Radio Shack Scanner 20 521 User Guide

Cat. No. 20-521

Owner’s Manual

PRO-91 150-Channel

Handheld Trunking Scanner

Please read before using this equipment.

Five Channel-Storage Banks — you can store up to

30 channels in each of 5 different banks to group chan-

nels so you can more easily identify calls.

Five Scan Lists — you can store up to 50 trunking IDs

in each trunk tracking bank.

Two-Second Scan Delay — delays scanning for about

2 seconds before moving to another channel, so you

can hear more replies that are made on the same chan-

nel.

Lock-Out Function — lets you set your scanner to skip

over specified channels or frequencies when scanning

or searching, and skip over IDs when tracking trunked

systems.

Priority Channels — lets you program one channel in

each bank (5 in all) and then have the scanner check

that channel every 2 seconds while it scans the bank,

so you don't miss transmissions on those channels.

Five Service Banks — frequencies are preset in sepa-

rate police (fire/emergency), aircraft, ham, marine, and

weather banks, to make it easy to locate specific types

of calls.

Hypersearch — lets you set the scanner to search at

up to 300 steps per second. The normal search speed

is 100 steps per second.

Hyperscan — the scanner automatically scans up to

50 channels per second in frequency bands with 5 kHz

steps, to help you quickly find interesting broadcasts.

Key Lock — lets you lock the scanner's keys to help

prevent accidental changes to the scanner's program-

ming.

Data Signal Skip — lets you set the scanner to skip

non-modulated or data signals (such as fax or modem

transmissions) during searches. This lets the scanner

avoid non-voice signals, making a search faster.

Manual Access — lets you directly access any channel.

Liquid-Crystal Display — makes it easy to view and

change programming information.

Display Backlight — makes the scanner easy to read

in low-light situations.

Flexible Antenna with BNC Connector — provides

excellent reception and is designed to help prevent an-

tenna breakage. Or, you can connect an external an-

tenna.

Monitor Memories — let you temporarily store up to 5

frequencies or IDs.

Memory Backup — keeps the frequencies stored in

memory for an extended time if the PRO-91 loses pow-

er.

Three Power Options — let you power the scanner

using internal batteries, external AC power using an

optional AC adapter/charger, or DC power using an op-

tional DC cigarette-lighter power cable.

Key Confirmation Tones — the scanner sounds a

tone when you perform an operation correctly, and an

error tone if you make an error.

Battery Save — saves battery power when the scan-

ner does not detect any transmissions for more than 5

seconds when a channel is manually selected.

Battery Low Alert — warns you when battery power

gets low.

Your scanner can receive these bands:

Frequency

Step

Transmission

Range (MHz)

(kHz)

29–29.7

29.7–50

10-Meter Ham Band

VHF Lo

50–54

6-Meter Ham Band

108–136.9750

137–144

12.5 Aircraft

Military Land Mobile

2-Meter Ham Band

VHF Hi

144–148

148–174

406–420

420–450

450–470

470–512

806–956

12.5 Federal Government

12.5 70-cm Ham Band

12.5 UHF Standard Band

12.5 UHF “T” Band

12.5 Public Service

“800” Band, except

cellular band

We recommend you record your scanner’s serial num-

ber 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 wheth-

er your scanner is causing the interference, turn off

your scanner. If the interference goes away, your scan-

ner 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 dif-

ferent electrical circuit from the receiver

• Contact your local RadioShack store for help

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 differ-

ent groups including police and fire departments, ambu-

lance services, government agencies, private

companies, amateur radio services, military operations,

pager services, and wireline (telephone and telegraph)

service providers. It is legal to listen to almost every

transmission 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 transmis-

sion)

• Pager transmissions

• Any scrambled or encrypted transmissions

According to the Electronic Communications Privacy

Act (ECPA), you are subject to fines and possible im-

prisonment for intentionally listening to, using, or divulg-

ing the contents of such a transmission unless you

have the consent of a party to the communication (un-

less such activity is otherwise illegal).

This scanner is designed to prevent reception of illegal

transmissions, in compliance with the law which re-

quires that scanners be manufactured in such a way as

to not be easily modifiable to pick up those transmis-

sions. Do not open your scanner's case to make any

modifications that could allow it to pick up transmis-

sions that it is not legal to listen to. Doing so could sub-

ject you to legal penalties.

We encourage responsible, legal scanner use.

CONTENTS

Preparation ............................................................ 10

Power Sources ................................................. 10

Using Internal Batteries ............................ 10

Charging Nickel-Cadmium Batteries ......... 12

Using AC Power ....................................... 13

Using Vehicle Battery Power .................... 14

Connecting the Antenna .................................. 16

Connecting an Optional Antenna .............. 16

Connecting an Earphone/Headphones ............ 17

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

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

Connecting an Extension Speaker ................... 18

Attaching the Belt Clip ...................................... 18

About Your Scanner .............................................. 19

A Look at the Keypad ....................................... 20

A Look at the Display ....................................... 21

Understanding Banks ....................................... 23

Service Banks ........................................... 23

Channel Storage Banks ............................ 23

Monitor Memories ..................................... 24

Operation ............................................................... 25

Turning On the Scanner/Setting Squelch ......... 25

Storing Known Frequencies into Channels ...... 26

Searching For and Temporarily Storing

Active Frequencies ........................................... 27

Limit Search .............................................. 27

Direct Search ............................................ 28

Service Bank Search ................................ 29

Search Skip Memory ................................ 30

Listening to the Monitor Memories ................... 31

Moving a Frequency From a Monitor Memory

to a Channel ..................................................... 31

Scanning the Stored Channels ........................ 32

Manually Selecting a Channel ......................... 32

Special Features .................................................... 34

Delay ................................................................ 34

Turning Channel-Storage Banks On and Off ... 34

Locking Out Channels ...................................... 35

Priority .............................................................. 35

Using the Keylock ............................................ 37

Using the Display Backlight .............................. 37

Changing Search Speeds ................................ 37

Turning the Key Tone Off/On ............................ 38

Turning the Battery Save Function Off/On ....... 38

Skipping Data Signals ...................................... 39

Trunk Tracking ....................................................... 40

Types of Trunking Systems .............................. 40

Setting the Scanner to the

Trunk Tracking Mode ........................................ 41

Setting Squelch for the Trunk Tracking Mode .. 42

Storing Trunked Frequencies ........................... 42

Scanning a Trunked Bank ................................ 44

Monitoring an Active ID ............................. 45

Temporarily Storing an ID into the

Monitor ID Memory ................................... 45

Locking Out IDs ........................................ 46

Unlocking a Single ID ................................ 46

Unlocking All IDs ....................................... 46

Using Trunk Tracking Scan Delay ............. 47

Monitoring IDs ........................................... 47

Channel Activity Bars ....................................... 48

Scan Lists ......................................................... 49

Manually Storing IDs into Scan Lists ........ 49

Moving IDs to Scan Lists .......................... 50

Deleting a Stored ID .................................. 50

Scanning the Scan Lists ................................... 51

Scanning Type I and Hybrid Trunked

Systems ............................................................ 51

Selecting a Preset Fleet Map .................... 55

Programming a Fleet Map ........................ 56

Programming a Hybrid System ................. 57

A General Guide to Scanning ............................... 58

Guide to Frequencies ....................................... 58

National Weather Frequencies .................. 58

Canadian Weather Frequencies ............... 58

Birdie Frequencies .................................... 58

Guide to the Action Bands ............................... 59

Typical Band Usage .................................. 59

Primary Usage .......................................... 59

Band Allocation ................................................ 60

Frequency Conversion 63

Troubleshooting 64

Resetting the Scanner ..................................... 67

Care and Maintenance .......................................... 68

Specifications ........................................................ 69

PREPARATION

POWER SOURCES

You can power your scanner from any of three sources:

• Internal batteries (not supplied)

• Standard AC power (using an optional AC adapter)

• Vehicle battery power (using an optional DC

adapter)

Using Internal Batteries

You can power your scanner using four AA batteries.

For the longest operation and best performance, we

recommend alkaline batteries (such as Cat. No. 23-

552).

You can also use four rechargeable nickel-cadmium

batteries (Cat. No. 23-125). Before you use nickel-cad-

mium batteries, you must charge them (see “Charging

Nickel-Cadmium Batteries” on Page 11).

