The Keysight Technologies 1147B CAL is a calibrated DC to 50 MHz bandwidth active current probe capable of measuring up to 15A continuous DC, 15A peak AC, and 30A peak currents. It features an AutoProbe interface compatible with InfiniiVision and Infiniium oscilloscopes, supporting high-impedance configurations for accurate transient current measurements. The probe offers a fast rise time of 7 ns or less, a flat frequency response, low noise, and a split-core design for easy connection, degaussing, and calibration. It supports measurements of conductors up to 5mm in diameter, with a maximum input voltage of 300V CAT and rated power of 3VA. Its high signal-to-noise ratio and protective functions ensure safe and precise current detection, suitable for applications such as testing motor controllers, switching power supplies, and inverters. Power is supplied through the oscilloscope, requiring no external power source.