# GETTING STARTED

Thank you for purchasing the Graupner HoTT 2.4 System Please read through this entire manual before you attempt the installation and usage of your Graupner HoTT 2.4 System!

These operating instructions are part of this product. They contains important notes to the operation and handling. Please take this into consideration when you pass on the product to third parties. Neglect of the operating instructions and the safety instructions lead to expiring the warranty.Graupner constantly work on the advancement of all remote control systems; changes of the scope of delivery in form, technology and equipment we must reserve ourselves therefore. Please have understanding for the fact that from data and illustrations of this operating instructions no requirements can be derived. Please keep these instructions for further reference!

1. GENERAL NOTE When switching on or adjusting the radio control system it is essential to keep the transmitter aerial at least 15 cm away from the receiver aerials at all times. If the transmitter aerial is too close to the receiver aerials, the receiver will be overloaded, causing the red LED on the receiver to light up. The transmitter responds by emitting a beep once every second; the red LED also goes out. The radio control system
is now in Fail-Safe mode. If this should occur, simply increase the distance between the aerials until the audible warning signal ceases, and the red LED on the transmitter lights up again; at the same time the red LED on the receiver should go out.

2. FUNCTIONS

2.1. Binding When you wish to use the Graupner HoTT 2.4 GHz receiver with a particular transmitter, the fi rst step must always be to “bind” the unit to “its” Graupner HoTT 2.4 GHz RF module (transmitter). This “binding” procedure only needs to be carried out once for each combination of receiver and RF module. The units supplied in the set are already bound to each other at the factory, i.e. the binding procedure described in the following section only needs to be carried out when you wish to use an additional receiver. However, it can also be repeated at any time if required, e.g. after changing transmitters. When binding is required, this is the procedure:
• Switch the transmitter and receiver on. • Locate the BIND / RANGE button on the back of the transmitter, and hold it pressed in while you press and hold the SET button on the receiver. Both LEDs on the back of the transmitter now glow constantly, and the red LED on the receiver fl ashes.

• Under normal circumstances the fl ashing red LED on the receiver will cease to fl ash and switch to a constant green within about ten seconds. This indicates that the binding process is complete. You can now release both buttons, and your transmitter / receiver combination is ready for use. • However, if the red LED on the receiver continues to fl ash for longer than ten seconds, then the binding process has failed. If this should occur, repeat the whole procedure.

2.1.1.Binding“ multiple receivers in one model If required, it is also possible to bind multiple receivers to the transmitter for a particular model. The fi rst step is to bind each receiver individually using the procedure already described.When the system is in use, the receiver which was bound last is the Master receiver. Any telemetry sensors installed in the model must be connected to this unit, as only the Master receiver transmits sensor data using the downlink channel. The second and all further receivers operate in parallel with the Master receiver but in Slave mode, with the downlink channel switched off. The control functions can also be distributed amongst multiple receivers; this is carried out using theChannel Mapping function of the SMART-BOX (Order No. 33700). In the same way it is possible to assign one control function to multiple receiver outputs; a typical example would be the use of two servos for each aileron instead of only one, etc.

Getting Started Graupner HoTT 2.4 

### 012.2. Range checking The method of checking the effective range of the Graupner HoTT 2.4 GHz system is described below. We recommend that you ask a friend to help you with this procedure. After binding the receiver to your transmitter, switch the transmitter and the receiver on, and wait until the green LED on the receiver lights up.

• Install the bound receiver in the model in its fi nal intended position. • Switch the RC system on, so that you can observe the movement of the servos. • Set up the model on a fl at surface (pavement, closely mown grass or earth), and ensure that the

receiver aerials are located at least fi fteen cm above the ground. This may require a support for the

model. • Hold the transmitter at hip-height, away from your body, but do not point the aerial directly at the model; instead turn and / or angle the aerial tip so that it stands vertical, and keep it there for the duration of the range check. • Locate the BIND / RANGE button on the back of the transmitter, and press it to initiate range-check mode. Hold the button pressed in until the transmitter starts to beep at a regular rhythm; the red and green LEDs adjacent to the BIND / RANGE button now fl ash alternately. • Walk away from the model, operating the transmitter sticks constantly. If you detect an interruption in the link within a range of about fi fty metres, stand still and attempt to reproduce it.