Follow these steps to install batteries.

VOLUME/OFF

1. Turn

counterclockwise until it clicks

to make sure the power is turned off.

2. Slide up and hold the tab on the back of the scan-

ner, then pull up the battery compartment cover.

3. If you are installing alkaline batteries, use a

pointed object such as a pencil to set ALKALINE

JACK

NI-CD inside the compartment to

ALKALINE. Or, if you are installing nickel-cadmium

batteries, set it to NI-CD.

Warning: Never set ALKALINE

JACK

NI-CD

to NI-CD if you are installing non-rechargeable bat-

teries. Non-rechargeable batteries can get hot or

explode if you try to recharge them.

4. 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 chemicals that destroy electronic cir-

cuits.

•

Do not mix old and new batteries, different

types of batteries (standard, alkaline, or

rechargeable), or rechargeable batteries of dif-

ferent capacities.

5. Replace the cover.

If BATT.Loflashes and the scanner beeps every 15

seconds, replace (standard/alkaline) or recharge (re-

chargeable nickel-cadmium) the batteries.

Caution: Always dispose of old batteries promptly and

properly. Do not bury or burn them.

Charging Nickel-Cadmium Batteries

The scanner has a built-in circuit that lets you recharge

nickel-cadmium batteries while they are in the scanner.

To charge the batteries, set ALKALINE

JACK

NI-

CD to NI-CD, install the nickel-cadmium batteries in the

scanner, and connect an external AC or DC adapter to

the scanner’s POWER jack (see “Using AC Power” on

Page 12 or “Using Vehicle Battery Power” on Page 13).

Warning: Do not connect either adapter to the scanner

if non-rechargeable batteries (such as alkaline batter-

ies) are 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, charge them at least 24 hours to bring them to a

full charge.

Discharged batteries take about 10 to 18 hours to fully

recharge. If you use the scanner while the batteries are

charging, charging takes longer.

Notes:

• Nickel-cadmium batteries last longer and deliver

more power if you occasionally let them fully dis-

charge. To do this, simply use the scanner until it

beeps every 15 seconds and BATT.Loflashes.

• To prevent damage to nickel-cadmium batteries,

never charge them in an area where the tempera-

ture is above 113°F or below 40°F.

Important: At the end of a rechargeable battery’s use-

ful life, it must be recycled or disposed of properly.

Contact your local, county, or state hazardous waste

management authorities for information on recycling or

disposal programs in your area. Some options that

might be available are: municipal curb-side collection,

drop-off boxes at retailers such as your local Ra-

dioShack store, recycling collection centers, and mail-

back programs.

Using 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 an AC adapter’s polarized plug

with an extension cord, receptacle, or other outlet un-

less the blades can be fully inserted to prevent blade

exposure.

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 correctly 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 the battery

switch inside the battery compartment is set to the

correct position (see “Using Internal Batteries” on

Page 9).

1. Turn VOLUME/OFF counterclockwise until it clicks

to make sure the 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 outlet.

If rechargeable batteries are installed and ALKALINE

JACK

NI-CD is set to NI-CD, the adapter powers the

scanner and recharges the batteries at the same time.

Using Vehicle Battery Power

You can power the scanner from your vehicle’s battery

power using an optional DC adapter such as Cat. No.

270-1560.

Cautions:

• The recommended DC adapter supplies 9 volts

and delivers at least 300 milliamps. It has a barrel

plug with a center negative tip that correctly 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 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 scan-

ner.

• If batteries are installed, make sure the battery

switch inside the battery compartment is set to the

correct position (see “Using Internal Batteries” on

Page 9).

1. Turn VOLUME/OFF counterclockwise until it clicks

to make sure the power is turned off.

2. Set the adapter’s voltage switch to 9V.

3. Connect the 3.4 mm outer diameter/1.3 mm inner

diameter tip to the adapter 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 vehi-

cle’s cigarette-lighter socket.

If you have installed rechargeable batteries and

set ALKALINE

JACK

NI-CD to NI-CD, the

adapter powers the scanner and recharges the

batteries at the same time.

Note: If the scanner does not operate properly when

you use a DC adapter, unplug the adapter from the cig-

arette-lighter socket and clean the socket to remove

ashes and debris.

CONNECTING THE ANTENNA

Follow these steps to attach the supplied flexible anten-

na to the connector on the top of your scanner.

1. Align the slots around the antenna’s connector with

the tabs on the scanner’s BNC connector.

2. Slide the antenna’s connector down over the scan-

ner’s connector and rotate the antenna connector’s

outer ring clockwise until it locks into place.

Connecting an Optional Antenna

The scanner’s BNC connector makes it easy to connect

a variety of optional antennas (such as an external mo-

bile antenna or outdoor base station antenna). Your lo-

cal RadioShack store sells a variety of antennas.

Note:

Always use 50-ohm coaxial cable, such as RG-

58 or RG-8, to connect an outdoor antenna. If the dis-

tance from the scanner to the antenna is over 50 feet,

use RG-8 low-loss dielectric coaxial cable. If your an-

tenna’s cable does not have a BNC connector, your lo-

cal RadioShack store carries

adapters.

variety of BNC

CONNECTING AN EARPHONE/

HEADPHONES

For private listening, you can plug an earphone or

mono headphones (such as Cat. No. 33-178 or 20-

210) into the

jack on top of your scanner. This auto-

matically disconnects the internal speaker.

Listening Safely

To protect your hearing, follow these guidelines when

you use an earphone or headphones.

• Do not listen at extremely high volume levels.

Extended high-volume listening can lead to per-

manent 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 use an earphone or headphones with your

scanner when operating a motor vehicle in or near traf-

fic. Doing so can create a traffic hazard and could be il-

legal in some areas.

If you use an earphone or headphones with your scan-

ner, be very careful. Do not listen to a continuous

broadcast. Even though some earphones/headphones

let you hear some outside sounds when listening at

normal volume levels, they still can present a traffic

hazard.

CONNECTING AN EXTENSION

SPEAKER

In a noisy area, an extension speaker (such as Cat. No.

21-549), 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.

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 supplied screws to attach

the belt clip to the scanner. Then slide the clip over your

belt or waistband.

ABOUT YOUR SCANNER

Once you understand a few simple 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 determine the type of communications you want

to receive, then set the scanner to scan those commu-

nications.

frequency

is the tuning location of a station (ex-

pressed in kHz or MHz). To find active frequencies,

you use the

function.

Besides searching within a frequency range you deter-

service

mine, you can also search your scanner’s

banks

. Service banks are preset groups of frequencies

categorized by type of service. For example, many am-

HAM2

ateur radio frequencies are located in the

bank.

service

When you find a frequency, you can store it into a pro-

channel

grammable memory location called a

. Chan-

. (This

scanner has 5 channel-storage banks of 30 channels

scan

channel-storage banks

nels are grouped into

each). You can then

the channel-storage banks

to see if there is activity on the frequencies stored

there.

Or, when you find a frequency, you can store it into a

temporary memory location called a monitor memory

until you decide whether or not to move it to a channel.

Just keep in mind — you search frequencies and scan

channels.

You can also use your scanner to track trunked trans-

missions (see “Trunk Tracking” on Page 39).

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.

HOLD — holds the frequency search; holds on the cur-

rent ID in the trunk tracking mode.

SCAN — scans through the stored channels.

MAN (manual) — stops scanning and lets you directly

enter a channel number or frequency.

PROG (program) — stores frequencies into channels;

programs the trunking frequency, fleet map, and ID

memories.

TRUNK — switches between conventional and trunk

tracking.

LIMIT/SRC (search) — starts a limit search; searches a

specified frequency range to find frequencies; searches

for another active ID while trunk tracking.

DATA

— turns on or off the data signal skip feature;

moves through menu settings while trunk tracking.

PRIORITY/H/S (Hypersearch) — sets and turns on and off

the priority feature; turns on and off Hypersearch.

L-OUT/S/S (search skip) — lets you lock out selected

channels or skip specified frequencies during a search;

lets you lock out a selected ID while trunk tracking.

KEYLOCK/

— locks the keypad to prevent acciden-

tal program changes; turns on the display light for 15

seconds.

