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XDAS-V2 user manual

1. peau peau 10 28je 2 wesaippmenpow pieoq Jo depy Duisseooidjeufig Buisseooud jeubis waysAs qns Wa sAs qns Issue 1 23 October 2007 Sens Tech Limited 2007 XDAS V2 User Manual page 29 of 44 a E Un 2 E Un SENSOR TECHNOLOGIES SL appendix D continued Frame Grabber connections SIU JO 2 6 J9j94 9se9 g Uonoe UonoeuuooJe ul y JO 55 spJeoq Bul DuisseooJd jeus ay uo 2 YOUMS Buisn Husn ejqeuuuueJ60Jd s 5 55245 uonoeuuoo Buisseooud jeubis Ov uonoeuuoo peau 06 uonoeuuoo 10j28jep 06 1 2 19208 IXd IOd IN Jojdepe IXd l9d pees OG 1 5 g sseJjppe Z 5 eau 0 2 eau 10 23 eau 1 eau ssaippe 10j ejeq peau peau 9 peau 10 99 98q
2. Op uonoeuuoo uonoeuuoo e npouu 06 peau 06 pueog yeyoos uoneuliuue WG eiqe gv asn cIVWOO uoneutuue Jejnduio5 B uod asn peal gt 1 pZ ss ppe npow SseJppe cL sseJppe Bunoeuuoo eau 1012918 eau eau 4012918 eau J E sseuppe 10 99 8q peau 10 ejeq 10 ejeq 1o0jogje sseJppe 06 Buisseooid jeubig Duisseooud jeubis wa sAs qn uiejs s qn m 5 5 4 u JSAS QNS aveau 2850 appendix D continued USB2 remote connections Sens Tech Limited 2007 page 32 of 44 Issue 1 23 October 2007 XDAS V2 User Manual cw SENS TECH SENSOR TECHNOLOGIES appendix E USB2 protocol USB2 0 High Speed Mode Bulk transfer protocol for data acquisition Integrated control and data interface XDAS SDK library files available with example code XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 33 of 44 c SENS TECH SENSOR TECHNOLOGIES system data bus waveforms These clock pulses are not present if PCLK is gated with LVAL The un gated PCLK mode is only available in a single SP board system Two header bytes are transmi
3. head input AN boards 4 channels data data local control sync controls XDAS V2 User Manual Issue 1 23 October 2007 Sens Tech Limited 2007 page 27 of 44 c SENS TECH lt SENSOR TECHNOLOGIES appendix C continued system block diagram for a system of n boards NENNEN local 2 5 to 20 MB s 8 Bit ZEE yo RS485 Power OV XDAS V2 User Manual Issue 1 23 October 2007 Sens Tech Limited 2007 page 28 of 44 SENS TECH SENSOR TECHNOLOGIES SL appendix D cable interconnections High speed data I O PCI 7300A connections SIU JO Z G Uonoeuuoo2Je ul y JO 55 spJeoq DuisseooJd jeus ay uo 2 yms ejqeuuuueJ60Jd s sisseyo uonoeuuoo Buisseooud jeuBis 7 peau 06 uonoeuuoo 09 QN9 Je 1nO jexooseuy utului 2 19205 1 4 aveau 00 1 peaj Burpeuuoo OG pz 5 Z sseuppe ssauppe d eau 10 29 9 eau 10 23 eau J a eau 10 29 9
4. 2mm pitch male IDC header for local bus input E TEC SLS 050 H562 55 2 mates with 2mm pitch female IDC connector E TEC IDS 050 S200 95 P J3 is the output connector and J4 is the input connector The output of each DH board is connected to the input of the next to form a chain of up to 12 DH boards The output of the first DH board is connected to relevant local bus connector on the SP board Each SP board can accept two daughter chains of 12 DH boards each The input of the first DH board in every chain must be properly terminated XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 25 of 44 cw SENS TECH SENSOR TECHNOLOGIES appendix B environmental conditions 1 temperature operating 5 to 35 C 2 sinusoidal vibration all 3 axes non operating 10 to 500 Hz for 10 cycles in each axis at peak amplitude of 2 g 1 octave min 3 random vibration all 3 axes non operating 10 20 Hz roll on 6 dB octave 20 50 2 0 02 g Hz 50 500 Hz roll off 6 dB octave at 500 Hz 0 001 g Hz 4 humidity non condensing 93 at 30 C 5 pressure for transportation can withstand pressure reductions from 68 kPa 1 bar to 100 kPa 0 68 bar XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 26 of 44 c SENS TECH lt SENSOR TECHNOLOGIES appendix C detector head board signal processing board signal processing board 24 control detector lt analogue
5. SENS TECH SENSOR TECHNOLOGIES T SENS TECH SENSOR TECHNOLOGIES XDAS V2 X ray data acquisition system XDAS V2 User Manual Issue 1 23 October 2007 Sens Tech Limited 2007 page 1 of 44 cw SENS TECH SENSOR TECHNOLOGIES contents page 1 introduction 1 1 general 3 1 2 applications 3 1 3 features 3 1 4 product 3 2 precautions 2 1 supply voltage 5 2 2 maintenance 5 2 3 cleaning 5 2 4 environment 5 2 5 radiation 5 2 6 connections 5 2 7 electrical screens 5 3 installation 3 1 system requirements 6 3 2 interfaces 6 3 3 mounting 7 3 4 software installation 8 3 5 software operation 9 4 start up software 4 1 command interpreter 10 4 2 X ray data acquisition 14 5 advanced user guide 5 1 the control channel 15 5 2 the data channel 17 5 3 additional configuration jumpers 19 6 troubleshooting 20 7 module and system operation 7 1 XDAS module operation 21 7 2 XDAS system operation 21 8 appendix appendix A interface characteristics 23 appendix environmental conditions 26 appendix block diagrams 27 appendix D interconnections 29 appendix E USB2 protocol 33 appendix system data bus waveforms 34 appendix G detector pin out 36 appendixH outline drawings 40 appendix peripheral connections 42 XDAS V2 User Manual Issue 1 23 October 2007 Sens Tech Limited 2007 page 2 of 44 cw SENS TECH SENSOR TECHNOLOGIES 1 introduction 11 general XDAS is a modular system of boards f
