user manual
Contents
1. Owner s Manual 3 RF Transmit Mode From the inactive condition Idle Mode the module switches to an RF transmission state when on the RSTX input line pin 14 is available a start bit low logic level OV and consequently at list one byte of data The mechanism of data transfer Store amp Forward may be described by pairs of operations in a sequence Unit A serial reception Unit A RF transmission Unit B RF reception Unit B serial transmission Fig 3 The lack of data at the XTR 7020A 8 module s input is established by the expiring of a Timeout determined according to the speed of the data serial Once it is off the transceiver does not memorize further incoming data until the RF transmission of those already inside its reception buffer is carried out The data is transmitted through an RF channel only after the serial reception is over In the same way the receiver analyzes the received packets from the RF proceeding then with the serial transmission if the data is valid or discarding them if not correct Unit A serial STORE gt Unit A RF FORWARD Unit A RF transmission Radiofrequency Valid packet from unit B and transmitted through serial port Unit B RF STORE gt Unit B serial FORWARD t ms Fig 3 Store amp Forward mechanism As shown by the Fig 3 time diagram the time interval from the starting moment instant 0 when the data reaches the module s port to the moment wh2. C Power supply 6V Input voltage 1 0 Vcc 0 3V Output voltage 1 0 Vec 0 3V Technical features Power consumption mode SSS Power consumption x mode 8 dBm 0m Power consumption tx mode 10 dBm dm Power consumption stand by mode s o m Logic level I in inpuvoupat Tee vw v Logic level 0 in input output 0 ves a a ee o Ta E Default setting Output Power tx l As input serial signal is intended 8 n 1 868 19 Technical specifications may be changed without notice AUR EL S p A declines all responsabilities deriving from a wrong utilisation of the equipment AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY 13 06 2008 Tel 389 0546 941124 Fax 39 0546 941660 Pag 2 of 13 http www aurelwireless com email rfecomm aurel it AUREL RELESS XTR 7020A 8 Owner s Manual Pins description Top View XTR 7020A 8 Re oe ea bi Fig 1 Device s pinout 1 3 RF GND Connection with RF ground plane Antenna connection 50 ohm impedance K 5 6 7 o Not in use in this model 9 10 18 GND Connection to ground plane 11 15 Serial speed selection pins The selection must be carried out before switching on the device Serial speed S5 0 S5 1 Vec 38400 115200 19200 57600 SP1 SP2 9600 9600 Test Mode Test Mode pseudonoise data packet RSRX Serial data output with TTL RS 232 logic with 1 start bit OV 8 data
3. 0A 8 related traffic downstream selectable via the register S7 and the number of Bytes forming the data packet In this way reading the signal CTS the unit linked upstream of the first XTR 7020A 8 will decide to don t submit data on the serial line as the XTR 7020A 8 in reception is used in the serial transmission of previous data packet The use of the register S16 The reading of the register S16 involves the activation of a procedure for analysis of RF channel where module is programmed This routine has set a duration of about 200ms The result of the analysis is provided at the end of the operation No other operation must be performed during this interval Channel analysis can be performed for determine if channel is busy and for checking the receiving quality and to verify the quality of reception in case you want to test the quality of a connection that is planning Answers to commands and operations on registers Positive answer OK lt CR gt lt LF gt Negative answer lt bl gt ERROR lt CR gt lt LF gt Forbidden operation lt bl gt NO ACCESS lt CR gt lt LF gt With lt CR gt Carriage Return ASCII character 13 lt LF gt Line Feed ASCII character 10 lt bl gt ASCII character 32 Reading of a register Syntax ATSx lt CR gt lt LF gt x 1 16 register to be read Answer value contained in the register if the command has been correctly issued followed by lt CR gt lt LF gt The registers value is returne
