HumanTechnik Lisa Instrucciones De Servicio página 11

RF alarm transmitter (alarm accesso-
ries socket).
Mains operation
You can also operate your RF alarm
transmitter direct via the plug-in pow-
er supply unit (A-2992-0).
To connect the PSU, insert the con-
nector 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
The radio signals are designed to
have a range of 80 meters under op-
timum conditions.The following condi-
tions 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 func-
tioning at all.
- Positioning of the transmitter at an
unfavourable distance from sur-
faces, 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, the-
re 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 transmitter, in
order to achieve the greatest possible
range from the radio transmitter:
- The transmitter should not be set up
close to devices which emit power-
ful interference signals, such as TVs,
computer monitors or mobile phones.
- The radio transmitter should not be
placed near metallic objects, since
otherwise the radio range will be re-
stricted by metallic shielding.
English 11