RF current monitor probes measure common mode “antenna” currents that flow on cables or wires. A faultily filtered or bonded cable could cause a radiated emissions failure at a certified EMC lab or testing facility, and to prevent this expensive waste of time, an RF current monitor probe can be rented to ensure EMC compliance before testing or in preparation for a subsequent attempt. The probes measure current by placing a conductor, which carries the current, within what is referred to as the “sensing” window of the probe, and then testing the probe’s output voltage with the RF detector. Each probe has a frequency range found in the impedance curve. An RF current monitor probe is generally paired with a bulk current injection probe to measure the fluctuations of a low or high-level radio frequency signal. Current is injected into a line or cable bundle to test the stability of the connection’s current.