2D continuum subtracted spectrum of NGC 4569 zoomed on the Hα and [NII] lines (left) and on the [SII] doublet (right), as obtained at Calar Alto with a slit of width 1.2 arcsec positioned along the minor axis on the spur of ionized gas as indicated in Fig. 6. The red labels shown in the left panel correspond to those shown in Fig. 6 and indicate the range of pixels used to extract 1D spectra to derive the physical parameters given in Table 2. The blue vertical arrow shows the mean recessional velocity of the galaxy (−221 km s^-1) derived from HI data.