It eats, to detect the characteristics of signals in DUT

摘要

Automatic test equipment (ATE) includes: a kind of circuit, is used to stimulus signal, is the first signal and the second signal from (DUT) is devices under both comprising certainty and random (noise floor) spectral content; First channel receives the first signal, wherein the first channel, which adds the first noise floor, generates the first channel signal to the first signal; Second signal is received on second channel, wherein the second channel, which increases by the second noise floor, generates the signal of the second channel to second signal, the first noise floor, second noise floor and above-mentioned DUT noise floors be all be mutually it is uncorrelated; With processing logic, with: the first power of the deterministic excitation signal is estimated, to estimate that the second general power is based on the first channel signal and the second channel signal.