Model of outermost synthesized beam 70: in (a), as a function of RA and frequency. The intended main beam is indicated with an arrow. The discontinuities in the sidelobes occur when the beamforming switches to a different TAB. In (b), as function of RA and Dec. The colours indicate frequency, where white means an SB is sensitive over the full frequency range. Only the main beam in (b) is broadband, the sidelobes are not.