The 50PA-665 from JFW Industries is a RF Variable Attenuator with Frequency DC to 18 GHz, Attenuation Range 81 dB, Attenuation Step 1, 2, 4, 4, 10, 20, and 40 dB, Attenuation Accuracy 0.3 to 1.6 dB, Power 1 W. Tags: Rackmount, Programmable, Multi-Channel, System, Digital, Computer Controlled. More details for 50PA-665 can be seen below.