Yaesu FT-450D Manuale Utente
Page 41
FT-450D O
PERATION
M
ANUAL
A
UTOMATIC
TX/RX S
WITCHING
USING
V
OICE
C
ONTROL
(VOX)
Instead of using the microphone’s PTT switch to activate the transmitter, the VOX (Voice Operated TX/RX
Control) system provides hands-free, automatic activation of the transmitter, based on voice input into the mi-
crophone. Setup of the VOX system takes only a few seconds.
Control) system provides hands-free, automatic activation of the transmitter, based on voice input into the mi-
crophone. Setup of the VOX system takes only a few seconds.
SSB/AM M
ODE
T
RANSMISSION
1. Press the [F] button followed by the [STO/VOX]
button to engage the VOX operation.
The “
The “
” icon will appear in the display.
2. Without pressing the PTT switch, speak into the
microphone in a normal voice level.
When you start speaking, the transmitter should
be activated automatically. When you finish
speaking, the transceiver should return to the
receive mode (after a short delay).
When you start speaking, the transmitter should
be activated automatically. When you finish
speaking, the transceiver should return to the
receive mode (after a short delay).
3. To exit from VOX operation, press the [F] button
followed by the [STO/VOX] button again.
[RCL/HOME] button
[F] button
[DSP/SEL] knob
[STO/VOX] button
[F] button
VOX G
AIN
A
DJUSTMENT
Adjust the VOX gain level to prevent accidental transmitter activation in a noisy environment.
1. Press and hold the [F] button for one second to
enter the Menu mode. The “
” icon will ap-
pear on the display.
2. Rotate the [DSP/SEL] knob to select the menu
item “VOXGAIN”.
3. Press the [DSP/SEL] knob to enable adjustment of
this menu item. The “
” icon will be blinking.
4. Rotate the [DSP/SEL] knob to set to the point
where the transmitter is quickly activated by your
voice, without causing background noise to acti-
vate the transmitter. Available selections are 1
through 100 (factory default: 50).
Press the [RCL/HOME] button to reset the VOX
gain level to the factory default.
voice, without causing background noise to acti-
vate the transmitter. Available selections are 1
through 100 (factory default: 50).
Press the [RCL/HOME] button to reset the VOX
gain level to the factory default.
VOX D
ELAY
A
DJUSTMENT
(
THE
TRANSMIT
-
RECEIVE
DELAY
AFTER
THE
CESSATION
OF
SPEECH
)
1. Press and hold the [F] button for one second to
enter the Menu mode again. The “
” icon
will appear on the display.
2. Rotate the [DSP/SEL] knob to select the menu
item “VOX DLY”.
3. Press the [DSP/SEL] knob to enable adjustment of
this menu item. The “
” icon will be blinking.
4. Rotate the [DSP/SEL] knob while saying a brief
syllable like “Ah” and listening to the hang time,
so as to set the desired delay. Available selec-
tions are 100 through 3000 msec (factory default:
500 msec).
Press the [RCL/HOME] button to reset the VOX
delay time to the factory default.
so as to set the desired delay. Available selec-
tions are 100 through 3000 msec (factory default:
500 msec).
Press the [RCL/HOME] button to reset the VOX
delay time to the factory default.
5. Press the [DSP/SEL] knob. The “
”” icon
returns to appear continuously.
6. Press and hold the [F] button for one second to save
the new setting and return to normal operation.
5. Press the [DSP/SEL] knob. The “
” icon re-
turns to appear continuously.
6. Press and hold the [F] button for one second to save
the new setting and return to normal operation.
[RCL/HOME] button
[F] button
[DSP/SEL] knob