Installation manual
1-2 System Overview 
INTENDED FUNCTION 
The Avidyne IFD540 is a GPS-nav-com radio whose primary 
function is to conduct nav-com tuning and communication, and 
serve as the principal navigation sensor/system for all IFR VHF 
(“VLOC”) and GPS-based navigation and instrument flying 
(enroute and approach), provided it is either installed in the 
“primary field of view” or is connected to an external CDI/HSI 
indicator that is installed in the “primary field of view” as well as a 
remote source selection annunciator.  
Supplemental functions include serving as a moving-map flight 
management system (FMS), and electronic charts and checklists 
along with a number or timer and calculator types of utilities.  
FUNCTIONAL OVERVIEW 
The Avidyne IFD540 Integrated Flight Display (IFD) system 
supports the following functions: 
  Flight Management System (FMS) 
  WAAS and non-WAAS GPS Navigation 
  VHF Radio Nav/Com (16W and 10W variants) 
  Moving Map 
  Terrain  Awareness  and  Forward  Looking  Terrain 
Alerting 
  Weather Datalink and Lightning sensor depictions 
  Traffic 
  Electronic Approach Plates 
  Electronic Checklists 
  Data Logging 
  Caution Advisory System (CAS) 
  Utilities (e.g. Schedulers, Timers, Calculators) 
  Multi-touch Touch screen Control 
  Multiple IFD Operations 










