BENDIXKing AeroNav 910 Pilot's Manual page 46

AeroNav 900/880 Series Pilot's Guide
Transponder Keyboard
Transponder Code Entry
To enter a transponder code using a keyboard, touch a
transponder mode/code datablocks to display a transponder
keyboard, then enter the code. The new code is set after the
fourth digit is entered. If an incorrect digit is entered, press the
CLR button as required to backspace through the code. If the
code entry is started, three seconds of inactivity will cause the
keyboard to be dismissed and the original code will be restored.
Transponder code can also be entered using the lower left knob.
First, press the knob until the transponder tuning data is
displayed in the upper left corner of the display. Then rotate the
knob until the desired code is shown. The outer knob adjusts the
first two digits and the inner knob adjusts the second two digits.
During entry, the code will be highlighted. The new code will be
set once the highlighting is removed. †
Transponder Mode
To change the transponder mode, touch the key with the desired
mode

ALT - The transponder will respond to all interrogations

ON - The transponder will respond to all interrogations,
but altitude reporting is suppressed
1-36 System Overview
89000039-010
Rev 1 May 2019