Conformance Check Module
How to Set Up or Customize Conformance Test Templates
“FFT Control” Tab
FFT Control tab settings specify the FFT acquisition parameters.
“FFT Control – Normal (Baseband)” Sub-tab
Figure 9 - 11.
FFT Control – Normal (Baseband) Tab.
FFT Lines – Select the number of lines to use for FFT from the drop-down list.
Overlap % – Specify the percentage overlap to apply between acquired FFT blocks,
when the number of averages is greater than one.
Num. Averages – Specify the number of FFT blocks to use when calculating an
averaged FFT.
Average Type – Specify the type of spectral averaging to use:
RMS: Uses RMS averaging.
Peak-Hold: Not a true averaging type but allows the spectral peak values to be
extracted across the acquired number of FFTs.
Window Type – Specify the FFT window to apply.
Min. Freq. Range – Specify the minimum frequency range to apply to all
measurements. By default, the GX searches across all defined measurement bands (see
“Grade Bands” setup) and finds the maximum frequency used. This, in effect, defines
the required frequency range. However, if the measurement grade bands of interest are
at the low frequency end, measurement times can become excessive. To combat this,
the user may use this parameter to improve measurement acquisition times. (An
estimate of the measurement acquisition time is given in the status area at the bottom
of the “FFT Control” tab.)
9 - 10 SKF Microlog - GX Series
User Manual
To Next Page
Loading...
