On 9/23/20 11:26 AM, Jerry Gaffke via groups.io wrote:
I believe that the classic diode RF probe is finding an average voltage of the entire waveform
after first shifting the waveform up such that the bottom tip pretty much sits on the ground reference.
That's significantly different than looking at peak voltage, or peak-to-peak voltage, or rms voltage.
peak voltage, like any capacitor input filter.
In the case of a sine wave, this average voltage is the peak voltage (not the peak-to-peak voltage),
and scaling it down by a factor of 0.707 with the 4.7 meg resistor and an assumed
10 meg (roughly) input resistance will then give the rms voltage.
Just in case anybody wanted to know
Jerry, KE7ER
On Wed, Sep 23, 2020 at 09:22 AM, Jerry Gaffke wrote:
best to just know the RF probe is measuring the peak-to-peak voltage,