6. BEE 10002 The following facilities are available from the X ray Data Acquisition menu bar file open save save as settings exit edit view graph only channel as graph type window data acquisition command interpreter cascade help help About XDAS V2 User Manual enables the user to select a previous set of results for analysis enables the user to save a set of results allows the data and control interface to be selected as defined in section 3 installation exits the program copies data to the clipboard to enable it to be pasted into other software applications such as a spreadsheet or word processor displays graph only channel number table referenced to channel numbers 1 to 8064 or module channel table referenced as module and channel number ie 1 63 module 1 channel 63 selects bar line or bar line combination display types switches on off the graphical display switches on off the command interpreter allows data acquisition and command interpreter to be cascaded future option For help contact the Sens Tech technical help line Opens a software information shield Issue 1 23 October 2007 page 14 of 44 9 Sens Tech Limited 2007 cw SENS TECH SENSOR TECHNOLOGIES 5 advanced user guide XDAS V2 has two interface channels These are the control channel and the data channel The control channel is used to issue commands to the
7. Half full scale output even without any signal Remove and reinsert the local bus termination socket carefully Check that offset adjustment potentiometer VR1 is not damaged Output data image is scrambled Check that the readout order is set correctly using DIP switches B and C Output is not synchronised Check that header bytes are enabled disabled as required using the DIP switch H Software will not install Check computer running Microsoft Windows 98 or later No readings can be taken Check unit connected to the USB2 port data card or frame grabber has been correctly installed System not operating correctly with multiple signal processing boards Check addresses are set correctly Please contact Sens Tech for further support XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 20 of 44 cw SENS TECH SENSOR TECHNOLOGIES 7 module and system operation 11 XDAS module operation A schematic of a single XDAS module is shown on the module block diagram appendix C The detector array is connected to the board via 4 x 16 way 1 6 mm pitch or 4 x 32 way 0 8 mm pitch headers The dual energy boards are available in 1 6 mm or 2 5 mm pitch and has a second row of detectors connected to the back of the board The single energy board will accept 1 6 mm or 0 8 mm pitch arrays Current from the photodiodes is measured by a custom designed microcircuit containing 128 charge integrating amplifie
8. nSCAN There is an option to start and stop the scan using hardware for example to synchronise scanning to an X Ray shutter nSCAN is a 5V CMOS signal locally pulled high and should be input to the first SP board in the system The module address does not matter nSCAN is then bussed to other modules over the system bus By default nSCAN is a level triggered pin and as such when nSCAN is Logic 0 continuous scanning begins When nSCAN is Logic 1 continuous scanning stops Switch A switches nSCAN from level Set Not Set triggering to edge triggering on both rising nSCAN edge triggered nSCAN level triggered and falling edges factory setting For edge triggering there is one line acquisition and readout for each of the rising and falling edges The integration time and subsamples are set using the serial control interface XDAS ignores any nSCAN edges that appear while the current integration cycle is in progress It is advised to use an opto coupler to isolate nSCAN from XDAS if the trigger source is referenced to a different ground plane 5 2 the data channel The data channel is used to receive channel data from an XDAS system It is an 8 bit wide RS485 differential parallel data bus running through all signal processing modules in the system In a multi processor system the external connection between the XDAS system is made from the module with the highest address and not from the module with address 1 The modules
9. Local Address O Local Address 1 D6 D5 5 Data Bit 3 RS485 Data Bit 2 RS485 D1 01 Data Bit 1 RS485 Bos Data Bit 0 RS485 5 Pixel Clock RS485 11 Master Clock RS485 15 16 17 18 27 D4 37 38 XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 24 of 44 ex SENS TECH SENSOR TECHNOLOGIES appendix A continued Connectors J1 4way polarised male header MOLEX 2203 5045 J2 4way polarised RA male header MOLEX 2205 7045 mates with crimp housing MOLEX 5037 5043 and crimp MOLEX 870 1040 nSCAN Scan Initiation 6 6 V Power DC 6 Connectors J3 amp 44 50 way 2mm pitch IDC header for local bus SLS 050 H562 55 2 mates with 2mm pitch female IDC connector E TEC IDS 050 S200 95 P J3 connects to modules 1 to 12 and J4 connects modules 13 to 24 Both sub chains must be terminated detector head board connectors J1 4way polarised male header MOLEX 2203 5045 J2 4way polarised RA male header MOLEX 2205 7045 mates with crimp housing MOLEX 5037 5043 and crimp MOLEX 870 1040 GND Ground 1 02 o nSCAN Scan Initiation 2 6 V 6 V Power DC 6 V 6 V Power DC J1 and J2 are optional for a system with less than six detector head boards In a larger system it is acceptable to connect power only to the last DH board in every sub chain Connectors J3 50 way 2mm pitch male IDC header for local bus output J4 50