DELAY — programs a 2-second delay for the selected

channel, a limit search, or each service scan; programs

a 5-second delay while trunk tracking.

t — searches down through a selected frequency

range during a frequency search; selects options dur-

ing program operation; changes the ID location number

while trunk tracking.

s — searches up through a selected frequency range

during a frequency search; selects options during pro-

gram operation; changes the ID location number while

trunk tracking.

Number Keys — each key has a single-digit label and a

range of numbers. The single digits are used to enter a

channel, frequency, service bank, or ID number. The

range of numbers (31–60, for example) are used to en-

ter the channels that make up a memory bank.

MON/CLEAR/ — stores frequencies into monitor mem-

•

ories during a search; recalls frequencies from monitor

memories when programming

channel; stores

searched IDs into monitor memories or selects options

while trunk tracking; enters a decimal point or clears an

incorrect entry.

SVC (service)/E (enter) — starts a service bank search;

enters frequencies into channels.

A LOOK AT THE DISPLAY

The display has indicators that show the scanner’s cur-

rent operating status. A good look at the display will

help you understand how your scanner operates.

BANK — appears with numbers (1–5). The numbers

show which channel-storage banks are turned on for

scanning.

TRUNK — appears when the scanner is set for trunk

tracking.

(trunking channel activity bars) — each represents a

received trunking frequency or a data frequency while

trunk tracking (see “Channel Activity Bars” on Page 47).

-1-— appears when the weather service band is se-

lected.

-2-— appears when the amateur radio service band

is selected.

-3- — appears when the marine service band is se-

lected.

-4-— appears when the air service band is selected.

-5-— appears when the police service band is select-

ed.

— appears when a priority channel is selected.

BATT.Lo— blinks when the scanner’s battery is low.

DATA

— appears when the data skip function is active.

SCAN— appears when you scan channels.

LIST — appears with numbers (1–5) during trunk

tracking. Numbers with a bar under them show which

ID scan list banks are turned on for scanning.

SVC — appears during a service search.

SEARCH — appears during a limit search and ID

search, and blinks when you monitor IDs (see “Monitor-

ing IDs” on Page 46).

PRI— appears when the priority feature is turned on.

HOLD— appears when you manually select a channel

or when the scanner is holding during a search.

DLY— appears when you program a delay.

L/O— appears when you manually select a channel or

frequency you locked out.

K/L(keylock) — appears when you lock the keypad.

Error— appears when you make an entry error.

MON — appears during search modes or when you

select a monitor memory. The number to the right of

this indicator shows the current monitor memory num-

ber.

MAN— appears when you press MAN.

PGM — appears while you store a frequency into a

channel, while you enter a frequency range during a

limit search, or when you program trunking frequen-

cies, fleet maps, or ID memories while trunk tracking.

HYPER — appears while Hyperscan or Hypersearch

is active during a direct or limit search.

t and s — appears during a limit, direct, or service

search, indicating the search direction.

— appears when the battery save function is active

(during conventional scanning only).

UNDERSTANDING BANKS

Service Banks

The scanner is preprogrammed with all the frequencies

allocated to the weather, ham, marine, aircraft, and po-

lice (fire/emergency) services. This is handy for quickly

finding active frequencies instead of doing a limit

search (see “Service Bank Search” on Page 28).

Channel Storage Banks

To make it easier to identify and select the channels

you want to listen to, channels are divided into 5 banks

of 30 channels each. Use each channel-storage bank

to group frequencies, such as those for the police de-

partment, fire department, ambulance services, or air-

craft (see “Guide to the Action Bands” on Page 58).

For example, the police department might use four fre-

quencies, one for each side of town. You could pro-

gram the police frequencies starting with Channel 1

(the first channel in bank 1), and program the fire de-

partment frequencies starting with Channel 31 (the first

channel in bank 2).

Monitor Memories

The scanner also has 5 temporary memory locations

called monitor memories. You can use these monitor

memories to temporarily store frequencies while you

decide whether to store them into a channel. This is

handy for quickly storing an active frequency when you

search through an entire band (see “Searching For and

Temporarily Storing Active Frequencies” on Page 26).

While you are searching frequencies, the 5 numbers at

the top of the display indicate the 5 monitor memories.

MONappears and the number beside it that flashes in-

dicates the currently active monitor memory.

OPERATION

TURNING ON THE SCANNER

AND SETTING SQUELCH

Note:

Make sure the scanner’s antenna is connected

before you turn it on.

SQUELCH

1. Turn

fully counterclockwise.

VOLUME/OFF

2. Turn

clockwise until it clicks and you

hear a hissing sound.

MAN

3. Press

(manual) to stop the scanner from

SQUELCH

scanning, turn

clockwise, then leave it

set to a point just after the hissing sound stops.

STORING KNOWN FREQUENCIES

INTO CHANNELS

Good references for active frequencies are Ra-

dioShack's “Beyond Police Call,” “Aeronautical Fre-

quency Directory,” and “Maritime Frequency Directory.”

We update these directories every year, so be sure to

get a current copy.

Follow these steps to store frequencies into channels.

1. Press MAN, enter the channel number where you

want to store a frequency, then press PROG. The

channel number appears.

•

2. Use the number keys and to enter the frequency

(including the decimal point) you want to store.

3. Press E to store the frequency into the channel.

Notes:

•

If you entered an invalid frequency in Step 2,

Error appears and the scanner beeps three

times. Simply enter the frequency again.

•

Your scanner automatically rounds the entered

frequency to the nearest valid frequency. For

example, if you enter a frequency of 151.473,

your scanner accepts it as 151.475.

Press DELAY if you want the scanner to pause 2

seconds after a transmission ends before it pro-

ceeds to the next channel (see “Delay” on

Page 33). The scanner also stores this setting

in the channel.

4. If you want to program the next channel in

sequence, press PROG and repeat Steps 2 and 3.

SEARCHING FOR AND

TEMPORARILY STORING ACTIVE

FREQUENCIES

If you do not have a reference to frequencies in your

area, use a limit, direct, or service search to find a

transmission. Also see “Guide to the Action Bands” on

Page 58.

Notes: While doing a limit, direct, or service bank

search, you can press:

• DELAY if you want the scanner to pause 2 seconds

after a transmission ends before it proceeds to the

next frequency (see “Delay” on Page 33).

DATA

•

if you want the scanner to skip data signals

(such as fax or modem signals) and search only

for audio (voice) signals (see “Skipping Data Sig-

nals” on Page 38).

Limit Search

A limit search lets you search within a specific range

of frequencies. -L-appears during a limit search.

1. Press PROG, then LIMIT. Lo and 29.000 MHz

appear.

2. Enter the frequency that is the lower limit of the

range you want to search (including the decimal

point), then press E.

3. Press LIMIT. Hiand 956.000MHzappear.

4. Enter the frequency that is the upper limit of the

range you want to search (including the decimal

point), then press E again.

5. Press t to search from the upper to the lower limit,

or s to search from the lower to the upper limit.

6. When the scanner stops

transmission,

quickly press either:

•

HOLD to stop search-

ing so you can listen

to the transmission.

HOLDappears.

MON/CLEAR to store

the displayed fre-

quency into the cur-

rent monitor memory.

To release hold and continue searching, press

HOLD or hold down t or s for at least 1 second. Or,

if you did not press HOLD, simply press t or s to

continue searching.

Direct Search

Direct search lets you search up or down from the cur-

rently displayed frequency.

1. Press MAN.

2. Use the number keys to enter the frequency you

want to start the search from. Press to enter a

•

decimal point.

Notes:

•

If you want to start the search from a frequency

already stored in one of your scanner’s chan-

nels, press MAN or PROG, use the number keys

to enter the channel number, then press MAN or

PROG again.

•

If you enter an invalid frequency, the scanner

displays Error. Simply repeat this step.

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

from the selected frequency. -d-, SEARCH, and t

or s appear.

4. When the scanner stops on a transmission,

quickly press either:

•

HOLD to stop searching so you can listen to the

transmission. HOLDappears.

•

MON/CLEAR to store the displayed frequency

into the current monitor memory.

To release hold and continue searching, press

HOLD or hold down t or s for at least 1 second. Or,

if you did not press HOLD, simply press t or s to

continue searching.

Note: To step through the frequencies while HOLD

is displayed, press t or s.

