Comtech EF Data SDM-9000 - Manual (Page 165)

SDM-9000 Satellite Modem Maintenance
Rev. 4 6–7
Table 6-3. Conversion to S/N and E
b
/N
0
Chart (16QAM)
(dB) Code Rate 3/4 Code Rate 7/8
(S+N)/N S/N E
b
/N
0
S/N E
b
/N
0
4.0 1.8 -3.0 1.8 -3.6
4.5 2.6 -2.2 2.6 -2.8
5.0 3.3 -1.4 3.3 -2.1
5.5 4.1 -0.7 4.1 -1.4
6.0 4.7 -0.0 4.7 -0.7
6.5 5.4 0.6 5.4 -0.0
7.0 6.0 1.3 6.0 0.6
7.5 6.6 1.9 6.6 1.2
8.0 7.3 2.5 7.3 1.8
8.5 7.8 3.1 7.8 2.4
9.0 8.4 3.6 8.4 3.0
9.5 9.0 4.2 9.0 3.5
10.0 9.5 4.8 9.5 4.1
10.5 10.1 5.3 10.1 4.7
11.0 10.6 5.9 10.6 5.2
11.5 11.2 6.4 11.2 5.7
12.0 11.7 6.9 11.7 6.3
12.5 12.2 7.5 12.2 6.8
13.0 12.8 8.0 12.8 7.3
13.5 13.3 8.5 13.3 7.9
14.0 13.8 9.1 13.8 8.4
14.5 14.3 9.6 14.3 8.9
15.0 14.9 10.1 14.9 9.4
15.5 15.4 10.6 15.4 9.9
16.0 15.9 11.1 15.9 10.4
16.5 16.4 11.6 16.4 11.0
17.0 16.9 12.1 16.9 11.5
17.5 17.4 12.7 17.4 12.0
18.0 17.9 13.2 17.9 12.5
18.5 18.4 13.7 18.4 13.0
19.0 18.9 14.2 18.9 13.5
19.5 19.5 14.7 19.5 14.0
20.0 20.0 15.2 20.0 14.5