Keysight has developed an optically isolated differential probing family that enables accurate and safe measurement of floating circuits in high-voltage, noisy environments. The new voltage probes will be displayed at Keysight's booth at the Applied Power Electronics Conference 2025.
Keysight Technologies has developed an optically isolated differential probing family dedicated to enhancing efficiency and performance testing of fast-switching devices such as wide bandgap GaN and SiC semiconductors. The new voltage probes will be displayed at Applied Power Electronics Conference (APEC) 2025 in Keysight’s booth (#829) along with Keysight’s MXR B and HD3 series of oscilloscopes.
Validation of floating half-bridge and full-bridge architectures commonly used in power conversion, motor drives, and inverters requires measurement of small differential signals riding on high common-mode voltages. This measurement can be challenging due to voltage source fluctuations relative to ground, noise interference, and safety concerns. Isolated differential probes are galvanically isolated and reject common-mode voltages, enabling power electronics engineers to measure floating circuits accurately and safely in high-voltage, noisy environments. This technology will drive progress in efficiency and switching loss testing for high-voltage applications like electric vehicles (EVs), solar energy, battery management systems, and more.
Keysight’s isolated differential probes provide up to 10 billion times greater common-mode rejection than standard differential probes, making them ideal for high-voltage, high-side measurements. With up to 1 GHz bandwidth and a ±2,500 V differential voltage range, these probes enable accurate analysis of fast-switching GaN and SiC devices.
