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Annex B
Table B.13 DVB-S2 Satellite Input – DVB-S2 Es/No Ratio
LDPC FEC Rate DVB-S2 Theoretical
5
Es/No Ratio (dB) in perfect
linear channel for correct MPEG-2 system operation
1/2 QPSK 1.00
3/5 QPSK 2.23
2/3 QPSK 3.10
3/4 QPSK 4.03
4/5 QPSK 4.68
5/6 QPSK 5.18
8/9 QPSK 6.20
9/10 QPSK 6.42
3/5 8PSK 5.50
2/3 8PSK 6.62
3/4 8PSK 7.91
5/6 8PSK 9.35
8/9 8PSK 10.69
9/10 8PSK 10.98
For more detailed specification information and advice on performance in specific
applications, please contact Ericsson Customer Services.
B.4.1.2 LNB Power and Control
The RX8000 Receiver provides LNB power and control signals through the active
RF input connector. LNB power and controls are enabled through the Satellite Input
Menu.
The RX8000 Receiver supports voltage controlled LNBs only. The LNB power circuit
provides automatic protection against short circuits in the LNB or its cable. When the
short circuit has been removed recovery is automatic. Switchable boost of the LNB
voltage to allow for losses in long cables and control of 22 kHz tone insertion are
provided. The LNB power characteristics comply with IEC 1319-1 and are as per
Table B.14.
5
Add 0.2 dB (0.4 dB for FEC 3/5) to any system calculation for modulator – demodulator implementation margin
EN/LZT 790 0005 R1A
B-14