TRANSIT Ultimate | installation guide
32/40
6.5
Read range control
The read range of the TRANSIT Ultimate can be controlled with the embedded squelch function. The squelch
references the received signal strength against the squelch level threshold. When the received signal strength is below
the squelch threshold level no identification is possible. The received signal strength becomes higher when the
transponder comes closer to the reader. When the received signal strength exceeds the squelch threshold level the
transponder will be identified.
Figure 26: Squelch principle
Adjustment of the read range is done by enabling the squelch and setting the squelch level with its potentiometer.
For maximum read range, disable the squelch function completely with the enable/disable squelch switch.
LED SQ-ACT is on to indicate that the squelch is enabled.
LED SQ-ACT is on when the transponder signal is below the squelch level (red area in Figure 26).
ON
1 2 3 4
SW2
ON
1 2 3 4
SW3
Squelch enabled
ON
1 2 3 4
SW2
ON
1 2 3 4
SW3
Squelch disabled (max. read range)
SQ-Level potentiometer clockwise
Long read range.
SQ-Level potentiometer counter-clockwise
Short read range.
Figure 27: Squelch controls
Distance
Rec
ei
ve
d s
ig
na
l s
tr
en
gth
0 m
5 m
max read range
for this level
squelch level setting
Tag signal < squelch level: no read
Tag signal > squelch level: read
Squelch level
Tag signal
leds
potentiometer
dip-switch
