Comparison of the mean flux densities reported in this paper with those obtained from the fitted spectral indices in Bilous et al. (2016). Blue dots: pulsars fitted with at least one turnover in their spectrum. Red triangles: pulsars fitted with a single spectral index. The line of equal flux values is shown by a green dashed line. In order to maintain symmetry between the two axes, we take a range from 50 to 200% of the equal flux value (green area) for the systematic error.