User's Manual

CHAPTER 3 RFID TAG READER
ALH-901X USER’S GUIDE
DOC. CONTROL #8102117-000 REV D
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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 section, called Unmasked, 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.
The Quick Peek section lets you get a
glimpse of an actual tag’s memory, to
help you define your mask.
Defining a mask based on an EPC
prefix is easy – just click the radio
button, enter the EPC data and click Set
Mask.