Radio Shack Scanner PRO 70 User Guide

20-310.fm Page 1 Wednesday, August 4, 1999 10:49 AM  
OWNER’S MANUAL  
PRO-70  
50-Channel Portable Scanner  
Please read before using this equipment.  
Cat. No. 20-310  
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Channel Lockout — keeps channels you select from be-  
ing scanned.  
Key Lock — lets you lock the scanner’s keys to help pre-  
vent accidentally changing the scanner’s programming.  
Flexible Antenna with BNC Connector — provides ex-  
cellent reception and is designed to help prevent antenna  
breakage.  
Liquid Crystal Display — makes it easy to view and  
change programming information.  
Display Backlight — makes the scanner easy to read in  
low light situations.  
Three Power Options — let you power the scanner from  
internal batteries (non-rechargeable batteries or a re-  
chargeable scanner battery pack) or external AC or DC  
power (using optional adapters).  
We recommend you record your scanner’s serial number  
here. This number is on the scanner’s back panel.  
Serial Number:  
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Your PRO-70 scanner contains the following prepro-  
grammed frequencies (divided into search bands). See  
“Using Band Search” on Page 25.  
Frequency  
Search  
Range  
Band  
Description  
(in MHz)  
0
1
2
3
29-30  
30-50  
10-Meter Amateur Radio  
VHF Low  
50-54  
6-Meter Amateur Radio  
137-144  
Aircraft/Air Shows,  
Government  
4
5
6
7
8
9
144-148  
148-174  
380-420  
420-450  
450-470  
470-512  
2-Meter Amateur Radio  
VHF Hi  
U.S. Government  
70-Centimeter Amateur Radio  
UHF Low  
UHF “T” Band  
In addition, your scanner is preprogrammed with the fol-  
lowing weather service frequencies:  
161.650  
162.525  
162.500  
161.775  
162.450  
162.550  
162.400  
162.475  
163.275  
162.425  
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This owner’s manual also includes the section “A General  
Guide to Scanning,” which helps you target frequency  
ranges in your service area so you can search for a wide  
variety of broadcasts.  
FCC NOTICE  
Your scanner might cause TV or radio interference even  
when it is operating properly. To determine whether your  
scanner is causing the interference, turn off your scanner.  
If the interference goes away, your scanner is causing  
the interference. Try the following methods to eliminate  
the interference.  
• Move your scanner away from the TV or radio  
• Connect your scanner to an outlet that is on a differ-  
ent electrical circuit from the TV or radio  
• Contact your local RadioShack store for help  
If you cannot eliminate the interference, the FCC requires  
that you stop using your scanner.  
This device complies with Part 15 of the FCC Rules. Op-  
eration is subject to the following conditions: (1) This de-  
vice must not cause harmful interference, and (2) This  
device must accept any interference received, including  
interference that may cause undesired operation.  
Note:  
Mobile use of this scanner is unlawful or requires a  
permit in some areas. Check the laws in your area.  
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SCANNING LEGALLY  
Scanning is a fun and interesting hobby. You can hear  
police and fire departments, ambulance services, govern-  
ment agencies, private companies, amateur radio servic-  
es, aircraft, and military operations. It is legal to listen to  
almost every transmission your scanner can receive.  
However, there are some electronic and wire communi-  
cations that are illegal to intentionally intercept. These in-  
clude:  
Telephone conversations (cellular, cordless, or other  
private means of telephone signal transmission)  
• Pager transmissions  
• Scrambled or encrypted transmissions  
According to the Federal Electronic Communications Pri-  
vacy Act (ECPA), as amended, you could be fined and  
possibly imprisoned for intentionally listening to, using, or  
disclosing the contents of such a transmission unless you  
have the consent of a party to the communication (unless  
such activity is otherwise illegal). These laws change from  
time to time and there might be state or local laws that also  
affect legal scanner usage.  
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CONTENTS  
Preparation .................................................................. 9  
Power Sources ...................................................... 9  
Using Batteries ............................................... 9  
Using Standard AC Power ............................ 11  
Using Vehicle Battery Power ........................ 12  
Charging a Rechargeable Battery Pack ....... 13  
Connecting the Antenna ...................................... 14  
Connecting an Optional Antenna .................. 15  
Connecting an Earphone/Headphones ................ 16  
Listening Safely ........................................... 16  
Traffic Safety ................................................. 16  
Connecting an Extension Speaker ...................... 17  
Using the Belt Clip ............................................... 17  
Understanding the PRO-70 ...................................... 18  
A Look at the Keypad .......................................... 18  
A Look at the Display ........................................... 19  
Operation ................................................................... 21  
Turning On the Scanner and Setting SQUELCH . 21  
Searching For and Storing Active Frequencies ... 22  
Active Frequency References ...................... 22  
Storing Frequencies ..................................... 23  
Using Band Search ....................................... 25  
Using Direct Search ...................................... 27  
Using the Monitor Memory ................................... 28  
Listening to the Monitor Memory .................. 28  
Moving a Frequency from the Monitor  
Memory to a Channel ................................... 28  
Scanning the Stored Channels ............................ 29  
Monitoring a Stored Channel ............................... 30  
Clearing a Stored Channel .................................. 31  
Special Features ....................................................... 32  
Using the Keylock ................................................ 32  
Locking Out Channels ......................................... 32  
Using a 2-Second Delay ...................................... 33  
Using the Display Backlight ................................. 34  
Listening to a Weather Band ............................... 34  
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A General Scanning Guide ...................................... 36  
Guide to Frequencies .......................................... 36  
National Weather Frequencies ..................... 36  
Ham Radio Frequencies ............................... 36  
Birdie Frequencies ....................................... 37  
Guide to the Action Bands ................................... 37  
United States Broadcast Bands ................... 37  
Typical Band Usage ..................................... 38  
Primary Usage .............................................. 38  
Specified Intervals ........................................ 39  
Band Allocation .................................................... 40  
Avoiding Image Frequencies ............................... 45  
Frequency Conversion ........................................ 46  
Troubleshooting ........................................................ 47  
Resetting/Initializing the Scanner ........................ 49  
Resetting the Scanner .................................. 49  
Initializing the Scanner ................................. 50  
Care and Maintenance .............................................. 51  
Specifications ........................................................... 52  
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PREPARATION  
POWER SOURCES  
You can power your scanner from any of three sources:  
• Internal batteries or a rechargeable scanner battery  
pack (not supplied — see “Using Batteries”)  
• Standard AC power (with an optional AC adapter —  
see “Using Standard AC Power” on Page 11)  
• Vehicle battery power (with an optional DC adapter  
— see “Using Vehicle Battery Power” on Page 12)  
Notes:  
• Connecting an AC or DC adapter to the scanner dis-  
connects any internal batteries, but it does not dis-  
connect a rechargeable battery pack. If you install a  
rechargeable battery pack, you can operate the  
scanner and recharge the battery pack at the same  
time. See “Using Batteries” and “Charging  
Rechargeable Battery Pack” on Page 13.  
a
• If the scanner stops working properly after connect-  
ing it to power, try resetting it. See “Resetting/Initial-  
izing the Scanner” on Page 49.  
