Lnb Switching Control - Hyundai HSS-730 Service Manual

HSS-730/830 & UFD505/515 SERVICE MANUAL
The following figure is an example of universal LNB.
RF Amp
Hor
10.70 ~ 11.70 GHz
and
11.70 ~ 12.75 GHz
Ver

3.3.3. LNB Switching Control

As shown in the below figure, the STB supports the following LNB switching methods
DiSEqC 1.2 (including the SMATV mode) Compliant (over DiSEqC 1.2 in future).
The switching type controlled by 14/18V DC.
The switching type controlled by 22kHz Tone.
The STB can Generates a DiSEqC command by modulating the 22kHz signal.
Satellite Dish
14/18V
RF Amp
Switch
Polarization Selection
9.75 GHz LO
IF Amp
LO
10.60 GHz
HDT DVB SATELLITE STB
STB
0/22kHz
Switch
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