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dataPAC User’s Guide
Chapter 3 - Collecting and Reviewing Data
Amplitude - Auto Scale (data)
This option redraws the FFT graph with the vertical scale set to the highest peak in the FFT
data set. This is the default mode of operation.
Frequency - 10 X Speed
This option adjusts the frequency scale to show only those spectral bins that represent
frequencies that are less than 10 times the machine speed, or the collected Fmax, depending
on which is less.
Frequency - Between Cursors
This option redraws the FFT graph showing only the FFT data between the low and the high
frequency cursors. This option is only available when Dual cursors are active, and when
they are not at the extreme limits of the display, and when they include a minimum of three
spectral bins. You can also press <F2> (Mag Cursor) to access to this option without using
the magnify menu.
Frequency - Full Spectrum
This option displays all of the spectrum data on the graph.
Frequency - Zoom Between Cursors
This option resamples the data, taking a true zoom measurement using the high and low
cursors for Fmin and Fmax. This option is only available when Dual cursors are active, and
when they are not at the extreme limits of the display, and when they include a minimum
range of 2000 Hz.
To use true zoom with an Off Route measurement
This option (available from Off Route only) starts a new “true zoom” measurement using
the frequency of the low cursor for Fmin, and the frequency of the high cursor for Fmax.
Press<SHIFT><F2> (Magnify) and select Frequency - Zoom Between Cursors. The
dataPAC begins a new measurement with true zoom parameters.
To magnify the area around the primary cursor
Use the arrow keys to move the primary cursor to the area you wish to magnify. Press <F2>
(Mag. Cursor) to magnify the area around the primary cursor. Press <F2> (Full Spectrum)
again to return to original magnification.
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