Kathrein CAS 90gr Handbuch Seite 13

● For good reception, an unobstructed "view" to the south (+/-
20°) must be ensured, at an elevation of about 30°. The fol-
lowing satellites are then available for selection:
1 TÜRKSAT 42° East
*)
2 ASTRA 2 group 28.2° East
*)
3 ASTRA 3 group 23.5° East
4 ASTRA 1 group 19.2° East
5 EUTELSAT W 2 16° East
● Do make sure that there are no obstacles between the para-
bolic antenna and the respective satellite (such as trees,
roofs, house eaves or other antennas). Such items can impair
reception to the extent that during unfavourable stormy wea-
ther the signal is lost altogether.
*) The reception is dependent upon the respective location and the satel-
lite coverage zone
Installing the Antenna
When installing the antenna carrier (mast or wall boom), ensure
that it is standing upright. Otherwise, there may be problems
with the alignment of the antenna to the satellites.
a. Requirements on the antenna carrier
– Use only masts or support tubes that are specially desi-
gned for installation of antennas. Other tubes generally
do not have the strength required to withstand the forces
of wind and weather.
– For mast installation, select a tube diameter between 48
and 90 mm, with a wall thickness at least 2 mm. For wall
installation, Kathrein recommends the use of ZAS 62 or
ZAS 63 wall supports.
– For mast installation on a roof, the mast must be clam-
ped for at least 1/6 of its free length (in the example
bottom right this is 0.7 m).
b. Several antennas on a single antenna carrier
Install the parabolic antenna as far down the mast as
–
possible, so as to minimise the bending moment at the
clamping point.
– Under no circumstances exceed the maximum value for
the loading on the mast or mast support, as stated in the
Technical Data. Sufficient cognizance of the maximum
loading is achieved if you arrange your antenna system
as shown in example bottom right and use conventional
domestic antennas together with mast components from
a specialist supplier (tube in steel grade St 52 with out-
side diameter 60 mm and wall thickness 2.5 mm at the
mast clamping point – e.g. ZSH 59 from Kathrein).
If you arrange the structure differently you must calculate wind loading and bending moment at the clamping
point as specified in DIN EN 60728-11 (or have a specialist do the calculation for you).
6 EUTELSAT 13° East
HOTBIRD
7 EUTELSAT W 1 10° East
8 HISPA-Sat 30° West
East
Ø 48-90 mm
13 / 36
South
West
VHF
3.5 m
3.0 m
2.0 m
Centre of the
Reflektormitte
reflector
min. 0.7 m