Using Batteries  
You can power your scanner from six AA batteries. For the  
longest operation and best performance, we recommend  
alkaline batteries, such as RadioShack Cat. No. 23-552.  
You can also power the scanner from a rechargeable  
scanner battery pack, such as Cat. No. 23-288.  
Note:  
You can also use six rechargeable nickel-cadmium  
batteries (such as Cat. No. 23-125) to power the scanner.  
To charge or recharge nickel-cadmium batteries, howev-  
er, you must remove them from the scanner and use an  
external charger (such as Cat. No. 23-134).  
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Follow these steps to install batteries or a battery pack.  
1. Press down on the battery compartment cover on the  
bottom of the scanner and slide the cover in the  
direction of the arrow to remove it.  
2. Pull up and slide the battery holder or battery pack  
out of the battery compartment.  
3. If you are installing individual batteries, insert six bat-  
teries in the battery holder as indicated by the polar-  
ity symbols (+ and –) marked on the battery holder.  
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4. Slide the battery holder or battery pack into the com-  
partment.  
Caution: The battery holder or battery pack fits only  
one way inside the battery compartment. Do not  
force it.  
5. Replace the cover.  
If BATT flashes on the display, immediately replace all six  
non-rechargeable batteries, remove and recharge all six  
rechargeable batteries, or recharge the battery pack. See  
“Charging a Rechargeable Battery Pack” on Page 13.  
Caution: Always dispose of old batteries promptly and  
properly. Do not bury or burn them.  
Using Standard AC Power  
To power the scanner from AC power, you need an AC  
adapter such as RadioShack Cat. No. 273-1665. Plug the  
adapter’s barrel plug into the scanner’s PWR/DC 9V jack.  
Then plug the adapter’s power module into a standard AC  
outlet.  
PWR/DC 9V  
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Warning: Do not use an AC adapter’s polarized plug with  
an extension cord, receptacle, or other outlet unless the  
blades can be fully inserted to prevent blade exposure.  
Cautions:  
• You must use an AC adapter that supplies 9 volts  
and delivers at least 300 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.  
• When you finish using the AC adapter, disconnect it  
from the AC outlet first. Then disconnect it from the  
scanner.  
Using Vehicle Battery Power  
To power the scanner from your vehicle’s cigarette lighter  
socket, you need a DC Adapter, such as Cat. No. 270-  
1560.  
Cautions:  
• You must use a DC adapter that supplies (regulated)  
9-volt power and delivers at least 300 milliamps. Its  
center tip must be set to negative, and its plug must  
correctly fit the scanner’s PWR/DC 9V jack. The rec-  
ommended adapter meets these specifications.  
Using an adapter that does not meet these specifica-  
tions could damage the scanner or the adapter.  
To protect your vehicle’s electrical system, always  
plug the adapter into the scanner before you plug it  
into your vehicle’s cigarette-lighter socket. Always  
unplug the adapter from the vehicle’s cigarette-  
lighter socket before you unplug it from the scanner.  
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3
2
1
1. Connect the DC adapter’s orange barrel plug to the  
adapter’s cable, with the tip set to – (negative).  
2. Set the adapter’s voltage switch to 9V.  
3. Insert the barrel plug into the scanner’s PWR/DC 9V  
jack.  
4. Plug the other end of the adapter into your vehicle’s  
cigarette-lighter socket.  
Note: If the scanner does not operate properly when you  
connect a DC adapter, unplug the adapter from the ciga-  
rette-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 scanner battery pack (Cat. No. 23-  
288, not supplied) while it is in the scanner. To charge a  
battery pack, simply connect an appropriate AC or DC  
adapter to the PWR/DC 9V jack.  
Note: If you want to take the battery pack out of the scan-  
ner to charge it, follow the instructions provided with the  
battery pack.  
It takes about 14-16 hours to recharge a battery pack that  
is fully discharged. You can operate the scanner while re-  
charging the battery pack, but the charging time is length-  
ened.  
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Note: A rechargeable battery pack lasts longer and deliv-  
ers more power if you occasionally let it fully discharge. To  
do this, simply use the scanner until BATT appears on the  
display. Then fully charge the battery pack.  
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 man-  
agement authorities for information on recycling or dispos-  
al programs in your area. Some options that might be  
available are: municipal curb-side collection, drop-off box-  
es at retailers, recycling collection centers, and mail-back  
programs.  
CONNECTING THE ANTENNA  
Follow these steps to attach the supplied flexible antenna  
to the ANT jack on the top of your scanner.  
1. Align the slots around the antenna’s connector with  
the tabs on the ANT jack.  
2. Press the antenna down over the jack and turn the  
antenna’s base clockwise until it locks into place.  
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Connecting an Optional Antenna  
The antenna connector on your 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 cable does not have a BNC connector, you will  
also need a BNC adapter (also available at your local Ra-  
dioShack store).  
Follow the installation instructions supplied with the anten-  
na, route the antenna cable to the scanner, then connect  
it to the ANT jack.  
Warning: Use extreme caution when installing or remov-  
ing 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, ca-  
ble or guy wires can cause electrocution and death! Call  
the power company to remove the antenna. Do not at-  
tempt to do so yourself.  
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CONNECTING AN EARPHONE/  
HEADPHONES  
For private listening, you can plug an earphone or mono  
headphones (such as Cat. No. 33-175 or 20-210) into the  
jack on top of your scanner. This automatically dis-  
connects 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 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 might still  
damage your hearing.  
Traffic Safety  
Do not wear an earphone or headphones while you drive  
a vehicle or ride a bicycle. This can create a traffic hazard  
and can be illegal in some areas.  
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Even though some earphones and headphones let you  
hear some outside sounds when you listen at normal lev-  
els, they still can present a traffic hazard.  
CONNECTING AN EXTENSION  
SPEAKER  
In a noisy area, an extension speaker (such as Cat. No.  
21-549) or an amplified speaker (such as Cat. No. 21-  
541), positioned in the right place, might provide more  
comfortable listening. Plug the speaker cable’s 1/8-inch  
mini-plug into your scanner’s  
jack.  
USING THE BELT CLIP  
You can use the belt clip attached to the back of the scan-  
ner for hands-free carrying when you are on the go. Sim-  
ply slide the belt clip over your belt or waistband.  
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UNDERSTANDING THE PRO-70  
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 10  
preprogrammed  
channels.  
weather  
BAND  
— selects a prepro-  
grammed search band.  
SCAN  
— scans through the  
programmed channels.  
