Annex B

 

Table B.13 DVB-S2 Satellite Input – DVB-S2 Es/No Ratio

 

LDPC FEC RateDVB-S2 Theoretical5 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.4.1.2LNB 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.

5Add 0.2 dB (0.4 dB for FEC 3/5) to any system calculation for modulator – demodulator implementation margin

B-14

EN/LZT 790 0005 R1A