Phase-resolved single-pulse amplitude distribution of the PC and MP phase range. We show the mode-averaged 2D amplitude-phase distribution, that is, the number of pulses per flux density and phase bin, displayed on a logarithmic colour scale. The black solid line that peaks near 5 a.u. is the same average pulse profile as shown in Fig. 2, the grey solid line represents the maximum amplitude, and the coloured solid lines are logarithmically spaced contours of the 2D distribution.