Interfaced Equipment; Navigation Indicator - Garmin GTN Xi Series Maintenance Manual

7.3 Interfaced Equipment

This manual does not cover the removal/replacement of the following interfaced equipment. However, the
following procedures are required to ensure proper functionality with the interfaced equipment. Perform
the following calibration procedures and interface checks after re-installing or replacing any of the
optionally interfaced equipment.
7.3.1

Navigation Indicator

1. Perform calibration per Section 7.3.1.1.1.1 (if using GPS) or Section 7.3.1.1.2.1 (GTN 650/750
only) if using VOR/LOC/GS receiver.
2. Perform ground checks per Section 7.3.1.2 and the appropriate interface check.
7.3.1.1 Navigation Indicator Calibration
7.3.1.1.1 Main Indicator (Analog) Configuration Page
In Configuration mode, select the Main Indicator (Analog) Configuration page from the GTN Setup
page. This page allows you to calibrate the OBS resolver, configure the CDI key, selected course for GPS
and VLOC, as well as the V-Flag state. Configurable fields are described in the following sections.
7.3.1.1.1.1 Main Indicator OBS Resolver Calibration
To calibrate the OBS resolver from the Main Indicator (Analog) Configuration page:
1. Touch the Calibrate key on the under Calibrate OBS Resolver.
2. Select 150˚ on the External CDI/HSI, then touch the OK key, as prompted on the display.
3. After the OBS resolver has completed calibrating, the GTN Xi will display, "OBS Resolver
Calibration Complete!" Touch OK after the calibration is complete.
4. Verify OBS operation by checking that the selected course displayed at the top of the page is
within 2° of the selected course.
The Main Indicator (Analog) Configuration page allows the CDI connected to the NAV board (P1001) to
be ground checked and allows the NAV indicator interface to be verified. Refer to Section 7.3.1.2.1 for the
ground check.
7.3.1.1.2 VOR/LOC/GS Configuration Page (GTN 650Xi/750Xi Only)
Select the VOR/LOC/GS key on the GTN Setup page. This page allows you to verify the CDI outputs
from the VOR/LOC/GS receiver as well as the OBS resolver input to the VOR receiver. It allows you to
select the format for the DME tuning data.
7.3.1.1.2.1 Calibrate OBS Resolver
To calibrate the OBS resolver from the VOR/LOC/GS Configuration page:
1. Touch the Calibrate key from the under Calibrate OBS Resolver.
2. Select 150˚ on the external CDI/HSI, then touch the OK key when prompted by the display.
3. Touch OK after calibration is complete.
4. Verify OBS operation by checking that the selected course displayed at the top of the page is
within 2° of the selected course.
190-01007-C1
Rev. 1
GTN Xi Part 23 AML STC Maintenance Manual
Page 7-11