User's Manual

General Guidelines
7-8 Troubleshooting
Excitation field generated
by the Exciter is below
Specifications.
LF Transmitter
Output is low (V
TAP
<
80 V
pp
).
The LF antenna loop has a
loose connection, or the LF
antenna is detuned by a
metallic object.
1. Check whether the LF antenna wires are
connected to the terminal block (See
LF
Antenna Connections on page 3-3).
2. Check the 3-wire connection between the
LF antenna terminal block and the
EXT95SC assembly (terminal block
TB2).
3. Check whether the recommended setup
guidelines for the Exciter’s location are
met. Pay special attention to metallic
surfaces surrounding the Exciter, short-
circuit loops, and the spacing between
adjacent Exciters.
The Exciter responds with
C9 at the Self-Diagnostic
Procedure.
Exciter k responds
with C9 at the
command:
:TEST:EXCITER k
sent by the Main PC
(k is the Exciter’s
address).
A faulty Exciter or a loose
connection in the power
cable or communication
cable between the Reader
and the Exciter.
A large magnetic coupling
between 2 adjacent Exciter
EX21 frames
The LF antenna is detuned
by metallic objects that are in
close proximity.
1. Check the power cable and the
communication cable between the Reader
and the Exciter.
2. Check the Exciter’s address setting.
3. Check the LF Transmitter’s output. (See
LF Antenna Connections on page 3-3).
1. Check the Exciter’s TAP voltage. (See LF
Transmitter Output on page 5-7).
2. Reposition the EX21 frames to minimize
the unwanted modulation; the amplitude
of V
TAPm in
> 60 V
pp
.
1. Check the Exciter’s V
TAP
.
2. Reposition the EX21 frames to minimize
the detuning; the amplitude of
V
TAP
> 80 V
pp
.
Problem Symptom Probable Cause Solution