Coaxial Termination 50Ohm, DC 50GHz, 2.4mm (m) The Agilent (now Keysight) 85138A is a precision, low-reflection dc to 50 GHz load with 2.4mm male connector for terminating a 50-ohm coaxial system in its characteristic impedance. RF performance: Max. SWR at 26.5 GHz: 1.07 Max. SWR at 40 GHz: 1.12 Max. SWR at 50 GHz: 1.22 Max. power: 0.5 W avg/ 100 W peak