Graupner GmbH & Co. KG MC-20 用户手册

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88
Detail program description - Base setup models | Winged models
of the main switch on the transmitter, marked RF, 
will begin to blink; this will also be accompanied by 
acoustic tones. At the same time, the timer in the 
transmitter's display will start counting down and 
every 5 seconds a two-frequency tone will sound. 
Five seconds prior to the end of the range test 
a three-frequency tone will sound once every 
second. After expiration of the range test's 99th 
second the transmitter will again be switched to 
full output power and the LED just to the right 
of the main switch on the transmitter will again 
illuminate constantly.
Move away from the model while manipulating 
6. 
the joysticks during this timespan. If you notice an 
interruption anytime while still within a distance of 
about 50 m, try to reproduce this malfunction.
If there is a motor in the model, it may be 
7. 
necessary to switch it on to further check noise 
immunity.
Continue moving away from the model until 
8. 
perfect control is no longer possible. 
Wait at this distance for the remainder of the test 
9. 
period with the still-operationally-ready model 
to expire. After the range test is ended it should 
again respond correctly to all RC controls. If this 
is not 100 % the case, do not use the system. 
Contact your area's Graupner GmbH & Co. KG 
service partner.
Perform the range test before each fl ight and, in 
10. 
doing so, simulate all servo movements which 
also take place during fl ight. The range must 
always be at 50 m on the ground in order to 
assure safe model operation.
Caution:
Never start the range test on the transmitter 
during normal operation of the model.
  DSC output
If necessary, use the 
cd selection keys of the left 
or right touch pad to switch to the "DSC Output" line 
then, with a tap on the center 
SET
 key of the right 
touch pad, activate the value window:
SET SET
SEL
SET
Rcv Ch Map
R16
R08
n/a
n/a
RF transmit
on
RF range test
99s
DSC Output
PPM10
B A S I C   S E T T I N G , M O D E L
Now you can use the right selection keys to choose 
between four types of modulation "PPM10", "PPM16", 
"PPM18" and "PPM24". Touch the center 
SET
 key of 
the right touch pad again to complete the entry.
This choice primarily infl uences the maximum 
number of control channels which can be attached to 
the DSC (direct servo control) socket, and thus also 
available to a fl ight simulator or teacher/pupil system. 
By selecting "PPM10" this will be control channels 
1 … 5, for "PPM16" channels 1 … 8, for "PPM18" 
channels 1 … 9 and for "PPM24" channels 1 … 12.
  Autorotation
Autorotation is that state of descending fl ight in 
which the pitch of main rotor blades are set such that 
the rotor's speed matches the natural forces of air 
fl owing through, like a windmill. This built-up energy 
can be used for "recovery" lift to brake a descent by 
appropriate blade pitch adjustment.
Autorotation is a means by which real and model 
helicopters are able to land safely in emergency 
situations, e.g. in the event of a motor failure. However, 
the prerequisite for this is a well-trained pilot familiar 
with the helicopter's characteristics. Quick reaction and 
good perceptiveness are necessary because the rotor's 
inertia can only be used once to generate recovery lift.
  Range test
The built-in range test reduces transmission power 
to an extent that a functional test can be carried out 
even within a distance of less than 100 m.
Perform a range test on the Graupner HoTT system 
according to the following instructions. If necessary, 
have someone assist you in carrying out the range test.
Preferably, the receiver already bound to the 
1. 
transmitter should be installed into the model in its 
intended position.
Switch remote control on and wait for the green 
2. 
LED to light up on the receiver/s. Now servo 
movements can be observed.
Place the model on a level surface (pavement, 
3. 
low-cut grass or bare ground) such that receiver 
antennas are at least 15 cm above ground level. 
It may be necessary to put something under the 
model to raise it up enough for this.
Hold the transmitter at hip level and at some 
4. 
distance from one's body. Do not point the 
antenna directly at the model but rather turn and/
or kink the antenna's end so that it is oriented 
vertically during the test.
If necessary, use the 
5. 
cd selection keys of the left 
or right touch pad to reach the "RF range test" line 
in the menu then start range test mode with a tap 
on the center 
SET
 key of the right touch pad.
Module
bind
bind
n/a
n/a
HoTT
SET SET
SEL
SET
Rcv Ch Map
R16
R08
n/a
n/a
RF transmit
on
RF range test
99s
B A S I C   S E T T I N G , M O D E L L
When the range test has been initiated, 
the transmitter's transmission power will be 
signifi cantly reduced and the LED just to the right