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20-428 Owner's Manual
your vehicle. You may also want to connect an external antenna if you use your scanner as a base
station.
Your local RadioShack store sells a variety of antennas. Always use 50-ohm coaxial cable, such as
RG-58 or RG-8, to connect an outdoor antenna. For lengths exceeding 50 feet, use RG-8 low-loss
dielectric coaxial cable. If your coaxial cable does not have a BNC connector, you will also need a
BNC adapter (not supplied).
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.
connect an external speaker or headphones
When you mount your scanner in your dashboard, you will need to connect an external speaker or
headphones.
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listening safely
To protect your hearing, follow these guidelines when you use headphones.
• Adjust VOL (volume) to its lowest level before putting on headphones. With the headphones on,
adjust VOL to a comfortable level.
• Avoid increasing the volume once you set it. Over time, your sensitivity to volume decreases, so
volume levels that do not cause discomfort might damage your hearing.
• Avoid listening at high volume levels. Prolonged exposure to high volume levels can cause
permanent hearing loss.
traffic safety
Do not wear headphones while driving. This can create a traffic hazard and is illegal in some areas.
Even though some headphones let you hear outside sounds when you listen at normal levels, they
still can present a traffic hazard.
quick start
To help familiarize yourself with the scanner's functions, keypad, and available frequencies, you can
utilize one of these four features before you begin programming the scanner.
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