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Appendix A
Technical Specifications
Parameter
Eb/No (C/N) Ratio
DVB-S2 Modulation (EN 302 307)
Modulation
Pilots On/Off
QPSK LDPC FEC Rates
8PSK LDPC FEC Rates
LDPC FEC Frame Length
Symbol Rate Range
Maximum Channel Bit Rate
Maximum User Bit Rate
DVB-S Eb/No (C/N) Ratio
Convolutional FEC Rate Eb/No Ratio (dB) in
1/2
2/3
3/4
5/6
7/8
C/N = Eb/No + 10 log (2 x FEC X 188/204)
The D9854/D9854-I receiver displays the C/N Ratio.
DVB-S2 Error Rate Performance Es/No (C/N) Ratio
Mode
QPSK 1/2
QPSK 3/5
QPSK 2/3
QPSK 3/4
374
Specification
See DVB-S2 Satellite Receiver Input, DVB-S
Eb/No (C/N) Ratio Table
QPSK, 8PSK
Pilots On
1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 8/9, 9/10
3/5, 2/3, 3/4, 5/6, 8/9, 9/10
Normal
1 to 30 Ms/s
90 Mb/s
78.55 Mb/s
Linear Channel and IF
Loop configuration
4.5
5.0
5.5
6.0
6.4
Simulated Es/No (dB) for
FEC Frame length = 64,800
1.00
2.23
3.10
4.03
C/N at DVB Threshold
(BW = Symbol Rate)
4.1
5.9
6.9
7.9
8.5
Typical Performance (dB) in
Linear Channel and IF Loop
configuration
1.2
2.4
3.2
4.2
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