Flatten off just shows you what the "real" spectrum looks like.  Flatten tries 
to make it more user-friendly and works well with flat background noise.
But I agree that looks like a notch filter.
Mike

 

    On Monday, March 4, 2019, 7:56:28 AM CST, Bill Mullin <mrb...@aa4m.com> 
wrote:  
 
  Like this:
 
 http://aa4m.com/links/Flatten_Off.jpg
 
 That's definitely not the fix!
 
 73
 
 On 2019-03-04 06:39:47, Black Michael via wsjt-devel wrote:
  
 
  What does it look like with Flatten turned off? 
  de Mike W9MDB 
   
    
  
      On Monday, March 4, 2019, 7:36:18 AM CST, Bill Mullin <mrb...@aa4m.com> 
wrote:  
  
     I have "dead space" running from about 1300 - 1700 on all bands:
 
 http://aa4m.com/links/Problem.jpg
 
 This screen capture shows that this dead space is in the same location on 80, 
40, 30, and 20 meters.  I'm running WSJT-X 2.0.1 and have been since the day it 
came out.  This problem started yesterday, so I don't think it's a glitch in 
the program.  I've probably (accidentally) screwed up a parameter but I have no 
idea which one.  Can anyone help?
 
 73, Bill - AA4M
 
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