You are here: NI Home > Support > Product Reference > Manuals > Sound and Vibration Measurement Suite 7.0 Help

Owning Palette: Spectrum Extended Measurements VIs

Installed With: Sound and Vibration Measurement Suite

Converts phase spectra between degrees, radians, and cycles. The data type you wire to the phase spectrum input determines the polymorphic instance to use.

Details  

Use the pull-down menu to select an instance of this VI.

Select an instance SVFA Phase Unit Conversion (1 Ch)SVFA Phase Unit Conversion (N Ch)SVFA Phase Unit Conversion 1 Ch (XY Spectrum)SVFA Phase Unit Conversion N Ch (XY Spectrum)SVFA Phase Unit Conversion 1 Ch, M Orders (XY Spectrum)SVFA Phase Unit Conversion N Ch, M Orders (XY Spectrum)

SVFA Phase Unit Conversion (1 Ch)

	phase spectrum contains the frequency spacing and the phase of the spectrum. The units for phase spectrum are specified in spectrum info in. f0 specifies the start frequency, in hertz, of the spectrum. df specifies the frequency resolution, in hertz, of the spectrum. phase specifies the phase of the spectrum.
	desired units specifies whether the converted phase is returned in units of radians, degrees, or cycles. 0 No change (default) 1 Radians 2 Degrees 3 Cycles
	spectrum info in specifies the properties of the previously computed spectrum. spectrum info in includes the channel name, spectrum type, spectrum scale as linear or dB, applied window, window size, FFT size, units, x-axis units, dB reference, applied weighting, peak units, and spectral density. Note  You must wire spectrum info in when performing extended measurements. Do not modify the spectrum info in values.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use exception control to treat what is normally an error as no error or to treat a warning as an error. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	converted phase spectrum returns the converted phase spectrum scaled according to the desired units. f0 returns the start frequency, in hertz, of the spectrum. df returns the frequency resolution, in hertz, of the spectrum. phase returns the phase of the spectrum.
	unit label returns the engineering units.
	spectrum info out returns the properties of the computed spectrum. spectrum info out includes the channel name, spectrum type, spectrum scale as linear or dB, applied window, window size, FFT size, units, x-axis units, dB reference, applied weighting, peak units, and spectral density. Do not modify the spectrum info out values.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SVFA Phase Unit Conversion (N Ch)

	phase spectra contains the abscissa scaling and the phase for each spectrum. The units for phase spectra are specified in spectrum info in. x0 specifies the start frequency or order of the spectrum. dx specifies the frequency or order resolution of the spectrum. phase specifies the phase of the spectrum.
	desired units specifies whether the converted phase is returned in units of radians, degrees, or cycles. 0 No change (default) 1 Radians 2 Degrees 3 Cycles
	spectrum info in specifies the properties of the previously computed spectrum. spectrum info in includes the channel name, spectrum type, spectrum scale as linear or dB, applied window, window size, FFT size, units, x-axis units, dB reference, applied weighting, peak units, and spectral density. Note  You must wire spectrum info in when performing extended measurements. Do not modify the spectrum info in values.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use exception control to treat what is normally an error as no error or to treat a warning as an error. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	converted phase spectra returns the converted phase spectra scaled according to the desired units. x0 returns the start frequency or order of the spectrum. dx returns the frequency or order resolution of the spectrum. phase returns the phase of the spectrum.
	unit labels returns the unit label for each channel.
	spectrum info out returns the properties of the computed spectrum. spectrum info out includes the channel name, spectrum type, spectrum scale as linear or dB, applied window, window size, FFT size, units, x-axis units, dB reference, applied weighting, peak units, and spectral density. Do not modify the spectrum info out values.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SVFA Phase Unit Conversion 1 Ch (XY Spectrum)

	phase spectrum contains the abscissa scaling and the phase of the spectrum. The units for phase spectrum are specified in spectrum info in. X specifies the abscissa of the phase spectrum. phase specifies the phase of the spectrum.
	desired units specifies whether the converted phase is returned in units of radians, degrees, or cycles. 0 No change (default) 1 Radians 2 Degrees 3 Cycles
	spectrum info in specifies the properties of the previously computed spectrum. spectrum info in includes the channel name, spectrum type, spectrum scale as linear or dB, applied window, window size, FFT size, units, x-axis units, dB reference, applied weighting, peak units, and spectral density. Note  You must wire spectrum info in when performing extended measurements. Do not modify the spectrum info in values.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use exception control to treat what is normally an error as no error or to treat a warning as an error. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	converted phase spectrum returns the converted phase spectrum scaled according to the desired units. X returns the abscissa of the phase spectrum. phase returns the phase of the spectrum.
	unit label returns the engineering units.
	spectrum info out returns the properties of the computed spectrum. spectrum info out includes the channel name, spectrum type, spectrum scale as linear or dB, applied window, window size, FFT size, units, x-axis units, dB reference, applied weighting, peak units, and spectral density. Do not modify the spectrum info out values.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SVFA Phase Unit Conversion N Ch (XY Spectrum)

