The 3494-64 from KRATOS General Microwave is a RF Variable Attenuator with Frequency 4 to 8 GHz, Attenuation Range 64 dB, Attenuation Step 0.25 dB, Power 0.01 W, Insertion Loss 2.4 dB. Tags: Module with Connectors, Programmable, Digital. More details for 3494-64 can be seen below.