Holding scope probes causes notable changes, why?

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i playing oscilloscope , noticed if touched 1 lead finger, turn sine wave, , if touched other probe dampen noise @ all. , no fingers kind of giving garbage in between 2 scenarios described.

i know human body acts antennae , has capacitance; one, both, or neither of these reason behavior seeing?

quote from: wes000000 on jun 01, 2014, 04:08 am

i playing oscilloscope , noticed if touched 1 lead finger, turn sine wave, , if touched other probe dampen noise @ all. , no fingers kind of giving garbage in between 2 scenarios described.

i know human body acts antennae , has capacitance; one, both, or neither of these reason behavior seeing?


scopes typically have high input impedence (unless have type 50 ohm switchable input impedence). means takes little current make appreciable change. since body acts antenna, picking stray power line noise (50 or 60hz depending on country multiples there of due distortion products). bit confused other probe mean ground clip or mean probe other channel?


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