MANUAL  
— stops scanning and lets you directly enter a  
channel number.  
/
— begins searching up or down for active frequen-  
cies, or selects the direction when you scan channels.  
CLEAR  
— clears an incorrect entry.  
PGM  
— programs frequencies into channels.  
— locks/unlocks the keypad to prevent accidental en-  
tries.  
LIGHT  
— turns on/off the display’s backlight.  
1 9  
Number Keys ( - ) — enter a channel/frequency number.  
0/MON  
— enters a zero or accesses the monitor memory.  
./DLY  
— enters a decimal point (necessary when program-  
ming frequencies), or programs a 2-second delay for the  
selected channel.  
E/L-OUT  
— (enter/lockout) enters frequencies into chan-  
nels, or locks out channels so they will not be scanned.  
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A LOOK AT THE DISPLAY  
The display has indicators that show the scanner’s current  
operation. A quick look at the display will help you under-  
stand how to operate your scanner.  
MAN — appears when you manually select a channel.  
SCAN — appears when you scan channels.  
WX — appears when you scan or manually search the 10  
preprogrammed weather channels.  
MON — appears when you listen to the monitor memory.  
BATT — appears when the batteries are low.  
L/O — appears when you manually select a channel you  
locked-out while scanning.  
SRCH — appears during band and direct frequency  
searches.  
/
— indicate the search or scan direction.  
DELAY — appears when you program a 2-second delay  
for a channel.  
PGM — appears while you program frequencies into the  
scanner’s channels.  
— appears when you lock the keypad.  
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ch — the digits that precede this indicator (150) show  
which channel the scanner is tuned to.  
–d — appears during a direct frequency search.  
000.0000 — the digits in the middle of the display show  
which frequency the scanner is tuned to.  
Error — appears when you make an entry error.  
dUPL — (duplicate) appears when you try to store a fre-  
quency that is already stored in another channel.  
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OPERATION  
TURNING ON THE SCANNER AND  
SETTING SQUELCH  
SQUELCH  
1. Turn  
fully counterclockwise before you  
turn on the scanner.  
VOLUME  
SQUELCH  
MIN MAX  
OFF  
MAX  
VOLUME  
2. Turn  
clockwise until you hear a hissing  
sound.  
VOLUME  
SQUELCH  
MIN MAX  
OFF  
MAX  
SQUELCH  
3. Turn  
clockwise, just until the hissing sound  
stops.  
Note:  
SQUELCH  
SQUELCH  
To listen to a weak or distant station, turn  
counterclockwise. If reception is poor, turn  
clockwise to cut out weak transmissions.  
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SEARCHING FOR AND STORING  
ACTIVE FREQUENCIES  
Your scanner can store up to 51 frequencies. Each fre-  
quency can be stored in either a memory called a channel,  
or the temporary memory called a monitor. This scanner  
has 50 channels and one monitor memory.  
You can store frequencies using any of these methods.  
• Manually enter and store a specific frequency (see  
“Storing Frequencies” on Page 23).  
• Search for active frequencies within a range of pre-  
programmed frequencies and store selected fre-  
quencies in the scanner’s channel memories (see  
“Using Band Search” on Page 25).  
• Search for active frequencies starting directly from  
one specific frequency and store a frequency in the  
scanner’s monitor memory (see “Using Direct  
Search” on Page 27).  
• Recall the monitor memory frequency and move that  
frequency to a channel memory (see “Using the  
Monitor Memory” on Page 28).  
Active Frequency References  
Good references for active frequencies are RadioShack’s  
Beyond Police Call, Police Call Radio Guide Including Fire  
and Emergency Services, Aeronautical Frequency Direc-  
tory, and Radio! magazine. We update these references  
often, so be sure to get a current copy.  
If you do not have a reference to frequencies in your area,  
or if you want to search for unlisted frequencies, use a  
band search or direct search. See also “Guide to the Ac-  
tion Bands” on Page 37 in this manual.  
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Storing Frequencies  
Follow these steps to store frequencies into your scan-  
ner’s channels.  
1. Press PGM. PGM appears on the display to indicate  
the scanner is in the programming mode.  
2. Use the number keys to enter the channel number  
(1-50) where you want to store the frequency, then  
press PGM again. Or, repeatedly press PGM until the  
desired channel number appears.  
Notes:  
If you enter an invalid channel number, Error  
appears on the display. Simply repeat this step.  
If a frequency is currently stored in the selected  
channel, the channel number does not flash but  
the current frequency number appears on the dis-  
play. You can either repeat this step to select a dif-  
ferent channel, or replace the current frequency  
with a new one.  
3. Use the number keys and ./DLY to enter the fre-  
quency (including the decimal point) you want to  
store in that channel.  
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4. Press E/L-OUT to store the frequency. The selected  
channel number stops flashing, indicating that the  
selected channel is stored.  
Notes:  
If you entered an invalid frequency in Step 3,  
Error appears on the display after you press E/  
L-OUT. Simply repeat Steps 3 and 4 and enter a  
valid frequency in Step 3.  
Your scanner automatically rounds the entered  
frequency down to the nearest valid frequency.  
For example, if you try to enter a frequency of  
151.4730, your scanner accepts it as 151.4700.  
If you entered a frequency that is already stored in  
another channel, dUPL (duplicate) and the low-  
est-numbered channel containing the duplicate  
frequency flash on the display for about 3 sec-  
onds.  
To store the duplicate frequency, press E/L-OUT  
again. To store a different frequency, repeat Steps  
3 and 4, and enter a different frequency in Step 3.  
5. Repeat Steps 2-4 to program another channel.  
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Using Band Search  
If you do not know of a frequency to store, you can search  
your scanner’s preprogrammed search bands for active  
frequencies, then store any that you find into your scan-  
ner’s channels.  
Follow these steps to search for and store active frequen-  
cies using band search.  
1. Press BAND. The last selected band number (b fol-  
lowed by a number, such as b2) and the associated  
frequency search range appear on the display.  
2. To select a different band, within 2 seconds, enter  
the desired band number (0-9, see Page 4 for  
descriptions) or repeatedly press BAND until the  
desired band number appears on the display. After  
about 2 seconds, SRCH  
appears, the next avail-  
able channel flashes, and the scanner begins  
searching rapidly upward in that band (from lowest to  
highest frequency) for an active frequency.  
Notes:  
To select a different band after the scanner begins  
searching the current band, simply repeat this  
step.  
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To reverse the rapid search direction at any time,  
press and hold or for about 1second.  
To search the selected band upward or downward  
in small increments (in steps of 5 or 12.5 kHz,  
depending on the band), press and release  
so or disappears from the display. See  
“Specified Intervals” on Page 39.  
or  
3. When the scanner finds an active frequency, it stops  
scanning and displays that frequency’s number. To  
store that frequency in the channel currently flashing  
on the display, simply press E/L-OUT. The scanner  
stores the frequency, then the next available channel  
flashes on the display.  
