ats4dThe ATS4D from CAES is a RF Variable Attenuator with Frequency 2 to 4 GHz, Attenuation Range 60 dB, Insertion Loss 2.5 dB, Supply Voltage 5 V. Tags: Module with Connectors,The ATS4D from CAES is a RF Variable Attenuator with Frequency 2 to 4 GHz, Attenuation Range 60 dB, Insertion Loss 2.5 dB, Supply Voltage 5 V. Tags: Module with Connectors,