> Fault error diagnosis

> To perform fault error diagnosis choose Design Error Diagnosis from Mode menu.

> Program generates fault in a randomly chosen point of the design. It could be stuck-at 1 fault or stuck-at 0 fault. Your task is to try to find that fault. There are two ways to do it.

> First way to do it is by clicking signal values. Program will mark the point with a fault signal. This way we can determine the fault most accurately.

> The second way is to minimize the number of possible faults until there are just one or few left. Use mouse, UP, DOWN, CTRL and SHIFT buttons to choose testpattern or set of testpatterns.

> When a testpattern is chosen the possible faults detected by the pattern are depicted in a design window (red meaning the stuck-at 1 fault and green meaning stuck-at 0 fault). Next step is to choose testpattern or set of testpatterns to eliminate those possible faults using mouse, UP, DOWN, SHIFT and CTRL keys.

> To determine the best possible accuracy of diagnosis choose all testpatterns. If there are more than 1 faults left and there and there is a possibility to detect each of them you should go back to the vector input mode to add the needed patterns and then perform the fault simulation.