GRAUPNER mc-32 HoTT User manual

Programming Manual
33032.mc-32 HoTT.3.en
mc-32
Programming Manual
mc-32

2Table of contents
Shortcuts ............................................................ 32
Warning notices in the display ............................. 33
Function fields in the display ................................ 34
Entry lockout ....................................................... 34
HIDDEN MODE ................................................... 35
Display contrast .................................................. 35
Language selection
VOICE.................................................. 35
Change of display language ................. 36
Firmware update via SD card ......................... 36
STICK CALIBRATION ..................................... 37
Bluetooth initialization ..................................... 39
Telemetry data display ......................................... 40
Commissioning the transmitter ........................... 48
Transmitter firmware updates............................... 50
Restoring the transmitter software ....................... 51
Receiver initialization............................................ 52
Receiver firmware updates .................................. 53
Secure receiver settings....................................... 53
Installation notices................................................ 54
Receiver power supply ........................................ 55
Definitions of terms................................................... 58
Physical control, switch and control switch assignments ...... 60
Digital trim ................................................................ 62
Winged models...................................................... 64
Receiver layout.................................................... 65
Servos in wrong direction .................................... 66
Helicopter models ................................................. 68
Receiver layout.................................................... 69
Program descriptions
Loading a new memory location.............................. 70
»Model select«....................................................... 73
»Copy / Erase«....................................................... 74
Erase model ....................................................... 74
Copy model Model......................................... 75
Export to SD card............................................... 75
Import from SD card........................................... 76
Copy flight phase................................................ 77
General notices
Warning and note symbols ......................................... 3
Safety notices ........................................................... 4
Safety notices and handling regulations for
Lithium-Ion (LiIo) and Lithium-Polymer (LiPo)
batteries ..................................................................... 8
Environmental protection notices .............................. 10
Foreword.................................................................. 10
Remote control set description ................................. 13
Technical data .......................................................... 16
General operating notices
Transmitter .......................................................... 18
Opening the transmitter housing..................... 18
Transmitter power supply ............................... 18
Recommended chargers (accessory) ............. 19
Battery operation timer ................................. 19
General charging notices................................ 20
Lithium battery CR 2032 .............................. 20
Stick length adjustment .................................. 20
Stick conversions ........................................... 21
Transmitter neckstrap support bars .............. 22
Installation of switches, switch modules and
knob modules ............................................... 22
Aligning the antenna ..................................... 22
Transmitter description
Front side ....................................................... 23
Face-side connectors
Charger socket ............................................. 24
DSC jack........................................................ 24
Mini USB connector ....................................... 25
Data jack........................................................ 25
Card slot ........................................................ 26
Headset connector......................................... 27
Ext. PPM........................................................ 27
SPI ................................................................. 28
Bottom side transmitter interior............................ 29
Display and keypad ............................................. 30
Operating the “data terminal“............................... 31
Table of contents
Changes ............................................................. 77
»Suppress codes«................................................. 80
»Suppress models«............................................... 81
»Basic settings, model«
Winged model .................................................... 82
Binding type .................................................. 83
Binding receivers........................................... 84
Range test..................................................... 88
Helicopter model ................................................ 92
Binding type .................................................. 93
Binding receivers........................................... 94
Range test..................................................... 99
»Model type«........................................................ 104
»Helicopter type«................................................. 108
»Servo adjustment«............................................ 112
»Stick mode«
Winged model .................................................. 114
Helicopter model .............................................. 116
»Control adjust«
Winged model .................................................. 118
Helicopter model .............................................. 122
Throttle limit function ................................... 128
Idle setting................................................... 129
Throttle limit in combination with AR
in the »Stick mode menu«......................... 131
»Dual Rate / Expo«
Winged model .................................................. 132
Helicopter model .............................................. 136
»Channel 1 curve«
Winged model .................................................. 140
Helicopter model .............................................. 143
»Switch display«.................................................. 146
»Control switch«.................................................. 146
»Logical switches«.............................................. 150
How do I program a flight phase?.......................... 152
»Phase settings«
Winged model .................................................. 154
Helicopter model .............................................. 158
»Phase assignment«........................................... 160
»Phase trim« (winged model)............................... 162

3
Table of contents
»Non-delayed channels«.................................... 163
»Timers (general)«............................................... 164
»Flight phase timers«.......................................... 168
What is a mixer...................................................... 171
»Wing mixers«..................................................... 172
1 aileron............................................................ 175
1 aileron and 1 camber flap.............................. 176
2 ailerons.......................................................... 178
2/4 ailerons and 1/2/4 camber flaps ................. 180
»Helicopter mixer«.............................................. 190
Adjusting the throttle and pitch curve ............... 202
Autorotation setting........................................... 206
General remarks about freely progr. mixers .......... 208
»Free mixers«...................................................... 209
Linear mixers.................................................... 213
Exponential mixers ........................................... 215
Examples.......................................................... 218
»MIX active/phase«.............................................. 220
»Mix only Channel«............................................. 221
»Dual mixer«........................................................ 222
»Swashplate mixer«............................................ 223
»Fail Safe«............................................................ 224
»Teacher/pupil«................................................... 226
Connection schematic ...................................... 229
Wireless HoTT system ..................................... 230
»Transmitter output«........................................... 234
»Pro-trim«
Winged model .................................................. 236
Helicopter model .............................................. 238
»Trim memory«
Winged model .................................................. 240
Helicopter model .............................................. 242
»Telemetry«.......................................................... 244
Important notes ................................................ 244
Setting & dataview............................................ 246
Satellite mode of two receivers ................... 255
Sensor/s ...................................................... 257
Selecting sensor/s ............................................ 258
RF status view.................................................. 259
Select voice update .......................................... 260
»Channel sequence«........................................... 262
»Multichannel«..................................................... 264
»Ring Limiter«...................................................... 268
»MP3-Player«....................................................... 272
»Basic settings«.................................................. 275
»Servo display«................................................... 282
»Servo test«......................................................... 283
»Code lock«......................................................... 284
»Info display«....................................................... 286
Programming examples
Introduction............................................................ 288
Winged model
First steps......................................................... 290
Incorporating an electric drive .......................... 296
C1 stick switchover between
Electric motor and butterfly.......................... 300
Electric motor and airbrake ......................... 303
Timer activation by control or switch................. 304
Parallel operating servos.................................. 306
Using flight phases
Example 1 ................................................... 308
Example 2 ................................................... 312
Control of temporal processes ......................... 318
Delta and flying wing models............................ 320
F3A model ........................................................ 324
Helicopter model.................................................... 328
Appendix
FCC declaration..................................................... 342
Conformity declaration........................................... 343
Guarantee certificate ............................................. 344
Warning and notice
symbols
and their meaning
WARNING:
This symbol highlights the adjacent or follow-
ing instructions, which absolutely must be
adhered to by the user! Any disregard of
these instructions, can affect the safe opera-
tion and safety of the operator as well as
bystanders.
ATTENTION:
This symbol highlights the adjacent or follow-
ing instructions which must be observed by
the user! Any disregard of these instructions
can lead to damage of any kind, loss of guar-
antee and so on.
This symbol without specific headline empha-
sizes the adjacent or following notes and tips
which should be strictly observed by the user!
Any disregard of these instructions and tips
can result in damage of any kind.
This symbol highlights hints and tips of all
kinds, which should be observed by the user.
This symbol highlights information about
cleaning the device, which should be strictly
observed by the operator in order to ensure a
long life of the device.

