45
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 hyphen)
identifies the subfleet.
The size codes selected by a Type I system designer de-
pend 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
Size
Fleets
Subfleets
IDs
Block
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
20-520.fm Page 45 Wednesday, August 4, 1999 3:06 PM