Notes:  
You cannot store an active frequency in the moni-  
tor memory during band search.  
After you store a frequency into the last available  
channel, --ch appears instead of a channel  
number. If you try to store a channel while --ch  
appears, Ch FULL appears briefly on the display.  
In order to store more frequencies, you must clear  
some channels. See “Clearing a Stored Channel”  
on Page 31.  
4. To search for another active frequency in the  
selected band, press and hold  
second, then repeat Step 3.  
or  
for about 1  
To select a different band then search for another  
active frequency, repeat Steps 2 and 3.  
26  
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Using Direct Search  
During a direct search, the scanner searches upward or  
downward, starting from a frequency you specify. Follow  
these steps to use direct search.  
1. Press MANUAL or PGM, then enter the frequency you  
want to use as a starting point for the search.  
Note: To start from a frequency already stored in one  
of your scanner’s channels, press MANUAL or PGM,  
enter the desired channel number, then press MAN-  
UAL or PGM again.  
2. Press and hold or for about 1 second to search  
upward or downward. –d, SRCH, and or appear  
on the display.  
3. When the scanner stops on an active frequency, you  
can either:  
Press 0/MON to store it in the monitor memory.  
Press and hold or to continue the search.  
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USING THE MONITOR MEMORY  
After you store a frequency in the scanner’s monitor mem-  
ory during a direct search, you can recall it and move it to  
one of your scanner’s channel memories.  
Listening to the Monitor Memory  
To recall a frequency stored in the monitor memory, sim-  
ply press MANUAL then 0/MON. MAN then MON and the  
stored frequency appear on the display.  
Moving a Frequency from the Monitor  
Memory to a Channel  
1. Press MANUAL, enter the channel number where  
you want to store the frequency, then press PGM.  
PGM and the selected channel number appear on  
the display.  
2. Press MON. MON and the monitor memory frequency  
appear on the display.  
3. Press E/L-OUT. MON disappears, the channel number  
stops flashing, and the frequency is stored in the  
selected channel.  
28  
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SCANNING THE STORED  
CHANNELS  
To set the scanner to continuously scan through all chan-  
nels with stored frequencies, simply press SCAN. SCAN  
and  
appear on the display, and the scanner begins to  
rapidly scan upward until it finds an active frequency.  
If the scanner finds an active frequency, it stops and dis-  
plays that channel and frequency number, then it automat-  
ically begins scanning again when the transmission ends  
on that frequency.  
Notes:  
To reverse the scanning direction, press or  
.
To set the scanner to remain on the current channel  
for 2 seconds after the transmission ends, see  
“Using a 2-Second Delay” on Page 33.  
To set the scanner to remain on the current channel,  
even after the transmission stops, press MANUAL at  
any time during the transmission so MAN appears  
and SCAN disappears from the display (see “Moni-  
toring a Stored Channel” on Page 30).  
To lock out channels so the scanner does not stop  
for a transmission on those channels, see “Locking  
Out Channels” on Page 32.  
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MONITORING A STORED CHANNEL  
You can continuously monitor a specific channel without  
scanning. This is useful if you hear an emergency broad-  
cast on a channel and do not want to miss any details —  
even though there might be periods of silence — or if you  
simply want to monitor that channel.  
Follow these steps to manually select a channel.  
1. Press MANUAL.  
2. Enter the channel number.  
3. Press MANUAL again.  
30  
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CLEARING A STORED CHANNEL  
If you no longer want a frequency stored in a channel  
(and you do not want to replace that frequency with a dif-  
ferent one), follow these steps to clear the stored fre-  
quency.  
1. Select the channel that you want to clear.  
2. Press PGM. PGM appears on the display.  
3. Press CLEAR. The frequency number flashes on the  
display.  
4. Press E/L-OUT. L/O (lockout — see “Locking Out  
Channels” on Page 32) appears, the channel num-  
ber flashes, and the frequency number changes to  
000.0000 on the display to indicate the channel is  
cleared.  
5. To clear another channel, use the number keys to  
enter that channel number (1-50), then press PGM  
again. Or, repeatedly press PGM until the desired  
channel number appears. Then repeat Steps 3-4.  
31  
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SPECIAL FEATURES  
USING THE KEYLOCK  
Once you program your scanner, you can protect it from  
accidental program changes by turning on the keylock  
feature. When the keypad is locked, the only controls that  
LIGHT  
operate are  
VOLUME  
(see “Using the Display Backlight” on  
SQUELCH  
Page 34),  
, and  
.
Note:  
The keylock does not prevent the scanner from  
scanning channels or monitoring a single channel, which-  
ever feature you last selected.  
To turn on the keylock, press and hold  
for about 3  
appears on the display. To turn it off,  
for about 3 seconds until disap-  
seconds until  
press and hold  
pears from the display.  
LOCKING OUT CHANNELS  
You can increase the effective scanning speed by locking  
out individual channels that have a continuous transmis-  
sion, such as a weather channel (see “National Weather  
Frequencies” on Page 36) or birdie frequency (see “Birdie  
Frequencies” on Page 37). To lock out a channel, select  
E/L-OUT  
that channel then press  
play.  
. L/O appears on the dis-  
32  
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To remove the lock-out from a channel, select that chan-  
nel again, then press E/L-OUT so L/O disappears from the  
display.  
Notes:  
• You can manually select locked-out channels.  
• Your scanner automatically locks out empty chan-  
nels.  
USING A 2-SECOND DELAY  
Many agencies use a two-way radio system that has a pe-  
riod of several seconds between a query and a reply. To  
avoid missing a reply, you can program a 2-second delay  
into any channel or frequency. When your scanner stops  
on a channel or frequency with a programmed delay, DE-  
LAY appears on the display and the scanner continues to  
monitor that frequency for 2 seconds after the transmis-  
sion stops before resuming scanning.  
You can program a 2-second delay in these three ways:  
• If the scanner is scanning and stops on an active  
channel, quickly press ./DLY before it continues scan-  
ning again.  
• If the desired channel is not selected, manually  
select the channel, then press ./DLY.  
33  
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20-310.fm Page 34 Wednesday, August 4, 1999 10:49 AM  
• If the scanner is in the search mode, press ./DLY  
while the scanner is searching. DELAY appears on  
the display and the scanner automatically adds a 2-  
second delay to every transmission it stops on.  
To turn off the 2-second delay, press ./DLY while the scan-  
ner is monitoring the channel or frequency. DELAY disap-  
pears from the display.  
USING THE DISPLAY BACKLIGHT  
You can turn on the display’s backlight for easy viewing in  
the dark. Press LIGHT to turn on the display light for 5 sec-  
onds. To turn off the light before 5 seconds elapse, press  
LIGHT again.  