4Safety notices
Safety notices
Be sure to pay attention!
In order to enjoy your modelling hobby for a long time,
please read these instructions thoroughly and give
particular attention to the safety notices.
If you are a beginner with remote controlled model
aircraft, ships or cars, you should really ask an expe-
rienced model pilot for assistance.
INTENDED USE
ATTENTION:
This remote control system may only be
used for the purpose intended by the
manufacturer, i.e. for the operation of
unmanned remote controlled models. Any other
usage is not permissible and can cause damages
to the remote control system, to other things and/
or to the people. For damages derived from other
use we offer no warranty and take no liability.
ATTENTION:
NOT SUITABLE FOR KIDS UNDER 14
YEARS OLD, SAFETY IS NO ACCIDENT
and REMOTE CONTROLLED MODELS ARE
NOT TOYS
… because even small models can cause substantial
property damage and/or personal injuries if they are
not handled properly - even if caused by third parties.
This manual is an important part of the set, it
contains important information for a proper
and safe use and maintenance. If this remote
control system changes ownership, these instructions
should surely be included with remote control system.
Failure to comply with the operating instruc-
tions and the safety instructions will void the
warranty.
Other notes and warnings
Technical defects of an electrical or mechanical na-
ture can lead to unexpected startup of a motor and/or
parts being hurled through the air to pose a danger of
injury to you and to others.
Short circuit conditions are to be avoided absolutely!
A short circuit condition may not only destroy parts
of the remote control system but, depending on the
circumstances and the battery energy involved, may
also pose acute danger of incineration or even explo-
sion.
All motor-driven parts, such as aircraft or ship propel-
lers, helicopter rotors, open gearboxes etc. represent
a constant danger. Contact with these parts must be
avoided. A rapidly turning aircraft propeller can, for
example, sever a finger. Also pay attention that other
objects do not come into contact with driven parts.
When a drive battery is connected or a motor is
running: never get into the danger zone of driving
mechanisms.
Be sure to pay attention that motors do not start up
unintentionally while performing programming opera-
tions. Disconnect the fuel supply or battery terminals
to motors before programming.
Protect all units from dust, dirt, moisture and other
foreign parts. Never expose these units to vibrations
or excessive hot or cold temperatures. Remote con-
trol operation may only be performed under “normal”
outdoor temperatures, i.e. within a range of -10°C to
+55°C.
Avoid mechanical jarring and pressure stresses. Al-
ways check units for damage to housings and cables.
Do not use units which have been damaged or be-
come wet, even after they are dry again.
Only those components and accessories which we
recommend may be used. Always use original Graup-
ner plug and jack connectors which are made for one
another out of the same materials.
When routing cables, pay attention that they are not
stressed, unduly kinked or broken. The sharp edges
of adjacent parts also represent a hazard for insu-
lated conductors.
Be sure that all plug and jack connections are firmly
seated. Do not pull on the cable to disconnect a
plugged connector.
No modifications whatsoever may be made to units.
Modifications will void the operating permit and all
insurance protection. If necessary, send the device
concerned to your local Graupner Service Centre;
see page 343.
Installing the receiver
The receiver is to be installed with a cushion
of foam rubber to afford protection against
jarring; in aircraft models behind a strong rib,
for a car or ship model the location must be protected
against dust and spray water. However, do not en-
close your receiver completely, otherwise it may
overheat in use.
The receiver may not be mounted in direct contact
with the hull or chassis as this would allow motor
vibrations and/or roadway jarring to be transferred
directly to the receiver. When a receiver system is
installed in a model with a combustion motor, all
receiver parts should always be protected against the
intrusion of exhaust gases and oil residue. Above all,
this applies to the model’s ON/OFF switch, which is
typically built into the model’s outer surface.
Position the receiver such that connecting cables to
the servos and the power supply are routed with a bit
of slack and that the receiver’s antennas are at least
5cm away from any large metal parts or wiring except
for other receiver wires/cables. In addition to steel,
this also includes carbon fiber parts, servos, electric
motors, fuel pumps and all sorts of cables, etc.
Optimally the receiver should be placed at a readily
accessible location that is well away from all other

5
Safety notices
Pay attention that no metal parts, e.g. as a result of
rudder actuation, vibration, rotating parts, etc., rub
against one another. Metal-to-metal contact causes
electrical “noise” which can interfere with the correct
operation of the receiver.
Transmitter antenna orientation
Transmission field strength is minimal in an imaginary
line extending straight out from the end of the trans-
mitter’s antenna. This means that “pointing” the trans-
mitter’s antenna directly toward the model will not
produce good reception but rather degrade reception.
When multiple remote controls are operating simulta-
neously, pilots should position themselves in a loose
group. Pilots standing off to themselves not only en-
danger their own models but those of others as well.
However, when 2 or more pilots using 2.4 GHz remote
control systems are closer than 5m to one another
this can lead to return channel overdrive which, in
turn, will trigger a range warning much too early.
Increase your distance between one another until the
range warning ceases.
Pre-start checks
Before switching the receiver on, be sure the throttle
control is at its Stop/Idle position.
Always switch the transmitter on rst
and then the receiver.
Always switch the receiver off rst
and then the transmitter.
If this sequence is not maintained, such that the
receiver is still switched on when the corresponding
transmitter is switched to “OFF”, then the receiver
may respond to other transmitters or general radio
frequency noise. This can cause the model to execute
uncontrolled operations that may cause personal
injuries and/or property damage.
In particular, for models equipped with a mechanical
gyro:
before switching off the receiver, disconnect the
model’s power supply to prevent the motor from rev-
ving up unintentionally.
The residual spin of a gyro often produces
so much voltage that the receiver may
falsely interpret a throttle signal! This will
then cause the motor to start up unexpect-
edly.
WARNING:
If this order is not respected, that the receiver
is turned on, but the corresponding transmit-
ter is “OFF”, the receiver could respond by
other transmitters and any interference.
The model can be run as a result uncontrolled steer-
ing movements, thus possibly causing property dam-
age and / or personal injury.
In particular with a mechanical gyro for models:
Before you switch your receiver off, make sure by
interrupting the power supply, that the motor can not
run up unintentionally.
An expiring gyro can generate such a voltage that
the receiver picks up as an apparently valid throt-
tle command. Then, the motor may start uninten-
tionally!
Range test and function test
Perform checks for proper operation and
range before every session. Secure the mod-
el adequately in place and ensure that no one
is in front of the model.
Perform a complete functional test on the ground and
execute a complete simulated flight to exclude the
possibility of system faults or problems with the mod-
el’s programming. When doing this, be sure to follow
the notices provided on pages 88 and 99.
Never operate the transmitter in Model mode, i.e.
for flying or driving, without an antenna. Be sure the
antenna is firmly seated in its socket.
equipment. Under no circumstances may a servo
cable be wrapped around the antenna or routed close
to it.
Make sure that cables near the antenna cannot move
about during flight.
Routing the receiver’s antennas
The receiver and its antennas must be positioned
as far away as possible from drives of any kind. If
the model’s hull is made of carbon fiber material, the
ends of the antennas must extend outside of the hull.
If your model features a carbon fibre fuselage, the
aerial tips must always extend outside the fuselage
for a length of at least 35mm. If this is not possi-
ble, it is essential to substitute longer aerials for the
standard ones (approx. 145mm long) fitted to HoTT
receiver(s).
The orientation of the aerial(s) is not critical, but
it is advantageous to install one receiver aerial in
a vertical–upright – position in the model. If your
receiver is a Diversity type – two aerials – the active
tip of the second aerial should be positioned at 90°
to the tip of the first aerial, and ideally the distance
between the two tips should be greater than 125mm.
Servo installation
Always mount servos with the provided rubber vibra-
tion-damper parts, see “installation notes” on page
54. Only in this manner can these parts be pro-
tected against excessively hard vibrations.
Installing control rods
Control rods must be installed such that they operate
freely and smoothly. It is particularly important that
all rudder levers are able to move to their full limits,
i.e. not otherwise mechanically blocked.
In order to be able to stop a running motor at any
time, control rods must be adjusted such that the
carburettor tap is completely closed when the joystick
and trim lever are brought into their end idle position.

