PRO-92 Handheld Scanner
(200-0522A) Trunking Operation Faxback Doc. # 61683
The scanner tracks transmissions that use the Motorola Type l and Type II
(such as Smartnet and Privacy Plus) and hybrid analog trunking systems,
plus GE/Ericsson (EDACS) and EF Johnson (LTR) type systems, which are
extensively used in many communication systems.
Trunking systems allocate a few frequencies to many different users. When
the mobile unit transmits a signal, one frequency is chosen from among the
allocated frequencies in that trunking system. The user's ID talk group
is sent with the signal.
To receive trunking signals, you must store all the trunking group
frequencies in one bank (see "Storing Known Frequencies into Channels" in
Faxback Doc. # 61681) and input ID codes in the ID memory (see "Storing
Talk Group IDs" below). To listen to the transmission, the mode of the
programmed channel must be the same as that of the trunking channel (LT,
MO, or ED).
When an ID code is received, the ID list for the bank is searched, and
if found, the text name stored for the ID appears. If not found, scanning
resumes immediately unless the bank is in open trunking mode.
Note: There might be more than one talk group transmitting at a time in
some Motorola trunking systems. If you set the scanner to manually
tune in Motorola trunking mode, you will hear the talk group on that
channel, but the display will alternate between all active IDs.
Trunking group frequencies are included in the supplied Police Call
trunking Guide. Frequency fleet map and talk group information is also
widely available on the internet, at www.trunkscanner.com for example.
Understanding Trunking
In the past, groups that transmit frequently, such as police departments,
could transmit only on a few frequencies. This resulted in heavy traffic
and often required 2-way radio users to wait for a specific frequency to
clear before transmitting. Trunked systems allow more groups of 2-way
radio users to use fewer frequencies. Instead of selecting a specific
frequency to transmit on, a trunked system chooses one of several
frequencies when the 2-way radio user transmits. The system automatically
transmits the call on that frequency and also sends a code that identifies
that 2-way radio user's transmission on a control channel.
This scanner lets you easily hear both the call and response transmissions
for that 2-way radio user and therefore follow the conversation. For EDACS
and Motorola (above 806 MHz range), the scanner monitors the control
channel between each transmission to identify talk groups. For some
Motorola (under 512 MHz range) and LTR systems, the scanner uses the
subaudible data sent with each transmission to identify talk groups.
Setting Squelch for the Trunking Mode
Your scanner automatically mutes the audio during trunk scanning when it
decodes control channel data. However, we recommend you turn SQUELCH
clockwise and leave it set to a point just after the hissing sound stops.
This lets the scanner quickly acquire the data channel.
Programming Trunking Frequencies
You program trunking frequencies just like non-trunked frequencies, except
you must store the appropriate mode (MO, ED, LT) with each frequency.
Notes: You can only store one trunked EDACS and Motorola channel in a bank
You can, however, mix LTR and conventional channels in a bank.
If you are scanning UHF trunking frequencies under the 512 MHz
range using subaudible data and are not using a base Frequency and
offset, lock out all data channels. See "Programming Motorola
Trunking Systems (UHF-Lo)" below and "Locking Out Channels or
Frequencies" in Faxback Doc. # 61682. Turn off the scanner to
remove the lockouts.
If you are programming trunked frequencies for Motorola Type I and
hybrid systems, you must first program the fleet map (see
"Programming Fleet Maps below").
You must store frequencies using the subaudible trunking method in
banks, mode by mode.
Follow these steps to program trunked frequencies.
1. Press PGM and select the bank, then press TRUNK to enter the ID
program mode.
2. Repeatedly press MODE to select LT for EF Johnson, MO for Motorola or
ED for EDACS (GE/Ericsson) system to scan. This sets the talk group ID
decoding method to be used for the bank.
Notes: If you select -- instead of LT, MO, or ED, the scanner does not
scan trunked frequencies. Instead you see:
I000S....._ _
Not trunked
Press mode.
If you programmed a Motorola Type I or hybrid system, see
"Programming Fleet Maps" below.
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" in Faxback Doc. #
61681).
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 frequencies without programming the base and offset frequencies
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 Internet
sources, or locally-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 frequencies in the UHF-Lo
band.
1. Select the bank, then press PGM to enter the program mode.
2. Store the base frequency into channel 00 of the bank you selected,
then store the trunking frequencies 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 frequency) appears.
I000S . . . . . MO
MOT: none
T+ 12.5 kHz
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 "Programming Trunking
Frequencies" above).
Programming Fleet Maps
You must set the fleet map if you want to receive a Motorola 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.
Block 0 size
code. Use 15
for type II.
S-00
5. Enter the size code information supplied with the Type I system
information, referring to the instruction that appears on the display.
If the information was not supplied, try these common fleet maps.
B
L
O Size Code
C
K 1 2 3 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
B
L
O Size Code
C
K 9 10 11 12 13 14 15 16
0 S4 S0 S4 S0 S3 S4 S4 S3
1 S4 S0 S0 S0 S3 S3 S4 S10
2 S0 S0 S0 S0 S11 S10 S4 S10
3 S0 S0 S0 S0 S4 S4 S11 S11
4 S0 S0 S0 S0 S4 S4 S11 S0
5 S0 S0 S0 S0 S0 S4 S0 S0
6 S0 S4 S0 S0 S0 S12 S12 S12
7 S0 S4 S0 S4 S0 - - -
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 if 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 ID's
You can program up to 100 talk group ID's 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.
Storing Talk Group ID's
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 ID's in a bank,
Memory full! appears. Clear some talk group ID's in order to store
new ones (see "Clearing Talk Group ID's" below).
Follow these steps to manually store talk group ID's or to edit a stored
ID.
1. Press PGM.
2. Press TRUNK.
3. To select the bank you want to store the ID to, press FUNC, then /\ or
\/.
4. Press MODE to select LT, MO, or ED.
5. Enter the talk group ID and press ENTER. If necessary, 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, which you wish to
track while scanning. Hold down TRUNK more than 2 seconds. ID hold ON.
appears.
S208S ..D.+ MO
850.6625 MHz
Bank 2 Ch 08
ID hold ON.
To release ID hold, press SCAN or TRUNK.
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" below).
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 lock out from a trunking ID, manually select the ID
memory, and press L/OUT until L disappears.
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 lockout 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 example, you want to use the
bank to store a different set of talk group IDs).
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 transmission opens squelch,
regardless of the current mode.
Closed Mode
|
S005S..D.- FM
146.5000 MHz
Bank 0 Ch 05
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.
When no ID code is programmed into the scanner, it receives the signal in
PL, DPL, LTR, MOT, or ED mode.
Mode Open Closed
PL and DPL Accepts any PL and DPL. Accepts only the PL or DPL
stored in the channel.
MOT/ED/LTR Stops on any transmission. Only stops on transmission
If the ID is stored, displays if the ID is stored.
the text tag. Otherwise dis- Displays the text tag.
plays the talk group ID.
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.
(GLW EB 9/7/00)
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