B&K Precision 2552-2559 - Manual - Manual (Page 39)

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• Show the Noise in a DC power supply
• Test the filter and pulse response in a system
• Analyze vibration
Table 9 - FFT Function Menu 1
FFT Option Setting Description
Source CH1, CH2,
CH3*, CH4*
Select this channel as the FFT source.
Window Hanning
Hamming
Rectangular
Blackman
Select FFT window types.
FFT ZOOM 1X
2X
5X
10X
Changes the horizontal magnification of the
FFT display.
Next Page Page 1/2 Enter the second page of FFT menu.
*4CH models only
Table 10 - FFT Function Menu 2
FFT Option Setting Description
Scale Vrms Set Vrms to be the Vertical Scale unit.
dBVrms Set dBVrms to be the vertical Scale unit.
Display
Split
Full screen
Display FFT waveform on half screen.
Display FFT waveform on full screen.
Next Page
Page 2/2 Return to the first page of FFT menu.
To use the Math FFT mode, you need to perform the following tasks:
1. Set up the source (time-domain) waveform.
2. Press the AUTO button to display a YT waveform.
3. Turn the vertical “POSITION” knob to move the YT
waveform to the center vertically (zero divisions).
4. Turn the horizontal “POSITION” knob to position the part
of the YT waveform that you want to analyze in the center
eight divisions of the screen.