RadioShack Pro 92b Handheld Scanner Owners Manual

							51Trunking Operation
Notes:
 
• If you select 
-- instead of LT, MO, or ED, the
scanner does not scan trunked frequencies.
Instead, you see:
• If you programmed a Motorola Type I or Hybrid
system, see “Programming Fleet Maps” on
Page 53.
3. Press 
PGM to enter the program mode.
4. Store the trunking frequencies into subsequent
channels in the same bank (see “Storing Known
Frequencies into Channels” on Page 30).
5. Repeatedly press 
MODE to select the trunking mode
— 
LT for EF Johnson, MO for Motorola, or ED for
the EDACS (GE/Ericsson) system.
6. Press 
SCAN. If the scanner’s receive mode matches
the ID mode, 
T appears and the scanner scans the
frequencies.
Programming Motorola Trunking Systems 
(UHF-Lo)
You can program the scanner to receive transmissions
in the UHF-Lo band (380–512 MHz) of the Motorola
trunking system. You can receive these transmissions
by:
• Checking the trunking system’s control channel.
You must program the system’s base frequency and
offset frequency to do this.
• Decoding the subaudible data transmitted with the
signals. When you do this, the scanner might detect
wrong IDs but you can easily receive trunking fre-
quencies without programming the base and offset
frequencies.
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							52
Trunking Operation
Notes:
• Base and offset frequencies vary for each type of
trunking system. You can get information about
these frequencies for the trunking system you want
to scan using 
www.trunkscanner.com, other Int er -
ne t sou rc es,  o r lo cal ly-published guidebooks.
• The scanner automatically decodes subaudible data
it receives in the VHF band.
• If you try to enter an offset frequency in the VHF and
UHF-Hi bands (137–174 and 806–960 MHz), the
scanner will ignore the entry.
Follow these steps to program Motorola trunking fre-
quencies in the UHF-Lo band.
1. Select the bank, then press 
PGM to enter the pro-
gram mode.
2. Store the base frequency into channel 00 of the
bank you selected, then store the trunking frequen-
cies into subsequent channels in the same bank.
3. Press 
TRUNK then repeatedly press MODE to select
MO (Motorola).
4. Press 
FUNC then 9. 12.5 kHz (the default offset
frequency) appears.
5. Repeatedly press 
FUNC then 9 to select the offset
frequency you want (
12.5 kHz, 25.0 kHz, or 50
kHz
). 
Note:
 Offset frequencies above 50 kHz do not
appear and are used only for subaudible decoding
mode.
6. Program the trunking frequencies (see “Program-
ming Trunking Frequencies” on Page 50).
Offset Frequency
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							53Trunking Operation
PROGRAMMING FLEET MAPS
You must set the fleet map if you want to receive a Mo-
torola Type I system. Fleet maps are included along with
other information about Motorola Type I systems at
www.trunkscanner.com. 
Follow these steps to program a fleet map.
1. Press 
PGM then TRUNK.
2. For each bank you want to program, repeatedly
press 
FUNC,  , or   to select the bank.
3. Press 
FUNC.
4. Press 
8. The following display appears:
5. Enter the size code supplied with the Type I system
information, referring to the instruction that appears
on the display. If the information was not supplied,
try the following common fleet maps.
B
L
O
C
KSize Code
123 4 5 6 7 8
0 S11 S4 S4 S12 S4 S3 S10 S1
1 S11 S4 S4 — S4 S10 S10 S1
2 S11 S4 S4 S4 S12 S4 S11 S2
3 S11 S4 S4 S4 — S4 S4 S2
4 S11 S4 S4 S4 S4 S12 S4 S3
5 S11 S4 S4 S4 S4 — S4 S3
6 S11 S4 S12 S4 S4 S12 S4 S4
7 S11 S4 — S4 S4 — S4 S4
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							54
Trunking Operation
6. Press ENTER for each entry. If you make a mistake,
press 
CL and enter the correct size code.
Note:
 The default setting of the bank is for Motorola
Type II. However, if you set Type I and you want to
return to Type II, enter 
15 at Step 5.
