HumanTechnik lisa Mode D'emploi page 11

Person call button
Pressing the person call button on
the RF doorbell transmitter direct
causes a signal to be triggered on
every receiver which is set to the
same radio channel as the transmit-
ter. The person 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 doorbell
cable is not connected.
Mains operation
You can also operate your RF door-
bell transmitter direct 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
The radio signals are designed to
have a range of 80 meters under opti-
mum conditions. The following conditi-
ons may result in a reduced range:
- Signal transmission through buil-
ding structures or vegeta tion
- Interference from TVs, computer
monitors and mobile phones.
Under certain circumstances, this
may prevent the receiver from func-
tioning 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 ra dio transmit-
ter, in order to achie ve the greatest
possible range from the radio trans-
mitter:
- The radio transmitter should not be
set up close to devices which emit
powerful interference signals, such
as TVs, computer monitors or
mobile phones.
- The radio transmitter should not be
placed on metallic objects, since
otherwise the radio range will be
restricted by metallic shielding.
English 11