• If the model is fi tted with a motor, switch it on in order to check whether the power system is gene- rating interference. • Continue to walk away from the model until you reach the point where perfect control is no longer possible. • Now press the BIND / RANGE button on the transmitter once more; this terminates range-check mode manually, and the model should respond normally to control commands. If this does not occur with 100% reliability, the system should not be used. Contact your local Service Department of Graupner GmbH & Co. KG. • Range-check mode is usually terminated manually when the user presses the BIND / RANGE but ton, but it terminates automatically after about ninety seconds in any case. The red LED now glows constantly again, while the green LED either glows constantly or fl ashes continuously, according to the Country setting. • We recommend that you check effective radio range before every fl ight. While you are carrying out the check, simulate all the servo movements which will take place when the model is in fl ight. The ground range must always be at least fi fty metres in order to ensure safe, reliable model con-

trol.

Note: Range-check mode is usually terminated manually when the user presses the BIND / RANGE button, but it terminates automatically after about ninety seconds in any case.
CAUTION: During normal operations (i. e. when controlling a model) never press and hold the programming

button on the transmitter module!

2.3. Fail-Safe function In its default state (as delivered) the receiver is set to “Hold” mode, i.e. if a fail-safe situation occurs, all the servos connected to it maintain the last position detected as valid. In this mode the red LED on thereceiver lights up when interference occurs, and the red LED on the transmitter goes out. The transmitter also starts beeping about once per second as an audible warning. You can exploit the safety potential of the fail-safe option by at least programming the throttle channel to respond to a fail-safe situation: the throttle channel of an engine-powered model should be set to idle, the throttle channel of an electric-powered model to “stop”, and the throttle channel of a model helicopter to “Hold”. If interference should occur, these settings will help prevent the model fl ying out of control, possibly causing personal injury or property damage.

IMPORTANT: The two functions “Binding” and “Range check” described above can be used regardless of the method you last employed to program the transmitter, i.e. using the programming button or the SMART-BOX; neither of these two options causes signi fi cant changes to the settings saved in the receiver. However,



### 02 Getting Started Graupner HoTT 2.4if you call up the Fail-Safe function using the programming button as described below, this resets ALL the settings of the SMART-BOX at the Fail-Safe screen (RX FAIL SAFE) - and this includes the settings available through the facilities of the programming button. At the same time the Country setting will revert to Universal if you have previously selected “France” using the programming button - see belowunder “2.4”. You MUST therefore select the Country setting again if necessary. For this reason, wherever possible it is always best to maintain your programmed settings using the SMART-BOX.

Switch your receiving system on. Locate the BIND / RANGE button on the back of the transmitter, and hold it pressed in while you switch the transmitter on. Release the button again once it is switched on. You can now call up the desired Fail-Safe mode (Fail-Safe on / off, Hold, or Standard) by cycling through the modes with a brief press of the BIND / RANGE button:

• Fail-Safe mode: when you press the BIND / RANGE button, the transmitter beeps once; the red and green LEDs glow constantly. It is now possible to program positions to which the servos will move in a Fail-Safe situation; this occurs after a “Hold” period of 0.75 seconds: move the corresponding transmitter controls (sticks, rotary knobs, INC / DEC buttons etc.) to the desired Fail-Safe positions SIMULTANEOUSLY, then hold the BIND / RANGE button pressed in for three to four seconds. When you release the button, both the red and green LEDs should light up constantly, and the transmitter should not emit an au- dible signal: the transmitter now reverts to Control mode. If this does not occur, repeat the procedu-

re. • Hold mode (recommended for model helicopters): when you press the BIND / RANGE button, the transmitter beeps twice; the red LED lights up constantly, and the green LED goes out (factory default setting). If interference occurs, all servos programmed to “Hold” remain at the last position detected by the receiver as correct; this situation is maintained until such time as the receiver picks up a new, valid control signal. You can save your selection by holding the BIND / RANGE button pressed in for three to four se- conds. When you release the button, both the red and green LEDs should light up constantly, and the transmitter should not emit an audible signal: the transmitter now reverts to Control mode. If this does not occur, repeat the procedure.
• Fail-Safe OFF: when you press the BIND / RANGE button, the transmitter beeps three times; the green LED glows constantly, the red LED goes out. You can save your selection by holding the BIND / RANGE button pressed in for three to four se- conds. When you release the button, both the red and green LEDs should light up constantly, and the transmitter should not emit an audible signal: the transmitter now reverts to Control mode. If this does not occur, repeat the procedure. • Standard mode (suitable for fi xed-wing model aircraft only): when you press the BIND / RAN- GE button, the transmitter beeps four times; both LEDs are off. In this mode the throttle servo (channel 1) moves to the Fail-Safe position, i.e. the position you have programmed for a Fail-Safe situation, while all the other channels remain at “Hold”. Move the throttle stick to the desired position, then hold the BIND / RANGE button pressed in for three to four seconds. When you release the button, both the red and green LEDs should light up constantly, and the transmitter should not emit an audible signal: the transmitter now reverts to Control mode. If this does not occur, repeat the procedure.

