With sharp spectral peaks and deep valleys, spectral panorama is usually a picturesque mountain-like view. To help you examine time-frequency plots a special cross-shaped control panel is provided with buttons allowing one to rotate the plot leftward or rightward and to increase or decrease the viewing angle. Playing with 3-D plots is great fun. If, however, you eventually get tired or lost ... simply press the button situated in the center of the panel and everything will get back to 'normal'.
Not only does DART XP Pro allow you to plot the evolutionary spectrum but also to examine its cross-sections made along the time and frequency axes. To see a cross-section select an appropriate frame (or frequency) and press the time (or frequency) radio button placed in the Cross-section group. If you browse through the time or frequency axis with one of the cross-section options switched on you will be able to examine the 3-D plots with surgical precision - slice by slice. Press None to return to a normal spectral display.
To examine more closely a spectral plot for a selected frame press the SPECTRUM
button. When finished press the SPECTRAL VIEW
button to return to the Spectral view dialog.
Finally, to print 3-D spectral plots press the PRINT
button.