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LA-122 Universal Antenna Kit
LISTEN TECHNOLOGIES CORPORATION 8535 South 700 West, Suite A Sandy, Utah 84070-2515 USA
Phone: +1.801.233.8992 USA Toll Free: 1.800.330.0891 Fax:+1.801.233.8995 e-mail: info@listentech.com
The antenna’s pattern is hemispherical, meaning that it has an “active” side and a
ground side. The active side directs the signal toward the receivers, so it is
essential that the active side be oriented toward the area where the receivers will
be used. The Antenna Module’s ground side has the word “GROUND” molded
into the plastic.
See Diagram A. If it is necessary to locate an antenna low on a wall, the ground
side should face down. If you are mounting a monopole antenna in a ceiling or
high on a wall, the ground side should face UP. It may be necessary to move the
ground side of the antenna mount around in order to accomplish this.
To move the ground side of the module, simply remove the four nuts, reverse the
module so that the ground side is facing the bracket, then re-attach the nuts. Be
careful to not detach any wires if the module opens while it is not secured to the
bracket.
Antenna Orientation
Diagram A. Antenna coverage patterns. In Scenario 1, the antenna is mounted low in the facility. The
GROUND side of the antenna (marked on the module) should face down. In Scenario 2, the antenna is
mounted high in the facility. The GROUND side of the antenna should face up.
Ground side of antenna
This is the area of coverage
Ground side of antenna
This is the area of coverage
Scenario 1 -
Antenna is mounted low
in the facility
Scenario 2 -
Antenna is mounted high
in the facility
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