Radio Shack PRO-93 - Manual (Page 5)

5 Features
ˆ
Features
Your RadioShack Handheld Scanner is one of a new
generation of scanners designed to track Motorola

Type I and II (such as Smartnet

and Privacy Plus

)
and hybrid analog trunking systems, and GE/Ericsson
(EDACS

) type systems, which are extensively used in
many communication systems.
Trunking communications systems let a large group of 2-
way radio users (or even different groups of 2-way radio
users) efficiently use a set of frequencies. Instead of se-
lecting a specific frequency for a transmission, the user
simply selects a talk group. The trunking system auto-
matically transmits the call on the first available frequen-
cy, and also sends a code that uniquely identifies that
transmission.
Since the trunking system might send a call and its re-
sponse on different frequencies, it is difficult to listen to
trunked communications using a regular scanner. The
trunking scanner monitors the data sent with a 2-way ra-
dio transmission, so you can hear the call and response
for that user and more easily "follow" the conversation.
The scanner also lets you scan conventional transmis-
sions, and is preprogrammed with service search banks
for convenience. By pressing a single button, you can
quickly search those frequencies most commonly used
by public service and other agencies.
This scanner gives you direct access to over 59,000 fre-
quencies including those used by police and fire depart-
ments, ambulance services, government agencies, air,
and amateur radio services.
Your scanner includes these features:
Simultaneous Trunking Operation — tracks two trunk-
ing systems (Motorola and EDACS) and conventional
systems at the same time.
Automatic Channel Programming — automatically de-
termines the group trunking frequencies, for Motorola