Extra 300S - Air;Ground Switching; Function Display; Programming Mode

Section 917
BENDIX/KING KT 76A Transponder
917 - 6 Page Date: 31. January 2006
Pilot´s Operating Handbook
EXTRA 300S
BRT
When in TST mode, rotating the BRT knob (= 4th ATCRBS Code Selector Knob) will manually
adjust the display brightness. Clockwise rotating will increase display brightness and
counterclockwise will decrease display brightness. The brightness of the display is determined
by a photocell relative to the programmed or manual adjusted brightness level.
917.1D FUNCTION DISPLAY
'FL'
When the ALT mode is selected, the letters 'FL' will be illuminated. The pressure altitude data
supplied to the KT 73 is displayed in hundreds of feet (i.e., Flight Level) on the left side of the
display, the altitude window. In addition the ID code is displayed in the right window, the ident
window. A fault in the altitude interface or an invalid altitude input to the KT 73 will cause the display
to show a series of dashes when the ALT mode is selected.
'SBY'
'SBY' is displayed in the altitude window when SBY mode is selected by the Function Selector
Knob. In addition the ID code is displayed in the right window, the ident window.
'GND'
'GND' is only displayed on the left side (altitude window) when the aircraft is on ground. The ID
code is shown on the right side, the ident window.
'FLT IDT'
The 'FLT IDT' is annunciated and the flight ID is illuminated in the display area when the FLT ID
mode is selected by the Function Selector Knob.
'TEST OK'
'TEST OK' is displayed in the Test mode if no faults are detected.
'SBY FXYZ'
If one or more fault is detected in the Test mode, 'SBY' is displayed in the altitude window and the
ident window will cycle through all detected faults indicated by 'FXYZ'. The 'XYZ' denotes the
specific fault.
917.1E PROGRAMMING MODE
The programming mode is normally set at time of installation, including the unique Mode S aircraft
address. The programming mode should not be used during flight. Refer to the KT 73 Installation
Manual 006-10563-0004 latest revision.
917.1F AIR/GROUND SWITCHING
The AUTO GND (Automatic Ground Programming) function is not available.