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VX-450 SerieS Operating Manual
18
operatIon
r
To transmit, monitor the
channel and make sure it
is clear.
Press and hold the
PTT
switch. Speak into the
microphone area of the
front panel grille in a normal voice level. To re-
turn to the Receive mode, release the
PTT
switch.
r
Press the (Orange)
TOP
SEL
key to activate one
of the preprogrammed
functions which may
have been enabled at the
time of programming by
the dealer. See the next section for details regard-
ing the available features.
r
If a Speaker/Microphone
is available, remove the
plastic cap and its two
mounting screws from
the r i g h t sid e o f t he
transceiver, then align
the c o n n e c t o r o f the
Speaker/Microp ho ne
on the transceiver body; secure the connector pin
using the screws supplied with the Speaker/Mi-
crophone. Hold the speaker grille up next to your
ear while receiving. To transmit, press the
PTT
switch on the Speaker/Microphone, just as you
would on the main transceivers body, and speak
into the microphone on a normal voice level.
Note 1): Save the original plastic cap and its
mounting screws. They should be reinstalled
when not using the Speaker/Microphone.
2) When you press the PTT switch on the Speak-
er/Microphone, it disables the internal micro-
phone, and vice versa.
r
If the Busy Channel Lockout feature has been
programmed on a channel, the radio will not
transmit when a carrier is present. Instead, the
radio will generate short beep three times and
indicate
CH BUSY
on the display (
VX-454
and
VX-459
). Release the
PTT
switch and wait for
the channel to be clear of activity.
20


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