current probes

Current probes are transformers that translate magnetic fields into measurable voltages. This comprehensive guide explains the physics behind current probe measurements, from Faraday's law to transfer impedance calculations, with real EMC test results in all three detection modes.

Start‑up transients can hide major EMI and reliability problems. By capturing inrush current spikes and high‑frequency events with high‑bandwidth scopes and probes, engineers can uncover failures, resets, and random behavior caused by fast di/dt during power‑up—and design effective fixes.

Why do cables radiate? Common mode currents are the culprit. Through four practical experiments, learn how return paths, grounding switches, and parasitic capacitances determine whether your current stays differential—or becomes a radiating common mode problem.