Automatic Setting Of The Lnb Skew - VDO SAA110287EA Manual De Instrucciones

2.5 Automatic setting of the LNB skew angle
(only models
345/445/360/460)
Signals transmitted in vertical(red) and horizontal(blue) wave offset exactly 90º from each
other. Since linear satellite signals are oriented in a precise cross pattern, the Ocean Line
antennas' receiving element, called an LNB (low-noise block) must be oriented in the
same way to optimize reception. This orientation adjustment is referred to as the LNB
"skew angle". Figure 2-4 illustrates how skew determines the amount of signal the LNB
collects. The more signal, the better reception.
Bad Skew
The correct skew setting varies depend on your geographic location, since the orientation
of your antenna to the satellite changes as you move. Ocean Line antennas are
automatically set by GPS and skew motor. GPS gives skew controller location information.
Then, skew controller command to skew motor. The skew motor changes the LNB angle
and hold on the LNB. If you move to other area, the skew angle may be changed.
with Auto-Skew
Figure 2-3 Satellite signals
Good Skew
Figure 2-4 Best Skew Angle
Satellite Antennas User Manual ver. 2.0
function Ocean
: LNB Converter
: Satellite Signal
Best Skew
Line
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