Setup; Antenna - Radio Shack PRO-652 User Manual

Setup

Antenna

You scanner's antenna connects easily, or you can
use a variety of antennas, such as an external mobile
antenna or outdoor base station antenna.
To connect an external antenna, follow the
installation instructions supplied with the antenna.
Always use 50-ohm coaxial cable, such as RG-58 or
RG-8 low-loss dielectric coaxial cable. You may also
need a BNC adapter.
To connect the included antenna:
1. Align the slots.
2. Rotate connector.
Your scanner's frequency sensitivity depends on its
location and the antenna length. For best reception,
adjust the antenna's length as follows:
FREQUNCY
25-54 MHz Extend fully
108-174 MHz Extend 4 segments
216-225 MHz Extend 3 segments
225-406 MHz Extend 2 segments
406-1300 MHz Collapse fully
ANTENNA LENGTH
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WARNING: Use extreme caution when installing or
removing an outdoor antenna. If the antenna starts to
fall, let it go! It could contact overhead power lines. If the
antenna touches a power line, touching the antenna,
mast, cable, or guy wires can cause electrocution and
death. Call the power company to remove the antenna.
DO NOT attempt to do so yourself.
WARNING: Outdoor antennas must be properly
grounded to prevent static buildup and lightning
damage. Article 810 of the National Electrical
Code, ANSI/NFPA 70, provides information about
proper grounding of the antenna mast, connection
of coaxial cable to an lightning arrestor, size of
grounding conductors, location of the lightning
arrestor and connection of grounding conductors to
grounding electrodes.
Additionally, disconnect your radio from the outdoor
antenna during electrical storm activity to prevent
damage. The diagram below provides an example of
a proper antenna grounding system.
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