Patent ID: 6943563
Filing Date: 2005-09-13
Classification: G01R,H04B

Abstract:
1. A method for measuring scattering parameters of a device under test (DUT) comprising the steps of: providing a stochastic modulated signal as a power tone signal; providing a probe tone signal with a power level substantially less than the power tone signal; combining the power tone signal and the probe tone signal to provide a composite signal; providing the composite signal to the DUT and as a first input to a receiver, the receiver having a narrow measurement bandwidth relative to a bandwidth of the power tone signal; providing a signal from the DUT to a second input of the receiver; and determining an S-parameter measurement for the DUT using the first and second signals input to the receiver, wherein the probe tone signal does not increase power from the DUT more than 0.2 dB relative to power provided when the power tone signal is provided to the DUT without the probe tone signal.