ARINC 720-1

This document sets forth the air transport industry’srecommended standards for a digital frequency selection (DFS)system.

Information transfer by means of ARINC Specification 429, “Mark33 Digital Information Transfer System (DITS),” is assumed for theDFS System.

With the exception of navigation receiver controls, most of thefrequency and function selection systems in the past were federatedsystems, i.e., one control unit per receiver. Available technologyand the 2X5 tuning method made federated systems attractive.However, application of digital technology and interfaces permitvarious degrees of control integration in newer systems.

This document addresses two opposite ends of the DFS integrationpossibilities, i.e., a totally centralized and a federated system.This is necessary to assure that the radio interface specificationsare adequate to cover a range of DFS integration.

It is recognized that actual application of the DFS system willbe between federated and centralized concepts. Typical applicationsdeviating from the basic concepts of Figures 2- 1 and 2-2 areillustrated in Attachment 2.

Edition:

80

Published:

07/01/1980

Number of Pages:

22

File Size:

1 file , 140 KB