NOTE: Actual product may vary from the images found
in this document.
Please read this user’s guide before installing,
setting up and using your new product
www.radioshack.com
Contents
Thank you for purchasing your PRO-2055 triple trunking
scanner from RadioShack. You can mount your scanner
in a fi xed position and use it as a base scanner or you can
use it as a mobile scanner by mounting it in a vehicle. No
additional hardware or add-on cards are needed. This
scanner is one of a new generation of scanners designed
to track Motorola® Type I and II (such as Smartnet®
and Privacy Plus®) and hybrid analog trunking systems,
GE-Ericsson (EDACS®) type systems, and EF Johnson
(LTR) type systems which are extensively used in many
communication systems.
user’s guide • quick start guide • preloaded data addendum
DC cable w/fuse
Scanner
DIN sleeve and keys (2)
2
Antenna
AC adapter
Mounting
bracket
Knob (2)
Rubber washer (2)
Lock washer (2)
Screw (2)
Rubber foot (3)
The Basics
contents
your scanner’s keypad 7
your scanner’s rear view 9
your scanner’s display 10
step 1: install your scanner 11
mounting your scanner in your dashboard 11
mobile mounting in your vehicle 12
using your scanner as a base station 13
step 2: power your scanner 14
from a wall outlet 14
through your vehicle’s ignition 15
from your vehicle’s cigarrette lighter 16
step 3: connect your scanner 17
connect the supplied antenna 17
connect an external antenna 17
connect an external speaker or headphones 18
quick start 20
understanding your scanner’s modes 20
setting up your scanner 29
turning on the scanner and setting squelch 29
3
The Basics
storing known frequencies into channels 30
CTCSS and DCS 32
storing trunking frequencies into channels 35
storing text tags 36
fi nding and storing active
frequencies
searching a preprogrammed frequency
range 40
band charts 42
searching active frequencies in a range 47
manually tuning a frequency 49
listening to the weather band 50
skywarn 52
using frequency copy 53
Signal Stalker II 55
scanning the channels 57
using CTCSS and DCS 59
deleting frequencies from channels 59
deleting all frequencies in a channel bank 60
using delay 60
locking out channels or frequencies 61
priority 63
changing the receive mode 65
using the attenuator 66
turning the key tone on and off 67
using the dimmer 67
changing the display contrast 67
cloning the programmed data 68
40
4
The Basics
trunking 69
how trunking works 69
setting squelch for trunking mode 71
programming trunking frequencies 71
care 85
replacing fuse 85
resetting/initializing your scanner 85
service and repair 86
birdie frequencies 86
RadioShack, RadioShack.com. Hypersearch, Hyperscan, and Adaptaplug are
trademarks used by RadioShack Corporation.
Motorola, Smartnet, ASTRO and Privacy Plus are registered trademarks of
Motorla Inc.
EDACS is a registered trademark of MA-COM Inc.
LTR is a registered trademark of EF Johnson.
6
The Basics
your scanner’s keypad
TRUNK — stores the trunking ID code or holds
the trunking ID while scanning.
L/OUT — locks out selected channels and ID
codes, and skips specifi ed frequencies during
a search.
CLEAR — clears an incorrect entry.
PROG — programs frequencies in selected
channels.
PWR/VOL/SQ — long knob turns OFF/ON, and
controls volume. Short knob controls squelch.
PC/IF — connect data cable for cloning or
connecting to a PC.
s — attach headphones with 1/8” jack here.
7
The Basics
combination with other keys
to perform various functions.
activate att
scanner sensitivity, block
strong signals). Press again to
deactivate attenuation.
FUNC — press in
TUNE — Press TUNE,
PAUSE then e or d to tune
to a frequency.
ATT — Press to
enuation (reduce
PAUSE — pauses search
or tune operation.
DIM — adjusts the
backlight level (Light, Dark,
the seven preprogrammed
weather channels, or jumps
to a Skywarn channel you
TEXT — press to input text.
or OFF).
WX/
— scans through
programmed (997-999).
