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RIGOL Chapter 6 Operations and Measurements
6-8 MSO5000 User Guide
descriptions in "Parameter Setting Method".
⚫ Press More → Peak Search to enter the peak search menu.
Press Peak Search continuously to enable or disable the peak search function.
When enabled, the peak search results are displayed on the screen, as shown in
the figure below. Enable the touch screen and tap the "Math" label at the top of
the peak search results to switch among Math1-Math4.
➢ Press Peak Number, then rotate the multifunction knob or use the
pop-up numeric keypad to set the number of peaks. The available range is
from 1 to 15. By default, it is 5.
➢ Press Threshold, then rotate the multifunction knob or use the pop-up
numeric keypad to set the threshold of the peak.
➢ Press Excursion, then rotate the multifunction knob or use the pop-up
numeric keypad to set the excursion of the peak.
➢ Press Table Order, then rotate the multifunction knob to select the
sorting mode of the peak. Press down the knob to select it. You can also
press Table Order continuously or enable the touch screen to select it. The
available sorting mode is "Amp Order" and "Freq Order". By default, it is
"Amp Order".
➢ 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".
⚫ Press More → Window to select the desired window function.
Spectral leakage can be considerably decreased when a window function is used.
MSO5000 provides 6 FFT window functions (as shown in Table 6-1) which have
different characteristics and are applicable to measuring different waveforms.
You need to select the window function according to the characteristics of the
waveform to be measured.
Table 6-1 Window Function
Window
Function
Characteristics
Waveforms Applicable to the
Window Function
Rectangular
Best frequency
resolution
Poorest
amplitude
resolution
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
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