GTN 625/635/650 TSO Installation Manual
190-01004-02
Page 6-20
Rev. F
6.6.10
Main System Configuration Page
Access the Main System Configuration page, as
shown in Figure 6-20 by touching the ‘Main
System’ key on the GTN Setup page. This page
displays miscellaneous configuration options.
AIRFRAME TYPE (software version 4.00 or
later)
The first step in configuring the GTN should be
setting the Airframe Type. The available options
are Aircraft and Rotorcraft. This setting will
change which configuration items are available
throughout the configuration process.
AIR/GROUND THRESHOLD
The air/ground threshold is the groundspeed at which the GTN transitions from a ground state to an
airborne state, and vice versa. To adjust the air/ground threshold, touch the key to the right and enter a
value. This field has a range of 0 (zero) to 99 knots and is set to 30 knots as a default value.
AIR/GROUND DISCRETE
The AIR/GROUND discrete is active-low, and can be configured to interpret if the aircraft is airborne or
on the ground based upon whether the input is grounded or open. If it is desired for the air/ground state to
be airborne when the squat switch input is grounded, then toggle the AIR/GROUND discrete key to
‘Active for Airborne’. If it is desired for the air/ground state to be airborne when the squat switch input is
open, then toggle the AIR/GROUND discrete key to ‘Active for Ground’. The default configuration is
Active for Airborne. See the table below.
AIR/GROUND Discrete
Configuration
AIR/GROUND Input State
GTN Air/Ground Status
Configured Active for Ground
Open
Airborne
Grounded
On-Ground
Configured Active for Airborne
Open
On-Ground
Grounded
Airborne
Figure 6-20. Main System Configuration Page
Содержание GTN 625
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