Garmin GTN 6 series Maintenance Manual - page 75
190-01007-B1
GTN 6XX/7XX Part 27 AML STC Maintenance Manual
Rev. 1
Page 6-11
6.3.6.1
Remote Transponder Configuration
A remote transponder can be configured by the GTN via 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 6.3.6.2, which allows the remote transponder
to be configured. The remote transponder should be
configured in accordance with the installation manual for that
specific transponder.
NOTE
If the GTN controls any transponder (GTX 32/33/327/
328/330), then that transponder will boot into the
same mode (Normal or Configuration) as the GTN.
NOTE
If the GTN is not communicating with the GTX
transponder, all of the editable fields for the setup items shown in the following sections
will be dashed out. If the fields are dashed out, check the wiring and pin connections from
the GTN to the transponder.
NOTE
The GTN can interface to the GTX 327/328/330/330 ES; however, configuration of the
panel-mounted GTX 327/328/330/330 ES is not supported. These transponders should be
configured per their installation manuals rather than through the GTN.
6.3.6.2
Transponder Interface Check
If the GTN is interfaced to a GTX 32/33 remote transponder or a GTX 327/328/330 configured as a remote
transponder, the following checks must be completed.
1. With the GTN unit running in normal mode and the transponder powered on, go to the Home page
and ensure there is no red ‘X’ over the transponder data field on the screen.
2. Ensure that a code can be entered into the code field. Enter a code using the keypad and then touch
the Enter key. Ensure the code that was entered is displayed in the transponder data field.
3. If dual transponders are installed, select Transponder 2 and perform steps 1 and 2 for the second
transponder as well. Also pull the Transponder 1 circuit breaker and ensure the Transponder 1 data
field is red ‘X’d rather than the Transponder 2 data field to verify that the wiring is not crossed.
(i.e. Transponder 1 is incorrectly connected to the GTN.)
4. Repeat steps 1 through 3 for the second GTN.
Figure 6-4. XPDR1 Configuration
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