Fluke ScopeMeter 190-502 User Manual page 36

Fluke 190 Series II
Users Manual
4 Select Function: +, -, x or XY-
mode.
ENTER
5 Select the first waveform:
Source 1: A, B, C or D
ENTER
6 Select the second waveform:
Source 2: A, B, C or D
ENTER
The mathematical function key
labels will be displayed now:
7 Press
F2
factor to fit the result waveform
onto the display.
Press
F3
waveform up or down.
Switch the result waveform on/off
F4
(toggle).
The sensitivity range of the mathematical result is equal to
the sensitivity range of the least sensitive input divided by
the scale factor.
28
to select a scale
to move the result
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Using Mathematics Function Spectrum (FFT)
The Spectrum function shows the spectral content of the
input A, B, C or D waveform in the input trace color. It
performs an FFT (Fast Fourier Transform) 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. This 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
SCOPE
2
F4
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Display the key labels.
SCOPE
Open the Waveform Options
menu.