Radio Shack PRO-74 User Guide

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Owner’s Manual

PRO-74 100-Channel

VHF/UHF/Air/800 MHz

Please read before using this equipment.

Cat. No. 20-513

Race Scanner

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 amateur radio. You can select up to 100 channels for your scanner to scan, and you can change any of those selections at any tim e.

We have included a frequency guide with your PRO-74 that includes listing s by state for many of the frequencies you can liste n to.

Your scanner has these special features:

Quick-Track Memory

quencies used by the driver’s team into the scanner’s channels. You can recall any of those frequencies by entering the car’s number.

— lets you store a car’s number and any fre-

Two Supplied Antennas

— let you select the antenna that best meets your needs. The supplied stub antenna helps your scanner receive strong local signals and makes the scanner easy to carry and use at events, whi le the supplied flexible a ntenna provides excellent reception and is designed to help prevent antenna breakage.

Twelve Service Banks

— lets you search preset frequencies in separate auto racing, marine, VHF, aircraft, military, ham radio, government, UHF, TV, and 800 MHz banks, to make it easy to locate specific types of calls.

Weather Search

— lets you easily search the scanner’s 7 prepro-

grammed weather frequencies.

Ten Memory Banks

— let you store 10 channels in each of 10 banks

to group channels so you can more easily identify calls.

Priority Channels

— lets you program one channel in each bank (10 in all) and then have the scanner check it every 2 seconds so you don' t miss transmissions on that channel.

1998 Tandy Corporation.

RadioShack is a registered trademark used by Tandy Corporation.

Hypersearch is a trademark used by Tandy Corporation.

Hypersearch — lets you set the scanner to s earch at up t o 300 steps per second, to help you quickly find interesting broadcasts. (The normal search speed is 100 steps per second).

Two-Second Scan Delay — automatically del ays scanni ng for about 2 seconds before moving to another channel, so you can hear more replies.

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.

Data Signal Skip — lets you set the scanner to skip non-modulated or data signals during searches. This lets the scanner avoid non-voice signals, making a search faster.

Search Skip — lets you set the scanner to skip up to 20 frequencies you select during searches. This lets the scanner avoid unwanted signals.

Three Power Options — let you power the scanner using alkaline or rech ar geab le nicke l-c ad mium ba tter ies , ext ern al A C p ower us ing an optional AC adapter/charger, or DC power using an optional DC adapter.

Memory Backup — keeps the frequencies stored in memory for up to 3 days if the PRO-74 loses power.

Key Confirmation Tones — t he scanner sound s a tone when you perform an operation correctly, and an error tone if you make an invalid entry. You can turn the key confirmation tone s on or off .

Display Backlight — makes the scanner easy to read in low-light situations.

Battery Low Alert — warns you when battery power gets low. Battery Save — saves battery power when the scanner does not de-

tect any transmissions for more than 5 seconds while a channel is manually select ed or whi le you are programming the scanner.

Key Lock — lets you lock the scanner's keys to help prevent accidental changes to the scanner's programming.

Resume Start — the scanner saves its settings when you turn the power off. This returns you to the function you were using if you accidentally turn the scanner off or the batter ies 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:

Frequency Range (MHz)

Step (kHz)

Transmission

29–29.7 5 10-Meter Ham Band

29.7–50 5 VHF Lo 50–54 5 6-Meter Ham Band 108–136.975 12.5 Aircraft/Ai r Shows 137–144 5 Auto Racing, Aircraft/Air

Shows, Government , Motion Picture/Video Industry, Pro Sports Teams, Radio/TV Remote Broadcast

Pickup, Stadi ums/Venues 144–148 5 2-Meter Ham Band 148–174 5 VHF Hi 406–450 12.5 70-cm Ham Band and

Federal Government 450–470 12.5 UHF Standard Band 470–512 12.5 UHF “T” Band 806–823.9375 12.5 Public Servi ce “800” Band,

except cellular band 851–868.9375 12.5 UHF Hi

896.1125–956.000 12.5 UHF Hi

We recommend you record your scanner’s serial number here. The number is on the back panel.

Serial Number: ___________________________

FCC NOTICE

Your scanner might cause radio or TV interference even when it is operating properly. To determine whether your scanner is causing the interference, tu rn off you r sc anner. If the interfe rence 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 rec eiver

• Contact your local RadioShack store for hel p

Note:

Mobile use of this scanner is unlawful or requires a permit in

some areas. Check the laws in your area.

SCANNING LEGALLY

Your scanner covers frequencies used by many different groups including police and fire departments, ambulance services, government agencies, private companies, amateur radio services, military oper ations, pager services, and wireline (telephone and telegraph) service providers. It i s legal to listen to almost every tr ansm ission your scanner can receive. However, there are some transmissions you should never intentionally listen to. These include:

• Telephone conversations (cellular, cordless, or other private means of telephone signal transmission)

• Pager transmissions

• Any scrambled or encrypted transmis sions

According to the Electronic Communications Privacy Act (ECPA), you are subject to fines and possible imprisonment for intentionally listening to, using, or divulging the contents of such a transmission unless you have the consent of a party to the communication (unless such activity is otherwise illegal).

This scanner has been designed to prevent reception of illegal transmissions. This is done to comply with the legal requirement that scanners be manufactured so as to not be easily modifi able to pick up those transmissions. Do not open your scanner's case to make any m odifications that could allow it t o pick up transmissions that it is not legal t o li sten to. Doing so could subject you to legal penalties. We encourage responsible, legal scanner use.

CONTENTS

Prepara tion ....... ... .......... ................. ......... ................. .......... .............. 9

Power Sources ............................................................................ 9

Using Internal Batteries ........................................................ 9

Charging Nickel-Cadmium Batteries .................................. 11

Using Standard AC Power ................................................. 12

Using Vehicle Battery Power .............................................. 13

Connecting an Antenna ............................................................ 14

Connecting an Optional Antenna ....................................... 15

Connecting an Extension Speaker ............................................ 16

Connecting an Earphone/Headphones ..................................... 16

Listening Safely ................................................................. 17

Traffic Safety ...................................................................... 17

Attaching the Belt Clip ............................................................... 17

Understanding Your Scanner ........................................................ 18

A Look at the Keypad .............. ............ ...................... ............ .... 18

A Look at the Display ............ .. .......... .. .......... .......... .......... ........ 20

Understanding Banks ................................................................ 22

Memory Banks ................................................................... 22

Service Banks .................................................................... 22

Operation ........................................................................................ 24

Turn ing On the Scanner and Setting Squelch ....... .. .......... ........ 24

Storing Known Frequencies into Channels ............... .......... ...... 25

Finding and Storing Active Frequencies ....... .......... .......... ........ 26

Searching the Service Banks ............................................. 26

Searching fro m a Selected Frequency .... ..................... ...... 27

Storing Active Frequencies ........ .......... .......... .......... .......... 28

Search Skip Memory ................................................................. 28

Manually Select ing a Channel ........ .......... .......... .. .......... .......... . 29

Scanning Channels ....................................... ...................... ...... 30

Deleting a Frequency from a Channel ...................................... 30

Listening t o W eather Broadcasts .............. ..................... .......... . 31

Using the PRO-74 at the Races ..................................................... 32

Storing a Car Number and Frequency .................. .......... .......... 32

Adding Frequencies to a Car Number ............................... 33

Viewing Frequencies Associated with a Car Number ........ 34

Deleting a Freque ncy from a Car Number ......................... 34

Scanning by Car Number ........... ...................... ...................... ... 34

Finding What Car Numbers are in What Channels ................... 35

Special Features ............................................................................. 36

Turning Memory Banks On and Off ........................................... 36

Locking Out Channels ......... .......................................... .. ........ .. 36

