SVT Get Octave Subset VI

SVT Get Octave Subset VI

Owning Palette: Octave Extended Measurements VIs

Requires: Sound and Vibration Toolkit

Extracts the subset of the octave spectrum specified by frequency range for a single channel or N channels. Wire data to the octave spectrum input to determine the polymorphic instance to use or manually select the instance.

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

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. The default is –1.00 Hz. 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. The default is –1.00 Hz.
	octave info in specifies octave measurement information for each channel. Note  You must wire octave info in when performing extended measurements. Do not modify the octave info in values. If you want to view the information, you can right-click the octave info in wire and select Custom Probe»Octave Info from the shortcut menu.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	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. Note  You must wire octave info out when performing extended measurements. Do not modify the octave info out values. If you want to view the information, you can right-click the octave info out wire and select Custom Probe»Octave Info from the shortcut menu.
	error out contains error information. This output provides standard error out functionality.

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. The default is –1.00 Hz. 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. The default is –1.00 Hz.
	octave info in contains octave measurement information for each channel. Note  You must wire octave info in when performing extended measurements. Do not modify the octave info in values. If you want to view the information, you can create a custom probe.
	error in describes error conditions that occur before this node runs. This input provides standard error in functionality.
	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 selected engineering units 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. Note  You must wire octave info out when performing extended measurements. Do not modify the octave info out values. If you want to view the information, you can create a custom probe.
	error out contains error information. This output provides standard error out functionality.