B&K Precision 2552-2559 - Manual - Manual (Page 43)

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7. If FFT display on full screen, press CH1 button again to
remove channel waveform display.
8. Press the “CURSOR” button to enter “Cursor” menu.
9. Press the “Cursor Mode” button to select “Manual”.
10. Press the “Type” option button to select “Voltage”.
11. Press the “Source” option button to select “FFT”.
12. Press the “CurA” option button and turn the “Universal”
knob to move Cursor A to the highest point of the FFT
waveform.
13. Press the “CurB” option button, turn the “Universal”
knob to move Cursor B to the lowest point of the FFT
waveform.
14. The amplitude (△V) displays on the top of the left screen.
Figure 25 - Measuring FFT Amplitude
2. Measure FFT Frequency
1. Press the CURSOR button.
2. Press the “Cursor Mode” button to select “Manual”.
3. Press the “Type” option button to select “Time”.
4. Press the “Source” option button to select “FFT”.
5. Press the “CurA” option button and turn the “Universal”
knob to move Cursor A to the highest position of the FFT
waveform.
6. The value of CurA displaying on the top of the left screen
is the highest Frequency. This frequency should be the
same as input signal frequency.