Hantek DSO1000E Series User Manual page 28

Applying a window to the YT waveform changes the waveform so that the start and stop values
are close to each other, which reduces the discontinuities.
The Math FFT function has three FFT Window options. There is a trade-off between frequency
resolution and amplitude accuracy for each type of window. You shall determine which one to
choose according to the object you want to measure and the source signal characteristics.
Window
Hanning Periodic Waveform
Flattop Periodic Waveform
Rectangular Pulse or Transient Waveform
DSO1000E Series HandHeld Oscilloscope User Manual
Measurement Characteristics
Better frequency, poorer amplitude accuracy than
Flattop
Better amplitude, poorer frequency accuracy than
Hanning
Special-purpose window applicable to
discontinuous waveforms. This is actually the
same as no windows.
Basic Operation
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