The DA6-60 from Weinschel Associates is a Digital Variable Attenuator that operates from DC to 6 GHz. It has an attenuation range of 60 dB with a 0.5 dB step size and a switching speed of 100 ns. This bidirectional attenuator can handle an input power of up to 0.3 W and has an insertion loss of less than 9 dB. It is powered via USB and supports USB 2.0, RS-232, and 802.11 wireless interfaces for programming. The attenuator is available in a module that measures 57.2 x 14.2 x 57.2 mm and has SMA connectors.