User's Manual

User Guide
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User Guide, WherePort IV D1300 REV A
© Copyright WhereNet, Corp. 2008 WhereNet Confidential
7.2. Coverage Areas
The size of the coverage area is significant as well as its location or placement. It is important that the tag
be released from a field when it is no longer in the area being monitored by the WherePort IV.
There are three areas that are described for the field.
Guaranteed Capture All WhereTags at a given orientation will always be pinged in this area.
Uncertainty A WhereTag may or may not be pinged in this area.
Guaranteed Release A WhereTag will never be pinged beyond this range.
Since a tag may or may not be pinged in the uncertainty area, this area presents the most challenge for a
planner. If a single WherePort IV is installed, a tag that needs to be pinged may not be and a tag that
needs to be released may not be. These coverage areas must be well understood to be able to set up a site.
In the examples that follow these principles will be translated into real applications.
A WhereTag moving through a WherePort IV field will typically change its orientation with respect to
the WherePort IV. As the orientation changes the effective range of the WherePort IV will change.