Type I And Hybrid Trunked Systems - Radio Shack 20-162 User Manual

Trunk Scanning
• For Motorola UHF system use 12.5kHz
spacing between 12.5kHz – 100kHz.
• For Motorola VHF system use 5kHz spacing
between 5kHz – 100kHz.
10. Press CL to return to the Custom Range menu
and repeat steps 5-9 for the other ranges.

Type I and Hybrid Trunked Systems

Your scanner is preset to scan Type II system IDs.
When you scan trunked frequencies, each Type
II user ID you see appears as an even number
without a dash (example 2160). Your scanner 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 (example 200-14).
If you notice a mix of odd- and even-user IDs
(examples 6477, 2160, 6481, 6144, and 1167), then
you are probably monitoring either a Type I or
hybrid (a combination of Type I and Type II user
IDs) system with the S-Bit function turned off (see
"Setting the Status Bit Feature (S-Bit)" on p. 65).
Subfleet information is included with the frequency
list for a Type I system. To enter a provided map,
see "Selecting a Preset Fleet Map" below.
Note: To locate suitable fleet map
information, review the contents of
website www.radioreference.com.
If you do not already know the size codes used,
you will have to guess. Since you do not have to
figure out all the blocks at one time, this is not as
hard as it might seem.
Select a size code for a block, then press SCAN
and listen to the conversations. If you are
receiving most of the replies, then you have
probably selected the right size code and can
program the next block of the map. There are 16
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