HumanTechnik lisa Mode D'emploi page 11

of the battery compartment, to the
required channel number. All trans-
mitters and receivers must be set to
the same channel.
Radio range
Note the following points when
using the RF Repeater:
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 devices which
emit powerful interference sig-
nals, such as TVs, computer moni-
tors or mobile phones.
- The radio transmitter should not
be placed on metallic objects,
since otherwise the radio range
will be restricted by metallic
shielding.
- Position the radio transmitter
as close to the centre of the
building as possible, at a medium
height in the room.
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