Transceiver mod. XTR-434
Contents
1. De coupling Capacitor 50 Q Line 50 Ohm Line connection between antenna and pin 2 1 It must be the shortest as possible 2 1 8 mm wide for 1 mm thick FR4 printed circuits and 2 9 mm wide for 1 6 mm thick FR4 printed circuits On the same side it must be kept 2 mm away from the ground circuit 3 On the opposite side a ground circuit area must be present Technical features are subject to change without notice AUR EL S p A does not assume responsibilities for any damage caused by the device s misuse AUR EL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev A 16 12 2002 Tel 390546941124 Fax 390546941660 Pag 5 di 6 http www aurel it email aurel aurel it AUR EL XTR 434x0x Instruction Manual Antenna connection 1 It may be utilized as the direct connection point for the radiating whip antenna 2 It can bear the connection of the central wire of a 50 Q coaxial cable Be sure that the braid is welded to the ground in a close point Antenna A whip antenna 16 5 mm long and approximately 1 mm dia brass or copper wire made must be connected to the RF input of the transceiver The antenna body must be keep straight as much as possible and it must be free from other circuits or metal parts 5 cm minimum suggested distance It can be utilized both vertically or horizontally provided that the connection point between antenna and receiver input is surrounded by a good ground plane N B2. As an alternative to the a m antenna it is possible to utilize the whip model manufactured by Aurel see related Data Sheet ed Application Notes By fitting whips too different from the described ones the CE Certification is not assured Other components 1 Keep the receiver separate from all other components of the circuit more than 5 mm 2 Keep particularly far away and shielded all microprocessors and their clock circuits 3 Do not fit components around the 50 Ohm line At least keep them at 5 mm distance 4 If the Antenna Connection is directly used for a radiating whip connection keep at least a 5 cm radius free area In case of coaxial cable connection 5 mm radius will suffice Reference Rules The XTR 434 transceiver is CE certified and in particular it complies with the European set of Rules EN 300 220 3 and EN 300 489 The equipment has been tested according to rule EN 60950 and it can be utilized inside a special insulated housing that assures the compliance with the above mentioned rule The transceiver must be supplied by a very low voltage safety source protected against short circuits The use of the transceiver module is foreseen inside housings that assure the overcoming of the provision EN 61000 4 2 not directly applicable to the module itself In particular it is at the user s care the insulation of the external antenna connection and of the antenna itself since the RF output of the receiver is not built to directly
3. bear the electrostatic charges foreseen by the a m provision CEPT 70 03 Recommendation In order to comply with such rule the maximum hourly duty cycle of the device must be the 10 i e 6 min per hour The utilisation of such device inside any national territory is subject to the Postal Code and Telecommunications rules in force In Italy is art 334 and subsequents Technical features are subject to change without notice AUR EL S p A does not assume responsibilities for any damage caused by the device s misuse AURCEL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev A 16 12 2002 Tel 390546941124 Fax 390546941660 Pag 6 di 6 http www aurel it email aurel aurel it
4. no transition from ON to OFF or OFF to ON This not to downgrade the RX sensitivity It is requested that modultation is carried on with techniques that allow a low duty cycle such as Manchester coding 8 to 12 bit coding or other available technique If no bit balancing technique is used if it is requested to work with RS232 protocol a minimum speed of 57 600 bps is required to assure maximum performance transmitting for example one byte followed by the complementary byte byte balancing XTR 434L While modulation is applied to TX conditioning input pin pin 14 with a logic signal it is reccomended not to exceed 1000 us continuous time with no transition from ON to OFF or OFF to ON This not to downgrade the RX sensitivity It is requested that modultation is carried on with techniques that allow a low duty cycle such as Manchester coding 8 to 12 bit coding or other available technique If no bit balancing technique is used if it is requested to work with RS232 protocol a minimum speed of 9 600 bps is required to assure maximum performance transmitting for example one byte followed by the complementary byte byte balancing Rx reaction minimum time Minimotempod intervento Rx Rx line enable Linea Rx enable Rx status OFF ON e ACCESO Stato Rx OFF Preamble Preambolo VALID DATA e DATI VALIDI Received data Dati ricevuti a 2 mS XTR 434 3 mS XTR 434L Technical features are subject to change without no
