The 75P-163 from JFW Industries is a RF Variable Attenuator with Frequency DC to 1 GHz, Attenuation Range 63.75 dB, Attenuation Step 0.25 dB, Power 0.5 W, Insertion Loss 0.75 to 2.2 dB. Tags: Module with Connectors, Programmable, Digital, Computer Controlled. More details for 75P-163 can be seen below.