D180 altitude report to Garmin GTX 328

[Dynaero]

How do I connect my D180 serial output and serial ground to Garmin transponder GTX 328 to get altitude report in transponder?

 

[dynonsupport]

This is covered on page 4-7 of the latest D180 install guide. If you don't have a copy, you can download it here:

http://dynonavionics.com/docs/support_documentation.html