KT74 Mode S Transponder Operating Manual 01115-00-AA 26 July 2013 Honeywell Bendix/King, 9201-B San Mateo Blvd.
EN Front Panel Display The display shows the operating mode of the transponder, the reported pressure altitude, and the current squawk code and Flight ID. The reply indicator is active when the transponder replies to interrogations. The pressure altitude is displayed as a Flight Level, which is the pressure altitude in hundreds of feet. When non-standard atmospheric conditions apply, this may not match the altimeter indicated altitude, but will be correctly displayed by the ATC radar.
VFR FUNC ENT “Squawk Ident”. This activates the SPI pulse in the transponder replies for 18 seconds. IDENT will appear in the display. Pressing the VFR button sets the transponder to the preprogrammed conspicuity code. Pressing the button again restores the previous squawk code. Pressing the VFR button whilst in Flight ID edit changes the Flight ID to the pre-programmed ID set up during configuration of the transponder.
EN press the ENT button to accept and advance to the next digit. The flight ID is terminated with an “space ” character located on the 7 button. When ENT is pressed on the end space, the new Flight ID will replace the previous value. If a button is not pressed for 7 seconds, the changes are ignored and the previous code restored. The Flight ID should correspond to the aircraft call sign entered on your flight plan. If no flight plan is active, the aircraft registration should be used as your Flight ID.
Fault Annunciation If the transponder detects an internal failure, the screen will indicate FAULT and a brief statement of the problem. No replies will be made to interrogations when a fault is detected. Some FAULT indications can be recovered by switching the transponder off and back on again, although in all cases a FAULT code implies that there is a fault with the transponder or the installation.
Warnings The following warnings may appear on the transponder display. Message Antenna Fault Output Power Low No ADSB Position Issue Description The transponder has detected that there is a fault in the antenna cabling or antenna connection. The transponder has detected that it transmitted at a lower power level than expected. This may be caused by a) poor antenna connection in the transponder tray, b) poor antenna cable connections or c) a transponder hardware fault.
Faults The Transponder will not continue to operate when a fault condition is present and one of the following messages appears on the display.
Honeywell Bendix/King, 9201-B San Mateo Blvd.
