Carson Reflex Wheel ultimate touch 2.0 Instruction Manual page 59

Throttle speed
The throttle speed is identical to the steering speed but applies to
the channel 2.
The throttle go speed can be assigned to a trim switch.
The throttle return speed can be assigned to a trim switch.
Throttle middle point
On some models, the travel of the throttle is not equal to the travel
of the brakes. This function set the position of the middle point
between the throttle and the brakes.
In this example, the brakes have a travel of 40% and the throttle
60% (half more).
Throttle idle up
This function offset the neutral position of the throttle. On a gas
powered car, it can be useful to set the throttle idle up to a positive
value to increase the engine idle speed when it's not warmed up
yet.
In this example, the throttle trigger is at its neutral position but
due the throttle idle up that is activated and set to 20%, the
throttle servo is at 20%.
The activation of the throttle idle up function can be assigned to a
push button.
The throttle idle up value can be assigned to a trim switch.
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