- 9 - DSI 400
4 ConneCting the dsi 400
• Remove all protective films from the housing.
4.1 satellite signal
basiCs
Satellites signals are horizontally or vertically polarised and are transmitted
within 2 frequency ranges (high and low band). So 4 different ranges must be
received:
– Horizontally polarised, high band 11.70–12.75 GHz ("horizontal high")
– Horizontally polarised, low band 10.70–11.70 GHz ("horizontal low")
– Vertical polarised, high band 11.70–12.75 GHz ("vertical high")
– Vertical polarised, low band 10.70–11.70 GHz ("vertical low")
Dependent on the selected station, this four ranges must be transferred to the
receivers (satellite tuners). This is done by so called multiswitches, which are
part of the receiving system - separately or integrated in the LNB (signal con-
verter at the satellite antenna).
LNBs with integrated multiswitch are called Quad resp. Oct LNB (dependent
on the number of inputs).
LNBs without multiswitch are called Quattro LNB, which transfers the signals to
a separate multiswitch or directly to the DSI 400. For this connecting variant a
multiswitch is integrated in the DSI 400.
Only one client device can be connected to each output of a multiswitch (star
distribution). If several client devices are connected to one antenna cable a so
called "Unicable" receiving system must be used. Herein the reception signal
is converted in the multiswitch to a defined frequency for each client device.
4 satellite tuners – for 4 client devices – are integrated in the DSI 400.
Dependent on the satellite reception system 3 different connecting variants are
available.
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