JETI model DUPLEX TU2 Transmitter Modules Instruction Manual

JETI model DUPLEX TU2 Transmitter Modules

Overview

DUPLEx Tx transmitter modules, along with DUPLEx Rx receivers, constitute the base of a complex system working in the 2.4GHz band, assigned to remote control of models. These modules may be installed into transmitters which conveniently transmit stick and control element positions. Recently most of the available transmitters working with PPM mode are suitable for this purpose.

Specifications

Specification| DUPLEx TU2| DUPLEx TF| DUPLEx TG2/TGi/TGi2/TGs| DUPLEx TMe| DUPLEx TMp
---|---|---|---|---|---
Dimensions [mm]| 55x26x11| 59x37x20| 60x44x21| 64x28x11| 43x22x16
Weight| 15 g| 40 g| 50 g| 17 g| 20 g
Antenna| 2 dBi| 2 dBi| 2 dBi| 2 dBi| 2 dBi
Acoustic signalling of conditions| —
Number of input PPM channels| 16| 16| 16| 16| 16
Operation temperature| -10 to +85°C| -10 to +85°C| -10 to +85°C| -10 to +85°C| -10 to +85°C
Supply voltage| 3.5 – 16V| 3.5 – 16V| 3.5 – 16V| 3.5 – 16V| 3.5 – 16V
Average current| 38 mA| 38 mA| 38 mA| 38 mA| 38 mA
Output power| 20 dBm| 20 dBm| 20 dBm| 20 dBm| 20 dBm

FAQ

• What is the operating frequency of DUPLEx transmitter modules?
• The operating frequency is the 2.4GHz band.
• Are DUPLEx transmitter modules compatible with PPM mode transmitters?
• Yes, most of the available transmitters working with PPM mode are suitable for these modules.
• Can the transmitter and receiver modules be paired with multiple receivers?
• A transmitter module can be paired with multiple receivers, but each receiver can only be paired with one transmitter module.
• What is the range of the transmitter module in test mode?
• In test mode, a correctly working transmitter and receiver should have a range of at least 50 meters.
• What does the acoustic signalling indicate?
• Acoustic signals from the transmitter modules can indicate various conditions such as loss of range, low receiver voltage, or other telemetric alerts.
• Is there a warranty for the DUPLEx transmitter modules?
• Yes, there is a warranty of 24 months from the day of purchase, assuming the modules have been operated in conformity with the instructions at recommended voltages and were not damaged mechanically.

Additional Information

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INTRODUCTIONS

• DUPLEX Tx transmitter modules (along with DUPLEX Rx receceivers) constitute the base of a complex system working in the 2.4GHz band, assigned to remote control of models. These modules may be installed into transmitters which in a convenient way transmit stick and control element positions. Recently most of available transmitters working with PPM mode are suitable for this purpose.
• DUPLEX Tx modules work up data of the transmitter control elements and send them to the corresponding (paired) receiver. Simultaneously they exchange service and telemetric informations with the receiver and take in turn advantage of them for operation optimization.
• In order to take full advantage of the DUPLEX system it is advisable to connect the universal terminal JETIBOX to the transmitter module. This way you will be able to adjust easily requested parameters and to display data of transmitter, receiver as well as data of connected telemetric or diagnostic equipment. Another item of the TX- modules is indication of the complete system condition by means of sound signals.
• Transmitter modules of the DUPLEX system are offered in form of exchangeable plug-in modules DUPLEX TF, DUPLEX TG as well as modules DUPLEX TU2 for internal assembl.

