Abstract: A measuring apparatus for measuring a vehicle wheel alignment characteristic, such as camber, includes a transducer mountable with respect to a vehicle wheel. The transducer has a movable arm repetitively driven along its path of travel to and away from a first predetermined position. Its presence is sensed only at the first predetermined position, the alignment characteristic of the wheel being a function of the time the arm is present there. The transducer generates a digital signal having a duty cycle characteristic of the value of the alignment characteristic being measured. The amount of time the digital signal is in a first state is digitally recorded, as is the amount of time the digital signal is in the opposite state. The value of the alignment characteristic is digitally determined as a function of the two digitally recorded times.