6Safety notices
Safety notices
WARNING:
If the range and functional test, and ight
simulation are not carried out in detail and
conscientiously, this may have undetect-
ed malfunction and / or reception failures result in
eg loss of control or even a crash of the model
and can lead to signicant things and / or person-
al injury as a result.
Operating a winged aircraft, helicopter, ship or
car
WARNING:
•
Never y over spectators or other
pilots. Never endanger humans or
animals. Never y in the vicinity of
high-voltage wires. Do not operate the model
in the vicinity of sluice locks or where real
boats or ships are operating. Do not operate a
model on public streets or highways, paths or
plazas, etc.
• Never switch the transmitter off whilst operat-
ing a model! If this should happen acciden-
tally, keep your nerve and wait until the trans-
mitter screen is entirely blank, i. e. until the
transmitter has shut down completely; this
takes at least three seconds. Do not switch
your transmitter on again until this has oc-
curred. If you neglect this, there is a risk that
the transmitter will “hang” immediately after
being switched on, and you will lose control
of the model. In this case your only recourse
is to switch the transmitter off again, allow it
to shut down completely, and then switch on
once more after the correct interval.
Aero-towing
WARNING:
When operating a powered tug, ensure
that the receiving systems in the two
models are always at least 50cm apart. We
recommend the use of satellite receivers in such
situations. If you neglect this, there is a chance of
interference from the downlink channel.
Monitoring transmitter and receiver batteries
You must stop running the model to recharge
the transmitter’s battery no later than when
low transmitter battery voltage triggers the
“Batt must be recharged!!” display and acoustic
signal.
Check the charge in batteries routinely, particularly
the receiver’s battery. Do not wait until the movements
of controlled mechanisms are noticeably slower.
Replace expended batteries before they cause prob-
lems.
The battery manufacturer’s charging instructions are
always to be followed, this includes mandatory ad-
herence to the length of charging time. Never leave
batteries being charged unattended.
Never attempt to charge primary batteries (non-re-
chargeable batteries) because they can explode.
All secondary batteries (rechargeable batteries) must
be charged before every session. To avoid short
circuit conditions, first connect the charger cable’s
banana plugs, polarity correct, into the charger and
thereafter connect the charger cable’s plugs to the
transmitter and receiver batteries.
Disconnect all power sources from the model when it
is not to be used for an extended period of time.
Never attempt to use defective batteries, damaged
batteries or mixed-type battery combinations as a sin-
gle group. Do not use mixed combinations of old and
new batteries or batteries of different manufacture.
Capacity and operating time
The rule: “capacity is reduced with every successive
recharging”, applies to all batteries. Internal resist-
ance increases at low temperatures to further reduce
capacity. As a consequence, the battery’s ability to
provide current and hold its voltage is reduced.
Frequent charging or the use of battery maintenance
programs can also result in gradual loss of battery
capacity. Therefore the capacity of batteries should
be checked at regular intervals, not in excess of every
six months, and replaced if performance is found to
be significantly deficient.
Purchase only genuine Graupner batteries!
Interference suppression for electric motors
All conventional electric motors produce
sparks between their collector and brushes.
Depending on the type of motor involved, this
may cause more or less interference with the func-
tionality of the remote control system.
The electric motors of a properly built system should
therefore have interference suppression features. For
electric drive models it is particularly important that
every one of its motors is provided with proper inter-
ference suppression. Interference filters extensively
suppress such disturbances and should always be
included.
Follow the respective recommendations included in
the motor’s operating and installation notices.
For further details about interference filters, refer to
the Graupner RC main catalog or in Internet at
www.graupner.de.
Servo interference lters for extension cables
No. 1040
The servo interference filter is necessary when an
extended-length servo cable is used. This filter is at-
tached directly to the receiver output. In critical cases
a second filter can be attached to the servo.

7
Safety notices
Using electronic speed controllers
Choosing the right electronic controller is largely a
matter of matching controller performance to the mo-
tor to be controlled.
In order to prevent an overload or damage to the
speed controller, its current rating should be at least
half of the maximum locked-rotor current draw of the
motor to which it is connected.
Particular attention is appropriate for so-called “tuning
motors”. Because of their low-turns coils these motors
can draw a multiple of their rated current in a locked-
rotor condition and this can lead to the destruction of
the speed controller.
Electric ignition systems
Combustion motor ignition systems also produce
interference that can negatively influence remote
control functionality.
Always supply power to an electric ignition system
from a separate, dedicated battery.
Use only interference-suppressed spark plugs, spark
caps and shielded ignition leads.
Mount the receiver sufficiently far away from ignition
system components.
Static charges
WARNING:
A remote control system will be destroyed
by the magnetic shock waves produced
by a lightning strike–even if the storm is
miles away. Therefore, stop ying right away if a
storm is approaching. Static charging via the
antenna also represents a lethal hazard.
Attention
• In order to fulfill FCC HF emission require-
ments for mobile transmitters, a distance
of at least 20cm must be maintained
between this system’s antenna and other persons
when this system is operating. Operation of this
system at a lesser distance is therefore not recom-
mended.
• To avoid disturbance caused by the electrical
characteristics and emissions of other transmit-
ters, keep at least a 20cm distance from other
transmitters.
• Operation of the remote control system requires a
correct program setting for the given country in the
transmitter unit. This is necessary for compliance
with diverse regulations like FCC, ETSI, CE etc.
Follow the respective instructions provided for this
with the transmitter and receiver.
• Prior to every flight, perform a complete functional
test, range test and execute a complete simulated
flight in order to exclude the possibility of system
faults or problems with the model’s programming.
• Never program the transmitter or receiver while
the model is being operated.
Care and maintenance
P
Never clean the housing, antenna, etc. with
cleaning agents, gasoline, water or similar
means. Use only a dry, soft cloth.
Components and accessories
WARNING:
As manufacturer of this equipment Graup-
ner GmbH & Co. KG recommends only com-
ponents and accessories which have been
tested and approved by Graupner for their suitability,
functionality and safety. If this recommendation is
followed, Graupner accepts responsibility for the
product.
Graupner cannot accept any responsibility for
the parts or accessories of other manufacturers
which have not been approved and Graupner
cannot evaluate every individual product made by
other companies to assess if they are safe to use.
Liability exclusion / damage compensation
This manual serves only as a source of information
and can be changed without prior notification. Graup-
ner accepts no responsibility or liability for errors or
inaccuracies which may be contained in this manual.
Graupner cannot monitor compliance with the as-
sembly instructions, the operating instructions or the
conditions and methods under which remote control
components are installed, operated, utilized or main-
tained. Therefore Graupner accepts no form of liability
for loss, damage or costs consequential to incorrect
usage or operation or which can be attributed to
same.
Unless otherwise prescribed by law, the obligation of
Graupner to provide damage compensation, regard-
less of legal grounds, is limited to the invoice value of
the quantity of Graupner goods contributing directly
to the damage-inducing event. This does not apply if
Graupner is found to be subject to unlimited liability
pursuant to binding legal stipulations with respect to
intent or gross negligence.
Furthermore we will only consider claims
if a log le is present; see page 26 un-
der “Data recording” so as page 159
under “Flight time”. For the same reason the
transmitter must always be updated to the latest
software status.
Keep in mind, however, that for technical reasons
during playback of MP3 les NO data recording is
possible.
It is essential that you register at https://www.graup-
ner.de/en/service/product_registration.aspx to ensure
that you are constantly informed of important soft-
ware updates.This is the only means by which we
can automatically keep you aware of new updates by
e-mail.

