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In the event of an order analysis (Order, hz or Order, 1/min is selected as unit for the frequency axis) the FFT settings are modified. Since the scan during the order analysis is not performed time synchronously, as in the normal FFT, but angle synchronously, the settings relate to indications for speed rather than time. The options for Windowing function, Overlapping and Spectral statistics are identical to the ones of a normal FFT.
 Rotation frequency source
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Selecting the rotation frequency source (required for angle synchronous scan).
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 Rotation frequency range
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Enter rotation frequency range.
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 Order range
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Indicate orders to be displayed (minimum 0).
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 Rotations for 1 spectrum
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Determine the rotations to be collected for 1 spectrum (similar to the time window of FFT). A higher amount leads to a higher line resolution.
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 Process data
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The process data display inner parameters of the FFT that result from the selected settings. They are just for information.
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