Priority ....................................................................................... 36

Using the Keylock ...................................................................... 38

Using the Display Backlight ....................................................... 38

Changing Search Speeds .. .......... .......... ..................... .......... ..... 38

Turning the Key Tone Off/On .......................... .. .......... .......... ..... 39

Turning the Battery Save Function Off/On ................................. 39

Skipping Data Signals .................................... .......... .......... ....... 40

A General Guide to Scanning ........................................................ 41

Guide to Frequencies ........... ..................... .......... .......... .......... .. 41

National Weather Frequencies ............................... .......... .. 41

Canadian Weather Frequencies ....... .......... .......... .............. 41

VHF FM Marine Frequencies ........................................ ..... 41

Birdie Frequencies ....... .......... .. .......... .......... .......... .......... .. 42

Guide to the Action Bands ........... ............ ...................... ............ 43

Typical Band Usage ............. .. .......... .......... .......... ........... ... 43

Primary Usage ....... ................................ ...................... ....... 44

Band Allocation ......... ...................... ...................... ............ ........ 44

Frequency Conversion .............................................................. 48

Trou bleshooting ................... ............ ...................... ...................... ... 49

Resetting the Scanner ............................................................... 50

Care and Maintenance .................................................................... 51

Specifications ................................................................................. 52

PREPARATION

POWER SOURCES

You can power your scanner from any of three sources:

• Internal batteri es (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 batteries (such as RadioShack Cat. No. 23-552).

You can also use four rechargeable nickel-cadmium batteries (Cat. No. 23-125). Before you use nickel-cadmium batteries, you must charge them (see “Chargi ng Nickel-Cadmium Batt eries” on Page 10).

Follow these steps to install batteri es.

1. While pushing up the tab above the battery compartment cover on the back of the s canner, lift open the battery compartment cover to remove it.

2. If you are installing alkaline batteries, use a pointed object such as a pen to set ment to teries, set it to

ALKALINE

ALKALINE JACK NI-CD

. Or, if you are in stalling n ickel-cadmiu m bat-

NI-CD

inside the compart-

Warning: Never set

ALKALINE JACK NI-CD

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 destro y electronic circ uits.

• Do not mix old and new batteries, different types of batteries

(alkaline or rechargeable), or rechargeable batteries of different capacities.

4. Replace the cover.

BATT.Lo

flashes and the scanner beeps every 15 seconds, replace

(alkaline) or rech arge (rechargeable ni ckel-cadmium) the batteries.

Caution: Always dispose of old b atteries promptly and properly. Do not bury or burn them.

Charging Nickel-Cadmium Batteries

The scanner has a built-i n circu it that lets you rechar ge nickel -cadm ium batteries whil e they are in the scanner. To charge the batteries, set

KALINE JACK NI-CD

NI-CD

, install the nickel-cadmium batteries

in the scanner, and connect an external AC or DC adapter to the scan-

POWER

ner’s

jack (see “ U sing Standard AC Power” on Page 11 or “Us-

ing Vehicle Battery Power” on Page 12).

AL-

Warning:

Do not connect either adapter to the scanner if you have non-rechargeable batteries (such as alkaline batteries) installed in the scanner and

ALKALINE JACK NI-CD

is set to

NI-CD

, or you are unsure of the switch’s position. Non-rechargeable batteries will get hot and can even explode if you try to recharge them.

Before you use nickel-cadmium batteries for the first time, c harge them at least 24 hours to bri ng them to a full charge.

Discharged batteries take about 10 to 18 hours to fully recharge. It takes longer to fully charge them if you operate the scanner while you recharge them.

Notes:

• Nickel-cadmium bat terie s last longer and del iver more power if you occasionally let them fully discharge. To do this, simply use the scanner until it begins beeping every 15 seconds and

BATT.Lo

flashes.

• To prevent damaging nickel-cadmium batteries, never charge them in an area where the temperature is above 113°F or below 40°F.

Important:

At the end of a rechargeable battery’s usef ul 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 cur b-side collec tion, drop- off box es at reta iler s such as your local RadioShack store, recycling collection centers, and mailback programs .

Using Standard AC Power

You can power the scanner from a standard AC outlet using an optional AC adapter (such as Cat. No. 273-1665).

Warning:

Do not use a n AC adapter’s polarized plug with an extension cord, receptacle, or other outlet unless the blades can be fully inserted to prevent blade expo sure.

Cautions:

• The recommended AC adapter supplies 9 volts and delivers at least 300 milliamps. It has a barrel plug with a center negative tip that correct ly fits the scanner’s

POWER

jack. Using an adapter that does not meet these specifications could damage the scanner or the adapter.

• To protect your scanner and AC adapter, always plug the adapter into the scanner before you plug it into the AC outlet, and always unplug the adapter from the AC outlet before you unplug it from the scanner.

• If batteries are installed, make sure

ALKALINE JACK NI-CD

is set to the correct position (see “Using Internal Batteries” on Page 8).

1. Turn

VOLUME

counterclockwise until it clicks to make sure power

is turned off.

2. Plug the adapter’s 3.4 mm outside diameter/1.3 mm inside diameter barrel plug into your scanner’s

POWER

jack.

3. Plug the other end of the adapter into a standard AC outl et.

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:

• The DC adapter must be capable of delivering 9 volts and at least 300 milliamps, its center tip must be set to negative, and its barrel plug must correctly fit the scanner's mended adapte r meets these s pecifications . Using an adapter that does not meet these specifications 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 cigarettelighter socket. Always unplug the adapter from the vehicle's cigarette-lighter socket before you unplug it from the scanner.

POWER

jack. The recom-

• If batteries are installed, make sure

ALKALINE JACK NI-CD

set to the correct position (see “Using Internal Batteries” on Page 8).

1. Turn

VOLUME

counterclockwise until it clicks to make sure power

is turned off.

2. Set the DC adapter’s voltag e switch to 9V.

3. Connect the adapter’s 3.4 mm outer diameter/1.3 mm inner diameter tip to the adapter’s cord, matching TIP to –.

4. Plug the adapter’s barrel plug into your scanner’s

POWER

jack.

5. Plug the other end of the adapter into your vehicle’s cigarettelighter socket.

When you finish usi ng the DC adapter, disconnect it from the cigarettelighter socket, then disconnect it from your scanner.

Note: 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.

CONNECTING AN ANTENNA

The supplied stub antenna helps your scanner receive most strong transmissions at events and makes the scanner easier to carry and use. The supplied flexible antenna provides slightly better reception and helps your scanner receive strong l o cal signals. You can attach either of the supplied antennas or an optional antenna to the scanner (see “Connecting an Optional Antenna” on Page 14).

Follow these st eps to attach either of the supplied ante nnas to the connector on the top of your scanner.

1. Align th e slots aro und the antenna’s connecto r with the tabs on the scanner’s BNC connector.

2. Slide the antenna’s connector down over the scanner’s connector and rotate the antenna connector’s outer ring clockwise until it locks into place.

Connecting an Optional Antenna

The scanner’s antenna jack makes it easy to use the scanner with a variety of antennas. Instead of either of the supplied antennas, you can attach a different one, such as an external mobile antenna or outdoor base station antenna. 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 over 50 feet, use RG-8 low-loss dielectric coaxial cable. If your antenna’s cable does not have a BNC connector, use a BNC adapter, available at your local RadioShack store.

Follow the installation instructions supplied with the antenna, route the antenna cable to the scanner, then connect it to the antenna lowing the steps in “Connecting an Antenna” on Page 13.

jack fol-

Warning:

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 .

Cautions

• Do not run the cable over sharp edges or moving parts.

