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Antenna Placement
The antenna for the Central Controller must have
a
minimum
length of 7 feet and should be run in an area central to
all the
transmitter locations.
Increasing the length of the wire does not proportionally increase
the effectiveness of the reception. Short increases in length run
toward the weakest RF link can increase reception, however, extra
long antennas can actually decrease reception. It is best
to keep
the antenna length
less
than I5 feet, if possible.
Poor reception can. occur when the antenna is mounted in an area
where a large metallic object is present. These metallic objects
block the RF waves. Sometimes sources of metal are obvious, such
as washing machines, refrigerators, heaters, etc...Other sources
are better hidden. Metal ducts, other electrical wires, and steel
"I”
beams can all cause trouble if the antenna is run on top of or near
them.
‘Note: The antenna wire should not be bundled along with the
phone line or any other wire. Many installers do this to make the
installation look better, however, "no check in’ problems may
appear due to the introduction of electrical noise, such as static,
into the system.
CAUTION: Don’t loop antenna wire.
AT&T
Proprietary
Information
2-13