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


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Inputs/Outputs

  • c1ddbl.png real FFT data —

    real FFT data specifies the real data to convert to the spectrum.

  • c1ddbl.png imaginary FFT data —

    imaginary FFT data specifies the imaginary data to convert to the spectrum.

  • cenum.png spectrum type —

    spectrum type specifies whether the output spectrum is an amplitude or power spectrum. The default is Power (Vrms^2).

    0
    Power (Vrms^2)
    1
    Amplitude (Vrms)
  • cdbl.png sample rate (S/s) —

    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.

  • cerrcodeclst.png error in (no error) —

    error in describes error conditions that occur before this node runs. This input provides standard error in functionality.

  • i1ddbl.png spectrum out —

    spectrum out contains the power or amplitude spectrum corresponding to spectrum type. spectrum out is single-sided and scaled.

  • idbl.png df (Hz) —

    df (Hz) returns the frequency resolution of the spectrum in hertz.

  • ierrcodeclst.png error out —

    error out contains error information. This output provides standard error out functionality.