Service Bank Search

You can search for weather, ham, marine, aircraft, or

police (fire/emergency) transmissions even if you do

not know the specific frequencies being used in your

area. The scanner is preprogrammed with all the fre-

quencies allocated to these services. To use this fea-

ture, press SVC. SVC appears and the scanner

searches through the weather service band. To select

a different service bank, press the desired service bank

key (WX1, HAM2, MRN3, AIR4, or POL5). The corre-

sponding service band number (-1-, -2-, -3-, -4-,

or -5-) appears, and the scanner starts searching the

band.

When the scanner stops on a transmission, quickly

press either:

• HOLD to stop searching so you can listen to the

transmission. HOLDappears.

• MON/CLEAR to store the displayed frequency into

the current monitor memory.

To release hold and continue searching, press

HOLD or hold down t or s for at least 1 second. Or,

if you did not press HOLD, simply press t or s to

continue searching.

Note: Because there are many different frequencies al-

located to fire and police departments, it takes several

minutes to search all these frequencies.

Search Skip Memory

You can skip up to 20 specified frequencies during a

limit or direct search and up to 20 specified frequencies

during a service bank search. This lets you avoid un-

wanted frequencies or ones you have already stored in

a channel.

To skip a frequency, press

S/S when the scanner

stops on the frequency dur-

ing a limit, direct, or service

search. The scanner stores

the frequency in memory

and

automatically

re-

sumes the search.

To clear a single frequency from skip memory so the

scanner once again stops on it during a limit, direct, or

service bank search:

1. Press HOLD to hold the search.

2. Press t or s to select the frequency. L/Oap-pears.

3. Press S/S. L/Odisappears.

To clear all the skip frequencies at once while search-

ing, press HOLD, then hold down S/S until the scanner

beeps twice (about 3 seconds).

Notes:

• If you marked all frequencies to be skipped within

the search range, the scanner beeps 3 times and

does not search.

• If you program more than 20 frequencies to skip,

each new frequency replaces one you already

stored, starting from the first frequency you stored.

• Press t or s to select a skipped frequency while

HOLD appears. L/O appears when you select a

skipped frequency.

LISTENING TO THE MONITOR

MEMORIES

You can listen to the fre-

quency you stored in any

one of the five monitor

memories by pressing

MAN, MON/CLEAR, then

the number of the moni-

tor memory you want to

–

listen to (1 5).

Note: To listen to the

monitor memories, the

priority channel feature

must be turned off (see

“Priority” on Page 34).

MOVING A FREQUENCY FROM A

MONITOR MEMORY TO A

CHANNEL

1. Press MAN. MAN

appears.

2. Enter the number of

the channel where

you want to store

the frequency in a

monitor

memory,

then press PROG.

PGMappears.

3. Press MON/CLEAR and enter the number of the

monitor memory that contains the frequency you

want to store.

4. Press E. The scanner stores the frequency into the

selected channel.

SCANNING THE STORED

CHANNELS

To begin scanning channels, press SCAN. The scanner

scans through all non-locked channels in the activated

banks. (See “Locking Out Channels” on Page 34 and

“Turning Channel-Storage Banks On and Off” on

Page 33). When the scanner finds a transmission, it

stops on it. When the transmission ends, the scanner

resumes scanning.

Notes:

• If you have not stored frequencies into any chan-

nels, the scanner does not scan.

• If the scanner picks up unwanted, partial, or very

weak transmissions, turn SQUELCH clockwise to

decrease the scanner's sensitivity to these signals.

If you want to listen to a weak or distant station,

turn SQUELCH counterclockwise.

• If SQUELCH is adjusted so you always hear a hiss-

ing sound, the scanner does not scan properly.

• To scan in the trunk tracking mode, see “Scanning

a Trunked Bank” on Page 43.

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.

Follow these steps to manually select a channel.

1. Press MAN.

2. Enter the channel number.

3. Press MAN again.

Or, if your scanner is scanning and stops at the desired

channel, press MAN one time. (Pressing MAN addition-

al times causes your scanner to step through the chan-

nels.)

To resume automatic scanning, press SCAN.

SPECIAL FEATURES

DELAY

Many agencies use a two-way radio system that might

have a period of 2 or more seconds between a query

and a reply. To keep from missing a reply on a specific

channel, you can program a 2-second delay into any

channel or frequency. The scanner continues to moni-

tor the channel frequency for 2 seconds after the trans-

mission stops before resuming scanning or searching.

To program a 2-second delay:

• If the scanner is

scanning and stops

on an active channel

where you want to

store a delay, quickly

DELAY

press

before it

continues scanning

again. DLYappears.

• If the desired channel is not selected, manually

DELAY

select the channel, then press

pears.

. DLY ap-

DELAY

• If the scanner is searching, press

while the

scanner is searching. DLYappears and the scan-

ner automatically adds a 2-second delay to every

frequency it stops on in that band.

DELAY

To turn off the 2-second delay, press

while the

scanner is monitoring a channel, scanning, or search-

ing. DLYdisappears.

TURNING CHANNEL-STORAGE

BANKS ON AND OFF

You can turn each channel-storage bank on and off.

When you turn off a bank, the scanner does not scan

any of the 30 channels in that bank.

While scanning, press the number key that corresponds

to the bank you want to turn on or off. Numbers appear

at the top of the display, showing the currently selected

banks.

The scanner scans all the channels within the dis-

played banks that are not locked out (see “Locking Out

Channels”).

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 L-OUT. L/Oappears.

Note: You can still manually select locked out chan-

nels.

To remove the lockout from a channel, manually select

the channel, then press S/S. L/Odisappears.

To unlock all channels in the banks that are turned on,

press MAN to stop scanning, then hold down L-OUT un-

til the scanner beeps twice.

PRIORITY

The priority feature lets you scan through channels and

still not miss important or interesting calls on specific

channels. You can program one stored channel in each

bank as a priority channel (for up to a total of 5 stored

channels). If the priority feature is turned on, as the

scanner scans the bank, it 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 in a bank as the priority chan-

nel.

1. Press PROG.

2. Enter the channel number you want to select as

the priority channel, then press PRIORITY.

appears to the right of the channel number.

3. Repeat Steps 1 and 2 for the channel in each bank

you want to program as a priority channel.

To review all priority channels, press PROG, then re-

peatedly press PRIORITY to see the numbers of the pri-

ority channels.

To turn on the priority feature, press PRIORITY during

scanning. PRIappears. Every 2 seconds the scanner

checks the priority channel in each bank that is turned

on.

To turn off the priority feature, press PRIORITY. PRI

disappears.

Notes:

• The priority feature must be turned off to listen to

the monitor memories or to use the data skip fea-

ture.

• You can lock out pri-

ority channels. If you

lock out all priority

channels,

LOCOUt

appears when you

turn on the priority

feature.

USING THE KEYLOCK

Once you program your scanner, you can protect it

from accidental program changes by turning on the

keylock feature. When locked, the only controls that

operate are SCAN, MAN, KEYLOCK, VOLUME/OFF, and

SQUELCH.

Note:

The keylock does not prevent the scanner from

scanning channels.

To turn on the keylock, hold down KEYLOCK until K/L

appears. To turn it off, hold down KEYLOCK until K/L

disappears.

USING THE DISPLAY BACKLIGHT

You can turn on the display light for easy viewing at

night. Press

to turn on the display light for 15 sec-

onds. To turn off the light before 15 seconds elapse,

press the button again.

CHANGING SEARCH SPEEDS

The PRO-91 has two search speeds.

Normal Search

Hypersearch

100 steps/second

300 steps/second

To switch between the normal and Hypersearch

speeds during limit search or direct search, press H/S.

HYPERappears during Hypersearch.

Note:

You can use Hypersearch only in the 5 kHz step

bands (29–54 MHz and 137–174 MHz).

TURNING THE KEY TONE OFF/ON

To turn off the key tone, follow these steps.

1. Turn off the scanner.

2. While holding down L-OUT/S/S, turn on the scan-

ner. OFFbEEPappears.

To turn the key tone back on, repeat these steps. on

bEEPappears.

TURNING THE BATTERY SAVE

FUNCTION OFF/ON

To save battery power when a channel is manually se-

lected or while you program the scanner, the scanner

automatically sets itself to a standby (battery save)

mode if no button is pressed for more than 5 seconds

and no signal is received.

save is set to on.

appears when battery

While the battery save mode is set to on, the scanner

repeatedly turns off the internal power for 1 second,

then turns it back on for about ¹/²second to check for a

transmission.

