Split one input into two servo's (functions)


New to the whole project I’m very exited of it. Before I read all the documentation I had a question: is it possible (without intervention in the software) to split the input of one channel into two servos (or functions)? Specific; can I split my throttle input so that I use the upper half for my engine speed and the lower half for controlling my spoilers. In my transmitter (Graupner mz-12 pro) this appears not to be possible.

Greets and thanks.