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[[File:b2MAN_Fig228.png|thumb|300px|The FFT Settings dialog for spectrum graph.]]
==Generating a Spectrum Graph from Time-Domain Data==
To generate a spectrum graph, choose "Create Spectrum graph" from the Graph view's Special Functions Menu, or click the "FFT" button on the [[Graph toolbar|Graph Toolbar]]. This opens up the FFT Settings Dialog. At the top of the dialog, you have to select the "Target Signal" from a drop-down list. In the Sampling Options section of the dialog, you will see the start and stop times. You can change your temporal window if necessary. At the top of this section you can specify the "Number of Intervals" from a drop-down list with powers of 2. The default value is 512.
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[[File:b2MAN_Fig229.png|thumb|600px|A graph representing the time-domain output voltage of a diode rectifier.]]
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[[File:b2MAN_Fig230.png|thumb|600px|The spectrum graph corresponding to the time-domain rectified voltage signal.]]
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