RadioShack Pro 2052 Vhf Uhf Scanner Reciever Owners Manual

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The fleets might be the police depart-
ment, the fire department, the utilities,
and city administration. The police
might decide to further divide its fleet
into subfleets such as dispatch, tacti-
cal operations, detectives, north,
south, east, and west side patrols, and
supervisors. All the available police ra-
dios 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 program-
ming
.
The disadvantage of a Type I system
is that the brief burst of data sent
when a user transmits must contain
the radio’s talk group 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 accom-
modate fewer users than Type II sys-
tems. 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 mon-
itor Type II systems, but you can
change to Type I or a hybrid of Type I
and Type II systems by selecting a pre
programmed fleet map or creating a
custom fleet map for your area (see
“Scanning Type I and Hybrid Trunked
Systems” on Page 40).You do not need to determine the
fleet-subfleet hierarchy for Type II sys-
tems unless you are tracking hybrid
systems that contain both Type I and
Type II systems.
SETTING THE SCANNER 
TO THE TRUNK 
SCANNING MODE
Press TRUNK to switch between the
scanner’s conventional and trunk
scanning modes.
SETTING SQUELCH FOR 
THE TRUNK SCANNING 
MODE
The squelch setting can affect how
fast your scanner acquires the data
channel, and in some instances, can
prevent your scanner from acquiring
the data channel at all.
Adjusting 
SQUELCH is necessary to
track transmissions precisely.
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We recommend you set SQUELCH to
the position shown here before select-
ing a trunked bank.
Note:
 Change this setting as neces-
sary to get the best performance in
your area.
PROGRAMMING 
TRUNKED 
FREQUENCIES
Before you program your scanner to
track a trunked system, consider the
following:
• Valid trunked system frequencies
are as shown below.
Motorola system:
935.0125–939.9875 MHz
(in 12.5 kHz steps)
851.0000–868.9875 MHz
(in 12.5 kHz steps)
406.0000–512.0000 MHz
(in 12.5 kHz steps)
137.0000–174.0000 MHz
(in 5 kHz steps)
Ericsson EDACS system:
900.0000–956.000 MHz
(in 12.5 kHz steps)806.0000–899.9875 MHz
(in 12.5 kHz steps, except
cellular frequencies)
406.0000–512.0000 MHz
(in 12.5 kHz steps)
137.0000–174.0000 MHz
(in 5 kHz steps)
• You can use any of your scanner’s
banks as either a trunk scanning
bank or conventional scanning
bank, but you cannot mix the two. 
• The scanner only scans one
trunked system at a time. Al-
though you can store frequencies
for more than one trunked system
in one of your scanner’s banks,
the scanner only scans the fre-
quencies associated with the first
data channel it finds.
Before scanning a trunked system’s
transmissions, you must store the
trunked system’s frequencies in one of
the banks in your scanner by following
these steps.
1. Set the scanner for conventional
scanning, then hold down 
TRUNK
until the scanner beeps twice.
BANK, TRUNK, and the bank
numbers flash.
2. Press a number key to select the
bank for the trunked system’s fre-
quencies. To select a bank
between 11 and 20, press 
SHIFT
then the number keys. The scan-
ner displays one of six system
types. 
3. Use s
 or t
 to select the system
type, then press 
E. 
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4. Use the number keys to enter the
trunked system’s frequencies,
then press
 E.
Note:
 If you entered an invalid fre-
quency, the scanner beeps, the
channel number flashes and
Error appears. Press CLEAR to
clear the frequency, then repeat
Step 4.
5. Press either 
MANUAL or s
 to
select the next channel in the
bank.
6. Repeat Steps 4 and 5 until all fre-
quencies have been entered.
SCANNING A TRUNKED 
BANK
You can scan one trunked bank at a
time. Once you have stored frequen-
cies for a trunked system in one or
more of the 20 available banks, and
you are scanning non-trunked fre-
quencies, follow these steps to begin
trunk scanning.1. Turn on the scanner and begin
scanning in conventional mode.
2. Press 
TRUNK. The indicators for
all banks that have been pro-
grammed with trunked frequen-
cies flash, and 
TRUNK and BANK
appear.
