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You can use the Spectrum Viewer for estimating and analyzing a signal's power spectral density (PSD). You can use the PSD estimates to understand a signal's frequency content.
The Spectrum Viewer provides the following functionality.
Analyze and compare spectral density plots.
Use different spectral estimation methods to create spectra:
Modify power spectral density parameters such as FFT length, window type, and sample frequency.
Print spectral plots.
To open the Spectrum Viewer with a PSD estimate already listed in SPTool:
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
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