TESTING APPARATUS AND TESTING METHOD

摘要

A first transforming unit (50) transforms clock change point information (TC) indicating a change timing of a clock signal (DQS) to information of frequency domain, thereby generating first clock change point frequency information (FC1). A digital filter (52) filters the first clock change point frequency information (FC1) to generate second clock change point frequency information (FC2). A second transforming unit (54) inversely transforms the second clock change point frequency information (FC2) to information of time domain, thereby generating second clock change point information (TC2). A determining unit (20) evaluates, for each of a plurality of phases, a DUT (102) on the basis of the difference data (?T) between a respective change timing indicated by data change point information (TD) and a respective change point timing indicated by the second clock change point information (TC2).