HumanTechnik lisa Instrucciones De Servicio página 11

Call button
Pressing the call button on the door-
bell transmitter acoustic causes a
signal to be triggered on every recei-
ver 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 microphone cable is
not connected.
Mains operation
You can also operate your doorbell
transmitter acoustic via the plug-in
power supply unit. To connect the
PSU, insert the connector on the end
of the PSU cable into the correspon-
ding socket on the left-hand side of
the device. Then plug the power sup-
ply unit into the normal 230 V socket
in your house.
Radio range
Note the following points when
using the doorbell transmitter acou-
stic:
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.
Positioning the radio
transmitter
Bear in mind the following points
when positioning the radio transmit-
ter, in order to achieve the greatest
possible range from the radio trans-
mitter:
- The radio transmitter should
not be set up close to devi-
ces which emit powerful
interference signals, such as
TVs, computer monitors or
mobile phones.
English 11