Table 7-2. Dvb-S2 Standard Fecframe = 64, 800 Bits - Comtech EF Data CDM-710 Installation And Operation Manual

CDM-710 Broadcast Satellite Modem
Forward Error Correction Options

Table 7-2. DVB-S2 Standard FECFrame = 64, 800 bits

Inner
**Es/No at
Type FEC
Code
1/4
1/3
2/5
1/2
3/5
QPSK 2/3
3/4
4/5
5/6
8/9
9/10
3/5
2/3
3/4
8PSK
5/6
8/9
9/10
2/3
3/4
4/5
16APSK
5/6
8/9
9/10
3/4
4/5
32APSK 5/6
8/9
9/10
* Taken at the -10 dB points on the plot of power spectral density, the occupied bandwidth is 1.19 x Symbol
Rate for 35%, and 1.15 x Symbol Rate for 25%.
** Includes implementation loss.
(QPSK 1/4, 1/3 and 2/5 are for information purposes)
Normalized
Spectral
Symbol
Efficiency
PER =
(bps/Hz)
(= Bit Rate
10
-7
Pilots Off
-1.85 0.490243 2.040
-0.74 0.656448 1.523
0.20 0.789412 1.267
1.50 0.988858 1.011
2.73 1.188304 0.842
3.60 1.322253 0.756
4.53 1.487473 0.672
5.18 1.587196 0.630
5.68 1.654663 0.604
6.70 1.766451 0.566
6.92 1.788612 0.559
6.20 1.779991 0.562
7.32 1.980636 0.505
8.61 2.228124 0.449
10.15 2.478562 0.403
11.49 2.646012 0.378
11.78 2.679207 0.373
9.97 2.637201 0.379
11.21 2.966728 0.337
12.03 3.165623 0.316
12.61 3.300184 0.303
13.89 3.523143 0.284
14.13 3.567342 0.280
13.73 3.703295 0.270
14.64 3.951571 0.253
15.28 4.119540 0.243
16.69 4.397854 0.227
17.05 4.453027 0.225
* Occupied
BW for
Rate
10 Mbps Efficiency
(25%
x)
Rolloff)
23.458 0.478577
17.519 0.640827
14.568 0.770627
11.630 0.965327
9.678 1.160026
8.697 1.290788
7.731 1.452076
7.245 1.549426
6.950 1.615288
6.510 1.724416
6.430 1.746049
6.461 1.739569
5.806 1.935658
5.161 2.177525
4.640 2.422276
4.346 2.585924
4.292 2.618365
4.361 2.574613
3.876 2.896320
3.633 3.090495
3.485 3.221863
3.264 3.439530
3.224 3.482680
3.105 3.623332
2.910 3.866247
2.792 4.030589
2.615 4.302894
2.583 4.356875
7–4
MN/CDM710.IOM
Normalized
Spectral
Symbol
Rate
(bps/Hz)
(= Bit Rate
x)
Pilots On
2.090
1.560
1.298
1.036
0.862
0.775
0.689
0.645
0.619
0.580
0.573
0.575
0.517
0.459
0.413
0.387
0.382
0.388
0.345
0.324
0.310
0.291
0.287
0.276
0.259
0.248
0.232
0.230
Revision 11
* Occupied
BW for
10 Mbps
(25%
Rolloff)
24.030
17.946
14.923
11.913
9.914
8.909
7.920
7.422
7.119
6.669
6.586
6.611
5.941
5.281
4.748
4.447
4.392
4.467
3.971
3.721
3.569
3.343
3.302
3.174
2.974
2.853
2.673
2.640