Comtech EF Data SNM-1002 - Manual (Page 27)

SNM-1002 LinkSync™ Modem Revision 2
Introduction MN/SNM1002.OM
1–9
1.5.1 BER Threshold
The modem will have a programmable BER threshold function. This will allow the
operator to set the threshold from 1.0 E-3 to 1.0 E-8.
10
-4
10
-3
10
-5
10 -6
BER
10 -7
10
-9
10 -8
10
-10
3.0 4.0 5.0 6.0
E
b
/N
0
(dB)
7.0 8.0 9.0 10.0 11.0
10 -2
1/2 Rate 3/4 Rate 7/8 Rate
SPECIFICATIONS
Figure 1-6. Viterbi BER Performance Curves