Signal Processing Toolbox

Opening the Spectrum Viewer

To open the Spectrum Viewer and create a PSD estimate from SPTool:

1. Select a signal from the Signal list box in SPTool.
2. Press the Create button in the Spectra list.
3. Press the Apply button in the Spectrum Viewer.

To open the Spectrum Viewer with a PSD estimate already listed in SPTool:

1. Select a PSD estimate from the Spectra list box in SPTool.
2. Press the View button in the Spectra list.

For example:

1. Select mtlb in the default Signals list in SPTool.
2. Press the Create button in SPTool to open the Spectrum Viewer.
3. Press the Apply button in the Spectrum Viewer to plot the spectrum.

   

The Spectrum Viewer has the following components:

• A signal identification region that provides information about the signal whose power spectral density estimate is displayed
• A Parameters region for modifying the PSD parameters
• A display region for analyzing spectra and an Options menu for modifying display characteristics
• Spectrum management controls
• Inherit from menu to inherit PSD specifications from another PSD object listed in the menu
• Revert button to revert to the named PSD's original specifications
• Apply button for creating or updating PSD estimates
• A toolbar with buttons for convenient access to frequently used functions
  
  

  Icon	Description
  	Print and print preview
  	Zoom the signal in and out
  	Select one of several loaded signals
  	Set the display color and line style of a signal
  	Toggle the markers on and off
  	Set marker types
  	Turn on the What's This help

Spectrum Viewer

Filtering and Analysis of Noise

© 1994-2005 The MathWorks, Inc.