LISTENING TO A WEATHER BAND  
The FCC (Federal Communications Commission) has al-  
located 11 channels for use by the National Oceanic and  
Atmospheric Administration (NOAA). NOAA broadcasts  
your local forecast and regional weather information on  
one or more of these channels. We have programmed  
your scanner with 10 of the U.S. frequencies most com-  
monly used by NOAA.  
34  
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To hear your local forecast and regional weather informa-  
tion, simply press WX. Your scanner begins to scan  
through the weather band, and  
and WX appear on the  
display. To reverse the scanning direction, press or  
.
Your scanner should stop within a few seconds on your lo-  
cal weather broadcast. If the broadcast is weak, you can  
press or again to resume scanning.  
Note: To manually select a preprogrammed weather  
channel, you can:  
• repeatedly press WX until MAN appears on the dis-  
play, then repeatedly press  
or  
to move forward  
or backward through the channels.  
• press the number (0-9) of the channel you want to lis-  
ten to.  
35  
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20-310.fm Page 36 Wednesday, August 4, 1999 10:49 AM  
A GENERAL SCANNING GUIDE  
Reception of the frequencies covered by your scanner is  
mainly “line-of-sight.” This means you usually cannot hear  
stations that are beyond the horizon.  
GUIDE TO FREQUENCIES  
National Weather Frequencies  
161.650  
162.440*  
162.525  
161.775  
162.450  
162.550  
162.400  
162.475  
163.275  
162.425  
162.500  
*Not preprogrammed in this scanner, but you can manual-  
ly program it.  
Ham Radio Frequencies  
Ham radio operators often transmit emergency informa-  
tion when other means of communication break down.  
The following chart shows the frequencies this scanner re-  
ceives that Ham radio operators normally use:  
Wavelength  
(meters)  
Frequency  
(MHz)  
10-meter  
6-meter  
2-meter  
70-cm  
29.000–29.700  
50.000–54.000  
144.000–148.000  
420.000–450.000  
Note:  
Your scanner cannot receive AM transmissions on  
these bands.  
36  
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Birdie Frequencies  
Every scanner has birdie frequencies. Birdies are signals  
created inside the scanner’s receiver. These operating  
frequencies might interfere with broadcasts on the same  
frequencies. If you program one of these frequencies, you  
hear only noise on that frequency. If the interference is not  
severe, you might be able to turn SQUELCH clockwise to  
cut out the birdie.  
The birdie frequencies on this unit to watch for are:  
29.900  
32.090  
30.455  
32.530  
30.735  
33.580  
31.480  
38.400  
51.200  
144.000  
160.000  
51.225  
147.200  
162.200  
140.800  
153.600  
166.400  
143.430  
156.800  
To find the birdies in your scanner, begin by disconnecting  
the antenna and moving it away from the receiver. Make  
sure that no other nearby radio or TV sets are turned on  
near the scanner. Use the search function and scan every  
frequency band from its lowest frequency to the highest.  
Occasionally, the searching will stop as if it had found a  
signal, often without any sound. That is a birdie. Make a  
list of all the birdies in your particular scanner for future  
reference.  
GUIDE TO THE ACTION BANDS  
United States Broadcast Bands  
In the United States, there are several broadcast bands.  
The standard AM and FM bands are probably the most  
well known. There are also four television audio broadcast  
bands — the lower three transmit on the VHF band and  
the fourth transmits on the UHF band.  
37  
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20-310.fm Page 38 Wednesday, August 4, 1999 10:49 AM  
Typical Band Usage  
HF Band (3.00–30.0 MHz)  
10-Meter Amateur  
High Range  
29.00–29.70 MHz  
29.70–29.90 MHz  
VHF Band (30.00–300.0 MHz)  
Low Range  
6-Meter Amateur  
U.S. Government  
2-Meter Amateur  
High Range  
30.00–50.00 MHz  
50.00–54.00 MHz  
137.00–144.00 MHz  
144.00–148.00 MHz  
148.00–174.00 MHz  
UHF Band(300.00 MHz–3.0 GHz)  
Military Aircraft  
U.S. Government  
70-Centimeter Amateur  
Low Range  
380.00–384.00 MHz  
406.00–420.00 MHz  
420.00–450.00 MHz  
450.00–470.00 MHz  
FM-TV Audio Broadcast,  
Wide Band  
470.00–512.00 MHz  
Primary Usage  
As a general rule, most of the radio activity is concentrated  
on the following frequencies:  
VHF Band  
Activities  
Frequencies (MHz)  
Government, Police, and Fire  
Emergency Services  
Railroad  
153.785–155.980  
158.730–159.460  
160.000–161.900  
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20-310.fm Page 39 Wednesday, August 4, 1999 10:49 AM  
UHF Band  
Activities  
Frequencies (MHz)  
Land-Mobile  
“Paired” Frequencies  
Base Stations  
Mobile Units  
Relay Repeater Units  
Remote Control Stations  
450.000–470.000  
451.025–454.950  
456.025–459.950  
460.025–464.975  
465.025–469.975  
Note: Remote control stations and mobile units operate at  
5 MHz higher than their associated base stations and re-  
lay repeater units.  
Specified Intervals  
Frequencies in different bands are accessible only at spe-  
cific intervals. For example:  
Frequency Range(s)  
Specified Interval  
29–54 and 137–144 MHz  
380–512  
5.0 kHz steps  
12.5 kHz steps  
Note: Your scanner automatically rounds the entered fre-  
quency down to the closest valid frequency. For example,  
if you try to enter 151.473, your scanner accepts this as  
151.470.  
39  
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20-310.fm Page 40 Wednesday, August 4, 1999 10:49 AM  
BAND ALLOCATION  
To help decide which frequency ranges to scan, use the  
following listing of the typical services that use the fre-  
quencies your scanner receives. These frequencies are  
subject to change, and might vary from area to area. For  
a more complete listing, refer to Police Call Radio Guide  
Including Fire and Emergency Services, available at your  
local RadioShack store.  
