Table 7-3. Dvb-S2 Short Fecframe = 16,200 Bits - Comtech EF Data CDM-710 Installation And Operation Manual

CDM-710 Broadcast Satellite Modem
Forward Error Correction Options
Inner
***Es/No
at PER =
Type FEC
10
Code
1/4 -1.55
1/3 -0.44
2/5 0.50
1/2 1.80
3/5 3.03
QPSK 2/3 3.90
3/4 4.83
4/5 5.48
5/6 5.98
8/9 7.00
9/10 7.22
3/5 6.50
2/3 7.62
3/4 8.91
8PSK
5/6 10.45
8/9 11.79
9/10 12.08
2/3 10.27
3/4 11.51
4/5 12.33
16APSK
5/6 12.91
8/9 14.19
9/10 14.43
3/4 14.03
4/5 14.94
5/6 15.58
32APSK
8/9 16.99
9/10 17.35
* Es/No for short FECFrame is about 0.3 dB higher than the standard. Values in the table are approximate.
** 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

Table 7-3. DVB-S2 Short FECFrame = 16,200 bits*

(QPSK 1/4, 1/3 and 2/5 are for information purposes)
Normalized
Spectral
Symbol Rate
Efficiency
(bps/Hz)
(= Bit Rate x)
-7
Pilots Off
0.365324 2.737
0.629060 1.590
0.760928 1.314
0.848840 1.178
1.156532 0.865
1.288400 0.776
1.420269 0.704
1.508181 0.663
1.596093 0.627
1.727961 0.579
NA NA
1.725319 0.580
1.922040 0.520
2.118761 0.472
2.381056 0.420
2.577778 0.388
NA NA
2.548792 0.392
2.809662 0.356
2.983575 0.335
3.157488 0.317
3.418357 0.293
NA NA
3.493093 0.286
3.709309 0.270
3.925526 0.255
4.249850 0.235
NA NA
** Occupied
Spectral
BW for
Efficiency
10 Mbps
(bps/Hz)
(25% Rolloff)
31.479 0.357467
18.281 0.615532
15.113 0.744564
13.548 0.830585
9.944 1.131661
8.926 1.260693
8.097 1.389725
7.625 1.475747
7.205 1.561768
6.655 1.690800
NA NA
6.665 1.692033
5.983 1.884959
5.428 2.077885
4.830 2.335120
4.461 2.528046
NA NA
4.512 2.505223
4.093 2.761633
3.854 2.932574
3.642 3.103514
3.364 3.359924
NA NA
3.292 3.419165
3.100 3.630805
2.930 3.842446
2.706 4.159906
NA NA
7–5
Revision 11
MN/CDM710.IOM
** Occupied
Normalized
BW for
Symbol Rate
10 Mbps
(= Bit Rate x)
(25% Rolloff)
Pilots On
2.797 32.171
1.625 18.683
1.343 15.445
1.204 13.846
0.884 10.162
0.793 9.122
0.720 8.275
0.678 7.793
0.640 7.363
0.591 6.802
NA NA
0.591 6.797
0.531 6.101
0.481 5.534
0.428 4.925
0.396 4.549
NA NA
0.399 4.590
0.362 4.164
0.341 3.921
0.322 3.705
0.298 3.423
NA NA
0.292 3.363
0.275 3.167
NA NA
0.240 2.764
NA NA