Radial PV diagrams (top) and the deviations of the rotation curves measured with SLAM from the best-fitting Keplerian rotation curves (bottom) for the synthetic ¹³CO observations of the ﹩{\dot{M}}_{{\rm{in}}}=1{0}^{-7}\,{M}_{\odot }\,{{\rm{yr}}}^{-1}﹩ (left) and 10⁻⁶ M_⊙ yr⁻¹ (right) models. Both models exhibit a characteristic PV wiggle as well as a nondisk kinematic feature near r ≈ 600 au. As the infall rate increases, the PV diagram becomes increasingly asymmetric owing to the combined effects of disk eccentricity and disk warping.