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Program description - Free mixers
* N.N. = Nomen Nominandum (that indicates the named name)
Offset (mixer neutral point)
… should be defined. This is accomplished by using
the Select button of the left or right-hand four-way
button to move to the line below “Offset”:
L.Mix 1
0%
0%
0%
Offset
SET
STO
6 EL
Mix input
The dotted vertical line in the middle of the diagram in-
dicates the position of the mixer neutral point (“Offset”),
i. e. the specific point along the control travel at which
the mixer does NOT influence the control channel con-
nected 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
briefly tap the centre SET key of the right four-way but-
ton. 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 %:
L.Mix 1
0%
0%
+75%
Offset
SET
STO
6 EL
Mix input
Notes:
•
By selecting SET with the selection key
of the left or right four-way button followed
by a tap on the centre SET key of the right
four-way button …
L.Mix 1
0%
0%
Offset
SET
STO
6 EL
Mix input
+75%
… the offset value can be set manually or adjust-
ed in 1 % increments with the selection keys on
the left or right four-way button.
• By selecting SET, the mixer’s neutral point is auto-
matically set back to control centre with a simulta-
neous tap on both the or selection keys
of the right four-way button (CLEAR).
L.Mix 1
0%
0%
Offset
STO
6 EL
Mix input
+75%
SET
Symmetrical mixer ratios
The next task is to define the mixer values above and
below the mixer neutral point – starting from its current
position. Now select the “Mix input” section moving by
pushing the key.
If necessary, use selection keys on the left or
right four-way button to select the SYM field in order
to establish a mixer value which is symmetric to the
offset point just set. Following a brief tap on the centre
SET key of the right four-way button, set both SYM
fields (now in inverse video) via the selection keys of the
right four-way button to values between -150 % and
+150 %. Note that the mixer value set always refers
to the input signal of the respective transmitter con-
trol (control signal)! Negative mixer values reverse the
direction of the mixer.
A simultaneous tap on the or selection keys
of the right four-way button (CLEAR) will erase the
mixer ratio in the inverse video field.
The “optimum” value in our example will certainly need
flight-testing.
L.Mix 1
+75%
Offset
ASY
SYM
6 EL
Mix input
+20%
+20%
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. Ac-
cordingly, you should reposition the mixer neutral point
to -100 % of control travel, as described earlier:
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