7. To confirm the input, repeat Steps 1–5 and press
ENTER. Each time you press ENTER, you confirm
the size code. If you find an error, press 
CL and
begin again at Step 1.
8. Press 
SCAN to start scanning.
TALK GROUP IDS
You can program up to 100 talk group IDs in each bank.
When the scanner stops on a transmission in the LTR,
Motorola, or EDACS mode, it checks to see if the ID has
been stored. In the closed mode, the scanner only stops
on the transmission and displays its text tag if you have
stored and not locked out the ID. In the open mode, the
scanner always stops on a transmission, but it displays
the ID’s text tag if you have stored the ID.B
L
O
C
KSize Code
9 1011 1213 141516
0S4S0S4S0S3 S4S4S3
1S4S0S0S0S3 S3S4S10
2S0S0S0S0S11S10S4S10
3S0S0S0S0S4 S4S11S11
4S0S0S0S0S4 S4S11S0
5S0S0S0S0S0 S4S0S0
6S0S4S0S0S0 S12S12S12
7S0S4S0S4S0 — — —
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							55Trunking Operation
Storing Talk Group IDs
To store a talk group ID when scanning, press TRUNK
when the scanner stops on a transmission. The bottom
line changes to 
ID#XXXX, indicating that the ID is
stored.
Note:
 When you try to store more than 100 talk group
IDs in a bank, 
Memory full! appears. Clear some
talk group IDs in order to store new ones (see “Clearing
Talk Group IDs” on Page 56).
Follow these steps to manually store talk group IDs or to
edit a stored ID.
1. Press 
PGM.
2. Press 
TRUNK.
3. To select the bank where you want to store the ID,
press 
FUNC then   or  .
4. Press 
MODE to select LT, MO, or ED.
5. Enter the talk group ID and press 
ENTER. If neces-
sary, use the decimal point for a hyphen.
Note:
 If you made a mistake in Step 4, 
Invalid
ID
. appears and the scanner beeps when you
press 
ENTER. Start again at Step 3.
6. Press 
TEXT and enter the text tag for the ID, then
press 
ENTER.
7. To store the next ID memory in sequence, press 
and repeat Steps 4 and 5 to enter more IDs.
8. Press 
SCAN to start scanning.
Talk Group ID Hold
You can set your scanner to follow a trunking signal that
you want to track during scanning.
 Hold down TRUNK for
more than 2 seconds.
 ID hold ON. appears.
To release ID hold, press 
SCAN or TRUNK.
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							56
Trunking Operation
Locking Out Talk Group IDs
Note:
 You can only lock out talk group IDs when the
scanner is in the closed mode (see “Open and Closed
Modes” on Page 57).
1. Press 
PGM.
2. Press 
TRUNK.
3. Press 
FUNC,  or   to move the desired bank.
4. Press   or   to select the ID memory.
5. Press 
L/OUT to lock out the ID. L appears.
6. To remove the lockout from a trunking ID, manually
select the ID memory, and press 
L/OUT until L dis-
appears.
Reviewing Locked-Out Talk Group IDs
Note:
 You cannot clear all lockouts from a talk group at
the same time.
1. Press 
PGM then TRUNK.
2. Press 
FUNC then L/OUT. The locked out ID appears.
If the ID memory bank has no locked out ID, you
hear the low beep tone.
3. Press 
FUNC then  or  to select a search bank.
Or, just press
  or  to search for any locked
out IDs in a bank.
Clearing Talk Group IDs
1. Press PGM then TRUNK.
2. Press 
FUNC,   or   to select ID memory.
3. Press 
FUNC then CL.
Clearing All Talk Group IDs in One Bank
You can clear all talk group IDs within a bank. This lets
you quickly delete all talk group IDs from a bank (for ex-
ample, if you want to use the bank to store a different set
of talk group IDs).
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							57Trunking Operation
1. Press PGM.
2. Press 
TRUNK to enter a talk group ID memory
mode.
3. Select a talk group ID bank using 
FUNC,   or  .