4. AUREL RELEssS XTR 7020A 8 Owner s Manual The XTR 7020A 8 is a 7 channel transceiver which compared with the XTR 903A 8 offers improved performance as such as longer RF range serial transmission speed and error checking It has the same pin out The data is transmitted in FSK modulation which assures a larger immunity to noise compared with amplitude modulation allowing a range of more than 300 m in free air by using omnidirectional antennas The XTR 7020A 8 allows data transfer by TTL RS 232 logic by utilising a microcontroller which operates the redundance over the RF data The speed of the data at the input serial port 9600 19200 38400 bps and 9600 57600 115200 bps according to S5 register setting can be set through SP1 and SP2 pins The data transmission is carried out according to store and forward technique the data entered the serial port is memorized in a buffer and forwarded only at the end of their reception During RF reception phase the bytes are memorized and transferred to the serial port only after checksum validation In case of failure the whole lot is rejected The data transmission delay between input and output ports depends upon packet length and speed of both serial connections The high serial speeds 57600 115200bps available allows compensation of the introduced packaging delays for instance a 64 Byte case at a serial speed of 115200bps the transmission delay shall be around 18ms which is comparabl
5. Power RF ON power 1 Power RF OFF S5 SER Selection of the serial speeds two benches 0 slow bench 1 fast bench CTS Selection on PIN 13 from 485 EN and CTS 0 485EN 1 CTS S7 SPD In the XTR 7020A 8 upstream of adio trafficking set the speed of the serial downstream so as to 1 19200 manage the activities of the pin 13 when mode CTS Ro S15 VERSION Code showing the firmware version S16 RSSI It supplies a digital indication of the power 0 Min power received received level with a gradual scale from 0 to 9 9 Max power received default values Channel not to be used with max power WRITE Writing of the registers values in EEPROM CC COMMAND Command Mode exit CLOSE Tab 3 commands Technical specifications may be changed without notice AUR EL S p A declines all responsabilities deriving from a wrong utilisation of the equipment AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY 13 06 2008 Tel 389 0546 941124 Fax 39 0546 941660 Pag 7 of 13 http www aurelwireless com email rfecomm aurel it AUREL RELEssS XTR 7020A 8 Owner s Manual Records s6 and s7 and CTS signal When the module XTR 7020A 8 is set to CTS S6 register programmed to 1 Pin 13 maintain an high logical level and becomes low when the unit begins to transmit data on RF The signal remains low for a time calculated on the basis of the alleged serial speed which is programmed the form XTR 702
6. absence of the ATCC command takes place automatically after approx 5 seconds of inactivity Operations It is possible to chain several operations by mixing actions on one single register and writing or exit commands on a single command line through the operator lt gt In the following example the S3 register s value is set to 2 the modification is saved and the programming function is quitted Example 1 Writing of a register and value save Exit from Command Mode ATS3 2 WR CC lt CR gt lt LF gt OK lt CR gt lt LF gt As it can be seen from the example the prefix AT is applied only for the first command of the line while for the subsequents must be skipped The commands chaining is possible only on one register at a time for writing operations if carried out along with a reading command it will engender an error answer Example 2 Register reading attempt and exit from Command Mode If it is attempted to enter the command ATS1 CC lt CR gt lt LF gt it will be realized that is not possible and that the module will indicate an error when the coma is typed The screen shall display what follows ATS1 lt bl gt ERROR lt CR gt lt LF gt The commands are not case sensitive therefore can be typed in upper or lower case See Appendix A for further examples Application Examples Fig 5 shows a typical application of the XTR 7020A 8 connected to a microcontroller that besides to receive and transmit data on the two input an
7. bit and 1 stop bit 3V The line must be driven at high logic level 3V 485EN CTS Pin 13 could be programmed by registers S6 and S7 In this way a transceiver RS485 could be enabled or close the data transmission upon the serial line CTS The 485EN line allows to drive the RS 232 RS 485 interface In correspondence of the output data on the RSTX line the signal reches a high logic level RSTX asen fo LL CTS signal is driver in a lower logic signal when unit connected to the RSTX line doesn t transmitt any data XTR 7020A 8 connection components are busy in previous sending operations RSTX Serial data input with TTL RS 232 logic with 1 start bit OV 8 data bit and 1 stop bit 3V The line must be driven at high logic level 16 PWRDN Device state In Power Down the transceiver XTR 7020A 4 goes off reducing the consumption to less than 20uA PWRDN STATE C o I O Technical specifications may be changed without notice AUR EL S p A declines all responsabilities deriving from a wrong utilisation of the equipment AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY 13 06 2008 Tel 89 0546 941124 Fax 39 0546 941660 Pag 3of 13 http Awww aurelwireless com email rfecomm aurel it AUREL RELEssS XTR 7020A 8 Owner s Manual It is recommended not to leave the pin under a variable voltage if inactive in order to avoid module s malfunctionings Module s supply 3V duly filtered and adj
