④ The binding is complete when the LED is always on.
⑤ Make sure F121 is armed (Details in next section). Gently push the throttle of transmitter to see if
motors move. If doesn’t, retry binding again.
Note
⚫ F121 currently supports SBUS signal output only, always make sure the LED of R8SM/R6DSM is
blue/purple, meaning SBUS signals output. If the LED is red, press the binding button twice in 1 second and
release to change it to purple/blue.
⚫ If it’s the transmitter of AT9S Pro/AT9S/AT10/AT10II used, channel quantity needs to be set first in order to
be compatible with receiver R6DSM. Long press MODE to enter BASICE MENU, select SYSTEM and
modify CH-SELECT as 10CH. Otherwise, F121 won’t be able to be armed.
3.7 Arm and Disarm F121
A. How to arm
Throttle on left(Mode 2): Toggle the left joystick to the lower right corner and hold this position for 3 seconds till
the green LED of F121 is on.
Throttle on right(Mode 1): With right joystick at bottom, toggle the left stick to the right and hold this position for 3
seconds till the green LED of F121 is on.
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