Kathrein CAS 90gr Handbuch Seite 16

● Multiple feed systems (multi-feed)
To optimise the multi-feed reception, the tiltable support
"H" should be tilted to the angle "V" according to the table
attached to this document.
The polarisation angle on the respective feed system must be
set according to the following formula.
PW = PW - V
NEW TAB
PW = polarisation angle to be set
NEW
PW = polarisation angle of the selected satellite according
TAB
to the table in the LNB user instructions
V = setting angle of the support according to the selected
satellite combination of the attached table
With the settings and the calculation, pay attention to
preceding signs!
In order to be able to tilt the support you must first use the
hexagon key to slacken the bolt shown arrowed in the illus-
tration on the right.
Aligning the Antenna
The antenna must be exactly aligned towards the satellite in
respect of both the direction (azimuth) and also the inclination
(elevation). For multi-feed applications the antenna should be ali-
gned towards the satellite which is transmitting the weakest
signal level.
a. Adjusting the inclination (elevation)
– Use the allen wrench (
antenna to slacken the two screws on each side of the
inclination scale (elevation) on the left and right of the
support.
Do not slacken the upper nuts (②) on the bra-
cket – these are factory-set to a fixed tighte-
ning torque.
– Then adjust the inclination (elevation) – the exact eleva-
tion angle for your location can be found in the manual for
the feed system (LNB).
– When doing this, retighten first just one of the bolts on the
inclination scale finger-tight (
b. Setting the direction (azimuth)
If you yourself are unable whilst performing the adjustments
to read the results of the alignment work on an antenna
meter or screen connected to the satellite receiver, you may
need an assistant for the following steps. The precise align-
ment of the antenna can be achieved only if a digital antenna
meter is used. Ask your dealer about this.
– Set the satellite receiver to a known channel so that you
can check that you have really "locked on" to the desired
satellite.
– Now slightly loosen the wing nuts on the mast clamp (
– Twist the antenna so that it faces roughly south. Then
slowly twist the antenna about its central axis to left and
right until the best reception is obtained for the selected
channel.
– Then tighten the wing nuts initially just enough to prevent
the antenna turning.
①
) supplied with the parabolic
①
).
0°
V = 0°
2
1
③
).
3
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Direction of rotation for
polarisation angle (PW)
Scale V angle
V = -20° V = +20°