The Radio System - AVS Electronics SAT W Mode D'emploi

The Radio System

Here below follow the special features which make the system reliable and efficient.
Especially:
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Double / Single Frequency on new European range
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Frequency Modulation (FM)
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Use of owner code
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Redundance in messages transmission
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Supervision of the system with programmable window
Any emitter is supplied by a 3 V battery (lithium battery is suggested) which usually grants from
1 to 2 years autonomy and is programmed to give indication of low-battery to the extension
board in advance, before total discharge. Moreover, in order to save energy, movement
detectors can work in a "save" mode which allows transmission of the alarms only after 3
minutes of total quiet in the room so that detectors installed in crowded rooms are blocked and
do not send useless transmission.
Propagation of radio waves in rooms with plenty of obstacles such as walls, furniture, metal
shapes etc. is subject to a physical phenomenon which creates zones with a better signal and
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"shadow-zones" where signal is very low or absent. This occurs because the signals irradiated
by the same transmitter, reflected in a different way, can cancel each other.
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It is very important to respect following rules during installation:
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Extension board must be installed as close as possible to the centre of the protected
area;
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If the building is multi-floor, avoid installation in the cellar, the garage and the peripherical
areas; give preference to medium or top floors in equidistant position from the detectors;
•
Do not install receiver into boards especially if metal boards and keep a right distance
from metal shapes, from walls and concrete; the same for detectors;
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Avoid installing extension board close to the floor, always maintain an adequate height ,
1,5 m at least. As general rule, please note that the higher will the extension board be
installed, the higher will be the action ray;
•
Before fixing detectors in the chosen position, check the level of the signal received by
the extension board, following procedure description in paragraph "Test of Power";
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When the level of the signal of a transmitter is not enough, please put the transmitter as
close as possible to the extension board;
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Do not install other devices near to the extension board.
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