User Guide
5
Setup Instructions
Important Things to Note Before Starting Your Installation
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 2 dB 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 through obstacles! Obstacles, especially metal,
can create drop-outs or reections of your signal that will result in poor listening conditions.
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
immediately and retain all packaging for inspection by your carrier. Listen
is not responsible for shipping damage.
Listen Technologies Corporation
14912 Heritagecrest Way
Salt Lake City, Utah 84065-4818 U.S.A.
801.233.8992
800.330.0891
North America
801.233.8995
fax
www.listentech.com
Before Starting Assembly of Your Antenna