User's Manual

the radio - it has no dependencies on other Library elements. In
other words, feel free to import conventional frequencies
individually or as groups without worrying about dependencies.
Trunking talkgroups work differently and can potentially be more
complicated to deal with. A trunking talkgroup is a part of a
trunked radio system - a modern and complicated radio network
that is managed by sophisticated special purpose computers.
Trunking technology allows many different groups of radio users
to share a relatively small number of radio channels. Youʼll know
youʼve browsed to a talkgroup when you see the word
“Talkgroups” on the top line of the display while you are browsing
the library. When browsing the EZ Scan-SDʼs library, everything
you find below the “Systems” level under States or Counties/
Cities will be trunked radio systems and associated sites and
talkgroups. Unlike conventional channels, trunking talkgroups
have dependency - at least one site from the system must be
selected in order for picked talkgroups to imported to Playlists.
There are many different manufacturers and flavors of trunked
radio systems, each with their own special programming
nuances. Fortunately, the EZ Scan-SD takes the guesswork out
of programming talkgroup objects. You simply browse the library
to find what you want to hear, and regardless of whether itʼs a
conventional channel or a trunking talkgroup, most of the time itʼs
as simple as picking the objects you want and importing them to
your desired Playlists.
There is one key difference between trunking talkgroups and
conventional channels. A conventional frequency typically
operates from a single tower or building rooftop site. A few
conventional systems may have more than one site, but they still
use the same frequency, so there are no special considerations
for programming these in the EZ Scan-SD.
On the other hand, trunked radio systems consist of one or more
discrete sites strategically located throughout the service area of
the system to provide the desired level of coverage. Each site
has its own set of frequencies. One type of trunked radio system
technology known as “simulcast” has multiple radio sites that all
operate on the same set of frequencies - to the trunked system,
a simulcast subsystem appears as a single site.
Itʼs important to understand that at least one Site for a system
must be selected when you are importing talkgroups from the
Library to Playlists. Many of the talkgroups you pick will be a part
GENERAL RESEARCH OF ELECTRONICS, INC. PROPRIETARY AND CONFIDENTIAL INFORMATION
EZ Scan-SD Preliminary User Manual" Page 32