The scanner is preset with the battery save mode set to

on, but you can turn it off or back on.

Note:

The battery save mode does not work if the prior-

ity function is on, even if a channel is manually select-

ed.

To turn the battery save function off or back on, turn off

the scanner, then hold down PRIORITY and turn on the

scanner.

• OFFSAVEbriefly appears when battery save has

been turned off.

• on SAVE briefly appears when battery save has

been turned on.

SKIPPING DATA SIGNALS

You can set the scanner so it skips nonmodulated or

data signals (such as fax or modem transmissions)

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, be sure the priority

feature is turned off (see “Priority” on Page 34), then

DATA

press

appears. To turn off the feature,

DATA

again.

DATA

disappears.

DATA

TRUNK TRACKING

Your scanner is designed to track transmissions on Mo-

torola Type I, Type II, and hybrid analog trunking sys-

tems, which are extensively used in 800 MHz

communications. Remember these important points

when tracking transmissions:

• Your scanner monitors Type II systems by default.

However, you can change this if the system in your

area is different (see “Types of Trunking Systems”

below and “Scanning Type I and Hybrid Trunked

Systems” on Page 50 for more information).

• Your scanner cannot track transmissions on non-

Motorola trunking systems.

• Your scanner cannot track an 800 MHz trunked

system and scan conventional frequencies at the

same time.

• The frequencies for many of the 800 MHz public

safety systems are listed in the separate “National

Public Safety Trunked System Frequency Guide”

included with your PRO-91.

TYPES OF TRUNKING SYSTEMS

Your trunk tracking scanner can monitor two basic types

of systems — Type I and Type II. Instead of selecting a

specific frequency to transmit on, a trunked system

chooses one of several frequencies in a 2-way radio us-

er’s talk group when that user presses PTT (push to

talk). Thus, trunking systems allocate a few frequencies

among many different users, but the way Type I and

Type II systems do this is slightly different. One impor-

tant distinction between these systems is the amount of

data transmitted by each radio when its push-to-talk

(PTT) button is pressed. In a Type I system, the radio’s

ID and its current affiliation (the trunk system it belongs

to) are both transmitted. In a Type II system, only the ra-

dio’s ID is transmitted.

Why the difference? In Type I systems, each radio in

the trunk group individually transmits its own affiliation,

while the trunk system maintains a database that deter-

mines each radio's affiliation(s) in Type II systems.

Another difference between the systems is that Type I

systems are arranged in a fleet-subfleet hierarchy. For

example, it is possible for a city using a Type I system

to designate 4 fleets, each with 8 subfleets.

The fleets might be the police department, the fire de-

partment, utilities, and city administration. The police

might decide to further divide its fleet into subfleets

such as dispatch, tactical operations, detectives, north,

south, east and west side patrols, and supervisors. All

the available police radios would then be assigned to

one of the police subfleets, letting the police centralize

their communications and control the type of users on

a single system. Determining the exact fleet-subfleet

hierarchy for a particular area is referred to as fleet

map programming.

The disadvantage of a Type I system is that the brief

burst of data sent when a user transmits must contain

the radio’s ID and its fleet and subfleet. This is three

times the amount of data a Type II system radio sends.

Since the data capacity of Type I systems is limited and

the amount of data increases with each user, Type I

systems usually accommodate fewer users than Type

II systems. Nevertheless, Type I systems are still in

use.

There are also hybrid systems which are a combination

of both Type I and Type II. Your scanner defaults to

monitor Type II systems, but you can change to Type I

or a hybrid of Type I and Type II systems by selecting a

preprogrammed fleet map or creating a custom fleet

map for your area (see “Scanning Type I and Hybrid

Trunked Systems” on Page 50).

You do not need to determine the fleet-subfleet hierar-

chy for Type II systems unless you are tracking hybrid

systems that contain both Type I and Type II systems.

SETTING THE SCANNER TO THE

TRUNK TRACKING MODE

Press TRUNK to switch between conventional scanning

and trunk tracking.

SETTING SQUELCH FOR THE

TRUNK TRACKING MODE

Your scanner’s squelch setting is automatically adjust-

ed during trunk tracking, which means it is not neces-

sary to manually adjust squelch while tracking trunked

transmissions. However, the squelch setting can affect

how fast your scanner acquires the data channel, and,

in some instances, can prevent your scanner from ac-

quiring the data channel at all.

We recommend you set SQUELCH to this position before

selecting a trunked bank.

Note:

You can change this setting, if necessary, to pro-

vide better performance in your area.

STORING TRUNKED

FREQUENCIES

Before you set up your scanner to track a trunked sys-

tem, consider the following:

• Valid trunked system frequencies range from

851.0000–868.9875 in 12.5 kHz steps.

• You can use any of your scanner’s banks as either

a trunk tracking bank or conventional scanning

bank, but you cannot mix the two.

• The scanner only scans one trunked system at a

time. Although you can store frequencies for more

than one trunked system in one of your scanner’s

banks, the scanner only scans the frequencies

associated with the first data channel it finds.

Before scanning a trunked system’s transmissions, you

must store the trunked system’s frequencies in one of

the banks in your scanner by following these steps.

1. Press PROG then TRUNK. TRUNK appears and

one or more bank numbers flash.

2. Select the bank you want to store the trunked sys-

tem’s frequencies in by pressing a number key.

The scanner automatically selects the first channel

in the bank when you select the bank.

3. Use the number keys to enter one of the trunked

system’s frequencies, then press E. TRUNK,

BANKand the bank number, the channel number,

and the frequency appear.

Note: If you entered an invalid frequency, the

scanner beeps, the channel number flashes and

Errorappears. If this happens, press to clear

•

the frequency, then repeat this step.

4. Press either PROG or s to select the next channel

in the bank.

5. Repeat Steps 3 and 4 until all frequencies have

been entered in that bank.

6. Press

SRC

to begin

searching for the trunk’s

data channel (the channel

that controls the trunk).

SEARCH flashes as the

scanner searches for the

data channel.

While the scanner looks through the frequencies,

you see them on the display. When the scanner

finds the data channel, it begins trunk tracking.

SCANNING A TRUNKED BANK

You can scan one trunked bank at a time. Once you

have stored frequencies for a trunked system in one or

more of the 5 available banks and you are scanning

conventional (non-trunked) frequencies, follow these

steps to begin trunk scanning.

1. Press TRUNK. The numbers for all banks flash,

along with BANKand TRUNK.

2. Use the number keys to enter the number for the

trunked bank you want to scan, then press SRC.

The scanner searches for a data channel. When

the scanner finds it, it begins trunk tracking.

If you entered all of the trunk’s frequencies, you

should be able to follow conversations between

broadcasters even when they change frequen-

cies. IDs, which represent different service

groups, appear.

3. To return to conventional scanning, press TRUNK

again.

Hint: While scanning, you will not know exactly who

the IDs are assigned to until you listen awhile or until

you locate ID lists in frequency guides or on internet

sites such as www.trunkscanner.com. Within a few

minutes, you can usually figure out if what you are lis-

tening to is a police, fire, or emergency medical 2-way

radio user. Other IDs might take some time, but deter-

mining who each ID represents is half the fun of trunk

tracking!

Monitoring an Active ID

When the scanner stops on a transmission, you can

hold the scanner on that transmission.

1. Press HOLD. HOLD appears and the scanner

stays on the current ID.

2. If you want to listen to a different ID, use the num-

ber keys to enter the ID you want to hold.

3. Press HOLD again. HOLDand the channel number

flash and the scanner monitors that ID.

4. When you want to stop the hold and resume

searching for a data channel so you can continue

trunk tracking, press SRC.

Note: You can also follow these steps to hold on an ID

while scanning a scan list. See “Scan Lists” on

Page 48.

Temporarily Storing an ID into the Monitor

ID Memory

1. When your scanner stops on an ID you want to

store, press MON/CLEAR. The scanner stores the

ID into the monitor ID memory.

2. Press SRC to resume searching.

Note: To program the ID stored in the monitor ID mem-

ory into the ID scan list, see “Scan Lists” on Page 48.

Locking Out IDs

As with conventional scanning, it is possible to lock out

unwanted traffic. This is particularly important in trunk-

ed systems because signals you cannot listen to (such

as water meters, door alarms, traffic signals, and en-

crypted signals) are assigned IDs just like other users.

