5
Up & in the clear
The radio waves coming from your
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antennas do not shoot
out like a laser beam, rather they radiate from the antenna like a flash light
beam. Therefore the transmitter and receiver should both be up and in the
clear.
$YHQWXUD
recommends a minimum mounting height of 15 feet above
any obstructions which may block or interfere with the transmission signal.
Ground
Plane
If the radio devices are not mounted high enough above obstructions, the signal
strength will be seriously reduced; therefore your distance will be reduced. The
signal will literately bounce up and away from your intended target. This is
known as a negative ground plane effect. The ground plane could not only be
the ground you stand on, but could also be the rooftops of cars or distant
buildings. If we have a choice, place the transmitter / receiver enclosures, or if
external antenna, on the edge of the roof looking AWAY from the building,
rather than installing them in the middle of the roof.
Trees Grow!
If we install the video link in the winter, the leaves that come out in spring may
eliminate your wireless link. Are you trying to transmit through trees? Then you
will need to seriously consider how much range will be lost. A field test is
always the best way to find out. Speak to a
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Technologies Tech for
a possible solution.
Unusual
Traffic
Watch out for unusual traffic in your transmission path. Tractor-trailers or other
large vehicles may be a factor if trying to transmit over a highway. Metal
obstructions between the antennas cannot be ignored including electrical
transmission lines that may not be obvious in the distance.
