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This function is only available with S/N 167304-01 and above and software version 1.3.0 marked on the
Indexer nameplate.
Additional Button Press Functions
5.4
5.4.1
Reference Marker
5.4.1.1
Overview
The Reference Marker, a scrolling white LED arrow on the right-hand side of the Indexer
Computer, is used to designate a pilot-selected AoA reference. The flight modes described
below show the typical location to place the Reference Marker for the desired flight condition.
5.4.1.2
Moving the Reference Marker
The two buttons on the side of the Indexer Computer control the movement of the Reference
Marker. A quick press of the top button moves the marker closer to the High AoA side (UP), a
quick press of the bottom button moves the marker towards the Low AoA side (DOWN) of the
display.
5.4.2
Audio Mute*
5.4.2.1
Normal operation is with the LAA audio active (unmuted). To mute the LAA audio, press and
hold the top button for 4 seconds. After 4 seconds, you will hear a beep. This beep confirms
that the audio is now muted.
5.4.2.2
To unmute the audio, press and hold the top button for 4 seconds. After 4 seconds, you will
hear two beeps. Two beeps confirms that the audio is now unmuted.
When the Indexer Computer displays the AoA shown below, the audio will automatically
unmute. This will also be confirmed with two beeps.
Angle of Attack for Automatic Unmuting
5.4.2.3
When the Indexer Computer is powered off and then back on, the LAA audio will
automatically unmute.
5.4.3
Brightness Control*
The brightness can be adjusted through the use of the bottom button on the side of the
Indexer Computer. Holding the bottom button for two seconds will toggle between day/night
dimming. This button can be used to override the dim setting selected through the navigation
light switch.
