Comtech EF Data CDM-625A User Manual
Page 77
CDM-625A Advanced Satellite Modem
MN-CDM625A
Introduction
Revision 3
1–33
Table 1-4. The VersaFEC-2 ModCod Set – Short Block
ModCod Modulation Code
Rate
Spectral
efficiency,
bps/Hz
Block
size,
bits
Typical *
Es/No
(SNR), for
BER = 1 x 10
-8
(dB)
Latency
at
128 kbps
(ms)
Min.
Data Rate,
CCM Mode
(kbps)
Max.
Data Rate,
CCM Mode
(Mbps)
Min Sym
Rate, ACM
Mode
(ksps)
Max Sym
Rate, ACM
Mode
(Msps)
00
BPSK
0.489
0.489
800
-0.2
16
18.0
2.0
37
1
01
QPSK
0.489
0.977
1600
2.3
30
18.0
2.0
37
1
02
QPSK
0.537
1.075
1760
2.8
33
19.3
2.0
37
1
03
QPSK
0.586
1.173
1920
3.4
36
21.1
2.0
37
1
04
QPSK
0.611
1.221
2000
3.7
37
22.0
2.0
37
1
05
QPSK
0.635
1.270
2080
3.9
38
22.9
2.0
37
1
06
QPSK
0.660
1.319
2160
4.2
39
23.7
2.0
37
1
07
QPSK
0.684
1.368
2240
4.5
41
24.6
2.0
37
1
08
QPSK
0.733
1.466
2400
5.2
43
26.4
2.0
37
1
09
8-ARY
0.521
1.564
2560
5.6
46
28.1
2.0
37
1
10
8-ARY
0.537
1.612
2640
5.9
47
29.0
2.0
37
1
11
8-ARY
0.562
1.686
2760
6.2
49
30.3
2.0
37
1
12
8-ARY
0.586
1.759
2880
6.4
51
31.7
2.0
37
1
13
8-ARY
0.611
1.832
3000
6.6
53
33.0
2.0
37
1
14
8-ARY
0.635
1.906
3120
6.9
55
34.3
2.0
37
1
15
8-ARY
0.660
1.979
3240
7.2
57
35.6
2.0
37
1
16
8-ARY
0.684
2.052
3360
7.5
59
36.9
2.0
37
1
17
8-ARY
0.708
2.125
3480
7.8
61
38.3
2.0
37
1
18
8-ARY
0.733
2.199
3600
8.3
63
39.6
2.0
37
1
19
16-ARY
0.586
2.345
3840
8.7
67
42.2
2.0
37
1
20
16-ARY
0.611
2.443
4000
9.0
70
44.0
2.0
37
1
21
16-ARY
0.635
2.541
4160
9.3
73
45.7
2.0
37
1
22
16-ARY
0.660
2.638
4320
9.7
76
47.5
2.0
37
1
23
16-ARY
0.684
2.736
4480
10.3
79
49.3
2.0
37
1
24
16-ARY
0.708
2.834
4640
10.7
82
51.0
2.0
37
1
25
16-ARY
0.733
2.932
4800
11.0
85
52.8
2.0
37
1
26
16-ARY
0.757
3.029
4960
11.6
88
54.5
2.0
37
1
27
16-ARY
0.782
3.127
5120
12.2
91
56.3
2.0
37
1
28
32-ARY
0.660
3.298
5400
12.8
93
59.4
2.0
37
1
29
32-ARY
0.684
3.420
5600
13.1
96
61.6
2.0
37
1
30
32-ARY
0.708
3.542
5800
13.4
99
63.8
2.0
37
1
31
32-ARY
0.733
3.664
6000
14.0
102
66.0
2.0
37
1
32
32-ARY
0.757
3.787
6200
14.4
105
68.2
2.0
37
1
33
32-ARY
0.782
3.909
6400
14.8
109
70.4
2.0
37
1
34
32-ARY
0.801
4.007
6560
15.2
112
72.1
2.0
37
1
35
32-ARY
0.831
4.153
6800
15.8
117
74.8
2.0
37
1