AEMC OX7102-CII, User Manual

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Oscilloscope Mode - The "Horizontal" Menu
SCOPIX Oscilloscopes IV - 73
Oscilloscope Mode (cont'd)
Rectangular
Hamming
Hanning
Blackman
The sub-menus select a type of window.
Before calculating the FFT, the oscilloscope weights the signal to be
analyzed by means of a window acting as a band-pass filter. The choice of
window type is essential to distinguish between the various lines of a
signal and to make accurate measurements.
Time representation
of signal to be
analyzed
Weighting window
Weighted signal
Frequency
representation of
signal calculated by
FFT