[Elecraft] K3 Noise Blanker Test

[wa9fvp]

While setting up the test I found a strange anomaly.  If the pulse amplitude
went above 260mv, the overall noise floor increased.  I’m not sure why this
happened but I suspect it has something to do with the DSP.

When the NB was engaged, the pulse noise was reduced but the overall noise
floor was still high.  Reducing the pulse amplitude below 250mv P-P, the
noise floor suddenly dropped.  

The pulse width had a large effect on the pulse noise amplitude that was
heard at the speaker but pulse rate had very little effect on the “sweet”
and “Hot” spots.  It's like a car that was accelerating as it passed by your
shack.   The pulse duration would decrease as the car speeds up, but you
wouldn’t hear an amplitude change because the ignition system would yield
the same pulse width.  You would hear the pulse frequency increase as if it
were a higher pitch and the amplitude would decrease as the car moved away.

The question is, what is the pulse width and amplitude of an automobile. 
Does the pulse width change from car to car and electric motor to electric
motor?  How do you accurately simulate that condition?  

-----
Jack WA9FVP
Willco Electronics
--
View this message in context: http://elecraft.365791.n2.nabble.com/K3-Noise-Blanker-Test-tp6848802p6849732.html
Sent from the Elecraft mailing list archive at Nabble.com.