Kodak 800 SERIES - Manual (Page 45)

Theory of Operation 2-14
NovaJet 800 Series Service Manual
ENCODER STRIP
OUTPUT OF DETECTOR 2
COMPOSITE TRANSITION-TRIGGERED OUTPUT OF BOTH DETECTORS
OUTPUT OF DETECTOR 1
4 OUTPUT PULSES
PER OPTICAL LINE
DETECTOR 2
DETECTOR 1
Figure 2-9. Quadrature Signal Generation.
The direction that the Carriage Assembly is moving is calculated based
upon the state of one detector’s output and the direction of the transition
of the other detector’s output.