BEWATOR COTAG 4101-2, Руководство по установке, Страница: 140 / 158

4101-2 Controller Installation Handbook
19-8
Low transmit range
(The 922 Test Card LED lights when closer to the antenna than
expected.)
Tx/Rx cables swapped
This is a very common fault which results in very low reading range.
Solution : check that the Tx feeder is not connected to the Rx antenna
and vice versa.
Loop antenna not tuned
Loop antennas must be tuned using a multimeter and the switches in
the Loop Coupler.
Solution : check that a loop antenna is correctly tuned (see the
chapter on “Antennas” for details).
Loop antenna installed near metal ( for example around a metal
door frame )
A loop antenna mounted on a metal surface can stop working
altogether.
Solution : check that there are no nearby large metal structures
which might reduce the Tx range. See the chapter on “Antennas” for
more information.
Low receive range with a reading head
(The 922 Test Card shows the correct Tx range but its LED does not
pulse showing that it is being read until it is close to the reading
head.)
With a reading head, this is an unlikely fault.
Bad connections
With a reading head, low receive range is usually a wiring fault.
Solution : check the connections. (Some Rx signal can reach the
Controller even if one half of the Rx pair is broken.)
Threshold potentiometer on RF module has been moved
This potentiaometer is factory set and marked.
Solution : check that the potentiometer on the RF Module is in its
factory-set position.