scope:

- This specification contains requirements for a remote (radio) control system for operating and controlling airport visual aids systems from the airport control tower. The requirement is for a switch assembly cabinet, a switch assembly panel, an encoder interface unit, a transmitter, a receiver, and a decoder unit to interface with visual aids lighting control systems. The encoder shall be pushbutton actuated and installed in the airport control tower for modulating the transmitter frequency. The receiver and decoder units shall be installed in the proximity of each associated visual aids lighting control system.