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931003D digiBASE User Manual uncompressed 100% for

1. C00002089 C00003090 C00004091 C00005092 SHOW_SNUM First shaping time selected 0 75 us Second shaping time selected 1 us Third shaping time selected 1 25 us Fourth shaping time selected 1 5 us Fifth shaping time selected 1 75 us Sixth shaping time selected 2 us Responds with a F record indicating the serial number of the digiBASE Response F100 SHOW_STATUS Serial number 100 Returns system status information in the following format SMI lttttttttttaaaaahhhhhccc lt CR gt where 1111111111 represents the live time as returned by the SHOW_LIVE command tttttttttt represents the true time for the current device as returned by the SHOW_TRUE command aaaaa represents the active device mask as returned by the SHOW_ACTIVE_DEVICES command and hhhhh represents the hardware status which is an ASCII representation of a 16 bit decimal number with the following bit definitions Bit 0 LSB Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bits 6 7 40 Bias supply polarity 0 positive 1 negative Always 1 in digiBASE Bias supply overload 0 overload 1 normal Always 1 in digiBASE High voltage enabled if actual HV gt 10 V 0 disabled 1 enabled Unused Unused Unused Unused 931003D 0914 4 FIRMWARE COMMANDS AND RESPONSES Bit 8 Unused Bit 9 Unused Bits 10B14 Unused Bit 15 MSB Reserved SHOW_TIME_SAMP Reports the number of microseconds per channel in InSight mode See SET_MODE_S
2. Live time preset reported as disabled G0000000001076 lt CR gt Live time preset reported as 1 tick G4294967295132 lt CR gt Live time preset reported as 4294967295 ticks SHOW_LLD Shows the lower level discriminator setting See also SET_LLD 37 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 Responses C00050092 The LLD is 50 SHOW_MODE Reports mode of operation List PHA or Sample InSight Response FPHA lt CR gt PHA mode FLIS lt CR gt List mode FSAM lt CR gt Sample InSight mode SHOW_MONL LABEL num Returns with an ASCU string label designation for the monitor num SHOW_MONI_MAX Returns with the number of monitors available for viewing SHOW_MONI_VALUE num Returns with an ASCII representation of the value for the monitor SHOW_Nal Indicates whether MCB is in Nal Mode Responses are true and false Responses IT lt CR gt digiBASE is always in Nal mode SHOW_NEXT Used in conjunction with the SHOW_ROI command SHOW_NEXT reports the next continuous group of channels that have the ROI flag set The response is of the form Dsssssnnnnnccc lt CR gt where sssss represents an integer number that is the number of the first channel of the next group of channels that all have their ROI bit set and nnnnn represents an integer number that is the number of channels in the group If no more channels have their ROI bit set SHOW_NEXT
3. click the Start button to begin acquisition The program will start 46 931003D 0914 APPENDIX A LIST MODE collecting and storing list data in the file TESTDATA BIN Acquisition will stop when you click Stop The right hand column is a status screen that shows statistics about the acquisition in progress ig digiBASE List Mode Example Program ol x Start Stop Figure 17 List Mode Example Program A 3 3 Format of Stored Data The format of the data in TESTDATA BIN is identical to the format discussed in Section A 1 with one exception When the computer asks the digiBASE for data the interface software returns a buffer in which the first word is the number of bytes that were available The word is stored in the file along with the data An example file is show below 000000 10H 10000009H 7FEQOOFFH 08000200H 00000008H 40000300H 00000020H 16 bytes 4 words were available 9 us after starting an event that was 80H in amplitude occurred 255 us s after starting an event that was 3FFH in amplitude occurred 512 us after starting an event that was 40H in amplitude occurred 8 bytes were available in next request 768 us after starting an event that was 200H in amplitude occurred 32 bytes were available in next request 47 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 When multiple digiBASEs are selected each successive packet rotates
4. the data file is opened and then each MCB is started uConn21 i 1 Comm START After starting the While Not bStop loop is entered This loop is executed until the Stop button is clicked In the While loop data is requested from each selected MCB with the GetRawData 0 16384 method This function causes the digiBASE to transmit up to 16383 conversions The first word in the returned buffer reports the number of conversions that were actually available to be returned The REDIM command resizes the data array to the size that was returned by the GetRawData method This prevents extraneous data from being written to the disk file The data is written to the disk file with the Put command The DoEvents command gives time for the Stop button to be clicked The remaining portion of the While loop prints out status information every 3 seconds Once Stop is clicked the bStop flag gets set and the program exits from the while loop The remaining portion of the subroutine prints out some statistics about the average count rate and the file is closed A 3 4 4 STOP_CLICK Private Sub cmdStop_Click bStop True End Sub When the Stop button is clicked the bStop flag is simply set The START_CLICK function will notice the flag and stop acquisition 51 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 A 3 4 5 PrepareMCB Sub PrepareMCB Index uConn21 Inde
5. Close 132 1 ESINGLEY NEW 5 Re Cancel Description digiBASE Bicron W 908 Figure 6 Change MCB Number or Description Make the desired changes and click Close Any changes you have made to an ID number or description will then be written back to the corresponding MCB NOTE FOR MULTIPLE USERS ON A NETWORK There are two ways to reduce the chance that other users will renumber your MCBs e Add the I flag to their MCB Configuration command line as described in the CONNECTIONS Driver Update Kit instructions This will allow you to assign whatever ID Numbers you wish regardless of the numbers assigned by other users on your network Ideally everyone using ORTEC instruments on your network should make this change To prevent others from renumbering your MCBs or performing any other actions except read only viewing password lock your MCBs with the MAESTRO Lock Unlock Detector command If you lock a detector that will be controlled by a JOB stream remember to include the proper password unlock commands in your JOB file see the MAESTRO user manual If a modified description has already been applied to a particular instrument you can restore the default description by deleting the entry in the Description field and re running MCB Config uration After MCB Configuration runs the default description will be displayed 2 3 5 Attaching More Than One digiBASE to the Computer Once the drivers have been installed
6. Command Format The commands consist of a command header that may be followed by numeric parameter values The header consists of a verb a verb and noun or a verb noun and modifier each separated by underscores The first four letters of a word in a command will always be enough to uniquely identify that word when composing commands for the instrument For example the command ENABLE_GAIN_STABILIZATION can be abbreviated to ENAB_GAIN_STAB Numeric parameters are unsigned integer numbers that follow the command header separated by one or more spaces Specific commands require multiple parameters separated by commas that specify numeric quantities related to the operation of the MCB such as live time or conversion gain The command SET_WINDOW 0 8192 has two parameters O and 8192 which set the window of interest to start at channel O and continue for 8192 channels Some parameters are optional and are delimited by square brackets in the command prototype line to distinguish them from mandatory parameters e g SET_WINDOW start length Com mands with optional parameters can be sent to the MCB without the optional parameters in which case the instrument behavior will be explained in the command description 4 2 Error Codes On each completion of the command the MCB returns a macro error code and micro error code The macro error code represents the general class of error with 0 meaning no error and the micro error code represents the s
