Thanks for the reply, Paul
I guess the remote "receivers" used by Spectum are technically "receivers", but they are not used for controlling servos.
I think they are used to provide redundant signals from differently oriented antennas, so as to provide another option for "errorless frame rate", as you mentioned.
There is really no "redundant" receiver..... if the receiver controlling the servos fails..... all is losy, no matter how many "satellite Receivers" are connected. (I think!!)
I just wonder why Futaba does not think the redundant signal info from a "Satellite Receiver" is necessary..... (as does Spectrum)
Does this indicate that the Spectrum system is not as "robust" as Futaba?
Does it indicate that the Futaba system (without the "Satellite) is not as "robust as Spectrum??
Actually, I think the two systems are pretty equivalent....
and, I'm sure both provide more than adequate range & response!!