Extra 300S - Buttons;Selectors for Other KT 73 Functions

Section 917
BENDIX/KING KT 76A Transponder
Page Date: 31. January 2006 917 - 5
Pilot´s Operating Handbook
EXTRA 300S
0021 The VFR code commonly used in Germany (default is set to 0021 at time of
installation)
7500 Hijack code (Aircraft is subject to unlawful interference)
7600 Loss of communications
7700 Emergency
7777 Military interceptor operations (Never squawk this code)
0000 Military use (Not enterable)
Changing the preset VFR code is done as follows:
Place the unit in SBY
Select the desired VFR code
While holding the IDT button in, momentarily press the VFR button.
Avoid selecting code 7500 and all codes in the 7600-7777 range. These trigger special indicators
in automated facilities. Only the code 7500 will be decoded as the hijack code. An aircraft’s
transponder code (if available) is utilized to enhance the tracking capabilities of the ATC facility,
therefore care should be taken when making routine code changes.
917.1C BUTTONS/SELECTORS FOR OTHER KT 73 FUNCTIONS
IDT
Pressing the IDT (Ident) button while in the GND, ON or ALT mode activates the Special Position
Identification (SPI) Pulse for 18 seconds, identifying your transponder return from others on the
air traffic controller’s screen . The word 'IDT' will appear in the left lower corner of the altitude
window while the IDT mode is active. When the Function Selector Knob in test mode (TST),
pressing the IDT button will return the brightness to the default factory value.
VFR
Momentarily pressing the VFR Pushbutton sets the transponder code to the pre-programmed
VFR code, superseding whatever code was previously entered. Pressing the VFR key again and
holding it for two seconds will restore the previous identification code. When in TST mode pushing
the VFR button will display the software revisions on the Altitude window and Ident window for a
minimum of 4 seconds.
FLT ID
When in FLT ID mode, the flight ID can be entered or modified by rotating the FLT ID knob (= 2nd
ATCRBS Code Selector Knob) to select desired character for each digit selected by the CRSR
knob. Once the CRSR and FLT ID knobs have been idle for 5 seconds or the Function Selector
Knob has been turned to the SBY position the flight ID will be saved.
CRSR
When in FLT ID mode, rotating the CRSR knob (= 1st ATCRBS Code Selector Knob) will position
the cursor under the character of the flight ID to be changed.