Position-velocity diagram of PV Cep around the 1.644 μm [Fe ii] line in the H-band. The continuum has been subtracted. The radial velocity on the X-axis refers to the [Fe ii] line and it is computed in the LSR. [Fe ii] blue- and red-shifted high- and low-velocity components as well as the Br 12 position are marked. The distance from the source is indicated on the Y-axis. The YSO position was derived through a Gaussian fit to the continuum before its removal from the spectral image. Positive distance is computed northwards (along the blue-shifted lobe direction). The contour levels of the spectral image are 3, 10, 20, 30, 40, 50, and 60 ×  the standard deviation to the mean background.