18
Fig.8.4
9. PREPARATION OF THE SENSOR FOR THE OPERATION AND
ALIGNMENT
9.1.
Sensor preparation for its operation
9.1.1.
Check the correctness of supply and output circuits connection.
9.2.
Alignment of Tx and Rx
9.2.1
. Align Tx and Rx antennas at the height of 0,5m.The height is measured from the
lower antenna edge to the ground (fig.6.1).
It is necessary to carry out rough and accurate Tx and Rx alignments to provide the
sensor operability.
9.2.2.
The rough alignment of Tx and Rx antennas:
-
loosen the buckle 4 with the locks 5 and unlock the nuts 8 (fig.6.1);
-
revolve the Tx (Rx) antennas with the brackets round the support, incline
the antennas vertically, then direct them at each other. Use the aiming plate
2, placed on the side of the antennas;
-
tighten the nuts 4, using the locks 5;
9.2.3.
The accurate tilt
alignment of Tx and Rx antennas:
-
switch on the sensor;
-
open the cover 14 of Rx (fig.6.1);
-
connect the voltmeter to the Rx socket «TEST» with the alarm cable from
the delivery kit with the aim to check the signal level received by Rx;
-
press the button «АGC».
Pressing it
and inclining vertically Tx and Rx,
find the maximum voltmeter indication.
-
ease the button «АGC».
-
check of the «TEST» voltage value after the alignment. If the «TEST»
voltage is less than 1,2 V, it is necessary to repeat the alignment vertically
and horizontally for more accurate alignment. The «TEST» voltage of 1,2
corresponds to the signal level margin of 15 dB. If the «TEST» voltage is
more than 4,5 V,
it is necessary to disalign Rx and Tx upwards at a
Summary of Contents for FORTEZA-300
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