2.4. Range warning If the receiver signal in the down-link channel becomes too weak, the transmitter always generates an audible range warning in the form of a beep emitted about once per second. Since the transmitter’s output is much higher than that of the receiver, you will still maintain full control of the model, but in the interests of safety you should fl y the model back towards you until the warning signal ceases again. If the audible range warning signal does not cease when you reduce the distance, then the transmitter or receiver low voltage or temperature warning is active! In this case you must land the model and cease operations without delay.

2.5. Firmware update or SMART-BOX connection

The SMART-BOX is connected to the DATA socket on the back of the transmitter.

Getting Started Graupner HoTT 2.4 

### 03Firmware updates for the transmitter RF module can be transferred via the DATA or telemetry interface in conjunction with a PC running Windows XP, Vista or 7. For this you also require the USB interface, Order No. 7168.6, and the adapter lead, Order No. 7168.6A, which are available separately. The programs and fi les required for this are available from www.graupner.de in the Download area for the corresponding products. See also chapter 4.1.



### 04 Getting Started Graupner HoTT 2.4 3. Receiver

3.1 Connections Plug the servos into the row of sockets on the right-hand end of the receiver. The connector system is polarised; note the small chamfer on one edge. Never use force - the plugs should engage easily and fully. The socket polarity is also marked on the case: brown wire (-), red (+) and orange (signal). The servo sockets of the Graupner-HoTT 2.4 receiver are numbered. The socket marked “- +/B” is intended for the battery. If necessary, a servo can be connected to this socket in parallel with the power supply; a Y-lead (Order No. 3936.11) is required for this.

It is also possible to program the channel 8 for the sum signal using a Graupner HoTT transmitter or the SMART-BOX (Order No. 33700). This is important for certain optional devices which require this signal.

Power supply for receiver 33508, 33512 When using High Power servos, connect the receiver power supply/s preferably to the vertical ports of the receiver. If necessary, the servos can be connected to this sockets in parallel with the power supply; a Y-lead (Order No. 3936.11) is required for this. The lower sockets (33508 and 33512) should not be used, because an increased voltage drop occurs. When using a dual power supply, use the sockets on the outside: Receiver 33506/33508 (GR-12/GR-16): Channel 1 and 6 (or 2 and 5) Receiver 33512 (GR-24): Channel 11 and 12

The socket marked “T” - telemetry interface - on the left-hand end of the receiver is intended for the optional telemetry sensors. This socket is also used for loading fi rmware updates in conjunction with the USB interface. This socket is also polarised; note the small chamfer on one edge. Never use force - the plugs should engage easily and fully. The socket polarity is also marked on the case: brown wire (-), red (+) and orange (T). Servo sockets

Programming socket

RECEIVER 33508

Channel 1 and 6

do not useGetting Started Graupner HoTT 2.4 

### 05 3.2. Low voltage warning If the receiver voltage falls below 3.8 V, the transmitter’s RF module generates a low voltage warning in the form of a “general alarm sound”: a steady beeping at intervals of about one second.

Note: The warning threshold can be programmed in the TELEMETRY menu of the transmitter (or with the SMART-BOX). Please read the manual of your transmitter.

3.3. Temperature warning If the receiver temperature falls below -10° C or exceeds +70° C, the transmitter’s RF module generates a temperature warning in the form of a “general alarm sound”: a steady beeping at intervals of about

one second.

Note: The warning threshold can be programmed in the TELEMETRY menu of the transmitter (or with the SMART-BOX). Please read the manual of your transmitter.

