70
Beyond the Basics
channel memory location number on the third line and
the Motorola ID number on the bottom line.
To listen to the transmission, the mode of the
programmed channel must be the same as that of
the trunking channel (MO, ED, or LT).
When an ID code is received, the ID list for the bank is
searched, and if found, the text name stored for the ID
appears. If not found, scanning resumes immediately
unless the bank is in open trunking mode.
There might be more than one talk group
transmitting at a time in some Motorola trunking
systems. If you set the scanner to manually tune
in Motorola trunking mode, you will hear the
talk group on that channel, but the display will
alternate between all active IDs.
Frequency fl eet map and talk group information
are also widely available on the Internet (for
example, at
www.trunkscanner.com
).
In the past, groups that transmit frequently, such as
police departments, could transmit on only a few
frequencies. This resulted in heavy traffi c and often
required 2-way radio users to wait for a specifi c
frequency to clear before transmitting. Trunked
systems allow more groups of 2-way radio users to
use fewer frequencies. Instead of selecting a specifi c
frequency to transmit on, a trunked system chooses
one of several frequencies when the 2-way radio user
transmits. The system automatically transmits the call
on that frequency, and also sends a code that identifi es
that 2-way radio user’s transmission on a control
channel.
Your scanner lets you easily hear both the call and
response transmissions for that 2-way radio user and
therefore follow the conversation. For EDACS and
Note
Note
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