Ranges of the modelled global spectrum of M 82-like galaxy as affected by increasing and decreasing best-fit model parameters , , and by ±20%. Black solid circles denote literature data used during modelling including the interpolated flux density at 150 MHz from the MSSS survey. For the sake of completeness data from the individual MSSS sub-bands (brown rectangles) and flux densities determined during commissioning phase of the 42-element Allen Telescope Array (Williams & Bower 2010) (orange triangles) are also shown.