• Do not run the cable next to power cabl es or other antenna cable s.

• Do not run the cable through a vehicle’s engine compartment or

• Follow all cautions and war nings included with the antenna.

Use extreme caution when installing or removing an outdoor

other areas that produce extreme heat.

CONNECTING AN EXTENSION SPEAKER

In a noisy area, an extension speaker (such as Cat. No. 21-549), positioned in t he right place, m ight provide more comfort able listeni ng. Plug the speaker cable’s

/8-inch mini-plug into your scanner’s jack.

CONNECTING AN EARPHONE/ HEADPHONES

For private listening, you can plug an earphone or headphones with a

/8-inch mini-plug (such as Cat. No. 33-178 or 20-210) into the jack on top 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 highvolume listen ing can lead to permanent hearing loss.

• Set the volume to the lowest setting before you begin listening. After you begin list ening, adjust the vol um e to a comfortable level.

• Once you set the volume, do not increase it. Over time, your ears adapt to the volume level, so a volume level that does not cause discomfort mig ht still damage your hear ing.

Traffic Safety

Do not use an earphone/headphones with your scanner when operating a motor vehicle or riding a bicycle in or near traffic. Doing so can create a traffic hazard and could be illegal in some areas.

If you use an earphone/headphones wit h your scanner, be very careful. Do not lis ten to a continuous broadcas t. Even though som e earphones/ headphones let you hear some outside sounds when listening at normal volume levels, they still can present a traffic hazard.

ATTACHING THE BELT CLIP

You can attach the supplied belt clip to make your scanner easier to use when you are on the go. Use a Phillips screwdriver and the two supplied screws to attach the belt clip to the scanner. Then slide the belt clip over your belt or waistband.

UNDERSTANDING YOUR SCANNER

Once you understand a few si mple terms we use in this manual and familiarize yourself with your scanner’s features, you can put the scanner to work for you. You simply find the communications you want to receive, then set the scanner to scan them.

frequency

A MHz). To find active frequencies, you can use the

is the tu ning location of a station (exp ressed in kHz or

function.

You can also search the

memory banks

, which are preset groups of

frequencies categorized by type of service. When you find a frequency, you can store it into a programmable memory

location called a memory bank. You can then

channel

, which is grouped with your other channels in a

scan

the memory banks to see if there is activity on the frequencies stored ther e. E ach t ime the scanner finds an active frequency, it stays on that channel until the transmission ends.

Remember, you

frequencies and

scan

channels.

A LOOK AT THE KEYPAD

Your scanner’s keys might seem confusing at first, but this information should help you understand each key’s function.

PROG

RACE

HOLD

PRIORITY

H/S

MAN

DATA

L-OUT

S/S

DEL

KEYLOCK CLEAR

BAND

SCAN

1-10

31-40

61-70 71-80 81-90

21-30

11-20

41-50 51-60

91-100

RACE

— lets you store car numbers and frequencies in the scanner’s channels, add and delete frequencies from car numbers, display car numbers, and lis ten to the channel where a car number is stored.

MAN

— stops scanning and lets you directly enter a channel number or

frequency.

PROG

— stores frequencies into channels.

BAND

— lets you search service banks.

SCAN

— scans through stored channels.

HOLD

— holds a frequency search.

DATA

— turns on or off the data signal skip feature, and lets you sequentially recall channels where car numbers and frequencies are stored durin g manu al operation.

PRIORITY/H/S

— sets and turns on and off priority for a particular chan-

nel. Also turns Hypersearch on and off.

L-OUT/S/S

— lets you lock out a selected channel and skips a specified

frequency duri ng a service bank, direc t, or weather search. t and s — enters the search di rection (down or up).

DEL

— deletes the fr equencies and car numbers stored in the memory.

KEYLOCK/

— locks the keypad to prevent accidental program

changes. Also turns on the display light for 15 seconds. Number Keys — each key is marked with a single digit, and has a

range of numbers printed above it. The single digits are used to enter a channel or frequency. The range of numbers (31–40, for example) indicates the channel s that make up a memory bank.

CLEAR/

point.

WX/E

— erases an incorrect entry or an error, and ent ers a decimal

•

— selects a weather channel , and ente rs the fr equency when you

store a frequenc y int o a channel.

A LOOK AT THE DISPLAY

The display has indicators that show the scanner’s current operating status. A good look at the display will help you understand how your scanner operates.

BANK

RACE NO.

MRN

SCAN

— appears with numbers (1–10) to show which memory banks

BANK

2345678

PRI

DATA

MAN PGM

are turned on for scanning. Service bank indicators — appear when you select the scanner’s ser-

vice banks (see “Service Banks” on Page 21).

HOLD

L/O

910

BATT.

K/L

HYPER

MHz

BATT.Lo

K/L

RACE

— flashes when the batteries are low.

— appears when you lock the keypad.

— appears when you store car numbers and frequencies in the scanner’s channels, add and delete frequencies from car numbers, display car numbers, and move to the channel where a car number is stored.

— appears when you set the scanner to scan the prior ity chan nels

PRI

every 2 seconds.

— appears when you turn on the data skip function.

DATA

— appears during a search hold.

HOLD

— appears when you search the preset frequencies in the weat her

band.

— appears when you are using Hypersearch during service

HYPER

bank and direct search. However,

disappears when the scan-

HYPER

ner searches any freq uency bands other than the 5 kHz step bands.

— appears when a car number is displayed

No.

MRN —

bank (see “Servi ce Banks” on Page 21).

the scanner is tun ed to.

MHz

scanner is tuned to. the displayed frequency is an odd multiple of 12.5 kHz (for frequencies between 406–956 MHz, or 108–136.975 MHz).

SCAN

MAN

PGM

ner’s channels.

L/O

frequency.

t and s

appears with CH when you select the scanner’s marine service

— appears when you listen to a prior ity channel. — digits that precede this indicator show whic h of the 100 channels

— digits that precede this indicator show which frequency the

appears directly above the

— appears when you scan channels.

— appears when you manually select a channel. — appears while you store (program) frequencies into the scan-

— appears when you manually select a locked channel or a skip

— appears when the battery save function is active.

— indicate the search direction.

indicator when

MHz

-d-

Error

— appears during a servi ce bank, direct, or weather search.

— appears during a direct search.

— appears when you make an invalid ent ry.

UNDERSTANDING BANKS

Memory Ba n ks

To make it easier to identify and select the channels you want to listen to, the PRO-74’s channels are divided into 10 banks of 10 channels each. Use each memory bank to group fr equencies, such as the polic e department, fire department, ambulance services, or aircraft (see “Guide to the Action Bands” on Page 42). For example, the police department might use four frequencies, one for each side of town. You could program the police frequencies starting with Channel 1 (the first channel in bank 1) and program the fire department frequencies starting with Channel 11 (the first channel in bank 2).

Service Banks

You can search for auto racing, mari ne, VHF, aircraft, military, amateur radio, government, UHF, TV, and 800 MHz transmissions even if you do not know the specific frequencies that are used in your area. And, you can store any of the frequencies you find into channels.

This table shows each service bank’s name, what it is used for, and its frequencies.

Name Typical Usage Frequency Range

CAr

MRN

AIr MIL

Auto Racing 150.9950–151.9550

Marine Listed in “VHF FM

VHF Lo 29.0000–54.0000 Air 108.0000–136.9750 Military 137.0000–144.0000

(in MHz)

152.8700–153.7250

154.4900–154.6250

460.0000–470.0000

Marine Frequencies” on Page 40.

Name Typical Usage Frequency Range

(in MHz)

HAM

HI FEd HAM UHF

TV 800

Your scanner also has 7 preprogrammed weather fr equencies.

