Changes in the SED with changes in some of the basic parameters of the basic model. In all cases, z₀ = 50r_g = z_acc, p = 1.5, and Γ_jet = 10. The upper panels, from left to right, show models with z_max = 10³z₀ but differ in the value of the magnetic field at the base of the acceleration region: B(z_acc) = 1.8 G and B(z_acc) = 0.06 G, respectively. The models in the lower panels differ in the extension of the acceleration region: z_max = 10⁴z₀ and 10²z₀, respectively. In both cases B(z_acc) = 0.06 G.