DFD Plot Group Delay VI

	output option specifies the group delay response that this VI plots. 0 Auto (default)—This VI automatically determines the responses of filter in to plot. If filter in is a floating-point filter, this VI plots the group delay response of this filter. If filter in is a fixed-point filter, this VI plots the group delay responses of both the fixed-point filter and the reference floating-point filter. 1 Floating-Point Only—If filter in is a floating-point filter, this VI plots the group delay response of this filter. If filter in is a fixed-point filter, this VI plots the group delay response of the reference floating-point filter. 2 Fixed-Point Only—If filter in is a floating-point filter, this VI returns an empty graph. If filter in is a fixed-point filter, this VI plots the group delay response of this filter.
	# freq bins specifies the number of frequency bins between 0 and fs that this VI plots in the group delay response. The default is –1, which specifies that this VI automatically determines the number of frequency bins.
	filter in specifies the input filter.
	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 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.
	fs specifies the sampling frequency in hertz. The default is –1, which specifies that this VI uses the sampling frequency of the input filter.
	group delay unit specifies the unit of measurement for the group delay response. 0 Samples (default) 1 Seconds
	filter out returns the filter in unchanged.
	group delay returns the group delay response of the filter in samples or seconds, depending on the value you specify for the group delay unit input.
	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.

Examples

Refer to the following VIs for examples of using the DFD Plot Group Delay VI:

• Group Delay Compensation VI: labview\examples\Digital Filter Design\Floating-Point Filters\Conventional

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• Analyze Frequency Response of Filter VI: labview\examples\Digital Filter Design\Getting Started\Analyze Filters

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