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Owning Palette: Octave Extended Measurements VIs

Installed With: Sound and Vibration Measurement Suite

Extracts the subset of the octave spectrum specified by frequency range for a single channel or N channels.

Use this VI for operations such as computing the total band power, or limiting subsequent spectrum operations to the region of interest.

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

Select an instance SVT Get Octave Subset (1 Ch)SVT Get Octave Subset (N Ch)

SVT Get Octave Subset (1 Ch)

	octave spectrum specifies the octave spectrum to perform the operation on, in band power versus nominal frequencies. nominal frequencies [Hz] specifies the nominal, or preferred, frequencies as opposed to the exact frequencies associated with each 1/n octave band. band power specifies the band power in decibels associated with each 1/n octave band.
	frequency range [Hz] specifies the low and high frequencies corresponding to the desired octave spectrum subset. start specifies the lowest frequency of interest for the analysis band in hertz. The valid range is between 0 and the Nyquist frequency. Specify a value of —1 to select the lowest frequency as the minimum frequency of interest. stop specifies the highest frequency of interest for the analysis band in hertz. The valid range is between 0 and the Nyquist frequency. Specify a value of —1 to select the highest frequency as the maximum frequency of interest.
	octave info in contains information about the octave spectrum.
	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.
	octave spectrum subset returns the portion of the spectrum within the input frequency range. nominal frequencies [Hz] returns the nominal, or preferred, frequencies as opposed to the exact frequencies associated with each 1/n octave band. band power returns the band power in decibels associated with each 1/n octave band.
	unit label returns the selected engineering units.
	total band power returns the sum of the power, in decibels, contained in all of the octave bands in the octave spectrum subset.
	octave info out returns information about the octave spectrum.
	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.

SVT Get Octave Subset (N Ch)

	octave spectra specifies the octave spectra to perform the operation on, in band power versus nominal frequencies. nominal frequencies [Hz] specifies the nominal, or preferred, frequencies as opposed to the exact frequencies associated with each 1/n octave band. band power specifies the band power in decibels associated with each 1/n octave band.
	frequency range [Hz] specifies the low and high frequencies corresponding to the desired octave spectrum subset. start specifies the lowest frequency of interest for the analysis band in hertz. The valid range is between 0 and the Nyquist frequency. Specify a value of —1 to select the lowest frequency as the minimum frequency of interest. stop specifies the highest frequency of interest for the analysis band in hertz. The valid range is between 0 and the Nyquist frequency. Specify a value of —1 to select the highest frequency as the maximum frequency of interest.
	octave info in contains octave measurement information for each channel.
	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.
	octave spectra subsets returns the portion of the spectrum within the input frequency range for each channel. You can display the results in an Octave Graph or a Multiplot Octave Graph indicator. nominal frequencies [Hz] returns the nominal, or preferred, frequencies as opposed to the exact frequencies associated with each 1/n octave band. band power returns the band power in decibels associated with each 1/n octave band.
	unit labels returns the unit label for each channel.
	total band powers returns the sum of the power, in decibels, contained in all of the octave bands in octave spectra subsets.
	octave info out contains the octave information for each channel.
	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.