Determine the Outdoor Range
Outdoor Antenna Installation Guide
3-11
The minimum clearance for the various antenna combinations and
distances is listed in the grey-shaded columns of Table 3-1 and
Table 3-2, where clearance should be interpreted as follows:
■
In
open areas
without obstacles in the signal path, clearance
is measured as height above the surface of the earth.
For example, if the antenna is mounted on the roof, this height
includes the height of the building plus the height of the mast
above the rooftop.
■
In
areas with obstacles
in the signal path between the two
antenna(s), clearance should be measured as height above
the highest obstacle(s) in the signal path.
■
In
dense urban areas
, the clearance should be measured as
height above the highest rooftop or any other obstacle(s) in the
signal path between the two antenna(s).
Looking at the minimum clearance requirements as identified in
Table 3-1 and Table 3-2, you may realize that local authorities, the
proprietor of the premises, or other reasons may not allow you to
set up an antenna mast that will enable you to meet the listed
clearance requirement.
In such situations, you may not be able to achieve a full line-of-
sight clearance. At the same time however, you may not even need
full clearance, since the distance that your wireless outdoor
installation needs to cover is less than the listed maximum range.
