Multiplex Profi Tx Manual page 19

i) Using Fight Phases to fix mixer inputs
An alternative to activating inputs in each mix is to us the
settings in the controls menu (DEF2) for flaps, spoilers, aux, controls
etc to lock those controls in different flight phases as follows. This
locks the control and could be used to make it effective in say flight
phase 1 and 3 and not in 2 or 4.
Here in flight phase 2, set as
NORMAL on this model, the spoiler
control is fixed at -100%, these
means the spoiler control has no
effect on the spoilers, if used, or any
mixer that has spoiler as an input.
Profi – Mixers
5 - Other
Here in flight phase 3, LANDING, the
fixed input is OFF, this means that the
spoiler control is active and the spoilers,
if used, or any mixer that has spoilers as
an input will respond to the spoiler
control. Note also the slow setting, so if
flight phase is switched and control is in
fully deflected position , affected
surfaces will only move slowly