Probing hints for accurate, repeatable power-supply measurements

For power-supply designers, the oscilloscope is an essential measurement tool in debugging and testing power supplies. Modern oscilloscopes such as Agilent’s 7000 Series offers a full suite of measurement features, power-application software and probes for power-supply designers to easily perform power measurement, characterization and probing.

Making accurate power measurements, using both scope-voltage and -current probes, presents a number of challenges that must be considered prior to testing. Using improper probes or probing technique can affect the measurement result. This article examines these challenges and provides key probing tips for making accurate and repeatable power supply measurements.

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About the author

Jae-yong Chang, Product Marketing Engineer, Digital Validation Division, Electronic Measurements Group, Agilent Technologies,  received his BA and MS degree in Physics from Sogang University, Seoul, Korea. Jae-yong joined HP Korea in 1990 as a R&D design engineer, and has held various positions in R&D and marketing in HP and Agilent Technologies. He is the product manager for the company’s affordable oscilloscope product line in the Design Validation Division based in Colorado Springs, Colorado.