Upper panel: spectrum of CD-30°11223 coadded from 175 RV-corrected spectra taken with SOAR/Goodman. The hydrogen Balmer series is clearly visible, as well as a prominent helium line at 4026  Å. The other features are rotationally broadened metal lines. Model spectra were matched to the hydrogen and helium lines to determine the atmospheric parameters of the hot subdwarf star. Middle panel: trailed spectra taken with SOAR/Goodman and showing the short-period sinusoidal variations of the Doppler-shifted spectral lines caused by the motion of the visible sdB star. The close and compact white-dwarf companion of the subdwarf star is not visible in this dataset. Lower panel: radial velocity curve of CD-30°11223 derived from 105 spectra taken with WHT/ISIS plotted twice against orbital phase for better visualisation.