An integrated circuit includes a detector configured to monitor a high-drive signal and a low-drive signal that drives a high-side switch and a low-side switch respectively of an integrated circuit switching regulator. The printer creates small dots in the course of the backward movement of the head, and medium dots in the course of the forward movement of the head. The vertical and horizontal components of the linearly polarized signals and the vertical and horizontal components of the circularly polarized signals are separated by the antenna feed apparatus and applied to the input of the downconverter of this invention. At least a first sensor is disposed adjacent to the housing and orientated to detect the presence of a shutter disk mechanism within the housing. The tilting device is provided substantially in a pupil plane of the projection system.