Comtech EF Data CDM-740 User Manual
Page 64
CDM-740 Advanced Satellite Modem
Revision 0
Front Panel Operation
MN-CDM740
5–12
Table 5-2. Rx Symbol Rate / Data Rate Ranges – DVB-S
Demodulation
FEC Code
Code Rate
Symbol Rate (Msps)
Spectral Efficiency
Data Rate (Mbps)
Min
Max
Min
Max
QPSK
Viterbi +
Reed-
Solomon
1/2
1 45
0.921569 0.921569
41.470588
2/3 1.228758
1.228758
55.294118
3/5 1.382353
1.382353
62.205882
5/6 1.535948
1.535948
69.117647
7/8 1.612745
1.612745
72.573529
Table 5-3. Rx Symbol Rate / Data Rate Range – DVB-S2 Normal FECFrame = 64,800 Bits
De-
modulation
FEC
Code
Inner
Code
Rate
Symbol Rate
(Msps)
Spectral
Efficiency
Pilot OFF
Data Rate (Mbps)
Pilot OFF
Spectral
Efficiency
Pilot ON
Data Rate (Mbps)
Pilot ON
Min
Max
Min
Max
Min
Max
QPSK
LDPC+
BCH
1/2
1 62
0.988858 0.988858
61.309196
0.965327 0.965327 59.850274
3/5 1.188304
1.188304
73.674848 1.160026 1.160026 71.921612
2/3 1.322253
1.322253
81.979686 1.290788 1.290788 80.028856
3/4 1.487473
1.487473
92.223326 1.452076 1.452076 90.028712
4/5 1.587196
1.587196
98.406152 1.549426 1.549426 96.064412
5/6 1.654663
1.654663
102.589106 1.615288 1.615288 100.147856
8/9 1.766451
1.766451
109.519962 1.724416 1.724416 106.913792
9/10 1.788612
1.788612
110.893944 1.746049 1.746049 108.255038
8PSK
LDPC+
BCH
3/5
1 62
1.779991 1.779991
110.359442
1.739569 1.739569 107.853278
2/3 1.980636
1.980636
122.799432 1.935658 1.935658 120.010796
3/4 2.228124
2.228124
138.143688 2.177525 2.177525 135.006550
5/6 2.478562
2.478562
153.670844 2.422276 2.422276 150.181112
8/9 2.646012
2.646012
164.052744 2.585924 2.585924 160.327288
9/10 2.679207
2.679207
166.110834 2.618365 2.618365 162.338630
16APSK
LDPC+
BCH
2/3
1 47
2.637201 2.637201
123.948447
2.574613 2.574613 121.006811
3/4 2.966728
2.966728
139.436216 2.896320 2.896320 136.127040
4/5 3.165623
3.165623
148.784281 3.090495 3.090495 145.253265
5/6 3.300184
3.300184
155.108648 3.221863 3.221863 151.427561
8/9 3.523143
3.523143
165.587721 3.439530 3.439530 161.657910
9/10 3.567342
3.567342
167.665074 3.482680 3.482680 163.685960
32APSK
LDPC+
BCH
3/4
1 38
3.703295 3.703295
140.725210
3.623332 3.623332 137.686616
4/5 3.951571
3.951571
150.159698 3.866247 3.866247 146.917386
5/6 4.119540
4.119540
156.542520 4.030589 4.030589 153.162382
8/9 4.397854
4.397854
167.118452 4.302894 4.302894 163.509972
9/10 4.453027
4.453027
169.215026 4.356875 4.356875 165.561250