Fluke ScopeMeter 192B User Manual page 29

3 Jump to Waveform: and Select
Mathematics... to open the
Mathematics menu.
4 Select Function: A+B, A-B, AxB or
A vs B.
5 Select a scale factor to fit the
mathematical result waveform onto
the display, and return.
The sensitivity range of the mathematical result is equal to
the sensitivity range of the least sensitive input divided by
the scale factor.
Using Mathematics Function Spectrum
(FFT, C Versions)
The Spectrum function shows the spectral content of the
input A or input B waveform. It performs an FFT to
transform the amplitude waveform from the time domain
into the frequency domain.
To reduce the effect of side-lobes (leakage) it is
recommended to use auto windowing. It will automatically
adapt the part of the waveform that is analyzed to a
complete number of cycles
Selecting Hanning, Hamming or no windowing results in a
faster update, but also in more leakage.
Ensure that the entire waveform amplitude remains on the
screen.
To use the Spectrum function, do the following:
1 Display the
2 Open the Waveform Options
menu.
1
Using The Scope
Acquiring Waveforms
key labels.
SCOPE
21