7. GetRawData 0 16384 ReDim Preserve IData IData 0 4 As Long Put 1 IData TotalCounts i 1 TotalCounts i 1 IData 0 4 End If Next i DoEvents If Timer oldtime gt 3 Then For i 1 To IstMCBs ListCount If IstMCBs Selected i 1 Then rtbStatus SelText MCB amp i amp Total Conversions amp TotalCounts i 1 Chr 10 End If Next oldtime Timer End If If oldtime gt Timer Then oldtime Timer Wend StopTime Time rtbStatus SelText Started amp StartTime rtbStatus SelText Finished amp StopTime Dim Elapsed Elapsed StopTime StartTime 3600 24 rtbStatus SelText Elapsed amp Format Elapsed Os Chr 10 For i 1 To IstMCBs ListCount If IstMCBs Selected i 1 Then rtbStatus SelText MCB amp i amp Got TotalCounts i 1 amp Conversions 8 Format TotalCounts i 1 Elapsed 0 0 amp cps Chr 10 RestoreMCB i 1 End If Next i Close 1 End Sub 50 931003D 0914 APPENDIX A LIST MODE The function begins by clearing out the status box on the form It then enters a for next loop that creates a connection control for each digiBASE that has been checkmarked in the list box Each digiBASE is interrogated and its version and serial number are displayed in the status box rtbStatus In addition each digiBASE is prepared for acquisition by calling the PrepareMCB function After the for next loop
8. Reed ee See com gee Weed Ou Gta doe ee wee os 14 29 9 TAT TY OCA ads 15 De TiO AVOUT 12 aie A ARO ale ned aR ee A EA A 15 IS OVAL Sy eN E ade Oe ites a 16 E S el Sexe aE etal woe 4 EN ee S Goa Aon inked ts 16 2 0 TrOUDIESHOOUN Ea ASS IST banister 17 3 SPECIFICATION S qt O y eb ee Seat tds 19 Solis POTIORMANCE y RA A AAA AA its 19 Di Weel de A O O CARO RASO 20 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 amp 8 PPLy p 8 3 1 2 Special Performance Features seta EDEN an wee baer meee enk as 20 3 2 Computer Controls and Indicators 4425 04453 eenen hs ds Roe 21 3 3 Electrical Mechanical and Environmental 0 0 0 0 ccc eee 21 34 Feat tre Mask Bits dd A ARDEA UE EERE Ee HR EH 22 4 FIRMWARE COMMANDS AND RESPONSES 0 0 0 0 000 00 cee eens 25 4 1 Command Format a nace dai EI EOS Sy BAER LR 25 42 ETO COU A A ON 25 4 2 1 Dollar Response Records desarro eae ed GRE COS 26 4 2 2 MCB Commands ISA AA A 27 APPENDIX A LISFMODE 00 of ets A AAA OSS che es 45 Al ASE MOS DA a adds 45 a A A E ROO 46 A 3 Sample Data Collection Application 0 0 ce ccc eee o 46 A 3 1 ORTEC Connections Programmer s Toolkit A11 BW 46 A 3 2 Operation of the List Mode Data Collection Program 46 A 3 3 Format of Stored Data ita sia id di is 47 Pu Se Source A A Oe Mee TS 48 e541 Declarations EA webu teed R
9. errors below C00001088 lt CR gt Maximum count was found in channel 1 C01023093 lt CR gt Maximum count was found in channel 1023 SHOW_RADIX This command is for compatibility with other ORTEC MCBs It always reports that the number base radix for the WRITE command is binary Responses FBIN lt CR gt Number base set to binary radix SHOW_ROI Used in conjunction with the SHOW_NEXT command SHOW_ROI reports the first continuous group of channels that have the ROI flag set The response is of the form Dsssssnnnnnccc lt CR gt where sssss represents an integer number that is the number of the first channel of the first group of channels that all have their ROI bit set and nnnnn represents an integer number that is the number of channels in the group The SHOW_NEXT command is used to report the next group of channels that all have their ROI bit set Responses D0100000050078 lt CR gt First ROI group starts at channel 1000 and is 50 channels long D0000000000072 lt CR gt No ROI groups to report 39 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 SHOW_ROI_SAMPLE Displays the ROI Sample setting See also SET_ROI_SAMPLE Response C00001088 SHOW_SEG Returns the current segment number Always 1 for the digiBASE SHOW_SHAP Displays the shaping time as an index into the list returned by LIST_SHAP Responses C00000087 C00001088
10. locked Properties for digiBASE Bicron V 908 About Status Presets Amplifier Ampifier2 ADC Stabilizer High Voltage Target O Volts Of Actual 0 Volts Figure 13 digiBASE High Voltage Tab Properties for digiBASE Bicron V 908 Amplifier Ampifier2 ADC Stabilizer High Voltage About Status Presets digiBASE Bicron V 908 Sample Acquisition Start Time Access 15 18 51 Tuesday August 19 2014 Read Write Firmware Revision Serial Number Acquisition Mode DBAS 003 0021810 PHA Figure 14 digiBASE About Tab 15 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 2 5 7 Status Figure 15 shows the Status tab The Enable Counter functions when the Gate function on the ADC tab is set to Event and the digiBASE is actively acquiring data in a spectrum Under these conditions the Enable Counter accrues the number of events at the ENABLE INPUT since the Start command was issued To clear this counter click on the Clear Spectrum button on the MAESTRO toolbar or issue Acquire Clear 2 5 8 Presets Figure 16 shows the Presets tab The presets can only be set on an MCB that is not acquiring data during acquisition the preset field backgrounds are gray indicating that they are inactive You can use either or both presets at one time To disable a preset enter a value of zero If you disable both pres
11. memory If the ENABLE INPUT is high normal acquisition occurs e If set to Event rising edges are counted by a 32 bit event counter The contents of the counter can be monitored on the Status tab under Acquire MCB Properties in MAESTRO Input impedance is 5 kQ to 3 3V protected to 10 V USB Full speed 12M bps bus powered USB 1 1 interface 3 1 2 Special Performance Features List Mode Acquisition If you need the ultimate in fine time resolution especially important for Homeland Security applications the digiBASE features List Mode operation in which each valid input signal is converted to a digital value which is transmitted to the computer along with the time the event occurred Time is measured to the nearest microsecond Each event causes a 32 bit word to be transmitted to the computer The bits of the word are decoded as follows Bit Description 31 msb TimeStampFlag 0 Normal Data 1 Time Stamp 30 21 Amplitude of the event 20 0 Time event arrived in units of microseconds In addition every second a time stamp word is transmitted This time stamp word is used to track rollovers in the 21 bit time stamp in the normal data word Bit Description 31 msb TimeStampFlag 0 Normal Data 1 Time Stamp 30 0 Current time in microseconds 20 931003D 0914 3 SPECIFICATIONS Number of List Mode Units per Computer When multiple units are used in a list mode application the limited bandwidth of the US
12. shipper Instruments not in warranty should follow the same procedure and AMT will provide a quotation Damage in Transit Shipments should be examined immediately upon receipt for evidence of external or concealed damage The carrier making delivery should be notified immediately of any such damage since the carrier is normally liable for damage in shipment Packing materials waybills and other such documentation should be preserved in order to establish claims After such notification to the carrier please notify AMT of the circumstances so that assistance can be provided in making damage claims and in providing replacement equipment if necessary Copyright 2014 Advanced Measurement Technology Inc All rights reserved ORTEC is a registered trademark of Advanced Measurement Technology Inc All other trademarks used herein are the property of their respective owners NOTICE OF PROPRIETARY PROPERTY This document and the information contained in it are the proprietary property of AMETEK Inc It may not be copied or used in any manner nor may any of the information in or upon it be used for any purpose without the express written consent of an authorized agent of AMETEK Inc TABLE OF CONTENTS WARD a A A A 11 Safety Instructions and Symbols culata e o a Wi ben A A v Cleaning INstr ctionS AS ESA SA EA EE OEA A v ly INTRODUCTION ato umber age as pes 1 1 1 Host Computer and Software Requirements oooooocococconconco eee eee 2 1
