Radio spectrum of MRC 2011-298. Upper panels report the 700 MHz (left) and 9000 MHz (right) images with overlaid an example of the regions used to measure the flux densities of the whole source (blue box), lobes (red ellipse), east wing (green box), west wing (orange box), core (black circle), north jet (cyan polygonal), and south jet (pink polygonal). Middle and lower panels show the spectra obtained for sets of images A, B, C, and D (Table 4). Dashed and solid lines are the fitted power-laws to all data points and to subsets of data points, respectively. Results of the fits are summarised in Table 5.