User's Manual

110
Program description: free mixers
shift the mixer neutral point exactly to that position. If
you have not already done so, turn the control - in our
example this is CTRL 7 - to the left-hand end-stop and
press the central SET button of the right-hand four-way
b
utton. The dotted vertical line now moves to this point
- the new mixer neutral point - which always retains the
“OUTPUT” value of zero in accordance with the mixer
defi nition.
As it happens, this setting is diffi cult to show in a
screen shot, so we will change the “offset” value to
only -75%.
MIX1 6 el
trv
0%
0%
–75%offs
SELSTO
Notes:
If y
ou wish, you can move the offset value back to •
centre or otherwise adjust it as follows: select SEL
using the arrow button f of the left or right-hand
four-way button, followed by pressing the central SET
b
utton of the right-hand four-way button; you can now
use the arrow buttons of the left or right-hand four-
way button to move the offset value.
You can also return the mixer neutral point to cen-•
tre automatically as follows: select SEL using the
arrow button f of the left or right-hand four-way
button, then simultaneously press the two arrow but-
tons cd or ef of the right-hand four-way button
(CLEAR).
Symmetrical mixer ratios
The next step is to defi ne the mixer values above and
below the mixer neutral point, starting from its current
position. Use the arrow button c of the left or right-hand
four-way button to move to the “Travel” line: if necessary,
use the arrow buttons ef of the left or right-hand four-
way button to select the SYM fi eld, so that you can set
the mixer value symmetrically relative to the offset point
you have just programmed. Press the central SET button
of the r
ight-hand four-way button, then set the values
in the two highlighted fi elds within the range -150% to
+150% using the arrow buttons of the right-hand four-
way button. Remember that the set mixer value always
refers to the input signal from the associated transmitter
control (control signal)! Setting a negative mixer value
reverses the direction of the mixer.
Simultaneously pressing the two arrow buttons cd or
ef of the right-hand four-way button (CLEAR) erases
the mixer ratio in the highlighted fi eld.
The “optimum” value for our purposes will inevitably
need to be established through a fl ight testing pro-
gramme.
MIX1 6 el
trv
+20%
+20%
–75%offs
ASYSYM
Since we previously set the mixer neutral point to -75%
of control travel, the elevator (“el”) will already exhibit a
(slight) “down-elevator effect” at the neutral point of the
landing fl aps, and this, of course, is not wanted. To cor-
rect this we shift the mixer neutral point back to -100%
of control travel, as described earlier.
MIX1 6 el
trv
+20%
+20%
–100%offs
SEL
STO
If you were now to reset the offset from -75% to, say, 0%
control travel, by selecting the SEL fi eld using the arrow
buttons f of the left or right-hand four-way button, and
then briefl y pressing the two arrow buttons cd or ef
of the right-hand four-way button (CLEAR) simultane-
ously, the screen would look like this:
MIX1 6 el
trv
+20%
+20%
0%offs
STO
SEL
Asymmetrical mixer ratios
For many applications it is necessary to set up different
mixer values on either side of the mixer neutral point.
Start by resetting the offset of the mixer used in our ex-
ample (“6 ¼ el”) to 0%, as shown in the picture above.
Now use the arrow button f of the left or right-hand
four-way button to select the ASY fi eld, and then press
the central SET button of the right-hand four-way button.
If y
ou now turn the rotary proportional control CTRL 7 -
assigned in our example to input 6 - in the appropriate
direction, the mixer ratio for each direction of control can
be set separately, i. e. to left and right of the selected
offset point using the arrow buttons of the right-hand
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