4. Press 
FUNC then 3. Confirm list clear
?1=YES
 Press other key for NO. appears.
5. Press 
1 to clear the all talk group IDs within a bank.
Please Wait then List Cleared appears.
Note:
 To cancel the deletion, press any key except 
1.
The scanner returns to the talk group ID memory mode.
OPEN AND CLOSED MODES
When set to the open mode, the scanner only uses the
ID list to look up ID text tags and stops on any ID code.
When set to the closed mode, the scanner stops only on
signals that have an ID code which is found in the ID list
for the bank.
Note:
 When you select a channel manually, any trans-
mission opens squelch, regardless of the current mode.
The open or closed mode is set in each channel storage
bank. 
+ or – appears under the channel storage bank’s
number while scanning. Or, the status display shows the
OPEN/CLOSED mode at the top line while the scanner
is in manual mode or receiving a signal during scanning.
 Closed Mode
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							58
A General Guide to Scanning
When no ID code is programmed into the scanner, it re-
ceives the signal in PL, DPL, LTR, MOT, or ED mode.
Changing the Open/Closed Mode
1. Press MANUAL.
2. Press 
FUNC then   or   to select the channel
storage bank.
3. Press 
FUNC then 2. Bank OPEN or Bank
CLOSED
 appears. After that message disappears,
the 10th digit on the top line of the display changes
from 
+ to –
 or vice versa.
4. Repeat Steps 2–3 for each bank.
ˆA 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.Mode Open Closed
PL 
and 
DPLAccepts any PL and 
DPL.Accepts only the PL 
or DPL stored in the 
channel.
MOT/
ED/
LTRStops on any transmis-
sion. If the ID is stored, 
displays the text tag. 
Otherwise, displays 
the talk group ID.Only stops on a 
transmission if the 
ID is stored. Dis-
plays the text tag.
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							59A General Guide to Scanning
GUIDE TO FREQUENCIES
US Weather Frequencies
Ham Radio Frequencies
Ham radio operators often transmit emergency informa-
tion when other means of communication break down.
The chart below shows the frequencies the scanner re-
ceives that ham radio operators normally use:
Birdie Frequencies
Every scanner has birdie frequencies. Birdies are sig-
nals created inside the scanner’s receiver. These oper-
ating frequencies might interfere with transmissions on
the same frequencies. If you program one of these fre-
quencies, you hear only noise on that frequency. If the
interference is not severe, you might be able to turn
SQUELCH clockwise to cut out the birdie. 
This scanner’s birdie frequencies (in MHz) are:
162.400 162.425 162.450 162.475
162.500 162.525 162.550
Wavelength Frequencies (MHz)
10-Meter 29.000–29.700
6-Meter 50.000–54.000
2-Meter 144.000–148.000
70-cm 420.000–450.000
33-cm 902.000–928.000
29.0000 147.7650 415.3375 475.2375
31.9500 150.1500 419.3375 479.2375
32.1000 151.7600 423.3250 483.2250
35.9400 155.7500 427.3125 487.2250
38.4000 159.7450 429.0500 491.2125
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							60
A General Guide to Scanning
To find the birdies in your scanner, begin by disconnect-
ing the antenna and moving it away from the scanner.
Make sure that no other nearby radio or TV sets are
turned on near the scanner. Use the search function and
scan every frequency range from its lowest frequency to
the highest. Occasionally, the searching will stop as if it
had found a signal, often without any sound. This is a
birdie. Make a list of all the birdies in your scanner for fu-
ture reference.
42.9750 163.7400 431.3125 495.2125
43.9300 167.7300 435.3000 499.2000
47.9250 171.5500 439.3000 503.2000
49.9200 383.3875 443.2875 507.1875
51.9150 387.3750 447.2875 511.1875
54.0000 391.3750 451.2750 814.7000
108.0000 395.3750 455.2750 818.0125
115.8125 399.3625 459.2625 820.1125
123.8000 403.3625 463.2625 823.2625
131.7875 407.3500 467.2500 944.0500
139.7750 411.3500 471.2500 960.0000
143.7700
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