A window cladding assembly that fits on the inside of an awning or casement type window unit to cover from view the frame of the window unit and the perimeter of the window unit sash. A caulking portion to be caulked onto the outer end face of the inner ring is formed on the shaft body. Namely, when the pilot signal is used as the control signal, even in the vacant period, measurement of the link quality of the forward link with the pilot signal is performed in the mobile station to report the result of measurement to the base station. The handle is then pulled, and the cam levers undock the blade module from the chassis.