5. AUR EL Transceiver mod XTR 434 Miniaturized data transceiver modules 100 Kbps XTR 434 or 50 Kbps XTR 434L maximum speed 433 92 MHz operating frequency XTR 434xxx Instruction Manual Pin Out and Block diagram Dimensions 1 GND 18 GND 33 2 Antenna ee 17 Vcc d 1 i 3 GND 16 Rx EN x H of 4 NC 15 Tx EN ui AUREL O roo Kbps TRANSCEIVER aH 5 NC 14 Mod in z XTR 434 6 NC 13 Analog out i CE z g 7 NC 12 Data out C z gt 8 NC 11 C D 18 1 0 5 9 GND 10 GND Connections Pin 1 3 RF GND RF circuit GND Pin 2 Antenna 50Q impedence antenna connection Pin 9 10 18 GND Connections to GND Internally connected also to the module s shield Pin 11 CD Carrier Detect With enabled receiver a low signal voltage level OV indicates that the receiver detects an RF carrier The line activates with an RF signal of about 96 dBm applied to pin 2 antenna High impedance output available only for loads under CMOS logic Pin 12 RXD Receiver data output Load impedance allowed over gt 100KQ No capacitance allowed Pin 13 AF Filtered and buffered output representing the analogic output of the FM detector Load impedance allowed over 2KQ and less than 100pF Pin 14 TXD Input to transmitter accepts serial data in TTL logic 0 5V with a 10KQ load impedance Pin 15 TX ENABLE Active when low voltage level OV enables the transmitter circuit 1mA r
6. del has the lowest time being in operation in 2 ms after Rx Tx inversion XTR 434L model will require 3 ms turn around time for same function It is reccomended that above minimum times are taken in consideration while choosing the desired device as opposed to a very short switching time an ultrafast modulation technique is required with difficulties to carry it on Technical features are subject to change without notice AUR EL S p A does not assume responsibilities for any damage caused by the device s misuse AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev A 16 12 2002 Tel 390546941124 Fax 390546941660 Pag 4di 6 http www aurel it email aurel aurel it Air EL XTR 434xxx Instruction Manual RF Sensitivity The declared technical features have been obtained by applying the following testing system RF 100dBm Pseudo Digital OUT random code RF Gen amp g 76 8 Kbps XTR 434 Modulator 38 4 Kbps XTR 434L Devt 25KHz B E R XX Variable Phase Measure CY adjust for maximum performance Ground 1 It must surround at the best the welding area of the module The circuit must be double layer with throughout vias to the ground planes approximately each 15 mm 2 It must be properly dimensioned specially in the antenna connection area in case a radiating whip antenna is fitted in it an area of approximately 50 mm radius is suggested Ground Ground Power Supply
7. equired current Pin 16 RX ENABLE Active when low voltage level OV enables the receiver circuit 1mA required current Pin 17 Vcc Connection to the positive pole of the supply voltage 5V 10 The technical tests and reports have been carried out and obtained by the laboratories PRIMA RICERCA amp SVILUPPO via Campagna 58 22020 Gaggino Faloppio CO Italy Technical features are subject to change without notice AUR EL S p A does not assume responsibilities for any damage caused by the device s misuse AURCEL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Tel 390546941124 Fax 390546941660 http www aurel it email aurel aurel it Rev A 16 12 2002 Pag 1di6 AUR EL Technical features XTR 434xxx Instruction Manual Characteristics Min Typical Max Unity Remarks Voltage supply 4 5 5 5 5 Vdc Supply current TX ON 24 28 32 mA Supply current RX ON 10 11 12 mA Supply current TX RX OFF 100 nA RX SECTION Reception frequency 433 92 MHz RF sensitivity XTR 434 100 102 dBm See note 1 RF sensitivity XTR 434L 103 105 dBm See note 1 IF passband 150 KHz Interferences rejection 80 dB at 5 band limits RF spurious emissions in antenna absent See note 2 Output square wave XTR 434 10 50 KHz Output square wave XTR 434L 2 5 25 KHz Output low logic level 0 1 V See n
