Patent ID: 6114858
Filing Date: 2000-09-05
Classification: G01R

Abstract:
A method for determining noise factor of a device under test (DUT) comprising the steps of:applying a TEST signal as input to said DUT wherein said TEST signal concurrently has a first power P.sub.H within a first frequency band and a second power P.sub.C within a second frequency band, wherein said first and second frequency bands span differing frequency ranges of said test signal such that said DUT produces an OUTPUT signal in response to said TEST signal, wherein said OUTPUT signal has a third power P.sub.HO within said first frequency band and has a fourth power P.sub.CO within said second frequency band,measuring said third power P.sub.HO and said fourth power P.sub.CO of said OUTPUT signal; andcomputing a noise factor as a combination of values of said first power P.sub.H, second power P.sub.C, third power P.sub.HO and fourth power P.sub.CO.