IFD400 Series Pilot Guide
1-10 System Overview
Starting in the top left corner and working counter-clockwise
around the bezel, the IFD has:
Power/Volume/Squelch knob † or Power Button *
Frequency Swap dedicated button †
Three (3) Line Select Keys (LSKs) that are page
dependent with soft key labels adjacent to each
Dual concentric rotary knob as a means of manually
tuning communication and navigation frequencies †
Mechanical cam latch access hole for installation
Page keys along the bottom
USB port for database updates, datalog downloads,
software updates, and powering USB devices in-flight
Dual concentric rotary knob that is page dependent
Four (4) dedicated function keys consisting of:
o Direct-To (“─D─>”)
o Procedure (“PROC”)
o Enter (“ENTR”)
o Clear (“CLR”)
CDI Navigation Source knob † or GPS/OBS Button *
Ambient Light Sensor
* Applicable only to the IFD410
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