Vertex Standard VX-451 Operating Manual page 20

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
t h e r i g h t s i d e o f t h e
transceiver, then align
t h e c o n n e c t o r o f t h e
Speaker/Microphone
18
o
peratIon
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 transceiver's 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.
VX-450 S O M
erieS perating anual