Digital broadcast wave analyzing apparatus

Disclosed is a digital broadcast wave analyzing apparatus capable of preventing the measured result from varying depending on a measurer and easily corresponding to a variation inmultipath characteristics. An embodiment of the invention provides a digital broadcast wave analyzing apparatus that receives an OFDM digital broadcast wave, detects a symbol timing from the received signal, extracts signal strings from a signal string of the symbol at predetermined window positions, and performs a process required to analyze the digital broadcast wave on the extracted signal strings. The apparatus includes: an optimum window position selecting unit 31 that extracts signal strings from a signal string of a symbol for the signal that is received at a specific timing at a plurality of different predetermined window positions, calculates the modulation error ratio of each of the extracted signal strings, and selects a window position where the highest modulation error ratio is obtained as an optimum window position. A process of calculating a delay profile is performed on the signal string that is extracted at the selected optimum window position.