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Selecting an Antenna LSelecting an Antenna L
Selecting an Antenna LSelecting an Antenna L
Selecting an Antenna L
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The location and configuration of your antenna mount will determine the quality
of your signal; therefore, there are some important factors to consider.
º Where will the receivers be located? Ideally, the antenna will be centrally
positioned above that area.
º Where will the transmitter or stationary receiver / power amplifier be located?
We recommend that it be located no more than 25 feet (7.6 meters) from the
antenna.
º Are there any metal obstructions in the area? Ideally, there will be no metal
between the antenna and the receivers. Also, try to avoid mounting the
antenna in a location where nearby metal would be in parallel with the an-
tenna -- this degrades the signal.
º Will the antenna be mounted outdoors? Antennas work well outdoors, but if
possible, try to place the antenna where it will not receive too much exposure
to moisture or dirt. Covering exposed connections with petroleum jelly or
silicone gel will extend the life of the antenna.
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Several types of antennas are included in this kit. You will only use one of them.
How do you select the best antenna?
º First, what is your operating frequency -- 72 MHz or 216 MHz? This eliminates
half of the antennas since you can only use an antenna that will work for your
frequency range. Remember, the LONGER antennas work on the lower
frequency of 72 MHz and the SHORTER antennas work at 216 MHz.
º Next, do you have any space restrictions? The rigid dipole antenna (the one
with the two extendable arms) provides the best signal, but only if you can
fully extend the sections of the antenna. If you can’t fully extend the rigid
dipole, you will need to go with either the flexible dipole or the monopole
antenna. We recommend using a dipole antenna whenever possible.
º If you need to mount your antenna on top of an equipment rack, you will need
to use the monopole antenna.
º For mounting in a ceiling or in a wall, or taking up the least amount of space
along an outside edge of a wall, the flexible dipole antenna is a good choice.
Remember, though, that you need to extend the sections of this “floppy”
antenna as far apart from each other as possible.
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
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