So if I understand this. We have 2 tx modules. So you can bind one to the #1 tx module in normal mode and the other to #2 tx module in normal mode and link sat receiver to the main by plugging from the sat rx ppm designated servo port into the Sat input on main rx.
In this scenario, what does it take for the sat rx to take over? Complete loss of main sig? Or is it an algorithm based on sig dBM or?
Ie how does degradation work?