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SDS2000X HD Series Digital Oscilloscope User Manual
2 4 6 i n t . s i g l e n t . c o m
Connection Guide
Touch Signal > Connection Guide to recall the connection guide of power efficiency, as shown
in the figure below. Please follow the instructions in this figure for connection. Touch the icon on the
top right of the guide to close.
Note: Perform a Deskew operation between the voltage and current input channels before the test.
See section “Switching Loss” for more details on deskewing.
The test steps are as followed:
1. In the Input Setup menu, assign correct channels to Input Voltage and Input Current .
Set Duration as the expected observed duration, then the oscilloscope will automatically set
the timebase according to it.
2. In the Config menu set Voltage Limit , Current Limit , and Power Limit parameters
according to the datasheet of the MOSFET device under test, then the oscilloscope will
automatically generate the SOA and the vertical scale of the Input Voltage and Input Current
channels according to them.
3. Turn on Test State . The oscilloscope will begin to acquire the voltage and current waveforms,
and display the SOA measurement, showing if the measured stresses are in the SOA or not.
4. Users can adjust horizontal, vertical, and trigger settings during the test for best observation.
Below is an example of testing the power-up stresses on a MOSFET and judging if the stresses are
safe for the MOSFET using the SOA:
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