Installation Instructions

GTN 6XX/7XX AML STC Installation Manual 190-01007-A3
Page 5-70 Rev. 4
5.5.4.9.2 Antenna Configuration Page
The antenna page allows configuration of antenna settings as shown in Figure 5-42. To access this page,
touch External Systems → GDL 88 → Configuration → Antenna.
Figure 5-42. GDL 88 Antenna Configuration Page
5.5.4.9.2.1 UAT/1090 Antenna
These settings control whether the GDL 88 antenna self tests are performed.
If the Top UAT/1090 Antenna (GDL 88D models only) is of the DC grounded type, select Enabled,
otherwise select Disabled. If the Bottom UAT/1090 antenna is of the DC grounded type, select Enabled,
otherwise select Disabled. Refer to the GDL 88 Part 23 AML STC Installation Manual for UAT/1090
antenna information.
5.5.4.9.2.2 GDL 88 GPS/WAAS Antenna (GDL 88/88D with GPS/SBAS Only)
These settings indicate the horizontal placement of the GDL 88 GPS/WAAS antenna on the aircraft.
Enter the GDL 88 GPS/WAAS antenna longitudinal offset distance rounded to the nearest foot from the
nose of the aircraft, and the lateral offset as measured in feet (left or right, looking forward) from the
centerline of the aircraft.