Microwave barrier
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the operating signal – specifically, of the frequency channel – in order to eliminate possible mutual
interference of adjacent detectors. It is therefore possible to set up multiple detectors in parallel.
The detector addresses a malfunction by disconnecting the outputs of the terminal control relay until the
elimination of the malfunction when:
−
a random, unanticipated chance malfunction occurs at the transmitter unit or receiver
unit;
−
an act of sabotage of the signal emission of the transmitter unit or of the signal
reception of the receiver unit is attempted by the deliberate employment of radio-
reflecting, radio-absorbing or other signal-interfering or signal-manipulating
materials
or devices, or by the deliberate severance of its power supply.
Further, the LEDs of the operational receiver unit will provide an additional visual indication by
flashing momentarily under the following circumstances:
-
if an alarm signal is generated, the LEDs will flash for 5 seconds;
-
if a lack of adequate signal strength is detected, an outage of the transmitter unit or
receiver unit is detected, interference with the signal by a powerful source of radio
noise is detected, and in certain other instances, the LEDs will flash for more than
30 seconds.
The detector is protected against possible reverse polarity of the supply voltage due to faulty installation,
and against spikes with a voltage up to 1000 V of up to 1 ms generated in power lines during storms.
It is recommended that the electric supply of the detector come from a stabilized source of constant
current with a nominal voltage from 12-36 VDC at a fluctuation not higher than 0.1V.
