Don't Fall Into This Output Impedance Trap!

Function Gen says 1V, Scope says 2V. Which one's right?

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The function generator is set to have a 1 V output, but the oscilloscope measures a 2 Volt signal. Why? When set to 50 ohm mode, the function generator actually outputs double the specified input voltage. It does this because it expects to see a 50 ohm load on the output, creating a 50/50 voltage divider circuit.

Questions or comments? Ask me on Twitter: @DanielBogdanoff https://twitter.com/DanielBogdanoff

Learn more about using oscilloscopes: http://oscilloscopelearningcenter.com

Check out the EEs Talk Tech podcast: https://www.youtube.com/playlist?list=PLzHyxysSubUnAMeCIi2-S0Vm7YtSAGqx_

The digital storage oscilloscope we used: http://www.keysight.com/en/pcx-x205209/infiniivision-4000-x-series-oscilloscopes?cc=US&lc=eng

#oscilloscope #oscilloscopes #electronics #electricalengineering #impedance #impedancematching #50ohm #50ohmimpedance #highimpedance #outputimpedance #functiongenerator ... https://www.youtube.com/watch?v=e446nQ9cXdc