	phase spectra contains the abscissa scaling and the phase for each spectrum. The units for phase spectra are specified in spectrum info in. X specifies the abscissa of the phase spectrum. phase specifies the phase of the spectrum.
	desired units specifies whether the converted phase is returned in units of radians, degrees, or cycles. 0 No change (default) 1 Radians 2 Degrees 3 Cycles
	spectrum info in specifies the properties of the previously computed spectrum. spectrum info in includes the channel name, spectrum type, spectrum scale as linear or dB, applied window, window size, FFT size, units, x-axis units, dB reference, applied weighting, peak units, and spectral density. Note  You must wire spectrum info in when performing extended measurements. Do not modify the spectrum info in values.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use exception control to treat what is normally an error as no error or to treat a warning as an error. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	converted phase spectra returns the converted phase spectra scaled according to the desired units. X returns the abscissa of the phase spectrum. phase returns the phase of the spectrum.
	unit labels returns the unit label for each channel.
	spectrum info out returns the properties of the computed spectrum. spectrum info out includes the channel name, spectrum type, spectrum scale as linear or dB, applied window, window size, FFT size, units, x-axis units, dB reference, applied weighting, peak units, and spectral density. Do not modify the spectrum info out values.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SVFA Phase Unit Conversion 1 Ch, M Orders (XY Spectrum)

	phase spectra contains the abscissa scaling and the phase for each spectrum. The units for phase spectra are specified in spectrum info in. X specifies the abscissa of the phase spectrum. phase specifies the phase of the spectrum.
	desired units specifies whether the converted phase is returned in units of radians, degrees, or cycles. 0 No change (default) 1 Radians 2 Degrees 3 Cycles
	spectrum info in specifies the properties of the previously computed spectrum. spectrum info in includes the channel name, spectrum type, spectrum scale as linear or dB, applied window, window size, FFT size, units, x-axis units, dB reference, applied weighting, peak units, and spectral density. Note  You must wire spectrum info in when performing extended measurements. Do not modify the spectrum info in values.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use exception control to treat what is normally an error as no error or to treat a warning as an error. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	converted phase spectra returns the converted phase spectra scaled according to the desired units. X returns the abscissa of the phase spectrum. phase returns the phase of the spectrum.
	unit label returns the engineering units.
	spectrum info out returns the properties of the computed spectrum. spectrum info out includes the channel name, spectrum type, spectrum scale as linear or dB, applied window, window size, FFT size, units, x-axis units, dB reference, applied weighting, peak units, and spectral density. Do not modify the spectrum info out values.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SVFA Phase Unit Conversion N Ch, M Orders (XY Spectrum)

	phase spectra contains the abscissa scaling and the phase for each spectrum. The units for phase spectra are specified in spectrum info in. X specifies the abscissa of the phase spectrum. phase specifies the phase of the spectrum.
	desired units specifies whether the converted phase is returned in units of radians, degrees, or cycles. 0 No change (default) 1 Radians 2 Degrees 3 Cycles
	spectrum info in specifies the properties of the previously computed spectrum. spectrum info in includes the channel name, spectrum type, spectrum scale as linear or dB, applied window, window size, FFT size, units, x-axis units, dB reference, applied weighting, peak units, and spectral density. Note  You must wire spectrum info in when performing extended measurements. Do not modify the spectrum info in values.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use exception control to treat what is normally an error as no error or to treat a warning as an error. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	converted phase spectra returns the converted phases scaled according to the desired units. X returns the abscissa of the phase spectrum. phase returns the phase of the spectrum.
	unit labels returns the unit label for each channel.
	spectrum info out returns the properties of the computed spectrum. spectrum info out includes the channel name, spectrum type, spectrum scale as linear or dB, applied window, window size, FFT size, units, x-axis units, dB reference, applied weighting, peak units, and spectral density. Do not modify the spectrum info out values.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SVFA Phase Unit Conversion Details

The following ratios are used to perform phase unit conversions:

180 deg = pi rad = 0.5 cycle