Patent ID: 8645091

Claim:
A method for evaluating signal (S NE ) at a point of interest on a signal path, said method comprising: calculating, by a processor of a computer system, the signal (S NE ) at the point of interest on the signal path, wherein the signal path is a first spatial path, wherein the point of interest is a first spatial point on the first spatial path, wherein said calculating comprises applying an inverse transfer function (iG) for the first spatial path to an argument of a signal (S FE ) measured at a second spatial point on the first spatial path, wherein the first spatial point and the second spatial point are different spatial points on the first spatial path, wherein the signal (S NE ) and the signal (S FE ) are represented as a respective time domain variable, wherein the signal (S NE ) has a frequency exceeding 1 GHz, wherein said calculating is performed by a time domain evaluation process that operates in test equipment for electrical devices, and wherein the first spatial point on the first spatial path is on a device under test (DUT); and said processor transferring the calculated signal (S NE ) to an output device of the test equipment.