8. d figure by figure under ASCII value Example 16 is the sequence of ASCII codes 0x31 0x36 corresponding precisely to figure 1 and 6 Such interpretation procedure must be followed even for the writing of a register s value Writing of a register Syntax ATSx Y lt CR gt lt LF gt x 2 3 4 register to be written y value to be entered Answer as indicated to Answers to commands above All values programmed in the registers cause a variation of the module s operating conditions that will be lost once the device is switched off unless they are saved in the EEPROM memory of the microcontroller by means of the relevant command ATWR in such case the modified values shall be active also to subsequent switching on Technical specifications may be changed without notice AUR EL S p A declines all responsabilities deriving from a wrong utilisation of the equipment AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY 13 06 2008 Tel 389 0546 941124 Fax 39 0546 941660 Pag 8 of 13 http Awww aurelwireless com email rfecomm aurel it AUREL RELEssS XTR 7020A 8 Owner s Manual Command to save the registers value in EEPROM Syntax ATWR lt CR gt lt LF gt Answer as indicated to para Answers to commands above Exit command from Command Mode Syntax ATCC lt CR gt lt LF gt Answer as indicated to para Answers to commands above The exit from Command Mode in
9. d output lines RSTX and RSRX it drives also the PWRDN Technical specifications may be changed without notice AUR EL S p A declines all responsabilities deriving from a wrong utilisation of the equipment AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY 13 06 2008 Tel 389 0546 941124 Fax 39 0546 941660 Pag 9 of 13 http www aurelwireless com email rfecomm aurel it AUREL RELEssS XTR 7020A 8 Owner s Manual Microcontroll Fig 5 Example of a 9600 bps connection SP1 and SP2 to Vcc between a XTR 7020A 8 and a microcontroller Fig 6 shows an example of connection between an XTR 7020A 8 module and the serial port of a PC the integrated circuit interposed between the transceiver and the port performs only the conversion function between the electrical levels of the RS 232 and the TTL logic By means of the RTS signal pin 7 of the DB9 port it is possible to drive the PWRDN line while the serial speed selection is fixed to 9600 bps Vec MAX 232 1 RF GND GND 18 oa 2 Antenna Vcc 17 O 3 RF GND PWRDN 16 9 R20UT O 2 SP2 15 RIIN 13 O E TXD 14 12RIOUT R2IN 8 O XTR 7020A 8 ene lo RXD 12 10 T2IN O SP1 11 lee GND 10 DB9 Fig 6 Example of the connection between an XTR 7020A 8 and the serial port RS 232 at 9600 bps SP 1 and SP2 to Vcc Technical specifications may be changed without notice AUR EL S p A decl
10. e therefore to XTR 903A 8 The maximum packet length is 240 Byte By sending AT type commands the communication channel the serial speed and the outlet power can be selected and the RF channel occupation be monitored The module is mechanicaly compact and maintains the same reduced dimensions of the XTR 903A 8 model 23 x 33 mm The supply voltage is 3 Volt The maximum power consumption is reduced to 20 uA in stand by condition Features Applications RS 232 signals store and forward operation Wireless handsfree No code or preamble demanded to User House automation AT Commands for internal registers programming Telemetry HyperTerminal compatible Access control Number of channels 7 Instruments monitoring Compact dimensions 23x33 mm Data acquisition Bit rate 9600 19200 38400 57600 115200 bps POS terminals Power transmitted 10 mW max 3v power supply Typical range 300 m Trade Mark by Hilgraeve Inc Technical specifications may be changed without notice AUR EL S p A declines all responsabilities deriving from a wrong utilisation of the equipment AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY 13 06 2008 Tel 389 0546 941124 Fax 39 0546 941660 Pag 1 of 13 http Awww aurelwireless com email rfecomm aurel it AUREL RELEossS XTR 7020A 8 Owner s Manual Absolute limits Operating temperature 20 C 70 C Storage temperature 40 C 100
