The present invention relates to a method for evaluating an output signal of a Device Under Test, wherein said Device Under Test outputs said output signal in response to an input signal provided by an Automated Test Equipment, said method including the steps of: generating a difference signal representing the difference between said output signal of said Device Under Test and a reference signal, integrating said difference signal during a clock period respectively, resulting in an integrated difference signal, and evaluating said integrated difference signal with regard to a bit level to be assigned to said output signal of said Device Under Test during the respective clock period.