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Technical Specification
Table B.20 shows the Eb/No requirements for DVB-S and Table B.21 for DVB-S2
Es/No requirements to ensure error-free demodulation for all supported FEC rates.
Table B.20 DVB-S2 Satellite Input – DVB-S Eb/No Ratio
Convolutional FEC
Rate
1/2
2/3
3/4
5/6
7/8
Eb/No ratio is referred to user bit rate Ru188. See EN 300 421 specification. For
more detailed specification information and advice on performance in specific
applications, please contact Ericsson Customer Services.
Table B.21 DVB-S2 Satellite Input – DVB-S2 Es/No Ratio
LDPC FEC Rate
1/2 QPSK
3/5 QPSK
2/3 QPSK
3/4 QPSK
4/5 QPSK
5/6 QPSK
8/9 QPSK
9/10 QPSK
3/5 8PSK
2/3 8PSK
3/4 8PSK
5/6 8PSK
8/9 8PSK
9/10 8PSK
For more detailed specification information and advice on performance in specific
applications, please contact Ericsson Customer Services.
6
Add 0.2 dB (0.4 dB for FEC 3/5) to any system calculation for modulator – demodulator implementation margin
B-20
Eb/No Ratio (dB) in IF Loop for correct MPEG-2
system operation
4.5
5.0
5.5
6.0
6.4
DVB-S2 Theoretical
linear channel for correct MPEG-2 system operation
1.00
2.23
3.10
4.03
4.68
5.18
6.20
6.42
5.50
6.62
7.91
9.35
10.69
10.98
Es/No Ratio (dB) in perfect
6
EN/LZT 790 0005 R7A
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