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Offset (mixer neutral point)
... should be defined. Switch over to STO for this by
using the selection key of the left or right touch pad:
Linear MIX 1
6
EL
Mix input
Offset
0%
0%
0%
SYM ASY
STO
SET
The dotted vertical line in the middle of the diagram
indicates the position of the mixer neutral point ("Off-
set"), i. e. the specific point along the control travel at
which the mixer does NOT influence the control chan-
nel connected to its output. The default position for
this point is at the control centre.
However, since in our example the flaps should be
closed or retracted with the slider control at its forward
limit and therefore the elevator should not be further
influenced in this position, the mixer neutral point must
be relocated to precisely this point. To do so, push the
slider control used (in this example, slider control Sl1)
to its forward limit if you have not already done so, then
SET
briefly tap the centre
key of the right touch pad.
The dotted vertical line moves across to this point, the
new mixer neutral point, which by definition always
retains the "initial" value of zero.
However, to better illustrate our example, we now
wish to set this "Offset" value to only -75 %.
214 Program description - Free mixers
Linear MIX 1
6
EL
Mix input
Offset
0%
0%
–75%
SYM ASY
STO
SET
Notes:
By selecting SET with the selection key
•
of the left or right touch pad followed by a
SET
tap on the centre
key of the right
touch pad ...
Linear MIX 1
6
EL
Mix input
Offset
0%
0%
–75%
SYM ASY
STO
SET
... the offset value can be set manually or adjusted
in 1 % increments with the selection keys on the
left or right touch pad.
By selecting SET by a tap on the centre
•
of the right touch pad – see previous figure – set
the mixer's neutral point automatically back to
control centre with a simultaneous tap on both the
or selection keys of the right touch pad
(CLEAR).
Symmetrical mixer ratios
The next task is to define the mixer values above and
below the mixer neutral point – starting from its current
position.
If necessary, use selection keys on the left or
right touch pad to select the SYM field in order to es-
tablish a mixer value which is symmetric to the offset
point just set. Following a brief tap on the centre
key of the right touch pad, set both SYM fields (now
in inverse video) via the selection keys of the right
touch pad to values between -150 % and +150 %.
Note that the mixer value set always refers to the in-
put signal of the respective transmitter control (control
signal)! Negative mixer values reverse the direction of
the mixer.
A simultaneous tap on the or selection keys
of the right touch pad (CLEAR) will erase the mixer
ratio in the inverse video field.
The "optimum" value in our example will certainly
need flight-testing.
Linear MIX 1
Mix input
SET
key
–20% –20%
SYM ASY
STO
Earlier, we set the mixer neutral point at -75 % of con-
trol travel: as a result, the elevator ("EL") will exhibit a
(slight) down-elevator effect even at the neutral point
of the landing flaps and this is naturally undesirable.
Accordingly, you should reposition the mixer neutral
point to -100 % of control travel, as described earlier.
SET
6
EL
Offset
–75%
SET
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