Automatic Tx/Rx Switching Using Voice Control (Vox) - Yaesu FT-450 Operation Manual

SSB/AM M
A
UTOMATIC
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.
1. Press the [ F ] button followed by the [ VOX/STO ]
button to engage the VOX operation.
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).
3. To exit from VOX operation, press the [ F ] button
followed by the [ VOX/STO ] button again.
VOX G A
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 "
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 "
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 [ HOME/RCL ] button to reset the VOX
gain level to the factory default.
VOX D A
1. Press and hold the [ F ] button for one second to
enter the Menu mode. The "
pear on the display.
2. Rotate the [ DSP/SEL ] knob to select the menu
item "EXT MNU".
3. Press the [ DSP/SEL ] knob to enable adjustment of
this menu item. The "
4. Rotate the [ DSP/SEL ] knob to select "ON" to ex-
pand the menu items.
5. Press the [ DSP/SEL ] knob. The "
turns to appear continuously.
6. Press and hold the [ F ] button for one second to save
the new setting and return to normal operation.
7. Press and hold the [ F ] button for one second to
enter the Menu mode again. The "
will appear on the display.
8. Rotate the [ DSP/SEL ] knob to select the menu
item "VOX DLY".
9. Press the [ DSP/SEL ] knob to enable adjustment of
this menu item. The "
FT-450 O
TX/RX S
WITCHING USING
" icon will ap-
" icon will be blinking.
-
" icon will ap-
" icon will be blinking.
" icon re-
" icon
" icon will be blinking.
M
T
ODE RANSMISSION
V C
OICE ONTROL
[ DSP/SEL ] knob
5. Press the [ DSP/SEL ] knob. The "
turns to appear continuously.
6. Press and hold the [ F ] button for one second to save
the new setting and return to normal operation.
[ DSP/SEL ] knob
10. 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 [ HOME/RCL ] button to reset the VOX
delay time to the factory default.
11. Press the [ DSP/SEL ] knob. The "
returns to appear continuously.
12. Press and hold the [ F ] button for one second to save
the new setting and return to normal operation.
( VOX )
[ VOX/STO ] button
[ F ] button
[ HOME/RCL ] button
[ F ] button
" icon re-
[ HOME/RCL ] button
[ F ] button
"" icon
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