Unreduced readout frame from the IPS of Antares (α Sco), recoloured and contrasted to demonstrate positions of the spectra and the effects of chip imperfections. The AWG dispersion was in the vertical direction, with the cross-dispersion in the horizontal direction. This permits the decoupling of the multiple input signals, as well as the higher AWG diffraction orders. The twelve individual fibre spectra are thin diagonal lines with a small gap separating the higher diffraction orders. The horizontal features running through the frame are caused by imperfections (such as dust and flakes) on the AWG’s output facet, which cause scattering. These features were removed by dividing by the instrument flats.