Lnb Skew Angle; Adjust Skew Angle - Caratec CASAT4065 User Manual

4. LNB Skew Angle

4.1 Adjust Skew Angle

Satellites transmit signals on two (horizontal and vertical) polarisations which are orthogonal between each other.
In order to optimise signal reception, the receiving element Converter/LNB, which is mounted on the parabolic antenna,
must be positioned to be perfectly aligned with the transmitted signals. When this does not happen, because of a
different geographical position, the Converter/LNB must be rotated, "Skew angle", in order to optimise its alignment
with the signals it is receiving (fig. 15).
A typical example of this situation is the reception of the following satellites: Astra 28,5E, Astra 19,2E or HotBird 13E
in countries like Portugal, Morocco, Turkey or in Eastern European countries.
The Converter/LNB has been installed on the antenna in a position that is suitable for allowing the correct reception of
the main satellites in most European countries.
ATTENTION: The rotation of the LNB must not be changed if the vehicle stays in the same geographic area and you
are receiving your signal from the same satellite.
0°
fig. 15
11
16
21
26
To determine the adjustment parameters of the Skew angle for the LNB, identify your position in the map of Europe
and choose the corresponding parameters in the LNB Skew Table onthe next page.
1 2
6 7
12
17
22
27
To access the LNB converter, remove the
protective plastic covers by unscrewing the
three parametric screws.
is adjusted, if the vehicle stays in the same
geographic area and is receiving the same
satellite signal, we recommend that you screw
that protective plastic covers back on.
3 4
8 9
13 14
18 19
23 24
28 29
Once the skew
Europe map
5
10
15
20
25
30
15