DATA LINK ACCESS FOR AIRCRAFT SYSTEM
ACARS AVIONICS DEVELOPED SINCE 1990 PROVIDE OTHER AIRCRAFT COMPUTER DATA SUCH AS PERFORMANCE MONITORING AND FLIGHT MANAGEMENT SYSTEMS ACCESS TO AIR GROUND DATA LINK
AIR GROUND PROTOCOL AND MODULATION SCHEME IS SPECIFIED IN AEEC SPECIFICATIONS 618 “AUR/GROUND CHARACTER ORIENTED PROTOCOL SPECIFICATION”
CHANNELS USED IN THE AERONAUTICAL MOBILE EN-ROUTE SERVICE OR AM(R)S 118-137 MHz
EACH CHANNEL HAS 25 KHz BANDWIDTH