FFT to Spectrum VI

LabVIEW 2018 FPGA Module Help


Edition Date: March 2018
Part Number: 371599P-01
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Owning Palette: Scaling VIs

Requires: FPGA Interface

Converts the output of the Fast Fourier Transform (FFT) Express VI to a power or amplitude spectrum. The spectrum is single-sided and scaled.

real FFT data specifies the real data to convert to the spectrum.
imaginary FFT data specifies the imaginary data to convert to the spectrum.
spectrum type specifies whether the output spectrum is an amplitude or power spectrum. The default is Power (Vrms^2).

0Power (Vrms^2)
1Amplitude (Vrms)
sample rate (S/s) specifies the sampling rate, in samples per second, for the FFT. Use the actual sample rate (S/s) output from the Sample Rate To Loop Time VI to obtain the sampling rate.
error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
spectrum out contains the power or amplitude spectrum corresponding to spectrum type. spectrum out is single-sided and scaled.
df (Hz) returns the frequency resolution of the spectrum in hertz.
error out contains error information. This output provides standard error out functionality.

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