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Trunking
56
specific 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 identifies 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
Motorola (above 406 MHz range),
the scanner monitors the control
channel between each
transmission to identify talk groups.
SETTING SQUELCH FOR
THE TRUNKING MODE
Your scanner automatically mutes
the audio during trunk scanning
when it decodes control channel
data. However, we recommend
you turn
SQUELCH clockwise and
leave it set to a point just after the
hissing sound stops. This lets the
scanner quickly acquire the data
channel.
PROGRAMMING
T
RUNKING FREQUENCIES
You program trunking frequencies
the same as non-trunked
frequencies, except that you must
store the appropriate mode (MOT
or ED) with each frequency.
Ô
Follow these steps to program
trunked frequencies:
Ô NOTE Ô
• You can scan only
one type of
trunkedfrequency
,
either EDACS or
Motorola in a bank
at one time. You
can, however, mix
conventional
channels and
frequencies in a
bank.
• If you are
programming
trunked
frequencies for
Motorola Type I
and hybrid
systems, youmust
first program the
fleet map (see
“Programming
Fleet Maps” on
Page 60).
• If you are
programming
frequencies for an
EDACS system
you must store
them in the
Logical Channel
Number order
(usually listed as
LCN#). For
example, LCN1
would go into
channel 01 for the
current bank, and
LCN2 would go
into channel 02.