Measuring apparatus and measuring method for pattern dependent jitter

A pattern dependent jitter measuring apparatus comprising:

• a clock generating unit which generates a clock signal having a predetermined frequency;
• and
• a pattern generating unit which outputs to a measuring object a data signal, which has a predetermined pattern in which one frame is configured from a predetermined bit length, so as to be synchronized with the clock signal outputted from the clock signal generating unit;
• a waveform information acquiring unit which receives a data signal to be measured outputted from the measuring object as a data signal to be measured and receives the clock signal outputted from the clock generating unit, and which acquires waveform information in a same time domain of the data signal to be measured and the clock signal;
• an averaging processing unit which carries out averaging processing on the waveform information acquired by the waveform information acquiring unit;
• a phase difference detecting unit which determines a per-bit phase difference between the data signal to be measured and the clock signal, based on the waveform information averaged by the averaging processing unit;
• a frequency band limiting processing unit which carries out predetermined frequency band limiting processing on information of the per-bit phase difference obtained by the phase difference detecting unit;
• and
• a measured result outputting unit which outputs as pattern dependent jitter the phase difference information on which the frequency band limiting processing is carried out
• wherein the pattern generating unit is configured to output to the waveform information acquiring unit a frame synchronization signal synchronized with data output timing at an arbitrary bit position in one frame of the data signal;
• and
• wherein the waveform information acquiring unit is configured to acquire a predetermined number of frames of the waveform information of the data signal to be measured and the clock signal by using a timing when the frame synchronization signal is inputted as a standard timing.