Incorrect Pulse Width Generated with NI SMU in LabVIEW

Updated May 3, 2018

Reported In

Hardware

  • PXI-4132
  • PXIe-4137
  • PXI Source Measure Unit

Issue Details

  • I am generating a pulse using a Source Measurement Unit (SMU)  but the pulse width I measure is consistently larger than what I have configured it to be.

Solution

Ensure that the Measure When SMU property is set to On Demand. This can be done using a niDCPower property node and selecting Measurement >> Advanced >> Measure When.

Additional Information

If the Measure When property is not set then the default value will be Automatically after Source Complete.This will cause the SMU to acquire a measurement after each SMU source complete event, which causes the pulse generation to last slightly longer than the intended value.

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