Measurement Computing Medallion Rotate rev.2.3 - Manual (Page 38)

38
Medallion Rotate Manual October 2000
E
XAMPLE
This example shows the difference in
the appearance of a Waterfall plot
resulting from order normalization. The
first Waterfall plot does not use order
normalization.
The second Waterfall plot uses order
normalization. Notice that the non-order-
related peaks have been minimized, while order-related peaks have been
enhanced.
1. To use order normalization when
performing a Waterfall analysis,
first select the smoothed machine
speed and the data channels in the
Channels List window. Then click
the Waterfall analysis button.
2. In the Waterfall analysis dialog
box, select Order normalize. Note
that this is not available if you do not select the smoothed machine
speed in the Channels List window.
3. Select the other desired parameters and choose OK to create the order
normalized Waterfall plot.
T
HEORY
Medallion Rotate Plus order normalizes the data by resampling it. Time
waveform data is usually collected using a fixed number of samples/second.
This means that more samples/revolution are collected at lower speeds, and
fewer
samples/revolution at higher speeds. Resampling allows Medallion Rotate Plus
to gather a constant number of samples per revolution, regardless of the speed
of the machine.