scope:

This document presents MOPS and test procedures for Aircraft Very High Frequency (VHF) Digital Link (VDL) Mode 2 physical link and network layer protocol components of an avionics transmitter/receiver (transceiver). These transceivers are intended for air-ground (A-G) data communications. Equipment certified to standards in this MOPS will be compatible with the relevant Minimum Aviation System Performance Standards (MASPS) in RTCA DO-224C, Signal-in-Space Minimum Aviation System Performance Standards (MASPS) for Advanced VHF Digital Data Communications Including Compatibility with Digital Voice Techniques, and with the International Civil Aviation Organization (ICAO) VDL Mode 2 Technical Manual. Compliance with this MOPS is one means of assuring that the VDL Mode 2 equipment will function satisfactorily under all conditions normally encountered in the air traffic control A-G operations and that data formats will be compatible with the Aeronautical Telecommunication Network (ATN).

The key improvements provided in this revision are the addition of test procedures for multi-frequency related operations that are required in DO-224C. Some of these test procedure additions include frequency support list tests, ground requested aircraft initiated handoff tests, aircraft initiated handoff tests and ground initiated handoff tests.