PRO-2052 1000-Channel Dual Trunking Home Scanner
(200-0432) Trunk Scanning Faxback Doc. # 58688
Your scanner is designed to track transmissions on Motorola Type I, Type
II, GE/Ericsson EDACS, and hybrid analog trunking systems. Remember these
important points when tracking transmissions:
Your scanner monitors Type II systems by default. However, you can
change this if the system in your area is different (see "Types of
Trunking Systems" on this page and "Scanning Type I and Hybrid Trunked
Systems" below for more information).
Your scanner tracks a trunked system or scans frequencies in
conventional mode, but it cannot do both at the same time.
The frequencies for many of the 800 MHz public safety systems are listed
in the separate "National Public Safety Trunked System Frequency Guide"
included with the scanner.
Types Of Trunking Systems
Your trunk scanning scanner can monitor three basic types of systems,
Type I, Type II, and EDACS. Instead of selecting a specific frequency to
transmit on, a trunked system chooses one of several frequencies in a 2
way radio user's talk group when that user presses PTT (push to talk).
Thus, trunking systems allocate a few frequencies among many different
users, but the way Type I and Type II systems do this is slightly
different.
One important distinction between these systems is the amount of data
transmitted by each radio when its PTT button is pressed. In a Type I
system, the radio's talk group ID and its current affiliation (the trunk
system it belongs to) are both transmitted. In a Type II system, only the
radio's talk group ID is transmitted.
Why the difference? In Type I systems, each radio in the trunk group
individually transmits its own affiliation, while the trunk system
maintains a database that determines each radio's affiliation(s) in Type
II systems.
Another difference between the systems is that Type I systems are arranged
in a fleet-subfleet hierarchy. For example, it is possible for a city
using a Type I system to designate four fleets, each with eight subfleets.
The fleets might be the police department, the fire department, the
utilities, and city administration. The police might decide to further
divide its fleet into subfleets such as dispatch, tactical operations,
detectives, north, south, east, and west side patrols, and supervisors.
All the available police radios 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
programming.
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
accommodate fewer users than Type II systems. 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 monitor type II systems, but you can
change to Type I or a hybrid of Type I and Type II systems by selecting a
preprogrammed fleet map or creating a custom fleet map for your area (see
"Scanning Type I and Hybrid Trunked Systems" below).
You do not need to determine the fleet-subfleet hierarchy for Type II
systems 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.
We recommend you set SQUELCH to the center position before selecting a
trunked bank.
Note: Change this setting as necessary 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)
Ericsson EDACS system:
851.0000-868.9875 MHz (in 12.5 kHz steps)
806.0000-823.9375 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)
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. Although you can
store frequencies for more than one trunked system in one of your
scanner's banks, the scanner only scans the frequencies 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. 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
frequencies. To select a bank between 11 and 20, press SHIFT then the
number keys. The scanner displays one of six system types.
3. Use /\ or \/ to select the system type, then press E.
You See Trunk System
E1 Motorola Type II, 800 MHz frequencies.
Ed EDACS frequencies.
E2 - UHF Motorola Type II, UHF frequencies.
E2 - Hi Motorola Type II, VHF frequencies.
E2 - 811 Motorola Type II, 811 MHz frequencies.
E2 - 900 Motorola Type II, 900 MHz frequencies.
4. Use the number keys to enter the trunked system's frequencies, then
press E.
Note: If you entered an invalid frequency, 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 /\ to select the next channel in the bank.
6. Repeat Steps 4 and 5 until all frequencies have been entered.
Scanning A trunked Bank
You can scan one trunked bank at a time. Once you have stored frequencies
for a trunked system in one or more of the 20 available banks, and you are
scanning non-trunked frequencies, 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 programmed
with trunked frequencies flash, and TRUNK and BANK appear.
3. To see all banks programmed with Motorola system frequencies, press
/\. All banks programmed with Motorola system frequencies flash. To
see all blanks programmed with EDACS system frequencies, press /\
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 controls the trunk), SEARCH flashes. When the
scanner finds the data channel, it begins trunk scanning.
If you entered all of the trunk's frequencies, 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 scanning, press TRUNK again.
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. Within a few minutes, you can
usually figure 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 a 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 SEARCH.
Turning Status Bit Ignore On or Off
You can set how your scanner works with status bits (also called S-bits),
letting you control how the scanner interprets 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, status 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
talkgroup 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 a 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
determine 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 transmissions.
Follow these steps to turn status bit ignore on or off.
1. Hold down SCAN until the current status bit ignore setting (ON or OFF)
appears.