For example, if you wanted to sear ch for transm issions between a dr iver and that drive r’s pit cr ew at an auto ra ce, you coul d sea rch only the service bank where you are most likely to hear the transmissions (

Notes:

• The frequencies in the scanner’s service banks are preset. You cannot change them.

• “Band Allocation” on Page43 lists frequency ranges and the broadcasters you are likely to hear on those frequencies.

2-Meter Ham 144.0000–148.0000 VHF Hi 148.0000–174.0000 Federal Government 406.0000–420.0000 70-Centimeter Ham 420.0000–450.0000 UHF 450.0000–470.0000 TV 470.0000–512.0000 800 MHz 806.0000–823.9375

851.0000–868.9375

896.1125–956.0000

CAr

OPERATION

PRO-74

SQUELCH

VOLUME

OFF

PRO-74

SQUELC H

VOLUM E

OFF

TURNING ON THE SCANNER AND SETTING SQUELCH

Note:

Make sure an antenna is connected to the scanner before you

turn it on.

1. Tur n

2. Turn

SQUELCH

VOLUME

fully counterclockwise.

clockwise until it clicks and you hear a hissing

sound.

3. Turn

SQUELCH

clockwise, then leave it set to a point just after the

hissing sound stops.

Notes:

• If you have not stored frequencies into any channels, the scanner

does not scan.

• If the scanner picks up unwanted, partial, or very weak transmis-

sions, turn

SQUELCH

clockwise to decre ase the scanner's sensiti vity to these signals. If you want to listen to a weak or distant station, turn

SQUELCH

•If scanner does not scan properly.

SQUELCH

counterclockwise.

is adjusted so you always hear a hissing sound, the

STORING KNOWN FREQUENCIES INTO CHANNELS

Good references for active frequencies are the RadioShack “Beyond Police Call,” “Aeronautical Frequency Directory,” and “Maritime Frequency Directory.” We update these directories every year, so be sure to get a current copy.

Follow these steps to store a frequency into a channel.

MAN

1. Press frequency, then press

2. Use the number keys and ing the decimal point) you want to store.

, enter the channel number where you want to store a

PROG

. The channel number appears.

•

RACE

CLEAR/

MAN

to enter the frequency (includ-

PROG

BAND

SCAN

3. Press

DATA

L-OUT

S/S

DEL

KEYLOCK

MAN

DATA

L-OUT

S/S

DEL

KEYLOCK

1-10

31-40

61-70 71-80 81-90

CLEAR

PROG

1-10

31-40

61-70 71-80 81-90

CLEAR

HOLD

PRIORITY

H/S

to store the frequency into the channel.

RACE

HOLD

PRIORITY

H/S

11-20

41-50 51-60

91-100

BAND

11-20

41-50 51-60

91-100

21-30

SCAN

21-30

Notes:

• If you entered an inappropriate frequency in Step 2,

appears and the scanner beeps three times. Simply repeat Steps 2 and 3.

Error

• Your scanner automatically rounds the entered fre quency to the nearest valid frequency. For example, if you enter a frequency of 151.473, your scan ner accepts it as 151.475.

• Your scanner automatically delays scanning for 2 seconds after a transmission ends before it proceeds to the next channel.

4. To program the next channel in sequence, press Steps 2 and 3.

Note:

If you previously stored a car number in a channel (see “Storing a Car Number and Frequency” on Page31), the scanner clears the number when you s tore a new frequency into a channel.

PROG

and repeat

FINDING AND STORING ACTIVE FREQUENCIES

Searching the Service Banks

Your scanner contains groups of preset frequencies called service banks. Each service bank is associated with a specific activity (see “Service Banks” on Page 21). You can search for auto racing, marine, VHF, aircraft, military, amateur radio, government, UHF, TV, and 800 MHz transmissions even if you do not know the specific frequencies that are used in your area.

1. Press

2. To select a different service bank, repeatedly press s or t until the

3. Press

4. When the scanner stops on a transmission, quickly press either:

BAND

. A service bank’s name,

search range appear.

Note:

The frequency search range does not appear if the

service bank is selected.

MRN

desired bank name appears.

BAND

. The scanner starts searching the frequencies within

that service bank.

Note:

To change the search direction, press s or t.

• t or s to continue sear ching

HOLD

•

to stop searching so you can listen to the transmission.

appears.

HOLD

, and the frequency

CAR

To release hold and continue searching, press

HOLD

or hold

down t or s for more than 1 second.

Notes:

• To step through the frequencies while

is displayed, press

HOLD

t or s.

• If you tune to a search skip frequency,

appears (see

L/O

“Searc h Skip M e m o ry ” on P age 27).

• To store a frequency into a channel while the frequency is paused or held, see “St oring Active Frequen cies” on Page 27.

Searching from a Selected Frequency

If you do not have a reference to frequencies in your area, you can search for tra nsm issions starting with a frequency you sel ect.

1. Press

2. To start the search from a frequency, enter it using the number

3. Press t to search downward or s to search upward from the

MAN

•

keys and

CLEAR/

. Or, to start the search from a frequency stored

in a channel, enter the channel number, then press

selected frequency.

PROG

MAN

RACE

-d-, SEARCH

BAND

SCAN

, and t or s appear .

MAN

HOLD

PRIORITY

H/S

1-10

DATA

31-40

L-OUT

S/S

61-70 71-80 81-90

DEL

KEYLOC K CL EA R

11-20

41-50 51-60

91-100

21-30

MHz

4. When the scanner st ops on a transmission , qui ckly press either:

• t or s to continue searching

HOLD

•

to stop searching so you can listen to the transmission.

appears.

HOLD

To release hold and continue searching, press

HOLD

or hold

down t or s for more than 1 second.

Notes:

• To step through the frequencies while t or s.

• If you tune to a search skip frequency, “Search Skip Memory” on Page 27).

• To store a frequency into a channel while the frequency is paused or held, see “Storing Active Frequencies.”

is display e d, pr e ss

HOLD

appears (see

L/O

Storing Active Frequencies

To store an active frequency into a channel, press quency is paused or held. The lowest available channel number flashes.

• To enter the frequency into that channel, press

• To change the channel, enter the desired channel number, then press

The frequency currently stored in that channel (if any) appears for about 2 seconds, then the new frequency appears. Press new frequency.

Notes:

• If you previously stored a car number and frequency in a channel (see “Storing a Car Number and Frequency” on Page 31), the scanner clears the number and frequency when you store a new frequency into that channel.

• If there are no empty channels, the channel number changes to and

FULL

PROG

appears. To clear

from the displ ay, press

FULL

PROG

while the fre-

to store the

CLEAR

SEARCH SKIP MEMORY

You can skip up to 20 specified frequencies during a service bank, direct, or weather search. This lets you avoid unwanted frequencies or ones you have already stored in a channel. You can specify all 20 frequencies to be skipped d uri ng one type of search (direct search, for example), or you can divide the frequencies you skip among two or all three search types.

To skip a frequency, press S/S when the

RACE

MAN

PROG

BAND

SCAN

HOLD

DATA

1-10

11-20

21-30

H/S

S/S

31-40

41-50 51-60

PRIORITY

L-OUT

DEL

61-70 71-80 81-90

91-100

KEYLOCK

CLEAR

scanner stops on the frequency during a search. The scanner stores the frequency in memory and automatically resumes the search.

To clear a single frequency from search skip memory so the scanner can stop on it during a search, follow these steps.

1. Press

2. Press

3. Press

HOLD to hold the search.

) or ( to select the frequency.L/O appears.

S/S. L/O disappears from the display.

To clear all the search skip frequencies at once, during a search, press

HOLD,thenholddownS/S until the scanner beeps twice (about 3 sec-

onds).

