Garmin GTN6XX Benutzerhandbuch

190-01007-A1

System Maintenance Manual GTN 6XX/7XX Part 23 AML STC

Rev. 7

Page 7-17

7.4.3.4 EHSI Deviation Scaling for HSI/CDI Driven by GTN through ARINC 429 Data
If the GTN has a serial connection to an EFIS display, proper scaling of the EFIS CDI and VDI must be 
verified. 

1. Cycle power to the GTN and acknowledge the prompts until it gets to the Instrument Panel Self-

Test page (see Section 6.1.1).

2. With the Instrument Panel Self-Test page displayed on the GTN, look on the EHSI/EFIS and

verify that the lateral deviation is half-scale left and not flagged.

3. With the Instrument Panel Self-Test page displayed on the GTN, look on the EHSI/EFIS and

verify that the vertical deviation is half-scale up and not flagged. .

7.4.3.5 GMX200/MX20 Interface Check
The Garmin GMX 200 or MX20 interface should be verified as described in this section. 

1. Ensure that the GTN has a 3-D position fix.

2. Create and activate a flight plan on the GTN by touching the Direct-To key and entering a

waypoint.

3. Verify that the RTE and POS data flags are not displayed on the GMX 200/MX20.
4. Verify that the flight plan is displayed on the GMX 200/MX20 using the flight plan (FPL)

function.

1. For remote transponders, configure transponder per Section 7.4.4.1.

2. Perform interface check per Section 7.4.4.2.

7.4.4.1 Remote Transponder Configuration
A remote transponder can be configured by the GTN through RS-232 if a transponder is configured for one 
of the RS-232 ports. To configure the transponder, it must first be selected as present and the type of 
transponder installed must be specified. To do this, access the Interfaced Equipment page on the GTN 
Setup page (Figure 3-11). Next, go to the External Systems page and touch the XPDR key. This displays 
the page shown in Figure 7-4, which allows the remote transponder to be configured. The remote 
transponder should be configured in accordance with the installation manual for that specific transponder.