Transform | Spectra

Calculates Fourier spectra, Auto & Cross spectra, PSD's or ESD's from time waveforms or frequency spectra.  When this command is executed, the dialog box below is opened.

All of the Data Blocks open in the Work Area are listed in this window.  Only certain data can be used for calculating each type of spectrum.

Fourier spectrum

Auto spectrum

Cross spectrum

Power Spectral Density (PSD)

Energy Spectral Density (ESD)

Time Waveform File

If you choose a Time Waveform File (TWF), time domain windowing, overlap processing, and spectrum averaging can be used to calculate spectral estimates.