2. Press /\ to select ON or \/ to select OFF, then press E.
Identifying a Trunked Frequency
To identify a trunked frequency, press \/ when the scanner stops on a
talkgroup ID. The trunked frequency briefly flashes twice. To show the
frequency longer hold down \/. The scanner beeps, then the trunked
frequency 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 (for example
AFS) and the ID you want to receive is in the other format (for example,
decimal), you can press 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
Agency and the Fleet listing, then press SEARCH. Note the following
examples.
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 - 10 - 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
transmission and a reply. You can program a 5-second delay so the
scanner holds on an ID for 5 seconds to wait for a reply. The scanner
continues to monitor the frequency or 5 seconds 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.
Note: If you consistently miss responses even with trunk scanning scan
delay set, you might need to change the default system type or the
fleet map you are using. See "Scanning Type I and Hybrid Trunked
Systems" below.
Monitoring an Active ID
When the scanner stops on a transmission, 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" below.
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 trunked systems because
signals you cannot listen to (such as water meters, door alarms, traffic
signals, and encrypted 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 and ID while searching, it is also locked out of
the scan list(s). See "Scan Lists" below.
Unlocking a Single ID
1. Hold down L/O until you hear two short beeps.
2. Repeatedly press \/ or /\ 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 previously 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" below.
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
generally monitor how much communication traffic is occurring on a trunked
system.
A bar that remains on steadily even when there are no current
transmissions represents the frequency 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 telephone interconnect call or a private 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 frequencies into a bank (see "Programming Trunked
Frequencies" above), 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).
Scan lists help you organize trunking system users into categories. For
example, 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 program IDs into scan lists manually, during a search, or
automatically.
Manually Storing IDs into Scan Lists
1. Select the desired trunking bank (see "Scanning a Trunked Bank" above)
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 /\ or \/ 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 /\ 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 PRIORITY.
The currently selected scan list memory location flashes.
2. Press E to store the ID in the selected scan list memory location. Or,
repeatedly press /\ or \/ to select another location, then press E.
3. Press SEARCH to resume searching.
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 /\ or \/ to choose a specific scan list location.
3. Press E.
Note: An ID you enter into a scan list location automatically overwrites
any ID that is already stored in that location.
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 /\ or \/ 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 numbers appear at the top of the display.
To remove a scan list from active scanning, use the number keys to enter
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
active.
To restore a scan list to active scanning use the number keys to enter its
number again.
Press SEARCH to return to the previously 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 (or PRI) appears.
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
number without a dash (such as 2160). Your PRO-2052 can also scan Type I
trunked systems. Each type I ID appears 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 probably monitoring either a Type I or a
hybrid (a combination of Type I and Type II user IDs) system, or an
Ericsson EDACS system. (See "Types of Trunking Systems" above.) An EDACS
ID appears as a two-digit number, followed by a three-digit number (such
as 01-011).
You might also notice that you are missing responses when you hold on an
active ID. Unlike Type II systems, Type I, EDACS, and hybrid systems
require a fleet map that sets specific fleet-subfleet parameters. It is
easy to select a fleet map to scan; what is not always easy is selecting
or programming 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
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
S4 has one fleet, which is divided into 16 separate subfleets, and it has
a total of 512 individual IDs.
Block
Size Fleets Subfleets IDs 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 54 1
S8 16 4 128 1
S9 8 4 256 1
S10 4 8 256 1
S11 2 16 256 1
S12 1 16 1024 2
S13 1 16 2048 4
S14 1 16 4096 8
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 hyphen) identifies the subfleet.
The size codes selected by a Type I system designer depend on the specific
needs of the system's 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 system. In other words, you will
hear complete communications while monitoring a trunked system.
Note: www.trunkscanner.com plans to make preset fleet maps available as
they become known.
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 SEARCH. Know 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 hybrid trunk scanning 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" below).
E1P1 E1P2 E1P3 E1P4
Size Size Size Size
Block Code Block Code Block Code Block Code
0 S11 0 S4 0 S4 0 S12
1 S11 1 S4 1 S4 1 S12
2 S11 2 S4 2 S4 2 S4
3 S11 3 S4 3 S4 3 S4
4 S11 4 S4 4 S4 4 S4
5 S11 5 S4 5 S4 5 S4
6 S11 6 S4 6 S12 6 S4
7 S11 7 S4 7 S12 7 S4
E1P5 E1P6 E1P7 E1P8
Size Size Size Size
Block Code Block Code Block Code Block Code
0 S4 0 S3 0 S10 0 S1
1 S4 1 S10 1 S10 1 S1
2 S12 2 S4 2 S11 2 S2
3 S12 3 S4 3 S4 3 S2
4 S4 4 S12 4 S4 4 S3
5 S4 5 S12 5 S4 5 S3
6 S4 6 S12 6 S4 6 S4
7 S4 7 S12 7 S4 7 S4
E1P9 E1P10 E1P11 E1P12
Size Size Size Size
Block Code Block Code Block Code Block Code
0 S4 0 S0 0 S4 0 S0
1 S4 1 S0 1 S0 1 S0
2 S0 2 S0 2 S0 2 S0
3 S0 3 S0 3 S0 3 S0
4 S0 4 S0 4 S0 4 S0
5 S0 5 S0 5 S0 5 S0
6 S0 6 S4 6 S0 6 S0
7 S0 7 S4 7 S0 7 S4
E1P13 E1P14 E1P15 E1P16
Size Size Size Size
Block Code Block Code Block Code Block Code
0 S3 0 S4 0 S4 0 S3
1 S3 1 S3 1 S4 1 S10
2 S11 2 S10 2 S4 2 S10
3 S4 3 S4 3 S11 3 S11
4 S4 4 S4 4 S11 4 S0
5 S0 5 S4 5 S0 5 S0
6 S0 6 S12 6 S12 6 S12
7 S0 7 S12 7 S12 7 S12
Selecting a Preset Fleet Map
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 where you want to store the
preset fleet map.