Notes:

• If you skip all the frequencies in the weather band, the scanner will not start searching.In this case, the scanner sounds three beeps.

• If you program more than 20 frequencies to skip, each new frequency replaces one you already stored, starting from the first frequency you stored.

• You can m anually select a skipped frequency.

L/O appears on the

display when you select a skipped frequency.

MANUALLY SELECTING A CHANNEL

You can continuously monitor a single channel without scanning. This is useful if you hear an emergency broadcast on a channel and do not want to miss any details — even though there might be periods of silence — or if you want to monitor a specific channel.

Note: You cannot use this procedure to select a car number. See “Viewing Frequencies Associated with a Car Number” on Page 33 to select a car number.

To manually select a channel, press then press desired channel, press

again. Or, if your scanner is scanning and stops at the

MAN

once .

MAN

, enter the channel number,

MAN

Pressing channels. To resume scanning, press

additional times cau ses you r scan ner to ste p through t he

MAN

SCAN

SCANNING CHANNELS

To begin scanning channels, press all non-locked channels in all banks that are turned on, from the lowest to the highest channel number. (See “Turning Memory Banks On and Off” and “Locking Out Channels” on Page 35).

When the scanner finds a transmission, it stops on it. Two seconds after the transmis sion ends, the scanner resumes scanning.

Note: If scanner does not scan properly.

SQUELCH

is adjusted so you always hear a hissing sound, the

. The scanner scans through

SCAN

DELETING A FREQUENCY FROM A CHANNEL

1. Press

2. Enter the channel number that contains the frequency you want to delete, then press

3. Press

PROG

. The frequency is deleted.

DEL

LISTENING TO WEATHER BROADCASTS

The FCC (Federal Communications Commission) has allocated frequencies for use by the National Oceanic and Atmospher ic Administration (NOAA). Regulatory agencies in other countries have also allocated f requencies for use by their weather reporting authorities.

Your local weather reporting authority broadcasts your local forecast and regional weather information on one or more of these frequencies. If your scanner is within a weather reporting authority’s broadcast range, you can scan these frequencies.

Your scanner has 7 weather service frequencies preprogrammed. See “National Weather Frequencies” on Page 40 for a list of these frequencies.

To hear your local forecast and regional weather information, simply

press scanner should stop within a few seconds on your local weather broadcast.

To manually tune to a specific preprogrammed weather frequency, press backward through the frequencies.

. Your scanner scans through the weather frequencies. Your

, then

HOLD

. Repeatedly press s or t to move forward or

USING THE PRO-74 AT THE RACES

The PRO-74 is specially designed to help you listen t o communications at auto races. Drivers and their pit crews and corner watchers, pace car drivers, security officers, emergency personnel, track officials, and representatives of governing organizations such as NASCAR, SCCA, and NHRA all use radios to communicate with each other during a race. You might also hear transmissions from the news media and reporters, local police departments, and paramedics and doctors at the local hospital. You can even listen to broadcasts by parking lot employees at the track, so you can find the best possible parking place when you arrive.

The scanner’s qui ck-track memor y lets you store a car number and frequency in each of the scanner’s channels, associate one or more frequencies stored in channels with a car number, and recall any frequencies associated with that car number by entering the number. You can store one car number by i tself, one car n um ber and frequency, or one frequency by itself in each channel (for up to 100 car numbers and frequencies).

For example, if you want to listen to communications between the driver of car number 24 and that driver’s pit crew, find all the frequencies used by the driver’s team by using the steps in “Searching the Service Banks” on Page 25, using the supplied frequency guide, “Searching from a Selected Frequency” on Page 26, or using frequencies you already know, then store a car number and the frequencies associated with that car number in the scanner’s channels. Then, you can display the car number as you scan those frequencies by using the information in “Scanning by Car Number” on Page 33.

STORING A CAR NUMBER AND FREQUENCY

You can store a car number and frequency in each of the scanner’s channels, and you can recall any frequencies associated with the car number by entering the number. You can store one car number in each channel (for up to 100 car numbers).

Note:

After you store a car number and a frequency, you can store additional frequencies then associate those frequencies with the same car number . See “Adding Frequencies to a Car Number” on Page 32.

Follow these steps to store a car number and frequency.

1. Press

MAN

then

RACE.

RACE

and

Car No?---

appears.

2. Enter the car number. If the number is one or two digits, enter the number, then press number only. The car number and

RACE

. If the number is three digits, enter the

---.---

appear.

Notes:

• If you add one or more leading zeros to a single-digit car num-

ber, your scanner recognizes them as different car numbers. For example, you can enter another car number, and

• To clear the display, press

for one car number, 05 for

for another car number.

005

•

CLEAR/

before you press

RACE

3. Enter the frequency (including the decimal point) you want to associate with the car number by using the number keys and

CLEAR/

4. Press

•

to store the frequency. The car number and frequency are

stored in the first available channel.

Adding Frequencies to a Car Number

Follow thes e steps to select a car number then associate additional frequencies with t hat car number .

1. Press

MAN

2. Enter the car number. If the number is one or two digits, enter the number, then press the number. The car number and the first frequency associated with that number appears.

3. Repeatedly press s or t until

4. Enter the frequency (including the decimal point) you want to associate wi th the displayed car number by using th e num ber keys

CLEAR/

and

5. Press

to store the frequency. The frequency is associated with

the car number you enter ed.

then

•

RACE.

RACE

and

Car No?---

appears.

. If the number is three digits, just enter

---.---

appears.

Viewing Frequencies Associated with a Car Number

After you store a car number and associate frequencies with that number, you can view all freq uencies associated wit h the number.

1. Press

2. Enter the car number. If the number is one or two digits, enter the

3. Repeatedly press s or t to view each of the frequencie s associated

MAN

number, then press the number. One of the frequencies associated with the car number appears.

with the car number you entered. When you have viewed all the frequencies, the display shows

then

RACE.

RACE

and

RACE

. If the number is three digits, just enter

Car No?---

---.---

appears.

Deleting a Frequency from a Car Number

1. Recall the car number.

2. Repeatedly press s or t until the frequency you want to delete appears.

3. Hold down frequency disappears.

DEL

for about 1 second. The scanner beeps and the

SCANNING BY CAR NUMBER

Once you store car numbers into channels, you can set the scanner so it displays the car numbers you assigned to the channels as it scans them.

To scan by car number, repeatedly press appear, then press numbers you stored appear in the order you stored them into their channels, from th e lowest to the highest channel.

Notes:

• If no car number is assigned to a channel, the car number.

SQUELCH

•If scanner does not scan properly.

SCAN

. As the scanner scans channels, the car

is adjusted so you always hear a hissing sound, the

RACE

until

appears instead of

---

BANK

and

RACE

FINDING WHAT CAR NUMBERS ARE IN WHAT CHANNELS

If you are listening to a channel an d want to know what car number you

RACE

are hearing, simply press ciated with this frequency, the car number and frequency appear.

RACE

Press

twice to return to normal channel listening.

twice. If a car number has been asso-

To see what car numbers are stored, press peatedly press . The car numbers (from lowest channel number to highest) show.

DATA

MAN

then

RACE

, then re-

SPECIAL FEATURES

TURNING MEMORY BANKS ON AND OFF

You can turn each memory bank on and off. When you turn off a bank, the scanner does not scan any of the 10 channels in that bank.

While scanning, press the number key that corresponds to the bank you want to turn on or off. When the channels within the displayed banks that are not locked out (see “Locking Out Channel s”).

Notes:

• You can manually select any channel within a bank, even if that bank is turned off.

• You cannot turn off all banks. One bank must always be active.

