How Can I Synchronize SC Express and X Series Cards?

Updated Dec 11, 2017

Reported In


  • NI-DAQmx

Operating System

  • Windows

Issue Details

  • I need to tightly match strain and load measurements, but I'm not sure how to synchronize my SC Express and X Series cards.
  • Are there any examples that I can reference?


LabVIEW ships with an example that demonstrates SC Express and X Series synchronization (as well as a few other combinations).
  • Start LabVIEW
  • Navigate to Help>>Find Examples
  • Navigate to Hardware Input and Output>>DAQmx>>Synchronization>>Analog Input -
  • From the block diagram, select the X Series (PXIe), SC Express tab of the case structure to view the relevant code

Additional Information

  • X Series and SC Express cards have different types of ADCs which can make synchronization more complex. 
    • X Series cards use Successive Approximation Register (SAR) ADCs
    • SC Express cards use Delta Sigma ADCs
  • SC Express cards also usually have additional signal conditioning components such as analog or digital filters which can delay measurements


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