TransCore Amtech IT2200, Инструкция по установке, обслуживанию и ремонту, Страница: 105 / 204

Tuning the Lane
5-15
6. Mark the location where the tag stops beeping. Ensure that you mark the tag,
not vehicle, location.
7. Repeat this process of driving slowly through the pattern first along the left
and then along the right curbs.
8. Measure the ATA tag footprint.
Pay close attention to the point of the first read. You may find that the first read
point for the ATA tag differs from the first read point of the IT2235 Tag. If this
difference is undesirable, you can adjust the ATA tag range independent of the
IT2235 Tag read range by changing the uplink attenuation. ATA tags respond to
uplink RF power only; the IT2235 Tag response is relatively independent of
uplink power.
To increase the ATA footprint, increase the uplink power. To decrease the ATA
footprint, decrease the uplink power.
Once the ATA and IT2235 footprints have been matched to a satisfactory degree,
recheck the IT2235 Tag footprint to ensure that the ATA adjustments have not
adversely affected the IT2235 footprint.
Dynamic Performance Test
This test evaluates the host computer performance for continuous reads of a tag in the
field.
Starting the Dynamic Performance Test
1. From the Reader menu, select Download CAM File. Select the
HDSKS.cam file. When the HDSKS.cam file has been successfully
downloaded, an information box appears indicating that the CAM file is
loaded into the reader logic card. Click OK to exit this screen.
2. From the Reader menu, select CAM Sequencing. When the CAM
Sequencing screen appears, select Non-Virtual Sequence. This command
initiates the host-reader interaction for this type of CAM file.
3. From the Reader menu, select Tag Command Mode. When the Tag
Command Mode screen appears, select Process Autonomous Commands.
When the Process Autonomous Commands screen appears, select Disable
Response Display, then click Run.
The CAM file issues continuous reads to any tag in the field, and the host
software counts the transactions. This is a very useful index of dynamic lane
performance.