Technical information

will impede transmission of the
radio signal through the wall.
In this case the signal may be
diverted to door surfaces or
wooden beams for the room-to-
room transmission.
Intermediate ceilings.
When
installing components in interme-
diate ceilings it must be ensured
that no panels that are made of
metal or which incorporate car-
bon fibres have been used. Such
panels significantly interfere with
transmission from or into the hol-
low ceiling space.
High-frequency interference.
Computer, audi
o/video systems,
microwaves, electronic trans-
formers and electronic ballast are
sources of high-frequency inter-
ference. Maintain a distance of at
least 0.5 m from such devices.
Avoiding attenuation. The con-
necting line between the radio
transmitter and the radio receiver
should be selected so that any
path through masonry or other
attenuating materials is as short
as possible (see illustration below).
It is particularly important to avoid
niches in walls, since they interfere
with propagation of radio waves.
Building-wide transmission of
signals. Transmitters or receivers
that perform master functions
throughout the building (e. g.
master OFF, master shutter control)
should be in a central location.
Avoid disadvantageous transmis-
sion paths that run diagonally
through the entire building.
Signal amplification. The radio
signal amplifier can be used as
a repeater (approximately half
way along the transmission path)
if excessive attenuation prevents
error-free signal transmission.
To do this, the corresponding
transmitter must be taught to
the signal amplifier. The amplifier
receives the telegram from the
transmitter and resends it.
A repeater bit prevents the radio
signal amplifier from sending the
telegram multiple times uninten-
tionally. Only one radio signal
amplifier can be used between
any given radio transmitter and
radio receiver.
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