HP105/HP405 User manual
Page. 14
Handsfree transmission (VOX)
VOX (Voice Operated eXchange) is an automatic system which allows you to automatically switch the
transmission in hands free mode just by speaking in the built-in microphone of an headset (not provided
with the unit). Please ensure that the handset is suitable for your transceiver as reported in the paragraph
“Microphone connection”. To insert the VOX and adjust sensitivity:
1) Switch on the radio keeping pressed the
FUNC
key.
2) Connect the optional headset with built-in microphone to the microphone connector located on the
transceiver’s side.
10) Ensure that the headset’s built-in microphone is located close to the side of your mouth.
11) Hold the
FUNC
key for more than 2 seconds to toggle VOX sensitivity from HIGH to LOW and vice
versa. Adjust the VOX sensitivity in order to ensure a stable transmission when speaking with a normal
voice level.
"
We recommend to set the just minimum sensitivity as possible. A too high value could cause
accidental transmissions, especially in hi-noise environments.
!
PTT button is disabled during VOX.
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