You can have up to 100 IDs locked out at one time.

Note: If you lock out an ID while searching, it is also

locked out of the scan list(s). See “Scan Lists” on

Page 48.

To lock out an ID, press L-OUT when the ID appears.

The ID is locked out, and the next active ID appears.

Unlocking a Single ID

1. Hold down L-OUT until you hear two short beeps.

2. Repeatedly press t or s to select the ID you want to

unlock.

3. Press L-OUT.

The ID is unlocked, and the next locked ID or

–– –––(if there are no other locked IDs) appears.

4. Press SRC to continue the scanner’s previous func-

tion.

Unlocking All IDs

Hold down L-OUT until you hear two short beeps. Then

press E to unlock all the IDs at once. The scanner

beeps twice.

Note: When you unlock all the IDs, the scan list ap-

pears. Press SCAN to scan the IDs stored in your scan

lists or press SRC to continue the scanner’s previous

function. For more information about scan lists, see

“Scan Lists” on Page 48.

Using Trunk Tracking Scan Delay

Many trunked systems have a period of 2 or more sec-

onds between a query and a reply. You can program a

5-second delay to hold on an ID for 5 seconds to wait

for a reply. The scanner continues to monitor the fre-

quency for 5 seconds after the transmission stops be-

fore resuming scanning.

Press DELAY to turn trunk tracking scan delay on or off.

DLYappears when trunk tracking scan delay is set.

Note: If you consistently miss responses even with

trunk tracking scan delay set, you might need to

change the default system type or the fleet map you

are using. See “Scanning Type I and Hybrid Trunked

Systems” on Page 50.

Monitoring IDs

You can use your scanner’s display to monitor the fre-

quencies in a trunked system for activity. You cannot

hear conversations in this mode, but this is an excellent

way to determine which talk groups are the most ac-

tive. To set the scanner to monitor IDs, hold down

MON/CLEAR until SEARCH and the channel number

flash, and all active talk group IDs appear in quick suc-

cession. To stop monitoring IDs, press SRC again.

Note: When you monitor IDs, locked-out IDs also ap-

pear.

CHANNEL ACTIVITY BARS

Your scanner has 20 channel activity indicators (bars)

which show the activity taking place on a trunked sys-

tem. You can see how many frequencies are being

used and generally monitor how much communication

traffic is occurring.

Each frequency you store in a trunking bank has a cor-

responding activity bar. However, since there are only

20 bars, but you can store up to 30 frequencies, some

bars might indicate more than one frequency if the

trunked system you are scanning has more than 20

channels.

• The bar that remains on steadily even when there

are no current transmissions represents the fre-

quency being used as the data channel.

• The bar that flashes when an ID appears repre-

sents the frequency being used by the radio to

transmit what you are currently hearing.

• If a bar turns on but you do not hear a conversa-

tion, the channel is probably being used for a tele-

phone interconnect call or a private call, or the bar

might be a locked-out ID. Your scanner does not

monitor these types of calls.

BANK

• If the scanner is holding on an ID which is not

active, the other activity bars turn on and off as

other groups use the system.

SCAN LISTS

When you program trunked frequencies into a bank

(see “Storing Trunked Frequencies” on Page 41), your

scanner sets up 5 scan lists into which you can store

your favorite IDs. Each list can contain up to 10 IDs, so

you can store a total of 50 IDs for each trunk tracking

bank (250 IDs if you use all banks as trunking banks!).

Scan lists help you organize trunking system users into

categories. For example, you might use List 1 for police

IDs, List 2 for fire department IDs, List 3 for emergency

medical service IDs, and so on. Once IDs are stored in

lists, you can scan them like you scan conventional

channels. You can program IDs into scan lists manual-

ly, during a search, or automatically.

Manually Storing IDs into Scan Lists

1. Select the trunking bank you want (see “Scanning

a Trunked Bank” on Page 43).

2. After the scanner begins trunk tracking, press

MAN. A number showing the current scan list

appears steadily at the top of the display, and bars

which show activity in other banks appear.

3. Press MAN then repeatedly press s or t to select

the ID scan list location (shown at the top of the

display) where you want to store an ID. Then,

press PROG to select the ID you want to store.

ID Scan List

4. Enter the Type II ID you want to store, then press

Or, to enter a Type I ID:

a. Use the number keys to enter the block number

and fleet number, then press .

•

b. Enter the subfleet number, then press E.

Note: To clear a mistake while entering an ID,

press 0 then E, then start over at Step 1.

5. Repeatedly press PROG or s to select the next

scan list location you want to program. Then repeat

Step 4 to enter another ID.

Moving IDs to Scan Lists

1. Press MAN. MANappears.

2. Select the ID scan list location where you want to

store the IDs. Then press PROG. PGMappears.

3. Press MON/CLEAR. A monitor ID appears.

4. Press E. The scanner stores the IDs into the

selected ID scan lists.

Deleting a Stored ID

1. Press PROG. PGMappears.

2. Repeatedly press s or t to select the scan list loca-

tion (shown at the top of the display) you want to

delete.

3. Press 0 then E.

SCANNING THE SCAN LISTS

Press SCAN to begin scanning the lists you have

stored.

Note:

If you have not stored any IDs, SCANscrolls on

the display, but your scanner does not stop on an ac-

tive conversation.

To remove a scan list from active scanning, use the

number keys to enter the scan list’s number. The scan

list number turns off, and the IDs in that list are not

scanned.

Note:

One scan list must always be active. You cannot

remove all of the scan lists.

To restore a scan list to active scanning, use the num-

ber keys to enter its number again.

Press SRC to return to the scanner’s previous function.

SCANNING TYPE I AND HYBRID

TRUNKED SYSTEMS

Your PRO-91 is set to scan Type II user IDs by default.

When you scan trunked frequencies, each Type II user

ID you see appears as an even number without a dash

(such as 2160). Your PRO-91 can also scan Type I

trunked systems. Each Type I ID appears as a three- or

four-digit number, followed by a hyphen, followed by a

one- or two-digit number (such as 200-14). If you no-

tice a mix of odd- and even-user IDs (such as 6477,

2160, 6481, 6144, and 1167), then you are probably

monitoring either a Type I or hybrid (a combination of

Type I and Type II user IDs) system (see “Types of

Trunking Systems” on Page 39).

You might also notice that you are missing responses

when you hold on an active ID. Unlike Type II systems,

Type I and hybrid systems require a fleet map that sets

specific fleet-subfleet parameters. It is easy to select a

fleet map to scan; what is not always easy is selecting

or programming a map that is being used in your partic-

ular area.

DATA

4. Press

again.

5. Repeatedly press s or t to select the name of the

map you want (such as E1P7). The prepro-

grammed fleet map appears.

6. Press E, then SRC. The scanner then searches for

transmissions using the preset map you chose.

Note: When the scanner searches for transmissions,

you see Type I fleet and subfleet IDs such as 100-12,

100-9, 000-12, or 400-8.

How do you know if the preset map you selected is cor-

rect? Listen to see if you are following complete conver-

sations. If not, try another preset map.

Programming a Fleet Map

1. Set the scanner for conventional scanning, press

PROG, then press TRUNK.

2. Select the bank where you want to program the

fleet map by pressing a number key.

DATA

3. Press

4. Repeatedly press s or t to select E1, then press

DATA

. A preprogrammed fleet map appears.

5. Repeatedly press s or t until USr appears. Then

press E.

DATA

6. Press

7. Repeatedly press s or t to select the size code for

the first block, then press E. The next available

block appears.

Block

8. Repeat Step 7 until you have selected a size code

for each block you want to work with.

When a Type I system is designed, the address infor-

mation for all its user IDs is divided into 8 equal-size

blocks, numbered 0–7, and each block is assigned a

size code. When you set up your scanner to track a

Type I system, you must choose a size code for each

block. When you have chosen a size code for all 8

blocks, you will have duplicated the fleet map for the

system you are tracking. If you have chosen correctly,

you will be able to track transmissions in that system.

Each size code defines the number of fleets, subfleets,

and IDs each block has. For example, you can see in

the following table that a size code of S-4 has one fleet,

which is divided into 16 separate subfleets, and it has a

total of 512 individual IDs.

