USB has now successfully replaced aging serial and parallel ports as the connection of choice for both device manufacturers and end users. Whereas cable length and device expansion were limitations with older serial and parallel connections, they are no issue for USB. Amazingly, it allows devices to exist up to 30 meters away from the host, and allows up to 127 devices to be connected to a single host and port at once through a series of USB hubs. The ability to talk directly to devices or to devices through hubs allows for this incredible expansion capability.

This application note provides an overview of Agilent’s Infiniium USB test option.