GRAUPNER 16006000 User Manual

1. Notes......................................................................................................................19

2. Functions...............................................................................................................21

2.1. Binding.........................................................................................................21

2.1.1 Binding multiple receivers...................................................................................21

2.2. Fail-Safe function...............................................................................................21

2.3 Range-checking...........................................................................................22

3. Receiver..................................................................................................................23

3.1. Connections..................................................................................................24

3.2. Receiver set-up menu........................................................................................25

3.3. Free mixers.......................................................................................................25

3.4 Assigning the gyro axes......................................................................................27

4. Programming the gyro settings...............................................................................29

4.1. Programming PID correction..............................................................................29

4.2. Programming the factors....................................................................................30

4.2.1 Programming, transmitter with proportional controls............................................30

4.2.2 Programming, transmitter without proportional controls.......................................31

4.3 Initialising the gyro............................................................................................31

5. Conformity declaration / Guarantee / Manufacturer’s declaration / Disposal..50

MANY THANKS

for deciding to purchase the Graupner/SJ HoTT 2.4 system. Please read right through these
operating instructions before you attempt to install and operate the Graupner HoTT 2.4 system.

• The receiver stabilises the model aircraft in difficult, windy conditions, acting on a maximum of
three axes

• Proportional gyro suppression for natural flying characteristics

• Excellent stabilisation for smooth, accurate manoeuvres

• The triple-axis gyro endows even very demanding aerobatic models with docile flying characteristics,
and greatly simplifies aerobatics

• Aerobatic manoeuvres can be flown much more accurately

• Simple gyro assignment procedure

• Facility to adjust parameters using HoTT telemetry

• Altitude sensor for vario and altimeter function (Order No. 33577)

1. APPROVED USAGE

The receiver is intended exclusively for use in radio-controlled models. Any other usage is prohibited,
and may result in damage to the receiver or model, and serious personal injury. We grant no
guarantee and accept no liability for any type of use outside the stipulated range.
Not suitable for children under fourteen years. This receiver is not a toy!

The receiver is also equipped with a telemetry function which is only available in combination with a
Graupner/SJ HoTT 2.4 system. If you do not own a Graupner/SJ HoTT 2.4 system, the receiver will
not work.
Please start by reading through the whole instructions before you attempt to install and operate the
receiver.
These operating instructions are an integral part of the product. They contain important notes on
operating and handling the receiver. For this reason please store the operating instructions in a safe
place, and pass them on to the new owner if you ever dispose of the product. Failure to observe the
operating instructions and safety notes invalidates the guarantee.
Here at Graupner we are constantly working on the further development of all our products; for this
reason we are obliged to reserve the right to introduce changes to the set contents in form,
technology and features.
Please understand that we will not countenance claims resulting from information and illustrations in
these operating instructions.

Please store the operating instructions in a safe place for future reference!

1.1 SAFETY NOTES
KEY TO THE SYMBOLS

1.2 GENERAL NOTES

• The receiver’s integral gyros are very fast, high-resolution components. This means that you
should always use high-speed digital servos wherever possible, so that the gyro’s corrective

signals are converted directly and accurately into servo movement; this helps to prevent the
model oscillating.

• Keep all servo extension leads as short as possible.

• When switching on or adjusting the radio control system, it is essential to keep the transmitter

aerial at least 15 cm from the receiver aerial(s). If the transmitter aerial is too close to the receiver
aerials, the receiver will be swamped and the red LED on the receiver will light up. The transmitter
responds with a flashing red LED and repeated beeps at approximately one-second intervals, i.e.
the radio control system reverts to fail-safe mode. If this should happen, increase the distance
until the audible warning ceases, and the blue transmitter LED lights up constantly once more.
The red LED on the receiver should now be off.

2. FUNCTIONS

2.1. Binding

The Graupner/SJ HoTT 2.4 receiver must be “bound” to “its” Graupner/SJ HoTT 2.4 RF module
(transmitter) before a radio link can be created between them; this process is known as “binding”.
Binding is only necessary once for each combination of receiver / RF module, so the binding
procedure described below only needs to be repeated if you add more receivers. However, binding
can be repeated at any time if you wish; for example, if you switch transmitters. This is the procedure
in detail:

• Binding is only possible if the receiver has not been linked with a bound transmitter since being
switched on (red LED lights); press the SET button to set the receiver to BIND mode.

• If you have already bound a receiver to the transmitter, and wish to bind the receiver to a new
model memory, this is the procedure:

• Switch the transmitter’s RF section off in the “Basic model settings” menu.

• Switch the receiver on, and press the SET button to set it to Bind mode.

• Initiate binding in the transmitter’s “Basic model settings” menu.

• The red receiver LED should go out within about ten seconds. If it does, the binding process has

been completed successfully.

• Your transmitter / receiver combination is now ready for use.

