HP (Hewlett-Packard) 8082A is a versatile 250 MHz dual channel pulse source with variable leading and trailing edge transition times as fast as 1 ns. It also has variable pulse frequency, delay, width, offset, and amplitude. The normal/complement relationship and the polarity of either output can be reversed. Single pulse, double pulse, and square wave operation are available. Four trigger modes, normal, external trigger, gate mode, and external width, allow for precise control of the output pulses.