Abstract: In one embodiment, a method is provided. In the method of this embodiment, a stimulus signal set may be generated and supplied, as input, to first circuitry. Each respective stimulus signal in the stimulus signal set may be generated based at least in part upon a respective non-null subset of an input signal set. No two respective stimulus signals in the stimulus signal set may be generated based upon the same respective non-null subset of the input signal set. The stimulus signal set may include a respective number of stimulus signals that is greater than a respective number of input signals in the input signal set. Of course, many modifications, variations, and alternatives are possible without departing from the method of this embodiment.