User's Guide

RFID TAG READER CHAPTER 3
ALH-900X USER’S GUIDE
DOC. CONTROL #8102114-000 REV A
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Tag Mask – Scan
Tag Mask – Specify
The Tag Mask “Specify” tab allows you to do three things: take a quick peek at tag memory (to help
you determine your mask definition), define an arbitrary or “EPC Prefix” mask, and verify your
mask.
The upper Quick Peek section lets you choose a bank, pointer offset, and number of words to read.
Clicking the green Read button will query any tag in the field (without any masking) and report the
data from that tag.
The middle section is where you actually define your mask. There are two options here: create a
mask based on an EPC prefix (i.e. “all tags starting with…”), or create an arbitrary mask. If you
select EPC Prefix, the only thing you have to provide is the hex data representing the initial part of
the EPC code for your tags (the other controls are disabled). If you select Arbitrary, you choose the
bank and pointer offset, along with the mask data. Click the red Set Mask button to define your
mask.
After you’ve defined a mask, you can do a quick verification by clicking the green Masked Read
button in the Verify Mask section at the bottom. Any responding tag’s EPC will be shown in the text
field there.
Select a tag from the list and click the
Set Mask to Selected Tag button. Click
an empty part of the list and click the
Clear Mask button to clear the mask.
The Scan tab acts just like the Inventory
screen – start/stop the reader with the
trigger or Start Scan button, and all tags
in range are displayed.
Masks defined with the Scan method
are displayed on the utility screens as
simply the full EPC of the tag.