Predicted synthetic spectrum of H₂ in 3C 326 N obtained for the fiducial model (n_H = 10 cm⁻³, b = 0.1, and G₀ = 10). The specific intensities of the strongest 1000 emission lines are shown as functions of the redshifted wavelength for z = 0.089. We applied the relations described in Sect. 5.3 for the resolving power of the NIRSpec and MIRI instruments. Outside the validity wavelength range, we fixed the resolving power to a value of λ/Δλ = 2500. The NIRSpec and MIRI bandwidths correspond to the black solid lines. The wide-, medium-, and narrowband filters for NIRCam and MIRI are shown as gray and colored bars. Pure rotation lines are indicated in blue, while ro-vibrational transitions are shown in red and green.