Encompass 4 Reader System Guide
8-22
To adjust the read zone by adjusting sensitivity range
1. Ensure that your PC is communicating with the Encompass 4 Reader using a
terminal emulation program as described in
“Verifying Communications” on
page 8-8.
2. Mark the current read zone as described in “Marking the Read Zone” on page 4-
38.
3. Enter command #01 to switch to command mode. You are prompted with
#DONE from the reader and can now enter reader commands.
4. Enter command #64318 or #64518 to decrease the range sensitivity seven
increments below the maximum (default). Press ENTER.
Note: In the command #643NN or #645NN, NN can be any hexadecimal
value from 00 to 1F. The reader’s receiver becomes less sensitive to tag signals as
the value of NN is lowered from the maximum sensitivity of 1F to the minimum
sensitivity of 00.
5. Verify that the read zone has decreased by moving the tag through the desired
read area. If the read zone is still too large, switch to command mode and enter
the command #64317 or #64517 to decrease the range another increment.
Continue increasing the NN value until the read zone matches the desired read
zone.
6. Follow the steps in section “Procedures” on page 4-39 to mark the new read zone
on the ground with the tape or chalk.
When the desired read zone is established, test the read zone with simulated and
real traffic by performing the following procedures.
To test the read zone
1. Ensure that the Encompass 4 Reader is in data mode.
2. With the Encompass 4 Reader running, place one tag behind your back while you
hold another tag in the new read zone. If a valid read, the data from the tag held in
the read zone displays on the PC screen.
3. Switch tags, placing the other tag behind your back and holding the first tag in
the read zone. If a valid read, the data from this tag held in the read zone displays
on the PC screen.
4. If both tags are read, you have successfully adjusted the read range. If one or both
tags did not read, follow the suggestions in
“Verifying Tag Read Capability” on
page 8-10.
5. As a last test, attach test tags to vehicles and simulate traffic going through the
read zone to verify that the system performs accurately in a live environment.
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