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. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
