Vox (Voice-Operated Transmission) - Kenwood TH-D74A User Manual

VOX (VOICE-OPERATED TRANSMISSION)

VOX eliminates the necessity of manually switching to
Transmit mode each time you want to transmit.
The transceiver automatically switches to Transmit mode
when the VOX circuitry senses that you have begun speaking
into the microphone.
When you operate the VOX function, you must use an
optional Headset; the internal speaker and microphone are
too close to each other to be used for the VOX function.
VOX On/ Off
1 Access Menu No. 150.
2 Select [On].
When VOX is activated, the gain level, and delay
•
time will appear on the display.
Note:
◆ While in Menu mode, the VOX function is temporarily disabled.
◆ Since the VOX circuit must detect the presence of your voice,
you may notice a slight delay in transmission; the very first part
of your message may not be transmitted.
◆ When the VOX function is ON, the ASC function turns OFF.
◆ VOX cannot be used with an optional Speaker/ Microphone.
VOX Gain
To enjoy the VOX function, take the time to properly adjust the
VOX Gain level. This level controls the VOX circuit to detect
the presence or absence of your voice.
There are 2 ways to adjust the VOX Gain.
While the VOX function is ON:
1 Speak into the headset microphone using your normal
tone of voice to transmit.
2 Adjust the VOX Gain by pressing [
transceiver reliably switches to transmission mode each
time you speak while the transceiver is transmitting.
]/[ ] until the
12-5
From the Menu:
1 Access Menu No. 151.
2 Select the desired VOX gain level.
VOX Delay Time
If the transceiver returns to reception mode too quickly after
you stop speaking, the end of your transmission may not
be sent. To avoid this, select an appropriate delay time that
allows your entire transmission to be sent, before Transmit
mode ends. However, do not make the delay overly long.
There are 2 ways to adjust the VOX Delay Time.
While the VOX function is ON:
1 Press [ ]/[ ] to change the delay time to 250, 500, 750,
1000, 1500, 2000, or 3000 ms.
From the Menu:
1 Access Menu No. 152.
2 Select [250], [500], [750], [1000], [1500], [2000], or [3000]
ms.
Note:
◆ If you press [PTT] while the VOX function is ON, the VOX Delay
Time is not reflected to the transmission.
◆ If you press [CALL] (if 1750 Hz is programmed) to transmit a
1750 Hz tone, the VOX Delay Time is not reflected.
◆ If the DCS function is ON, the transceiver remains in Transmit
mode for the duration set by the VOX Delay Time. It then sends
a Turn-Off Code to close the receiving party's squelch.