10. User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 8 of 44 cw SENS TECH SENSOR TECHNOLOGIES 3 0 software operation version 3 41 V1x V2 On entering the program the driver selection window is displayed first Select the correct option applicable to the type of data interface you are using and click OK The software will then display the Command Interpreter box and the Data Acquisition window The system is now ready to be used Data acquisition parameters are set up on the Command Interpreter and sent to XDAS using the Send button The button turns green after a successful XDAS configuration The system will commence data acquisition by pressing the Start button Detailed setting up instructions can be found in section 4 start up software XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 9 of 44 eX SENS TECH lt SENSOR TECHNOLOGIES 4 start up software XDAS Software is provided with the unit to allow immediate use of the product Custom user programs may be required and section 5 advanced user guide defines the necessary interface protocol for users to follow These instructions are written for Microsoft Windows XP The software provided with the unit can be operated by carrying out the following steps Before using the software the module s must be connected together and to the host PC as stated in section 3 installation A copy of the latest version of XDAS Demo
11. software must be installed Start the XDAS demonstration software by browsing to Start All Programs KDAS XDAS Demo V1x Select the applicable cable interface option in the driver selection window and click OK Hardware Communications enable the computer ta control the hardware you must attach it to one of pour computers serial ports Please select the port pou have attached the hardware to Data Port Card Standard EPP part an at 0378 C 2 Data acquisition card 3 5 USB Adaptor Ask this question every time the program starts Cancel EPP mode is not available on XDAS V2 4 1 command interpreter In the Command Interpreter set up the following default configuration Graph mode All Integration period AB 50 i e 500us Integration period CD 50 i e 500us Subsamples 2 Test mode unchecked nModules 1x1 Host speed SMHz Refresh rate 10ms XDAS V2 User Manual Issue 1 23 October 2007 Sens Tech Limited 2007 page 10 of 44 cw SENS TECH SENSOR TECHNOLOGIES 3 4 Command Interpreter co 12 3 Graph Mode C _ t ED Only he Commands Scan Control Start Stop Integration Period Subsamples 50 50 Sub Samples 2 Test mode nMadules Es m Speed 5 0 MHz Refresh 1 Log data MERE Upen
12. ueseippeempou PIP Buisseooid jeubig Buisseooud jeubis uiejs s qns 5 lt Issue 1 23 October 2007 9 Sens Tech Limited 2007 XDAS V2 User Manual page 30 of 44 SENS TECH SENSOR TECHNOLOGIES e appendix D continued 0582 local connections 5 55245 uonoeuuoo Buisseooud jeubis Ov uonoeuuoo peau 06 uonoeuuoo 06 199205 e WOOD uoneululJe av asn 1 21 sseuppe 3 eau eau 1043 eau 1 9 eau Buisseooid jeubig Duisseooid jeubig 928Heu casn waysAs qns 5 lt Issue 1 23 October 2007 Sens Tech Limited 2007 XDAS V2 User Manual page 31 of 44 SIU JO Z G 9se9 g Uonoeuuoo2Jejul y JO 55 spJeoq DuisseooJd jeus ay uo 2 yms pue Duisn ejqeuuuueJ60Jd s a E Un 2 Un SENSOR TECHNOLOGIES sisseyo uonoeuuoo2 Buisseooud
13. 44 cw SENS TECH SENSOR TECHNOLOGIES appendix continued USB2 module Part No XDAS USB2 XDAS interface Local USB2 adapter connects directly to the system control and data bus using a 40way 2 54mm pitch IDC connector Remote USB2 adapter connects to the 50way SCSI cable using the SCSI interface adapters XDAS DATA3 XDAS DATA4 or XDAS DATAG Host Interface Standard USB B type connector USB2 0 High Speed Mode Bulk transfer protocol for data acquisition Integrated control and data interface XDAS SDK library files available with example code XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 43 of 44 c SENS TECH QS SENSOR TECHNOLOGIES appendix continued PCI7300 Interface Adaptor Part No XDAS 485A TTL PCI7300A port CN1 GND Ground NC QNoetcomeded GND QJNoetcomeded 0 06 Databt6 D serial Port COM1 or 2 0 NC QNoetcomeded GND Ground NC JNoetcomeded 0 The following pins are connected together DTR and Data terminal ready and RS232 DSR Data set ready RTS and Request to send and RS232 CTS Clear to send XDAS V2 User Manual Issue 1 23 October 2007 Sens Tech Limited 2007 page 44 of 44