LOCKING OUT CHANNELS

You can increase the scanning speed by locking out channels that have a continuous transmission, such as a weather channel. To lock out a channel, manually select the channel, then press appears. You can still manually select locked out channels.

appears, the scanner scans all

BANK

L-OUT

L/O

To remove the lockout from a channel, manually select the channel

L-OUT

and press channels or frequencies in the banks that are turned on, press stop scanning, th en hold down

Note:

If you select a weather frequency by pressing out that frequency, the scanner stores the frequency in its search skip memory. Follow the steps under “Search Skip Memory” on Page 27 to remove the lockout f rom the weather frequency.

disappears from the display. Or, to unlock all

L/O

L-OUT

until the scanner beeps twice.

and then lock

MAN

PRIORITY

The priority feature lets you scan through channels and still not miss important or interesting calls on specific channels. You can program one channel in each bank as a priority channel (for up to a total of 10 priority channels). If the priority feature is turned on, as the scanner scans a bank, the scanner checks that bank’s priority channel every 2 seconds for activity.

The scanner automatically designates each bank's first channel as its priority channel. Follow these steps to select a different channel as the priority channel.

1. Press

PROG

2. Enter the channel number you want to select as the priority channel, t hen press

PRIORITY

. appears to the right of the channel

number.

RACE

HOLD

PRIORITY

H/S

MAN

DATA

L-OUT

S/S

DEL

KEYLOCK

BAND

SCAN

1-10

11-20 21-30

123

31-40 41-50

61-70 71-80

CLEAR

51-60

456

81-90

91-100

BANK

PGM

MHz

PROG

3. Repeat Steps 1–2 for the channel in each bank you want to program as a priority channel.

To confirm all priority channel numbers, press

PRIORITY

press To turn on the priority feature, press

to step through the pr iority channels.

PRIORITY

PROG

, then repeatedly

during scanning.

appears.

To turn off the priorit y feature, press

PRIORITY

again.

PRI

disappears.

Notes:

• The priority feature must be turned off to use the data skip feature (see “Skipping Data Signals” on Page 39).

• You can lock out priority

BANK

channels. If you lock out all priority channels, and appear when you turn

MAN

LOC OUt

L/O

on the priority f eature.

PRI

USING THE KEYLOCK

Once you set up and st ore channels in to your scanner, you can protect it from accidental changes by turning on the keylock feature. When locked, the only controls that operate are

VOLUME

, and

SQUELCH

SCAN, MAN, KEYLOCK/

To turn on the keylock, hol d down

RACE

HOLD

PRIORITY

H/S

KEYLOCK

PROG

MAN

1-10

DATA

31-40

L-OUT

S/S

61-70 71-80 81-90

DEL

KEYLOCK

CLEAR

until

BAND

SCAN

21-30

11-20

41-50 51-60

91-100

K/L

it off, hold down

KEYLOCK

disappears.

BANK

until

PGM

appears. To turn

K/L

MHz

USING THE DISPLAY BACKLIGHT

You can turn on the display backlight for easy viewing at night. Press

to turn it on for 15 seconds. To turn it off before 15 seconds

elapse, press the butt on again.

CHANGING SEARCH SPEEDS

The PRO-74 has two search speeds.

Normal Search Hypersearch

100 steps/second 300 steps/second

To switch between normal and Hypersearch speeds, during a service bank or direct search, press

H/S

HYPER

appears during Hyper search.

Notes:

RACE

MAN

PROG

BAND

SCAN

HOLD

DATA

1-10

11-20

21-30

H/S

S/S

31-40

41-50 51-60

PRIORITY

L-OUT

DEL

61-70 71-80 81- 90

91-100

KEYLOCK C LEA R

• You can use Hypersearch only in the 5 kHz step bands (29–54 MHz and 137–174 MHz.

• Since the marine service bank is not in one of the 5 kHz step bands, you cannot use Hypersearch in the marine service bank.

TURNING THE KEY TONE OFF/ON

Your scanner comes set so each time you press a key, you hear a tone. To turn off the key tone, follow these steps.

1. Turn off the scanner.

2. While holding down appears for about 3 seconds.

L-OUT/S /S,

turn on the scanner.

OFF bEEP

To turn the key tone back on, re peat these steps so

on bEEP

appears.

TURNING THE BATTERY SAVE FUNCTION OFF/ON

To save battery power when a channel is manually selected or when you are programming the scanner, the scanner has a battery save function which automatically sets the scanner to a standby mode if no button is pressed for 5 seconds when no signal is detected, and sets the scanner back to full power mode when it detects a button press or receives a signal. The battery save function is set to but you can change it. appears when the function is active.

Note: If priority is turned on, the battery save function does not work even if a channel is manually selected.

To turn the battery save function off or back on, turn off the scanner, then hold down

on SAVE

briefly appears.

PRIORITY/ H/S

and turn on the scanner.

at the factory,

OFF SAVE

SKIPPING DATA SIGNALS

DATA

You can set the scanner so it skips nonmodul ated or data signals (such as modem transmissi ons) during a search or scan.

Note:

Since data signals are not generally found in the air band, this

feature does not work in the air band.

To turn on the data skip feature, press . appears. To turn off the feature, pr ess again. disappears.

DATA

DA TA

A GENERAL GUIDE TO SCANNING

Reception of the frequencies covered by your scanner is mainly “lineof-sight.” That means you usually cannot hear stations that are beyond the horizon.

GUIDE TO FREQUENCIES

National Weather Frequencies

162.400 162.475 162.525

162.425 162.500 162.550

162.450

Canadian Weather Frequencies

161.650 161.775 163.275

Note:

The Canadian frequencies are not preprogrammed in this scan-

ner, but you can manually search or store them.

VHF FM Marine Frequencies

Chan-

nel

No.

6 156.3000 156.3000 64 156.2550 156.2550 7 156.3500 156.3500 65 156.2750 156.2750 8 156.4000 156.4000 66 156.3250 156.3250 9 156.4500 156.4500 67 156.3750 156.3750

10 156.5000 156.5000 68 156.4250 156.4250

11 156.5500 156.5500 69 156.4750 156.4750 12 156.6000 156.6000 70 156.5250 156.5250 13 156.6500 156.6500 71 156.5750 156.5750 14 156.7000 156.7000 72 156.6250 156.6250 15 156.7500 156.7500 73 156.6750 156.6750 16 156.8000 156.8000 74 156.7250 156.7250 17 156.8500 156.8500 77 156.8750 156.8750

Frequency Chan-

Ship Shore Ship Shore

nel No.

Frequency

Chan-

nel

No.

Chan-

nel

No.

19 156.9500 156.9500 79 156.9750 156.9750 20 157.0000 161.6000 80 157.0250 157.0250 21 157.0500 157.0500 81 157.0750 157.0750 22 157.1000 157.1000 82 157.1250 157.1250 23 157.1500 157.1500 83 157.1750 157.1750 24 157.2000 161.8000 84 157.2250 161.8250 25 157.2500 161.8500 85 157.2750 161.8750 26 157.3000 161.9000 86 157.3250 161.9250 27 157.3500 161.9500 87 157.3750 161.9750 28 157.4000 162.0000 88 157.4250 157.4250

Frequency Chan-

nel

Ship Shore Ship Shore

No.

Frequency Chan-

nel

Ship Shore Ship Shore

No.

Frequency

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

cut out the bi rdi e. The birdie fr equencies (in MHz ) found in this scanner are:

clockwise to

31.2000 41.6000 52.6000 116.0375

171.2500 410.0000 430.0000 480.4750

489.1875 489.2500 489.3500 489.4500

489.5000 813.4000 814.0000 932.6000

932.8250 938.3750 940.9000

To find the birdies in your particul ar scanner, begin by di sconnect ing the antenna and moving it away from the scanner. Make sure t hat no other nearby radios or TVs are turned on near the scanner. Use the search function to search every frequency range from its lowest to the highest frequency. Occasionally, the searching will stop as if it had found a signal, often wit hout any sound. That is a bir die. Make a list of all th e birdies in your scanner fo r future reference.

