How to ensure the best
possible radio connection
Align all aerials of the
transmitters and receivers
vertically or all horizontally
to the greatest extent
possible.
The length of aerials may
not be changed, as they
are perfectly matched
to the wavelength of the
frequency.
Maintain the greatest
possible distance (several
decimetres) to larger metal
surfaces, e.g. metal doors
and frames, aluminium
blinds or metal cabinets.
A minimum distance of
10 cm is to be maintained
between two receivers.
A minimum distance of
30 cm is to be maintained
between transmitter and
receiver.
Maintain a minimum
distance of 50 cm to
electronic devices, e.g.
motors, electronic ballasts
or Tronic transformers.
Radio components of
other function groups,
e.g. radio headphones
or cordless telephones,
must be kept at least
3 m away.
How to select a suitable
mounting site
Check the planned system
in the building with the
respective devices, e.g.
from the radio presenta-
tion case, for a reliable
radio connection before
using radio components.
Take the state of construc-
tion of the building into
account here, e.g. the
degree of drying out off
plaster and screed or the
existing doors and armour
or hangings of the win-
dows.
Do not mount the trans-
mitters and receivers near
the ground and observe
a minimum installation
height of 0.5 m.
Transmitters and receivers
are not to be installed be-
hind metal or conductive
surfaces, such as anti-sta-
tic floors, sounding with
metal cladding, cable
lines, metal louvered ceil-
ings and hot-water and
electrical floor heating.
To correct irregular recep-
tion, it is often sufficient
to move the transmitter
or receiver a few cen-
timetres. This reception
interference can often
occur due to shadowing,
obliteration, or reflections
of the radio signal as
sometimes occur with
car radios and mobile
telephones, for example.
How to ensure secure
radio signal transmission
To avoid telegram overlap-
ping, do not operate other
radio transmitters with
radio receivers.
To avoid telegram over-
lapping, repeat a radio
telegram only via a repea-
ter within a “radio zone”.
The repeater is to be in-
stalled in a sensible place,
i.e. halfway between the
transmitter and receiver.
No more than eight
presence detectors may
be used within a “radio
zone”. With constant
presence in all detection
areas of these signallers,
the radio channel could
be heavily burdened due
to the high frequency of
telegrams from the pre-
sence detectors.
Product-specific aspects
for secure radio signal
transmission
Radio presence detector:
Please use only alkaline
batteries to operate the
radio presence detector,
as only these have suffi-
cient pulse current capa-
city.
Multi-purpose transmitter:
Please extend push button
cables only with paired
cables for each input
and with a cross section
of approx. 0.2 mm
2
to
max. 5 m. Insulate unused
cables.
Repeater:
Please install the device
as close as possible to the
middle of the distance
between the transmitters
and receivers and not near
other transmitters or re-
ceivers. Please maintain
a minimum distance of
1 m to prevent overampli-
fication.
Tips and planning information.
23
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