User Manual

26
Optimizing Performance
While it is not possible to predict how your system will perform in any
given environment, observing the following guidelines will help optimize
performance in your environments and applications:
Carefully plan the placement of the scanner antennas. The antennas
can be extended approximately ten feet from the scanner, depending
on cable length purchased for the application. If your application
requires longer distances, move the scanner to an appropriate
location.
I The scanner antennas should never be disassembled, altered, or
modified except by an authorized technician. Any unauthorized
antenna modifications can void your warranty.
Consider the environment’s RF characteristics, including construction
materials, office plan (closed or open), and the presence of windows
and ducting. The RF field pattern, and the reading distance, may be
influenced by nearby metal objects, such as appliances, equipment,
metal wall framing, and wire coat hangers.
Ensure that objects containing tags are no more than 84 inches from
the antenna and remain in the scan field for at least 3 milliseconds.
To avoid mutual interference when installing more than one tag in
the same object, allow a sufficient distance between the tags. The
maximum interference occurs when tags within the same object are
within two inches of each other and nearly equidistant from a scanner
antenna.
Never apply chemicals to the tags. Certain chemicals, such as
alcohol, may have little or no effect at room temperature, but may
become corrosive at higher temperatures.
U519 FCC rewrite 2-22-01.p65 2/22/2001, 2:43 PM26