Patent ID: 6794857
Filing Date: 2004-09-21
Classification: G01R

Abstract:
A phase delay characteristic measuring apparatus for measuring a phase delay of a tested device based on phases of an input signal input into the tested device and an output signal output from the tested device, comprising:an in-phase component calculating means for outputting a correlation value between input sampling data of the input signal and the output signal and ideal sine waveform data as a baseband I signal (in-phase component); a quadrature component calculating means for outputting a correlation value between the input sampling data of the input signal and the output signal and ideal cosine waveform data as a baseband Q signal (quadrature component); a phase angle calculating means for outputting phase angles of the input signal and the output signal based on the baseband I signal (in-phase component) and the baseband Q signal (quadrature component); and a phase delay calculating means for calculating an amount of phase delay of the tested device from the phase angles of the input signal and the output signal.