OK WAIT!!!!!
I just ran across this post on another forum. Can you verify this for me?
Originally Posted by tomsdk
Actually, there is a way to get receiver RSSI back to your TX. The SBUS.2 serial stream offers the recever RSSI (as frame error rate). So you can make a virual sensor that uplinks the RSSI to the transmitter. I did this, and can monitor the RSSI on my T14SG, and even set an alarm if the received signal gets below a certain level. 
Ofcourse this should happen very rarely due to the very good Futaba link - but its a nice safety feature.
Cheers
Thomas
Thanks for the tip.
I don't know how many times I've read "Futaba doesn't do that" in regards to this subject.