11. en it is received by the remote module is the function of the number of Bytes that form the packet and of the serial speeds used for the reception as well as for the transmission Technical specifications may be changed without notice AUR EL S p A declines all responsabilities deriving from a wrong utilisation of the equipment AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY 13 06 2008 Tel 389 0546 941124 Fax 39 0546 941660 Pag 5of 13 http www aurelwireless com email rfecomm aurel it AUREL RELEssS XTR 7020A 8 Owner s Manual For the correct operation of the device consider that the phases contemporaneity inside the same unit is not allowed for instance the data that possibly has entered through serial port of unit A is not memorized in the input buffer if the same unit is in RF transmission phase Same thing for unit B it is not allowed to receive RF data while the previous bytes packet is under serial transmission Fig 4 shows the case of the transmission of two packets in a sequence from unit A to unit B packet 1 enters unit A and is transmitted to unit B that forwards it through the serial port The transmission of the packet 2 must be carried out bearing in mind that the end of the serial reception of unit A has to take place AFTER the end of the serial transmission of packet 1 by unit B so to avoid the overlapping of the RF reception and of the serial transmission phases in this device i
12. gt 8 434 42 MHz channel OK lt CR gt lt LF gt Example 7 Output power reding OK lt CR gt lt LF gt ATS3 lt CR gt lt LF gt 1 lt CR gt lt LF gt 1 power 2dBm Example 8 Output power selection OK lt CR gt lt LF gt Technical specifications may be changed without notice AUR EL S p A declines all responsabilities deriving from a wrong utilisation of the equipment AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY 13 06 2008 Tel 389 0546 941124 Fax 39 0546 941660 Pag 12 of 13 http www aurelwireless com email rfecomm aurel it AUREL Owner s Manual ATS2 3 lt CR gt lt LF gt 3 power 10dBm OK lt CR gt lt LF gt Example 9 Reading of the received signal OK lt CR gt lt LF gt ATS16 lt CR gt lt LF gt 9 lt CR gt lt LF gt 9 busy channel maximum received power Example 10 Reading of the received signal OK lt CR gt lt LF gt ATS16 lt CR gt lt LF gt 0 lt CR gt lt LF gt free channel minimum received power Technical specifications may be changed without notice AUR EL S p A declines all responsabilities deriving from a wrong utilisation of the equipment AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY 13 06 2008 Tel 389 0546 941124 Fax 39 0546 941660 Pag 13 of 13 http www aurelwireless com email rfecomm aurel it
13. ines all responsabilities deriving from a wrong utilisation of the equipment AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY 13 06 2008 Tel 389 0546 941124 Fax 39 0546 941660 Pag 10 of 13 http www aurelwireless com email rfecomm aurel it AUREL RELEssS XTR 7020A 8 Owner s Manual Standards of reference The XTR 7020A 8 transceiver complies with European Standards EN 300 220 and EN 301 489 The tests are carried out transmitting and receiving Pseudo Random CEPT 70 03 Codes The occupation band is verified by using a Pseudo Random Code at 115200 bps Besides the product has been tested according to EN 60950 Standards and it is utilized inside a special isolated case which guarantees its compliance to the above mentioned Standards The transceiver must be fed by a very low voltage and safety source protected against short circuits The usage of the transceiver module is foreseen inside cases that guarantee the compliance to EN 61000 4 2 Standards not directly appliable to the module itself In particular is left to user s care the isolation of the connection to the outdoor antenna and of the antenna itself since the RF output of the receiver is not in the position to directly bear the electrostatic charges foreseen by the a m standards CEPT 70 03 Reccommendation The XTR 7020A 8 transceiver operates in a harmonized frequency band therefore in order to comply with the current regulations the device mu
14. st be utilized in the time scale for a maximum hourly duty cycle less then one specified on CEPT 70 03 Reccommendation The antenna suggested solution loop antenna guarantees the compliance with the regulation concerning the irradiated power Mechanical dimensions Top View em fo ht aD r TOREPE XIR 7020A 8 129 JS HEr D O D O 0 a o d 5 A 7 5 204mm 6 6mm Fig 7 Mechanical dimensions Technical specifications may be changed without notice AUR EL S p A declines all responsabilities deriving from a wrong utilisation of the equipment AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY 13 06 2008 Tel 389 0546 941124 Fax 39 0546 941660 Pag 11 of 13 http www aurelwireless com email rfecomm aurel it AUREL RELEssS XTR 7020A 8 Owner s Manual Appendix A More examples of operations with registers Example 3 reading of the module s operating band OK lt CR gt lt LF gt ATS1 lt CR gt lt LF gt 0 lt CR gt lt LF gt O 433 434 MHz band Example 4 variation of the module s operating band OK lt CR gt lt LF gt ATS1 2 lt CR lt LF gt lt bl gt NO ACCESS lt CR gt lt LF gt Syntax error the S1 register is available for reading only Example 5 Channel reading OK lt CR gt lt LF gt ATS2 lt CR gt lt LF gt 2 lt CR gt lt LF gt 2 433 5 MHz channel Example 6 Channel selection OK lt CR gt lt LF gt ATS2 8 lt CR gt lt LF
