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Owning Palette: Sound and Vibration VIs

Use the Frequency Analysis VIs to perform averaged and non-averaged, or single block, frequency analysis. The analysis is based on the FFT.

The VIs on this palette can return ranges of LabVIEW error codes or specific sound and vibration error codes, or specific waveform error codes.

Refer to the examples\Sound and Vibration directory for examples of using the Frequency Analysis VIs.

Palette Object	Description
Frequency Response	Computes the frequency response and the coherence based on the stimulus and response input signals and returns the results as magnitude, phase, and coherence.
Limit Test (Frequency Domain)	Compares an input signal to user-specified limits and returns information on whether the test passed or failed, and where it failed. The step accepts time-domain signals, frequency-domain signals, and scalar values as input. You can specify the limits as signals or as scalar values. You also can specify user-defined limits. In LabVIEW SignalExpress, other steps can create limits.
Limit Test (Scalar)	Compares an input signal to user-specified limits and returns information on whether the test passed or failed, and where it failed. The step accepts time-domain signals, frequency-domain signals, and scalar values as input. You can specify the limits as signals or as scalar values. You also can specify user-defined limits. In LabVIEW SignalExpress, other steps can create limits.
Limit Test (Time Domain)	Compares an input signal to user-specified limits and returns information on whether the test passed or failed, and where it failed. The step accepts time-domain signals, frequency-domain signals, and scalar values as input. You can specify the limits as signals or as scalar values. You also can specify user-defined limits. In LabVIEW SignalExpress, other steps can create limits.
Peak Search	Performs a peak search in the frequency domain. You can detect a single or multiple peaks in a magnitude spectrum or power spectrum. You can specify the magnitude threshold and frequency range to fine-tune the peak search.
Power in Band	Computes the total power in the range of interest for power, power spectral density (PSD), and magnitude spectra.
Power Spectrum	Computes the averaged magnitude spectrum, power spectrum, or power spectral density for a single or N channels. This step can return the spectra in root-mean-square, peak, and peak-to-peak units.
Zoom Power Spectrum	Computes the averaged zoom magnitude spectrum or zoom power spectrum. This measurement can return the spectrum in root-mean-square, peak, and peak-to-peak units. Data is accumulated each time you pass new data. However, zoom analysis returns a new spectrum only when sufficient data has been accumulated.

Subpalette	Description
Baseband FFT VIs	Use the Baseband FFT VIs to perform baseband FFT measurements.
Spectrum Extended Measurements VIs	Use the Spectrum Extended Measurements VIs to perform advanced frequency analysis measurements.
Zoom FFT VIs	Use the Zoom FFT VIs to perform zoom FFT measurements.