14. Data I O card or frame grabber These should be set up as follows USB2 type USB 2 0 data rate 2 5 20 Mbytes per second sustained mode Bulk transfer mode Buffer 130kBytes of cache buffer A standard USB B socket is used conforming to industry standards PCI data card type TTL parallel 8 bit data rate 2 5 20 Mbytes per second clocked using gated PCLK mode synchronous Signal types and connector definition are detailed in appendix A Details of the synchronous protocol are defined in appendix F XDAS V2 User Manual Issue 1 23 October 2007 Sens Tech Limited 2007 page 6 of 44 e SENS TECH SENSOR TECHNOLOGIES Frame Grabber type RS422 parallel 8 bit data rate 5 20 Mbytes per second clocked using PCLK mode synchronous Signal types and connector definition are detailed in appendix A Details of the synchronous protocol and line and frame synchronization are defined in appendix F 3 2 3 detector interface Where users are fitting their own detectors details of the detector connections for 16 and 32 channel detectors can be found in appendix G 3 2 4 ID address Ensure dip switches are set on each signal processing module based on the position of each module in the system chain For systems with only one processing board the address is always set to address 1 address address positions jumper or dip switch _ Note that each board is factory set to address 000 The user must set the address for each S
15. P board in the system before use Address 001 is Master 3 2 4 Board Header Set the dip switch H to ON position This enables the addition of two header bytes in the beginning of each data block identifying each detector board This setting is required for XDAS software and is optional for customer specific software 3 3 mounting see mechanical interface drawing appendix Four mounting holes suitable for M3 fasteners are provided on each detector module to allow the securing of the modules into the system The signal processing module has eight mounting holes suitable for M3 fasteners Each provides a ground connection for the board Care must be taken to ensure the modules are electrically screened from external interference They must also be screened from the X ray beam using appropriate techniques XDAS V2 User Manual Issue 1 23 October 2007 Sens Tech Limited 2007 page 7 of 44 cw SENS TECH SENSOR TECHNOLOGIES 3 4 software installation Insert the XDAS software CD into the computer s CD ROM drive If the setup program does not auto run carry out the following E Select Run from the Start menu In the command line box type d setup where is the letter of your CD ROM drive then click OK or press the Return 2 key Follow the on screen instructions The setup program creates a program icon in the Start menu Browse click the XDAS Demo V1x V2 icon to start the program XDAS V2
16. XDAS system whereas the data channel is used only to receive channel data from the XDAS system In this section hexadecimal numbers are indicated by the prefix Ox 5 1 the control channel The control channel is used to issue commands to the XDAS system It is an 5485 serial input and is bussed to all the modules in the system External connections to this bus are typically made using pins 8 SCTRL and 7 SCTRL of the system bus connector 5 1 1 command format All commands sent to the XDAS system follow a generic pattern described below Cmd Data All commands start with the byte OxCO This is followed by one or two byte s representing the command Cmd Where a command has parameters these are sent immediately after the Cmd byte 5 1 2 parameter format There are two types of parameters that can be sent with a command These are one byte and two byte parameters one byte parameters are sent simply as one byte two byte parameters however must be split into nibbles half bytes and sent as four separate bytes The most significant byte is sent first An example of this is given in section 5 1 4 XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 15 of 44 SENS TECH 5 1 3 command listing The commands for controlling an XDAS system are shown below Cmd byte parameter type description see section 5 1 2 startscan 0 start scan default OFF 0x02 set numbe
17. dules The address is set by means of DIP switches links on the board XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 21 of 44 med SENS TECH a SENSOR TECHNOLOGIES The SP boards share the multi drop system bus One of either the speed of the communications link or the ADC sample rate is normally the factor limiting data acquisition and read out rate for the system Sens Tech provides an XDAS V2 system builder tool for rapid system configuration or alternatively contact Sens Tech for support and advice XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 22 of 44 c SENS TECH SENSOR TECHNOLOGIES appendix A XDAS interface characteristics absolute maximum ratings DC characteristics 25 C supply 45 5 V to 6 5 V XDAS V2 not operate if the supply voltage drops below 5 25V or exceeds 49 5V There is limited over voltage protection for up to 13 0V XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 23 of 44 e SENS TECH ENSOR TECHNOLOGII appendix A continued signal processing board connector J5 40 way 2 54mm pitch male IDC header for system bus mates with 40way 2 54mm pitch female IDC connector signal type System Reset TTL 5V 2 Local address 2 RS485 LA2 NC Not connected NC Not connected 7 SCTRL 8 SCTRL System Control RS485 nSCAN ocan Enable TTL 5V Local Address Enable
