The 50P-1974 from JFW Industries is a RF Variable Attenuator with Frequency DC to 250 MHz, Attenuation Range 127 dB, Attenuation Step 1 dB, Power 1 W, Insertion Loss 0.27 to 0.80 dB. Tags: Module with Connectors, Programmable, Digital, Computer Controlled. More details for 50P-1974 can be seen below.