Evolution of the Paα emission line (upper subplots) and corresponding differential phase (Δϕ, lower subplots) as a function of the wavelength radial velocity for different models of aligned CB-SMBH system. Common clouds’ orbital elements are designed by subscript c. 𝒞 stands for the coplanar CB-SMBH system. ℑ = 𝒰(l, r) stands for inclination ranges from 𝒰(−l, l) up to 𝒰(−r, r). (a) i₀ = 45° ;𝒞, Ω_k = 100°, ω_k = 110°, e_k = 𝒰(0.05, 0.1 − 0.4, 0.45), k = 1, 2, δe_k = 0.1; i_c = 𝒰(−5° ,5° ), Ω_c = 10°, ω_c = 180°, , (b) i₀ = 45°; i_k = 𝒰(0° ,45° ), δi_k = 5°, Ω_k = 100°, ω_k = 110°, e_k = 𝒰(0.05, 0.1 − 0.4, 0.45), δe_k = 0.1, k = 1, 2, i_c = 𝒰(−5° ,5° ), Ω_c = 10° ,ω_c = 50° ,e_c = 0.25, (c) i₀ = 45°;i_k = 𝒰(0° ,45° ), δi_k = 5°, Ω_k = 100°, ω_k = 110°, e_k = 𝒰(0.05, 0.1 − 0.4, 0.45), δe_k = 0.1, k = 1, 2, i_c = 𝒰(−5° ,5° ), Ω_c = 10°, ω_c = 50° ,e_c = 0.45, (d) i₀ = 𝒰(10° ,45° ), δi₀ = 5° ;𝒞, Ω_k = 100°, ω_k = 110°, e_k = 𝒰(0.05, 0.1 − 0.4, 0.45), δe_k = 0.1, k = 1, 2; i_c = 𝒰(−5° ,5° ), Ω_c1 = 200°, ω_c1 = 150°, Ω_c2 = 10°, , (e) i₀ = 𝒰(45° ,10° ), δi₀ = −5° ;𝒞, Ω_k = 100°, ω_k = 110°, e_k = 𝒰(0.05, 0.1 − 0.4, 0.45), δe_k = 0.1, k = 1, 2, i_c = 𝒰(−5° ,5° ), Ω_c1 = 200°, ω_c1 = 150°, Ω_c2 = 10°, ω_c2 = 180° ,e_c = e_k, (f) i₀ = 45° ;𝒞, Ω₁ = 200° ,Ω₂ = 100, ω₁ = ω₂ = 110°, e_k = 0.5, k = 1, 2; 𝒥 = 𝒰(5° ,45° ), δ𝒥 = 5°, Ω_c1 = 200°, ω_c1 = 150°, Ω_c2 = 10°, ω_c2 = 180° ,e_c = 0.5.