Scorpion I Reader
Copyright 2001
RF Code, Inc.
7
If wireless Ethernet is used, plug the wireless PCMCIA card into the Client
Bridge while the unit’s power is turned off. Do not attempt to use the wired RJ-
45 connection at the same time the wireless PCMCIA card is plugged in.
4.3 Scorpion I Reader Antennas
The type of antennas used and the
reader’s range setting determine the
effective read range. The normal
reader range features are defined
using ¼ wave helical antennas. These
antennas are appropriate for most
reader applications. Optional antennas
that offer diverse receiving properties are available for the Scorpion I Reader.
Contact your Scorpion I Reader distributor for more information.
The Scorpion I Reader has two receiver channels
that can operate independently, or jointly, to provide
tag signal diversity reception. The reader can
operate with one antenna on either antenna post;
the benefit of receiver diversity reception is obtained with both antennas
attached.
To achieve the best receiver diversity, it is desirable to have the antennas
positioned at different angles from the reader. Because the tags
may be located at various places and orientations around the
reader, the signal path to the reader may vary for each tag.
Because the signal path is different for each tag, one antenna
may see the signal while the other may not. Keep the
antennas separated; having the antennas overlapped cancels the
effectiveness of each antenna. It may be necessary to experiment with
antenna positions to achieve optimum coverage.
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