Content vs output resolution

Can someone confirm or deny that the Axon can not accept HD content? It seems when I run the content through TMPEG, using the DL3 preset, it always puts the content into 1024x768. I see in the CMA I can set the output to 1920x1080, but its then stretching 4:3 content to fit 16:9 aspect ratio. The website doesn't even mention any resolution support.

And I am sure since there are 500 variants of the Axon, that if it does, I then need to figure out which models.