acquisition Range ± 35 kHz
Clock Acquisition Range ± 100 PPM
Acquisition Time < 1 second at all data rates
Directed Sweep:
Sweep
Range
Sweep Center
0 to 70000 Hz
-35000 to +35000 Hz
1.4.6 Viterbi Performance with Noise, Closed Network
Table 1-5 lists the Viterbi decoder specifications with noise, closed network, for the E
b
/N
0
required to achieve 10 -5 to 10 -8 BER.
Table 1-5. Viterbi Performance
Eb/N0 (dB) Specification
BER 1/2 Rate
10 -5 4.6
10
-6
5.3
10 -7 5.9
10
-8
6.4