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DAX control panel - TX gain setting when operating FT8

W8QB
W8QB Member ✭✭
edited January 2020 in FLEX-6000 Signature Series
On FT8 and other digital modes the DAX control panel's TX gain slider can be set anywhere between 0-100.  Where should the TX slider be set for optimal results?

Answers

  • KY6LA_Howard
    KY6LA_Howard Member ✭✭✭
    edited May 2018
    Set it so that the Mike Meter does not peak into red
  • W8QB
    W8QB Member ✭✭
    edited April 2019
    Thanks Howard!
  • Steven WA8Y
    Steven WA8Y Member ✭✭
    edited December 2019
    Yes, keep microphone peak meter from reaching the red (0dB). I set the processor to DX. Now the Flex is using CESSB which all but guarantees you won't splatter ( and a 2.5dB gain in your signal helps keep TX power lower).
  • Ted VE3TRQ
    Ted VE3TRQ Member ✭✭✭
    edited May 2018
    Digital modes should not use any processing at all, so only use DX setting with phone, and always set audio input gain to prevent clipping and distortion no matter the mode.
  • John - AI4FR
    John - AI4FR Member ✭✭
    edited May 2018
    Agree. Under mode I use DIGU which I believe also disables the processor and the EQ.
  • KY6LA_Howard
    KY6LA_Howard Member ✭✭✭
    edited May 2018

    Definitely use DIGU

    That automatically disables EQ and Compression

    Never use any form of EQ or Compression with Digital Modes

  • Tim - W4TME
    Tim - W4TME Administrator, FlexRadio Employee admin
    edited May 2018
    Actually, it is best to peak about -3 dB so you have some headroom on crowded bands with lots of signals (or Howard running 15KW)
  • Tim - W4TME
    Tim - W4TME Administrator, FlexRadio Employee admin
    edited May 2018
    Digital modes do NOT use any audio signal processing.

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