The primary measurement tool used to test and characterize power supplies is an oscilloscope. Many of today’s scopes, including the Keysight Technologies, Inc. InfiniiVision X-Series, offer special powermeasurement options that can help automate many of the most important measurements. Figure 1 shows a list of the power supply characterization measurements that are available on Keysight’s InfiniiVision 3000T, 4000, and 6000 X-Series oscilloscopes with the power measurements option (DSOX3PWR, DSOX4PWR, DSOX6PWR). Unique to Keysight’s portfolio of measurements are frequency response measurements