PRO-90 300-Channel Trunk Tracker Scanner
(200-0520) Scanning Trunked Systems Faxback Doc. # 45398
Scanning Type 1 and Hybrid Trunked Systems
Your PRO-90 is set to scan Type 11 user IDs by default. When you scan
trunked frequencies, each Type 11 user ID you see appears as an even number
without a dash (such as 2160). Your PRO-90 can also scan Type 1 trunked
systems. Each Type 1 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 1 or hybrid (a com-
bination of Type 1 and Type 2 user IDs) system (see "Types of Trunked Sys-
tems" on Faxback Doc. # 45397).
You might also notice that you are missing responses when you hold on an
active ID. Unlike Type 11 systems, Type 1 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 pro-
gramming a map that is being used in your particular area.
When a Type 1 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 1 sys-
tem, 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.
Size Fleets Subfleets IDs Block
Used
S-O Reserved block for Type 11 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
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 1 system designer depends 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 1 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: 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 SRCH. 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 pro-
grammed, 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 1 or Hybrid 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" below).
E1P1 E1P2 E1P3
Block Size Block Size Block Size
Code Code Code
0 S11 0 S4 0 S4
1 S11 1 S4 1 S4
2 S11 2 S4 2 S4
3 S11 3 S4 3 S4
4 S11 4 S4 4 S4
5 S11 5 S4 5 S4
6 S11 6 S4 6 S12
7 S11 7 S4 7 ---
E1P4 E1P5 E1P6
Block Size Block Size Block Size
Code Code Code
0 S12 0 S4 0 S3
1 --- 1 S4 1 S10
2 S4 2 S12 2 S4
3 S4 3 --- 3 S4
4 S4 4 S4 4 S12
5 S4 5 S4 5 ---
6 S4 6 S4 6 S12
7 S4 7 S4 7 ---
E1P7 E1P8 E1P9
Block Size Block Size Block Size
Code Code Code
0 S10 0 S1 0 S4
1 S10 1 S1 1 S4
2 S11 2 S2 2 S0
3 S4 3 S2 3 S0
4 S4 4 S3 4 S0
5 S4 5 S3 5 S0
6 S4 6 S4 6 S0
7 S4 7 S4 7 S0
E1P10 E1P11 E1P12
Block Size Block Size Block Size
Code Code Code
0 S0 0 S4 0 S0
1 S0 1 S0 1 S0
2 S0 2 S0 2 S0
3 S0 3 S0 3 S0
4 S0 4 S0 4 S0
5 S0 5 S0 5 S0
6 S4 6 S0 6 S0
7 S4 7 S0 7 S4
E1P13 E1P14 E1P15
Block Size Block Size Block Size
Code Code Code
0 S3 0 S4 0 S4
1 S3 1 S3 1 S4
2 S11 2 S10 2 S4
3 S4 3 S4 3 S11
4 S4 4 S4 4 S11
5 S0 5 S4 5 S0
6 S0 6 S12 6 S12
7 S0 7 --- 7 ---
E1P16
Block Size
Code
0 S3
1 S10
2 S10
3 S11
4 S0
5 S0
6 S12
7 ---
Selecting a Preset Fleet Map
1. Select the bank where you want to store the preset fleet map by press-
ing a number key.
2. Press DATA.
3. Repeatedly press /\ or \/ to select E1, then press DATA again.
4. Repeatedly press /\ or \/ to select the name of the map you want
(such as P7), then press E.
The scanner then searches for transmissions using the preset map you chose.
NOTE: When the scanner searches for transmissions, you see Type 1 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. Select the bank where you want to program the fleet map by pressing a
number key.
2. Press DATA.
3. Repeatedly press /\ or \/ until E1 appears, then press DATA.
4. Repeatedly press /\ or \/ until USr appears.
5. 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 SRCH. 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 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 programming 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 assign 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 1 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 S-0 in Step 6.
(LB/EB 11/14/97)
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