The AF077J-40 from Narda-ATM is a RF Variable Attenuator with Frequency 17 to 18.6 GHz, Attenuation Range 40 dB, Power 7 W, Peak Power 64.77 dBm, Insertion Loss 0.75 dB. Tags: Module with Connectors, Continuously Variable, Rotary. More details for AF077J-40 can be seen below.