What causes the fail-safe bit to be set in the SBUS protocol?
I know that the when the link between the transmitter and receiver is lost, the fail-safe bit is set, however, what constitutes a 'lost link'?
Is the fail-safe bit set when:
- some consecutive number of frames are lost?
- a frame-error-rate threshold is crossed?
- something else?
In case this logic is hardware specific, here are the details:
Transmitter: Futaba T18MZ WC
Receiver: Futaba R7008SB