Slices of the Faraday spectrum cube at ϕ = 20 rad m⁻² as a function of Faraday dispersion σ_ϕ, obtained from the injection of the bridge polarised emission model in the data; see text for details. It is evident that the bridge polarised emission decreases as the Faraday dispersion increases until it completely disappears when σ_ϕ = 0.18 rad m⁻². The top left panel is the case where no depolarisation occurs, but only the rotation of the injected signal.