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

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AT&T 8000 Antenna Placement, Transmitter locations, Antenna length less than I5 feet, if possible, Them