Listen Technologies user manual Antenna Orientation, LA-122Universal Antenna Kit

LA-122 Universal Antenna Kit

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Antenna Orientation

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.

Scenario 1 -

Antenna is mounted low in the facility

This is the area of coverage

Ground side of antenna

Scenario 2 -

Antenna is mounted high in the facility

Ground side of antenna

This is the area of coverage

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.

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

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