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.
Applications
Isolated probes offer significant benefits across multiple industries and applications. Most commonly used in power electronic full-bridge and half-bridge architectures, they enhance efficiency and performance testing of fast-switching devices such as wide bandgap GaN and SiC semiconductors. With support for high-voltage differential measurements up to ±2,500 V and the ability to reject common-mode signals up to ±60,000 V, isolated probes play a critical role in applications like automotive Electric Vehicle (EV) testing and photovoltaic solar power conversion.
Model information
Probes
PS0004A Optically isolated differential probe, 350 MHz, 2-meter
PS0006A Optically isolated differential probe, 700 MHz, 2-meter
PS0008A Optically isolated differential probe, 1 GHz, 2-meter
Probe tips
PS0017A Probe tip, ±10 V, MMCX
PS0018A Probe tip, ±30 V, MMCX
PS0019A Probe tip, ±250 V, MMCX
PS0022A Probe tip, ±10 V, 100 mil pitch, 0.025” square pin socket
PS0023A Probe tip, ±100 V, 100 mil pitch, 0.025” square pin socket
PS0025A Probe tip, ±500 V, 100 mil pitch, 0.025” square pin socket
PS0027A Probe tip, ±1000 V, 200 mil pitch, 0.025” square pin socket
PS0028A Probe tip, ±2500 V, 200 mil pitch, 0.025” square pin socket
Accessories
PS0013-64701 Bipod (included with each probe)
8710-2466 SMA wrench (included with each probe)
PS0010A Basic connectivity kit
PS0014A Isolated probe adapter for 3D probe positioner (N2787A)
PS0015A Probe deskew and performance verification kit with MMCX