Service; Reception Practice - Obstacles In Front Of The Satellite System; Reception In Distant Countries - Ten-Haaft Oyster Premium 65 Instructions For Use Manual

3. SERVICE

3.1 Reception practice - obstacles in front of the satellite system

All satellites are located above the equator, i.e. in the south from Europe; therefore always ensure a clear view
in southern directions.
Depending on where you are and the elevation of your satellite system, obstacles of varying heights may obstruct
reception.
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
12
At 28° elevation (northern Germany):
At 28° elevation (northern Germany):
A tree over 5 metres high at a distance
A tree over 5 metres high at a distance
of 10 metres does not usually interfere
of 10 metres does not usually interfere
with reception.
with reception.
28°
28°
10 Metres
10 Metres
3. SERVICE

3.2 Reception in distant countries

SKEW ANGLE ("POLARIZATION MISALIGNMENT ANGLE")
For the best possible reception in the peripheral areas of the south-western and south-eastern holiday regions,
it makes sense to turn the LNB in the corresponding cardinal direction. This compensates for the polarization
misalignment angle which is caused by the earth curvature.
The Oyster® is available with and without automatic Skew. The Oyster® with SKEW option automatically carries
At 16° elevation (Northern Europe):
At 16° elevation (Northern Europe):
out the following settings.
A tree with a height of only 3 metres
A tree with a height of only 3 metres
at a distance of 10 metres can already
at a distance of 10 metres can already
This chapter describes how to carry out an LNB readjustment to optimise reception in the peripheral areas of the
interfere with reception.
interfere with reception.
coverage of TV satellites. Loosen the LNB screw connection for this and rotate the LNB by a certain angle. This
optimisation is only necessary in peripheral areas. We recommend this only to technically experienced persons.
All satellites that transmit a programme of interest to Central Europeans target Central Europe. So if the receiv-
ing system is outside this area, the antenna will look 'from the side' at the satellite. This effect is called "Skew
angle" or "polarization misalignment angle" and occurs particularly in areas such as Portugal, southern Spain,
16° Morocco, Greece, Turkey, and extremely on the Canary Islands. The receiver electronics usually compensate for
16°
this effect without further intervention, but in some cases 'some' manual help is required. This 'help' consists of
10 Metres
10 Metres turning the LNB (receiving head of the antenna) by a few degrees.
OYSTER® 65/85
Loosen screws
13