WD-Z2 Series Installation Guidelines Rev.5
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(3) Stable Wireless Communication Zone
- It is required to have a good line of sight for each device (WDR, WDT) free from any obstacles (hereafter
referred to as the Fresnel Zone).
- The Fresnel Zone is a three-dimensional space, in which its size is estimated as follows:
With a line of sight at L: 20m, the Fresnel Zone diameter D is about 1.6m.
With a line of sight at L: 10m, the Fresnel Zone diameter D is about 1.2m.
- If the Fresnel Zone cannot be set up, the available communication distance may be shorter than usual due to
obstacles inhibiting communication.
CAUTION
- When the transmitter and receiver are mounted on the same wall, as shown in the diagram below, the wall
becomes an obstacle in the Fresnel Zone, risking a decrease in communication performance. This applies not
only to walls, but also to other obstacles such as ceilings, flooring and large equipment.
In such cases, devise a way of installing the receiver and transmitter as far from the wall, or other obstacles,
as possible.
