SYSTEM DESCRIPTION

The RRCS provides remote control of airport visual aid lighting systems. The system provides the operator with the ability to control the following functions:
• Switch visual aid lighting systems on and off
• Select lighting intensity levels for appropriate systems
• Switch between ground-to-ground control and air-to-ground control for any or all systems

The RRCS is capable of controlling the following five visual aid lighting systems:
• Medium Intensity Approach Lighting System with Runway Alignment Indicator Lights (MALSR/MALS)
• Omnidirectional Approach Lighting System (ODALS)
• Runway End Identifier Lights (REIL)
• Visual Approach Slope Indicator (VASI)
• Precision Approach Path Indicator (PAPI)

The RRCS system consists of equipment that is functionally divided into two main groups: (1) transmit equipment, and (2) receive equipment.

Transmit equipment consists of:
• One to three switch assembly cabinets, each housing up to five-switch assembly panels. These units are typically located in the air traffic control tower.
• An Encoder Interface Unit (EIU) located in the control tower equipment area. The EIU converts data from the switch assembly panel(s) into a format that can be transmitted.
• A transmitter and antenna, usually located in the control tower equipment area, transmits control commands to the receiving equipment.

Receive equipment consists of:
• A receiver unit that receives control commands from the transmitter through its antenna, demodulates the signal into serial digital data, and sends the data to the decoder unit.
• The decoder unit contains decoding circuitry and relays for actuating system functions that correspond to the switches actuated in the switch assembly panel(s).