The main feed. I have to be honest. We emailed when the dish was announced and asked if they would add an ACARS feed (probably a joke to be made here about how #avgeeks did not get one out the gate), after a week or so, they said yes. When we saw it was linear, not LHCP, I email and asked 'what up'.
They said 'circular is hard to build/mount/house, its got so much gain, you simply don't need it'.
It was right then that I chose to back it to see if they were right. Spoiler. They were.
5/
#avgeeks