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10
NOTE:
An example of the Fresnel Zone dimensions is, for a one quarter
mile link, the Fresnel Zone is approximately 7
the line of site. Therefore the height of the antenna must clear the Fresnel
Zone. For very short distances, wooden structures and non metallic
objects have little effect on the RF signal. For long distance paths, there
should be no obstacles close to the RF path.
To determine line of sight
1.
Access the rooftop using a safe ladder, either tied or held by another
surveyor.
2.
Scan the other rooftops in the location. Ensure line of sight ensuring
that other routers can be seen from the selected vantage point.
The router being installed may be the first in the area. If this is the
NOTE:
case, ensure that the other rooftops in the area can be seen from the
selected vantage point.
3.
If it is not possible to see other routers/rooftops, it may be necessary
to install the router on an adjoining tall structure, or to install a mast.
Nokia RoofTop™ Wireless Router Installation Guide
1
/
feet above and below
2
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