What are C 1, C 2, C 3, C 4 in the following diagram of the quadruplex system?

What are C 1, C 2, C 3, C 4 in the following diagram of the quadruplex system? Correct Answer Computer

The signal from the lane passes through the voter and consolidator for cross comparison of signals. These signals are then passed on to the computer which applies control laws and calculates the amount of deflection required by the actuator. The signal passes through another set of voter and consolidator for errors before passing to on to the actuator.

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