[Elecraft] K3 - AFSK anamoly? No replies, try again

Don Wilhelm w3fpr at embarqmail.com
Thu Feb 18 19:30:17 EST 2016


Mike,

For strong signals the filtering may let some of the opposite sideband 
get through the filters.
What is the relative S-meter reading for the true sideband and the 
opposite sideband?

73,
Don W3FPR

On 2/18/2016 11:56 AM, Mike Murray wrote:
> After doing some more testing in last weekends RTTY contest, it appears
> that I made an erroneous statement as to what I was hearing and where.
> What I found is that as I tune down in frequency and find a signal that
> will decode, if I then tune down another 170 Hz I'll hear the inverted
> signal.  Still using dual passband DSP filter at 400 Hz and 400 Hz, 8 pole
> roofing filter as before.  I have a brief video on uTube showing the effect
> at:
>
>



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