SRCH — press to search
through search banks.
MAN — press to manually
enter a channel number.
or d — press to
e
scan or search in either
direction.
PRI — turns the
priority function on or off.
MODE — press to
change the receive mode.
— scans
SCAN/
through the programmed
channels, or activates the
Signal Stalker II function.
8
The Basics
Press to enter a number or a
character (in text mode).
./DELAY — press to enter a
decimal point, space, or hyphen.
Press to program delay time for a
channel/search bank.
ENT — press to
confi rm frequency
and text entries.
your scanner’s rear view
ANT — connect the
supplied antenna or an
external antenna here.
SCREW HOLE — use to mount
the scanner in a car with some
hardware (screw not supplied).
RESET—
press to
reset your
scanner.
DC 13.8V — connect a
power source here.
EXT SP — connect an
external speaker here.
9
The Basics
your scanner’s display
10
The Basics
step 1: install your scanner
You can mount your trunking scanner in your vehicle,
install it for mobility, or install it as a base station.
mounting your scanner in your
dashboard
If you are unsure about how to install your scanner in
your vehicle, consult your automobile manufacturer,
dealer, or a qualifi ed installer. Before installing, confi rm
your scanner fi ts in the
desired mounting area and
you have all the necessary
materials. Your scanner
requires a 2 x 71/8 x 5 5/16
inch (50 x 180 x 135 mm)
mounting area.
1. Remove the four
rear screws and pull
off the black case
before installing your
scanner.
2. Install the DIN sleeve
into the opening in
your dashboard, lip
facing out.
3. Push out the top and
bottom tabs to hold
the sleeve fi rmly in
place.
4. Slide the scanner into the sleeve until it locks in
place.
11
The Basics
Note
Note
To remove your scanner from the DIN sleeve,
insert the two keys straight into the scanner’s front
panel. Then, remove the scanner by pulling front
panel.
When mounting in your dashboard, you will need
to connect an external antenna and an external
speaker.
mobile mounting in your vehicle
You can mount your scanner under the dashboard, or
on top of it, using the mounting bracket.
1. Attach the three protective rubber feet to the
mounting bracket
when you use
the scanner on a
fl at surface. Do
not use them
when you mount
the bracket with
screws.
2. Use the supplied
mounting
bracket as a
template to mark
positions for the
two mounting
screws.
3. At the marked
positions, drill holes slightly smaller than the
screws.
12
The Basics
Note
4. Remove the paper backing from each washer and
stick one inside of each bracket’s ear, aligning the
washer’s hole with the bracket’s hole.
5. Attach the mounting bracket to your vehicle’s
surface using the supplied screws and lockwashers.
6. Slide the scanner into the bracket, aligning the
scanner’s holes with the holes in the bracket, and
then screw the mounting knobs into the scanner.
Note
When drilling holes, be sure to avoid obstructions
behind the mounting surface. Consult a qualifi ed
installer if in doubt.
using your scanner as a base station
You can place your scanner on a desk, shelf, or table
to use it as a base station. Since the speaker is on
the bottom of the scanner, you may want to use the
mounting bracket to elevate your scanner off the
surface for better sound. Follow the mobile vehicle
mounting instructions above to affi x your scanner to a
desk, shelf, table or other fl at surface (except that the
bracket will be below the scanner).
13
The Basics
Note
Warning!
step 2: power your scanner
You can power your scanner from a wall outlet,
through your vehicle’s ignition, or from your vehicle’s
cigarette lighter.
from a wall outlet
Note
Warning!
1. Connect the tip of the supplied AC adapter to the
DC 13.8V jack at the rear of your scanner.
2. Plug the AC adapter into your wall outlet.
You must use a Class 2 power source that supplies
13.8V DC and delivers at least 600mA. Its center
tip must be set to positive and its plug must fi t the
scanner’s DC 13.8V jack. Using an adapter that does
not meet these specifi cations could damage the
scanner or the adapter.
To prevent electric shock, do not use the AC
adapter’s polarized plug with an extension cord,
receptacle, or other outlet unless you can fully
insert the blades to prevent blade exposure.
