ANF Causing SSB Audio Distortion

  • 3
  • Problem
  • Updated 4 years ago
  • Acknowledged
I looked for previous messages and did not see this mentioned specifically.  

When enabling the ANF (Auto Notch Filter) on the DSP menu (not to be confused with the TNF or Tracking Notch Filter), SSB audio becomes fuzzy and/or distorted as the gain is increased on the ANF slider control.  

From a subjective standpoint, the ANF does not appear to be as effective in removing offending carrier tones in SmartSDR as PowerSDR did on my old Flex 3000.

Are there any recommendations on how to best utilize this feature or work around the distortion while still mitigating offending carrier tones?  Is this a known issue?  Are there any plans to enhance the ANF feature?


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Jay -- N0FB, Elmer

  • 539 Posts
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Posted 5 years ago

  • 3
Photo of Tim - W4TME

Tim - W4TME, Customer Experience Manager

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Official Response
This behavior has been reported previously in the Community and we have acknowledged it.  We are aware of the issues and will be working on the DSP noise mitigation features in an upcoming release.