Digital Compare

LabVIEW SignalExpress

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Digital Compare

Compares a reference and test signal to determine the number of sample errors.

ParameterDescription
Digital waveform previewDisplays the two waveforms to be compared.
Signal name previewDisplays the signal names associated with the signals in the Digital waveform preview.
Digital preview Y scrollbarScrollbar that allows you to scroll through the Digital waveform preview.
InputContains the following options:
  • Reference waveform—Displays the signal that will serve as the reference for your comparison. Sample errors are produced when the test waveform differs from this waveform.
  • Test waveform—Displays the signal you want to compare to the reference signal. Sample errors are produced when the test waveform differs from the reference waveform.
ConfigurationContains the following options:
  • Comparison Start Position—Contains the following options:
    • Reference waveform start—Specifies the position of the sample where you want to start the signal comparison.
    • Test waveform start—Specifies the position of the sample where you want to start the signal comparison.
  • Compare subset—Specifies whether you want to compare the entire test signal to the reference signal or whether you only want to compare a subset of the samples. Selecting this checkbox means that a subset that is the number of samples specified in Number Samples will be compared, starting at the reference waveform start position you specify.
  • Number of samples—Specifies the number of samples in the subset the VI compares.
  • Passed—Displays the result of the waveform compare. If all specified samples match, the compare passes. Otherwise, the compare fails, and the number of sample errors is returned in Number of Sample Errors.
  • Number of Sample Errors—Returns the number of sample errors in the test signal.
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