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46
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 lis-
ten to the communications. If you decide you are receiv-
ing 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 hy-
brid 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” on Page 49).
E1P1 E1P2 E1P3
Block Size
Code
Block Size
Code
Block Size
Code
0S110S40S4
1S111S41S4
2S112S42S4
3S113S43S4
4S114S44S4
5S115S45S4
6S116S46S12
7S117S47---
E1P4 E1P5 E1P6
Block Size
Code
Block Size
Code
Block Size
Code
0S120S40S3
20-520.fm Page 46 Wednesday, August 4, 1999 3:06 PM