8Safety notices
Safety notices and handling regulations for Lithium-Ion
(LiIo) and Lithium-Polymer (LiPo) batteries
As applicable for all highly technical products, obser-
vance of the following safety notices and handling in-
structions is essential for a long service life, fault-free
operation, and harmless utilization of lithium/polymer
batteries.
These instructions are to be safeguarded. If the unit is
transferred to another user, these instructions should
certainly be passed along to the new user.
LiIo-/LiPo batteries require particularly attentive han-
dling. This applies to charging, discharging as well
as for storage and other handling. Adherence to the
following special specifications is necessary:
Special notices for charging LiIo-/LiPo batteries
from Graupner
WARNING:
• Since Graupner GmbH cannot supervise
the correct charging and discharging of
cells, the entire guarantee is void in cases
of improper charging or discharging.
• Only approved chargers with appropriate charging
cables may be used for charging LiIo-/LiPo bat-
teries. Any manipulation to the charger or charger
cables can lead to severe damage.
• The maximum charging capacity must be limited
to 1.05 times the battery’s capacity.
Example: 700mAh battery = 735 mAh max.
charging capacity
• Use only the outlet-charger included with the set
or a specially designed charger/discharger from
Graupner to charge and discharge LiIo-/LiPo bat-
teries, refer to page 18 or www.graupner.de.
• Ensure the settings for the number of cells or for
final charging voltage and final discharge volt-
age are correct. Be sure to observe the operating
instructions for your charger/discharger.
• Under these conditions Graupner LiIo-/LiPo bat-
teries can be charged with a maximum of 2C (the
value 1C corresponds to the cell capacity) charg-
ing current. At a voltage of maximum 4.2V per cell
and above, charging must continue a constant
voltage of 4.2V per cell until charging current
drops below 0.1 … 0.2A.
• The permissible temperature range for charging
and storing LiIo-/LiPo batteries is 0 … +50 °C.
• Never leave batteries being charged unattended.
• The battery to be charged must be placed on a
non-combustible, heat resistant, non-conducting
surface during the charging process. Combustible
or readily ignited objects are to be kept away from
the charging configuration. Batteries may only be
charged under supervision.
• Avoid short circuit. Never pierce a LiIo/LiPo bat-
tery, by doing it you may cause a short circuit and
a fire, explosion and other problems.
• Charging voltage over 4.20V per cell must be
avoided absolutely as the cell would otherwise be
permanently damage and could cause a fire. In or-
der to prevent the over-charging of individual cells
in a pack, a cut-off voltage between 4.1 … 4.15V
per cell should be set to increase service life.
• Incorrect handling can lead to explosions, fire,
smoke and poisoning hazards. Furthermore,
disregard for instructions and warnings can lead to
performance losses and other defects.
• Before every use check the state of your batteries.
Damaged or ruined batteries or cells should not
be used.
• LiIo/LiPo batteries contain electrolytes and elec-
trolyte vapours which are unhealthy. Never enter in
touch directly with electrolytes. In case of contact
with eyes, skin or other parts of the body, wash
soon with a lot of water and call soon a doctor.
• The battery’s capacity is reduced by every charge/
discharge cycle. Storing the battery at tempera-
tures which are too high or too low can also lead
to a gradual reduction in capacity. In model opera-
tion, battery capacity drops to about 50 … 80 %
of new battery capacity after about 50 charge/dis-
charge cycles–even though all charge/discharge
rules are followed. This is due in part to the high
discharge currents and inductive currents caused
by motors.
• Never attempt to charge battery cells with the
wrong polarity. Abnormal chemical reactions
take place when batteries are charged with re-
versed polarity and the battery will be useless.
This can cause breaks, smoke and ames.
• Battery packs may only be connected in series or
parallel in exceptional cases as cell capacities and
charged state can differ too greatly. This is why the
battery packs we deliver are selected.
• LiIo-/LiPo batteries connected in series within
a pack may only be charged as a group if the
voltage of individual cells do not differ by
more than 0.05 V. The LiIo battery included
with the set is equipped with a special safety
circuit such that “compensation” for voltage
differences between individual cells, by way of
an otherwise typical balancer plug connection,
is not necessary.
• Individual battery cells and batteries are not toys
and must therefore not get into the hands of chil-
dren. Batteries/cells must be kept out of the reach
of children.