15. t is therefore necessary to enter a safety interval between the transmissions of the two packets in function of the number of byte of the first packet of the serial speed of unit B and in function of the time required Tgr ms for the transmission of the packet on the RF which depends upon the number of bytes of the packet and it is given by 1 op ms 3 14 0 139 N Be The last byte of the second packet must enter unit A after unit B has ended the serial transmission of the first packet Packet 2 cannot enter unit A while the RF transmission of packet 1 is in progress 0 t ms Fig 4 Two data packets transmission 5 Power Down Mode By bringing to high level 3V pin 16 PWRDN the device enters into a power saving state the consumption in fact is limited to less than 10 WA In this mode the transceiver can neither receive nor transmit It is necessary to commutate pin 16 to low level OV to bring it back to the normal operating state Idle mode In such a state the RSTX line must be maitained to the high logic level 3V to avoid a wrong data transmission when the module is switched on 6 Command Mode XTR 7020A 8 Technical specifications may be changed without notice AUR EL S p A declines all responsabilities deriving from a wrong utilisation of the equipment AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY 13 06 2008 Tel 389 0546 941124 Fax 39 0546 941660 Pag 6 of 13 ht
16. tp www aurelwireless com email rfecomm aurel it AUREL RELESS XTR 7020A 8 Owner s Manual The Command Mode state allows the Owner to configure the operating parameters of the device The programming is carried out by means of AT type commands sent to the RSTX line pin 14 at the speed set by means of pins SP1 and SP2 pin 11 and 15 The module s answers shall be given on the RSRX line pin 12 To enter Command Mode from Idle Mode it is necessary to send on the RSTX line pin 14 a sequence of 3 consecutives ASCII characters 1 e A module under Command Mode state is unabled to RF reception Available Registers and Commands The commands that can be issued to XTR 7020A 8 module concern the reading and writing of the registers containing the operation setting of the device The reading and writing of the configuration register and the sending of the commands to the module is carried out by entering the AT sequence before the command s or register s name The 16 programmable registers from S1 to S16 can be read or written according to their function Values RW BAND Operating band of the transceiver 0 868 870 MHz R S2 CHANNEL Operating channel 0 868 19 MHz 3 1 868 34 MHz 2 868 49 MHz 4 868 80 MHz 5 868 95 MHz 6 869 11 MHz 11 869 87 MHz 3 Device s output power level 0 8dBm 1 2dBm 2 4 dBm 3 10 dBm It switches On or OFF the module s transmission 0
17. usted Tab 1 Pins description XTR 7020A 8 Operating mode The device s operating modes can be summarized in 6 conditions Fig 2 RF Transmit Mode 1 Test Mode 2 Idle Mode 3 RF Transmit Mode RF Receive Mode 4 RF Receive Mode 5 Power Down Mode 6 Command Mode 4 Command Test Mode Mode Fig 2 Operating modes 1 Test Mode The Test Mode can be reached by short circuiting pins SP1 and SP2 to ground prior to switching on the device According to S5 register containt two different test modes can be obtained e S5 0 An RF continuous transmission of a carrier madulated by a 20 kHz signal composed by a sequence of pseudorandom data e S5 1 Transmission of a data packet defined by a 4 digits incremental numerical value To exit such mode the supply must be cut off and a new configuration of SP1 and SP2 must be selected 2 Idle Mode It is the initial rest state of the device when is switched on Gif SP1 and SP2 select the Test Mode in such operating mode the transceiver waits the data reception from RF or from the RSTX serial line Technical specifications may be changed without notice AUR EL S p A declines all responsabilities deriving from a wrong utilisation of the equipment AUREL S p A Via Foro dei Tigli 4 47015 Modigliana FC ITALY 13 06 2008 Tel 389 0546 941124 Fax 39 0546 941660 Pag 4of 13 http www aurelwireless com email rfecomm aurel it AUREL RELESS XTR 7020A 8
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