12
Foreword
mc-16 and mc-20
The Newest Generation of Remote Control Technology
The technical advances across the entire spectrum of
model building is an ever-present challenge to design
engineers. This is why the introduction of new trans-
mission technology in the 2.4 GHz band represents a
new milestone.
The HoTT-System (Hopping Telemetry Transmission)
developed by Graupner is a synthesis of know-how,
engineering and testing done around the world by
professional pilots.
Established Graupner HoTT techniques theoretically
permit over 200 models to be operated at the same
time. However, because of the interspersed radio-
frequency utilization permitted by certifi cation for the
2.4 GHz ISM band, this number is signifi cantly lower
in practical application. Nevertheless, in general more
models can be operated simultaneously in the 2.4 GHz
band than would be the case in conventional 35 or 40
MHz frequency bands. The real limiting factor is – as
often before – is still likely to be the size of available op-
erating space (i. e. airspace for aircraft). Alone the fact
that it is no longer necessary to coordinate transmit-
ting frequencies with other pilots in the vicinity (which
is sometimes quite diffi cult in broken landscapes, such
as on hillside slopes) represents an enormous boost for
remote control operating security.
Bidirectional communication between transmitter
and receiver, by way of a return channel built into
the receiver, permits convenient access to data and
programming in the HoTT receiver. For example, this
makes it possible to swap receiver outputs or to divide
up control functions among multiple servos (channel
mapping). Servo travel and servo rotation directions in
the receiver can also be matched to one another with
these facilities. Telemetry data, like VARIO and GPS
data, can be called up from optionally available mod-
ules.
The
mc-16 HoTT and mc-20 HoTT radio control
sets are based on the Graupner/JR mc-24 computer
radio control system, which was introduced back in
1997. The new equipment has been specially devel-
oped for the advanced RC pilot. The transmitters of
this series offer an unprecedented level of security and
reliability combined with outstanding operating con-
venience and ease of use.
Both these HoTT systems can easily be used to oper-
ate all current model types, whether your preference is
for fi xed-wing model aircraft or helicopters, model cars
or boats.
For example, every
mc-16 HoTT and mc-20 HoTT
transmitter is fully equipped in terms of software and
hardware to allow the use of the renowned NAUTIC
modules. A further innovation is the “channel se-
quencer” – available only on the mc-20 HoTT – which
provides a means of automating servo sequences
involving up to three servos.
However, it is fi xed-wing model aircraft and helicopters
in particular which call for complex mixed functions
involving the control surfaces or swashplate control
system. In this respect the latest computer technology
makes it extremely simple to program the system to
cope with a vast range of model requirements: simply
select the appropriate model type in the program of
your HoTT transmitter, and the software automatically
sets up all the relevant mixing and coupling functions.
Separate modules for implementing complex coupling
functions are no longer required, and complicated
mechanical mixers in the model are completely super-
fl uous.
Additional fl ight-phase-specifi c settings can be stored
in every model memory location. For example, such
settings can be made for various parameters that can
be called up to implement particular fl ight maneuvers at
the “press of a button”. Additional model memories can
be stored on the SD card, which is included standard
with the set. Even telemetry data can be recorded for
subsequent evaluation on a PC.
Since the
mc-20 HoTT is equipped with two dis-
plays, the lower display has been optimized for com-
prehensible, simple operation of the software. The
graphic representation of mixer functions is particularly
helpful. The upper display allows telemetry data to be
called up from the receiver.
Functionally-related options are clearly arranged by
content in a simple organization. The clear, compre-
hensible program structure permits a beginner to
quickly become familiar with the various functions and
able to use all options pertinent to his level of expertise
with remote control models.
This handbook describes every menu in detail. There
are tips, many notices and programming examples to
supplement the descriptions and also explanations for
model specifi c technical terms, like transmitter control,
dual rate, butterfl y, and so on.
Please observe the safety notices and technical no-
tices. Read through the instructions attentively. Before
usage, test all functions by simply attaching servos to
the receiver included in the set. While doing this, ob-
serve respective notes on page 77. This will help you
learn the essential operating techniques and functions
of your HoTT transmitter.
Always handle your remote controlled model with a
sense of responsibility so that you do not endanger
yourself or others.
The Graupner team wishes you much pleasure and
success with your HoTT transmitter system, the new-
est generation of remote control systems.
Kirchheim-Teck, june 2015
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