This invention is directed to real time detection of occurrence of a transfer error and feedback of the detection result to a printing apparatus in consideration of a possible risk that a signal transfer error occurs on a transfer path that becomes longer as the printhead is elongated. The present invention combines flight safety critical sensors into a common platform to permit autonomous or semi-autonomous landing, enroute navigation and complex precision approaches in all weather conditions. In some embodiments, the split is performed for the purpose of finding the quickest route to the intersection at the end of the constraints. The electrical current can be directed through the conductor at any time prior to data transfer or during data transfer. The circuit of this invention uses active transistor pull-down and pull-up mechanisms.