Comtech EF Data CDM-710 Installation And Operation Manual page 106

CDM-710 Broadcast Satellite Modem
Forward Error Correction Options
QPSK 1/4, 1/3 and 2/5 are for information purposes.
DVB-S2 Standard FECFrame = 64, 800 bits
Inner **Es/No
At PER =
Type FEC
10
Code
QPSK 1/4 -1.85
QPSK 1/3 -0.74
QPSK 2/5 0.20
QPSK 1/2 1.50
QPSK 3/5 2.73
QPSK 2/3 3.60
QPSK 3/4 4.53
QPSK 4/5 5.18
QPSK 5/6 5.68
QPSK 8/9 6.70
QPSK 9/10 6.92
8PSK 3/5 6.20
8PSK 2/3 7.32
8PSK 3/4 8.61
8PSK 5/6 10.15
8PSK 8/9 11.49
8PSK 9/10 11.78
16APSK 2/3 9.97
16APSK 3/4 11.21
16APSK 4/5 12.03
16APSK 5/6 12.61
16APSK 8/9 13.89
16APSK 9/10 14.13
32APSK 3/4 13.73
32APSK 4/5 14.64
32APSK 5/6 15.28
32APSK 8/9 16.69
32APSK 9/10 17.05
*The occupied bandwidth is 1.19 x Symbol Rate for 35% and 1.15 x Symbol Rate for 25% taken at
the -10 dB points on the plot of power spectral density.
**Includes implementation loss.
The figures that follow contain the error performance characteristics. To convert Es/No to Eb/No
use Eb/No = Es/No - 10xLog(Spectral Efficiency).
Spectral Normalized
Efficiency Symbol Rate
-7
(bps/Hz)
(= Bit Rate x)
Pilots Off
0.490243 2.040
0.656448 1.523
0.789412 1.267
0.988858 1.011
1.188304 0.842
1.322253 0.756
1.487473 0.672
1.587196 0.630
1.654663 0.604
1.766451 0.566
1.788612 0.559
1.779991 0.562
1.980636 0.505
2.228124 0.449
2.478562 0.403
2.646012 0.378
2.679207 0.373
2.637201 0.379
2.966728 0.337
3.165623 0.316
3.300184 0.303
3.523143 0.284
3.567342 0.280
3.703295 0.270
3.951571 0.253
4.119540 0.243
4.397854 0.227
4.453027 0.225
* Occupied Spectral
BW for Efficiency
(bps/Hz)
10 Mbps
(25% 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
Revision 9
MN/CDM710.IOM
Normalized * Occupied
Symbol Rate BW for
(= Bit Rate x) 10 Mbps
(25% Rolloff)
Pilots On
2.090 24.030
1.560 17.946
1.298 14.923
1.036 11.913
0.862 9.914
0.775 8.909
0.689 7.920
0.645 7.422
0.619 7.119
0.580 6.669
0.573 6.586
0.575 6.611
0.517 5.941
0.459 5.281
0.413 4.748
0.387 4.447
0.382 4.392
0.388 4.467
0.345 3.971
0.324 3.721
0.310 3.569
0.291 3.343
0.287 3.302
0.276 3.174
0.259 2.974
0.248 2.853
0.232 2.673
0.230 2.640