Service; Reception In Practice - Aiming The Satellite System - Ten-Haaft OYSTER 60 Instructions For Use Manual

3. SERVICE

3.1 Reception in practice – aiming the satellite system
Satellite antennas are aimed at a satellite along three adjustment planes:
1. AZIMUTH ANGLE (COMPASS HEADING)
The azimuth angle defines the horizontal setting of the antenna, specifying the angle between North and anten-
na heading. It depends on the geographic position of the receiver and the satellite selected.
For example, Astra 1 (orbital position 19.2° East) has an azimuth of 173° in Berlin but 143° in southern Spain.
2. ELEVATION ANGLE (INCLINATION)
The elevation angle indicates the height of the satellite above the horizon. Like the azimuth angle, it depends
on the position of the receiver and the satellite selected. In Central Europe, it is typically between 25° to 35°,
decreasing as you move further North.
3. SKEW ANGLE (POLARISATION DEVIATION)
For optimal reception at the fringe of the satellites' footprints in southwestern and southeastern regions, the LNB
may have to be rotated to compensate for the polarisation deviation caused by the earth's curvature.
OBSTACLES IN FRONT OF THE ANTENNA
At 42° elevation (southern Spain): At 42° elevation (southern Spain):
A tree 9 metres high at a distance
A tree 9 metres high at a distance
of 10 metres does not interfere
of 10 metres does not interfere
with reception.
with reception.
42°
42°
10 metres 10 metres
At 16° elevation (Northern Europe):
A tree with a height of only 3 metres
at a distance of 10 metres can already
interfere with reception.
16°
10 metres
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At 28° elevation (northern Germany): At 28° elevation (northern Germany): At 16° elevation (Northern Europe):
At 16° elevation (Northern Europe):
A tree over 5 metres high at a distance A tree with a height of only 3 metres
A tree over 5 metres high at a distance A tree with a height of only 3 metres
of 10 metres does not usually interfere at a distance of 10 metres can already
of 10 metres does not usually interfere at a distance of 10 metres can already
with reception.
with reception. interfere with reception. interfere with reception.
28°
28°
10 metres 10 metres
3. SERVICE
3.2 Reception in distant countries
LNB SETTINGS IN DIFFERENT REGIONS:
This section describes how to fine-tune the LNB to optimise reception in the fringe of a TV satellite's footprint.
This requires loosening the LNB bolts and turning the LNB by a specific angle. This is only required in the fringe
areas of a satellite's footprint. It should be performed by expert users only.
All satellites broadcasting channels of interest to Central European viewers are aimed at Central Europe. In loca-
tions outside this area, the antenna has a "sideways view" on the satellite. This effect is known as the "SKEW an-
gle" or "polarisation angle" and occurs particularly in southern regions such as Portugal, Spain, Morocco, Greece,
Turkey, and most extremely on the Canary Islands. The effect is mostly compensated by the receiver's electronics,
but sometimes some manual fine-tuning is required by pivoting the LNB (reception head) by some degrees.
OYSTER® 60/80
16°
16°
10 metres
10 metres
Loosen the bolts
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