Patent ID: 6567762
Filing Date: 2003-05-20
Classification: G01R

Abstract:
An apparatus for extending the dynamic range of measurements performed on a device under test, the apparatus having an apparatus input port that accepts an input signal from a source and an apparatus output port that delivers an output signal to a measurement processor, the apparatus comprising:a signal splitter having a splitter input, a first splitter output and a second splitter output; a cancellation path having a cancellation input connected to the first splitter output of the signal splitter and a cancellation output; a test path having a test input connected to the second splitter output of the signal splitter and a test output, the test path providing for the insertion of the device under test; and a signal combiner having a first combiner input connected to the cancellation output of the cancellation path, a second combiner input connected to the test output of the test path and a combiner output, wherein the signal splitter is located between the apparatus input port and the cancellation and test inputs, and wherein the signal combiner is located between the cancellation and test outputs and the apparatus output port.