FAG Detector III User Manual page 172

2. Enter the Number of values you want to calculate the spectrum for. The pre-set
value is equal to the maximum applicable value.
3. Define % overlap.
4. Click on OK.
The spectrogram is shown in the "Calculated FFT" diagram.
You can change the display under FFT settings in the work interface area (see
Waterfall charts
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Difference cursor
You can use the difference cursor to calculate the difference between
two measured values.
To do this, place the base cursor and a difference cursor at the desired
measuring points in the diagram. The distance between the cursors is
indicated by a colored bar directly above the x-axis. Both measured
values obtained with the cursors and the resulting differential values
are displayed in the cursor information.
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The numb er values you enter for the calculation will b e
increased automatically to the next power of two.
Example: If you want to calculate a spectrogram for 1000
measure values, the calculation value will b e set to 1024
automatically. The calculated FFT will contain 512
measure values.
).