RadioShack Pro 72 Portable Scanner Reciever Owners Manual

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3. If you are installing individual batteries, insert six AA
batteries in the battery holder as indicated by the
polarity symbols (+ and –) marked on the battery
holder.
4. Slide the battery holder or battery pack into the com-
partment as shown.
Caution: The battery holder or battery pack fits only
one way inside the battery compartment. Do not
force it.
5. Replace the cover.
When battery power is low, 
BATT flashes and the scanner
beeps about every 3 seconds. Immediately replace all six...

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Using Standard AC Power
To power the scanner from AC power, you need an AC
adapter (Cat. No. 273-1665).
Cautions:
• You must use an AC adapter that supplies 9 volts and
delivers at least 200 milliamps. Its center tip must be
set to negative, and its barrel plug must correctly fit
the scanner’s 
PWR/DC 9V jack. The recommended
adapter meets these specifications. Using an adapter
that does not meet these specifications could damage
the scanner or the adapter.
• When you finish using the AC adapter,...

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Using Vehicle Battery Power
To power the scanner from your vehicle’s cigarette-lighter
socket, you need a DC adapter (Cat. No. 270-1560).
Cautions:
• You must use a DC adapter that supplies 9 volts and
delivers at least 200 milliamps. Its center tip must be
set to negative, and its plug must correctly fit the
scanner’s 
PWR/DC 9V jack. The recommended
adapter meets these specifications. Using an
adapter that does not meet these specifications
could damage the scanner or the adapter.
• To protect your...

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Notes: 
• Mobile use of this scanner is unlawful or requires a
permit in some areas. Check the laws in your area.
• If the scanner does not operate properly when you
connect a DC adapter, unplug the adapter from the
cigarette-lighter socket and clean the socket to
remove ashes and other debris.
Charging a Rechargeable Battery Pack
Your scanner has a built-in charging circuit that lets you
charge a rechargeable battery pack (Cat. No. 23-288)
while it is in the scanner. To charge the battery pack, sim-...

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Important! At the end of a rechargeable battery pack’s
useful life, it must be recycled or disposed of properly.
Contact your local, county, or state hazardous waste
management authorities for information on recycling or
disposal programs in your area. Some options that might
be available are: municipal curb-side collection, drop-off
boxes at retailers such as your local RadioShack store,
recycling collection centers, and mailback programs.
CONNECTING THE ANTENNA
Follow these steps to attach the...

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Connecting an Optional Antenna
The ANT jack on the top of the scanner makes it easy to
use the scanner with a variety of antennas. Instead of the
supplied antenna, you can attach a different one, such as
an external mobile antenna or outdoor base station anten-
na. Your local RadioShack store sells a variety of anten-
nas.
Always use 50-ohm coaxial cable, such as RG-58 or RG-
8, to connect an outdoor antenna. For lengths over 50
feet, use RG-8 low-loss dielectric coaxial cable. If your an-
tenna’s...

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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 perma-
nent hearing loss.
• Set the volume to the lowest setting before you begin
listening. After you begin listening, adjust the volume
to a comfortable level.
• Once you set the volume, do not increase it. Over
time, your ears adapt to the volume level, so a vol-
ume level that does not cause discomfort...

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CONNECTING AN EXTENSION 
SPEAKER
In a noisy area, an extension speaker (Cat. No. 21-549) or
an amplified speaker (Cat. No. 21-541) might provide
more comfortable listening. 
Plug the speaker cable’s 
1/8-inch plug into your scanner’s
 jack.
USING THE BELT CLIP
You can use the belt clip for hands-free carrying when you
are on the go. Simply slide the belt clip over your belt or
waistband.
Belt Clip
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YOUR SCANNER
Once you understand a few simple terms we use in this
manual and familiarize yourself with your scanner’s fea-
tures, you can put the scanner to work for you. You simply
determine the communications you want to receive, then
set the scanner to scan those frequencies.
A frequency
 is the tuning location of a station (expressed
in kHz or MHz). To find active frequencies, you can use
the search
 function to search bands
, which are preset
ranges of frequencies.
When you find a frequency, you...

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A LOOK AT THE KEYPAD
Your scanner’s keys might seem confusing at first, but this
information should help you understand each key’s func-
tion.
WX — scans through the preprogrammed weather chan-
nels.
BAND — selects a preprogrammed search band.
SCAN — scans through the programmed channels.
MANUAL — stops scanning to let you directly enter a
channel number.
/  — searches down or up from the currently dis-
played frequency, or selects the direction when you scan
channels.
CLEAR — clears an incorrect...