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TAMPER
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PB1
SW1
LED
LED
OFF
MICROWAVE BEAM
Models BM60M, BM120M, BM200M and BM60M WS are microwave intrusion detection systems,
whose principle of working is the “field-interruption”.Thanks to the microprocessor managing the
signals, they are the ideal instruments for protecting big surfaces, both indoor and outdoor, thus
granting a high security standard.
Chapter 1: General Description
The system is made by a Transmitter and a Receiver which must be installed as a couple,
choosing the same working frequency among the 5 available, in both units (tx and rx) ,
through SW1 (4 dip-switch module) on board.
Compatibility with existing models
In case of replacement, choose the same frequency on the beam to be replaced (F1 by F1, F3 by
F3 etc.). In order to identify the corresponding frequency, use the chart “BEAMS CHANNELS”
Filter of selection and compensation
Any receiver is equipped with a selection filter choosing only the frequency of its channel and
rejecting the others, thus not making possible the elusion of the beam in case of use of a false
transmitter. Special self-adjusting and signal-elaboration circuits have been used in the receiver
for automatic compensation of temperature variations.
Detection Area
The shape of the irradiation area is very well defined and this allows a higher possibility of
detection and a reduction of false alarms risk.
These beams are manufactured exclusively with solid-state components and are tropicalyzed in
order to obtain a very good seal against weather conditions.
Chapter 2: Transmitter
The transmitter is made of a planar microwave emitting a narrow and directional higly-stable low
power beam.
A 4-dip-switch for setting working frequency is on board.
Check that the transmitter working frequency set is
the same as in the receiver coupled
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