• However, if the red LE D continues to glow, then the binding process has failed. If this should

happen, repeat the whole procedure.

2.1.1. Binding multiple receivers per model

If necessary it is also possible to bind more than one receiver to a particular model. First bind each
receiver individually as described earlier.
When the system is actually in use, the receiver which was last bound acts as the Master unit, and
any telemetry sensors installed in the model must be connected to this receiver, as only the Master
receiver transmits the data to the ground using the downlink channel. The second - and any other –
receivers operate in Slave mode, in parallel with the Master receiver, with the downlink channel
switched off. The channel mapping function of HoTT telemetry also allows the control functions to be
divided up amongst multiple receivers, or alternatively the same control function to be assigned to
multiple receiver outputs. For example, this is useful if you wish to actuate each aileron with two
servos instead of just one.

2.2. Fail-Safe function

In the receiver’s default state, all connected servos remain in their last valid position (“Hold” mode)
if a fail-safe situation should arise. In fail-safe mode the red LED on the receiver lights up, and the
transmitter generates an audible alert by beeping at a rate of around one per second.
You can exploit the safety potential of this option by at least setting the throttle position (for
internalcombustion powered models) to Idle, or the motor function (electric-powered models) to “Stop”,

or “Hold” for a model helicopter, if a fail-safe event should occur. These settings ensure that the model
is less likely to fly out of control if interference should occur, thereby helping to avoid property damage
or even personal injury.

Read the operating instructions supplied with your radio control system for more details.
The gyro system remains active in a fail-safe situation.

2.3 Range-checking

The range of your Graupner/SJ HoTT 2.4 system can be checked as described in the following
instructions. We recommend that you ask a friend to help you with the procedure.
Ideally the receiver should already be bound to the transmitter. Install it in the model in its final
position.

• Switch the radio control system on, and wait until the red LED on the receiver goes out. The servo
movements can now be observed.

• Place the model on a flat surface (pavement, close-mown grass, earth), and ensure that the
receiver aerials are at least 15 cm above the ground. It may be necessary to pack up the model

to achieve this for the period of the range-check.

• Hold the transmitter away from your body at hip-level. Don’t point the transmitter aerial straight at
the model; instead rotate or angle the aerial tip in such a way that it is vertical when you operate

the transmitter controls.

• Select range-check mode, as described in the transmitter instructions.

• Walk away from the model, moving the transmitter sticks. If you detect an interruption in the radio

link at any time within a distance of about 50 m, see if you can reproduce the problem.

• If your model is fitted with a motor or engine, switch it on or start it, so that you can check effective
range when potential interference is present.

• Walk further away from the model to the point where full control is no longer possible.

• At this point you should manually switch off range-check mode.

The model should now respond to the controls again. If this is not 100% the case, do not use the
system. Contact the Graupner/SJ Service Centre in your locality and ask their advice.
We recommend that you carry out a range-check before every flight, simulating all the servo
movements which occur in flight. To guarantee reliable model operation, radio range must always be
at least 50 m on the ground.

2.4 INSTALLATION IN THE MODEL

The gyro-receiver must be installed “square” relative to the model, i.e. at right-angles to the aircraft’s
longitudinal axis, otherwise the gyros will be unable to function as intended (Order No. 33577 must
also be horizontal relative to the fuselage centreline to allow the accelerometer to work correctly).

3. RECEIVER

3.1 Connections

Connect the servos to the row of sockets on one end of the receiver. The connectors are polarised:
note the small chamfers on one side. Never use force - the connectors should engage easily. The
polarity is also printed on the receiver; the negative wire (-) is brown, the positive (+) red and the
signal orange. The servo sockets of Graupner/SJ HoTT 2.4 receivers are numbered sequentially.
The socket for channel 6 can also be programmed to deliver a (digital) sum signal (see section 3.2:
Receiver set-up).

I²C (Inter-Integrated Circuit) - socket currently not active; for servicing purposes only!
Power supply

The receiver does not feature specific sockets for connecting the battery. We recommend that you
connect the power supply to the socket(s) close to the servos already connected to the receiver. If you
wish to connect multiple separate batteries, the batteries must be of the same nominal voltage and
capacity. Never connect batteries of different type, or packs of greatly differing states of charge, as
this can cause effects similar to a short-circuit. If you encounter this problem, we recommend the use
of a voltage stabiliser unit (e.g. PRX-5A receiver power supply, Order No. 4136) between the batteries
and the receiver .

Telemetry

The optional telemetry sensors are connected to the socket marked “T” (Telemetry). Alternatively the
receiver can monitor a voltage up to max. 25.5 V DC via this socket.

NOTE: you can either connect this socket to a servo or a telemetry sensor or the battery to be
monitored; the receiver must be set up accordingly. Please see the following section for further details.