TechniSat GigaSystem 17/8 K - Handbuch (Seite 28)

4 Installation in buildings with one or two accommodation units
Assembly of small installations is simple, and does not require professional assi-
stance.
>
Please note that the levels of the satellite signals fed into the system should be of
approximately equal strength, this helps to ensure that the very good decoupling pro-
vided is not restricted. Consult your dealer if needed.
> We recommend a star-shaped installation, based either in the attic or in the centre
of the building. Without additional amplification, the cable length from LNB to antenna
sockets should not exceed 230 feet. At such long distances use the cable
CoaxSat2150 to connect to the socket.
> If larger distribution installations are involved, cascading with distribution by floors
has proven practical.
> If possible, set up the installation using empty cable feed tubes. Since cables are very
sensitive, you should arrange these as the end of the construction progress. If there
are bends in the cable feed tubes or long distances to bypass, install the cable imme-
diately.
> Do not bend the cables too sharply. Do not use force, or try to stretch the cables too
much.
> Install the equipment while it is not connected to the main power supply.
> Particularly where installations are fairly large, we recommend you check all cable for
short circuits before fitting the contacts, as this will avoid a time-consuming search for
faults later on.
> Ensure that the cables coming from the LNB’s are not crossed. For easy identificati-
on, we suggest you use MULTIMEDIA cable, and mark the appropriate ables with sui-
table coloured markers.
> A terminal resistor may not be fitted to any input connections not used.
> If you are looking for a particularly linear frequency graph for terrestrial distribution,
you can insert a 75-Ohm terminal resistor on any outputs not used.
> If you continue to use a switchable LNB, please ensure the voltage provided at the
LNB is still adequate (greater than 16,5V for the horizontal planes; greater than 11,5V
for the vertical planes)
> The energy-saving setting of the 17/8G can only be switched on if you have not
installed a cascading matrix ahead of it.
> Please try to ensure that terrestrial signals fed in are all of approximately the same
signal strength.
> Use of a pre-amplifier for the terrestrial signal is not required.
4.1 Selecting the outdoor unit / LNB’s
One will generally use four Quatro-LNB’s.
If you want to use a remaining LNB or to transfer a special combination of polarization pla-
nes, please refer to chapter 5.1.
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GigaSystem_17_8_deu_engl_23112011_3.qxp 28.11.2011 09:34 Seite 28