Zero hump

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Zero hump

Post by Sam » Tue Aug 10, 2010 4:45 pm

I have just posted a file discussing what I call the "zero hump":

I will probably move this to my web site at some point.

The Zero Hump is the leakage that occurs from 0 Hz and up, but gradually peters out, disappearing completely after a couple of MHz. It can have a surprisingly strong effect on measurements, especially when you are below 1 MHz. It also has some implications for how you do initial calibration, if you are looking for maximum accuracy at low signal levels.

I accidentally discovered a way to view the effects of the Zero Hump leakage on actual input signals, which motivated this document.

Sam W.

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