The 8012B is an extremely versatile, easy- to-operate pulse generator with a wide range of applications. It has a complete set of variable pulse parameters with a repetition rate of 0—50 MHz and transition times as low as 5ns. This makes it ideal for testing digital logic: RTL, DTL, TTL, some ECL and some MOS can be dynamically tested and noise patterns can be simulated. Any triangular or trapezoidal waveforms can be generated (up to a maximum ratio of 1:100 or 100:1 between leading and trailing edge transitions) over the entire frequency range. The pulse polarity can be set to positive or negative and the pulse output format to symmetrical, normal or complement using front panel switches, without affecting pulse amplitude or offset. The complement format can be used to obtain duty cycles of 100% and symmetrical format provides a means of checking device threshold, driving operational amplifiers and simulating amplifier outputs. The 8012B has a selectable source impedance which makes impedance matching to the circuit under test very simple. It also has a square wave facility that is independent of width and delay settings and a double pulse facility that is useful for testing device recovery times and making noise immunity measure