Abbreviations  
Services  
AIR.........................................................................Aircraft  
BIFC............................Boise (ID) Interagency Fire Cache  
BUS ....................................................................Business  
CAP ............................................................Civil Air Patrol  
CB...............................................................Citizens Band  
CCA ........................................................Common Carrier  
CSB .............................................. Conventional Systems  
CTSB .............................. Conventional/Trunked Systems  
FIRE........................................................ Fire Department  
HAM............................................... Amateur (Ham) Radio  
GOVT............................................... Federal Government  
GMR .............................................. General Mobile Radio  
GTR ....................................................... General Trunked  
IND.......................................................Industrial Services  
(Manufacturing, Construction, Farming, Forest Products)  
MAR..............................................Military Amateur Radio  
MARI............................................ Maritime Limited Coast  
(Coast Guard, Marine telephone,  
Shipboard Radio, Private stations)  
MARS ................................Military Affiliate Radio System  
MED....................................Emergency/Medical Services  
MIL.................................................................U.S. Military  
MOV................................... Motion Picture/Video Industry  
NEW ..................................................New Mobile Narrow  
NEWS.......................Relay Press (Newspaper reporters)  
OIL.................................................Oil/Petroleum Industry  
POL......................................................Police Department  
PUB ..........................................................Public Services  
(Public Safety, Local Govt., Forestry Conservation)  
PSB.............................................................. Public Safety  
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PTR..........................................................Private Trunked  
ROAD................................Road & Highway Maintenance  
RTV......................... Radio/TV Remote Broadcast Pickup  
TAXI .............................................................Taxi Services  
TELB.....................................................Mobile Telephone  
(Aircraft, Radio Common Carrier, Landline companies)  
TELC......................................................Cordless Phones  
TELM ..........................................Telephone Maintenance  
TOW................................................................Tow Trucks  
TRAN .......................................... Transportation Services  
(Trucks, Tow Trucks, Buses, Railroad, Other)  
TSB....................................................... Trunked Systems  
TVn .............................................FM-TV Audio Broadcast  
USXX ............................................Government Classified  
UTIL ............................................. Power & Water Utilities  
WTHR ................................................................. Weather  
High Frequency (HF) Hi — (3 MHz–30 MHz)  
10-Meter Amateur Band— (28.0–29.7 MHz)  
29.000–29.700..........................................................HAM  
Very High Frequency (VHF) — (30 MHz–300 MHz)  
Low Band — (29.7–50 MHz — in 5 kHz steps)  
29.700–29.790............................................................IND  
29.900–30.550................................................ GOVT, MIL  
30.580–31.980.................................................. IND, PUB  
32.000–32.990................................................ GOVT, MIL  
33.020–33.980.........................................BUS, IND, PUB  
34.010–34.990................................................ GOVT, MIL  
35.020–35.980............................. BUS, PUB, IND, TELM  
36.000–36.230................................................ GOVT, MIL  
36.250...................................................Oil Spill Clean-Up  
36.270–36.990................................................ GOVT, MIL  
37.020–37.980.................................................. PUB, IND  
38.000–39.000................................................ GOVT, MIL  
39.020–39.980...........................................................PUB  
40.000–42.000..................................... GOVT, MIL, MARI  
42.020–42.940...........................................................POL  
42.960–43.180............................................................IND  
43.220–43.680.......................................TELM, IND, PUB  
43.700–44.600........................................................ TRAN  
44.620–46.580................................................. POL, PUB  
46.600–46.990............................................. GOVT, TELC  
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47.020–47.400...........................................................PUB  
47.420..............................................American Red Cross  
47.440–49.580...................................................IND, PUB  
49.610–49.990................................................. MIL, TELC  
6-Meter Amateur Band — (50–54 MHz)  
50.00–54.00.............................................................. HAM  
U.S. Government Band (138–144 MHz)  
137.000–144.000............................................ GOVT, MIL  
2-Meter Amateur Band (144–148 MHz)  
144.000–148.000...................................................... HAM  
VHF-Hi BAND (148–174 MHz)  
148.050–150.345..................................... CAP, MAR, MIL  
150.775–150.790...................................................... MED  
150.815–150.965......................................................TOW  
150.980.................................................Oil Spill Clean Up  
150.995–151.130....................................................ROAD  
151.145–151.475.......................................................POL  
151.490–151.955...............................................IND, BUS  
151.985....................................................................TELM  
152.0075................................................................... MED  
152.030–152.240..................................................... TELB  
152.270–152.465.............................................. IND, TAXI  
152.480......................................................................BUS  
152.510–152.840..................................................... TELB  
152.870–153.020..............................................IND, MOV  
153.035–153.725...................................... IND, OIL, UTIL  
153.740–154.445.............................................PUB, FIRE  
154.490–154.570...............................................IND, BUS  
154.585.................................................Oil Spill Clean-Up  
154.600–154.625.......................................................BUS  
154.655–156.240....................... MED, ROAD, POL, PUB  
156.255....................................................................... OIL  
156.275–157.425..................................................... MARI  
157.450..................................................................... MED  
157.470–157.515......................................................TOW  
157.530–157.725.............................................. IND, TAXI  
157.740......................................................................BUS  
157.770–158.100..................................................... TELB  
158.130–158.460................. BUS, IND, OIL, TELM, UTIL  
158.490–158.700..................................................... TELB  
158.730–159.465................................. POL, PUB, ROAD  
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20-310.fm Page 43 Wednesday, August 4, 1999 10:49 AM  
159.480....................................................................... OIL  
159.495–161.565.................................................... TRAN  
161.580....................................................................... OIL  
161.600–162.000............................................MARI, RTV  
162.0125–162.35................................ GOVT, MIL, USXX  
162.400–162.550................................................... WTHR  
162.5625–162.6375............................ GOVT, MIL, USXX  
162.6625................................................................... MED  
162.6875–163.225.............................. GOVT, MIL, USXX  
163.250.....................................................................MED  
163.275–166.225................................ GOVT, MIL, USXX  
166.250................................................ GOVT, RTV, FIRE  
166.275–169.400..........................................GOVT, BIFC  
169.445.......................................................Wireless Mics  
169.500...................................................................GOVT  
169.505.......................................................Wireless Mics  
169.55–169.9875................................ GOVT, MIL, USXX  
170.000.....................................................................BIFC  
170.025–170.150................................. GOVT, RTV, FIRE  
170.175–170.225....................................................GOVT  
170.245–170.305........................................Wireless Mics  
170.350–170.400............................................ GOVT, MIL  
170.425–170.450......................................................BIFC  
170.475......................................................................PUB  
170.4875–173.175.................GOVT, PUB, Wireless Mics  
173.225–173.375................................MOV, NEWS, UTIL  
173.3875–173.5375.................................................... MIL  
173.5625–173.5875.................MIL Medical/Crash Crews  
173.60–173.9875....................................................GOVT  
Ultra High Frequency (UHF) (300 MHZ–3 GHz)  
Military Aircraft Band (319.1–383.9 MHz)  
380.000–383.900..........................................Coast Guard  
U. S. Government Band (406–450 MHz)  
406.125–419.975........................................ GOVT, USXX  
70-cm Amateur Band (420–450 MHz)  
420.000–450.000......................................................HAM  
Low Band (450–470 MHz)  
450.050–450.925.......................................................RTV  
451.025–452.025...........................IND, OIL, TELM, UTIL  
452.0375–453.00............ IND, TAXI, TRAN TOW, NEWS  
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453.0125–453.9875...................................................PUB  
454.000....................................................................... OIL  
454.025–454.975..................................................... TELB  
455.050–455.925.......................................................RTV  
457.525–457.600.......................................................BUS  
458.025–458.175...................................................... MED  
460.0125–460.6375............................... FIRE, POL, PUB  
460.650–462.175.......................................................BUS  
462.1875–462.450.............................................BUS, IND  
462.4625–462.525.........................IND, OIL, TELM, UTIL  
462.550–462.725......................................................GMR  
462.750–462.925.......................................................BUS  
462.9375–463.1875.................................................. MED  
463.200–467.925.......................................................BUS  
FM-TV Audio Broadcast,  
UHF Wide Band (470–512 MHz)  
(Channels 14 through 20 in 6 MHz steps)  
475.750...........................................................Channel 14  
481.750...........................................................Channel 15  
487.750...........................................................Channel 16  
493.750...........................................................Channel 17  
499.750...........................................................Channel 18  
505.750...........................................................Channel 19  
512.000...........................................................Channel 20  
Note: Some cities use the 470–512 MHz band for land/  
mobile service.  
