Oscilloscope Readings Are Half Than Generated Signal

Updated Jan 7, 2019

Reported In

Hardware

  • PXIe-5171

Issue Details

When reading data from an PXI Oscilloscope the data are exactly half than the values from a functional generator.

Solution

  • Check the input impedance of the oscilloscope and output impedance of a functional generator.
  • Check impedance compensation on a functional generator.

Additional Information

If you have 50Ω input impedance and 50Ω load impedance the readings on a oscilloscope are half because these impedances acts as 1:1 voltage divider.

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