Date:   1/9/2013 10:09:26 AM ( 12 y ago)
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URL:   https://www.curezone.org/forums/fm.asp?i=2023807

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Just saw this, and (gasp) I have some comments. But first I want to confirm some things. I have to ask this first because there is nothing on the page that ties together positive, negative, output, ground, red, and green to present a comprehensive picture of the test setup. (tks).

1. Green wire is the signal generator circuit return (ground).

2. Red wire is the circuit (555?) output.

3. Scope ground is connected to the green wire at the contact point (paddle, footpad, etc.). This is a direct copper connection between the scope probe return and the signal generator return.

If these are all correct, then I think your interpretation of the results is in error in two ways, the reasons for overall amplitude changes with location and the significance of the differences in frequency response.

ak

 

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