User's Manual

User Guide
WherePort III User Guide D948 Rev B
©2010 Zebra Enterprise Solutions. WherePort and all product names and numbers are Zebra Enterprise Solutions trademarks. All oth
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Figure 14 Overlapping Uncertainty Areas
Coverage Overlaps
When positioning WherePorts it is not always possible to prevent their fields from
overlapping. Overlapping the uncertainty areas of two WherePorts does not produce a
guaranteed capture area. It produces an area where a tag may be pinged by either one or
the other WherePorts or none.
When the fields of two WherePorts must be overlapped to cover a large area
(Figure 14) it is necessary to set the phases of the two WherePorts. Both WherePorts (or
more if more fields are overlapping) must also have the same ID number. If the phases
are not set, it may be impossible or difficult for a tag in the field to accurately report the
ID of the WherePort for the field it is in.
Field Overlap