Frequency-Domain Measurements Express VIs

LabView Acquire Signals Express VIs

Frequency-Domain Measurements Express VIs

Owning Palette: Analysis Express VIs

Use the Frequency-Domain Measurements Express VIs to perform signal analysis that require the data to be converted into frequency domain. The Frequency-Domain Measurements VIs perform frequency domain transformations and frequency domain analysis.

If a LabVIEW SignalExpress palette is empty or appears to be missing VIs, you are missing components that are not installed by LabVIEW SignalExpress. Reinstall the National Instruments Device Drivers DVD and include NI-DAQmx™ and Modular Instruments support.

The VIs on this palette can return general LabVIEW error codes.

Palette ObjectDescription
DistortionPerforms harmonic distortion analysis and/or SINAD measurement on the input signal.
Frequency ResponseComputes the frequency response and the coherence based on the stimulus and response input signals and returns the results as magnitude, phase, and coherence.
Power SpectrumComputes the averaged magnitude spectrum, power spectrum, or power spectral density for a single or multiple channels. This step can return the spectra in root-mean-square, peak, and peak-to-peak units.
Tone ExtractionFinds the single tone with the highest amplitude or searches a frequency range you specify to find the single tone with the highest amplitude and returns the frequency, amplitude, and absolute phase for the detected tone. The step also can export Export signals to the Project View.