FUTABA GV-1 Instruction Manual page 38

Note:
Setting the "Dir" mode disables the "governor ON/OFF switch" function.
In the "Dir" mode, always set the "mixture trim" function to INH.
In the "Gov" mode, when the mixture trim function is ACT, the AUX
(m.trm) connector becomes the mixture trim and when the mixture trim
function is INH, the AUX (m.trm) connector becomes the governor ON/
OFF switch input. Therefore, in the "Dir" mode, when the mixture curve
input signal was used, operation is performed with this signal.
Mixture rate setting
Each point of the mixture curve can be set. When the "Gov" mode is set with
the "mixture servo operation mode" function, "MGx" is displayed and when
the "Dir" mode is set with the "mixture servo operation mode" function,
"MDx" is displayed at each point. ("x"shows the number of characters of each
point.) Nine points can be set.
(Setting method)
1
With the governor in the off state,
move the throttle stick to the set
point.
At points other than the set point, "->" or "-<" is displayed to
indicate the direction of offset from the set point.
When the set point is reached, the rate display changes from
flashing to a steady light to show that setting is possible.
MGx/MDx