Display Region :: GUI: Filter Design and Analysis Tool (Signal Processing Toolbox)

Signal Processing Toolbox

Display Region

The following information is provided about the Display Region:

Response Types and Icons

This following types of plots are displayed in the Display Region. You can select the plot type from the Analysis menu or from the toolbar.

Icon
Icon Name
Description

Filter Specification
(default plot when you open the GUI)

Displays a schematic of the filter parameters (such as F_pass and F_stop) that can be specified in the Design Filter Panel. The axes use the units currently selected in the Units menus of the Frequency Specifications Region and Magnitude Specifications Region. The plot does not reflect the actual values of the filter specifications.

Magnitude Response

Shows the actual magnitude response of the current filter. See freqz for more information.

To see the zero-phase response, right-click on the y-axis label of the Magnitude plot and select Zero-phase from the context menu.

Phase Response
Shows the actual phase response of the current filter. See freqz for more information.

Magnitude and Phase Responses

Superimposes the magnitude response and the phase response of the current filter. See freqz for more information.

Group Delay
Shows the group delay of the current filter. Group delay is average delay of the filter as a function of frequency. See grpdelay for more information.

Phase Delay
Shows the phase delay of the current filter. Phase delay is the time delay the filter imposes on each component of the input signal. See phasedelay for more information.

Impulse Response
Shows the impulse response of the current filter. The impulse response is the response of the filter to a impulse input. See impz for more information.

Step Response
Shows the step response of the current filter. The step response is the response of the filter to a step input. See stepz for more information.

Pole-Zero Plot
Shows the pole and zero locations of the current filter on the z-plane. See zplane for more information.

Filter Coefficients
Lists the coefficients of the current filter, which depend on the filter structure (e.g., direct-form, lattice, etc.) in a text box.
Use Convert structure or Convert to Second-Order Sections on the Edit menu to transform a filter from one structure to another, or use the Import Filter Panel to directly import a filter with the desired structure.

Filter Information
Lists filter details. For multistage filters, the details are listed for each stage.

Icon	Icon Name	Description
	Filter Specification (default plot when you open the GUI)	Displays a schematic of the filter parameters (such as F_pass and F_stop) that can be specified in the Design Filter Panel. The axes use the units currently selected in the Units menus of the Frequency Specifications Region and Magnitude Specifications Region. The plot does not reflect the actual values of the filter specifications.
	Magnitude Response	Shows the actual magnitude response of the current filter. See `freqz` for more information. To see the zero-phase response, right-click on the y-axis label of the Magnitude plot and select Zero-phase from the context menu.
	Phase Response	Shows the actual phase response of the current filter. See `freqz` for more information.
	Magnitude and Phase Responses	Superimposes the magnitude response and the phase response of the current filter. See `freqz` for more information.
	Group Delay	Shows the group delay of the current filter. Group delay is average delay of the filter as a function of frequency. See `grpdelay` for more information.
	Phase Delay	Shows the phase delay of the current filter. Phase delay is the time delay the filter imposes on each component of the input signal. See `phasedelay` for more information.
	Impulse Response	Shows the impulse response of the current filter. The impulse response is the response of the filter to a impulse input. See `impz` for more information.
	Step Response	Shows the step response of the current filter. The step response is the response of the filter to a step input. See `stepz` for more information.
	Pole-Zero Plot	Shows the pole and zero locations of the current filter on the z-plane. See `zplane` for more information.
	Filter Coefficients	Lists the coefficients of the current filter, which depend on the filter structure (e.g., direct-form, lattice, etc.) in a text box. Use Convert structure or Convert to Second-Order Sections on the Edit menu to transform a filter from one structure to another, or use the Import Filter Panel to directly import a filter with the desired structure.
	Filter Information	Lists filter details. For multistage filters, the details are listed for each stage.

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