Patent ID: 7924026
Filing Date: 2011-04-12
Classification: G01R

Abstract:
1. A method of determining a response of a device under test (DUT) to a desired large signal, the method comprising: applying an imperfect large signal, having one or more fundamental frequencies with associated amplitudes and phases, and having at least one unwanted spectral component, to the DUT; measuring a first vector response to application of the imperfect large signal, the first vector response having spectral components measured at each port of the DUT; sequentially applying small signals to each port of the DUT, while continuing to apply the imperfect large signal; for each small signal applied, measuring an additional vector response having spectral components measured at each port of the DUT; subtracting the first vector response from each additional vector response to produce difference vectors; extracting, from the difference vectors, a linearization of a spectral map representing the DUT; determining, using the linearization of the spectral map, a contribution of the at least one unwanted spectral component to the imperfect large signal; and determining a response of the DUT to the desired large signal by subtracting the contribution of the at least one unwanted spectral component from the first vector response.