DFD NStage MRate Filtering VI
Owning Palette: Multirate Processing VIs
Installed With: Digital Filter Design Toolkit
Filters a signal continuously with a multistage multirate filter. Wire data to the signal in input to determine the polymorphic instance to use or manually select the instance.
Use the pull-down menu to select an instance of this VI.
 Place on the block diagram | Find on the Functions palette |
DFD NStage MRate Filtering (Array)
 | init? controls the initialization of internal states. The default is FALSE, in which this VI initializes internal states from the final states of the previous call to the current VI instance. If you select TRUE, this VI initializes internal states to zero. | ||||||
 | signal in specifies the input array of single-channel samples you want to process. | ||||||
 | multirate filters specifies the input multirate filters. | ||||||
 | 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.
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| zero phase? specifies whether this VI uses the multirate filter as a zero-phase filter, in which no delay occurs between signal in and signal out. This input is valid only if you set init? to TRUE or if you run this VI for the first time. The default is TRUE. You can use a multistage multirate filter as a zero-phase filter only if every stage is an even-order filter. | ||||||
 | signal out returns an array of filtered single-channel samples. | ||||||
 | 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.
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DFD NStage MRate Filtering (Wfm)
| init? controls the initialization of internal states. The default is FALSE, in which this VI initializes internal states from the final states of the previous call to the current VI instance. If you select TRUE, this VI initializes internal states to zero. | ||||||
 | signal in specifies the input waveform you want to process. | ||||||
| multirate filters specifies the input multirate filters. | ||||||
| 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.
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| zero phase? specifies whether this VI uses the multirate filter as a zero-phase filter, in which no delay occurs between signal in and signal out. This input is valid only if you set init? to TRUE or if you run this VI for the first time. The default is TRUE. You can use a multistage multirate filter as a zero-phase filter only if every stage is an even-order filter. | ||||||
 | signal out returns the filtered waveform. | ||||||
| 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.
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Example
Refer to the Multistage Multirate Filter Continuous Processing VI in the labview\examples\Digital Filter Design\Floating-Point Filters\Multirate directory for an example of using the DFD NStage MRate Filtering VI.
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