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Fldigi Transmit Attenuation Setting

Ron K2RAS
Ron K2RAS Member ✭✭
edited March 2017 in SmartSDR for Windows
I recently noticed the Fldigi Transmit Attenuation adjustment (at the bottom of the Fldigi window).  Are there any recommendations on how this should be set for a Flex 6000?

Thanks, Ron
K2RAS

Answers

  • Tim - W4TME
    Tim - W4TME Administrator, FlexRadio Employee admin
    edited March 2017
    Set it so that you do not overdrive the audio input radio.

    Fldigi puts out a 0 dB level signal when there is no attenuation.  This is too hot for some audio interfaces, but not DAX (the default setting of 50 with a 0 dB input signal will generate 100W when the PA drive is set to 100), as you have plenty of headroom in DAX to accommodate a wide range of audio input levels.

    Use the default settings, don't overdrive the input (-5 dB on peaks is good) and set your power level appropriate for the digital mode you are operating.

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