13. 00 125 150 175 200 LIST_TRIG_SAMPLE Lists the various trigger sources in InSight mode Response TRIG_SAMP Enable PeakDet LLD Random LIST_ZERO_ADJUST Displays the range of zero stabilizer adjustment that can be returned with the SHOW_ZERO_ADJUST command A value of 100 corresponds to the internal value of 100 and 100 corresponds to 100 Response ZERO_ADJU 100 100 100 100 SAMPLE Causes a waveform to be captured in InSight mode Response 000128080 No waveform was available 000000069 New waveform was successfully captured SET_DEVICE Included for backward compatibility This command executes SET_WINDOW resetting the window of interest to the maximum number of channels 30 931003D 0914 4 FIRMWARE COMMANDS AND RESPONSES SET_GAIN_CHANNEL chan Sets the center channel for the stabilizer gain peak If a gain channel is chosen such that the beginning channel or ending channel would be below channel O or above the maximum channel as determined by the conversion gain the gain peak width is reduced until the peak fits the device boundaries SET_GAIN_CONV value Sets the conversion gain to the specified value Use LIST_GAIN_CONV to determine legal values SET_GAIN_FINE value Sets the fine gain to value Value is a floating point value from 0 4 to 1 2 See also SHOW_GAIN_FINE SET_GAIN_WIDTH chans Sets the width in channels for the stabilizer gain peak The gain width must be chosen such that the beginning channel i
14. 2 About This MAA a A SAO Gee Ment ad Poem ae cay 2 2 RE ING STARTED ae yaa Pedra 3 ZA Ne GIGI ASE 20 A ASAS A A ASE 3 2 2 Setting the Coarse Gain Jumper did Da 3 2 3 Software and Hardware Installation y lt a ricino ser dad GEO Te Beene eG 5 2 3 1 Step 1 Install the CONNECTIONS Driver Update Kit o o oo oo 5 Zo Step 2 Install MAESTRO 0 20 A Oke es 5 2 3 3 Step 3 Connect the digiBASE to the Computer oo oooccooocoomoooo o 6 2 3 4 Step 4 Run the MCB Configuration Program to Establish Communication With YOUR IVI CIB Ge tri uct oe ch hig hath e di O a de ot Sil 6 2 3 4 1 Configuring a New Instrument 20 00 e eee eee ee 7 2 3 4 2 Customizing ID Numbers and Descriptions 7 2 3 5 Attaching More Than One digiBASE to the Computer 8 2 3 6 Connecting to and Disconnecting from the Computer 8 24 Additonal NOES rre cee A ASA IA A DAI RE AR ONES 9 2 4 1 Attaching More Than One digiBASE to the Computer 9 2 4 2 Connecting to and Disconnecting from the Computer 9 2 5 digiBASE MCB Properties in MAESTRO 0 00 0 eee eee eee ene 9 23l AM e NE te tes Ghee Serta tee ale il bia ET 10 29 IMP MCE Sie 8 ots hea va Wee ede ye ok Re va ke eh wk he eM eat d eal ead 10 Mo Mol Mode 46 5ca nan cing Bent sok ie aa en Ge Ee CEES hee Gia 11 Di Due ADC AS A A EA e AED aks Die ey 13 A ADLER A Mee taaie
15. 255 units from a single computer their use is however subject to some limitations as discussed in Sec tion A 2 In addition we offer a 5 m USB Active Extension Cable Part No USBEXT A max imum of five cables can be daisychained per instrument allowing you to connect your digiBASE to a computer 25 m away digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 1 1 Host Computer and Software Requirements The digiBASE is completely computer controlled and can be operated with any suitable version of ORTEC spectroscopy software including MAESTRO which is supplied with the instrument The digiBASE connects via a USB port and can be used on any computer running under Micro soft Windows 8 7 or XP Professional SP3 1 2 About This Manual This manual describes the digiBASE tells how to connect it in a complete spectroscopy system gives instructions on configuring the hardware settings such as high voltage presets and gain and supplies the hardware commands and responses Complete details on using the control soft ware are in the MAESTRO Software User s Manual 2 GETTING STARTED 2 1 The digiBASE Figure 1 shows the digiBASE connectors on both the top and bottom panels including the pin assignments for the TRW 3B14 socket base which accepts JEDEC B 14 38 PMT pin bases The digiBASE is powered by the USB bus so there is no separate power supply or cord For more infor
16. AMP SHOW_TRUE Reports the contents of the true time counter in units of 20 ms 50 ticks s See also CLEAR_COUNTERS and SET_TRUE Responses G0000000000075 lt CR gt True time reported as O ticks G0000000001076 lt CR gt True time reported as 1 tick 20 ms G4294967295132 lt CR gt True time reported as 4294967293 ticks over 23000 days SHOW_TRIG_SAMPLE Reports the trigger source in InSight mode Responses FOENABLE ENABLE INPUT is source F1PKD Peak detect is source F2LLD Lower level discriminator is source F3RANDOM Triggers randomly SHOW_TRUE Reports the current true time in units of 20 ms 50 ticks s Responses G0000000001076 lt CR gt True time reported as 1 tick G4294967295132 lt CR gt True time reported as 4294967295 ticks SHOW_TRUE_PRESET Reports the current true time preset in units of 20 ms 50 ticks s See also CLEAR_PRESETS and SET_TRUE_PRESET Responses G0000000000075 lt CR gt True time preset reported as disabled G0000000001076 lt CR gt True time preset reported as 1 tick G4294967295132 lt CR gt True time preset reported as 4294967295 ticks 41 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 SHOW_ULD Returns the value of the ULD in channels as a C record Example Responses C01023093 The ULD is 1023 the maximum setting for the digiB ASE SHOW_VERSION Reports the digiBASE firmware version number in t
17. B bus sets a practical limit on the number of units that can send data to a single computer The total data rate of all units should be kept less than 200 kcps The following chart gives typical maximum pulse rates for various numbers of units This is discussed in detail in Section A 2 Number of digiBASEs Maximum Pulse Rate typ 4 50 kcps 5 40 kcps 6 33 kcps 8 25 kcps Histogram Mode Acquisition Data is histogrammed inside the digiBASE Data channels are 31 bits Most significant bit is ROI bit 3 2 Computer Controls and Indicators All controls and readouts are implemented in the MAESTRO MCA Emulation Software included with the digiB ASE For more complex applications the digiBASE is completely compatible with our ScintiVision spectroscopy application software 3 3 Electrical Mechanical and Environmental Dimensions 2 48 in D x 3 43 in L 63 mm x 87 mm Weight 10 1 oz 287 g Power Requirement lt 500 mA from USB connection Ambient Operating Environment 10 to 50 C at 0 80 non condensing humidity NOTE The digiBASE will operate at 10 C however at power on it should be at least 0 C for proper startup CE Conforms to CE standards for radiated and conducted emissions susceptibility and low voltage power directives 21 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 3 4 Feature Mask Bits The following table describes the feature bits from the SHO
18. LIZATION 42 931003D 0914 4 FIRMWARE COMMANDS AND RESPONSES Responses IT lt CR gt Zero stabilization is currently enabled IF lt CR gt Zero stabilization is currently disabled SHOW_ZERO_WIDTH Reports the current width for the stabilizer zero peak See also SET_ZERO_WIDTH SET_ZERO_CHANNEL and SHOW_ZERO_CHANNEL Responses C00001088 lt CR gt Zero width has not been set C00003089 lt CR gt Zero width is 3 channels lowest possible width C00256100 lt CR gt Zero width is 256 channels START seg mask Starts data acquisition The optional segment mask is provided for compatibility with other MCBs and may be any value from O to 65535 but is ignored by the digiBASE STOP seg mask Stops the data acquisition The optional segment mask is provided for compatibility with other MCBs and may be any value from 0 to 65535 but is ignored by the digiBASE 43 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 Intentionally blank 44 APPENDIX A LIST MODE The digiBASE is equipped with List Mode which streams spectroscopy data directly to the computer event by event without the data dead periods associated with the acquire store clear restart cycle of standard spectrum acquisition MAESTRO v7 supports our List Mode MCBs with menu and toolbar commands as well as commands in our automated JOB streams See the MAESTRO user manual for detailed inform
