A gas dynamic pressure bearing is disclosed in which dynamic pressure generating grooves in a radial bearing pump out gas toward a thrust bearing, and dynamic pressure generating grooves in the thrust bearing pump in gas toward the radial bearings. The resulting data may be aggregated and sent to a network accounting object. In a fashion corresponding to this, the holder has receptacles that are assigned to the tabs and that are spaced apart from one another, into which the tabs of the collimator plates engage. The first selected signal and the second selected signal are selected from an assortment of reference signals that have distinct relative phases to provide the output pulse width of a desired duration.