User Manual

12
Connecting External Antennas
The rear panel provides nine coaxial antenna connectors. Each connector
accommodates a single external antenna. Figure 2 shows the external
antenna connections to the scanner.
I The U519 can be used with fewer than nine antennas. Install antennas
sequentially, starting with the left-most connector.
Placing the Antenna
Antenna placement is critical to ensure information is written to and read
from tags accurately. Observe the following guidelines when placing
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 84
inches from the objects bearing tags. When writing, the antenna
should be no more than 24 inches from objects bearing the tag.
Caution: to meet FCC RF Exposure compliance, operator(s) should
not be closer than 9 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)
U519 FCC rewrite 2-22-01.p65 2/22/2001, 2:43 PM12