Cat. No. 20-521
Owner’s Manual
PRO-91 150-Channel
Handheld Trunking Scanner
Please read before using this equipment.
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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.
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3
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
5
5
5
10-Meter Ham Band
VHF Lo
50–54
6-Meter Ham Band
108–136.9750
137–144
12.5 Aircraft
5
5
5
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
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4
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-
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5
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
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6
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
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7
Frequency Conversion 63
Troubleshooting 64
Resetting the Scanner ..................................... 67
Care and Maintenance .......................................... 68
Specifications ........................................................ 69
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8
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.
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9
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.
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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.
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11
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).
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12
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).
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13
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.
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14
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.
a
variety of BNC
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15
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.
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16
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.
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17
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
A
is the tuning location of a station (ex-
pressed in kHz or MHz). To find active frequencies,
search
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).
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18
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.
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19
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
a
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.
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20
(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
P
— 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.
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21
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
S
(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).
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22
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.
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23
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.
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24
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.
1
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.
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25
•
•
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.
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26
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
on
a
transmission,
quickly ss either:
•
•
HOLD to stop search-
ing so you can listen
to the transmission.
HOLDappears.
MON/CLEAR to store
the displayed fre-
quency into he cur-
rent monitor mmory.
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.
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27
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.
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28
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 sanner stores
the frequein memory
and
amatically
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).
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29
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, N/CLEAR, then
the nmber of the moni-
tor memory you want to
–
listen to (1 5).
Note: To listen to the
monitor mmories, the
priority chanel 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 chnel where
you want to store
the frequency in a
monitor
memory,
then press PROG.
PGMapears.
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30
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.
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31
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.
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32
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
contis scanning
agaiDLYappears.
• 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.
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33
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.
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34
1. Press PROG.
2. Enter the channel number you want to select as
the priority channel, then press PRIORITY.
P
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.
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35
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).
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36
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
S
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 1/2 second 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.
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37
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
press
.
appears. To turn off the feature,
DATA
again.
DATA
disappears.
DATA
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38
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.
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39
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.
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40
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.
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41
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.
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42
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.
ID
3. To return to conventional scanning, press TRUNK
again.
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43
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
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.
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44
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.
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45
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.
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46
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
2
• 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.
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47
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
E.
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48
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.
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49
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.
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50
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.
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51
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
16
8
4
16
1
1
1
1
1
1
1
1
1
1
1
2
4
8
S-2
8
64
S-3
8
128
512
32
S-4
1
16
4
S-5
64
32
32
16
8
S-6
8
32
S-7
4
64
S-8
4
128
256
256
256
1024
2048
4096
S-9
4
S-10
S-11
S-12
S-13
S-14
4
8
2
16
16
16
16
1
1
1
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.
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52
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
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
S11
S11
S11
S11
S11
S11
S11
Block
Code
Block
Code
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
S4
0
1
2
3
4
5
6
7
S4
S4
S4
S4
S4
S4
S4
S4
S4
S4
S4
S4
S12
(S12)
S4
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53
E1P4
Size
E1P5
Size
E1P6
Size
Block
Code
S12
(S12)
S4
Block
Code
Block
Code
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
S4
0
1
2
3
4
5
6
7
S3
S4
S10
S4
S12
(S12)
S4
S4
S4
S4
S12
(S12)
S12
(S12)
S4
S4
S4
S4
S4
S4
E1P7
E1P8
E1P9
Size
Code
Size
Code
Size
Code
Block
Block
Block
0
1
2
3
4
5
6
7
S10
S10
S11
S4
0
1
2
3
4
5
6
7
S1
S1
S2
S2
S3
S3
S4
S4
0
1
2
3
4
5
6
7
S4
S4
S0
S0
S0
S0
S0
S0
S4
S4
S4
S4
E1P10
E1P11
E1P12
Size
Code
Size
Code
Size
Code
Block
Block
Block
0
1
2
3
4
5
6
7
S0
S0
S0
S0
S0
S0
S4
S4
0
1
2
3
4
5
6
7
S4
S0
S0
S0
S0
S0
S0
S0
0
1
2
3
4
5
6
7
S0
S0
S0
S0
S0
S0
S0
S4
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54
E1P13
Size
E1P14
Size
Block
Code
Block
Code
0
1
2
3
4
5
6
7
S3
0
1
2
3
4
5
6
7
S4
S3
S3
S11
S4
S10
S4
S4
S4
S0
S4
S0
S12
S12
S0
E1P15
E1P16
Size
Code
Size
Code
Block
Block
0
1
2
3
4
5
6
7
S4
0
1
2
3
4
5
6
7
S3
S4
S10
S10
S11
S0
S4
S11
S11
S0
S0
S12
S12
S12
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.
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55
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.
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56
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
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57
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
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58
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
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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
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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
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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
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62
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.
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POSSIBLE
CAUSE
PROBLEM
PROBLEM
REMEDY
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).
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64
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).
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65
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.
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66
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.
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67
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 ...............17/16 Inches (36 mm) 8 Ohm,
Dynamic Type
Maximum Current Drain .................................. 180 mA
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68
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 × 19/16 Inches
(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.
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69
NOTES
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70
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71
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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