Installation Instructions

190-01007-A3 GTN 6XX/7XX AML STC Installation Manual
Rev. 4 Page 5-97
5. Verify that the radar begins sweeping and the test pattern is shown.
WARNING
Aircraft should be outdoors and personnel should not be in front of the weather radar
when it is radiating (i.e., when Weather or Ground mode is selected on the GTN).
6. If stabilization is supplied to the radar, turn the radar to Weather mode and turn stabilization on in
the weather menu. Verify that STAB On is displayed in the upper right corner or the radar
display. If STAB INOP is displayed, verify that stabilization is being supplied to the weather
radar R/T.
7. Using the Mode key, set the mode to Off.
NOTE
If only one GTN 7XX is installed, the following steps do not have to be carried out.
8. Repeat steps 3 through 7 for the second GTN 7XX.
9. On each GTN 7XX, touch the Mode key and select Standby and wait for the warm-up to
complete.
10. On each GTN 7XX, touch the Mode key again and select Test mode.
11. On GTN #1, touch the Zoom Out key to increase the range of the radar display. Verify that the
range on GTN #1 changes and the range on GTN #2 does not change.
12. On GTN #2, touch the Zoom Out key to increase the range of the radar display – select a
different zoom level than GTN #1. Verify that the range on GTN #2 changes and the range on
GTN #1 does not change.
13. On each GTN 7XX, using the Mode key, set the mode to Off.