Welcome to the FlexRadio Community! Please review the new Community Rules and other important new Community information on the Message Board.
Need the latest SmartSDR or 4O3A Genius Product Software?

SmartSDR v4.1.3 and the SmartSDR v4.1.3 Release Notes
SmartSDR v3.10.15 and the SmartSDR v3.10.15 Release Notes

The latest 4O3A Genius Product Software and Firmware
If you are having a problem, please refer to the product documentation or check the Help Center for known solutions.
Need technical support from FlexRadio? It's as simple as Creating a HelpDesk ticket.

Rounded TX spikes in FT8 mode

picture
picture Member ✭✭
edited September 2019 in DAX
When transmitting FT8, I see momentary rounded peaks on the scope.  It happens 2 or 3 times during a transmission.  I have restarted DAX, the problem persist.  I am wondering if these are being caused by RF getting into the system, or another issue. 

Answers

  • Erika - KØDD
    Erika - KØDD Member ✭✭✭
    edited September 2019
    Try turning down the TX Gain In your DAX TX Stream, That peak line needs to stay down a ways from the top the average around 10 on the SSDR Level indicator.  no red to the radios level.

    Weird stuff starts happening if the gain is too high.  That's one idea.  There's two spots in the FT8 exchange where if this was RTTY I'd think there were a CR-LF, Only those who programmed FT8 know what its doing.  Almost sounds like a crackle to my ear when its doing that.

    There's a sweet spot with the gain.  If its too low, you won't get answers often enough.  If its too high you won't get answers at all.  TRy changing your aftershave, I have a special FT8 perfume that draws em in like magic.  Good Morning...  :-)  Erika DD
  • picture
    picture Member ✭✭
    edited September 2019
    Well done Erika!  That was what it took.  TNX. 
  • Erika - KØDD
    Erika - KØDD Member ✭✭✭
    edited September 2019
    That's wonderful...  Glad to hear that.  Erika DD

Leave a Comment

Rich Text Editor. To edit a paragraph's style, hit tab to get to the paragraph menu. From there you will be able to pick one style. Nothing defaults to paragraph. An inline formatting menu will show up when you select text. Hit tab to get into that menu. Some elements, such as rich link embeds, images, loading indicators, and error messages may get inserted into the editor. You may navigate to these using the arrow keys inside of the editor and delete them with the delete or backspace key.

Comment As ...

Categories