PRO-90 300-Channel Trunk Tracker Scanner
(200-0520)                 Using This Guide           Faxback Doc. # 45403

This guide contains all known Trunked public safety systems at the time the
guide was printed. States which are not listed do not have any known trunk-
ing public safety systems.  FCC data was the primary source of information
in compiling this publication.  We also relied upon local and on-line re-
ports and can assume no responsibility or liability for accuracy.

Check with your local RadioShack store, radio club, or www.trunkscanner.com
for more information. "Police Call Plus", available at your local RadioShack
store, is also an excellent source of frequency information and is updated
yearly.

Frequency Facts

Trunked radios use repeaters. Users actually transmit on frequencies 45 MHz
below those shown in this section.  All communications are rebroadcast over
the "output" frequency of the repeater pair.  The output frequencies inclu-
ded in this section are all you need to program into your scanner.

Some of the trunked systems shown in this section have been licensed by the
FCC but are not yet on the air.

You might not be able to use your scanner to track some of the systems
listed in this section.  They might be digital (as opposed to standard ana-
log) or they might use computer protocols that your scanner cannot track.
Systems with fewer than 5 channels might be non-trunked.

Sometimes large multi-transmitter site systems will move frequencies around
and even exchange frequencies with neighboring systems to achieve optimum
performance.  You might need to try a combination of frequencies, or check
other radio frequency resources, to find the right plan for your area.
However, this in not normally necessary.

There are a very few large systems that have more than 30 frequencies
licensed but only use a subset of these frequencies for their operations.
The best way to discover which frequencies are used is to put all licensed
frequencies for a particular repeater site in your scanner in the conven-
tional scan mode.  Monitor the channels for 15 to 30 minutes and lock out
the channels that have voice or data activity.

The remaining channels will generally not be a part of the system, although
you might want to check them every so often for activity.

Some large statewide or regional systems contain more than one repeater/
transmitter site with their own data "control" channels.  Try programming
your scanner's banks with these large and small "zonal" type systems to see
which repeater/transmitter sites you can hear.  Generally, there are any-
where from one to a few large cells in urban or suburban areas (wide-area
trunking with simulcast sites) with smaller (fewer frequencies) cells in
outlying areas.  Simulcast systems will show the same frequencies at multi-
ple sites.  You only need to program the frequencies once.

Some public safety systems have been known to use local trunked business
repeater frequencies as an adjunct to their own collection of channels.
Other public safety agencies, generally only on a temporary basis, will
excessively use trunked business systems for their operations.

Large city and county systems generally provide the radio communications
for numerous cities, as well as a variety of county and state agencies.
You'll discover many great IDs!

The Trunked systems listed in this guide appear as:

STATE
LICENSEE (USER) NAME                   TRANSMITTER CITY
Frequencies

(EB 11/14/97)