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If you plan to use your own coaxial cable instead of the provided cable, you must use
cable and connectors rated at 50 ohms. Although cable used for cable TV installations
looks similar to this cable, it won’t work with your Listen system.
If you need to run cable over a greater length than 50 feet for 216 MHz applications or
greater than 100 feet for 72 MHz applications, we recommend that you use RG-8 cable
rather than RG-58. It is a lower loss cable, meaning that more of your signal will reach
the antenna.
Long cable runs can result in signal degradation due to “loss” characteristics of the
cable. At 72 MHz, there is a loss of 2dB per 100 feet of cable and at 216 MHz, there is a
loss of 5 dB per 100 feet of cable. (A 3dB loss means half of your power has been lost.)
However,
it is better to suffer coaxial power loss than to try to shoot your signal throughit is better to suffer coaxial power loss than to try to shoot your signal through
it is better to suffer coaxial power loss than to try to shoot your signal throughit is better to suffer coaxial power loss than to try to shoot your signal through
it is better to suffer coaxial power loss than to try to shoot your signal through
obstacles! obstacles!
obstacles! obstacles!
obstacles! Obstacles, especially metal, can create drop-outs or reflections of your sig-
nal that will result in poor listening conditions.
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
Coaxial Cable
Please carefully compare the contents of your kit with the list found on page 2 of
this manual. If any items are missing or damaged, please contact Listen
Technologies. If items were damaged in shipment, contact your carrier immedi-
ately and retain all packaging for inspection by your carrier. Listen is not respon-
sible for shipping damage.
Listen TListen T
Listen TListen T
Listen T
echnologies Corporationechnologies Corporation
echnologies Corporationechnologies Corporation
echnologies Corporation
8535 South 700 West, Suite A
Sandy, Utah 84070-2515 USA
Telephone: +1.801.233.8992
USA Toll Free: 1.800.330.0891
Fax: +1.801.233.8995
e-mail: info@listentech.com
Before Starting Assembly of Your Antenna
Important Things to Note Before Starting Your Installation
4