Patent ID: 8879611

Claim:
A method of testing a receiver to measure an intermodulation tone using a built-in self-test system, the method comprising: generating a test signal using a stimulus generator, the test signal comprising first and second tones at respective first and second frequencies, wherein the first and second frequencies are spaced by an offset frequency, wherein the first frequency comprises a non-integer multiple of the offset frequency, wherein a receiver downconversion mixer frequency comprises an integer multiple of the offset frequency, and wherein the offset frequency coincides with an intermodulation frequency of the intermodulation tone; applying the test signal to a downconverter of the receiver to downconvert the test signal to generate an In-phase component and a Quadrature component; and demodulating, in a demodulator of the receiver, the In-phase and Quadrature components based on a reference frequency to measure an amplitude of the intermodulation tone, wherein the stimulus generator, the downconverter, and the demodulator are disposed on a common receiver chip.