leggendo il manuale della mia radio e girando per la rete, mi sono reso conto che la DX7 non ha la funzione di FailSafe!!!
"To be technically-precise - the Spektrum system does not go into a "Fail Safe" mode. Except for the THROTTLE channel, and that is only when it is Active in the TX setup!. What the receiver DOES do is "HOLD" the last servo-positioning signal when the transmitted signal is lost for some reason other than loss of power to the Receiver."