Coaxial Fixed Attenuator DC to 50GHz, Connector 2.4mm (m-f). Option: 003 = 3dB Attenuator. The Agilent (now Keysight) 8490D is a Coaxial Fixed Attenuator with a frequency range of DC to 50 GHz. Frequency Range: DC to 50 GHz Attenuation: 3 dB (option 003) Maximum SWR: 0 to 26.5 GHz: 1.15 26.5 to 40 GHz: 1.25 40 to 50 GHz: 1.45 Max. input power: 1 W (average), 100 W peak Connector: 2.4 mm male, female Length: 29 mm Diameter: 8 mm Prescision attenuation Flat frequency response Low SWR Broad frequency range