Amplitude and Phase Spectrum (Not in Base Package)

Computes the single-sided, scaled amplitude spectrum magnitude and amplitude spectrum phase of a real time-domain signal. Details

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.
unwrap phase, when set to TRUE, enables phase unwrapping on the output phase Amp Spectrum Phase (radians). The default is TRUE. If you set unwrap phase to FALSE, the VI does not unwrap the output phase.
dt is the sample period of the time-domain signal, usually in seconds. dt is also where is the sampling frequency of the time-domain signal.
Amp Spectrum Mag is the single-sided amplitude spectrum magnitude in volts rms if the input signal is in volts. If the input signal is not in volts, the results are in input signal units rms.
Amp Spectrum Phase is the single-sided amplitude spectrum phase in radians.
df is the line frequency interval of the power spectrum in Hertz, if dt is in seconds.

Amplitude and Phase Spectrum Details

The Amplitude and Phase Spectrum VI computes the amplitude spectrum as

,

where N is the number of points in the signal array. The VI then converts the amplitude spectrum to single-sided rms magnitude and phase spectra.