Patent ID: 7317999

Claim:
A spectrum processing method whereby a spectrum obtained from signals under test and corresponding to linearly spaced frequencies is brought to correspond to logarithmically spaced frequencies by a measuring apparatus, said method comprising: one step selected from the group consisting of: (i) performing vector averaging on said spectrum selected from said spectra corresponding to linearly spaced frequencies; (ii) selecting said spectrum within a predetermined frequency range from logarithmically spaced frequencies from said spectra corresponding to linearly spaced frequencies and performing vector averaging on the selected spectrum; and (iii) performing vector averaging in terms of frequency on said spectrum corresponding to linearly spaced frequencies while logarithmically increasing the objects of averaging with an increase in frequency, and outputting a processing result of said vector averaging in terms of frequency to an output device, wherein performing vector averaging on said spectrum selected from said spectra corresponding to linearly spaced frequencies comprises performing vector averaging in terms of frequency on said spectrum selected from said spectra corresponding to linearly spaced frequencies, and wherein selecting said spectrum within a predetermined frequency range from logarithmically spaced frequencies from said spectra corresponding to linearly spaced frequencies and performing vector averaging on the selected spectrum comprises selecting said spectrum within a predetermined frequency range from logarithmically spaced frequencies from said spectra corresponding to linearly spaced frequencies and performing vector averaging in terms of frequency on the selected spectrum.