Auto Power Spectrum (Not in Base Package)

Computes the single-sided, scaled, auto power spectrum of a time-domain signal. Details  Examples

	Signal is the input, time-domain signal, usually in volts. At least three cycles of the signal must be contained in the time-domain record for a valid estimate.
	dt is the sample period of the time-domain signal, usually in seconds. dt is also where fs is the sampling frequency of the time-domain signal.
	Power Spectrum is the single-sided power spectrum in volts rms squared if the input signal is in volts. If the input signal is not in volts, the results are in input signal units rms squared.
	df is the frequency interval of the power spectrum in hertz, if dt is in seconds.

Auto Power Spectrum Details

This VI computes the power spectrum using the following equation.

where N is the number of points in the signal array and * denotes complex conjugate. The VI then converts the power spectrum into a single-sided power spectrum result.

Examples

Refer to the following VIs for examples of using the Auto Power Spectrum VI:

• Sound Card Simple Spectrum Analyzer VI: labview\examples\sound\sound adv.llb

   

• Sound Card AutoPower Spectrum VI: labview\examples\sound\sound adv.llb