Voice-Controlled Transmit - Vox; Setting Line Level Input Into Acc Connector - XIEGU G90 Operation Manual

Voice-controlled Transmit - VOX

The voice-controlled transmission (VOX) feature can automatically judge
whether there is a hand microphone connected or if audio is coming from the
line input signal (on the ACC socket). It will automatically control the radio
switching between the receive and transmit when audio is detected. When the
VOX function is activated, it is unnecessary to press the hand microphone PTT
key to start the transmission.
After pressing the [FUNC] button to activate the secondary functions of all
buttons, press the volume knob IN and you will enter the VOX function settings.
Rotate the main tuning knob to change values. Press the VOL knob in again to
go through the different settings.
VOX OFF/ ON: VOX function off / on
VOX GAIN: voice control gain setting (recommended setting is 50)
ANTI-VOX: echo suppression settings for the hand microphone in
conjunction with the receiver speaker (recommended setting is 50)
VOX DLY: VOX hang time (default is 0)
■ The VOX voice-controlled TX function can be used with both the hand
microphone and the line input. You can simply connect audio from your PC's
audio output and input lines to the rear ACC connector (or via the CE-19
accessory) and the VOX function will handle switching the radio between TX
and RX automatically without needing to have a transmit "PTT" control line.

Setting Line level Input into ACC connector:

When the AF-IN pin of the ACC interface is used for line input audio, (when
using the U-D or L-D mode) you need to set the appropriate input volume in the
"AUX IN Volume" option in the system menu. Set it at a mid-level value first.
Then watch the TX power output and adjust your incoming audio from the PC.
(using the PC's sound card output volume level control). Remember that for
digital data modes (e.g. FT8) you want to set the radio at about 50% of full
output so as not to overheat the radio or distort the signal. With a good antenna,
10W average output is sufficient for most digital mode communications. Keep a
check on the temperature of the radio when you operate digital modes (and in
general). Your ambient temperature might be 55F (12C) or 105F(40C) and this
has a major effect on heat build-up. If the radio becomes very hot, you'll need
to reduce power and give it time to cool-down. The radio's transmit section is
very conservatively designed, but any radio can suffer from over-temperature
under certain challenging operating conditions, such as the long 100% duty
cycle periods of some digital modes.
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