Graupner Hendheld RC 2.4 GHz No. of channels: 12 33124 Data Sheet

199

the model memories of the 

mx-20 HoTT teacher 

transmitter. The HoTT receiver of the model in question 
must also be "bound" to the teacher transmitter, since the 
latter ultimately controls the model, even in pupil mode.
ALWAYS ENSURE YOU SWITCH ON THE 

HoTT teacher transmitter FIRST BEFORE PLUGGING 
THE CONNECTION CABLE INTO THIS UNIT. If you do 
not, the RF module will not be enabled.
The 

mx-20 HoTT teacher transmitter can be 

connected to any suitable pupil transmitter, even 
transmitters using the "traditional" 35/40 MHz range. 
If the pupil-side connection does NOT utilize a two-
pole DSC socket, however, but a three-pole trainer 
socket from the Graupner range (for example), then the 
fundamental precondition for a correct connection 
to a pupil transmitter is that the modulation type 
PPM (18 or 24) must ALWAYS be confi gured in the 
pupil transmitter, regardless of the modulation type 
used in the teacher transmitter. 

The model to be controlled by the pupil must be 
programmed completely – i. e. with all its functions including 
trims and any mixer functions – in one of the model 
memories of the teacher transmitter. If present, the HoTT 
receiver of the model in question must also be "bound" to 
the teacher transmitter. In principle, however, an 

mx-20 

HoTT pupil transmitter can also be connected to a teacher 
transmitter from the "traditional" 35/40 MHz range.
Almost any transmitter with at least 4 control functions 
from previous and current Graupner series can be used 
as a pupil transmitter. More detailed information can be 
found in the RC main catalog and on the www.graupner.
de website.

If required, the pupil transmitter should be fi tted with the 
connection module for pupil transmitters. This is to be 
connected to the transmitter board in accordance with 
the supplied installation instructions. 
Information on the pupil modules required in each case 
can be found in Graupner's RC main catalog and on the 
www.graupner.de website.
The connection to the teacher transmitter is made using 
the appropriate lead; see the following double page.
The control functions of the pupil transmitter MUST 
act directly on the control channels, i. e. the receiver 
outputs, without intermediary mixers. 
If you are using an "

mc" or "mx" series transmitter, 

it is best to activate a free model memory with the 
required model type ("Fixed-wing" or "Heli"). Assign the 
model name "Pupil" and set up the stick mode (mode 1 
… 4) and "Throttle min. forward/back" to suit the pupil's 
preferences. All other settings are left at their default 
values, however. If you have selected the "Helicopter" 
model type, you must also set the throttle/ collective 
pitch direction and idle trim on the pupil transmitter. All 
other settings, including mixer and coupling functions, 
are confi gured exclusively on the teacher transmitter, 
which in turn transmits them to the model.
With "D" and "FM" type transmitters, you must also 
check the direction of servo rotation and stick mode, 
and adjust as necessary by swapping the corresponding 
leads. All mixers must also be switched off or set to 
"zero".
When assigning control functions, the usual conventions 
must be observed:

1

Motor throttle/collective pitch

2

Aileron/roll

3

Elevator/pitch-axis

4

Rudder/tail rotor

If you wish to transfer other control functions to the pupil 
transmitter in addition to the functions of the two dual 
axis sticks (1 … 4), access the "Control adjust" menu 
on the pupil transmitter and assign transmitter controls to 
the inputs that correspond to the control numbers 5 … 12 
released on the teacher transmitter's "Teacher/pupil" menu.

socket on the pupil side, ALWAYS leave the 
pupil transmitter's On/Off switch in the "OFF" 
position: this is the only way to guarantee that 
no RF signal is sent from the pupil transmitter's 
transmitter module , even after the DSC lead has 
been plugged in.

Both transmitters are connected to one another using 
a suitable lead (see summary on next page): The plug 
marked "M" (master) must be inserted into the socket 
on the teacher transmitter, and the plug marked "S" 
(student) into the pupil transmitter's socket. (Note that 
not all leads may have such "M" and "S" labeling.)