9
Safety notices
• Batteries must not get into the vicinity of babies or
small children. If a battery is swallowed, immedi-
ately go to a doctor or emergency medical facility.
• Batteries must not be put in a microwave oven or
put under pressure. Smoke, fire and more can be
the consequences.
• Never dismantle a LiIo-/LiPo battery. Dismantling
a battery can cause internal short-circuits. Gas,
fire, explosions and other problems can result.
• The electrolyte and electrolytic vapors in LiIo-/LiPo
batteries are harmful. Absolutely avoid all direct
contact with electrolytes. If electrolytes come into
contact with skin, eyes or other body parts, im-
mediately wash out or rinse out with generous
amounts of fresh water then be sure to consult
a doctor.
• Batteries built into equipment must always be
removed from that equipment when it is not cur-
rently in use. Always switch off equipment after it is
used to prevent deep discharging. Always charge
batteries before it is too late. Store batteries on a
non-combustible, heat resistant, non-conducting
surface! Deep-discharged LiIo-/LiPo batteries are
defective and may no longer be used!
Storage
LiIo-/LiPo cells should have a 10 … 20%
charge capacity when stored. If cell voltage
drops below 3V, then LiIo-/LiPo cells must
absolutely be recharged to a capacity of 10 … 20%
of full capacity. Otherwise, further deep-discharging of
the battery will make it useless during storage in a
discharged state.
Special notices for discharging LiIo-/LiPo
batteries from Graupner
• A continuous current rate of about 1C
does not represent a major problem for
Graupner LiIo-/LiPo batteries. For larger
currents, please follow the catalog specifications.
In any case, observe the maximum current rating
for the connector system, see maximum discharge
current on the battery.
• Discharging below 2.5V per cell damages cells
permanently and is therefore to be avoided abso-
lutely.
Short circuit conditions are to be avoided
absolutely. Permanent short circuits lead to
destruction of the battery, high temperatures and
perhaps even self-ignition may follow.
• During discharge, battery temperature must not
rise, in any case, to over +70°C. Otherwise, better
cooling or a lower rate of discharge must be in-
troduced. The temperature can easily be checked
with the infrared thermometer, No. 1963. The bat-
tery must never be discharged via the transmitter’s
charging socket. This socket is not suitable for this
purpose.
Other handling notices
• Never short-circuit the battery. A short-
circuit allows very high current to flow and
this heats up the cells. This will lead to
loss of electrolyte, the production of gases and
perhaps even explosions. In the vicinity of, or while
handling, Graupner LiIo-/LiPo batteries, avoid
electrically conducting surfaces because of the
danger of creating a short-circuit condition.
• Battery packs may only be connected in series or
parallel in exceptional cases as cell capacities and
charged state can differ too greatly. This is why the
battery packs we deliver are selected.
Handling connectors
• These connectors are not as robust as for
other batteries. This applies particularly to
the plus pole connector. The connections
can easily be broken off. Due to thermal transfer,
the connector tabs may not be soldered directly.
• The connections of LiLo / LiPo batteries are not
as robust as those of other batteries. This applies
in particular to the positive pole connection. The
connections can easily break off.
Cell connection
Direct soldering on battery cells is not
permitted.
The heat of direct soldering can damage
battery components, such as separator or isolator.
Battery connections should only be made by
industrial spot welding. A professional repair made
by the manufacturer or distributor is necessary to
replace missing or torn-off cables.
Replacing individual battery cells
The replacement of battery cells may only be
made by the manufacturer or distributor and
never by the user himself.
Damaged cell usage
Damaged cells may never be used or
returned to service.
Characteristics of damaged cells include:
damaged housing packing, deformed battery cells,
electrolyte or leaking electrolyte. In these cases,
further use of the battery is not permissible.
Damaged or useless cells are hazardous waste items
and must be appropriately disposed.
General warning notices
Batteries must never be put in fire or burned.
Battery cells must not be submerged in liq-
uids, such as water, seawater or beverages.
Any contact with liquids, of whatever nature, is to be
avoided.

10 Foreword
Notes for environmental protection
Notice for remote control set mc-32 HoTT
No. 33016 / 33020
These radio control sets are fitted as stand-
ard with a LiIo transmitter battery with integral
protective circuit (changes reserved). Once
the factory preset voltage limit of 3.60V has been
reached, a warning will appear in the display.
Disposal of used batteries
Some countries have laws requiring that all
used batteries be turned over to an author-
ized collection centre.
Disposing of batteries along with common household
garbage is forbidden. Old batteries can be turned into
communal collection centres for disposal at no charge
or they can be returned to one of our dealerships or
anywhere else where batteries of that given type are
sold. Used batteries we have delivered can also be
sent back to us, at your cost, through the mail. Use
the return address below:
Graupner GmbH
Service: Used batteries
Henriettenstr. 94-96
D-73230 Kirchheim unter Teck
This represents an essential contribution to environ-
mental protection.
Caution:
Damaged batteries require among
other things, special packaging,
because they are very toxic!
Environmental protection notices
The symbol on this product, its operating
instructions or packaging gives notice that
this product may not be discarded as com-
mon household waste at the end of its service life. It
must be turned over to a recycling collection point for
electric and electronic apparatus.
The materials can be recycled according to their
markings.You make an important contribution to
protection of the environment by utilizing facilities for
reuse, material recycling or other means of exploiting
obsolete equipment.
Batteries must be removed from the
unit and disposed of separately at an
appropriate collection point.
Please inquire with local authorities
about the responsible waste collection
locations.
This manual serves only as a source of infor-
mation and can be changed without prior noti-
fication. Graupner accepts no responsibility or
liability for errors or inaccuracies which may be con-
tained in the information section of this manual.

11Remote control set description

12 Remote control set description
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 theoreti-
cally permit over 200 models to be operated at the
same time. However, because of the interspersed
radio-frequency utilization permitted by certification
for the 2.4 GHz ISM band, this number is significantly
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 fac-
tor is–as often before– is still likely to be the size of
available operating space (i.e. airspace for aircraft).
Alone the fact that it is no longer necessary to coor-
dinate transmitting frequencies with other pilots in the
vicinity (which is sometimes quite difficult 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
modules.
Based on the mc-24 Graupner/JR computerized
remote control system, the mc-32 HoTT remote
control system has been especially developed for ex-
perienced RC pilots All conventional model types can
be readily operated with the mc-32 HoTT system,
regardless of whether the model is a winged aircraft,
helicopter, ship or land vehicle.
Complex mixed-control functions of guiding surfaces
are often necessary for winged aircraft (rudder, eleva-
tors) and helicopter models (swashplate). Thanks to
modern computer technology, very diverse model
requirements can be programmed in the simplest
conceivable manner with touch-sensitive keys (CAP
Touch). Simply select the given model type from the
mc-32 HoTT program and its software will assem-
ble all significant mixer functions and coupling func-
tions automatically. This eliminates the need for sepa-
rate modules in the transmitter to implement complex
coupled functions and also makes sophisticated
mechanical mixer mechanisms in the model unnec-
essary. For example, this makes the mc- 32 HoTT
transmitter fully equipped with both software and
hardware to operate the well-known NAUTIC modules
on the receiver side. The “channel sequencer” is new.
It permits the operation of up to three servos to be
automated.
The mc-32 HoTT system offers optimal security
and reliability without having to forgo great operating
convenience. The mc-3 2 HoTT remote control sys-
tem has 80 model memory locations. Additional flight-
phase-specific 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 flight 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 subse-
quent evaluation on a PC.
Since the mc-32 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 particu-
larly 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 exper-
tise 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 specific technical terms, like transmitter con-
trol, dual rate, butterfly, and so on.
Please observe the safety notices and technical
notices. Read through the instructions attentively.
Before usage, test all functions by simply attaching
servos to the receiver included in the set. While doing
this, observe respective notes on page 68. This will
help you learn the essential operating techniques and
functions of the mc-32 HoTT.
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 mc-3 2 HoTT, the newest gen-
eration of remote control systems.
Kirchheim-Teck, july 2015

