190-01007-C1
GTN Xi Part 23 AML STC Maintenance Manual
Rev. 1
Page 7-13
7.3.2 Serial Tuned DME
7.3.2.1 Serial Tuned DME Configuration
On the
VOR/LOC/GS Configuration
page, set the DME mode and DME Channel mode to the values
specified in the configuration log. Configuration of these settings is required if exchanging GTN 650Xi/
750Xi units, but is not required if replacing a DME with an equivalent unit.
7.3.2.2 Interface Check (GTN 650Xi/750Xi Only)
Verify the interface performing the following steps:
1. Select a VOR/ILS channel that corresponds to (1) a DME station within a 40 nautical mile range or
(2) the frequency of a DME ground tester.
2. Verify that the DME locks on to the signal and a valid distance is displayed.
3. Tune an invalid VOR station. Verify that the DME data is flagged.
4. If multiple GTN Xi units are set up to remotely channel a DME, repeat steps 1-3 using the other
GTN Xi.
7.3.3 Displays
Perform the appropriate interface check for the replaced EHSI, EFIS, PFD, or MFD. No additional
configuration on the GTN Xi is required when replacing a display with an equivalent unit.
7.3.3.1 Honeywell (Bendix/King) EFS 40/50 Interface Check
If a Honeywell EFS 40/50 has been connected to the GTN Xi, the interface should be verified as described
in this section.
1. Cycle power to GTN Xi #1 and acknowledge the prompts until the
Instrument Panel Self-Test
page is displayed (refer to Section 6.1.1).
2. Ensure that GPS1 data displays by pressing the
1-2
key on the EFS 40/50 control panel.
3. While the GTN Xi displays the
Instrument Panel Self-Test
page, verify that the EFS 40/50
displays data from the GPS source:
Course Deviation: Half-scale left deviation, TO indication, flag pulled
Active Waypoint: GARMN
Vertical Deviation: Half-scale up deviation (only if installation is setup to display GPS vertical
deviation)
4. On the GTN Xi, verify that an OBS value displays and is not dashed out.
5. Using a VOR test set, verify that the CDI deviation on the EFS 40/50 displays correctly.
6. Cycle power to GTN Xi #2 and acknowledge the prompts until on the
Instrument Panel Self-Test
page.
7. If a second GTN Xi is installed, switch to GPS2 data by pressing the
1-2
key on the EFS 40/50
control panel and repeat steps 3 through 5 with GTN Xi #2.