Installation of DUPLEX TF and DUPLEX TG Modules
DUPLEX TF and TG modules are assigned to transmitters with exchangeable HF plug-in modules. TF modules are compatible to corresponding exchangeable modules of Futaba and Hitec transmitters. TG modules are assigned to Graupner and JR transmitters. Factual assignments see Table 2 at the end of the instructions. Remove the original HF module of your transmitter and plug-in with the correct orientation of the connector the DUPLEX TF or TG in place of the original module. Screw the Tx-antenna delivered with the Tx module into the module

Installation of the DUPLEX TU Module

DUPLEX TF and TG modules are assigned to transmitters with exchangeable HF plug-in modules. TF modules are compatible to corresponding exchangeable modules of Futaba and Hitec transmitters. TG modules are assigned to Graupner and JR transmitters. Factual assignments see Table 2 at the end of the instructions. Remove the original HF module of your transmitter and plug-in with the correct orientation of the connector the DUPLEX TF or TG in place of the original module. Screw the Tx-antenna delivered with the Tx module into the module box. Place of destination of the DUPLEX TU2 transmitter modules are transmitters working in PPM mode, but without having exchangeable HF module. In this case connection of the module to the transmitter affords certain skill and experience with electronic equipment. The skill necessary depends upon the type of transmitter and upon the manner you intend to connect it up. On PPM transmitters with a „trainer” connector the transmitter module can be connected to this connector. Other transmitters reauire removal of the Tx back cover in order to assemble the module DUPLEX TU2 directly.inside the transmitter. For this kind of work we recommend to take advantage of the help of a service station. An acute list of appropriate centers you may find on the home page of www.jetimodel.com.

Installation with the Aid of the Trainer Connector
Find the connections of the trainer connector in the instruction manual of your transmitter, connections of several transmitters are shown below. In order to insure correct operation of the DUPLEX TU2 module jou have to interconnect the corresponding pins GND, supply +Ubat and the PPM signal between the transmitter and the IN connector of the module. Mechanically you may fix the module and the connector either to the transmitter case or the transmitter tray.

Internal Installation
Switch off the transmitter and place it on a soft pad in order to prevent mechanical damage. Remove the cover and before proceeding remove batteries. Select an appropriate location in your transmitter for assembly, keeping placement of the antenna connector in mind. Mechanical fixing of the module you may acomplish by means of double sided tape, Velcro fastener or by small screws through holes provided in the module. For installation of the antenna connector you may usually take advantage of one of the holes provided for additional switches, the hole for the existing antenna 35/40 MHz, or you may drill a 6,5 mm dia. hole at an appropriate location. In any case, the part of the connector protruding through the transmitter wall should be long enough (after screwing the antenna in there must remain at least a small gap between transmitter case and antenna.

On the DUPLEX TU2 module there is a 4-pin connector which connects the voltage supply and the PPM signal of the transmitter encoder to the module (see Fig.).

Installation of theTU2 module

1. Installation of one transmitter module Duplex 2,4GHZ. As far as transmitters of the Graupner MC line are concerned disconnect and remove the FM module and connect the TU2 module directly to the transmitter encoder by means of the original cable. Some Graupner MC transmitters as well as other transmitter types are not equipped with standard connectors. In that case you will have to apply the cable which is contained in Duplex TU2 package or use a special cable as provided in the assembly kit of your actual transmitter.
2. Installation of two transmitter modules Duplex 2, 4GHz with the aid of the assembly kit SWTU-2. In order to achieve a maximum increase of remote control system reliability you may take advantage of two Duplex transmitter modules in line with two receiers. For this purpose you need the cable contained in the assembly kit SWTU- 2 which fits transmitters with standard connectors for instance the Graupner MC line). This cable is also applicable to other transmitters but it has to be adapted to the actual transmitter configuration or omitted altogether.

Connection of the external buzzer and earphones
An earphone or an additional external buzzer may be connected to the module TU2. Connection to the module TU2 is carried out by means of the gold plated pins as shown in the picture (polarity is of no significance). The module TU2 is able to recognize the connection of earphones and automatically disables the buzzer for generation of telemetric alerts. Alerts concerning loss of range, low receiver are generated into earphones as well as into the buzzer.

ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS

Assembly kit: Voice-1

1. Jack 3,5mm – Earphone connecting accessory
2. Ext. buzzer – accessory

Putting into operation

Pairing with the receiver and performance verification
Any receiver and transmitter module takes advantage of digital transfer for communication purposes, in order to enable direct address communication between the equipment it is necessary to apply the so called pairing between them. The description of a transmitter module is given by its unique address which after pairing to the receiver ensures, that the receiver will accept only data from this definite transmitter. There may be paired as many receivers as you like with the transmitter module, but a receiver can be paired to one transmitter only.Install the receiver into your model. If the equipment is switched on first time we explicitly recommend to ensure that no detrimental effects on health or property may occur due to unexpected receiver output conditions (for instance badly adjusted mixers, reversed outputs etc.).
Activate receiver pairing by means of the shorting plug (BIND PLUG), which is a part of the receiver. Plug-in the shorting plug into the connector “Ext.” and switch on the receiver. Then switch on the transmitter. If pairing was successful the transmitter will confirm this by a short beep (by a lower and then a higher tone). If no confirmation of a successful pairing occurs, try to repeat the whole procedure or try to verify via the JETIBOX whether the receiver is in „Normal Mode” (a receiver in „Clone Mode” is not allowed to transmit and hence cannot confirm pairing). After pairing confirmation remove the BIND PLUG from the receiver connector.
Verify correct reactions of the model to transmitter commands (servo deflections have to follow corresponding stick deflections). If not, check whether servos are plugged into correct positions and the receiver is correctly adjusted (adjustment of mixers etc.). DUPLEX receivers can be reset to original state by the JETIBOX (connected to the receiver) with the help of the menu Autoset-normal. DUPLEX Tx modules are adapted to cooperate with transmitters working with PPM signals. If the transmitter is switched to PCM mode or the installation has not been performed properly, the transmitter module will emit a repeated allert tone (3x long beep).

Range test
Before initial utilization of the transmitter (or receiver) it is advisable to make a range test and thus verify correct functions of the transmitter and receiver HF circuits. The transmitter can be switched to the test mode by the JETIBOX or by the BIND PLUG.
After connection of the JETIBOX to the transmitter select the item “Range Test” and push the button U (upward arrow). The transmitter will be switched to range test mode and the transmitted power will be decreased to less than 10%. This situation is reported acoustically by interrupted beeps (short and long tone). After pushing the button U again (upward arrow) the transmitter returns to normal state, the output power increases to the normal value and beeping ceases. Test mode activation by means of the BIND PLUG commences analogical to receiver pairing as shown above. However, after the pairing procedure keep the shorting plug plugged in the receiver. As long as the shorting plug remains plugged in, the transmitter will stay in range test mode. In this mode the transmitter behaves in the same way as if range test would have been activated by the JETIBOX. In order to stop this mode remove the shorting plug from the receiver. Place the model and transmitter at least 80 cm high above ground. A correctly working transmitter and receiver in test mode should have a range of at least 50 m. If not, first of all verify correct antenna installation (transmitter and receiver). If the test still shows no success, do not use the equipment and contact your dealer or a service center.

Automatic Test
The TX module comprises an automatic test system as well. After switching on the receiver and transmitter a quality evaluation of the transmission path including all antennas is being performed. The result is reported 1 second after switching on of the transmitter by an acoustic signal of the TX module. No signal at all after lapse of this period signifies a flawless transmision path. An impaired transmission quality is indicated by one to four tones of the TX module. One single tone can already occur if the model is slightly further away of the transmitter, but the transmission path is OK. If more tones are released check the TX antenna connection as well as positions of the RX antennas and make a range check.

Connection of the JETIBOX
As already mentioned the JETBOX terminal can be connected to DUPLEX Tx transmitters. With the help of this terminal transmitter data and parameters as well as currently connected equipment (receivers, telemetric senzors etc. may be displayed and adjusted
DUPLEX transmitter modules are equipped with a three pin connector (see marking) intended for connection of the JETBOX. Connection can be easily done by the interconnection cable delivered with the JETBOX. When connecting pay attention to correct orientation of the connectors. We recommend to connect or disconnect the JETIBOX only, if the transmitter is switched off. When the transmitter has been switched on you will be able to skim through items of the transmitter or other connected equipment with the help of the JETIBOX push buttons.

