Техническая Спецификация для Graupner Hendheld RC 2.4 GHz No. of channels: 8 33116

38

Preliminary notes
In theory the Graupner|SJ HoTT system permits the 
simultaneous 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 flying 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 first 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 warning signal to remind 
you to recharge it. The threshold 
voltage can be adjusted in the 
“Battery warning threshold” line 
of the “

Basic settings” menu; 

see page 134.
Switching the transmitter on
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 
required by moving the black field to the right using the 


 or  arrows of the right-hand touch-key; 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 briefly press-
ing the central 

 button of the right-hand touch-key.

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

5.2V

HoTT

M

The   symbol combination means that the currently ac-
tive model memory is already “bound” to a Graupner|SJ 
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 flashes. 
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 field strength 

battery

needs

charging

Preliminary notes regarding the 

mx-16 HoTT transmitter

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

indicator appears instead of the “x” at the base of the 
symbolic aerial, for example 

, and the visual and 

audible warnings cease.
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 134).