84 Agilent InfiniiVision 3000 X-Series Oscilloscopes User's Guide
4 Math Waveforms
See Also • "To perform transforms or filters on an arithmetic operation" on
page 73
• "FFT Measurement Hints" on page 84
• "FFT Units" on page 86
• "FFT DC Value" on page 86
• "FFT Aliasing" on page 86
• "FFT Spectral Leakage" on page 87
• "Units for Math Waveforms" on page 74
FFT Measurement Hints
The number of points acquired for the FFT record can be up to 65,536,
and when frequency span is at maximum, all points are displayed. Once
the FFT spectrum is displayed, the frequency span and center frequency
controls are used much like the controls of a spectrum analyzer to
examine the frequency of interest in greater detail. Place the desired part
of the waveform at the center of the screen and decrease frequency span
to increase the display resolution. As frequency span is decreased, the
number of points shown is reduced, and the display is magnified.
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