Size

Fleets

Subfleets

IDs

Blocks

Used

S-0

Reserved block for Type II IDs

S-1

128

S-2

S-3

128

512

S-4

S-5

S-6

S-7

S-8

128

256

1024

2048

4096

S-9

S-10

S-11

S-12

S-13

S-14

Each ID in the block is unique. The left-most digit is the

block number in the ID. The next two digits identify

which fleet is active, and the last digit(s) (after the hy-

phen) identifies the subfleet.

The size codes selected by a Type I system designer

depend on the specific needs of the system's users.

Some organizations might want many subfleets with

only a few radios each, while another organization

might want only a few subfleets, with many radios each.

To scan Type I systems, you must select or program a

fleet map with the same size code assignments as the

trunked system. If you do this accurately, you will track

all the fleet and subfleet combinations used by the sys-

tem. In other words, you will hear complete communi-

cations while monitoring a trunked system.

Note: Preset fleet maps might be available at

www.trunkscanner.com.

If you do not already know the size codes used, you will

have to guess them. But since you do not have to figure

out all the blocks at once, this is not as hard as it

seems. Select a size code for a block, then press SRC.

Now listen to the communications. If you decide you are

receiving most of the replies to the conversations with

IDs assigned to the block you just programmed, then

you have probably selected the right size code and can

work on the next block of the map.

There are 16 preset fleet maps to choose from, and it is

best to start with these when setting up a Type I or hy-

brid trunk tracking bank. If none of the following preset

fleet maps allow you to follow complete conversations,

then you probably need to program your own fleet map

(see “Programming a Fleet Map” on Page 51).

E1P1

Size

E1P2

Size

E1P3

Size

Block

Code

S11

Block

Code

Block

Code

S12

(S12)

E1P4

Size

E1P5

Size

E1P6

Size

Block

Code

S12

(S12)

Block

Code

Block

Code

S10

S12

(S12)

S12

(S12)

S12

(S12)

E1P7

E1P8

E1P9

Size

Code

Size

Code

Size

Code

Block

S10

S11

E1P10

E1P11

E1P12

Size

Code

Size

Code

Size

Code

Block

E1P13

Size

E1P14

Size

Block

Code

Block

Code

S11

S10

S12

E1P15

E1P16

Size

Code

Size

Code

Block

S10

S11

S12

Selecting a Preset Fleet Map

1. Set the scanner for conventional scanning, press

PROG, then press TRUNK.

2. Select the bank where you want to store the preset

fleet map by pressing a number key.

DATA

3. Press

4. Repeatedly press s or t to select E1. Then, when

E1flashes, press E.

9. Press SRC. The scanner exits the trunking pro-

gramming mode, tunes the data channel, then

begins to search using the map you programmed.

Note: If you select size code S-12, S-13, or S-14, these

restrictions apply:

• S-12 can only be assigned to Blocks 0, 2, 4, or 6.

• S-13 can only be assigned to Blocks 0 and 4.

• S-14 can only be assigned to Block 0.

Since these size codes require multiple blocks, you will

be prompted for the next available block when pro-

gramming a fleet map. For example, if you assign

Block 0 as an S-12, the scanner prompts you for b2,

the next block available, instead of b1. And if you as-

sign Block 0 as an S-14, you would not see another

prompt because it uses all available blocks.

Programming a Hybrid System

A hybrid system is simply a Type I system with some of

its blocks designated as Type II blocks. To program a

hybrid system, follow the steps listed in “Programming

a Fleet Map” on Page 51. However, if you want a block

to be Type II, select size code S-0in Step 7.

A GENERAL GUIDE TO SCANNING

Reception of the frequencies covered by your scanner

is mainly “line-of-sight.” That means you usually cannot

hear stations that are beyond the horizon.

GUIDE TO FREQUENCIES

National Weather Frequencies

162.400

162.425

162.450

162.475

162.500

162.525

162.550

Canadian Weather Frequencies

161.650

161.775

163.275

Note:

These frequencies are not preprogrammed in the

weather service bank but can be manually programmed

into a channel.

Birdie Frequencies

Every scanner has birdie frequencies. Birdies are sig-

nals created inside the scanner’s receiver. These oper-

ating frequencies might interfere with broadcasts on the

same frequencies. If you program one of these frequen-

cies, you hear only noise on that frequency. If the inter-

ference is not severe, you might be able to turn

SQUELCH clockwise to cut out the birdie.

This scanner’s birdie frequencies (in MHz) are:

31.2000

138.7150

171.2500

413.1750

426.0500

455.7750

489.2500

813.4000

41.6000

145.6000

406.2250

413.2250

435.9500

465.6750

495.4000

820.9500

52.0000

148.6200

407.7625

416.1375

455.7625

475.5875

505.3000

822.3625

138.7100

165.3000

407.8125

426.0375

455.8625

485.4875

505.3125

899.2375

GUIDE TO THE ACTION BANDS

Typical Band Usage

VHF Band

Low Range

29.00–50.00 MHz

6-Meter Amateur

U.S. Government

2-Meter Amateur

High Range

50.00–54.00 MHz

137.00–144.00 MHz

144.00–148.00 MHz

148.00–174.00 MHz

UHF Band

U.S. Government

70-cm Amateur

Low Range

FM-TV Audio Broadcast, Wide

Band

406.00–420.00 MHz

420.00–450.00 MHz

450.00–470.00 MHz

470.00–512.00 MHz

Public Service

806.00–823.93 MHz

851.00–856.00 MHz

856.00–861.00 MHz

Conventional Systems

Conventional/Trunked Sys-

tems

Trunked Systems

Public Safety

High Range

33-Centimeter Amateur

Private Trunked

General Trunked

Fixed Services

861.00–866.00 MHz

866.00–868.93 MHz

896.11–902.00 MHz

902.00–928.00 MHz

935.00–940.00 MHz

940.00–941.00 MHz

941.00–944.00 MHz

944.00–952.00 MHz

Studio-to-Transmitter Broad-

cast Links

Private Fixed Services, Paging

952.00–956.00 MHz

Primary Usage

As a general rule, most of the radio activity is concen-

trated on the following frequencies:

VHF Band

Activities

Frequencies

Government, Police, and Fire

Emergency Services

Railroad

153.785–155.980 MHz

158.730–159.460 MHz

160.000–161.900 MHz

UHF Band

Activities

Frequencies

Land-Mobile “Paired” Fre-

quencies

450.000–470.000 MHz

Base Stations

Mobile Units

451.025–454.950 MHz

456.025–459.950 MHz

460.025–464.975 MHz

465.025–469.975 MHz

Repeater Units

Control Stations

Note: Remote control stations and mobile units operate

at 5 MHz higher 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 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 the “Police Call Ra-

dio Guide including Fire and Emergency Services,”

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

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-b.uP(

lic 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 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

VERY HIGH FREQUENCY (VHF)

VHF Low Band—(29–50 MHz—in 5 kHz steps)

29.000–29.700 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HAM

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

Aircraft Band—(108–137 MHz)

108.00–121.490 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AIR

121.500. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AIR Emergency

121.510–136.000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AIR

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 service.

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 MHz)

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

Private Trunked

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

General Trunked

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 necessary

conversions.

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

To convert MHz to kHz, multiply the number of mega-

hertz by 1,000:

9.62 (MHz) x 1000 = 9620 kHz

To convert from kHz to MHz, divide the number of kilo-

hertz by 1,000:

2780 (kHz) ÷ 1000 = 2.780 MHz

To convert MHz to meters, divide 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 they do not, take your scanner to your

local RadioShack store for assistance.

POSSIBLE

CAUSE

PROBLEM

REMEDY

Scanner is on but

will not scan.

SQUELCH is not

adjusted cor-

rectly.

Turn SQUELCH

clockwise.

Only one channel Store frequencies

or no channels

are stored.

into more than

one channel.

Scanner is totally

inoperative.

No power.

Check the batter-

ies or make sure

the AC adapter or

DC adapter is

connected prop-

erly.

Recharge the

rechargeable bat-

teries or replace

the non-recharge-

able batteries.

The AC adapter

or DC adapter is

not connected.

Be sure the

adapter’s barrel

plug is fully

plugged into the

POWER jack.

The scanner’s

display dims or

the scanner

Batteries are not

correctly

installed.

Make sure the

batteries are

installed properly.

sounds a tone

every 15 30 sec-

–

onds.