19. N command See also SHOW_ZERO_ADJUSTMENT SET_ZERO_CHANNEL chan Sets the center channel for the stabilizer zero peak If a zero channel is chosen such that the beginning channel or ending channel would be below channel 0 or above the maximum channel as determined by the conversion gain the zero peak width is reduced until the peak fits the device boundaries 33 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 SET_ZERO_WIDTH chans Sets the width in channels for the stabilizer zero peak The width must be chosen such that the beginning channel is no lower than channel 0 and the ending channel is no higher than the maximum channel as determined by the conversion gain The zero channel and width must be set before gain stabilization can be enabled The absolute minimum width for the peak is 3 channels See also SHOW_ZERO_WIDTH SET_ZERO_CHANNEL and SHOW_ZERO_CHANNEL SHOW_ACTIVE Returns a 1 if the digiBASE is active 1 e acquiring spectral data or 0 if it is not active Responses C00000087 lt CR gt Not active C00001088 lt CR gt Active SHOW_CONFIGURATION Returns a record that indicates the hardware configuration of the MCB The record contains information about the number of segments in an MCB device always 1 for the digiBASE and the current conversion gain for each segment The record is organized as follows J0102400001aaaaa00000 65 zeros here for total of 75 zero
20. ORTEC digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer for Nal Spectrometry and Counting User s Manual Printed in U S A ORTEC Part No 931003 0914 Manual Revision D Advanced Measurement Technology Inc AMT WARRANTY AMT warrants that the items will be delivered free from defects in material or workmanship AMT makes no other warranties express or implied and specifically NO WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE AMT s exclusive liability is limited to repairing or replacing at AMT s option items found by AMT to be defective in workmanship or materials within one year from the date of delivery AMT s liability on any claim of any kind including negligence loss or damages arising out of connected with or from the performance or breach thereof or from the manufacture sale delivery resale repair or use of any item or services covered by this agreement or purchase order shall in no case exceed the price allocable to the item or service furnished or any part thereof that gives rise to the claim In the event AMT fails to manufacture or deliver items called for in this agreement or purchase order AMT s exclusive liability and buyer s exclusive remedy shall be release of the buyer from the obligation to pay the purchase price In no event shall AMT be liable for special or consequential damages Quality Control Before being approved for
21. ORTEC 8 20 12 AM Tue 2 11 2003 The display can be switched from the digiBASE to another MCB or the buffer In this case the other MCB will be shown in the mode selected for it The buffer will always be shown in PHA mode The display will return to the InSight mode when you return to the first digiBASE If you exit the program with the digiBASE in InSight mode it will be in InSight mode on the next startup The display can include a Mark to indicate one of the other signals shown in Fig 10 The Mark is a solid color region displayed similarly to that of an ROI in the spectrum The digiBASE supports only PosBLDisc and Peak 12 931003D 0914 2 GETTING STARTED Mark Types For the Mark go to the Display Preferences submenu and select noes either Points or Fill All This choice does not change the histogram appearance in PHA mode PileUpReject NegBLDisc BaseLineR None No channels are marked in the display PosBLDisc Busy PosBLDisc This shows when the positive baseline discriminator has been triggered The signal is used internally in Figure 10 Mark the live time correction circuit Display Selection Peak This is the peak detect pulse It indicates when the peak detect circuit has detected a valid pulse The Mark occurs about 0 5 us after the pulse maximum on the display On the lower right of the InSight display are the shaping parameter controls Except for the LLD control accessed by clicking on the ot
22. OoOo O0OOoB CO CO Rm eS OS a OOS DE sr E OO co o DN OS Se E O Bit 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 3 SPECIFICATIONS Meaning Software selectable DPM address SET_DPM_ADDR Multiple devices e g 919 Software selectable ADC gate mode SET_GATE Software downloadable firmware Time histogramming functions available e g 9308 Software selectable lower level discriminator Software selectable upper level discriminator MCS mode SCA input available MCS mode positive TTL input available MCS mode fast negative NIM input available MCS mode discriminator input available Software switchable MCS mode discriminator edge Software programmable MCS mode discriminator level Software programmable SCA upper and lower thresholds Software selectable MCS mode input sources Uncertainty statistical preset SET_UNCERT_PRES Features vary by input SHOW_FEATURES depends on device segment multi input MCBs only Software selectable HV shutdown mode SET SHOW VERI_SHUT Software selectable shaping time constants SET_SHAP Explorable shaping time constants SHOW_CONFIG_SHAP Advanced shaping time SET_SHAP_RISE SET_SHAPE_FLAT etc Software selectable BLR ENA DIS SHO_BLR_AUTO SET SHO VERI_BLR SHOW_STATUS command supported returns M record Overflow preset ENA DIS SHO_OVER_PRES Software enabled MicroNOMAD style audio clic
23. SE Bicron V 908 This tab contains the controls for About Status Presets Gain and Shaping Time A a Gain 1 20 Shaping Time Set the amplifier coarse gain by setting the gain jumper described in Section 2 2 to 1x 3x or 9x be hs sure to note the setting it is not Fine 1 2000 reflected in this dialog Then ad just the Fine gain with the hori zontal slider bar or the edit box in the range of 0 4 to 1 2 The two controls used together cover the Close entire range of amplification from 0 4 to 10 8 Figure 7 digiBASE Amplifier Tab 11 50 45 y In almost all cases the default Shaping Time 0 75 us is the preferred setting However the digiBASE supports shaping times from 0 75 us to 2 us in steps of 0 25 us 2 5 2 Amplifier 2 Figure 8 shows the Amplifier 2 for digiBASE Bicron V 908 tab which accesses the InSight About Status Presets Virtual Oscilloscope mode For the Alier Pmelier2 ADC Stabzer HighVotage more advanced user the InSight mode allows you to directly the digiBASE s advanced shaping parameters and adjust them inter actively while collecting live data To access the InSight mode click Start then refer to the discussion in Section 2 5 2 1 InSight When you are satisfied with the Close settings Close the Properties dialog and prepare to acquire data Once data acquisition is underway the advanced user might wish to re
