Fluke 190 Инструкция по эксплуатации онлайн [32/159] 4548

Fluke 190 Инструкция по эксплуатации онлайн [32/159] 4548
Fluke 19xC-2x5C
Users Manual
22
3
Jump to Waveform: and select
Mathematics... to open the
Mathematics menu.
4
Select Function: Spectrum.
5
Select Window: Auto (automatic
windowing), Hanning, Hamming,
or None (no windowing).
You will see a screen that looks like Figure 11.
Observe that the top right of the screen displays
SPECTRUM.
If it displays LOW AMPL a spectrum measurement cannot
be done as the waveform amplitude is too low.
If it displays WRONG TB the time base setting does not
enable the test tool to display an FFT result. It is either too
slow, which can result in aliasing, or too fast, which results
in less than one signal period on the screen.
6
Perform a spectrum analysis on
trace A, or trace B.
7
Set the vertical amplitude scale to
linear or logarithmic. The horizontal
frequency scale is always
logarithmic.
8
Turn the spectrum function off/on
(toggle function).
Figure 11. Spectrum measurement

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