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In Reply to: RE: 6.3VAC thru hipass filter to "reveal"/emphasize noise and junk... posted by Steve O on December 10, 2017 at 08:30:15:
the first two pictures are shown in relation to each other and I agree the absolute numbers do not matter. The third one is an ugly waveform but more info on how you got that info and the time scale would be helpful. You say you high passed the signal but is that just the remnants of the 60hz left showing all the artifacts that remain?
Showing this with the original waveform on the same scales for reference like you did for the first one would be a good way to show the relationship.
I find this similar to zooming in on the frequency sweeps of a circuit. Here is the frequency response of a simmed LCR phono stage.
Of course I used the oldest trick in the marketing book to make it look Ruler flat. Now take the same info and show it in a more revealing light and dear god we have one of the most nonlinear circuits ever seen.
The second you peek a little more to the right in the plot it suddenly becomes clear that the variation is only +- 0.1dB and the world is a safe place again.
I guess this was just a long way to make my point that an ugly picture doesn't reaally tell us anything unless all of the surrounding data is documented with it.
dave
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Follow Ups
- RE: 6.3VAC thru hipass filter to "reveal"/emphasize noise and junk... - dave slagle 07:37:30 12/11/17 (1)
- RE: 6.3VAC thru hipass filter to "reveal"/emphasize noise and junk... - Steve O 12:42:07 12/11/17 (0)
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