Castle sells an adapter for this purpose, communication with sbus. http://www.castlecreations.com/en/telemetry-link-for-sbus2-010-0152-00

It is confusing because they also sell one for spektrum, but as the person above posted , it doesn't work with the DX6R.

If I've read the futaba literature correctly, the 4PX and 7PX can both log the data for later review.

Can anyone speak to the castle / futaba combination? Does it work "as advertised"?