The AT-CD00-HD from UMCC is a RF Variable Attenuator with Frequency 1.5 to 3 GHz, Attenuation Range 0 to 60 dB, Attenuation Step 0.25 dB, Power 1 W, P1dB 30 dBm. Tags: Module with Connectors, Programmable, Digital, Computer Controlled. More details for AT-CD00-HD can be seen below.