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6193-3201
Where antennas are mounted on elevated masts, the masts should be effectively earthed
to avoid lightning surges. For high lightning risk areas, surge suppression devices between
the module and the antenna are recommended. If the antenna is not already shielded
from lightning strike by an adjacent earthed structure, a lightning rod may be installed
above the antenna to provide shielding.
2.2.1 Dipole and Collinear antennas.
A collinear antenna transmits the same amount of radio power in all directions – as
such that are easy to install and use. The dipole antenna with integral 15 ‘ cable does not
require any additional coaxial cable, however a cable must be used with the collinear
antennas.
Collinear and dipole antennas should be mounted vertically, preferably 3 feet (1 metre)
away from a wall or mast to obtain maximum range.
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