Installation Instructions

190-01007-A3 GTN 6XX/7XX AML STC Installation Manual
Rev. 4 Page 1-11
1.5.1.2 Installation without GTN Control of GTX Transponder
The GTX 327, 328, and 330 can be connected to the GTN without allowing the GTN to control the
transponder functions. GTN and GTX configuration settings can be found in Section C.8 and
Figure E-12, respectively.
If the GTN is not set to control the GTX 327, the interface to the GTX 327 is not required. However, the
GTN can send GPS groundspeed to the transponder. Also, if the GTN is not controlling the GTX 327, the
GTN can optionally receive pressure altitude from the GTX 327.
NOTE
When the GTN is not controlling the GTX 327 transponder, pressure altitude data is not
sent from the GTN to the GTX 327. Instead, the pressure altitude source must be
connected to the transponder.
For the GTX 330, TIS traffic can still be sent to the GTN even if the GTN is not controlling the
transponder. If GTN control of the GTX 330 and display of TIS traffic from the transponder on the GTN
is not desired, GPS position, track, and velocity can still be sent to the transponder.