Table of Contents
Advertisement
Operations and Measurements
-
•
Press More > Window to select the desired window function.
Spectral leakage can be considerably decreased when a window function is used.
This series of oscilloscope provides 6 FFT window functions (as shown in
9.1 Window Function
measure different waveforms. You need to select the window function according
to the characteristics of the waveform to be measured.
Table 9.1 Window Function
Window
Function
Rectangular
Blackman-
Harris
Hanning
Hamming
146
Press Export, and the save setting menu is displayed. You can export the
peak search results to the internal memory or the external USB storage
device in CSV format. For detailed saving operation, refer to descriptions in
Store and Load
"
".
) which have different characteristics and are applicable to
Characteristics
Best frequency
resolution
Poorest amplitude
resolution
Similar to the situation
when no window is
applied.
Best amplitude
resolution
Poorest frequency
resolution
Better frequency
resolution and poorer
amplitude resolution
compared with
Rectangular
A little bit better
frequency resolution
than Hanning
Waveforms Applicable to the Window
Function
Transient or short pulse, the signal levels
before and after the multiplication are
basically the same.
Sine waveforms with the same amplitudes
and rather similar frequencies.
Wide band random noise with relatively
slow change of waveform spectrum.
Single frequency signal, searching for higher
order harmonics
Sine, periodic, and narrow band random
noise
Transient or short pulse, the signal levels
before and after the multiplication are
rather different
Copyright ©RIGOL TECHNOLOGIES CO., LTD. All rights reserved.
Table
Advertisement
Table of Contents
