Well that was my understanding is that it's only 9 channel and above, but I've not played with one of the newer AR-7000's which also have data ports to use with the Flight Log. I had mine updated to the latest Quick Connect firmware, but Horizon told me the data function would not be available without installing a new PCB.

I believe it was hilarious who was talking about both types being available with the DX-7, I think the feature that onewasp was talking about was the availability of the Quick Connect firmware as well as the data port on the AR-7000's manufactured after that February date.

Now there is one additional possibility; a 9 channel rx with a DX-7 tx and whether or not it would then work. I know there is some sort of communication between the 9 channel tx's and the rx to determine the resolution as the 9 channel and above rx's operate in 2048 resolution where the 7 channel and below operate in 1024 resolution. The exception would be the new DX-7SE which is a bunch faster and does run at 2048 resolution as well, but I think that will also require a new 7 channel rx for that resolution.