Results of the application of the LSDBinary algorithm to artificial in-eclipse spectra of the RZ Cas binary system. Top block: LSD profiles of the primary (red) and secondary (black) components. Bottom block: LSD-based model spectra (red) overlaid on the input ‘observed’ spectra (black) of the system. In each of the blocks, rows correspond to different values of the resolving power (from top to bottom, R = 60 000, 25 000, and 5000), while columns reflect the change in S/N of the spectrum (from left to right, S/N = 120, 80, and 40).