3. To see all banks programmed with
Motorola system frequencies,
press s
. All banks programmed
with Motorola system frequencies
flash. To see all banks pro-
grammed with EDACS system fre-
quencies, press s
 again. All
banks programmed with EDACS
system frequencies flash. 
4. Use the number keys to activate
the trunked bank you want to
scan.   appears under the
selected bank’s number.
5. Press 
SEARCH. As the scanner
searches for the trunk’s data
channel (the channel that con-
trols the trunk), 
SEARCH flashes.
When the scanner finds the data
channel, it begins trunk scanning. 
If you entered all of the trunk’s fre-
quencies, you should be able to
follow conversations between
broadcasters even when they
change frequencies. IDs which
represent different service groups
appear.
Note:
 To see the bank currently in
use (for about 5 seconds), press
DATA.
6. To return to conventional scan-
ning, press 
TRUNK again.
You See Trunk System
E 1Motorola Type I,
800 MHz frequencies
EdEDACS frequencies
E2 – UHFMotorola Type II,
UHF frequencies
E2 – HiMotorola Type II,
VHF frequencies
E2 – 800Motorola Type II,
800 MHz frequencies
E2 – 900Motorola Type II,
900 MHz frequencies
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Hint:
 While scanning, you will not
know exactly whom the talkgroup IDs
are assigned to until you listen awhile
or until you locate talkgroup ID lists in
frequency guides or on internet sites
such as www.trunkscanner.com. With-
in a few minutes, you can usually fig-
ure out if what you are listening to is a
police, fire, or emergency medical 2-
way radio user. Other talkgroup IDs
might take some time, but determining
whom each ID represents is half the
fun of trunk scanning!
Turning Banks On or Off 
During Trunk Scanning
As in conventional scanning, you can
turn each channel-storage bank on
and off during trunk scanning. When
you turn off a bank, the scanner does
not scan any of the 50 channels in that
bank.
1. Press 
DATA. All active trunk bank
numbers appear.
2. Press the number key for the bank
you want to add or delete.
If the bank number is off, the scanner
does not scan any of the channels
within that bank.
Skipping the Trunked Bank
To skip to another trunked bank while
you are listening to a trunked bank,
hold down 
DATA.
Turning Status Bit Ignore
On or Off
You can set how your scanner works
with 
status bits (also called S-bits), let-
ting you control how the scanner inter-
prets and displays talkgroup IDs.
The last four bits of a Motorola Type II
talkgroup ID (a binary 16-bit code) are
the status bits. In some systems, sta-
tus bits identify special situations
(such as an emergency status). 
Your scanner is preset to assume that
the status bits in a talkgroup ID are set
to 0 and ignores them. For example,
when the scanner receives the talk-
group ID 010111001110 0011, 
it
reads the ID as 010111001110 0000
and converts the first 12 bits of the ID
to 23776 (the talkgroup ID). However,
since the status bit value is 3 (0011
converted to decimal equals 3), the ID
is actually 23779.
If you are scanning a Motorola Type I
system and do not have a fleet map
for that system, you might have to turn
off status bit ignore in order to deter-
mine the proper fleet map. 
Important:
 If you are scanning any
system other than a Motorola Type I
system, be sure status bit ignore is set
to 
ON or you will miss some transmis-
sions.
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Follow these steps to turn status bit ig-
nore on or off.
1. Hold down 
SCAN until the current
status bit ignore setting (
ON or
OFF) appears.
2. Press s
 or t 
to select 
ON or OFF,
then press 
E.
Identifying a Trunked 
Frequency 
To identify a trunked frequency, press
t
 when the scanner stops on a talk-
group ID. The trunked frequency brief-
ly flashes twice. To show the fre-
quency longer, hold down t
. The
scanner beeps, then the trunked fre-
quency and talkgroup ID alternate.
Switching EDACS Format
The EDACS system uses two group
ID formats: Agency-Fleet-Subfleet
(AFS) and Decimal. If you use a list of
IDs shown in one format (AFS) and
the ID you want to receive is in the
other format (such as decimal, for ex-
ample), hold down 
SVC to switch to
the decimal format. The ID appears in
decimal format and 
E flashes.
EDACS ID Range Search
To make searching for EDACS IDs
faster, set a range for the Agency or
Fleet listings. Simply use the number
keys to enter the Agency or the Agen-
cy and the Fleet listing, then press
SEARCH. Note the following exam-
ples.