The batteries are

weak.

Recharge the

rechargeable bat-

teries or replace

the non-recharge-

able batteries.

Keypad does not

work.

The keylock func- To turn off the

tion is activated.

keylock, press

KEYLOCK until

disappears.

K/L

The batteries are

weak.

Recharge the

BATT.Lo

flashes.

rechargeable bat-

teries or replace

the non-recharge-

able batteries.

POSSIBLE

CAUSE

PROBLEM

REMEDY

POSSIBLE

CAUSE

An antenna is not

connected or

connected incor-

rectly.

Make sure an

antenna is con-

nected to the

scanner.

Programming

error.

Re-enter the fre-

quency correctly,

including the deci-

mal point.

Error

appears.

The scanner

Stored frequen-

Avoid storing fre-

locks on frequen- cies are the same quencies listed

cies that have an

unclear transmis- quencies.

sion.

as “birdie” fre-

under “Birdie Fre-

quencies” on

Page 57 or only

listen to them

manually.

Scanner will not

track a trunked

system.

The transmis-

sion might not

use a system that

can be tracked by

your scanner.

Scan another

transmission.

The data fre-

quency is miss-

ing.

Find the data fre-

quency (see

“Storing Trunked

Frequencies” on

Page 41).

The system you

are trying to track

is a Type I sys-

tem, and the

scanner is set to

scan Type II sys-

tems.

Set the scanner to

receive Type I

trunked frequen-

cies. See “Scan-

ning Type I and

Hybrid Trunked

Systems” on

Page 50.

Scanner is set to

receive Type I

trunked frequen-

cies, but does

not scan them.

The fleet map

you have select-

ed or entered

might be incor-

rect.

Check the fleet

map and correct it

if necessary (see

“Scanning Type I

and Hybrid

Trunked Sys-

tems” on Page 50

and “Program-

ming a Fleet Map”

on Page 51).

POSSIBLE

CAUSE

PROBLEM

REMEDY

Scanner will not

stop while scan-

ning a scan list.

No IDs have

been stored.

Store one or more

IDs (see “Scan

Lists” on Page 48.

The IDs you have Scan another

stored are not

active.

transmission.

Scanner will not

acquire a data

channel.

is not

Adjust squelch for

SQUELCH

correctlyadjusted trunk tracking.

for trunk tracking. See “Setting

Squelch for the

Trunk Tracking

Mode” on

Page 41.

The frequency

used for the data

channel is miss-

ing.

Press SRC to

search for the

data channel (see

“Storing Trunked

Frequencies” on

Page 41).

Missing replies to The system you

Set the scanner to

receive Type I

trunked frequen-

cies. See “Scan-

ning Type I and

Hybrid Trunked

Systems” on

conversations.

are trying to track

is a Type I sys-

tem, and the

scanner is set to

scan Type II sys-

tems.

Page 50.

The selected

Try another preset

fleet map is incor- fleet map or pro-

rect.

gram your own

fleet map (see

“Scanning Type I

and Hybrid

Trunked Sys-

tems” on

Page 50).

Missing replies to Not all of the

Enter all of the

conversations

(continued)

trunk’s frequen-

cies have been

entered.

trunk’s frequen-

cies (see “Storing

Trunked Frequen-

cies” on Page 41).

POSSIBLE

CAUSE

PROBLEM

REMEDY

Channel activity

bars are flashing

but no sound is

heard.

The transmis-

Scan for another

transmission.

sion might be a

private or tele-

phone intercon-

nect call. The

scanner does not

scan these types

of transmissions.

The ID shown is

not active.

Wait for the ID to

become active, or

scan another

transmission.

RESETTING THE SCANNER

If the scanner’s display locks up or does not work prop-

erly, you might need to reset the scanner.

Caution:

This procedure clears all the information you

have stored into the scanner. Before you reset the

scanner, try turning it off and on to see if it begins work-

ing properly. Reset the scanner only when you are sure

it is not working properly.

1. Turn off the scanner.

2. While you hold down the 2 and 9 keys, turn on the

scanner. CLEAR flashes for about 8 seconds as

the scanner clears its memory.

Note:

Do not turn off the scanner until CLEAR stops

flashing. Otherwise, the scanner might not clear its

memory properly.

CARE AND MAINTENANCE

Your RadioShack PRO-91 150-Channel Handheld

Trunking 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 recommended

size and type. Always remove old and

weak batteries. They can leak chemicals

that destroy electronic 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 electron-

ic 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 oc-

casionally to keep it looking new. Do not

use harsh chemicals, cleaning solvents,

or strong detergents to clean the scan-

ner.

Modifying or tampering with the scanner’s internal com-

ponents can cause a malfunction, invalidate your scan-

ner’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)

851.0000–868.9875 MHz (in 12.5 kHz steps)

896.1125–956.0000 MHz (in 12.5 kHz steps)

Monitor Channels 5

Number of Banks 5

Sensitivity (AM/FM):

NFM: 20 dB S/N at 3 kHz deviation):

29–54 MHz 0.5 µV

137–174 MHz 0.4 µV

406–512 MHz 0.4 µV

806–956 MHz 0.6 µV

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

108–136.9875 MHz 1.5 µV

Spurious Rejection (at 40.84 MHz) 50 dB

Selectivity:

10 kHz –6 dB

15 kHz –50 dB

IF Rejection (at 162.4 MHz) 80 dB

Channels ............................................................... 150

Operating Temperature .... –4 to 140 F (–20 to 60 C)

Scan Speed ............................... 50 Channels/Second

Search Speed:

Normal ....................................... 100 Steps/Second

Hypersearch .............................. 300 Steps/Second

Service .............................. 50 Frequencies/Second

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

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

IF Frequencies 380.7 MHz, 10.85 MHz, and 450 kHz

Antenna Impedance 50 Ohms

Audio Output ................................. 350 mW maximum

Built-in Speaker ...............1⁷/¹⁶Inches (36 mm) 8 Ohm,

Dynamic Type

Maximum Current Drain .................................. 180 mA

Power Requirement:

4 AA Alkaline Batteries (6.0 VDC),

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

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

or DC Adapter (Cat. No. 270-1560)

Current Drain:

Squelched .................................................. 70 mA

Full Output ............................................... 180 mA

Dimensions (HWD) ............... 6¹/⁴× 2¹/²× 1⁹/¹⁶Inches

(158 × 63 × 40 mm)

Weight (without antenna, batteries, belt clip) ..... 8.1 oz

(229 g)

Specifications are typical; individual units might vary.

Specifications are subject to change and improvement

without notice.

NOTES

Limited One-Year Warranty

This product is warranted by RadioShack against manufacturing de-

fects in material and workmanship under normal use for one (1) year

from the date of purchase from RadioShack company-owned stores

and authorized RadioShack franchisees and dealers. EXCEPT AS

PROVIDED HEREIN, RadioShack MAKES NO EXPRESS WAR-

RANTIES AND ANY IMPLIED WARRANTIES, INCLUDING THOSE

OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PUR-

POSE, 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 PERSON

OR ENTITY WITH RESPECT TO ANY LIABILITY, LOSS OR DAM-

AGE CAUSED DIRECTLY OR INDIRECTLY BY USE OR PERFOR-

MANCE 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 CONSEQUENTIAL DAMAGES, EVEN

IF RadioShack HAS BEEN ADVISED OF THE POSSIBILITY OF

SUCH DAMAGES.

Some states do not allow the limitations on how long an implied war-

ranty lasts or the exclusion of incidental or consequential damages,

so the above limitations 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 RadioShack store. RadioShack will, at its option, unless other-

wise 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. Repaired or re-

placed parts and products are warranted for the remainder of the

original warranty period. You will be charged for repair or replace-

ment of the product made after the expiration of the warranty period.

This warranty does not cover: (a) damage or failure caused by or at-

tributable to acts of God, abuse, accident, misuse, improper or abnor-

mal usage, failure to follow instructions, improper installation or

maintenance, alteration, lightning or other incidence of excess volt-

age or current; (b) any repairs other than those provided by a Ra-

dioShack Authorized Service Facility; (c) consumables such as fuses

or batteries; (d) cosmetic damage; (e) transportation, shipping or in-

surance costs; or (f) costs of product removal, installation, set-up ser-

vice 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

UBZZ01274ZZ

Printed in the Philippines

3A8

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