GRAUPNER mx-24s, Programming Manual

Page: 136 / 216

136 Program description: Mixers
In this very simple example of a serial mixer, the se-
cond mixer affects the transmitter signal of cont-
rol function 7, as shown under a), but also the enti-
re (mixed) signal present at the servo side of control
channel 7, as shown under b). It then passes this sig-
nal to control channel 8, taking the set mixer ratio into
account. The effect of control “6” therefore extends as
far as output “8”. The serial link for additional subse-
quent mixers can be continued as far as you like, for
example, via a further mixer “8
12”, so that the ef-
Mixer switches
In our example, the switches and control switches “4”,
“G4” and “7” have been assigned to the three line-
ar mixers 1, 2 and 4, as shown in the drawings on the
opposite page.
The switch symbol shows the actual switched state.
The extreme right-hand column shows whether the
mixer in question is currently switched “off” or “on”.
Mixers to which no switch has been assigned are per-
manently switched on.
A switch must be assigned to the 4th mixer if you
wish to switch between two fi xed mixer values (yet to
be defi ned), corresponding to the two end-points of
a (proportional) transmitter control. This means that
the “switch channel” mixer cannot be switched “on” or
“off” like the other mixers.
If you intend setting up a control switch (G1 ... G8),
please remember that you also have to assign a
transmitter control to it BEFOREHAND; this is carried
out in the »
Control switches « menu. The exception
to this rule is the pre-defi ned control switches G1 +
G2, which are assigned to the C1 stick by default. The
same applies, of course, to the logical switches.
“Type” column
Including the trim
If you are using one of the primary control functions 1
… 4, you can program the trim value of the digital trim
lever to affect the mixer input, if you wish. Use the ro-
tary control to select “Tr.” in the highlighted fi eld for
the mixer in question.
The effect of the C1 trim lever on the mixer output va-
ries according to the function which has been assi-
gned to it in the “Trim” column of the »
Stick mode «
menu (see page 76). These are the options for fi xed-
wing models:
Trim Effect on mixer output
none linear over the full trim lever travel
forward only effective when the C1 stick is for-
ward
back only effective when the C1 stick is back
… and for model helicopters:
Trim Effect on mixer output
Thr AR linear over the full trim lever travel
Thr lim Only effective in the minimum position
of the assigned throttle limit slider
Serial mixer links
As has already been explained (see page 134), you
can also link mixers together in series. When a seri-
al mixer is invoked, the “input signal” of one control
channel branches at the point where it is already on
its way to the servo, and is sent to a different chan-
nel; see page 29. In the “Type” column select the ar-
row “
” to set up this link, or “Tr ” if you also wish
the trim to act on the mixer input.
Example:
Serial connection of mixers according to the following
arrangement:
Two mixers (MIX 6 7 and 7 8):
=>
=>
?? ?? - - - -
?? ?? - - - -
SEL SEL SEL
6
7 7
8 LinearMIX
type
1
LinearMIX
LinearMIX
LinearMIX 2
3
4
from to Adjust
a) without a serial link:
b) … and the same mixers with a serial link:
6 6
7
Se
rv
o
4,
8
V
C5
7
7
Be
s
t.
-N
r.
4
1
0
1
Se
rv
o
4,
8
V
C5
7
7
Be
s
t.
-N
r.
4
1
0
1
7
8
Se
rv
o
4,
8
V
C5
7
7
Be
s
t.
-N
r.
4
1
0
1
PROP
CHANNEL
MIX 1
MIX 2
6 6
7
Se
rv
o
4,
8
V
C5
7
7
Be
s
t.
-N
r.
4
1
0
1
Se
rv
o
4,
8
V
C5
7
7
Be
s
t.
-N
r.
4
1
0
1
7
8
Se
rv
o
4,
8
V
C5
7
7
Be
s
t.
-N
r.
4
1
0
1
PROP
CHANNEL
MIX 1
MIX 2