User's Manual

User Guide
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User Guide, WherePort IV D1300 REV A
© Copyright WhereNet, Corp. 2008 WhereNet Confidential
Figure 10 Orientation
When the coil in the tag and the port are parallel the range is the greatest. When the coils are
perpendicular the range is the shortest.
The relative positions of the two coils, WherePort IV transmitting and WhereTag receiving, determine
the range in which the tag will receive the signal. This range is the coverage area, or guaranteed capture
area (Figure 11). The guaranteed capture area is different for each orientation of the tag and the power
level of the WherePort IV.
Figure 11 Capture Area
The capture area is shown by the dark shaded area. This shape varies with the orientation of the
tag and the power level of the WherePort IV. The lightly shaded area is the uncertainty area.
Tag Orientation 2
Parallel Coils
Perpendicular
Coils
Guaranteed
Capture Area
Uncertainty Area