This paper concerns the evaluation of the non-linear system comprising a linear dynamic element embedded between two zero-memory non-linear elements. Previous work on the evaluation of non-linear systems has centred on the use of random inputs associated with analysis in terms of kernels, and has not been applied to this configuration. An alternative approach has been investigated in which the response of the output to a single input pulse is measured for pulses of several amplitudes. The resulting technique has yielded successful evaluation of several such systems in a computer simulation.