Computes the single-sided, scaled, cross power spectrum of two real-time signals. Details
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Signal X is the input, time-domain signal X, usually in volts. At least three cycles of the signal must be contained in the time-domain record for a valid estimate. |
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Signal Y is the input, time-domain signal Y, usually in volts. At least three cycles of the signal must be contained in the time-domain record for a valid estimate. |
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dt is the sample period of the time-domain signal, usually in seconds.
dt is also ![]() ![]() |
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Cross Power XY Spectrum Mag is the single-sided, cross power spectrum between signals X and Y in volts rms squared if the input signals are in volts. If the input signals are not in volts, the results are in input signal units rms squared. |
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Cross Power XY Spectrum Phase is the phase spectrum in radians showing the difference between the phases of signal Y and signal X. |
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df is the line frequency interval of the power spectrum in Hertz, if dt is in seconds. |
The cross power spectrum gives the product of the amplitude of the signals X and Y and the difference between their phases, phase of Y minus phase of X.
The Cross Power Spectrum VI computes the cross power spectrum as
,
where N is the number of points in array Signal X or Signal Y. The Cross Power Spectrum VI then converts the cross power spectrum to single-sided magnitude and phase spectra.