
Troubleshooting the System
86
750.001.003
Revised June 1999
© 1999 AXCESS
TM
Inc.
Check the Site
Step 1:
Ensure that there are no other sources of similar radio
frequencies nearby. Proximity card readers and clicker
systems can affect the NT132 system, as can radio-
controlled sprinkler systems and military-grade
communications systems.
Step 2:
Determine if metal is attenuating the signal. If a Road Loop
is mounted in concrete, rebar can impact performance. If a
Dipole Antenna is mounted less than six inches away from
metal, it will lose reception range. If the antennas are too
close to metal, move them away.
Step 3:
Check the cable lengths – there should be a maximum of
80 feet between the Reader and the ATU and 20 feet
between the ATU and antennas. If the cables are too long,
they will need to be shortened.
Step 4:
Ensure that the system is protected from the elements.
Exposed equipment should be waterproofed.
Trace the Cables
Step 1:
Trace the cable from the transmitting antenna to the
TX
ANTENNA
connector on the ATU.
Step 2:
Trace the cable from the
TX Reader
connector on the
ATU to the
TX
connector on the Reader.
Step 3:
Trace the cable from the receiving antenna to the
RX
ANTENNA
connector on the ATU
Step 4:
Trace the cable from the
RX Reader
connector on the
ATU to the
RX
connector on the Reader.
Check the Connectors
Step 1:
Ensure that the connectors are not free spinning.
Step 2:
Replace any connectors on cables that freely spin.