B&K Precision 2532B - Manual - Manual (Page 50)

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frequency resolution. waveforms, to find
higher order
harmonics.
Magnifying and Positioning and FFT Spectrum
You can magnify and use cursors to take measurements on the FFT
spectrum. The oscilloscope includes an “FFT Zoom” option to magnify
horizontally, press this option button to select “1X”, “2X”, “5X” or “10X”.
Moreover, you also can turn the “Universal” knob to magnify FFT
waveform horizontally in a 1-2-5 step. To magnify vertically; you can turn
the “Volts/div” knob.
Measuring an FFT Spectrum Using Cursors
You can take two measurements on FFT spectrums: magnitude (in dB) and
frequency (in Hz). Magnitude is referenced to 0 dB, where 0 dB equals 1
VRMS. You can use the cursors to take measurements at any zoom factor.
Use horizontal cursors to measure amplitude and vertical cursors to
measure frequency.
If you input a sine signal to channel 1, follow these steps:
1. Measure FFT Amplitude