The F - 62 is used to measure very small currents in the 200 MHz to 1 GHz range. It can be used from 10 MHz to 1 GHz. Its maximum transfer impedance is 13W from 350 MHz to 750 MHz. It can operate without saturation from 200 amperes of DC to 400 Hz, 50 amperes of pulse current and 20 amperes of CW.