Quantities derived from our simplified jet model. The magnetic field B and electron density N (dashed and solid black lines) are shown as a function of radial distance from the jet origin, normalized to their values at 10^-1 pc; the Lorentz factor, Γ, (dotted line) is shown unnormalized; the jet brightness at 100, 250, and 300 GHz (blue, green, and red lines) is shown normalized to the brightness peak at 100 GHz. Left, a fitting model obtained assuming that the emission comes from the conical (i.e., free) jet region. Right, a fitting model assuming that the emission comes from the concave jet region. See text for details.