User manual

141Program description - Channel 1 curve | Helicopter models
Channel 1 curve
Control characteristics for throttle/collective pitch stick
This option is available as standard on
both transmitter types.
Use the selection keys of the left or right
four-way button to scroll to the »Channel
1 curve« menu option in the Multi-function menu:
Servo adjustment
Stick mode
Switch display
Control adjust
Dual Rate / Expo
Channel 1 curve
Open this menu option with a tap on the center SET
key of the right four-way button:
Input
Output
Point
?
0%
0%
0%
Ch1 curve
Curve
off
Since the carburetor response or the effect of collec-
tive pitch is often non-linear, you can make compen-
satory adjustments to these in this menu.
The menu therefore enables modification of the con-
trol characteristics of the motor/collective pitch stick,
regardless of whether this control function affects the
servo connected to control channel 1 directly or af-
fects multiple servos via various mixers.
If flight phases have been specified in the »Phase
settings« and »Phase assignment« menus (see
pages 156 and 158) this option can be adapted
on a flight-phase basis. The given flight phase name,
e. g. «normal», will be shown at the bottom left of
the screen.
The control curve can be defined by up to 6 points
(termed “reference points” below) placed anywhere
along the path of stick travel. While the on-screen
graph considerably simplifies the process of setting
and adjusting the reference points, we recommend
that you set fewer reference points to begin with.
Please note that the curve characteristic you set
here acts as the input signal for specific mixers in the
»Helicopter mixer« menu, page 188.
»Helicopter mixer«
Ch1 
Ch1  Tail rotor
Ch1-
curve
Pitch
Thro
Pitch
stick
In the basic software set-up, 2 reference
points – namely the end-points at the bottom end of
stick travel (“L”, low = -100 % travel) and the top end
of stick travel (“H”, high = +100 % travel) – define a
linear characteristic curve.
First, switch to your chosen flight phase, if necessary.
Setting reference points
By moving the transmitter control (motor/collective
pitch stick), you can reposition the vertical line in the
graph between the two end-points “L” and “H”. The
current stick position is also displayed in numerical
form on the “Input” line (-100 % to +100 %). The point
at which this line crosses the curve is termed the
“Output”, and can be varied at the reference points
within the range -125 % to +125 %. The control sig-
nal altered in this way will then affect all subsequent
mixer and coupling functions.
In the example above, the stick is at 0 % of control
travel and also generates an output signal of 0 %,
since the characteristic curve is linear.
Up to 4 additional reference points can be set be-
tween the two end-points “L” and “H”, although the
distance between neighboring reference points must
not be less than approx. 25 %.
If necessary, use the left or right-hand arrow button 
to move the marker frame down to the “Point” line:
Input
Output
Point
?
0%
0%
0%
Ch1 curve
normal
Curve
off
Move the stick. If a question mark can be seen in the
“Point” frame, then the next reference point can be set
with a tap on the center SET key of the right four-way
button. Simultaneously, the “?” is replaced by a num-
ber and the value field to the right of the reference
point number will be shown in inverse video:
1
+50%
+50%
+50%
normal
off
Input
Output
Point
Ch1 curve
Curve
The order in which you generate the (maximum) 4
reference points between the end-points “L” and “H” is
irrelevant, since the reference points are continuously
renumbered automatically from left to right as they
are entered.
Erasing reference points
To delete one of the reference points (1 to max. 4),
use the stick to move the vertical line into the vici nity
of the reference point in question. As soon as the
reference point number and the associated value are
superimposed in the “Point” line, you can activate the
Value field by pressing the central SET button of the
right-hand four-way button, then erase it by simulta-
neously pressing the  or  buttons of the right-
hand four-way button (CLEAR). A brief press of the
central ESC button of the left-hand four-way button
concludes the procedure.
mc
 
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