Analyze Wavefor
mData
Description Window
Hanning
The frequency resolution when using the Hanning (a.k.a. Hann) window is good, the spectral
leakage is low
and amplitude accuracy is fair.
Use the Hanning window for measuring sine, periodic, and narrow band random noise. This
window works well on transients or bursts where the signal levels before and after the event
are significa
ntly different.
Blackman-Harris:
The frequenc
y r esolution when using the Blackman-Harris window is poor, the spectral
leakage is very low and amplitude accuracy is good.
Use the Blackman-Harris window for m easurin g predominantly single frequency waveforms to
look for hig
her order harmonics, or several moderately or widely spaced sinusoidal signals.
Using Advanced Math
The advanced math feature lets you create a custom math wavefo rm expression that can incorporate active and reference
waveforms, measurements, and/or numeric constants. To use this feature:
1. Push Math.
2. Push Advanced Math.
Dual Wfm
Math
FFT Advanced
Math
3. Use the side menu buttons to create custom
expressions.
124 MSO4000B and DPO 4000B Series Oscilloscopes User Manual
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