[en] The method for identification of single peaks in spectra of high resolution magnetic-resonance mass-spectrometers by introducing the calculational reference point is suggested. It is suggested to determine the nuclear magnetic resonance frequency in the magnetic field given simultaneously with the measurement of the cyclotron frequency of the ion investigated. The comparison of cyclotron frequencies of various ions is carried out by a modulator, and the generator feeds high-frequency voltage to it. Mass-spectrum unfolding occurs when the generator frequency changes