[Elecraft] Notch filter question

[Lyle Johnson]

> ...In using  
> the Notch filter (NTCH), 'auto' worked fine, except when the offending  
> signal was below about 1500Hz.  In order to remove whatever the signal  
> was below that threshold, I had to go to 'manual' mode.  I could find  
> nothing about this in the documentation.

The autonotch works with very low pitches.

The weaker the signal being notched, the longer it takes to find an 
eliminate it. If the signal is in the noise, it might not be detected by 
the autnotch algorithm.

73,

Lyle KK7P