18. ection factor This is carried out with no signal present gain takes a reading based on the current settings and calculates the gain correction factor for each channel to give 95 of full scale This should be carried out with maximum signal present on all channels The calibrate function allows 3 display options as follows offset correct this automatically deducts the stored offset from all readings before displaying and storing XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 12 of 44 cw SENS TECH SENSOR TECHNOLOGIES gain correct this automatically calibrates with the stored gain correction factor for each channel before displaying and storing set threshold this allows all readings below a set number 0 to 65536 to be set to zero to allow for threshold detection The calibration factors can be applied to either live or static data 4 1 11 save defaults This allows the current settings in the Command Interpreter to be set as the module power on defaults that are used on initial switch on 4 1 12 send This transmits the current parameters setup on the Command Interpreter screen to the hardware The Send box remains highlighted in Red if settings have been changed and not transmitted to XDAS XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 13 of 44 4 2 D aa Ac me SENS TECH AQ i SENSOR TECHNOLOGIES X ray data acquisition
19. factory defined signal into the odd and even inputs such that the odd numbered channels produce an output twice to that of even numbered channels This feature allows the testing of the system in the absence of an external signal 4 1 5 There is a choice of three different levels of sub samples 1 2 and 4 When Sub samples is activated multiple integration periods are taken dependent on the number of sub samples requested This allows the dynamic range of the module to be extended The user may perform further sub sampling in software 4 1 6 modules This input tells both the hardware and the software how many modules are connected in the system X Analogue x Digital 4 1 7 refresh rate This sets the software refresh rate for acquiring new data and can be varied from 1 ms to 100 s 4 1 8 data log When data logging is activated a separate menu is displayed requesting the file name number of data points required and whether to add calibration data and command interpreter settings The system then logs data based on these parameters and saves it in csv format 4 1 9 open last log file This allows the last set of data to be logged or to be reloaded for analysis or viewing 4 1 10 calibrate The calibration mode allows the user to acquire offset and gain calibration parameters These are as follows offset takes a reading based on the current settings and stores the figure for each channel as the offset corr
20. he board for detection of low and high energy X rays e The single energy version has 64 or 128 detector channels on one side of the board only XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 3 of 44 e SENS TECH SENSOR TECHNOLOGIES XDAS V2 is a series of products that consists of two basic building blocks A detector head DH board populated with custom radiation detectors It is possible to daisy chain up to12 DH boards A signal processing SP board that allows the user to control the operation of two chains of 12 DH boards each It is also possible to connect up to 7 SP boards together to form a single system output Further details can be found in the XDAS V2 datasheet available from the Sens Tech website www sens tech com XDAS units should be operated within a housing to provide electrical and radiation screening A test box can be supplied for system evaluation Connection cables for module interconnection and for connection to a PC can be supplied as required They include the communications link and power connections Signal terminators must be used for the local and system buses and must be fitted to the master signal processing board and the last detector board of every sub chain of an XDAS system These can be supplied to order standard software Standard XDAS software is supplied to permit basic operation and evaluation of the system The software enables the user to set signal