Example 1 
Agency = 01
Press 0
 1
 .
 SEARCH
.
01 --- appears during search.
Example 2
Agency = 01, Fleet = 01
Press 0
 1
 .
 0
 1
 SEARCH
.
01-01- appears during search.
To stop an ID range search, press
SEARCH again.
Using Trunk Scanning Scan 
Delay
Many trunked systems have a period
of 2 or more seconds between a trans-
mission and a reply. You can pro-
gram  a  5-second delay so the
scanner holds on an ID for 5 seconds
to wait for a reply. The scanner contin-
ues to monitor the frequency for 5 sec-
onds after the transmission stops
before resuming scanning.
Press 
DELAY to turn trunk scanning
scan delay on or off. 
DELAY appears
when trunk scanning scan delay is
set.
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Note:
 If you consistently miss re-
sponses even with trunk scanning
scan delay set, you might need to
change the default system type or the
fleet map you are using. See “Scan-
ning Type I and Hybrid Trunked Sys-
tems” on Page 40.
Monitoring an Active ID
When the scanner stops on a trans-
mission, follow these steps to hold the
scanner on that transmission. 
Note: 
You can also follow these steps
to hold on an ID while scanning a scan
list. See “Scan Lists” on Page 37.
1. Press 
HOLD. HOLD appears and
the scanner stays on the current
ID.
2. To continue trunk scanning, press
SEARCH.
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 can-
not listen to (such as water meters,
door alarms, traffic signals, and en-
crypted signals) are assigned IDs just
like other users. You can lock out up
to 100 IDs.
To lock out an ID, press 
L/O when the
ID appears. The ID is locked out, and
the next active ID appears.Note: 
If you lock out an ID while
searching, it is also locked out of the
scan list(s). See “Scan Lists” on
Page 37.
Unlocking a Single ID
1. Hold down L/O until you hear two
short beeps.
2. Repeatedly press t
 or s
 to select
the ID you want to unlock.
3. Press 
L/O. The ID is unlocked and
the next locked ID appears.
4. Press 
SEARCH to resume the pre-
viously selected function.
Unlocking All IDs
Hold down L/O 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 mode appears. Press
SCAN to scan the IDs stored in your
scan lists or press 
SEARCH to resume
the previously selected function. For
more information about scan lists, see
“Scan Lists” on Page 37.
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MONITORING IDS
You can use your scanner’s display to
monitor the frequencies 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 active.
To set the scanner to monitor IDs,
hold down 
SEARCH until the scanner
beeps twice. 
SEARCH flashes, and all
talk group IDs appear in succession.
To stop monitoring IDs, press
SEARCH again.
Note: 
When you monitor IDs, locked-
out IDs also appear.
CHANNEL ACTIVITY 
INDICATORS
Your scanner has 20 channel activity
indicators (bars). The bars show that
transmissions are being received on a
trunked system.
You can use the bars to tell how many
frequencies are being used and gen-
erally monitor how much communica-
tion traffic is occurring on a trunked
system. 
• A 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 represents the frequency
being used by the radio you are
currently hearing.
• If a bar turns on but you do not
hear a conversation, the channel
is probably being used for a tele-
phone interconnect call or a pri-
vate call, or the indicator might be
a locked-out ID. Your scanner
does not monitor these types of
calls.
• If the scanner is holding on an ID
which is not active, the other bars
turn on and off as other groups
use the system
A bar appears for each frequency you
store in a trunking bank.
SCAN LISTS
When you program trunked frequen-
cies into a bank (see “Programming
Trunked Frequencies” on Page 32),
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 scanning bank (1000 IDs if you
use all banks as trunking banks). 
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Scan lists help you organize trunking
system users into categories. For ex-
ample, 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 pro-
gram IDs into scan lists manually, dur-
ing a search, or automatically.
Manually Storing IDs into 
Scan Lists
1. Select the desired trunking bank
(see “Scanning a Trunked Bank”
on Page 33).
2. After the scanner begins trunk
scanning, press 
MANUAL. A scan
list number appears at the top of
the display, and a bar shows the
channel activity.
3. Repeatedly press s
 or t
 to select
the scan list location you want to
program.
