Lab Brick LDA-203 Digital Attenuators is a bidirectional 50 Ohm RF step attenuators operating from 1 to 20 GHz. A simple connection to a USB host provides DC power and control. No additional DC supply voltage is required. Lab Brick Digital Attenuators are easily programmable for fixed attenuation, swept attenuation ramps or run custom attenuation profiles directly from the included GUI. Lab Brick Digital Attenuator Windows®/Linux API dll's and LabVIEW compatible drivers are also available for custom programming applications.