24. T_MODE_SAMPLE SET_MODE_PHA This command sets the MCB to pulse height analysis mode for collection of histogram data SET_MODE_SAMPLE Starts the InSight Virtual Oscilloscope mode SET_ROI start_chan number_of_chans Sets the ROI flags for the specified channels This command can be used multiple times to set ROI flags without affecting previously set flags SET_ROL SAMPLE num Selects which controls signals are displayed as an ROI on the captured waveform Only a single bit can be turned on at a time The following signals can be selected with the associated bit Bit 0 Reserved Bit 1 Reserved Bit 2 Reserved Bit 3 LLD Bit 4 Busy Bit 5 Gate Bit 6 Reserved Bit 7 Peak detect Bit 8 Reserved SET_SEGMENT Not used included for backward compatibility This command executes SET_WINDOW resetting the window of interest to the maximum number of channels SET_SHAP value Sets the shaping time to the setting indexed by value The LIST_SHAP command gives a list of shaping times The SET_SHAP command indexes into that list to set the shaping time For example if the result of the LIST_SHAP is SHAPING 75 100 125 150 175 200 then the following SET_SHAP commands are valid SET_SHAP 0 Sets the shaping time to 0 75 us 75 x 10 ns SET_SHAP 1 Sets the shaping time to 1 us 32 931003D 0914 SET_SHAP 2 SET_SHAP 3 SET_SHAP 4 SET_SHAP 5 4 FIRMWARE COMMANDS AND RESPONSES Sets the shaping time to 1 25 us Sets the shaping
25. W_FEATURES command discussed on page 34 If the feature is supported in the digiBASE the bit is set to 1 if the feature is not supported the bit is 0 digiBASE Bit Meaning 1 0 Software selectable conversion gain 0 1 Software selectable coarse gain 1 2 Software selectable fine gain 1 3 Gain stabilizer 1 4 Zero stabilizer 1 5 PHA mode functions available 0 6 MCS mode functions available 0 7 List mode functions available 1 8 Sample mode functions available 0 9 Digital Offset e g 920 0 10 Software selectable analog offset 1 11 HV power supply 1 12 Enhanced HV SET_HV SET SHOW_HV_POL SHOW_HV_ACT 0 13 Software selectable HV range ENA_NAI DIS_NAD 0 14 Auto PZ START_PZ_AUTO 0 15 Software selectable manual PZ SET SHOW_PZ 0 16 Battery backed real time clock SHOW_DATE TIME SHOW_DATE TIME_START 0 17 Sample changer support SET SHOW_OUTPUT SHOW_INPUT 0 18 One button acquisition ENA DIS SHOW_TRIG_SPEC MOVE 0 19 Nomadic likely to move between opens 0 20 Local app data SET_DATA_APP SHOW_DATA_APP 1 21 Software retrievable serial number 0 22 Power management commands 0 23 Battery status support SHOW_STAT_BATT 0 24 Software selectable AMP polarity SET SHOW_GAIN_POLAR 0 23 Support for flattop optimization ENA DIS_OPTD 0 26 Stoppable AutoPZ STOP_PZ_AUTO 0 27 Network support e g DSPEC 0 28 Multi drop serial support e g MicroNOMAD 22 931003D 0914 digiBASE 0 Oo ooDoDOoOOoOoOoOo
26. ass EAS 48 A FORM LOAD AS he euch lek Ct ans sat aTi 48 ASAS START CLICK ie 49 A 34A STOP CLICK RAS A 51 AROS Prepare VIE e Aa SN 52 ADAG Restore MC altas E Aged 52 Ad Performance o A RO 52 INDEX cgi a A Mee Re on Ales Se Re adas 53 Safety Instructions and Symbols This manual contains up to three levels of safety instructions that must be observed in order to avoid personal injury and or damage to equipment or other property These are DANGER Indicates a hazard that could result in death or serious bodily harm if the safety instruction is not observed WARNING Indicates a hazard that could result in bodily harm if the safety instruction is not observed CAUTION Indicates a hazard that could result in property damage if the safety instruction is not observed In addition the following symbols may appear on the product AN DANGER Hazardous voltage ATTENTION Consult the manual in all cases where this symbol is marked in order to determine the nature of the potential hazards and any actions that must be taken to avoid them Protective earth ground terminal Please read all safety instructions carefully and make sure you understand them fully before attempting to use this product Cleaning Instructions To clean the instrument exterior e Disconnect the instrument from the power source Remove loose dust on the outside of the instrument with a lint free cloth Remove remaining dirt with a lint free cl
27. ata is being acquired and sets the center channel to zero The gain stabilization adjustment is held at its current value until either gain stabilization is reenabled with the ENABLE_GAIN_STABILIZATION command or reinitialized with INITIALIZE_GAIN_STABILIZATION or SET_GAIN_PEAK See also SHOW_GAIN_STABILIZATION DISABLE_HV Turns off the HV enable signal See ENABLE_HV and SHOW_HV DISABLE_ZERO_STABILIZATION Stops stabilization of the zero peak The zero stabilization adjustment is held at its current value until either zero stabilization is reenabled with the ENABLE_ZERO_STABILIZATION command or reinitialized with INITIALIZE_ZERO_ STABILIZATION or SET_ZERO_PEAK See also SHOW_ZERO_STABILIZATION ENABLE_GAIN_STABILIZATION Enables the stabilization of the gain peak See also DISABLE_GAIN_STABILIZATION SHOW_GAIN_STABILIZATION and INITIALIZE_GAIN_STABILIZATION 28 931003D 0914 4 FIRMWARE COMMANDS AND RESPONSES ENABLE_HV Turns on the high voltage enable output of the digiBASE and sets the HV to the target HV value See also DISABLE_HV and SHOW_HV ENABLE_ZERO_STABILIZATION Enables the stabilization of the zero peak See also DISABLE_ZERO_STABILIZATION SHOW_ZERO_STABILIZATION and INITIALIZE_ZERO_STABILIZATION INITIALIZE Resets the digiBASE to factory defaults INITIALIZE_GAIN_STABILIZATION Resets the gain peak stabilization adjustment to 1 0 no adjustment This value is reported as 0 by the SHOW_GAIN_ADJUSTMENT command See al
28. ation This appendix provides details about the List Mode that will enable experienced programmers using the ORTEC CONNECTIONS Programmer s Toolkit with Microsoft ActiveX Controls to write custom software applications for acquiring and saving List Mode data For additional information see http www ortec online com Solutions applications software aspx tab 2 A 1 List Mode Data In List mode each detectable event that would normally be histogrammed into a spectrum is sent to the computer along with a time stamp that indicates the time the pulse arrived The data could be analyzed by the computer in real time to determine if some significant event has occurred or the data might be streamed to disk for analysis at a later time In either case the computer is intimately involved in the collection of the data In List Mode the digiBASE transmits one 32 bit Table 1 Event Word word for every detectable event in the Nal detector 7 The 32 bit word is encoded as shown in Table 1 The time is a 21 bit number in units of us The number rolls over to O every 2 097152 s In order 200 Time in microseconds that the event occurred The digiBASE is equipped with a 128K first in al ne ee first out FIFO buffer that stores the data until the computer has time to read them Should the computer stop reading data the FIFO fills up and all further data are lost until the computer empties the FIFO to track the rollovers a tim
29. between the selected units For example in the previous example file if two digiBASEs are involved in the acquisi tion the first 16 bytes came from the first digiBASE the next 8 bytes came from the second the next 32 came from the first and so on The program can be modified to whatever format is suitable for the particular application A 3 4 Source Code The ListMode program is composed of a single Form Module with the following subroutines and functions Option Explicit Dim bStop As Boolean Dim uConn21 100 As Object Dim TotalCounts 100 As Double A 3 4 1 Declarations bStop is a flag that is used to track when the Stop button has been clicked The uConn21 object variable is used to hold a Connection control for each digiBASE in the acquisition TotalCounts is used to track how many conversions have been sent to the hard disk for each digiBASE A 3 4 2 FORM_LOAD Private Sub Form_Load IstUMCBI CreateList Dim i As Integer For i 1 To IstUMCBI MaxSelection IstUMCBI SelIndex i IstMCBs AddItem IstUMCBI SelName Next i End Sub When the VB form is loaded the list of digiBASEs is created in the list box on the left of the form IstUMCBI is a ULIST control that is part of the CONNECTIONS Toolkit It holds a list of 48 931003D 0914 APPENDIX A LIST MODE MCBs connected to the computer This code gets the names out of that list and puts them in the list box on the form IstMCBs A 3 4 3 START_CLICK T
