I had to move my digital source from the GDU460 to the GNX375 because of this. But first i checked with my ELT supplier to ask them what format it was programed in. In my case it was Aviation Format 1.
When I moved it to the GNX375, I also had to move other GNX375 ports around because only a few ports had the option of outputting aviation format 1. It was a bit of musical chairs.
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Dues paid 2022, worth every penny
98% done, 2% left to go
Structure done (less gear)
Firewall Forward 95% done