GUIDE TO THE ACTION BANDS

Typical Band Usage

VHF Band

Low Rang e 29.00–50.00 MH z 6-Meter Amateur 50.00–54.00 MH z U.S. Government 137.00–144.00 MHz 2-Meter Amateur 144.00–148.00 MHz High Range 148.00–174.00 MHz

UHF Band

U.S. Government 406.00–420.00 MHz 70-cm Amateur 420.00–450.00 MHz Low Rang e 450.00–470.00 MHz FM-TV Audio Broadcast, Wide Band 470. 00–512.00 MHz Public Service 806.00–823.93 MHz Conventional Systems 851.00–856.00 MHz Conventional/Trunked Systems 856.00–861.00 MHz Trunked Systems 861.00–866.00 MHz Public Safety 866.00–868.93 MHz High Range 896.11–902.00 MHz 33-Centimete r Amateur 902. 00–928.00 MHz Private Trunked 935.00–940.00 MHz General Trunked 940.00–941.00 MHz Fixed Services 941.00–944.00 MHz Studio-to-Transmit ter Broadcast Links 944.00–952.00 MHz Private Fixed Services, Paging 952.00–956.00 MHz

Primary Usage

As a general rule, most of the radio activity is concentrated on the following frequencies:

VHF Band

Activities Frequencies

Government, Police, and Fire 153.785–155.98 0 MHz Emergency Services 158.730–159.460 MHz Railroad 160.000–161.900 MHz

UHF Band

Activities Frequencies

Land-M obile “P aired” Frequencies 450.00 0–470.000 MHz Base Stations 451.025–454.950 MHz Mobile Units 456.025–459.950 MHz Repeater Units 460.025–464.975 MHz Control Stations 465.02 5–469.975 MHz

Note:

Remote control st ations and mobile units operate at 5 MHz high-

er than their associated base stations and relay repeater units.

BAND ALLOCATION

To help decide which frequency ranges to scan, use the following listing of the typical services that use the frequencies your scanner receives. These frequencies are subject to change, and might vary from area to area. For a more complete listing, refer to the book “Beyond Police Call,” available at your local RadioShack store.

Abbreviations Services

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 Government, Forestry Conservation)

PSB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Public Safety

PTR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Private Trunked

ROAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Road & Highway Maintenance

RTV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Radio/TV Remote Broadcast Pickup

TAXI. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Taxi Services

TELB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Mobile Te lephone

. . . . . . . . . . . . . . .(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

VERY HIGH FREQUENCY (VHF) VHF Low Band—(29.7–50 MHz—in 5 kHz steps)

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 Cleanup

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

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 (137–144 MHz)

137.000–144.000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GOVT, MIL

2-Meter Amateur Band (144–148 MHz)

144.000–148.000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HAM

VHF High Band (148–174 MHz)

148.050–150.345 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .CAP, MAR, MIL

150.775–150.790 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MED

150.815–150.980 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TOW, Oil Spill Cleanup

150.995–151.475 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ROAD, POL

151.490–151.955 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IND, BUS

151.985 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TELM

152.0075 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MED

152.030–152.240 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TELB

152.270–152.480 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .IND, TAXI, 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 Cleanup

154.600–154.625 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .BUS

154.655–156.240 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MED, ROAD, POL, PUB

156.255–157.425 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OIL, 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

159.480 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OIL

159.495–161.565 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TRAN

161.580–162.000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OIL, 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

169.445–169.505 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wireless Mikes, GOVT

169.55–169.9875 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GOVT, MIL, USXX

170.000–170.150 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BIFC, GOVT, RTV, FIRE

170.175–170.225 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GOVT

170.245–170.305 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wireless Mikes

170.350–170.400 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GOVT, MIL

170.425–170.450 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BIFC

170.475 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PUB

170.4875–173.175 . . . . . . . . . . . . . . . . . . . . . . . . .GOVT, PUB, Wireless Mikes

173.225–173.5375 . . . . . . . . . . . . . . . . . . . . . . . . . . . . MOV, NEWS, UTIL, MIL

173.5625–173.5875 . . . . . . . . . . . . . . . . . . . . . . . . . .MIL Medical/Crash Crews

173.60–173.9875 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GOVT

ULTRA HIGH FREQUENCY (UHF) U. S. Government Band (406–420 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

453.0125–454.000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PUB, 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

462.550–462.925 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GMR, BUS

462.9375–463.1875 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MED

463.200–467.925 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .BUS

FM-TV Audio Broadcast, UHF Wide Band (470–512 MHz) (Channels 14 through 69 in 6 MHz steps)

475.750 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Channel 14

481.750 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Channel 15

487.750 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Channel 16

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..

511.750 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Channel 20

Note:

Some cities use the 470–512 MHz band for land/mobile servi ce.

Conventional Systems Band – Locally Assigned

851.0125–855.9875 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .CSB

Conventional/Trunked Systems Band – Locally Assigned

856.0125–860.9875 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CTSB

Trunked Systems Band – Locally Assigned

861.0125–865.9875 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .TSB

Public Safety Band – Locally Assigned

866.0125–868.9875 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PSB

33-Centimeter Amateur Band (902–928 M Hz)

902.0000–928.0000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HAM

Private Trunke d

935.0125–939.9875 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .PTR

General Trun ke d

940.0125–940.9875 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GTR

FREQUENCY CONVERSION

The tuning location of a station can be expressed in frequency (kHz or MHz) or in wavelength (meters). The following information can help you make the necessar y conversions.

1 MHz (million) = 1,000 kHz (thousand)

To convert MHz to kHz, multiply the number of megaher tz by 1, 000:

9.62 (MHz) x 1000 = 9620 kHz

To convert from kHz to MHz, divide the number of kilohertz by 1,000:

2780 (kHz) ÷ 1000 = 2.780 MHz

To convert MHz to meters, divi de 300 by the number of megahertz :

300 ÷ 7.1 MHz = 42.25 meters

TROUBLESHOOTING

If you have problems, here are some suggestions that might help. If none do, take you r scanner to your loca l RadioShack store for assistance.

PROBLEM POSSIBLE CAUSE REMEDY

Keys do not work or displa y changes at random.

Scanner is on bu t will not scan.

Scanne r is totally inoperative.

The scan ner’s display dims or the scanner sounds a tone every 15 seconds.

–

Undetermined error. Reset the scanner (see

“Resetting the Scanner” on Page49).

SQUELCH is not correct ly adjusted.

Only one channel or no chan ne ls ar e stored.

No power. Check the batteries or

Batter ies are not correct ly installed.

Batter ies are low. Recharge the recharge-

Adjust SQUELCH clockwise.

Store frequencies into more than one channel.

make sure the scanner is plugged into a working AC or DC outl et .

Be sure the adapter’s barrel plug is fully plugged into the POWER jack.

Recharge the rechargeable batteries or replace the non-r e c ha r ge ab le batteries.

Make sure the batteries are in stalled with the proper polarity (+ to + and

to –).

–

able batteries or replace the non-r e c ha r ge ab le batteries.

Keypad does not work.

The keylock function is activated.

To turn off the keylock, press KEYLOCK until

disappears.

K/L

PROBLEM POSSIBLE CAUSE REMEDY

BATT.Lo

appears.

PROBLEM POSSIBLE CAUSE REMEDY

Poor or no reception.

appears. Frequency entered

Error

Whil e scan ning, t he scanne r loc ks on frequencies that have an unclear transmission.

