User's Manual

20-424 Owner’s Manual
Page 6
When deciding on an outdoor antenna and its location, consider these points:
• The antenna should be located as high as possible.
• The antenna and antenna cable should be as far as possible from sources of electrical noise
(appliances, other radios, and so on).
• The antenna should be vertical for the best performance.
To connect an optional base-station or mobile antenna, first remove the supplied antenna from the
scanner. Always use 50 Ohm coaxial cable, such as RG-58 or RG-8, to connect an outdoor
antenna. For length over 50 feet, use RG-8 low-loss dielectric coaxial cable. If the antenna cable’s
connector does not have a BNC connector, you will also need a BNC adapter (not supplied,
available at your local RadioShack store). Your local RadiShack store carries a wide variety of
coaxial cable and connectors.
Once you choose an antenna, follow the mounting instructions supplied with the antenna. Then
route the antenna’s cable to the scanner and connect the cable to the
ANT connector.
Warning: Use extreme caution when you 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,
contact with 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.
Caution: Do not run the cable over sharp edges or moving parts that might damage it.
CONNECTING AN EARPHONE/HEADPHONES
For private listening, you can plug an 1/8-inch (3.5 mm) mini-plug earphone or headphones (not
supplied), available at your local RadioShack store, into the (headphone symbol)/PC jack on the
rear of your scanner. This automatically disconnects the internal speaker.
Listening Safely
To protect your hearing, follow these guidelines when you use an earphone or headphones.
• Do not listen at extremely high volume levels. Extended high-volume listening can lead to
permanent hearing loss.
• Set the volume to the lowest setting before you begin listening. After you begin listening, adjust
the volume to a comfortable level.