The 50PA-130-XX from JFW Industries is a RF Variable Attenuator with Frequency 200 MHz to 3 GHz, Attenuation Range 127 dB, Attenuation Accuracy 0.6 dB, Power 0.1 to 0.32 W, Insertion Loss 6.5 dB. Tags: Rackmount, Programmable, Multi-Channel, System, Digital, Computer Controlled. More details for 50PA-130-XX can be seen below.