12
Placing the Antenna
Antenna placement is critical to ensuring that information is transmitted
to and from tags accurately. Observe the following guidelines when plac-
ing the antenna:
Locate the antenna away from metal objects, microwave ovens,
and other devices that may induce radio frequency interference.
In addition, make sure there are no metallic surfaces between,
or in relative proximity to, the scanner and tag. For additional
placement considerations, refer to “RF Communications” on
page 23.
When reading, the antenna should be placed no more than 60 inches
from the objects bearing tags. When writing, the antenna should be no
more than 20 inches from objects bearing tags
Caution: to meet FCC RF Exposure compliance, operator(s) should
not be closer than 22 inches to a transmitting antenna. See RF
Exposure precautions on page 41.
The front of the antenna must be free of obstructions. Otherwise,
information may not be written to and read from tags accurately.
I
Antennas must be labelled indicating minimum separation
distance per FCC RF Exposure requirements (page 41). If the
information on the label is not clearly visible, a sign with the same
information must be posted within 36” of the antenna. (see last page
of this manual)
I
Tags must reside within the scan field for at least 3 milliseconds for
information to be retrieved from them.
556-EP Manual.P65
2/27/2001, 3:21 PM
12
