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Pulling off the backing foil.
Plugging in the microphone cable and
sticking the microphone over the acou-
stic output cover of your doorbell.
Call button
Pressing the call button on the
combi II RF causes a signal to be
triggered on every receiver which is
set to the same radio channel as the
transmitter. The call button lamp
lights up to indicate this. This makes
it possible to call people who are in
different rooms. Also, this button
can be used for checking the system
is functioning even when the micro-
phone cable is not connected.
Mains operation
You can also operate your combi II
RF via the plug-in power supply unit.
To connect the PSU, insert the
connector on the end of the PSU
cable into the corresponding socket
on the left-hand side of the device.
Then plug the power supply unit into
the normal 230 V socket in your
house.
Radio range
Note the following points when
using the combi II RF:
The radio signals are designed to
have a range of 80 meters under
optimum conditions.
The following conditions may result
in a reduced range:
- Signal transmission through buil
ding structures or vegetation
- Interference from TVs, computer
monitors and mobile phones.
Under certain circumstances, this
may prevent the receiver from
functioning at all.
- Positioning of the transmitter at an
unfavourable distance from surfa-
ces which reflect radio waves, for
example floors and walls.
This may lead to the signal wave
being weakened or even cancelled
out by the reflected wave.
- Metallic objects reduce the range
due to the shielding effect of the
metal.
- Particularly in towns and cities,
there may be many other sources
of radio waves which can disrupt
the original signal.
- Having units operating at similar
frequencies located close to one
another may also result in mutual
interference.
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