Quantic PMI Model No. ATN-30-100M40G-USB is a state-of-the-art attenuator that operates from 100 MHz to 40 GHz. This attenuator is controlled and powered via USB 2.0. This model offers 30dB of attenuation in 1dB steps. The insertion loss is typically 5 dB at 20 GHz and 8 dB at 40 GHz. The package size is 2.25" x 1.0" x 0.33".