Ratio between the number of sources with a ‘good’ redshift measurement (see Sect. 5 for details) and the total number of objects (in percent) as a function of the integrated flux of the observed Hα+[N II] emission complex in the simulated spectra for type 1 (black filled symbols) and type 2 (red pentagons) AGN. The dashed and dot-dashed lines mark the 50th and 90th percentiles, respectively.