30. capacity If however multiple digiBASEs are in use simultaneously they must all share the 12M bps Therefore no more than 9M 320K 28 units can be supported at the 10kcps average data rate This maximum also depends on the speed of the computer and the efficiency of the software that is emptying the digiBASE buffers Any other peripherals on the USB bus will further reduce the maximum throughput of the system A 3 Sample Data Collection Application This section shows a simple Microsoft Visual Basic program that transfers list mode data from a digiBASE to the hard disk The program was written with Visual Basic 6 0 and uses the Programmer s Toolkit A 3 1 ORTEC Connections Programmer s Toolkit A11 BW The Programmer s Toolkit is a collection of ActiveX controls that simplify communication with an ORTEC MCB See the Toolkit user s manual for complete information on how to install and use the software The remainder of this note assumes the reader has access to the manual A 3 2 Operation of the List Mode Data Collection Program First the operation of the program will be described and then the code itself will be described in detail When the program is launched a dialog box similar to Fig 17 will be displayed The column on the left lists all of the digiBASEs found on the system To collect data one or more digiBASEs must be selected by marking the checkbox next to the unit s name Once the digiBASE has been selected
31. ccept another pulse i e is not busy and is equal to the real time minus the dead time the time the MCB is not available 2 6 Troubleshooting If properly installed and functioning MAESTRO software cannot find and communicate with the digiBASE check the following e Make sure the USB cable is properly connected to the computer e Make sure USB hubs are correctly connected and functioning Check the Master Instrument List on the computer to ensure that the digiBASE is on the list If it is not listed shutdown and restart the computer then run the MCB Configura tion program from the Windows Start menu as described in Section 2 3 4 17 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 Intentionally blank 18 3 SPECIFICATIONS 3 1 Performance Conversion Gain 1024 channels Coarse Gain Gain settings of 1 3 and 9 controlled by jumper setting as described in Section 2 2 Factory setting is 1x Fine Gain 0 4 1 2 Integral Nonlinearity lt 0 05 over the top 99 of the range Differential Nonlinearity lt 1 over the top 99 of the range Dead Time Accuracy lt 5 error up to 50k cps input count rate Dead time is measured with the a Gedcke Hale live time clock Detector Voltage 0 to 1200 V dc in steps of 1 25 V under computer control Read back of high voltage is available Offset Drift lt 50 ppm of full scale range per C Gain Drift lt 150 p
32. d powered on 2 Connect and power on all other local and network ORTEC instruments that you wish to use as well as their associated computers Otherwise the MCB Configuration program will not detect them during installation Any instruments not detected can be configured at a later time 3 To start the software type mcb in the Search programs and files box on the Windows Start menu then click the MCB Configuration search result or open the Windows Start menu and click MAESTRO then MCB Configuration The MCB Configuration program will locate all of the powered on ORTEC MCBs on the local computer and the network and display the list of instruments found the Master Instrument List Fig 4 If you wish you may enter customized instrument ID numbers and descriptions Section 2 3 4 2 When you close the dialog any changes you have made to an ID number or description will be written back to the corresponding MCB 931003D 0914 2 GETTING STARTED F Configure Instruments Version 8 04 Number amp Description Close 5 digiBASE Bicron 908 Cancel Help Renumber All Renumber New Instr Input System Er ESINGLEY NEW digiBASE RH SN C021810 A Figure 4 MCB Numbering and Descriptions 2 3 4 1 Configuring a New Instrument The first time a new instrument is detected the This is the first time you have configured these detectors dialog shown in Fig 5 will remind you that eee anode reir all
33. e CONNECTIONS E C Instrument Families Podm ee E d SB based instruments list th d Driver Update Kit This product S a must be installed before MAESTRO O Dual Port Memory plug in cards ISA slot Bee Danser icles O TRUMP PCI cards finished can be installed On the Instrument O DART or any other printer port based device bi O microBASE Item Descripti Families page be sure to mark the a Miniature MCA miniCA 166 Check this ent you A a O Maca have any ORTEC USB USB based instruments checkbox a O digiDART R9232 based instrument except as shown in Fig 3 Otherwise the da EPs Je O mcs Pci digiBASE will not be able to com ae municate with the computer and M A E S TR O Local Instrument list lt No instruments found gt If you also have other types of MCBs attached to this computer refer to the installation instructions in the corre sponding hardware manuals Note that you can install device drivers for other Allow other computers to use this computer s instruments XY Figure 3 Choose USB based instruments types of instruments later as described in the CONNECTIONS Driver Update Kit instructions 2 3 2 Step 2 Install MAESTRO Install the accompanying copy of MAESTRO according to the instructions in its User s Manual digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 2 3 3 Step 3 Connect the digiBASE to the Computer 1 Attach yo
34. e only event is sent from the digiBASE to the computer every 1 048576 s The format of the time only event is in Table 2 45 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 amp 8 PPLy p 8 A 2 Throughput Issues In List Mode each event received by the detector results in the transmission of a 32 bit data word to the computer In extreme situations with multiple digiBASEs connected to a single com puter the data rate can overwhelm the computer As an example if a source is placed in front of the detector that results in 10 kcps accumulating in a histogram ten thousand 32 bit data words must be transferred to the computer every second The digiBASE is equipped with a buffer that can hold 128 000 conversions In order to retrieve all of the list data the computer must read the data from the digiBASE before the buffer fills up In this example the computer must read data from the digiBASE at least once every 12 8 seconds to avoid overflow In practice the computer must read more often than this because of the time required for data transfer The USB interface is also a limiting factor in throughput The USB interface is capable of trans ferring 12M bits per second In practice overhead uses about 25 of the bandwidth so the USB bandwidth is approximately 9M bits per second In our example 320K bits per second must be transmitted so the USB has more than enough
35. e prototype line represent numeric values as described in the accompanying text they should not be sent literally to the MCB but should be replaced by an appropriate numeric value In this section the term lt CR gt represents the ASCII carriage return character decimal value 13 and the character _ represents the ASCII underscore character decimal value 95 CLEAR Sets the channels of spectral data to zero The live time and true time counters are also set to zero This command is equivalent to the combination of CLEAR_COUNTER and CLEAR_DATA commands 27 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 CLEAR_ALL This command clears all spectrum channels presets and ROIs It is equivalent to the combination of CLEAR COUNTERS CLEAR DATA CLEAR PRESETS and CLEAR_ROI commands CLEAR COUNTER Sets the live time and true time counters to zero CLEAR_DATA Sets the channels of spectral data to zero The ROI flags and presets are not changed CLEAR_PRESETS The live time and true time presets are all set to zero disabled CLEAR_ROI start length If start and length are not specified the region of interest flags for the channels in the window of interest see SET_WINDOW are cleared If start and length are specified region of interest flags for the channels specified by start and length are cleared DISABLE_GAIN_STAB Stops stabilization of the gain peak while d
