Patent ID: 7262627

Claim:
A measuring apparatus that measures a waveform of an output signal output from an electronic device, comprising: a strobe generating section that generates a first strobe signal and a second strobe signal having a phase different from that of the first strobe signal in synchronization with the output signal; a strobe shifting section that sequentially changes a phase of the first strobe signal and a phase of the second strobe signal whenever the electronic device outputs the output signal multiple times; a first timing comparing section that acquires a signal level of the output signal at each phase of the first strobe signal by the multiple times; a second timing comparing section that acquires a signal level of the output signal at each phase of the second strobe signal by the multiple times; a first counter that counts the number of times by which the signal level of each output signal acquired by said first timing comparing section is a High level for each phase of the first strobe signal; a second counter that counts the number of times by which the signal level of each output signal acquired by said second timing comparing section is a Low level for each phase of the second strobe signal; and a fail memory that stores the number of times counted by said first counter and the number of times counted by said second counter.