RadioShack Pro 74 Vhf Uhf Race Scanner Reciever Owners Manual

Owner’s ManualCat. No. 20-513
PRO-74 100-Channel
VHF/UHF/Air/800 MHz
Race Scanner
Please read before using this equipment.
20-513.fm  Page 1  Wednesday, August 4, 1999  2:39 PM 

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FEATURES
Your new RadioShack PRO-74 100-Channel VHF/UHF/Air/800 MHz
Race Scanner lets you in on the action in the pits at the big race or on
the streets of your home town. This scanner gives you direct access to
more than 30,000 frequencies, including those used by participants
and staff at auto races and air shows, by government agencies, police
and fire departments, ambulance and transportation services, and am-
ateur radio. You can select up to 100 channels for your scanner to
scan, and you can...

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Hypersearchä — lets you set the scanner to search at up to 300 steps
per second, to help you quickly find interesting broadcasts. (The nor-
mal search speed is 100 steps per second).
Two-Second Scan Delay — automatically delays scanning for about 2
seconds before moving to another channel, so you can hear more re-
plies.
Lock-Out Function — lets you set your scanner to skip over specified
channels.
Direct Frequency Search — lets you search all frequencies, starting
directly from a specified frequency....

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Resume Start — the scanner saves its settings when you turn the
power off. This returns you to the function you were using if you acci-
dentally turn the scanner off or the batteries are weak.
Triple-Conversion Circuitry — virtually eliminates any interference
from IF (intermediate frequency) images, so you hear only the selected
frequency.
Your scanner can receive these bands:
We recommend you record your scanner’s serial number here. The
number is on the back panel.
Serial Number:...

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FCC NOTICE
Your scanner might cause radio or TV interference even when it is oper-
ating properly. To determine whether your scanner is causing the interfer-
ence, turn off your scanner. If the interference goes away, your scanner
is causing it. Try the following methods to eliminate the interference:
• Move your scanner away from the receiver 
• Connect your scanner to an outlet that is on a different electrical
circuit from the receiver 
• Contact your local RadioShack store for help 
Note:
 Mobile...

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CONTENTS
Preparation  .......................................................................................  9
Power Sources  ............................................................................  9
Using Internal Batteries ........................................................  9
Charging Nickel-Cadmium Batteries  ..................................  11
Using Standard AC Power  .................................................  12
Using Vehicle Battery Power...

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Special Features  .............................................................................  36
Turning Memory Banks On and Off  ...........................................  36
Locking Out Channels  ...............................................................  36
Priority  .......................................................................................  36
Using the Keylock  ......................................................................  38
Using the Display Backlight...

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PREPARATION
POWER SOURCES
You can power your scanner from any of three sources: 
• Internal batteries (not supplied) 
• Standard AC power using an optional AC adapter 
• Vehicle battery power using an optional DC adapter
Using Internal Batteries
You can power your scanner using four AA batteries. For the longest
operation and best performance, we recommend you use alkaline bat-
teries (such as RadioShack Cat. No. 23-552).
You can also use four rechargeable nickel-cadmium batteries (Cat. No.
23-125)....

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Warning: Never set ALKALINE   JACK   NI-CD to NI-CD if you are
installing non-rechargeable batteries. Non-rechargeable batteries
can get hot or explode if you try to recharge them.
3. Install two batteries in the compartment and two in the cover as
indicated by the polarity symbols (+ and –) marked inside those
locations.
Cautions: 
• Use only fresh batteries of the required size and recommended
type.
• Always remove old or weak batteries. Batteries can leak chemi-
cals that destroy electronic...

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Charging Nickel-Cadmium Batteries
The scanner has a built-in circuit that lets you recharge nickel-cadmium
batteries while they are in the scanner. To charge the batteries, set 
AL-
KALINE  JACK  NI-CD
 to NI-CD, install the nickel-cadmium batteries
in the scanner, and connect an external AC or DC adapter to the scan-
ner’s 
POWER jack (see “Using Standard AC Power” on Page 11 or “Us-
ing Vehicle Battery Power” on Page 12).
Warning:
 Do not connect either adapter to the scanner if you have...