Radio Shack PRO-2055 User Manual page 27

The Basics
the talk group ID on the bottom line of the display.
In the closed mode, the scanner only stops on the
transmission if the LTR data matches a talk group ID
that you have stored in the bank's talk group ID list and
have not locked out.
LTR systems are frequently programmed so that each
radio has a unique ID code.
open and closed modes
You can set your scanner to change the way it receives
signals. These settings, called open mode and closed
mode, affect how the scanner receives signals from
communications systems that use some type of closed
squelch (such as Motorola, EDACS, and LTR systems).
In open mode, you hear all active talk groups
Note Note
except those you specifi cally exclude, making it
easy to hear everything going on. In closed mode,
you hear only those talk groups you specify. This
makes it easy to listen only to talk groups you are
interested in and exclude others.
When you select a system voice channel manually,
any transmission opens squelch, regardless of the
current mode.
When no ID code is programmed into the
scanner, it receives the signal in MO, ED, or LT
mode. In open mode, the scanner stops on any
transmission. If the ID is stored, the text tag
appears on the display. Otherwise, the talk group
ID appears on the display. In closed mode, the
scanner only stops on a transmission if the ID is
stored.
You can set each of the scanner's channel storage
banks to open or closed mode.
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