Is the Anti-Distortion Test Fixture Found in the NI 5668R Calibration Procedure an Orderable Part?

Updated Jan 24, 2018

Reported In


  • PXIe-5668


  • Calibration Executive
  • LabVIEW Professional

Issue Details

The PXIe-5668 Calibration Procedure recommends an anti-distortion test fixture for verifying third-order intermodulation distortion, second harmonic intercept, and gain compression.  This fixture has a model number of NI 538381A-01, but I can't find the product on the NI site.  Can I purchase this part or do I need to build it myself?


The Anti-distortion test fixture is not a part that National Instruments manufactures.  Page 62 of the PXIe-5668 Calibration Procedure provides the necessary specifications to develop the fixture yourself.  Note that the fixture requires an external +15V/75 W supply and USB interface.  If you need help programming the power supply, contact NI support.


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