IT2200 Reader System with Multimode Capability Installation & Maintenance/Service Guide
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4. Continue driving the car through the lane until the tag stops beeping.
5. Mark the location where the tag stops beeping.
6. Repeat this process of driving slowly through the pattern first along the left
and then along the right curbs.
7. Mark the pattern start and stop locations.
8. Measure the start and stop points.
All measurements are made with respect to the antenna-mounting pipe. In a toll
lane, the light curtain is usually centered between the treadles 1.8 m (6 ft)
upstream of the antenna. Measurements can be made from the light curtain but,
when recording the distances, add or subtract the 1.8 m (6 ft) as appropriate so
that the dimensions represent the distance to the antenna. Distance
measurements past the antenna are recorded as negative numbers. An ideal
pattern in the center of the lane is 3 m (10 ft) before the antenna to 0.9 m (3 ft)
past the antenna, or +3 m to -0.9 m (+10 ft to -3 ft). These distances can vary
by ±0.3 m (1 ft) and still be acceptable. With the car driving along the sides of
the lane, the pattern can be up to 0.6 m (2 ft) shorter overall.
If the pattern is larger or smaller than optimum, increase or decrease the
attenuation in 1dB steps until the optimum pattern is obtained.
Vehicle-Mounted Tag Test Using ATA-Type Tag
Note: For the vehicle mounted tag test, you must mark the tag, not vehicle, location at
the point where the tag starts and stops reading (indicated by audible clicks on host
PC or beeper box).
1. Replace the IT2235 Tag with an ATA-type tag. Place the IT2235 Tag in an ESD
bag.
2. Mount an ATA-type tag on the inside of the vehicle’s windshield. The tag must be
at least 5 cm (2 in) from the windshield frame or rear view mirror post, and it
must be below the tint line at the top of the windshield.
3. Drive the car at a speed of about 8 to 16 km/h (5 to 10 mph) through the center
of the lane.
4. Use a piece of masking tape on the road or curb to mark the location in the
lane where the tag starts to beep.
Note: For Step 5, you must either enable sound on the host PC or use a beeper box to
hear the audible clicks when the ATA tag is read.
5. Continue driving the car through the lane until the host PC or beeper box
stops clicking, indicating the end of the read zone.
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