44  
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AVOIDING IMAGE FREQUENCIES  
You might discover one of your regular stations on anoth-  
er frequency that is not listed. This might be what is known  
as an image frequency. For example, you might find a ser-  
vice that regularly uses a frequency of 453.275 also on  
474.675.  
To see if it is an image, do a little math.  
Note the new frequency.  
474.675  
Double the intermediate frequency  
of 10.7 MHz (21.400) and subtract it  
from the new frequency.  
–21.400  
453.275  
If the answer is the regular frequency,  
then you have tuned to an image.  
Occasionally you might get interference on a weak or dis-  
tant channel from a strong broadcast 21.4 MHz below the  
tuned frequency. This is rare, and the image signal is usu-  
ally cleared whenever there is a broadcast on the actual  
frequency.  
45  
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20-310.fm Page 46 Wednesday, August 4, 1999 10:49 AM  
FREQUENCY CONVERSION  
The tuning location of a station can be expressed in fre-  
quency (kHz or MHz) or in wavelength (meters). The fol-  
lowing information can help you make the necessary  
conversions.  
1 MHz (million) = 1,000 kHz (thousand)  
To convert MHz to kHz, multiply the number of MHz by  
1,000:  
30.62 MHz × 1000 = 30,620 kHz  
To convert from kHz to MHz, divide the number of kHz by  
1,000.  
127,800 kHz ÷ 1000 = 127.8 MHz  
To convert MHz to meters, divide 300 by the number of  
MHz.  
300 ÷ 50 MHz = 6 meters  
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20-310.fm Page 47 Wednesday, August 4, 1999 10:49 AM  
TROUBLESHOOTING  
If your scanner is not working as it should, these sugges-  
tions might help you eliminate the problem. If the scanner  
still does not operate properly, take it to your local Ra-  
dioShack store for assistance.  
POSSIBLE  
CAUSES  
PROBLEM  
REMEDIES  
Scanner is  
totally inop-  
erative.  
The batteries  
are dead.  
Replace the batter-  
ies with fresh ones  
or recharge the bat-  
tery pack.  
The optional  
AC or DC  
power adapter  
is not con-  
nected.  
Be sure the adapter  
is fully inserted into  
PWR/DC 9V  
the  
jack.  
Poor or no  
reception  
Improperly  
connected  
antenna.  
Be sure the  
antenna is properly  
connected.  
Programmed  
Avoid program-  
frequencies are ming frequencies  
the same as  
birdie frequen-  
cies.  
listed under “Birdie  
Frequencies” on  
Page 37 or only  
select them manu-  
ally.  
Error  
appears on  
the display.  
Programming  
error.  
Reprogram the fre-  
quency correctly.  
Keypad  
does not  
work.  
Keylock is  
turned on.  
Turn off keylock.  
47  
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20-310.fm Page 48 Wednesday, August 4, 1999 10:49 AM  
POSSIBLE  
CAUSES  
PROBLEM  
REMEDIES  
Keys do not  
work or dis-  
play  
Undetermined  
error.  
Turn the scanner  
off then on again,  
or reset the scan-  
ner (see “Reset-  
ting/Initializing the  
Scanner” on Page  
49).  
changes.  
Scanner is  
on but will  
not scan.  
SQUELCH is not  
correctly  
adjusted.  
Adjust SQUELCH  
clockwise (see  
“Turning On the  
Scanner and Set-  
ting SQUELCH” on  
Page 21).  
In the scan  
mode, the  
scanner  
locks on fre-  
quencies  
that have an  
unclear  
Birdies.  
Avoid program-  
ming frequencies  
listed under “Birdie  
Frequencies” on  
Page 37 or only lis-  
ten to them manu-  
ally.  
transmis-  
sion.  
48  
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20-310.fm Page 49 Wednesday, August 4, 1999 10:49 AM  
RESETTING/INITIALIZING THE  
SCANNER  
If the scanner’s display locks up or does not work properly  
after you connect a power source, you might need to reset  
or initialize the scanner.  
IMPORTANT!  
If you have problems, first try to reset the  
scanner (see “Resetting the Scanner”). If that does not  
work, you can initialize the scanner (see “Initializing the  
Scanner” on Page 50); however, this clears all information  
stored in your scanner’s memory.  
Resetting the Scanner  
1. Turn off the scanner, then turn it on again.  
2. Insert a pointed object, such as a straightened paper  
clip, into the reset opening on the side of the scanner  
(as shown below) and gently press then release the  
reset button inside the opening.  
Note:  
If the scanner still does not work properly, you might  
need to initialize the scanner (see “Initializing the Scan-  
ner” on Page 50).  
49  
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20-310.fm Page 50 Wednesday, August 4, 1999 10:49 AM  
Initializing the Scanner  
Caution: This procedure clears all information you stored  
in the scanner’s memory. Initialize the scanner only when  
you are sure the scanner is not working properly.  
1. Turn off the scanner, then turn it on again.  
2. Press and hold CLEAR.  
3. While holding down CLEAR, insert a pointed object,  
such as a straightened paper clip, into the reset  
opening on the side of the scanner and gently press  
then release the reset button inside the opening.  
4. When the display reappears, release CLEAR.  
Note: You must release RESET before releasing CLEAR,  
otherwise the memory might not clear.  
50  
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20-310.fm Page 51 Wednesday, August 4, 1999 10:49 AM  
CARE AND MAINTENANCE  
To enjoy your RadioShack PRO-70 50-Channel Portable  
Scanner for a long time:  
Keep the scanner dry. If it gets wet, wipe it dry  
immediately. Liquids can contain minerals that  
can corrode the electronic circuits.  
Use only fresh batteries of the recommended  
size and type. Always remove old and weak  
batteries. They can leak chemicals that de-  
stroy electronic circuits.  
