Selecting The Installation Site - Kathrein CAS 80gr Bedienungsanleitung

Selecting the installation site

It is essential to select the correct installation site. This determines whether your parabolic antenna can be erected safely and
perform to its optimum capabilities.
When selecting the installation site, take account of special features of the structure of the building. If the installation is at the
edge of the roof or the building or on a cylindrical structure, DIN 1055, parts 4 and 4131 specifi es the increased wind and vibration
loadings that should be allowed for. The dynamic properties of the antenna and the structure can mutually infl uence each other
and cause detrimental changes.
Disregarding these considerations can lead to the maximum load or vibration fatigue stress listed in the Technical Data being
exceeded. The parabolic antenna need not necessarily be mounted on the roof, since the requirement is not height as such
but an unobstructed "view" of the satellite. For this reason, an appropriate installation site might also be found for instance
in the garden, on the terrace, on the face of the building or on a garage.
In fact if other sites are possible, it is better to avoid the roof. This will result in less work for you and will reduce the hazards
associated with installation work on the roof!
• For good reception, an unobstructed "view" to the south
(+/- 20°) must be ensured, at an elevation of about 30°. The
following satellites are then available for selection:
1 TÜRKSAT 42° East
*)
28.2° East
2 ASTRA 2 group *)
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
parabolic 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
weather the signal is lost altogether.
The reception is dependent upon the respective location and the
*)
satellite 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 designed
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 60 or
ZAS 61 wall supports.
• For mast installation on a roof, the mast must be clamped
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. Suffi cient cognizance of the maximum loading is achieved
if you arrange your antenna system as shown in example
bottom right and use conventional domestic antennas
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
Centre of the
Reflektormitte
refl ector