Patent ID: 7486067

Claim:
A measurement system for determining at least one characteristic of a device under test (DUT) at at least one frequency, the at least one characteristic being a function of time, the measurement system comprising a network analyzer being in connection at least with generator means for generating a first and second frequency component, at least the second frequency component being offset from the at least one frequency at which the DUT is characterized, the network analyzer further comprising signal paths applying the generated first and second frequency components to the DUT and receiving signals from the DUT, the measurement system obtaining a power sweep or a changing and repetitive load impedance at an input or an output of the DUT, whereby the network analyzer further comprises a data acquisition and processing unit calculating from the received signals from the DUT the at least one characteristic as a function of time and a combination of a source match and an available power or a changing and repetitive load impedance as a function of time, such that the characteristic as a function of time can be mapped to a combination of the source match and the available power or to the load impedance.