3.4. Firmware updates Firmware updates for the receiver can be transferred via the programming socketvia the programming socket on the side of the unit, in conjunction with a PC running Windows XP, Vista or 7. For this you also require the USB interface, Order No. 7168.6, and the adapter lead, Order No. 7168.6A, which are available separately. The programs and fi les required for this are available from www.graupner.de in the Download area for the corresponding products. See also chapter 4.2.4. Firmware update Graupner-HoTT 2.4 Transmitter and receiver

Firmware updates for the transmitter RF module can be transferred via the DATA or telemetry interface in conjunction with a PC running Windows XP, Vista or 7. For this you also require the USB interface, Order No. 7168.6, and the adapter lead, Order No. 7168.6A or 7168.6S, which are available separately. The programs and fi les required for this are available from www.graupner.de in the Download area for the corresponding products. Install the Firmware Update Utility Graupner and the USB drivers on your computer. Check the system requirements!

This socket is polarised; note the small chamfer on one edge. Never use force - the plug should engage easily and fully.

4.1. Receiver Connect the adapter lead to the socket on the left-hand end of the receiver, as shown in the illustration. This socket is also polarised; note the small chamfer on one edge. Never use force - the plug should engage easily and fully. The black wire (-) must be at the front, the white wire (T) at the back.

4.2. Update procedure Ensure that the adapter lead is con fi gured as shown in the illustrations, and is connected correctly to

the transmitter or receiver.

Start the Firmware Upgrade Graupner Studio. Under „Port Select“ select the correct COM port „Silicon Labs CP210x USB to UART Bridge“, i.e. the one to which
the USB lead is connected. Choose the „HoTT receiver update“

menu. Now click on the “File Browse” button and select the the previously

loaded fi rmware fi le ending in *.bin. If everything is correct, the file will appear in the corresponding window.

The fi rmware fi les are encoded in product-speci fi c form, i.e. if you accidentally select a fi le which does not match the product (e.g. transmitter update fi le instead of receiver file), then the pop-up window “Product code error” will appear, and you will not be able to start the update procedure ( fi g. A).



### 06 Getting Started Graupner HoTT 2.4Press the “Program” button in the software. Wait brie fl y until you see movement in the progress bar. This make take up to

fi ve seconds, depending on the computer ( fi g. B).

Receiver : press the SET button, and switch the receiver on while you hold it pressed in.

After a few seconds the Status screen displays the message “Found target device...”; you can now release the button, and

the fi rmware update process commences.

If the device is not recognised, if the pop-up window “Target device ID not found” appears, or if the process fails before 100% is reached, you must restart the update procedure. Repeat all the steps as described above.

The Status display and the Progress bar show the progress of

the fi rmware update. The update is completed when the popup message “Download Process Complete” appears ( fi g. C).

During the update process both red and green LEDs on the receiver glow constantly. When it is complete, the red LED starts

fl ashing, the green goes out.

Switch your receiver off, and disconnect the adapter lead.

Caution: after completing an update process, you must initialise the device before using it, i.e. reset it to the factory

default values.

Initialisation: Press and hold the SET button on the receiver and switch it on, the red and green LED‘s are blinking. After about three seconds the LED‘s expires, then only the red LED fl ashes. Release now the SET button, the initialization is complete.

Please note: The initialisation procedure erases ALL the settings you have entered. Where necessary, you will need to program your preferred settings again.

Any settings you have entered using the SMART-BOX are also lost when you initialise the receiver. If you carry out a receiver fi rmware update, you will need to re-enter these settings.

The latest version of these instructions can be found at www.graupner.de

Getting Started Graupner HoTT 2.4 

### 07 

## A

C B

### Konformitätserklärung gemäß dem Gesetz über Funkanlagen und **Telekomunikationsendeinrichtungen (FTEG) und der Richtlinie 1999/5/EG (R&TTE)**
Declaration of Conformity in accordiance with the Radio and Telecomunikations Terminal Equipment Act (FTEG) and Directive 1999/5/EG (R&TTE)

Graupner GmbH & Co. KG

Henriettenstraße 94-96

D-73230 Kirchheim/Teck

erklärt, dass das Produkt:

declares that the product

Geräteklasse: **2**
Equipment class

den grundlegenden Anforderungen des § 3 und den übrigen einschlägigen Bestimmungen des FTEG (Artikel 3 der R&TTE) entspricht.
complies with the essential requirements of § 3 and the other relevant provisions of the FTEG (Article 3 of the
R&TTE Directive).