14
The Basics
Note
Note
through your vehicle’s ignition
1. Disconnect the cable from the negative (-) terminal
of your vehicle’s battery.
2. Ground the black wire
of the supplied DC
power cord to your
vehicle’s chassis.
Note
Note
Be sure the grounding
screw makes complete contact with the metal
frame of your vehicle.
3. Connect the red wire of the supplied DC power
cord to a voltage source that turns on and off with
the ignition switch, such as a spare accessory
terminal in your vehicle’s fuse box.
4. Insert the power
cord’s barrel plug
into the scanner’s
DC 13.8V jack.
5. Reconnect the cable
to the negative
(-) terminal of your
Rear View
vehicle’s battery.
You must use a power source that supplies 12V DC
and delivers at least 600 mA. Its center tip must be
set to positive and its plug must fi t the scanner’s
DC 13.8V jack. The supplied DC power cord meets
these specifi cations. Using a power cord that does
not meet these specifi cations could damage the
scanner or the adapter.
15
The Basics
Notes
from your vehicle’s cigarrette lighter
To power your scanner from a 12V power source in
your vehicle, such as a cigarette-lighter socket, you
need a 12V, 600 mA DC cigarette-lighter adapter (not
supplied), available at your local RadioShack store.
1. Insert the adapter’s barrel plug into the scanner’s DC
13.8V jack.
2. Plug the adapter’s other end into your vehicle’s
cigarette lighter or power socket.
Notes
When you use a cigarette-lighter adapter, you
might hear electrical noise from your engine while
scanning. This is normal.
16
The Basics
step 3: connect your scanner
connect the supplied antenna
Push the antenna onto
your scanner’s antenna
connector and rotate
until it locks into place.
Your scanner’s
sensitivity to various
frequencies depends
on its location and the antenna’s length. For best
reception, adjust the antenna’s length as follows:
FrequencyAntenna Length
25-54 MHzExtend fully
108-174 MHzExtend 4 segments
216-225 MHzExtend 3 segments
225-406 MHzExtend 2 segments
406-1300 MHzCollapse fully
connect an external antenna
You will need to connect an external antenna when you
mount your scanner in
the dashboard of your
vehicle. You may also
want to connect an
external antenna if you
use your scanner as a
base station.
17
The Basics
Warning!
Your local RadioShack store sells a variety of antennas.
Always use 50-ohm coaxial cable, such as RG-58 or
RG-8, to connect an outdoor antenna. For lengths
exceeding 50 feet, use RG-8 low-loss dielectric coaxial
cable. If your coaxial cable does not have a BNC
connector, you will also need a BNC adapter (not
supplied).
Warning!
Use extreme caution when installing or removing
an outdoor antenna. If the antenna starts to fall,
let it go! It could contact overhead power lines.
If the antenna touches a power line, touching
the antenna, mast, cable, or guy wires can cause
electrocution and death. Call the power company
to remove the antenna. Do not attempt to do so
yourself.
connect an external speaker or
headphones
When you mount your scanner in your dashboard,
you will need to connect an external speaker or
headphones.
Connect
headphones here
18
Connect external
speaker here
The Basics
listening safely
To protect your hearing, follow these guidelines when
you use headphones.
•
Adjust VOL (volume) to its lowest level before
putting on headphones. With the headphones on,
adjust VOL to a comfortable level.
• Avoid increasing the volume once you set it. Over
time, your sensitivity to volume decreases, so
volume levels that do not cause discomfort might
damage your hearing.
• Avoid listening at high volume levels. Prolonged
exposure to high volume levels can cause
permanent hearing loss.
traffi c safety
Do not wear headphones while driving. This can create
a traffi c hazard and is illegal in some areas. Even
though some headphones let you hear outside sounds
when you listen at normal levels, they still can present
a traffi c hazard.
19
The Basics
Note
quick start
To help familiarize yourself with the scanner’s
functions, keypad, and available frequencies, you can
utilize one of these four features before you begin
programming the scanner.
