Cross-band delays between 345 GHz and three selected frequencies (from left to right 5 GHz, 15 GHz and 86 GHz). The top panels (A−C) show the variation in the cross-band delays using a fixed spectral slope of s = 2.5 and the bottom panels (D–F) present the changes in the cross-band delays for a fixed helical magnetic field (b = 1.5). The different values used for d are colour-coded and can be found in the plot legend.