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SDS5000X Series Digital Oscilloscope User Manual
Total Harmonic Distortion（THD）=







ï‹™


ïˆ
， where X
n
is the nth
harmonic, and X
1
is the basic component.
27.4 Inrush Current
A large current far greater than the stable current may flow through at the
moment of switching on a power supply. The large current is called inrush
current. The current waveform when switching on is shown in the figure below:
Signal Settings
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