13
Remote control set description
mc-16 and mc-20 series computer systems
two remote control sets with 2,4-GHz-Graupner-HoTT technology
(Hopping Telemetry Transmission)
Technology that enthralls.
The superior functional security of Graupner
HoTT technology accomplished with bidirectional
communications between transmitter and receiv-
er with integrated telemetry, freely programmable
voice output via headset connector, and ultra-fast
response times.
Simpli ed programming using capacitive touch-
buttons on the mc-20 HoTT and four-way push-
buttons on the mc-16 HoTT.
High-contrast eight-line graphic screen provides
a clear display of all set-up parameters. Switch-
able blue backlighting. The mc-20 HoTT fea-
tures an independent second screen for display-
ing telemetry data. Storage of telemetry data on a
micro SD memory card.
USB connection to read and write the model’s
memories as well as for making rmware up-
dates.
• Integrated Graupner HoTT 2.4 GHz transmission
system
• The high-speed primary processor is used for data
transfer, ensuring ultra-fast response times. No
additional delays through detours via a module
processor.
• Maximum interference immunity made possible by
optimized frequency hopping through as many as
75 channels and wider channel spread
• Intelligent data transfer with correction function
• Over 200 systems can be used simultaneously
• The HoTT technique of bidirectional communica-
tion between sender and receiver, as well as the
fastest possible transmission rate (10ms) assures
extremely short reaction times.
• Modulation can be switched by software: when
necessary, you can switch from “HoTT” to “EXT.” or
“SP.” by pressing a button.
• Case incorporates integral patch aerial
• Transmitter features integral slot for SD and SDHC
memory cards, formatted to FAT or FAT32, for
saving log files, model programming data and sup-
plementary functions such as transmitter firmware
updates.
• Transmitter features alternative method of battery
charging via the USB socket.
• 6 different languages (Dutch, English, French,
German, Italian and Spanish) available per soft-
ware update.
• Simplified arrangement of operating elements,
such as joysticks, external switches, proportional
controls and trim levers as control functions
• CONVENIENCE MODE SELECTOR to simplify
changeovers between operating modes 1 … 4
(e.g. throttle left/throttle right)
• Extremely wide receiver operating voltage range
of 3.6V to 8.4V (functional to 2.5V)

14 Remote control set description
• As many as four servos can be controlled simulta-
neously as a block in the SAME operating mode
with a servo cycle time of 10 ms (digital servos
only).
• Thanks to cycle time reduced down to as little as
10 ms, extremely short response times are achieved.
• Real-time telemetry evaluation in the transmitter
display Additionally, telemetry data can also be
selectively displayed by the SMART-BOX.
Additional HoTT features of the mc-32
• Super-fast response time through use of a fast
main processor for data transmission.
• Micro-SD card for storage of telemetry data and
for additional functions
• Obsolescence-proof through update capability over
USB interface as well as via the micro-SD card
• The included Lilo battery (changes reserved) has
a capacity of over 6000 mAh. This makes extreme-
ly long flight times possible and also reduces the
number of charging repetitions.
• Modulation changeover per software: e.g. from
"EXT. PPM" (e.g. Weatronic) to HoTT at the press
of a button.
• Swashplate limiting: This function limits the
swashplate's tilt angle to prevent the potential for
mechanical collision in helicopter 3D operation at
full-limit roll and pitch-axis
• Ring-limiter: functions similar to swashplate limi-
tation but is used for control of up to three Voith-
Schneider drives in ship models
• Channel sequencer for automating servo motion
sequences of up to three servos, e.g. to automate
the lowering of landing gear or to extend/retract
drives in self-launching gliders
• Multi-channel function for operating Graupner
product line NAUTIC modules
• Digital trimming with pseudo »analog« endless
pinions, effective per specific flight-phase
• Auto-trim function. The current stick positions
for trimming fixed-wing or helicopter models will
be stored in trim memory at the press of a but-
ton. (Model »compensation«, activate switch and
release stick. The correction will be blended in
»gently« upon return of the stick.
• C1 changeover, brake/elec. motor: This changeover
can be implemented very easily via enhanced flight
phase programming.The pilot determines the stick
positions (forward/rear) at which the motor is to
switched off or the airbrakes are to be retracted.
• 16 control functions maximum
• Simplified arrangement of operating elements,
such as sticks, external switches, proportional
controls and trim levers as control functions
• Protection against obsolescence is provided by
virtue of a fast 32-bit operating system with mod-
ern flash memory that can be updated.
• Blue back-lighted MULTI-DATA-GRAPHIK-LCD
monitor with significantly better legibility under
unfavorable light conditions
• CONVENIENCE MODE SELECTOR to simplify
changeovers between operating modes 1 … 4
(e.g. throttle left/throttle right)
• Twelve freely programmable mixers for fixed-wing
or helicopter models, each with freely selectable
input and output functions; four curve mixers with
innovative 8-point curve technology for easy to set
and adjust curve values at up to eight points for
throttle, pitch, tail or other non-linear character-
istics. The arithmetic unit in the CPU employs an
ingenious method of calculating polynomial ap-
proximations for truly-rounded, ideal MPC (multi-
point curve) mixer curves
• Shifting curve mixer points can be done along
both axes with the CAP touch pad keys
• Eight flight-phase programs can be individually
adapted for each model and given a name. The
As many as four servos can be controlled simulta-
Auto-trim function. The current stick positions
Computer System mc-32
32 channel remote control set in 2.4 GHz Graupner-HoTT technology
(Hopping Telemetry Transmission)
switchover time is programmable separately.
• SUPER SERVO menu with a perfect overview of
all servo setting data and simple parameter cor-
rection at four "levels": direction of rotation, mid-
point setting, separate servo travel on both sides
and separate travel limiting on both sides for 16
servos with a total of 96 setting options
• SUPER-DUAL-RATE, EXPO and EXPO/DUAL-
RATE menu with 36 potential setting variants for
three servo functions and six flight phases
• Practice-optimized multi-function menu for aero-
foils and helicopter models. Entry of the number
of aileron and flap servos automatically programs
all necessary mixer functions in the multi-function
"Wing mixers" menu. Differential aileron mixer,
butterfly mixer, dual-flap mixer, automatic gyro set
function and other special functions
• Helicopter swashplate mixer for 1, 2, 3, or 4 point
steering.
• Selectable cycle time: 10 ms or 20 ms/30 ms,
depending on receiver and operating mode
• A convenient timers menu with a system of eight
stopwatches, alarm timer, countdown timer, laps
counter and so on. Two running timers and one lap
timer can be displayed at the same time in large
characters.
• Stopwatch with history: In addition to the lap coun-
ter there is a "Time 1" which captures the switch-
on time and a "Time 2" which records the ON and
OFF times separately
• Channel mapping in the receiver allows free distri-
bution of control functions.
• The travel distance and rotation direction settings
integrated into the receiver make it possible, for
example, to match up mapped servos with one
another
• The programmable fail-safe functions »Hold«,
»Off« and »Move to preset positions« that are built

