Installation Instructions

GTN 6XX/7XX AML STC Installation Manual 190-01007-A3
Page 5-56 Rev. 4
Air/Ground Logic
Select the source for the air/ground logic.
Table 5-54. Air/Ground Logic
Selection Description
Auto Airborne Off This is not a valid setting.
Squat Switch The transponder is connected to a squat switch to determine airborne
state.
GPS Data The transponder is using GPS data to determine the airborne state.
Only select this setting if a GTX input port is configured to GPS.
Altitude Data Select this setting if a squat switch is not installed and no GTX input
ports are configured for GPS.
Squat Switch Sense
The squat switch sense field may be set to either High or Low. If the air/ground logic field is set to squat
switch, the squat switch sense field is used to define the state of the squat switch input. If the squat sense
field is set to High, then when the squat switch input is high, the aircraft is considered to be on the
ground. If the squat sense field is set to low, then when the squat switch input is low, the aircraft is
considered to be on the ground.
Maximum Airspeed (GTX 33 Only)
Select the maximum true airspeed for the aircraft. The default is
<= 150 KTS.
Table 5-55. Maximum Airspeed (GTX 33 only)
Selection Description
<= 75 KTS Max aircraft operating speeds less than or equal to 75 knots TAS.
<= 150 KTS Max aircraft operating speeds less than or equal to 150 knots TAS.
<=300 KTS Max aircraft operating speeds less than or equal to 300 knots TAS.
<=600 KTS Max aircraft operating speeds less than or equal to 600 knots TAS.
<=1200 KTS Max aircraft operating speeds less than or equal to 1200 knots TAS.
>1200 KTS Max aircraft operating speeds greater than 1200 knots TAS.
UNKNOWN Max aircraft speed is unknown.
Address Type (GTX 33 Only)
Select the method of entry of the aircraft address.
Table 5-56. Address Type (GTX 33 only)
Selection Description
US Tail N-Registration Number (GTN main software version 3.00 or later)
HEX ID Allows technician to enter the aircraft registration number in hexadecimal
code format.