Spider DSA User’s Manual
296
Figure 202: Measured signals setup – Order Spectra
Any channel for which the Order Spectrum is required must be enabled by
checking the corresponding Measure box for that channel.
Since the Order Spectra are block signals calculated every frame, each frame of
the order spectral signal can be saved by enabling the order spectra of a channel
in the Save list. Checking the Save List saves the signals when the User clicks on
the Save Signals button in the Control Panel, or when save signals is otherwise
executed.
FFT spectra
FFT spectrum is identical to the FFT calculation in an FFT Analysis test.
The following figure shows the FFT Spectra for a 16 channel (2 module) system.
The FFT Spectral signals can be measured on both Master and slave units.
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