Spider DSA User’s Manual
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Figure 213: Live signals for a typical Order tracking test
The signals are by default sorted according to the type of the signals. When
multiple modules are used, the signals can be sorted according to each module
can be set by right clicking on the Pane and click on “Sort Signals by Spider
module”.
3D Signals Display
3D signals are of particular importance in Order tracking and enable convenient
analysis by plotting the consecutive blocks of data in the 3
rd
dimension to analyze
the changes in the block signal. Typically, the Z-axis or the Reference axis can be
Time or RPM.
EDM has a capability to plot the signals in 3D by either using time or RPM as the
reference axis. 3D signals can typically be displayed in two different ways:
3D Waterfall Trace is used to display order spectra and order tracks vs. RPM
or time in three dimensions.
Color Spectrogram is used to display order spectra and order tracks vs. RPM
or time in 2 dimensions using color to represent the magnitude of the signal.
The limits of the 3D waterfall and color spectrogram depend on the Analysis
Parameters such as low and high RPM and max order. The resolution of the plots
depends on the Analysis Parameters delta RPM and delta order. Note that a larger
RPM or order span or a higher resolution will affect the acquisition of the data
and the memory required. Best quality results can be obtained by selecting
optimum resolutions.
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