8. ote 4 Output high logic level 3 5 V See note 4 Carrier Detect CD threshold 96 98 dBm TX SECTION Transmission frequency 433 92 MHz Modulation passband XTR 434 10 50 KHz Modulation passband XTR 434L 2 5 25 KHz FM deviation 25 KHz TX output power 10 dBm Antenna impedance 50 Q RX switch on time 1 ms TX switch on time 1 ms Working temperature 20 80 C Working temperature ETS 300 220 20 55 C Dimensions 33 x 23 x 8 mm Notei XTR 434 test as Fig 3 RF IN 100 dBm FM Deviation 25KHz and Modulation frequency 40 KHz XTR 434L test as Fig 3 RF IN 103 dBm FM Deviation 25KHz and Modulation frequency 20 KHz Note2 The R F emission measure has been obtained by direct connection of the spectrum analyser to XTR module pin 2 Note3 Switch on time is the time required by the device to acquire the declared characteristics from the very moment the enable signal is applied Note4 Values obtained with a 10KQ load applied TX RX Enabling Pin 15 TX ENABLE and 16 RX ENABLE can acquire the following status Pin 15 TX ENABLE Pin 16 RX ENABLE Functions 1 1 Disabled module 1 0 Enabled receiver 0 1 Enabled transmiter 0 0 Not to be used condition Technical features are subject to change without notice AUR EL S p A does not assume responsibilities for any damage caused by the device s misuse AURCEL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Tel 390546941124 Fa
9. tice AUR EL S p A does not assume responsibilities for any damage caused by the device s misuse AURCEL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY Rev A 16 12 2002 Tel 390546941124 Fax 390546941660 Pag 3 di 6 http www aurel it email aurel aurel it AOR EL XTR 434x0x Instruction Manual Device Usage To take advantage of the performances detailed in the Technical Specifications and in order to comply with the operating conditions which characterize the Certification the transmitter must be fitted on a printed circuit considering the followings 5 Vdc supply 1 The transceiver must be supplied by a very low voltage source safety protected against short circuits 2 Maximum voltage variations allowed 0 5 V 3 De coupling next to the transmitter by means of a minimum 100 000 pF ceramic capacitor 4 It is suggested to place in series to the suppl a 10 Q resistance as closer as possible to pin 17 Reference curves Reception timing Tempistica di ricezione Rx line enable Linea Rx enable Rx status OFF ON e ACCESO Stato Rx OFF 1imS gt Noise Preamble Rumore Preambolo Received data DATI VALIDI Dati ricevuti u lt 2 mS XTR 434 3 mS XTR 434L VALID DATA Usage of devices in net systems The devices were designed to have the minimum switching time between reception and transmission taking into account the minimum transmission speed required XTR 434 mo
10. x 390546941660 http www aurel it email aurel aurel it Rev A 16 12 2002 Pag 2 di6 AUR EL XTR 434x0x Instruction Manual Considerations over the TX RX serial data Pulse amplitude time the circuit characteristics passband in base band and AC couplings determine the length of the time between each two consecutive level transitions on the line of the serial signal For the correct operation of the XTR 434 such time must be comprised between 10 us and 200 uS and for XTR 434L between 20 uS and 1000 pS Settling time of the Data Slicer requires that for 1 ms XTR 434 and 2 ms XTR 434L before the data themselves a preamble composed by a square wave is transmitted in order to consider reliable the data coming out from the RXD line Bit ON Bit OFF relation the Data Slicer is optimized for a 50 50 duty cycle It will continue to operate even with bigger distortion and less tolerance to interferences till a 30 70 or 70 30 duty cycle Therefore there is no possibility to directly transmit an RS232 sequence if no action is done to balance the 1 and 0 bits ratio as the duty cycle could reach up to 90 preventing the proper performance of receiverIt will continue to operate even with bigger distortion and less tolerance to interferences till a 30 70 or 70 30 duty cycle XTR 434 While modulation is applied to TX conditioning input pin pin 14 with a logic signal it is reccomended not to exceed 200 us continuous time with
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