The batteries are weak.

Batteries are weak or dead.

incorrectly.

Stored frequencies are the same as “birdie” frequencies.

Recharge rechargeable batteries, or replace nonrechargeable batteries.

Check the batteries, or make su re the scanner is plug ged in to a work ing AC or DC outlet .

Re-enter th e frequency correctly, including the decima l po int.

Avo id storing frequencies listed under “Birdie Frequencies” on Page 41, or only listen to them manually.

RESETTING THE SCANNER

If the scanner’s display locks up or does not work properly after you connect power, you might need to reset the scanner.

Caution:

the scanner (such as frequencies and car numbers). Before you reset the scanner, t ry turning it off and on to see if it begins working properly. Reset the scanner only when you are sure it is not working prope rly.

This procedur e clears all the information you have stored into

1. Tur n off the scanner.

2. While you hold down the

and 9 keys, turn on the scanner.

If you still have problems after resetting the scanner, take it to your local RadioShack store.

CARE AND MAINTENANCE

Your RadioShack PRO-74 100-Channel VHF/UHF/Air/800 MHz Race Scanner is an example of superior design and craftsmanship. The following suggestions will help you care for your scanner so you can enjoy it for years.

Keep the scanner dry. If it gets wet, wipe it dry immediately. Liquids can contain minerals that can corrode the electronic circuits.

Use only batteries of the require d size and recommended type. Always remove old and weak batteries. They can leak chemicals that destroy elect ronic circuits.

Handle the scanner gently and carefully. Dropping it can damage circuit boards and cases and can cause the scanner to work improperly.

Use and store the scanner only in normal temperature environments. Temperature extremes can shorten the life of elec troni c dev ices, damage batter ies, and dis tort or melt plastic parts.

Keep the scanner away from dust and dirt, which can cause premature wear of parts.

Wipe the scanner with a d amp cloth occasionally to keep it looking new. Do not use harsh chemical s, cleaning solvents, or stro ng detergents to clean the scanner.

Modifying or tampering with your scanner’s internal components can cause a malfunction, invalidate the scanner’s 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.

SPECIFICATIONS

Frequency Coverage ........... .. .......... ........ 29–54 MHz (in 5 kHz steps)

108–136.975 MHz (in 12.5 kHz steps)

137–174 MHz (in 5 kHz steps)

406–512 MHz (in 12.5 kHz steps)

806.0000–823.9375 MHz (in 12.5 kHz steps)

851.0000–868.9375 MHz (in 12.5 kHz steps)

896.1125–956.0000 MHz (in 12.5 kHz steps)

Channels ........................................................................................ 100

Sensitivity: (FM: 20 dB S/N at 3 kHz deviation)

(AM: 20 dB S/N at 60% modulation)

29–54 MHz ......................................................................... 0.5 µV

108–136.975 MHz ............. .. .................. ..................... ........ 1.5 µV

137–174 MHz ......................... .......... .......... ..................... ... 0.4 µV

406–512 MHz ......................... .......... .......... ..................... ... 0.3 µV

806–956 MHz ......................... .......... .......... ..................... ... 0.8 µV

Scan Speed ........ .......... .......... ..................... .......... .. 50 Channels/Sec.

Search Speed ........ .. ............................. .......... .......... ... 100 Steps/Sec.

Priority Sampling .................................................................. 2 Seconds

Delay Time ........................................................................... 2 Seconds

IF Frequencies ......... .. ................ 380.7 MHz, 10.85 MHz, and 450 kHz

Audio Power ........................................................... 330 mW Maximum

Built-in Speaker .......... .....1

Maximum Current Drain ........................................................... 160 mA

Power Requirement ................... 4 AA Alkaline Batteries (6.0 VDC), or

Dimensions (HWD) ........................................ 6

Weight (w/o batteries and antenna) ............................................ 8.1 oz

/16 Inches (36 mm) 8 Ohm, Dynamic Type

4 AA Rechargeable Ni-Cd Batter ies (4.8 VDC), or

AC Adapter (Cat. No. 273-1665 ), or

DC Adapter (Cat. No. 270-1560)

× 2

/8 × 111/16 Inches

(163.9 × 66 × 43.3 mm)

(228.9 g)

Specifications are typical ; individual units might vary. Specifications are subject to change and imp rovement without noti ce.

Limited One-Year Warranty

y g

This product is warran ted by RadioShack against manufactur ing defects in m aterial and workman ship u nder n ormal us e for one (1 ) RadioShack compan dealers. EXCEPT AS PROVIDED HEREIN, RadioShack MAKES NO EXPRESS WARRANTIES AND ANY IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY AND FITNESS FOR A PA RTICULAR PURPOSE, ARE LIMITED IN DURATION TO THE DURATION OF THE WRITTEN LIMITED WARRANTIES CONTAINED HEREIN. EXCEPT AS PROVIDED HEREIN, RadioShack SHALL HAVE NO LIABI LITY OR RE SPONS IBILITY TO CUSTOMER OR AN Y OTHER PERSON OR ENTIT Y WITH RESP ECT TO ANY L IABILITY, LOSS OR DAMAGE CAUSED DIRECTLY OR INDIRECTLY BY USE OR PERFORMANCE OF THE PRODUCT OR ARISING OUT OF ANY BREACH OF THIS WARRANTY, INCL UDING, BUT NOT LIMITED TO, ANY DAMAGES RESULTING FROM INCONVENIENCE, LOSS OF TIME, DATA, PROPERTY, REVENUE, OR PROFIT OR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, EVEN IF RadioShack HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Some states do not allow the lim itat ions on how lon exclusion of in cidental or co nsequential dama sions ma In the event of a pr odu ct defec t dur in RadioShack sales receipt as proof of pur chase date to an dioShack will, at its option, unless otherwise provided b product repair w ithou t ch arge for parts and l abor; ( b) r epl ace the p rod uct with one of the same o r simi lar desi products, and p roducts on whi ch a refund i s made, become t he propert dioShack. New or r econdi tione d parts a nd pr oducts m a of warrant mainder of the ori of the product made after the expiration of the warrant This warrant of God, abuse, ac cident, misuse, improper or abnormal usa structions, improper installation or ma intenance, alteration, li dence of excess volta RadioShack Autho ri zed Serv ice F acili t (d) cosmetic dama product removal, installation, set-up service ad This warrant which var

not apply to you.

service. Repaired or replaced parts and products are warranted for the re-

from state to state.

RadioShack Customer Relations, Dept. W, 100 Throckmorton St., Suite 600,

-owned stores and authorized RadioShack franchisees and

the warranty period, take t he produ ct and th e

n; or (c) refund the purchase pric e. All replaced parts and

inal warranty period. You will be charged for repair or replacement

does not cove r: (a) da mage or failure caused by or attributable to a cts

e or current ; (b) any repairs other tha n those pro vided by a

e; (e) transportation, ship ping or insurance costs; or (f) costs of

ives you spe cific legal rights, and you may also have oth er rights

; (c) consumable s such as f uses or bat teries ;

Fort Worth, TX 76102

We Service What We Sell

ear from the date of purchase from

an implied warranty lasts or the

es, so the above limi tations or exclu-

RadioShack store. Ra-

law: (a) correct the defect b

be used in the perform anc e

period.

e, failure to follow in-

htning or other inci-

ustment or reinstallation.

of Ra-

3/97

RadioShack

A Division of Tandy Corporation

Fort Worth, Texas 76102

6A8 Printed in the Philippines

UBZZ01292ZZ

Radio Shack PRO-74 User Guide

Specifications and Main Features

Frequently Asked Questions

User Manual