On my radio there are separate level and parameter settings for both Mic/voice and Data port inputs plus an additional setting that controls whether VOX is monitoring the Data line or the Mic input - and they are not all grouped together in the same place as one might expect. You will activate and deactivate VOX from your radio's front panel VOX control.Ĭlick to expand.If VOX on your FAt-991 is anything at all like my FT-950 (I have not downloaded and read your manual) then the VOX settings, including the choice of input source, can be found buried in the setup menu settings. If using VOX mode, be aware that some Yaesu radios have separate VOX configuration settings for the DATA and the MIC ports, and that you may need to tell the radio which of those two ports (Data or Mic) it should be monitoring so that VOX is looking at the correct input source - if turning VOX on causes the radio to transmit on your voice, rather Than your data signal, then you'll know that the radio is monitoring the wrong VOX input. If your application does not support a compatible means of activating the PTT line directly, for your radio, then you will have to setup your radio to use VOX mode instead so that the radio itself responds automatically to audio input without the need to trigger the PTT line. You do not state which JT-65 application you are using (there are several common candidates) nor precisely how you have interfaced everything to the PC (other than mention if a USB cable), but if you wish to use automatic activation of the PTT line then you will first have to tell the application, from its configuration panel, how to activate your radio's PTT line as there are a number if different ways this can be done for various radios (such as via CAT, via switching either RTS or DTR on a virtual serial port, etc.). I don't have a 991, so this is somewhat generic information.
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