Tektronix MDO4000C Series, User Manual

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Using FFT
An FFT function breaks down signals into component frequencies, which the
oscilloscope uses to display a graph of the frequency domain of a signal, as
opposed to the oscilloscope's standard time domain graph. You can match these
frequencies with known system frequencies, such as system clocks, oscillators, or
power supplies.
1. Push Math .
2. Push FFT .
Dual Wfm Math FFT Advanced Math Spectrum Math (M) Label
2
3. Push FFT Source on the side menu, if needed, and turn multipurpose knob a
to select the source to use. Choices are: channels 1, 2, 3, 4, reference
waveforms 1, 2, 3, and 4.
4. Push Vertical Scale on the side menu repeatedly to select either Linear RMS
or dBV RMS.
5. Push Window on the side menu repeatedly to select the desired window.
Analyze waveform or trace data
MDO4000C Series Oscilloscope User Manual 89
Preliminary