Signal Stalker II — searches nearby strong signals
quickly. See “Signal Stalker II”.
Preprogrammed Search Banks — allow you to listen to
frequencies and decide which frequencies you want to
store when you are ready to program the scanner. See
“Searching a Preprogrammed Frequency Range”.
Manual Tuning — allows you to manually move
through the entire range of available frequencies. (See
“Specifi cations” for a list of the available frequency
ranges.)
Weather Radio — allows you to listen to NOAA
weather broadcasts without programming. See
“Listening to the Weather Band”.
understanding your scanner’s modes
You can program each channel with any of seven
receive modes (AM, FM, CT, DC, MO, ED, and LT).
Each receive mode affects how your scanner operates
when scanning and receiving transmissions.
Note
Trunked modes (MO, ED and LT) can only be
selected for frequencies above 137 MHz.
Your scanner’s closed mode lets you hear only
those trunking talkgroups you specify. For more
information, see “Open and Closed Modes”.
20
The Basics
AM mode
The AM mode sets the scanner to receive
transmissions using amplitude modulation (AM),
primarily used for aircraft, military, some amateur
radio, and some government transmissions. (Refer to
“Specifi cations” for a list of the frequencies covered.)
When the scanner receives a transmission on a
channel set to the AM mode, it always stops on the
transmission.
FM mode
The FM mode sets the scanner to receive transmissions
using frequency modulation (FM), used for most public
safety transmissions, as well as broadcast, business,
and amateur radio transmissions. When the scanner
receives a transmission on a channel set to the FM
mode, it always stops on the transmission.
CTCSS (CT) mode
CTCSS mode sets the scanner to receive transmissions
using frequency modulation (FM) with Continuous
Tone Coded Squelch System (CTCSS) subaudible
tone codes. CTCSS allows multiple users to share a
single radio frequency without hearing each other’s
transmissions. CTCSS mode also features a Code
Search setting that allows you to instantly display and
store unknown codes into the channel memory. CTCSS
tones can sometimes be heard as a low “hum” in the
background of a voice transmission.
21
The Basics
DCS (DC) mode
DCS mode sets the scanner to receive transmissions
using frequency modulation (FM) with Digital Coded
Squelch (DCS) subaudible data signaling. DCS is
very similar to CTCSS, except that a digital code is
transmitted instead of an audio tone. Like CTCSS, DCS
allows multiple users to share a single radio frequency
without hearing each other’s transmissions. DCS mode
also features a Code Search setting that allows you
to instantly display and store unknown codes into the
channel memory. DCS data can sometimes be heard
as a low “purring” sound in the background of a voice
transmission. Some DCS systems transmit a special
“turn off code” at the end of each transmission. The
turn off code causes a properly equipped receiver to
mute before the transmission ends, eliminating the
“squelch tail” burst of noise the commonly occurs
when the signal is lost.
Motorola mode
You can set your scanner so it decodes the talk group
IDs used with Motorola trunking systems. This setting
is called the Motorola mode.
Motorola systems are trunking systems used primarily
by business and public safety groups to effi ciently
allocate a small number of frequencies (as few as
fi ve) to many groups of users (as many as several
thousand). To do this, each group of users in the
system is assigned to a specifi c talk group. For
example, the east side patrol offi cers might all be
assigned to talk group 2160. One channel in the system
is continuously transmitting data that identifi es which
talk groups are active on which channel. In addition,
22
The Basics
Note
this talk group information is also transmitted as
subaudible data on each active channel.
When the scanner receives a transmission on a channel
set to the Motorola mode, it fi rst decodes the talk
group ID data included with the transmission. In the
open mode, the scanner stops on the transmission
and displays the talk group ID on the bottom line of
the display. In the closed mode, the scanner only stops
on the transmission if the talk group ID matches a talk
group ID that you have stored in the bank’s talk group
ID list and have not locked out.
Motorola trunking systems come in three categories:
Type I, Type II, and Type I/II Hybrid. Each category
displays and uses talk group IDs in slightly different
ways.