Parameter Adjustment with Help of the JETIBOX
When connecting the JETBOX terminal to the transmitter you may select whether you want to display and adjust transmitter parameters (Tx), connected receivers (Rx) or other equipment (Mx) which is able to communicate with the JETIBOX. Communication with Rx and Mx is only possible if the transmitter module and receiver are paired and if there exists a radio link. This situation is shown in the LCD display by a downward showing arrow beside the Mx and Rx text.
After adjustment of the claimed item (Tx/Rx/Mx) push the button D (downward arrow). Afterwards you may skim with help of pushbuttons through the menu of the selected equipment. When working with equipment Rx or Mx you may get back to the transmitter module menu Tx by holding down button U (arrow upward) for a time longer than 2 seconds.
The menu structure of the transmitter module as shown by the JETIBOX see Diagram.

Summary of Transmitter Items
The introductory display shows the transmitter type. By pushing button R (right arrow) the identification numbers of the transmitter module and of the actual paired receiver are displayed.
Diag – shows more detailed informations about the transmitter and paired receiver condition.
Identification of the active receiver antenna (A1/A2) and of the actual signal intensity rated from 0 to 9 (best).
On the right side according to condition the following indicators may be shown:

• R – Range Test mode (range test)
• P – after switching on the transmitter has not yet been paired (did for the moment not yet find a paired receiver)
• S – there are no receiver data available (bad signal)
• T – low voltage of the transmitter battery
• B – low voltage of the receiver battery
• I – there are no PPM pulses from the transmitter accessible (installation error, PCM mode etc.)

Most of the conditions shown are accompanied by acoustic signals.
By pushing button U (upward arrow) range test mode may be activated.

ImpDiag – shows the actual number of transmitter PPM channels (K2 till K16, depends on transmitter type).
Volt MIN/ACT/MAX – minimum, actual and maximum value of transmitter module supply voltage. Reset (zeroing”) of the min. and max. values is always executed when the transmitter is switched on and after location of the paired receiver. Alternatively the displayed values may be reset by simultaneously pushing buttons Land R (left and right arrow).
Rx Signal Level – shows the actual signal intensities of individual RX antennas. The intensity is shown in steps from 0 till 9 and the highest rating of 9 indicates the best reception of a particular antenna. A dash (-) indicates that the TX module is not receiving any informations about the reception quality of the particular antenna. Either the receiver is not connected or backward transmission from the receiver to the transmitter is at the range limit.
Volt ACT/ALARM — shows the actual value of transmitter module supply voltage and the adjusted limit for an alert signal “T” (see menu Diag). By buttons L and R (JETIBOX buttons – left or right) the alert start limit may be adjusted.
Mx Tone 1 – enables adjustment of warning tone frequency (Hz), which reveals alert conditions of the connected equipment Mx (usually a telemetric senzor). A value of 0 indicates that the warning tone is switched off.
Mx Tone 2 – enables adjustment of information tone frequency (H), which informs about the alert condition of the connected equipment Mx. This tone has Morse alphabet character and follows immediately after the warning tone. A value of 0 indicates that the information tone is switched off.

RF Output Power

• allows setting an output power of Tx module. (Maximal output power can differ in different countries, according to local rules)
• transmitting in 2.4 GHz band with max. power 10mW
• transmitting in 2.4 GHz band with max. power 100m (recommended setting)
• transmitting in 2.4 GHz band operates in combination of 10mW and 100mW maw. power

Acoustical Condition Signalling
All types of transmitter modules are equipped with an acoustic output which is utilized for signalling of different transmitter, receiver or attached telemetric senzor conditions. The following conditions are reported by acoustic signals:

Alert indication by Morse alphabet signal, character of signal is given by the type and adjustment of attached equipment (receiver, telemetric senzor etc.).

For Tx modules we grant a warranty of 24 months from the day of purchase under the assumption that they have been operated in conformity with these instructions at recommended voltages and that they were not damaged mechanically. Warranty and post warranty service is provided by the manufacturer.
We wish you sucessful flying with the products of : JETI models.r.o. Pribor, www.jetimodel.com.

JETIBOX Diagram

The menu structure of the transmitter module by the JETIBOX Diagram

Tab. 2 – Assignment of Modules and Transmitters

Documents / Resources

| JETI model DUPLEX TU2 Transmitter Modules [pdf] Instruction Manual
DUPLEX TU2, DUPLEX TU2 Transmitter Modules, Transmitter Modules, Modules
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