21. integration time and sub sample rate acquire and log data and perform offset and gain corrections on live data This is described in section 4 start up software user software applications Users may wish to write their own independent software application to provide system control and data acquisition This is described in section 5 advanced user guide A Software Development Kit SDK is available This provides the data acquisition source code module and system operation This is described in section 7 module system and operation XDAS V2 User Manual Issue 1 23 October 2007 Sens Tech Limited 2007 page 4 of 44 cw SENS TECH SENSOR TECHNOLOGIES 2 precautions 2 1 supply voltage Ensure the 6V supply voltage does not exceed 9V fall below 5 5V Exceeding these limits may result in unpredictable behaviour The power supply must not exceed the absolute maximum ratings which can cause permanent damage to the unit see appendix A 2 2 maintenance There are no user maintainable components The user must not attempt disassembly Boards must be returned to Sens Tech for service or repair 2 3 cleaning The Boards may be hand cleaned using conventional printed circuit board techniques Residues should not be left on the board that could affect the performance of the sensitive front end analogue electronics 2 4 environment The Boards must not be exposed to levels outside those specified in appendix B 2 5 radiat
22. ion The Boards use components of limited radiation hardness Additional shielding is required to protect the electronics from the X ray source 2 6 connections Always make connections to the Boards with the power supplies switched off 2 7 electrical screens The complete system of XDAS boards must reside in a fully shielded enclosure to protect from external noise and interference XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 5 of 44 cw SENS TECH SENSOR TECHNOLOGIES 3 installation The following instructions will enable users to operate the XDAS unit using the software provided Results can be taken immediately and the hardware setup can be checked for correct operation 3 1 system requirements Intel Pentium or faster CPU A USB2 0 capable PC is required for USB2 interface Microsoft Windows 98 2000 or XP A mouse or a tablet VGA or higher resolution monitor CD drive 6V low noise DC power supply 3 2 interfaces see appendix for details The diagrams of appendix D show three different types of connection USB2 PCI 7300A and a frame grabber card connection Please make connections as shown 3 2 1 control interface oet up the serial interface as follows type RS485 baud rate 9600 data bits 8 parity odd stop bits 1 USB2 connection does not require a separate serial interface 3 2 2 data interface One of three types of interface can be used USB2 PCI 7300A
23. last logfile Data shuffle Offset Gain Correctian Calibrate Offset Correct Gain Correct Setthreshold 5p Save Defaults to Board Now click on the Send button which should turn Green indicating successful XDAS setup 4 1 1 graph mode The axis of the graph is automatically scaled to correspond to the total number of channels depending on the number of modules in the system The following modes can be set via the Command Interpreter AB This selects only channels 1 to 64 to be displayed from each module CD This selects only channels 65 to 128 to be displayed from each module ALL This selects all channels to be displayed in a single line Dual This selects modes AB and CD to be displayed at the same time as different colours on the same x and y axis 4 1 2 scan control This starts or stops the data acquisition process based on the last set of settings sent from the Command Interpreter 4 1 3 integration period This allows the user to set either identical or different integration periods for channels 1 to 64 and 65 to 128 on each module The integration period and can be set between 1 and 50000 10 ys to 0 5 s in steps of 10us XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 11 of 44 m SENS TECH 4 1 4 test mode This mode must only be used with the integration time set to a maximum of 30us for 2pF mode and 150us for 10pF mode The test mode injects a
24. ns Tech Limited 2007 page 37 of 44 e SENS TECH ENSOR TECHNOLOGII appendix G continued 32 channel detector pin out XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 38 of 44 appendix G continued 0 05 0 8 mm pitch Csl 25 35 d scintillator array 0 45 dia pins F 36 off 211 0 2 25 0 Senators 20 3 2 0 x 45 2 6 0 05 0 5 3 E 0 45 dia scintillator array 0 8 mm pitch 25 35 CdWO 4 pins 36 off 10 2 191 25 0 scintillator 7 0 3 2 0 x 45 2 2 XDAS V2 User Manual Issue 1 23 October 2007 SENS TECH WS SENSOR TECHNOLOGIES 0 05 0 5 25 35 phosphor strip 0 8 mm pitch phosphor screen 0 45 dia pins F 36 251 E 0 3 1 6 1 9 0 5 0 8 mm pitch silicon 0 45 dia pins F 36 off 0 2 12 250 active area 0 3 1 6 wall Sens Tech Limited 2007 page 39 of 44 ec SENS TECH lt SEN S A appendix H outline drawings in mm XDAS SP2 01 signal processing board 122 0 40 8 crs 101 0 96 5 40 8 crs 8 holes 23 4 position as shown XDAS DH2 01 1 6mm pitch dual energy detector head 114 0 23 4 hole 12 7 4 positions 101 0 11 8 max cable connector fitted 7 2 3 9 4 0 4 2 E Header key To obtain height of detector above board add detector socket height to detector height exc pins XDAS V2 User Man