15
Remote control set description
into the receiver for every individual servo channel
can be set separately
• A slot for FAT or FAT32 formatted SD and SDHC
memory cards is available on the transmitter for
log files and model programs
Model programs
• Transmitter operating time timer
• Flight phase switch assignments: six switches, two
with a priority function. Every switch combination
can be named freely. This makes the number of
flight phases independent of the number of flight
phase switches.
• Tail type normal, V-tail, Delta/flying-wing and 2 HR
Sv 3+8 (which immediately makes two coupled
elevator servos available without using free mixers
or dual mixers)
• Flap count 4 AIL/4 FL: Full support of eight wing
servos, even without use of free mixers
• Flight phase switching cutoff delay:
the delay time can be switched off for individual
channels on a flight-phase basis (e.g. for motor
off in electric models or to activate/deactivate
helicopter head lock).
Ten additional, user definable phase names: aside
from the prescribed flight phase names, the user
can also freely assign up to ten phase names of
his own choice.
• Enhanced transmitter control menu: option to as-
sign input-side mid-point setting for C1 control +
trim as a transmitter control. A single input can be
assigned to two switches for a true 3-way switch
function.
• Wing mixers: New concept for the multi-flap menu
to simplify settings of one to eight wing servos on
a flight-phase specific basis in a comprehensible
manner without requiring the use of free mixers
• »Info« sub-option in the Base setup model menu
Any kind of additional information about every
model can be entered here. This additional in-
formation will then appear in the newly designed
model select function
• »Logical switches«: this function permits two
switches to be coupled as »and« or »or« logic
functions. The result can be employed as a virtual
switch.Typical application: The activation of certain
functions should only be possible in conjunction
with other functions, e.g. wheel brake can only be
activated when the landing gear is down. A num-
ber of functions which are normally independent
of one another, are to be put in their base settings
by way of an »Emergency switch«. This program
automation can be activated by multiple switches
that also select the appropriate program.
• Servo-middle setting range extended to ±125%
• Number of flight phases: (fixed-wing: 8, helicopter:
7 + AR)
• Settable »Throttle too high« warning threshold
in the helicopter menu, programmable switch-on
warning
• Phase trim for all axes of fixed-wing models possible
• Servo occupancy swap on the receiver output
• CAP TOUCH operating elements with key lock
function to prevent unintentional operation.
• CAP TOUCH display change from the main menu
to the telemetry main menu via ESC.
• Numerous telemetry displays, programming func-
tions and evaluation functions are presented
directly in the transmitter's screen
• Graphic presentation of model icons for the model
type display (fixed-wing/helicopter)
• Built-in connector sockets for PC-USB interface,
headset, SMART BOX, external RF module,
DSC system. Prepared for teacher/pupil operation.
• Teacher/pupil system with or without cable for
complete transfer; all settings are made on the
teacher transmitter.
Additional functions
• Super Fast response time by using the fast main
processor for data transmission
• Binding of any number of receivers for channel
expansion
• Range: test and warning function
• Low voltage warning
• Selectable cycle time 10ms or 20ms / 30ms,
depending on the receiver and connected thereto
servo and transmitter-side mode
• Up to four servos in the SAME mode blocks with
a signal repetition time of 10 ms are driven simul-
taneously (only digital servos!)
• The reduced cycle time of up to 10ms an ex-
tremely short reaction time is achieved.
• Telemetry analysis in the transmitter display in
real time. In addition, the telemetry data can be
displayed either with the SMART-BOX.
• Numerous Telemetry displays, programming and
evaluation functions directly in the transmitter
display
• Software switchable modulation: If necessary,
deactivate by pressing a button of HoTT to “EXT.
PPM“ or ”SP Mode“.
• Using Channel mapping in the receiver arbitrarily
divisible control functions.
• Select integrated rotational direction setting for
example mapped servos receiver successive
• In the receiver, programmable fail-safe “Hold”
function, “Off” or “pre-set positions” for each indi-
vidual servo channel can be set separately
• Future-proof design with update fast 32-bit oper-
ating system with modern Flash memory

16 Remote control set description
Technical data for the mc-32 HoTT transmitter
Frequency band 2.4 … 2.4835 GHz
Modulation FHSS
Transmitter power 100 mW EIRP
Control functions 16 functions, 4 of these can be
trimmed
Temperature range -10 … +55 °C
Antenna collapsible
Operating voltage 3.2 … 4.8 V
Current draw about 500 mA
Range up to about 4 000 m
Dimensions about 252 x 252 x 60 mm
Weight about 1,685 g with transmitter
battery
Technical data for the GR-12L HoTT receiver
No. S1012
Operating voltage 3.6 … 8.4 V*
Current draw about 70 mA
Frequency band 2.4 … 2.4835 GHz
Modulation FHSS
Antenna 1 x about 145 mm long,
about 115 mm of this
length encapsulated and
about 30 mm active
Plug-in servos 6
Plug-in sensors 1 (port 5T)
Temperature range about -10 … +55 °C
Dimensions about 36 x 21 x 10 mm
Weight about 7 g
Accessories
No.
Description
72.40 Transmitter straps, deluxe
Teacher/pupil cable for mc-3 2 HoTT
see page 213
Replacement parts
No.
Description
71.26 Transmitter straps, Graupner HoTT
3080 Aluminum transmitter case, HoTT,
400x300x150 mm
33000.1 Transmitter battery, flat LiIo, single cell six-
pack/6000 3.7 V TX
33002.1 Micro-SD card, 2 GB for HoTT transmitter
33032.2 Transmitter metal hanger for mc-3 2
33032.3 Hand rests for mc-32 (2 pieces)
33801 HoTT transmitter antenna
Technical data for the GR-32 Dual HoTT receiver
No. 33516
Operating voltage 3.6 … 8.4 V*
Current draw about 140 mA
Frequency band 2.4 … 2.4835 GHz
Modulation FHSS
Antenna 2 x 2 diversity antennas,
about 145 mm long, about
115 mm of this length
encapsulated and about
30 mm active
Plug-in servos 16
Plug-in sensors up to four sensors
Temperature range about -10 … +55 °C
Range up to about 5 000 m
Dimensions about 63 x 30 x 14 mm
Antenna length 4 x wire 145 mm (active
antennae 30 mm)
Weight about 24 g
*
The speci cation for permissible operating voltage range
applies only to the receiver. Please note in this context
that receiver input voltage is applied without regulation to
connected servos but the voltage range for most connectible
servos (speed controls, gyros, etc.) is only 4.8 to 6 V.
The set, No. 33032, includes
• Microcomputer transmitter mc-32 HoTT with
built-in LiIo single cell six-pack/6000 mAh/3.7 V
transmitter battery (change reserved)
• Graupner HoTT 2,4 GHz FHSS module
• integrated Bluetooth ® v2.1+ EDR module
• Electric outlet charger (4.2 V, 500 mA)
• Graupner bidirectional receiver, GR-12L HoTT
(No. S1012) for connection of up to 6 servos and
GR-32 Dual HoTT (No. 33516) for connection of
up to 16 servos
• USB adapter/interface (No. 7186.6) including
suitable USB cable for connection to a PC and an
adapter cable for receiver updates
• Micro-SD card with an adapter for a card reader
• Sturdy aluminum transmitter case with foam cush-
ioning (No. 3080)
• Graupner HoTT transmitter strap
Other accessories in Internet at www.graupner.de.
Contact or visit your local dealer. He will be glad to
provide advice.
Technical data for the
mc-32
HoTT transmitter
Technical data for the GR-32 Dual HoTT receiver
The set, No. 33032, includes
Computer System mc-32
32 channel remote control set in 2.4 GHz Graupner-HoTT technology
(Hopping Telemetry Transmission)

