Comtech EF Data CDM-550T User Manual
Page 147
CDM-550T Satellite Modem
Revision 3
Eb/No Measurement
MN/CDM550T.IOM
(C+N)/N
Eb/No -
Uncoded
BPSK
Eb/No -
Rate 1/2
BPSK
Eb/No -
Uncoded
QPSK
Eb/No -
Rate 1/2
QPSK
Eb/No -
Rate 3/4
QPSK
Eb/No -
Rate 7/8
QPSK
3.0
0.0
3.0
-
0.0
-
-
3.5
0.9
3.9
-
0.9
-
-
4.0
1.8
4.8
-
1.8
0.0
-
4.5
2.6
5.6
-
2.6
0.8
0.1
5.0
3.3
6.3
0.3
3.3
1.5
0.8
5.5
4.1
7.1
1.1
4.1
2.3
1.6
6.0
4.7
7.7
1.7
4.7
2.9
2.2
6.5
5.4
8.4
2.4
5.4
3.6
2.9
7.0
6.0
9.0
3.0
6.0
4.2
3.5
7.5
6.6
9.6
3.6
6.6
4.8
4.1
8.0
7.3
10.3
4.3
7.3
5.5
4.8
8.5
7.8
10.8
4.8
7.8
6.0
5.3
9.0
8.4
11.4
5.4
8.4
6.6
5.9
9.5
9.0
12.0
6.0
9.0
7.2
6.5
10.0
9.5
12.5
6.5
9.5
7.7
7.0
10.5
10.1
13.1
7.1
10.1
8.3
7.6
11.0
10.6
13.6
7.6
10.6
8.8
8.1
11.5
11.2
14.2
8.2
11.2
9.4
8.7
12.0
11.7
14.7
8.7
11.7
9.9
9.2
12.5
12.2
15.2
9.2
12.2
10.4
9.7
13.0
12.8
15.8
9.8
12.8
11.0
10.3
13.5
13.3
16.3
10.3
13.3
11.5
10.8
14.0
13.8
16.8
10.8
13.8
12.0
11.3
14.5
14.3
17.3
11.3
14.3
12.5
11.8
15.0
14.9
17.9
11.9
14.9
13.1
12.4
15.5
15.4
18.4
12.4
15.4
13.6
12.9
16.0
15.9
18.9
12.9
15.9
14.1
13.4
16.5
16.4
19.4
13.4
16.4
14.6
13.9
17.0
16.9
19.9
13.9
16.9
15.1
14.4
17.5
17.4
20.4
14.4
17.4
15.6
14.9
18.0
17.9
20.9
14.9
17.9
16.1
15.4
Notes:
1) OQPSK values are the same as QPSK
2) In framed (EDMAC)modes, no RS, add 0.2 dB to the values of Eb/No shown
3) In RS modes, no EDMAC, add 0.4 dB to the values of Eb/No shown
4) In RS modes with EDMAC, add 0.6 dB to the values of Eb/No shown
5) Consult Factory for information on Rate 21/44 and Rate 5/16 Turbo BPSK
B–3