25. or use in any X ray linescan application Each board has 64 or 128 channels corresponding to a detector pitch of 2 5 1 6 0 8 or 0 4 mm Multiple boards can be connected in series and detectors can be butted end to end to provide a continuous array Data output is in 16 bit format The system can be interfaced to a PC via USB2 Local 5m maximum USB2 Remote PCI 7300A data I O card standard frame grabber card Control signals are transmitted to the board via the USB2 connection an 5485 serial interface which can be easily generated from a standard RS232 serial port using an RS232 to RS485 converter X rays are detected using a scintillator and a photodiode array Scintillators such as phosphor strip CsI TI or CDWO are offered to cover a wide energy range from 30 keV to 450 keV 1 2 applications These include security food inspection thickness measurement bone densitometry and non destructive testing 1 3 features 2 5 1 6 0 8 or 0 4 mm detector pitch range of scintillator types available up to 21504 128x24DHx7SP channels a system simultaneous data acquisition and read out dual energy option wide dynamic range 16 bit output high speed 0582 or parallel RS485 link to CPU 1 4 product hardware A standard XDAS board is supplied in 2 basic formats depending on whether a dual energy version or a single energy version is required e The dual energy version has 64 detector channels on each side of t
26. r of SP boards one byte sets the number of signal processing boards in the system 1107 default 2 0x03 set integration period AB two byte sets the integration period for block AB ch1 64 default 68 680us 0x04 set output data bus speed one byte sets the PCLK frequency where 022 5 1 5 2 10 3 20 2 default 2 10 2 0x05 set sub samples one byte sets the sub samples S where N is the parameter default 0 1 ss 0x06 test mode ON enable test mode default OFF 0x08 set integration period CD two byte sets the integration period for block CD 65 128 default 68 680us OxOA test mode OFF disable test mode default OFF OxOB set number of DH boards one byte sets the number of detector boards in the system 1 to 24 default 12 OxOD save boot defaults oaves current settings as power on defaults the integration time T is derived from the integration period P as follows T 10us xN 5 1 4 example commands Set number of sub samples in system to 4 4 2 XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 16 of 44 e SENS TECH SENSOR TECHNOLOGIES Set integration period to 2600 2600 0x0A28 on both AB and CD otart Scanning 5 1 5 scan trigger
27. rs and a multiplexer The microcircuit provides two serial analogue outputs corresponding to amplifier output voltages at the beginning and end of signal integration These are fed via a differential amplifier eliminating common mode noise to a 14 bit ADC The system can operate in continuous mode with one set of data being read out while the next set is being acquired In continuous operation the dead time is less than 1 us The maximum charge that can be collected per cycle depends on the choice of the storage capacitors one per channel which are internal to the microcircuit These can be set to 2 pF or 10 pF High linearity is maintained with a voltage swing of 1 5 V providing charge storage of 3 pC or 15 pC per cycle If higher dynamic range is required a facility for sub sampling and data summation is incorporated on board This is the image data store see module block diagram appendix C Up to 4 sub samples can be acquired and stored in the image data store which is a 16 bit device When data is ready for transmission the 16 bits are transmitted via the chosen interface to the host CPU Operation is controlled by a gate array FPGA which provides the central intelligence for the board and the timing and control signals for system operation The gate array is based on fused link technology providing a high level of radiation hardness User settings to control integration times sub sampling and refresh rate together with informa
28. send their data in order of address starting at address 1 XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 17 of 44 c SENS TECH KS SENSOR TECHNOLOGIES 5 2 1 Dip switches affecting the data transfer protocol The data transfer protocol is set up using dip switches B C F and H Set Not set readout reversed standard output factory setting Set Not set standard output readout reversed factory setting Set Not set PCLK ungated PCLK gated factory setting Set Not set header prefix header prefix enabled disabled factory setting DIP switches B and C allow to user to set XDAS to one of all the possible combinations of the readout direction 5 2 2 data format Data bytes are presented on the data output connector The data from each module is organised as shown below The channels are output in order from 1 to 128 Channel data is two bytes wide If switch H is set a two byte header is added to the output of each module The header contains the address of the signal processing board m in the first byte and the module number n in the second For example data output for the first DH board connected to first SP board with switch H two header bytes and switch E digital test pattern enable section 5 3 are set to ON is given below 0 0 0 0 low byte high byte low byte high byte 0x01 0x01 0x00 0x00 OxFC 0x01 The test mode changes when the readout order is changed
