Order-Domain Analysis Functions
This section describes order-domain analysis functions that you can use to present
sound and vibration information and improve your knowledge of a device under
test.
Refer to the following sections for more information.
Averaged Order Spectra An averaged spectrum displays steady-state vibration components while reducing noise. An order spectrum provides a view of all order components of a signal and can help you find significant orders and compare the level of different order components.Spectral Map A spectral map is a three-dimensional display of sound or vibration spectra as a function of time or speed. The spectra can be frequency or order spectra.Order Tracking You can perform order tracking by computing the order magnitude and phase from an even-angle signal. You also can compute the magnitude and phase of a specific order from the order waveform.Order Waveform Extraction An order waveform is the time signal associated with a certain order, which is synchronous to the rotational speed. Unlike an order power spectrum, which provides information for all of the orders of a certain time block signal, an order waveform provides information only for one particular order relative to time.