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238 Detail program description - Telemetry

… after confi rmation of "SUMO" with a brief tap 
on the center 

 key of the right touch pad, 

the active fi eld changes to the right for channel 
selection. With this selection you specify the 
highest of the transmitter channels contained in 
the SUMO signal:

Either confi rm the default with another tap on the 
center

 key of the right touch pad or use the 

selection keys to pick another channel between 
04 and 16 and confi rm that with 

.

Receiver outputs will be controlled successively 
in a 20 ms cycle (30 ms with the GR-32 DUAL 
receiver, order no. 33516), even if 10 ms is set in 
the "PERIOD" line of the the »RX SERVO« screen.
Primarily intended for the "Satellite mode" of 
two HoTT receivers, as described below, the 
sum signal generated by the SUMO-designated 
receiver can also be used, for example, 

to

control of Flybar systems (provided they have an 
appropriate input) or to control fl ight simulators via 
an adapter cable, order no. 33310

In …

… two HoTT receivers are connected to one 
another through a three-wire connecting cable 
(order no. 33700.1 (300 mm) or 33700.2 (100 mm)) 
at receiver-type-specifi c servo connections. Type 
GR-16 and GR-32 DUAL receivers, for example, 
are to be connected with one another at servo 
output 8. More detailed information can be found 
on the Internet at www.graupner.de.
This connection transmits all channels of the 
HoTT receiver confi gured as SUMO as well as 
those of the receivers designated as satellites 
continuously to the second HoTT receiver, which 
is to be programmed as …

SUMI (sum signal IN)
… the designation for the main receiver. 
Therefore, the signal always goes toward SUMI:

The receiver defi ned as SUMI, however, only uses 
the sum signal coming from SUMO in the event of 
a failure of receipt if at least one channel in SUMI 
is programmed to fail-safe. 
If the receiver programmed as the SUMO satellite 
receiver has a reception outage, the servos 
connected to this receiver assume the fail-safe 
positions which were programmed into the satellite 
receiver, completely independent of the main 
receiver.
On the other hand, if two receivers have a 
reception outage simultaneously, the fail-safe 
settings in the current receiver software at the 

time this manual went to print (in principle, the 
SUMO's fail-safe settings) become effective. In the 
individual case, however, interactions cannot be 
ruled out, which is why we urgently recommend 
performing an appropriate test BEFORE 
commissioning a model.
This receiver combination is recommended if, for 
example, one of the two receivers is installed in 
the model at an unfavorable position for receiving 
or as a result of nozzles, carbon fi ber material 
or the like, there is the danger that the receipt 
signal is weakened due to the fl ight position, so 
that interruptions of the range must be taken into 
account.
Therefore, make sure to connect the most 
important control functions to the main receiver 
programmed as SUMI, so that, in the event of 
a failure, the model remains controllable when 
the SUMO satellite receiver no longer receives a 
signal.
Telemetry data, such as the voltage of the on-
board electricity supply, on the other hand, is only 
sent to the transmitter by the satellite receiver 
confi gured as SUMO. Therefore, telemetry 
sensors are to be connected to the satellite 
receiver (SUMO).
Each receiver should be connected with its own 
supply line from the common voltage supply. With 
receivers with a high current load, it may even be 
benefi cial to connect them with two supply lines to 
the same current supply. 
On the other hand, if each of the two receivers
should be supplied from 
its own voltage source, 
the center cable must be 
removed from one of the 
two plugs of the satellite 
cable; see fi gure.

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If you would like to carry out additional