17
For your notes

18 General operating notices
General operating notices
Transmitter
Transmitter power supply
The mc-32 HoTT transmitter is equipped with a
high-capacity, rechargeable LiIo 1s6p/6000 3.7V
TX battery (No. 33000.1) as standard equipment.
(changes reserved)
However, the standard built-in battery is
not charged upon delivery of the transmit-
ter.
When the transmitter is used, its battery voltage should
be monitored by way of the indicators provided in the
LCD display. If the voltage level preset in the "Battery
warning" line of the »General basic settings« menu,
page 279, (default setting 3.60 V) is underrun, an
acoustic signal will be sounded and a warning mes-
sage will appear in the display.
#01 0:00h
Stoppuhr
Flugzeit
K78
0:00.0
3.5V
0:00.0
00
0
0
0:00h
M
V
Batt must
be re-
charged!!
No later than now, operation must be terminated so
the battery can be charged again.
Note:
Be sure the correct battery type is set in the
»General basic settings« menu, page
260! The standard setting for this is
"Lith.".
Charge the transmitter battery with the plug-in
charger.
The transmitter's rechargeable LiIo battery can be
charged by way of the charger socket located behind
a cover on the left, front side of the transmitter –as
viewed from the front– with the included plug-in
charger (No. 32032.4).
Depending on the state of discharge, the included
plug-in charger (4.2V/500mA) requires up to about
15 hours to fully recharge the transmitter battery.
Never use plug-in chargers from other manu-
facturers or chargers intended for other bat-
tery types. Charger output voltage which is
too high or possibly even different plug polarity, see
further below, can cause immense damage. We
recommend that this plug-in charger be appropriately
labelled.
Also observe the safety notices provided on pages
4 … 7.
The transmitter must be switched "OFF"
during the entire charging procedure. Never
switch on the transmitter when it is connected
to the charger. Even a brief interruption to charging
can cause charging voltage to rise to a level that will
immediately damage the transmitter with over-volt-
age. Also for this reason, be sure all connectors are
always plugged in securely and have good contact.
Opening the transmitter housing
Switch off the transmitter before opening it
(power switch to »OFF«). Push both housing
base latches in the opposite the direction of
the arrow marks, toward the inside, to their limits.
Now tilt the transmitter somewhat to the rear so the
housing base can flip open and can be unhooked.
Close the transmitter's housing base by first hooking
it to the underside, flip the base closed then push
both latches toward the outside. When closing the
base, pay attention that no cables are pinched.
Notes:
• Make no modifications of any kind
to the circuit boards as this will
void the guarantee as well as the
unit's official permit.
• Be sure not to touch the circuit boards
with any metallic objects. Do not touch
contacts with your fingers.
• Before performing any tasks inside the
transmitter, disconnect the transmitter's
battery (see next page) to avoid potential
short circuit damage to the transmitter's
circuit boards.

19
General operating notices
Charging with automatic chargers
To achieve quicker recharging of the single cell LiIo
battery, Graupner automatic chargers can also be
used. The table below shows a selection of these
chargers.
Recommended chargers (accessory)
Order
No. Designation
Input voltage 220 V
Input voltage 12 V
suitable for
battery types
integr. balancer
NiCd
NiMH
LiPo/LiIo
lead battery
6411 Ultramat 8 x x x x x
6463 Ultramat 12 plus x x x x x x
6464 Ultramat 14 plus x x x x x x x
6466 Ultra Trio plus 14 x x x x x x x
6468 Ultramat 16S x x x x x x x
6469 Ultra Trio Plus 16 x x x x x x
6470 Ultramat 18 x x x x x x x
6475 Ultra Duo Plus 45 x x x x x x x
6478 Ultra Duo Plus 60 x x x x x x x
6480 Ultra Duo Plus 80 x x x x x x x
Charger cable, No. 3022 is additionally needed for the transmitter
and charger cable, No. 3021 is additionally
needed for the receiver.
Other charger units and details about the listed chargers can
be found in the Graupner RC main catalog or in Internet at
www.graupner.de.
The charger socket is equipped standard with a
diode to protect against reversed polarity. Original
Graupner automatic chargers also detect battery
voltage polarity.
Observe the configuration notices for the charger
used.
First connect the charger cable's banana
plugs to the charger and only then con-
nect the cable's other end into the charg-
ing jack on the transmitter. Never allow the bare
ends of the banana plugs to come into contact
with one another when the other end of the cable
is plugged into the transmitter.
Charging current may not exceed 1.5 A as other-
wise the diode, and perhaps other components,
could be damaged. If necessary, limit the current
at the charger.
mc-32 HoTT charging jack polarity
The charger cables on the market from other manu-
facturers often have different polarities.Therefore use
only an original Graupner charger cable, No. 3022.
Removing the transmitter's battery
To remove the transmitter's battery, first unlatch the
cover of the battery compartment on the rear side of
the transmitter housing then remove the cover.
Take out the transmitter's battery then disconnect the
transmitter battery's connector by carefully pulling on
the supply line cable.
Inserting the transmitter's battery
The battery connector is protected against a reverse
polarity connection by two slanted edges, see illustra-
tion. When correctly plugged in, the
unconnected pin of the connector
is at the bottom, as shown in the
illustration. The plus pole (red lead)
is in the middle and the minus pole
(brown or black lead) is toward the
antenna side.
Never try to force the connector
onto its circuit-board socket.
Place the battery into its compartment and close the
transmitter's cover.
Battery operation timer at the bottom left of the screen
This timer shows the transmitter's cumulative operating
time since the transmitter's battery was last charged.
This timer is automatically reset to "0:00" when the
transmitter is switched on and its battery voltage is
significantly higher than when the transmitter was last
used, e.g. because the battery was charged.
#01 0:00h
Stop watch
Flight tim
K78
0:00.0
4.1V
0:00.0
00
0
0
0:00h
M
V
Transmitter
connector polarity
Battery connector

20 General operating notices
Lithium battery CR 2032
On the side of the transmitter board opposite the
transmitter battery there is a fixture containing a
lithium battery, type CR 2032, which can be replaced
by the user.
This battery maintains the date and time
settings during a transmitter power supply
outage, for example when the transmitter's
main battery is being replaced.
General charging instructions
• Follow the charging instructions of the
charger manufacturer and battery manu-
facturer.
• Do not exceed the maximum permissible
charging current of the battery manufac-
turer. To prevent damage to the transmit-
ter, the transmitter charging current should gener-
ally not exceed 1.5 A. Limit the charge current if
necessary.
If the transmitter battery is charged with more
than 1.5 A, it must be charged outside of the
transmitter. Otherwise, the printed circuit board
may be damaged from overloading the printed
connectors and/or overheating the battery.
• Perform a few test charges to make sure that the
automatic cutoff of automatic chargers works.
This is especially true when you want to use an
automatic charger to charge the NiMH battery
which comes standard in the mz-18 HoTT trans-
mitter, or the lithium battery which comes stand-
ard in the mz-24 HoTT transmitter. Monitor the
cutoff behaviour if the charger that you are using
has this option.
• Do not discharge the battery or run battery care
programs using the charging socket. The charg-
ing socket is only for charging.
• Always first connect the charging cable to the
charger, and then connect it to the receiver or
transmitter battery. This prevents unintentional
short-circuiting with the bare ends of the charging
cable plug.
• If the battery becomes hot, check the battery and
exchange it or reduce the charging current.
• Do not charge the batteries without
monitoring them.
• Follow the safety instructions and han-
dling guidelines starting page
Stick length adjustment
The length of both sticks can be continuously ad-
justed to adapt these transmitter controls to the pilot's
preference.
Hold the lower half of the knurled grip in place then
turn the upper section to release its counter-locked
threads.
Now pull up or push down on the stick's end to the
desired length. When the length is suitable, tighten
the counter-locked threads of the upper and lower
sections again.
Lithium battery
Other manuals for mc-32 HoTT
2
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