29. tion on system configuration are transmitted via an RS485 interface and can be stored in non volatile RAM such that switch on the system is initiated in the last mode saved The 5485 is compatible with the RS232 serial port on standard PCs using the interface converter supplied as part of the cable set The data output bus is a differential RS485 link multi drop RS422 capable of transmitting at 2 5 5 10 20 MB s Interface to a PC is USB2 PCI 7300A data card or frame grabber card The same configuration of XDAS board is used for each mode but a different cable set is required to connect to the PC If USB2 mode selected no additional board is required for a PC USB2 cable is capable of providing a single link for both data and control buses 7 2 XDAS system operation Up to 12 detector boards can be daisy chained to form a single detector system Each SP board can process two chains of 12 DH boards each It is further possible to daisy chain up to 7 SP boards The first SP board in the system acts as the master board ensuring that all boards in the system are synchronised The master board transmits the image data from all boards to the host CPU via the RS485 link see the system block diagram appendix C It also transmits all control settings from the host to the slave boards To enable control settings to be made each module is set up with a unique address from 1 to 7 Address 0 is reserved as a broadcast address for all mo
30. tted only if enabled using DIP switch H The first byte is the SP board ID and the second byte is the DH board ID XDAS V2 User Manual Issue 1 23 October 2007 Sens Tech Limited 2007 page 34 of 44 SENS TECH SENSOR TECHNOLOGIES x appendix F continued XDAS V2 User Manual Issue 1 23 October 2007 Sens Tech Limited 2007 page 35 of 44 cw SENS TECH SENSOR TECHNOLOGIES appendix G 16 channel detector pin out x 48 CH1 Ns CH2 2 4 3 CH6 4 5 CH1 6 0 CH1 2 CH14 8 cH16 9 15 CH7 44 CH9 13 42 cH13 11 5 E XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 36 of 44 appendix G continued 1 6 mm pitch Csl 0 3 0 5 28 3 5 scintillator array pins 18 off 30 3 1 6 2 0 x 45 4 2 0 0 3 0 5 25 4 3 5 scintillator array d 0 45 dia a 00 till 20 0 scintillator p 1 6 mm pitch 0 45 dia pins 18 off 10 2 ni 3 0 20 0 scintillator 2 0x M 0 3 6 5 1 2 XDAS V2 User Manual Issue 1 23 October 2007 c9 SENS TECH lt SENSOR TECHNOLOGIES 1 6 mm pitch 0 3 0 5 phosphor screen 25 4 GADOX strip 0 45 dia pins I 18 off 10 2 3 0 20 0 phosphor strip 20 3 6 2 0 x 45 ope 0 0 1 6 mm pitch silicon 0 3 0 5 silicon 0 45 dia 18 off T 2 0 20 0 active ___ area 9 Se
31. ual Issue 1 23 October 2007 Sens Tech Limited 2007 page 40 of 44 c SENS TECH lt SENSOR TECHNOLOGIES appendix H continued XDAS DH2 10 1 6mm pitch single energy detector head XDAS DH2 20 0 8mm pitch single energy detector head 114 0 23 4 hole 12 7 4 positions 101 0 11 8 max cable connector fitted 7 2 1 6 42 _ XDAS DH2 40 2 5 pitch dual energy detector head Ar 4 2 T 11 8 max cable connector fitted 7 2 max 3 9 110 0 4 0 Header key 4 9 optional 10 9 RA header i 23 4 four positions 1 6 XDAS V2 User Manual Issue 1 23 October 2007 Sens Tech Limited 2007 page 41 of 44 x SENS TECH Ss SENSOR TECHNOLOGIES appendix peripheral connections 50 way SCSI interface adapters XDAS DATA3 XDAS DATA4 or XDAS DATA6 OOOO Nocomedon _ NO Nocomedon o Ne Nocomedon D _ FC No RES Resevedforsysemuse _ Nocmmedon D _ RES Resevedforsysemuse NO Do D Daabt0 RS488 NC Notcomeded Do INC Notconnected OoOo NO Nocomedon D NC Nocomedon _ NC Nocomedon Do NC Noconneston D _ Daabte RS488 XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 42 of
32. using switch B and switch C corresponding to data from different RAM locations The header bytes remain the same XDAS V2 User Manual Issue 1 23 October 2007 9 Sens Tech Limited 2007 page 18 of 44 c SENS TECH QS SENSOR TECHNOLOGIES 5 2 2 1 synchronous mode Data is output synchronised to PCLK running at 2 5 5 10 20 MHZ This allow up to 20Mbytes s data output Both USB2 and PCI7300 interfaces are able to meet these requirements PCLK PCLK Data must be read from the data pins on the NEGATIVE edge of PCLK 5 3 additional configuration jumpers Not set factory setting Set Not set test pattern ON test pattern OFF factory setting Not set 10 pF factory setting XDAS V2 User Manual Issue 1 23 October 2007 Sens Tech Limited 2007 page 19 of 44 6 6 1 6 2 6 3 6 4 6 5 6 6 6 7 6 8 cw SENS TECH SENSOR TECHNOLOGIES troubleshooting No response Check all the connections have been made correctly including data and power cables and termination sockets Check the 6 V power supply is on and correctly set Note that the system will not operate if voltage at any module drops below 5 5 Check that module address has been setup correctly using DIP switches Check that the unit has been set up properly on the software command window Count overflow or very high count rates Check module optical connection is light tight Check the front end gain setting on DIP switch G

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