Transmitting Digital Television Signals by Satellite - DVB-S/S2 - Digital Video and Audio Broadcasting Technology - page 255

work, care should be taken, therefore, to deactivate the satellite receiver
since otherwise a possible short circuit could damage the voltage supply
for the LNB.

V

H

LNB noise figure: 0.6 ... 1 dB,
gain: appr. 50 dB

10.7...12.75 GHz

H

950...
2050 MHz

X

BP LP

V

1st
Sat IF

9.75
GHz

10.6
GHz

Fig. 14.20. Outdoor unit - LNB

Carrier &
clock
recovery

1st
sat
IF
from
LNB

A A D

2

cos
Matched
filter

ZF1
ZF2

De
mapper

Viterbi
decoder

A A

D D

Covol.
de
inter
leaver

Reed
Solomon
de
coder

MPEG2 Energy

dispersal
removal

Base
band
interface

TS

Fig. 14.21. DVB-S receiver (without MPEG-2 decoder)