4. Enter the Type II ID you want to
store, then press 
E.
Or, to enter a Type I ID:
a. Use the number keys to enter
the block number and the fleet
number, then press 
•.b. Enter the subfleet number, then
press
 E.
Note: 
To clear a mistake while
entering an ID, press 
CLEAR, then
start over at Step 4.
Or, to enter an EDACS ID:
a. Use the number keys to enter
the agency number, then press 
•.
b. Enter the fleet number, then the
subfleet number, then press 
E.
5. Repeatedly press 
MANUAL or s
to select the next scan list location
you want to program. Then repeat
Step 4 to enter another ID.
Storing IDs into Scan Lists 
While Searching
Follow these steps to select a scan list
location and store an ID during a
search.
1. When your scanner stops on an
ID you want to store, press 
PRI-
ORITY
. The currently selected
scan list memory location flashes.
2. Press 
E to store the ID in the
selected scan list memory loca-
tion. Or, repeatedly press s
 or t
to select another location, then
press 
E.
3. Press 
SEARCH to resume search-
ing.
Scan List Number
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Automatically Storing an ID in 
a Scan List Location
To store an ID in the first available
scan list location during a search,
press 
E at any time after the scanner
stops on that ID.
Or, follow these steps to store an ID in
a specific scan list location.
1. Press 
PRIORITY when the desired
ID appears.
2. Repeatedly press s
 or t
 to
choose a specific scan list loca-
tion. 
3. Press 
E.
Note:
 An ID you enter into a scan list
location automatically overwrites any
ID that is already stored in that loca-
tion.
To display a scan list location and
store an ID in that location during a
search, press 
PRIORITY to display the
current scan list location, then press 
E
when your scanner stops on an ID you
want to store. 
Deleting a Stored ID
1. Press MANUAL.
2. Repeatedly press s
 or t
 to select
the scan list location (shown at the
top of the display) you want to
delete.
3. Press 
0 then E.
SCANNING THE SCAN 
LISTS
Press SCAN to begin scanning the
lists you have programmed. 
Id
SCAN
 scrolls on the display.
Note:
 If more than one of the scan IDs
you have stored do not work, 
Error
flashes twice and the scanner beeps
several times, then the scan list num-
bers appear at the top of the display.
To remove a scan list from active
scanning, use the number keys to en-
ter the scan list’s number. The scan
list indicator turns off, and the IDs in
that list are not scanned. 
Note: 
You cannot remove all the scan
lists. One scan list must always be ac-
tive.
To restore a scan list to active scan-
ning, use the number keys to enter its
number again.
Press 
SEARCH to return to the previ-
ously selected function. 
Priority ID Scanning
As in conventional scanning, you can
designate one ID in each scan list as a
priority ID.
To select an ID as a priority ID, hold
down 
PRIORITY for about 2 seconds
when the scanner stops on the ID. 
P
appears.
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Press PRIORITY to turn on priority
scanning. 
Note:
 Priority scanning does not work
if the ID is locked out.
SCANNING TYPE I AND 
HYBRID TRUNKED 
SYSTEMS
Your PRO-2052 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 num-
ber without a dash (such as 2160).
Your PRO-2052 can also scan Type I
trunked systems. Each Type I ID ap-
pears 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 notice a mix of odd- and even-
user IDs (such as 6477, 2160, 6481,
6144, and 1167), then you are proba-
bly 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 30).
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 se-
lect a fleet map to scan; what is not al-
ways easy is selecting or program-
ming a map that is being used in your
particular area.When a Type I system is designed,
the address information for all its user
IDs is divided into 8 equal-size blocks,
numbered 0–7, and each block is as-
signed 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 du-
plicated 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 S4
has one fleet, which is divided into 16
separate subfleets, and it has a total
of 512 individual IDs.
Size Fleets Sub-
fleetsIDs Block 
Used
S0 Reserved block for Type II IDs
S1 128 4 16 1
S2 16 8 64 1
S3 8 8 128 1
S4 1 16 512 1
S5 64 4 32 1
S6 32 8 32 1
S7 32 4 64 1
S8 16 4 128 1
Size Fleets Sub-
fleetsIDs Block 
Used
S9 8 4 256 1
S10 4 8 256 1
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