Angewendete harmonisierte Normen:

Harmonised standards applied

**EN 60950:2006**

**EN 301 489-1 V1.7.1**

**EN 301 489-3 V1.4.1**

**EN 300 328 V1.7.1** Health and safety requirements pursuant to § 3 (1) 1. (Article 3 (1) a))

Protection requirement concernig electromagnetic compatibility § 3 (1) 2, Artikel 3 (1) b))

Measures for the efficient use of the radio frequency spectrum § 3 (2) (Article 3 (2))

Kirchheim, 19. Dezember 2011 Stefan Graupner, Geschäftsführer
Stefan Graupner, Managing Director

**Graupner GmbH & Co. KG Henriettenstraße 94-96 D-73230 Kirchheim/Teck Germany**

**Tel: 07021/722-0 EMail: info@graupner.de**  **Fax: 07021/722-188** Gesundheit und Sicherheit gemäß § 3 (1) 1. (Artikel 3 (1)a))

Schutzanforderungen in Bezug auf elektromagnetische Verträglichkeit § 3 (1) 2, Artikel 3 (1) b))

Maßnahmen zur effizienten Nutzung des Frequenzspektrums § 3 (2) (Artikel 3 (2)) **mx-12 HoTT - No. 33112, mx-16 HoTT - No. 33116, mx-20 HoTT - No. 33124,**  **GR-12 HoTT - No. 33506, GR-16 HoTT - No. 33508,**
**GR-24 HoTT - No. 33512**



# 0678

08 Getting Started Graupner HoTT 2.4Getting Started Graupner HoTT 2.4 

### 09 ENVIRONNEMENTAL PROTECTION NOTES

When this product comes to the end of its useful life, you must not dispose of it in the ordinarydomestic waste. The correct method of disposal is to take it to your local collection point for recycling electrical and electronic equipment. The symbol shown here, which may be found on the product itself, in the operating instructions or on the packaging, indicates that this is the case.

Individual markings indicate which materials can be recycled and re-used. You can make an important contribution to the protection of our common environment by re-using the product, recycling the basic materials or recycling redundant equipment in other ways.

Remove batteries from your device and dispose of them at your local collection point for batteries.

In case of R/C models, you have to remove electronic parts like servos, receiver, or speed controller from the product in question, and these parts must be disposed of with a corresponding collection point for electrical scrap.If you don’t know the location of your nearest disposal centre, please enquire at your local council offi ce. 

### FCC INFORMATION

Graupner GR-16 HoTT #33508 and GR-24 #33512

FCC ID: ZKZ-33508 and ZKZ-33512

FCC Label Compliance Statement This device complies with Part 15C of the FCC Rules. Operation is subject to the following two conditions: 1. This device may not cause harmful interference. 2. This device must accept any interference received, including interference that may cause undesired operation.

WARNING: Changes or modi fi cations not expressly approved by the party responsible for compliance could void the user‘s authority to operate the equipment.

NOTEThis equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15C of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful

interference to radio communications.However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from that to which the receiver is connec-

ted. • Consult the dealer or an experienced radio/TV technician for help.

RF Exposure Statement This device has been evaluated to meet the FCC RF exposure requirement when used in combination with the genuine Graupner HoTT accessoires and operated with a minimum distance of 20 cm between the antenna and your body.

### 10 Getting Started Graupner HoTT 2.4 

### ACCESSORIES:

Order No. 33505 Receiver GR-12S HoTT

Order No. 33506 Receiver GR-12 HoTT

Order No. 33508 Receiver GR-16 HoTT

Order No. 33512 Receiver GR-24 HoTT

Order No. 33600 Graupner HoTT GPS/Vario

Module

### ACCESSORIES:

Getting Started Graupner HoTT 2.4 

### 11 Order No. 33611 General Air-Module Graupner HoTT Vario, RPM, Fuel, 2x temperature, 2x voltage, max. current 40A, capacity, single cell voltage 2 -6 S

Order No. 33615 Order No. 33613 Graupner HoTT Temperature Sensor 200°C, voltage sensor

Graupner HoTT RPM Optical Sensor

Order No. 33700 HoTT SMART BOX Order No. 33612 Graupner HoTT Temperature Sensor 120°C, voltage sensorGraupner GmbH & Co. KG

Henriettenstraße 94 – 96
D-73230 Kirchheim/Teck Germany www.graupner.de

Änderungen sowie Liefermöglichkeiten vorbehalten. Lieferung durch den Fachhandel. Bezugsquellen
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HoTT 1.0 / November 2012 - EN V1.5