3. Repeatedly press /\ or \/ to select E1 (Type I and hybrid), then press
E.
4. Press DATA.
5. Repeatedly press /\ or \/ to select the name of the desired map (such
as E1P7), then press E.
The scanner than 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 correct? Listen to see
if you are following complete conversations. If not, try another preset
map.
Programming a Fleet Map
1. Hold down TRUNK until the scanner beeps twice. BANK, TRUNK and the
bank numbers flash.
2. Press a number key to select the bank where you programmed Type I
trunk frequencies.
3. Repeatedly press /\ or \/ until E1 appears, then press E.
____
4. Press DATA.
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5. Repeatedly press /\ or \/ until USr appears, then press DATA.
6. Repeatedly press /\ or \/ to select the size code for the first block,
then press E. The next available block appears.
7. Repeat Step 6 until you have selected a size code for each block you
want to work with.
8. Press SEARCH. The scanner exits the trunking programming mode, tunes
the data channel, then begins to search using the map you programmed.
Note: If you select size code S12, S13, or S14, these restrictions apply:
S12 can only be assigned to Blocks 0, 2, 4, or 6.
S13 can only be assigned to Blocks 0 and 4.
S14 can only be assigned to Block 0.
Since these size codes require multiple blocks, you will be prompted for
the next available block when programming a fleet map. For example, if
you assign Block 0 as an S12, the scanner prompts you for b2, the next
block available, instead of b1. And if you assign Block 0 as an S14, 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" above. However, if you want a
block to be Type II, select size code SO in Step 6.
Programming the Base and Offset Frequencies
To properly track Motorola VHF and UHF trunked systems, you must program
the applicable base and offset frequencies for each system.
These settings can be found at www.trunktracker.com and similar frequency
resources.
1. Set the scanner for conventional scanning, then hold down TRUNK until
the scanner beeps twice.
2. Press the number key of the bank where you want to store the base
frequency.
3. Repeatedly press /\ or \/ to select E2-VHi or E2-UHF, then press E.
____
4. Press DATA. The preset base frequency appears.
5. Enter a desired frequency.
____
6. Press DATA. The preset offset frequency appears.
7. Enter the frequency using the number keys according to the following
guide:
For Motorola Type II VHF, (E2-VHi band) use 12.5 kHz steps between
12.5 kHz-100 kHz.
For Motorola Type II UHF, (E2-UHF band) use 5 kHz steps between
5 kHz-100 kHz.
Note: For example, if you program 406.0250 as a trunked frequency, the
base and offset frequencies are as follows:
BASE: 406.0000 MHz, OFFSET: 12.5 kHz = Channel 2.
BASE: 406.0000 MHz, OFFSET: 25.0 kHz = Channel 1.
8. Repeat the steps under "Programming Trunked Frequencies" above to
store the trunked system's frequencies in your scanner's banks.
Turning the Motorola Disconnect Tone Detect Function On/Off
While trunk scanning a Motorola system, your scanner automatically tunes
to the data channel when it detects a disconnect tone (a code that tells
the trunking system that the transmitter has finished sending) on the
voice channel.
You can manually turn off this function so the scanner does not tune to
the data channel under those conditions. Use this feature to listen to
weak transmissions when conversations are generally disconnected.
To turn the disconnect tone detect function off, set the scanner to trunk
track then press SVC. ____
The scanner beeps and DATA flashes for about 5 seconds.
Notes: To set the scanner so it remains on the voice channel (even when a
disconnect tone is transmitted or there is no signal at all) set
SQUELCH so you hear a hissing noise.
You cannot use the disconnect tone detect function if you are
programming a trunking frequency or a fleet map.
To set the scanner to automatically tune to the data channel once again
when it detects a disconnect tone, press SVC.
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DATA disappears.
(BR EB 2/23/00)
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