Learn more about Signal Processing Toolbox

sptool - Open interactive digital signal processing tool

Syntax

sptool

Description

sptool opens SPTool, a graphical user interface (GUI) that manages a suite of four other GUIs: Signal Browser, Filter Design and Analysis Tool, FVTool, and Spectrum Viewer. These GUIs provide access to many of the signal, filter, and spectral analysis functions in the toolbox. When you type sptool at the command line, the SPTool GUI opens.

Image of SPTool GUI

Using SPTool you can

Analyze signals listed in the Signals list box with the Signal Browser
Design or edit filters with the Filter Design and Analysis Tool (icludes a Pole/Zero Editor)
Analyze filter responses for filters listed in the Filters list box with FVTool
Apply filters in the Filters list box to signals in the Signals list box
Create and analyze signal spectra with the Spectrum Viewer
Print the Signal Browser, Filter Design and Analysis Tool, and Spectrum Viewer

You can activate the four integrated signal processing GUIs from SPTool.

Signal Browser

The Signal Browser allows you to view, measure, and analyze the time-domain information of one or more signals. To activate the Signal Browser, press the View button under the Signals list box in SPTool.

Filter Design and Analysis Tool

The Filter Design and Analysis Tool fdatool allows you to design and edit FIR and IIR filters. See FDATool: A Filter Design and Analysis GUI for detailed information on using fdatool. To launch fdatool, press either the New button or the Edit button under the Filters list box in SPTool.

The Filter Design and Analysis Tool has a Pole/Zero Editor you can access by selecting the icon in the left-hand column of FDATool.

Filter Visualization Tool

The The Filter Visualization Tool (fvtool) allows you to view the characteristics of a designed or imported filter, including its magnitude response, phase response, group delay, phase delay, pole-zero plot, impulse response, and step response. To activate FVTool, click the View button under the Filters list box in SPTool.

Spectrum Viewer

The Spectrum Viewer allows you to analyze frequency-domain data graphically using a variety of methods of spectral density estimation, including the Burg method, the FFT method, the multitaper method, the MUSIC eigenvector method, Welch's method, and the Yule-Walker autoregressive method. To activate the Spectrum Viewer:

Click the Create button under the Spectra list box to compute the power spectral density for a signal selected in the Signals list box in SPTool. You may need to click Apply to view the spectra.
Click the View button to analyze spectra selected under the Spectra list box in SPTool.
Click the Update button under the Spectra list box in SPTool to modify a selected power spectral density signal.

In addition, you can right-click in any plot display area of the GUIs to modify signal properties.

See SPTool: A Signal Processing GUI Suite for a full discussion of how to use SPTool.