CIAS Elettronica S.r.l. Ed. 1.5
Installation Handbook Page 50 of 57 MANTA 50 – 80
•
Select one of the 16 modulation channel available, using the hexadecimal switch (between 0
and F). To increase the resistance to tampering, it is a good idea to preset different channels
for the different barriers installed on the same site. The use of different channels does not
affect the detection ability of the barrier. By setting the switch on channel F, if the barrier is in
channel alarm condition it would not generate the alarm event.
Remark
: if one RX receives a MW signal from its own transmitter and from another interfering
transmitter (for example due to reflections or any other field reason), it is necessary to
synchronize the two transmitters, selecting one as Master and the other as Slave. In this case
the modulation channel, for the slave transmitter, is the same as selected on the Master,
regardless its own selection. Before connecting
synchronization wires each barrier must be
aligned individually. Ensure that the transmitter of the barrier
not
being aligned is powered
down.
4.1.2 Receiver Set-up
•
To remove the radome unscrew the 3 screws until loose, then release them gently without
removing them completely. Separate the radome from the bottom, this operation will cause the
open of "Tamper" microswitch on PCB.
•
Check the D.C. power voltage (13.8V ) at terminals 1 and 2 on terminal block MS2 (Fig. 9)
a. Ensure that the tamper switch
S2
is activated (Open circuit)
b. Select
position 1
on the “function switch”
SW1
. The electronic alignment phase is activated
c. Push
S3
button. This action acquires the signal level and freezes the Automatic Gain Control
after a few seconds, In this condition the buzzer BZ1 produces a pulsed sound. This means
that the received field signal has reached the proper working level
d. Gently unscrew the bracket screws and move the horizontal alignment of the receiver, looking
for the maximum received signal
e. If, during the alignment, the pulse frequency of the buzzer, increases, this means that the
received signal level is increased compared to the previous level. In this case, push the button
S3 again and when the pulse frequency of the buzzer becomes lower (proper working level),
move the head horizontally in the same direction.
If during the alignment, the pulse frequency of the buzzer decreases, this means that the
received signal level is decreased compared to the previous level and so it is necessary to
move back in the other horizontal direction to look for a better received signal. If there is no
new maximum level this means that the present horizontal alignment is the best position.
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