Jitter measuring apparatus

A jitter measuring method comprising the steps of:

• preparing a jitter demodulator which demodulates a jitter component of a digital signal input from the outside;
• preparing a jitter amount detector which detects the amplitude value of a demodulation signal output from the jitter demodulator;
• preparing a display unit for displaying the value detected by the jitter amount detector;
• preparing an interpolator which measures a period of the demodulation signal output from the jitter demodulator and interpolates the demodulation signal processing with a rate corresponding to the measured period;
• preparing a display control section which displays on the display unit a waveform of the demodulation signal interpolated by the interpolator;
• preparing a housing;
• and
• performing assembly after receiving the jitter demodulator, the jitter amount detector, the interpolator, and the contained control section in the one housing and performing assembly after mounting the display unit on an outer surface of the housing.