TransCore 05531 User Manual
Encompass 4/4800 Multiprotocol Reader System Guide
8-22
Fine-tuning the Read Zone by Adjusting Sensitivity Range
The Encompass 4/4800 Multiprotocol Reader read zone can be fine-tuned by using
command #643NN for ATA tag read mode or #645NN for Intellitag-based eGo tag
read mode to reprogram the RF sensitivity range. Sensitivity range adjustments have
less impact on the read pattern than RF power adjustment, thus RF power adjustment
should be used as the main read pattern adjustment tool. Sensitivity range control may
be helpful in stopping some tag reads on the very edges of the read pattern. To produce
a noticeable change in the read pattern, you must decrease the range sensitivity by
more than one increment.
command #643NN for ATA tag read mode or #645NN for Intellitag-based eGo tag
read mode to reprogram the RF sensitivity range. Sensitivity range adjustments have
less impact on the read pattern than RF power adjustment, thus RF power adjustment
should be used as the main read pattern adjustment tool. Sensitivity range control may
be helpful in stopping some tag reads on the very edges of the read pattern. To produce
a noticeable change in the read pattern, you must decrease the range sensitivity by
more than one increment.
To adjust the read zone by adjusting sensitivity range
1.
Ensure that your PC is communicating with the Encompass 4/4800 Multiprotocol
Reader using a terminal emulation program as described in “Verifying
Communications” on page 8-8.
Reader using a terminal emulation program as described in “Verifying
Communications” on page 8-8.
2.
Mark the current read zone as described in
.
3.
Enter command #01 to switch to command mode. You are prompted with
#DONE
#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.
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.
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.
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
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.
real traffic by performing the following procedures.
To test the read zone
1.
Ensure that the Encompass 4/4800 Multiprotocol Reader is in data mode.
2.
With the Encompass 4/4800 Multiprotocol 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.
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.
the read zone. If a valid read, the data from this tag held in the read zone displays
on the PC screen.