36. edance is 5 kQ to 3 3V protected to 10 V The digiBASE operates at a Conversion Gain of 1024 only The Lower Level Discriminator sets the level of the lowest amplitude pulse that will be stored This level establishes a lower level cutoff by channel number for ADC conversions The Upper Level Discriminator sets the level of the highest amplitude pulse that will be stored This level establishes an upper level cutoff by channel number for storage 2 5 4 Stabilizer The digiBASE has both a gain stabilizer and a zero stabilizer their operation is discussed in more detail in the MAESTRO User s Manual The Stabilizer tab Fig 12 shows the current values for the stabilizers The value in each Adjustment sec tion shows how much adjustment is currently applied The Initialize buttons set the adjustment to 0 If the value approaches 90 or above the amplifier gain should be ad justed so the stabilizer can continue to function when the adjustment value reaches 100 the stabilizer cannot make further corrections in that direction The Center Channel and Width fields show the peak currently used for stabilization a Properties for digiBASE Bicron V 908 Amplifier Amplifier2 ADC m Center Chan 10 Width 11 Suggest Region Adjustment Initialize 0 About Status Presets Stabilizer High Voltage Zero Stabilization Enabled Center Chan 10 Width 11 Suggest Region Adju
37. enabled O disabled 1 enabled 931003D 0914 4 FIRMWARE COMMANDS AND RESPONSES Example Responses D0100000003077 lt CR gt 1000 V negative not overloaded disabled D0100000002076 lt CR gt 1000 V positive not overloaded disabled D0100000007082 lt CR gt 1000 V negative not overloaded enabled SHOW_INTEGRAL start_chan number_of_chans Reports the sum of the specified group of spectral data channels If start_chan and number_of_chans is not provided SHOW_INTEGRAL reports the sum of all channels in the currently selected segment that have their ROI flag set Responses G0000000000075 lt CR gt Integral reported as 0 G4294967294131 lt CR gt Integral reported as 4294967294 G4294967295132 lt CR gt Integral reported as greater than or equal to 4294967295 maximum reportable value SHOW_LENGTH_SAMPLE Reports the number of points in the InSight Mode Waveform Response C00256100 256 points in the waveform SHOW_LIVE Reports the contents of the live time counter in units of 20 ms 50 ticks s See also CLEAR_COUNTERS and SET_LIVE Responses G0000000000075 lt CR gt Live time reported as O ticks G0000000001076 lt CR gt Live time reported as 1 tick 20 ms G4294967295132 lt CR gt Live time reported as 4294967295 ticks over 23000 days SHOW_LIVE_PRES Reports the current live time preset in units of 20 ms 50 ticks s See also CLEAR_PRESETS and SET_LIVE_PRESET Responses G0000000000075 lt CR gt
38. ets data acquisition will continue until manually stopped When more than one preset is enabled set to a non zero value the first condition met during the acquisition causes the MCB to 931003D 0914 r Properties for digiBASE Bicron V 908 Amplifier Ampifier2 ADC __ _Stabiteer Hh Votage About Status Presets APP Enable Counter 0 Aux0 Counter 0 Aux Counter 0 Figure 15 digiBASE Status Tab r Properties for digiBASE Bicron V 908 a i a Amplifier Amplifier2 ADC Stabilizer High Voltage Real Time s Live Time s Close Figure 16 digiBASE The Presets Tab stop This can be useful when you are analyzing samples of widely varying activity and do not know the general activity before counting The Aux0 and Auxl counters are reserved for future use 16 931003D 0914 2 GETTING STARTED The values of all presets for the currently selected MCB are shown on the Status Sidebar These values do not change as new values are entered on the Presets tab the changes take place only when you Close the Properties dialog Enter the Real Time and Live Time presets in units of seconds and fractions of a second These values are stored internally with a resolution of 20 milliseconds ms since the MCB clock incre ments by 20 ms Real time means elapsed time or clock time Live time refers to the amount of time that the MCB is available to a
39. for one digiBASE adding subsequent units is simple REMINDER Be sure to run MCB Configuration any time you add new digiBASEs or other ORTEC MCBs to your system or when you move an instrument from one USB port to another 2 3 6 Connecting to and Disconnecting from the Computer The USB connection allows you to connect digiBASE to and disconnect them from a USB port without shutting down the computer or USB hub Note that if MAESTRO is running when you 8 931003D 0914 2 GETTING STARTED disconnect the digiBASE you will see a detector not responding message on the status line at the bottom of the MAESTRO window When you reconnect the digiBASE to the computer you will have to reselect 1t from the detector droplist on the Toolbar 2 4 Additional Notes 2 4 1 Attaching More Than One digiBASE to the Computer Once the drivers have been installed for one digiBASE adding subsequent units is simple You can attach as many digiBASE units to a computer as the computer has USB ports and add on USB hubs to a limit of 255 as discussed in Section A 2 their use is subject to some limitations REMINDER Be sure to run MCB Configuration any time you add new digiBASEs or other ORTEC MCBs to your system 2 4 2 Connecting to and Disconnecting from the Computer The USB connection allows you to connect digiBASEs to and disconnect them from a USB port without shutting down the computer or USB hub Note that if MAESTRO is running when y
40. gt Conversion gain reported as 1024 channels SHOW_GAIN_FINE Returns the current fine gain setting See SET_GAIN_FINE Sample Response GAIN_FINE 0000000000000 8 Fine gain is set to 0 8 SHOW_GAIN_POLARITY Returns the polarity of the amplifier input as F records Responses IPOS lt CR gt Always positive in digiBASE SHOW_GAIN_STABILIZATION Reports the state of gain peak stabilization See also ENABLE_GAIN_STABILIZATION and DISABLE_GAIN_STABILIZATION Responses IT lt CR gt Gain stabilization is currently enabled IF lt CR gt Gain stabilization is currently disabled SHOW_GAIN_WIDTH Reports the current width for the stabilizer gain peak See also SET_GAIN_WIDTH SET_GAIN_CHANNEL and SHOW_GAIN_CHANNEL Responses C00001088 lt CR gt Gain width has not been set C00003089 lt CR gt Gain width is 3 channels lowest possible width C00256100 lt CR gt Gain width is 256 channels SHOW_GATE Reports the current setting for the GATE Enable Input 35 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 amp amp PP p 8 Example Responses FOOFF lt CR gt Gate disabled F1COIN lt CR gt Gate set to coincidence mode Low during peak detect rejects conversions F2ENABLE lt CR gt Gate functions as ENABLE Stops clocks and conversions when low F3IEVENT lt CR gt Gate functions as event counter SHOW_HV Reports the current high voltage and the status
41. hat rad P the tube socket is to the right In AAA this orientation when the jumper o o ol PMT base is on the left most and center pins the coarse gain is 1 When the jumper is on the right most and center pins the coarse gain is 3 The gain is 9 when the jumper is removed These set tings are illustrated in Fig 2 To avoid losing the jumper in this high gain setting place it on just one of the pins at a 90 angle to the connector e After putting the jumper in the desired location slide the shroud back over the unit carefully guid ing the USB and ENABLE INPUT connectors through the holes in the panel Figure 2 Setting the Coarse Gain Jumper e Replace the set screws e Replace the washer and nut on the ENABLE INPUT connector 931003D 0914 2 GETTING STARTED 2 3 Software and Hardware Installation Installing the digiB ASE and the MAESTRO MCA Emulation Software takes just four easy steps 1 Install the accompanying version of the CONNECTIONS Driver Update Kit p n 797230 being sure to select USB based instruments on the Instrument Families screen 2 Install the accompanying version of MAESTRO A65 BW 3 Connect the digiBASE to the USB port on the computer 4 Run the MCB Configuration program to establish communication with your MCBs 2 3 1 Step 1 Install the CONNECTIONS Driver Update Kit The first step is to install the accom Instrument Setup panying version of th
