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schematic

simulate this circuit – Schematic created using CircuitLab

First, I set the output terminal of function generator to 50ohm and output voltage amplitude to 8Vp-p. Then I change the terminal to Hi Z and removed the 50ohm load. Why does the displayed voltage of the function generator became 16Vp-p while the voltage displayed on oscilloscope remain 8Vp-p?

It is a Agilent 33220A function generator and DSO-X 2002A oscilloscope.

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  • \$\begingroup\$ Can you provide screenshots of the scope? \$\endgroup\$ – Curd Nov 2 '15 at 1:58
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We had these in collage years ago, the High Z and 50 Ohm is just software. I can't remember what direction is right but one setting just multiplied or divided the real voltage by a factor of 2.

Trust the scope.

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