Graupner Hendheld RC 2.4 GHz No. of channels: 6 33112 ユーザーズマニュアル

30

In theory the Graupner HoTT system permits the simul-
taneous operation of more than 200 models.
However, in practice the mixed operation of different 
technical systems in the 2.4 GHz ISM band - as required 
by the approval regulations - reduces this number 
considerably. Generally, however, it will always be pos-
sible to operate even more models simultaneously on 
the 2.4 GHz band than on the 35 / 40 MHz frequency 
bands which we have used to date. However, the actual 
limiting factor - as it has always been - is likely to remain 
the size of the (air-) space available. The simple fact that 
no frequency control procedure is necessary - a great 
convenience in itself - equates to an enormous gain in 
safety, especially at fl ying sites where groups of pilots 
may be distributed over a large area, with nobody in 
overall control.

Battery charged?
When you take receipt of your transmitter, the battery 
will be in the discharged state, so you must fi rst charge 
it as described on page 14. If you do not do this, the 
battery will soon fall below the 
pre-set threshold voltage, and 
you will see and hear a warn-
ing signal to remind you to 
recharge it.

When you switch the transmitter on, the following display 
appears in the centre of the transmitter screen for about 
two seconds:

RF  ON/OFF?

OFF

ON

Within this period you can switch off the RF signal if re-
quired by moving the black fi eld to the right using the 

c 

or 

f arrows of the right-hand four-way button; when you 

do this, ON should appear normal, and 

 in inverse 

form (black background).

RF  ON/OFF?

ON

OFF

You can now switch the RF module off by pressing the 
central 

 button of the right-hand four-way button.

Until this point the central LED glowed blue, but it now 
changes to red, and at the same time the screen switch-
es to the transmitter’s base display:

#01

0:33h

stop
 flt

0:00
0:00

0.0V

50%

5.2V

HoTT

M

The   symbol combination means that the currently 
active model memory is already “bound” to a Graupner 
HoTT receiver, but there is currently no connection with 
this receiver. (In our example we - of course - switched 
off the RF signal!)
In contrast, if you switch the transmitter on without 
switching off the RF signal, the central LED glows an 
intense blue, and the symbolic transmitter mast fl ashes. 
At the same time the transmitter emits an audible warn-
ing until a connection is made with the corresponding 
receiver. Once this connection exists, a fi eld strength 
indicator appears instead of the “x” at the base of the 
symbolic aerial, for example 

, and the visual and 

audible warnings cease.

batter y
needs
charging

Preliminary notes regarding the 

mx-12 HoTT transmitter

For more information please visit our Internet site at www.graupner.de

At the right of the same line a display in the same format 
appears when a telemetry connection is made, showing 
the strength of the telemetry signal picked up from the 
receiver (>

M

  ) together with the actual voltage of the 

receiver power supply.
However, if the symbol combination 

 appears, and 

the central LED glows a constant red, the currently ac-
tive model memory is not “bound” to any receiver.

Low-voltage warning
If the transmitter voltage falls below a particular value, 
a visual and audible low-voltage warning is generated. 
The default value is 4.7 V, but this can be varied in the 
“Basic Settings” menu (page 114).

Firmware update
Firmware updates for the transmitter are carried out at 
the owner’s discretion using the three-pin PC interface 
on the back of the transmitter, in conjunction with a PC 
running Windows XP, Vista or 7. It is essential to check 
the state of charge of the transmitter battery before 
any update; recharge it to be on the safe side, and 
be sure to back up all stored model memories be-
fore carrying out the update, so that you can restore 
the data if necessary.
To connect the transmitter to a PC you also require the 
optional USB adapter, Order No. 7168.6 and the con-
necting lead, Order No. 6466.S.
The latest software and information can be found in the 
Download section for the corresponding product at www.
graupner.de.