RadioShack Pro 91 Handheld Trunking Scanner Owners Manual

							51
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.
3. Press 
.
4. Repeatedly press s or t to select E1, then press
. A preprogrammed fleet map appears.
5. Repeatedly press s or t until 
USr appears. Then
press 
E.
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.
8. Repeat Step 7 until you have selected a size code
for each block you want to work with.
DATA
DATA
DATA
DATA
Block 
						

							52
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.
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.Size Fleets Subfleets IDs Blocks 
Used
S-0 Reserved block for Type II IDs
S-1 128 4 16 1
S-2 16 8 64 1
S-3 8 8 128 1
S-4 1 16 512 1
S-5 64 4 32 1
S-6 32 8 32 1
S-7 32 4 64 1
S-8 16 4 128 1
S-9 8 4 256 1
S-10 4 8 256 1
S-11 2 16 256 1
S-12 1 16 1024 2
S-13 1 16 2048 4
S-14 1 16 4096 8 
						

							53
The size codes selected by a Type I system designer
depend on the specific needs of the systems users.
Some organizations might want many subfleets with
only a few radios each, while another organization
might want only a few subfleets, with many radios each.
To scan Type I systems, you must select or program a
fleet map with the same size code assignments as the
trunked system. If you do this accurately, you will track
all the fleet and subfleet combinations used by the sys-
tem. In other words, you will hear complete communi-
cations while monitoring a trunked system.
Note: Preset fleet maps might be available at
www.trunkscanner.com.
If you do not already know the size codes used, you will
have to guess them. But since you do not have to figure
out all the blocks at once, this is not as hard as it
seems. Select a size code for a block, then press 
SRC.
Now listen to the communications. If you decide you are
receiving most of the replies to the conversations with
IDs assigned to the block you just programmed, then
you have probably selected the right size code and can
work on the next block of the map.
There are 16 preset fleet maps to choose from, and it is
best to start with these when setting up a Type I or hy-
brid trunk tracking bank. If none of the following preset
fleet maps allow you to follow complete conversations,
then you probably need to program your own fleet map
(see “Programming a Fleet Map” on Page 51).
E1P1 E1P2 E1P3
BlockSize
Code BlockSize
Code BlockSize
Code
0S110S40S4
1S111S41S4
2S112S42S4
3S113S43S4
4S114S44S4
5S115S45S4
6 S11 6 S4 6 S12
7 S11 7 S4 7 (S12) 
						

							54
E1P4 E1P5 E1P6
BlockSize
Code BlockSize
Code BlockSize
Code
0S120S40S3
1 (S12) 1 S4 1 S10
2 S4 2 S12 2 S4
3S43(S12)3S4
4S44S44S12 
5 S4 5 S4 5 (S12)
6S46S46S12
7 S4 7 S4 7 (S12)
E1P7 E1P8 E1P9
BlockSize
Code BlockSize
Code BlockSize
Code
0S100S10S4
1S101S11S4
2S112S22S0
3S43S23S0
4S44S34S0
5S45S35S0
6S46S46S0
7S47S47S0
E1P10 E1P11 E1P12
BlockSize
Code BlockSize
Code BlockSize
Code
0S00S40S0
1S01S01S0
2S02S02S0
3S03S03S0
4S04S04S0
5S05S05S0
6S46S06S0
7S47S07S4 
						

							55
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.
3. Press .
4. Repeatedly press s or t to select 
E1. Then, when
E1 flashes, press E.
E1P13 E1P14
BlockSize
Code BlockSize
Code
0S30S4
1S31S3
2S112S10
3S43S4
4S44S4
5S05S4
6 S0 6 S12
7 S0 7 S12
E1P15 E1P16
BlockSize
Code BlockSize
Code
0S40S3
1 S4 1 S10
2 S4 2 S10
3S113S11
4S114S0
5S05S0
6S126S12
7S127S12
DATA 
						

							56
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-0 in Step 7. 
						

							57
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
Canadian Weather Frequencies
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:
162.400 162.475 162.525
162.425 162.500 162.550
162.450
161.650 161.775 163.275
31.2000 41.6000 52.0000 138.7100
138.7150 145.6000 148.6200 165.3000
171.2500 406.2250 407.7625 407.8125
413.1750 413.2250 416.1375 426.0375
426.0500 435.9500 455.7625 455.8625
455.7750 465.6750 475.5875 485.4875
489.2500 495.4000 505.3000 505.3125
813.4000 820.9500 822.3625 899.2375 
						

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GUIDE TO THE ACTION BANDS
Typical Band Usage
Primary Usage
As a general rule, most of the radio activity is concen-
trated on the following frequencies:
VHF BandVHF Band
Low Range 29.00–50.00 MHz
6-Meter Amateur 50.00–54.00 MHz
U.S. Government 137.00–144.00 MHz
2-Meter Amateur 144.00–148.00 MHz
High Range 148.00–174.00 MHz
UHF Band
U.S. Government 406.00–420.00 MHz
70-cm Amateur 420.00–450.00 MHz
Low Range 450.00–470.00 MHz
FM-TV Audio Broadcast, Wide 
Band470.00–512.00 MHz
Public Service 806.00–823.93 MHz
Conventional Systems 851.00–856.00 MHz
Conventional/Trunked Sys-
tems856.00–861.00 MHz
Trunked Systems 861.00–866.00 MHz
Public Safety 866.00–868.93 MHz
High Range 896.11–902.00 MHz
33-Centimeter Amateur 902.00–928.00 MHz
Private Trunked 935.00–940.00 MHz
General Trunked 940.00–941.00 MHz
Fixed Services 941.00–944.00 MHz
Studio-to-Transmitter Broad-
cast Links944.00–952.00 MHz
Private Fixed Services, Paging 952.00–956.00 MHz
Activities Frequencies
Government, Police, and Fire 153.785–155.980 MHz
Emergency Services 158.730–159.460 MHz
Railroad 160.000–161.900 MHz 
						

							59
UHF Band
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
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  (P u b -
lic Safety, Local Government, Forestry Conservation)
PSB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Public Safety
PTR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  Private TrunkedActivities Frequencies
Land-Mobile “Paired” Fre-
quencies450.000–470.000 MHz
Base Stations 451.025–454.950 MHz
Mobile Units 456.025–459.950 MHz
Repeater Units 460.025–464.975 MHz
Control Stations 465.025–469.975 MHz 
						

							60
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