The LDA-203 is a USB Controlled Digital Attenuator that operates from 1 GHz to 20 GHz. It has an attenuation range of 63 dB with a 0.5 dB step size. The attenuator is powered and controlled by connection to a PC or a self-powered USB hub. It can be programmed to have a fixed attenuation or swept attenuation ramps using an easy to use GUI Software. It can be used for ATE applications, WiMAX, 3G, 4G, LTE, DVB Fading Simulators and in production test labs.