Keysight PS0008A Optically Isolated Differential Probe, 1 GHz

Product Highlights

Galvanically isolated voltage probes separate the device under test (DUT) from the oscilloscope and earth ground, enabling safer and more accurate measurements. This isolation effectively rejects common-mode signals, minimizes noise interference, and eliminates ground loops in high-voltage environments. A high common-mode rejection ratio (CMRR) is essential for capturing small signals accurately, even in the presence of large common-mode voltages at floating nodes. The CMRR of an isolated probe can be over 100 million times greater than that of a standard differential voltage probe referenced to earth ground. The CMRRs of Keysight's isolated probes are driven by the attached probe tip.

Beyond high CMRR and enhanced safety, isolated probes offer additional advantages over standard differential probes. Their isolation makes them less susceptible to electromagnetic interference (EMI), reducing signal distortion. Additionally, Keysight's isolated probes support higher offset voltages and wider differential voltage ranges at higher bandwidths, ensuring precise measurements of fast-switching signals and transients in noisy, high-common-mode environments.

The electrical ratings below are for probe pods and sensor heads without a probe tip. Each isolated probe requires the use of a probe tip, and therefore, the lower electrical rating of the two is applicable when used in combination.

Isolated probes provide substantial advantages in various industries and applications. They are frequently utilized in power electronic full-bridge and half-bridge architectures, improving the efficiency and performance testing of fast-switching devices like wide bandgap GaN and SiC semiconductors. These probes support high-voltage differential measurements up to 2,500 V and can reject common-mode signals up to 60,000 V, making them essential for automotive electric vehicle (EV) testing and photovoltaic solar power conversion.