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Window
Function
Characteristics
Waveforms Applicable to the
Window Function
Wide band random noise with
relatively slow change of waveform
spectrum
Blackman-
Harris
Best amplitude resolution
Poorest frequency resolution
Single frequency signal, searching
for higher order harmonics
Hanning
Better frequency resolution and
poorer amplitude resolution
compared with Rectangular
Sine, periodic, and narrow band
random noise
Hamming
A little bit better frequency
resolution than Hanning
Transient or short pulse, the signal
levels before and after the
multiplication are rather different
Flattop Measure the signals accurately
Measure the signal that has no
accurate reference and requires an
accurate measurement
Triangle Better frequency resolution
Measure the narrow band signal
and that has strong noise
interference
Color Grade
Click or tap the Color Grade on/off switch to enable/disable the color grade display
of FFT operation results. When enabled, different colors are displayed on the screen
to indicate the times of data acquisition or acquisition probability. Click or tap the
Reset button for the Color Grade menu to clear the color grade display and display
the color grade again.
Peak Search
Click or tap the icon
at the right side of Peak Search to enter the peak search
menu, as shown in the figure below.
Math Operation
Copyright ©RIGOL TECHNOLOGIES CO., LTD. All rights reserved.
DHO4000 User Guide
141
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