Motorola Type II IDs are in the form FFF-SS, where;
FFF=Fleet ID
SS=Subfl eet ID
Type I systems are usually organized with different user
groups assigned to different fl eets.
Note
For example, a valid fl eet-subfl eet ID identifying
all detectives within a police department might be
000-12, where 000 identifi es all police users and 12
identifi es the Detective division.
Tuning the scanner to an active control channel
while in Motorola mode will display the Motorola
System. ID and the approximate control channel
message decode success rate. This information can
help you identify the Motorola trunking system that
you are monitoring and the receive quality of the
control channel signal.
23
The Basics
Note
To properly map the raw Type I data to the correct
fl eet-subfl eet format, you must program the correct
fl eet map into the scanner. Fleet map information
is widely available on the Internet for most Type I
systems in use.
Type II system talk groups are identifi ed by a 5-digit
number. Valid talk group IDs are divisible by 16. If you
try to enter an invalid talk group ID, the scanner rounds
the ID down to the next valid ID.
Type I/II hybrid systems use both fl eet-subfl eet and
5-digit formats for talk group IDs.
Note
If the scanner decodes control channel data while
receiving transmissions from a Motorola trunking
system, CNTRL appears on the bottom line of the
display.
EDACS mode
You can set your scanner so it decodes the talk group
IDs used with EDACS (GE/Ericsson) trunking systems.
This setting is called the EDACS mode.
EDACS systems are trunking systems used
primarily by business or private communications
service providers, as well as by some public safety
organizations. EDACS systems transmit active talk
group information only on a dedicated control channel.
EDACS frequencies are organized in a specifi c order.
Each frequency is assigned a Logical Channel Number
(LCN). For the scanner to correctly switch to an active
frequency, you must program the frequencies in LCN
order, starting with Memory 01. EDACS talk group IDs
are entered as a 4-digit decimal number from 0001 to
2047 or AFS (Agency Fleet Subfl eet) number from 00001 to 15-157.
24
The Basics
When there is activity on an EDACS system, that
information is sent out on the control channel. The
scanner decodes the ID for the active talk group. In the
open mode, the scanner then goes to the transmission
and displays the talk group ID on the bottom line of the
display. In the closed mode, the scanner only goes to
transmissions with IDs that match talk group IDs you
have stored in the bank’s talk group ID list which are
not locked out.
Because EDACS scanning requires clear reception of
the control channel at all times, EDACS systems tend
to have a smaller usable area. An external antenna can
greatly improve EDACS scanning in a fringe area. If
you are having trouble scanning an EDACS system, try
manually selecting the data channel. If you are getting
good reception, the scanner will indicate talk group
CTL-01. Try changing your location or using an outdoor
antenna to improve reception.
LTR m od e
You can set your scanner so it decodes the talk group
IDs used with LTR systems. This setting is called the
LTR mode.
LTR frequencies are organized in a specifi c order.
Each frequency is assigned a Home Repeater Number
(HR). For the scanner to correctly switch to an active
frequency, you must program the frequencies in HR
order, starting with Memory X01 in the selected bank.
Your PRO-2055 scanner features a new tool to help
you determine the correct channel mapping for LTR
system frequencies. The scanner’s LTR Repeater Finder
displays the current Home Repeater when monitoring
LTR transmissions in manual mode.
25
The Basics
To determine the correct Home Repeater programming,
enter the system channels of an LTR system in any
order. Be sure to program the mode for each LTR
channel to LT. Listen to each channel one at a time
in manual mode and watch for the decoded LTR
data at the bottom of the scanner’s display. When
an LTR transmission occurs, you should see the LTR
talkgroup information on the bottom line of the display,
and a number preceded by “R” in the bottom right
hand corner (i.e., R12). The “R” number is the Home
Repeater number that the current transmission is
occurring on. To correctly program this Home Repeater
number into your scanner, be sure that the channel
number in the bank is equal to the number that is
displayed after the “R”. For example, if you see R12
displayed on a particular LTR frequency, that frequency
needs to be programmed into Channel 12 of the
current bank in order to track the LTR system activity
properly.