Handle the scanner gently and carefully. Drop-  
ping it can damage circuit boards and cases  
and can cause the scanner to work improperly.  
Use and store the scanner only in normal tem-  
perature environments. Temperature ex-  
tremes can shorten the life of electronic  
devices, damage batteries, and distort or melt  
plastic parts.  
Keep the scanner away from dust and dirt,  
which can cause premature wear of parts.  
Wipe the scanner with a damp cloth occasion-  
ally to keep it looking new. Do not use harsh  
chemicals, cleaning solvents, or strong deter-  
gents to clean the scanner.  
Modifying or tampering with the scanner’s internal compo-  
nents can cause a malfunction and might invalidate its  
warranty and void your FCC authorization to operate it. If  
your scanner is not operating as it should, take it to your  
local RadioShack store for assistance.  
51  
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20-310.fm Page 52 Wednesday, August 4, 1999 10:49 AM  
SPECIFICATIONS  
Frequency Coverage:  
Ham ............................... 29–30 MHz (5.0 kHz steps)  
VHF Lo .......................... 30–50 MHz (5.0 kHz steps)  
Ham ............................... 50–54 MHz (5.0 kHz steps)  
Government............... 137–144 MHz (5.0 kHz steps)  
Ham ........................... 144–148 MHz (5.0 kHz steps)  
VHF Hi....................... 148–174 MHz (5.0 kHz steps)  
Ham/Government .... 380–450 MHz (12.5 kHz steps)  
UHF Lo .................... 450–470 MHz (12.5 kHz steps)  
UHF Hi (T) ............... 470–512 MHz (12.5 kHz steps)  
Channels of Operation:................................ 50 Channels  
and 1 Monitor Memory  
Sensitivity (20 dB S/N):  
29–54 MHz ......................................................1.0 µV  
137–174 MHz ..................................................1.0 µV  
380–512 MHz ..................................................1.0 µV  
Selectivity:  
±10 kHz ........................................................... –6 dB  
±18 kHz ......................................................... –50 dB  
Spurious Rejection:  
29–54 MHz .................................... 50 dB at 40 MHz  
137–174 MHz .............................. 50 dB at 154 MHz  
Scanning Rate ........................Up to 25 channels/second  
Search Rate ................................. Up to 50 steps/second  
Delay Time ...................................................... 2 seconds  
Intermediate Frequencies (IF):  
1st.............................................................. 10.7 MHz  
2nd............................................................... 455 kHz  
IF Rejection: 10.7 MHz ....................... 70 dB at 154 MHz  
Squelch Sensitivity:  
Threshold....................................... Less than 1.0 µV  
Tight................................................... (S+N)/N 25 dB  
Antenna Impedance........................................... 50 Ohms  
52  
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20-310.fm Page 53 Wednesday, August 4, 1999 10:49 AM  
Audio Output Power (10%THD)........... 200 mW Nominal  
Built-in Speaker 13/8 Inch (36 mm) 8 ohm, Dynamic Type  
Power Requirements ..................+9 V DC, 6 AA batteries  
AC Adapter (Cat. No. 273-1665)  
DC Adapter (Cat. No. 270-1560)  
Rechargeable Battery Pack (Cat. No. 23-288)  
Current Drain (Squelched)......................................50 mA  
Dimensions (HWD) ................... 63/4 × 27/16 × 19/16 Inches  
(171 × 62 × 40 mm)  
Weight..................................................................... 8.1 oz  
(229 g)  
Supplied Accessory ............................................ Antenna  
Specifications are typical; individual units might vary.  
Specifications are subject to change and improvement  
without notice.  
53  
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20-310.fm Page 54 Wednesday, August 4, 1999 10:49 AM  
NOTES  
54  
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20-310.fm Page 55 Wednesday, August 4, 1999 10:49 AM  
55  
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20-310.fm Page 56 Wednesday, August 4, 1999 10:49 AM  
Limited One-Year Warranty  
This product is warranted by RadioShack against manufacturing defects in  
material and workmanship under normal use for one (1) year from the date of  
purchase from RadioShack company-owned stores and authorized Ra-  
dioShack franchisees and dealers. EXCEPT AS PROVIDED HEREIN, Ra-  
dioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED  
WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY AND FIT-  
NESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO  
THE DURATION OF THE WRITTEN LIMITED WARRANTIES CONTAINED  
HEREIN. EXCEPT AS PROVIDED HEREIN, RadioShack SHALL HAVE NO  
LIABILITY OR RESPONSIBILITY TO CUSTOMER OR ANY OTHER PER-  
SON OR ENTITY WITH RESPECT TO ANY LIABILITY, LOSS OR DAMAGE  
CAUSED DIRECTLY OR INDIRECTLY BY USE OR PERFORMANCE OF  
THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WARRANTY,  
INCLUDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM  
INCONVENIENCE, LOSS OF TIME, DATA, PROPERTY, REVENUE, OR  
PROFIT OR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUEN-  
TIAL DAMAGES, EVEN IF RadioShack HAS BEEN ADVISED OF THE POS-  
SIBILITY OF SUCH DAMAGES.  
Some states do not allow the limitations on how long an implied warranty lasts  
or the exclusion of incidental or consequential damages, so the above limita-  
tions or exclusions may not apply to you.  
In the event of a product defect during the warranty period, take the product  
and the RadioShack sales receipt as proof of purchase date to any Ra-  
dioShack store. RadioShack will, at its option, unless otherwise provided by  
law: (a) correct the defect by product repair without charge for parts and labor;  
(b) replace the product with one of the same or similar design; or (c) refund  
the purchase price. All replaced parts and products, and products on which a  
refund is made, become the property of RadioShack. New or reconditioned  
parts and products may be used in the performance of warranty service. Re-  
paired or replaced parts and products are warranted for the remainder of the  
original warranty period. You will be charged for repair or replacement of the  
product made after the expiration of the warranty period.  
This warranty does not cover: (a) damage or failure caused by or attributable  
to acts of God, abuse, accident, misuse, improper or abnormal usage, failure  
to follow instructions, improper installation or maintenance, alteration, light-  
ning or other incidence of excess voltage or current; (b) any repairs other than  
those provided by a RadioShack Authorized Service Facility; (c) consumables  
such as fuses or batteries; (d) cosmetic damage; (e) transportation, shipping  
or insurance costs; or (f) costs of product removal, installation, set-up service  
adjustment or reinstallation.  
This warranty gives you specific legal rights, and you may also have other  
rights which vary from state to state.  
RadioShack Customer Relations, Dept. W,  
100 Throckmorton St., Suite 600, Fort Worth, TX 76102  
We Service What We Sell  
3/97  
RadioShack  
A Division of Tandy Corporation  
Fort Worth, Texas 76102  
GE-95D-1652  
5A7  
Printed in Hong Kong  
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