[hpsdr] Fwd: Horton LO - further thoughts

[Jim Miller]

While we're waiting for adaptive cancellation of big sigs mentioned by Bob 
in the HPSDR presentation it might make sense to make a "tweet reducer" 
knob.

This would be a knob that when turned would move the DDS output frequency 
while moving the software decoder to offset the movement thus keeping the 
same tuned frequency.

The operator upon hearing a interfering signal or signals could turn the 
"tweet reducer" until a quiet spot was realized as a result of moving a spur 
off a mixing signal.

There's no guarantee one could be found on a jammed band but I suspect at 
least in this part of the sunspot cycle it would be worth implementation 
most of the time.

And that would give us two more Analog Devices product cycles to reach new 
lows in the SFDR of their products! ;-)

This could be in combination with the already existing approach of selecting 
"tuned frequencies" which have minimum spurious output.

That's one thing I really like about the way this project is going. You can 
plug in the "next great thing" when it's ready yet enjoy what you've got 
now.

73

jim ab3cv 


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