Futaba GV-1 - Manual (Page 5)

PRECAUTIONS
Setting precautions
When using the GV-1 for the first time, or when making
changes in the throw of a servo, always perform the limit
setting operation.
(Setting method: Page 45)
Always set battery fail safe function at the GV-1.
(Setting method: Page 44)
Since the GV-1, when used, controls the throttle, the battery fail safe function
that is in a PCM transmitter will not be used.
Because the GV-1 controls the throttle, the throttle channel
fail safe function normally set in a PCM transmitter will not
be used. Set the fail safe function as described below.
Transmitter setting
Use the fail safe function for the channel that turns the governor on and
off to set the fail safe position to the point at which the governor is
turned off. With this setting, when the system enters the fail safe state,
the governor will be turned off and the receiver throttle signal will be
output directly.