Signal Processing Toolbox

Analyzing the Filter

Once you've designed the filter, you can view the following filter response characteristics in the display region or in a separate window (see Displaying the Response in FVTool):

• Magnitude response
• Phase response
• Magnitude and Phase responses
• Group delay response
• Phase delay response
• Impulse response
• Step response
• Pole-zero plot
• Zero-phase response--available from the y-axis context menu in a Magnitude or Magnitude and Phase response plot.

You can display two responses in the same plot by selecting Overlay Analysis from the Analysis menu and selecting an available response. A second y-axis is added to the right side of the response plot. (Note that not all responses can be overlaid on each other.)

You can also display the filter coefficients and detailed filter information in this region.

For all the analysis methods, except zero-phase response, you can access them from the Analysis menu, the Analysis Parameters dialog box from the context menu, or by using the toolbar buttons. For zero-phase, right-click on the y-axis of the plot and select Zero-phase from the context menu.

For example, to look at the filter's magnitude response, select the Magnitude Response button  on the toolbar.

You can also overlay the filter specifications on the Magnitude plot by selecting Design Mask from the View menu.

Note    You can use Design Masks in FVTool only if FVTool was launched from FDATool.

Computing the Filter Coefficients

Using Data Markers

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