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CESSB

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Mark Smith - KB5KYX
Mark Smith - KB5KYX Member ✭✭
edited January 2020 in FLEX-6000 Signature Series
I'm running a 2 tone test on my CESSB waveform, and once the compression meter gets over ~6db (there is no true scale on this meter so its an estimate) the waveform begins to flatten. The microphone drive is far below 0db. Increasing the compression past this point continues to increase the distorting of the waveform, and I assume is adding distortion to the audio. I thought that the whole idea of CESSB was to prevent this from occurring? What am I missing?

Answers

  • Gary NC3Z
    Gary NC3Z Member ✭✭✭
    edited January 2020
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    And unfortunately once you get below -10dB of mic gain your signal drops off tremendously. It has been tough to find, or keep the drive right at the hairy edge of not causing too much distortion and having the drive drop off a lot.
  • Larry Benoit
    Larry Benoit Member ✭✭
    edited January 2020
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    Hi Mark, 

    FYI, this technical article in QEX (ARRL) provides a detailed explanation of CESSB, though it doesn't discuss Flex Radio's specific implementation of the technology...
    http://www.arrl.org/files/file/QEX_Next_Issue/2014/Nov-Dec_2014/Hershberger_QEX_11_14.pdf

    73,
    Larry KB1VFU


  • Bill -VA3WTB
    Bill -VA3WTB Member ✭✭✭
    edited January 2020
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    By doing a search on the community there is lots of reading on this topic.

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