LTR systems are trunking systems used primarily by
business or private communications service providers,
such as taxicabs, delivery trucks, and repair services.
These systems encode all trunking information
as digital subaudible data that accompanies each
transmission. Users on an LTR system are assigned to
specifi c talk groups, which are identifi ed by the radio
as six-digit numbers. These numbers are in the form
AHHUUU, where:
A = Area code (0 or 1)
H = Home repeater (01 through 20)
U = User ID (000 through 254)
When the scanner receives a transmission on a channel
set to the LTR mode, it fi rst decodes the LTR data
included with the transmission. In the open mode,
the scanner stops on the transmission and displays
26
The Basics
Note
the talk group ID on the bottom line of the display.
In the closed mode, the scanner only stops on the
transmission if the LTR data matches a talk group ID
that you have stored in the bank’s talk group ID list and
have not locked out.
LTR systems are frequently programmed so that each
radio has a unique ID code.
open and closed modes
You can set your scanner to change the way it receives
signals. These settings, called open mode and closed
mode, affect how the scanner receives signals from
communications systems that use some type of closed
squelch (such as Motorola, EDACS, and LTR systems).
Note
In open mode, you hear all active talk groups
except those you specifi cally exclude, making it
easy to hear everything going on. In closed mode,
you hear only those talk groups you specify. This
makes it easy to listen only to talk groups you are
interested in and exclude others.
When you select a system voice channel manually,
any transmission opens squelch, regardless of the
current mode.
When no ID code is programmed into the
scanner, it receives the signal in MO, ED, or LT
mode. In open mode, the scanner stops on any
transmission. If the ID is stored, the text tag
appears on the display. Otherwise, the talk group
ID appears on the display. In closed mode, the
scanner only stops on a transmission if the ID is
stored.
You can set each of the scanner’s channel storage
banks to open or closed mode.
27
The Basics
In open mode, the scanner scans signals transmitted in
all systems. The scanner stops on any ID code and only
uses the ID list to look up ID text tags.
In closed mode, the scanner stops only on signals that
have an ID code which is found in the ID list for the
bank. Also, the scanner scans signals transmitted only
under the following conditions:
• When the signals are in the FM, CT, or DC mode.
• When the signals are in the MO, ED, or LT mode
and the signal’s ID code matches the programmed
ID code
You can also select the user or talk groups you want
the scanner to receive in closed mode.
When you set a channel storage bank to open mode,
+ appears under the bank’s number while scanning.
When you set a channel storage bank to closed mode,
- appears under the channel storage bank’s number
while scanning. OPEN or CLOSED appears while the
scanner is in manual mode or while the scanner is
receiving a signal during scanning. See “Changing the
Open/Closed Mode” for more information about setting
the open and closed modes.
28
The Basics
Note
setting up your scanner
turning on the scanner and setting
squelch
1. To turn on the scanner, turn VOL clockwise. Multisystem Trunking Scanner appears. After about 3
seconds, you might hear a hissing sound. Then
adjust VOL to a comfortable level.
2. Turn SQ fully counterclockwise, then turn SQ
clockwise until the hissing sound stops.
3. To turn off the scanner, turn VOL counterclockwise
to OFF.
Note
The scanner does not scan if there are no
frequencies stored in channels. If the scanner does
not scan and you have already stored frequencies
in channels, turn SQ further clockwise.
If the scanner picks up unwanted, partial, or very
weak transmissions, turn SQ clockwise to decrease
the scanner’s sensitivity to these signals. If you
want to listen to a weak or distant station, turn SQ
counterclockwise.
If SQ is adjusted so you always hear a hissing
sound, the scanner will not scan properly.
To ensure the scanner operates properly while in
the trunking mode, we suggest you set SQ using
the steps listed above.
If SQ is adjusted precisely at the threshold where
the hissing sound stops, the radio will be most
sensitive to very weak signals. The radio may also
receive unwanted noise or signals that are too
29
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