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Section 7: Capturing and analyzing waveforms
Ripple noise on the output voltage
This test measures the ripple voltage captured on the output terminal of the buck converter
evaluation board.
For this test, you will:
•
Connect the 3 Ω load resistor to the output terminals of the buck converter
•
Connect test leads to the output terminals of the buck converter
•
Supply 12 V to the input terminals of the buck converter
•
Reset the instrument
•
Select the digitize voltage function and set sample rate to 1 megasamples per second with a
sample count of 100
•
View the data on the graph screen
•
Turn on horizontal cursors to measure the magnitude of the voltage ripple
Device connections
The connections for the ripple-noise test are shown in the figure below.
7-4
Figure 12: Output voltage connections for the ripple-noise test
Model DMM7510 7½ Digit Multimeter Application Manual
DMM7510-904-01 Rev. D March 2021
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