User's Guide

RFID TAG READER CHAPTER 3
ALH-900X USER’S GUIDE
DOC. CONTROL #8102114-000 REV A
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Geiger Tag Utility
The Geiger Tag utility is designed to assist you in finding the location of a particular tag, or one of a
group of tags. It does this by measuring the returning signal strength (RSSI) from the tag, and
displaying this information on the screen, along with an audible queue. As you scan the reader near
a tag, the RSSI increases, and you see and hear the change. In order to help narrow the field of
view of the reader as you zero-in on the tag, the reader’s output power is scaled down as you get
closer to the tag.
To start the Geiger Tag search, either hold the pistol-grip trigger button, or click once on the green
Start Search button. The reader continues to read tags until you release the trigger or click the Stop
button. Click the red Close box at the top-right corner to return to the main screen.
The Geiger shows the tag’s signal
strength and the reader’s current output
power. Use the Start Search button (or
pistol-grip trigger) to start the search.
When a tag is read, its EPC is displayed
on the screen, along with graphical and
numeric readouts of the tag’s return
signal strength, and the reader’s
transmitting power.
Having the Geiger react to every tag it sees
can quickly become overwhelming. Use the
yellow Mask button at the top-left corner to
indicate which tag or tags you are interested
in finding (see the Tag Mask section).
Narrowing the search down with a tag mask
can make the Geiger utility much more
effective.