Vox Operation - Yaesu FT-857D Operating Manual

VOX Operation

The VOX system provides automatic transmit/receive switching based on voice input to the
microphone. With the VOX system enabled, you do not need to press the PTT switch in
order to transmit.
1. Press the [ FUNC ] key momentarily, then rotate the SELECT knob, as needed, until
Multi Function Row "d" [ RPT, REV, VOX ] appears on the display.
2. Press the [ C ]( VOX ) key to activate the VOX circuitry. The "u" icon will appear at the
left side of the "VOX" notation, and the " " icon will appear on the display. .
3. 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).
4. To cancel VOX and return to PTT operation, again press the [ C ]( VOX ) key. The "u"
icon and " " icon will disappear, signifying that the VOX system has been turned off.
5. The VOX Gain may be adjusted, so as to prevent accidental transmitter activation in a
noisy environment. To adjust the VOX Gain:
Ÿ While still in Multi Function Row "d" [ RPT, REV, VOX ] , press and hold in the [ C ]( VOX )
key for one second. This is a "hot key" feature which will instantly recall Menu
Mode No-088 [ VOX GAIN ] .
Ÿ While speaking into the microphone, rotate the DIAL to the point where the transmit-
ter is quickly activated by your voice, without causing background noise to activate
the transmitter.
Ÿ When you have selected the optimum setting, press and hold in the [ FUNC ] key for
one second to save the new settings and return to normal operation.
6. The "Hang-Time" of the VOX system (the transmit-receive delay after the cessation of
speech) may also be adjusted via the Menu. The default delay is 500 ms. To set a differ-
ent delay time:
Ÿ Press and hold in the [ FUNC ] key for one second to activate the Menu mode.
Ÿ Rotate the SELECT knob to recall Menu Mode No-001 [ EXT MENU ] , then rotate
the DIAL to change the setting to "ON" to enable the extended Menu Mode.
Ÿ Rotate the SELECT knob to select Menu Mode No-087 [ VOX DELAY ] .
Ÿ Rotate the DIAL while saying a brief syllable like "Ah" and listening to the hang
time, so as to set the desired delay.
Ÿ When your adjustments are complete, press and hold in the [ FUNC ] key for one
second to save the new setting and return to normal operation.
The delay time for return to the receive mode is set independently on CW and
voice modes; for CW, use Menu Mode No-024 [CW DELAY] (see next chapter).
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