42. he START_CLICK function is the heart of the data collection This function is executed in response to clicking the Start button on the form Private Sub 7cmdStart_Click Dim i Dim Version As String Dim SerialNumber As String Dim StartTime As Date Dim StopTime As Date rtbStatus Text rtbStatus SelStart O rtbStatus SelLength O For i 1 To IstMCBs ListCount If IstMCBs Selected i 1 Then Set uConn21 i 1 CreateObject UMCBI CONN 2 IstUMCBI SelIndex i uConn21 i 1 Address IstUMCBI SelAddress uConn21 i 1 Open Version Trim uConn21 i 1 Comm SHOW_VERSION SerialNumber Trim uConn21 i 1 Comm SHOW_SNUM Version Left Version Len Version 1 Version Mid Version 3 SerialNumber Mid SerialNumber 3 rtbStatus SelText IstUMCBI SelName Version amp Version amp Serial Number amp SerialNumber PrepareMCB i 1 TotalCounts i 1 0 End If Next i START ALL Dim IData As Variant Open TestData bin For Binary As 1 StartTime Time 49 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 For i 1 To IstMCBs ListCount If IstMCBs Selected i 1 Then uConn21 i 1 Comm START End If Next i Loop Collecting data bStop False Dim oldtime oldtime Timer While Not bStop For i 1 To IstMCBs ListCount If IstMCBs Selected i 1 Then IData uConn21 i 1
43. he display is updated every time a new pulse exceeds the trigger level To keep a single pulse displayed select Single Click Reset to refresh the display to see the next pulse There will usually be one or two pulses in the pipeline that will be displayed before any change entered will be seen If the trigger is turned off the display will be redrawn periodically even if no pulse is there Just as for the PHA mode display the vertical scale can be adjusted with the vertical adjust ments The display can be set to Log mode but the peak shapes do not have a familiar shape in this display The Auto mode will adjust the vertical scale for each pulse The pulse is shown before the amplifier gain has been applied so the relation between channel number and pulse height is not fixed The horizontal scale extends from 16 to 256 channels The display is expanded around the marker position which means that in some cases the peak will disappear from the display when it is expanded 11 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer InSight fg11 SPC File Acquire Calculate Services ROI Display a E Mcb Model No DBAS 001 Figure 9 digiBASE InSight Mode 931003D 0914 181xi Mark Peak ye Trigger LLD y IV Single Reset Delay l 0 00 Baseline Restorer AutoC O ys Fast Slov up e 4 Pole Zero Auto 52428 Other Controls
44. he form Fmmmm vvv lt CR gt where mmmm is a 4 character model designator and vvv is a 3 character version designator Example Responses FDBAS 001 lt CR gt digiBASE firmware version 1 reported SHOW_WINDOW Reports the start channel and number of channels in the window of interest in the form Dxxxxxyyyyyccc lt CR gt where xxxxx is the start channel 0 to conversion gain 1 and yyyyy is the number of channels 1 to conversion gain See SET_WINDOW for more information about the window of interest Example Responses D0000001024079 lt CR gt Window of interest reported as starting at channel 0 and continuing for 1024 channels D0000001512080 lt CR gt Window of interest reported as starting at channel 0 and continuing for 512 channels first 1 2 D0051200512088 lt CR gt Window of interest reported as starting at channel 1024 and continuing for 512 channels last 1 2 SHOW_ZERO_ADJUST Returns percentage adjustment that has been applied by the stabilizer SHOW_ZERO_CHANNEL Reports the current center channel for the stabilizer zero peak or zero if the zero channel has not been set See also SET_ZERO_CHANNEL Responses C00000087 lt CR gt Zero channel has not been set C00002089 lt CR gt Zero channel is channel 2 lowest possible channel C00250094 lt CR gt Zero channel is channel 250 SHOW_ZERO_STABILIZATION Reports the state of zero peak stabilization See also ENABLE_ZERO_STABILIZATION and DISABLE_ZERO_STABI
45. her controls toggle these are not functional for the digiBASE 2 5 3 ADC This tab Fig 11 contains the Gate Properties for digiBASE Bicron V 908 Lower Level Discriminator and U Level Discriminator controls pper Seve i Amplifier Ampifier2 ADC Stabilizer High Voltage In addition the current real time and a e live time are monitored at the bottom e Ronse Gor MEE 3 of the dialog Lower Level Disc 24 Upper Level Disc 1023 The Gate control allows you to select a logic gating function With this function Off no gating is per eae ae formed that is all detector signals 0 00 0 00 are processed Close When the Gate is set to Enable if the ENABLE INPUT is low lt 0 8V real time live time and data acquisition are stopped When the ENABLE INPUT is left open or forced high gt 2 0V real time live time and data acquisition are enabled Figure 11 digiBASE ADC Tab 13 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 If set to Coincidence when the ENABLE INPUT is low real time and live time operate nor mally but no counts are stored in memory If the ENABLE INPUT is high normal acquisition occurs If set to Event rising edges are counted by a 32 bit event counter The contents of this counter can be monitored in the Enable Counter field on the Status tab Section 2 5 7 The input imp
46. ker ENA DIS_ CLICK Software readable thermistor SHOW_THERM Floating point fine gain SET SHO VERI LIST_GAIN_FINE Software enabled pileup rejector ENA DIS SHO_PUR SET VERI_WIDT_REJ Alpha style HV power SHOW_HV_CURRENT Software readable vacuum SHOW_VACUUM Acquisition alarms ENA DIS SHO_ALARM Hardware acquisition trigger ENA DIS SHO_TRIG Ordinal numbers for shaping times SET_SHAP 0 SET_SHAP 1 Query gain ranges LIST VERI_GAIN_FINE _COAR CONV Routable inputs SET SHOW_INPUT_ROUTE 23 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 24 digiBASE 0 oo Oo Oo B OOR C CO A O O O O rO O O O OO PPC O0OOoSo yo ooo Bit 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 Meaning External dwell support ENA DIS_DWELL_EXT Selectable SUM or REPLACE MCS modes ENA DIS_SUM External start of pass support ENA DIS SHO_START_EXT Explorable with MCS list commands LIST_SOURCE LIST_LLSCA LIST_ULSCA Device supports the MDA preset Software selectable ADC type Matchmaker Has ability to daisy chain MCBs DART ZDT functions available DSPEC Plus DSPEC Plus style Insight triggering LIST SET_TRIG_SAMP Multiple inputs per connection for example OCT TE Plus Hardware count rate meter SH_CRM Has multiple ZDT modes SET SHOW LIST_MODE_ZDT Has mu
47. lti nuclide MDA preset Has MCS Replace then Sum Mode SET_RPLSUM Has programmable external dwell voltage capability No Peak Preset feature M CA and OASIS Programmable pulser OASIS Programmable Vacuum HV interlock OASIS Programmable Current HV interlock OASIS 0 Explorable Stabilizer LIST_GAIN_ADJU LIST_ZERO_ADJU Has programmable input impedance MCS Advanced shaping time feature has no CUSP digiDART DSPEC jr Selectable HV rise time SET SHOW LIST_HV_RISE SBS 60 Explorable ADC_GATE settings LIST_GATE SET_GATE n Monitor command support SHOW_MONI_MAX LABEL VALUE SMART 1 Detector support SHOW_SMART_DET SHOW_SNUM_DET SHOW_HV_RECO Nuclide report SET SHOW_NUCL_COEF SET SHOW_ROI_ NUCL Interactive Display Features Such as Nuclide Report Advanced Stored Spectra SH_SPEC_COUNT SET SHOW_SPEC_ID MOVE SET SHOW LIST_VIEW in new ZDT and GATE routing MCBs with DPM or RS 232 Connected to MCB via RS 232 slow port No SET_HV_POSI SET_HV_NEGA ENA_NAT DISA_NAI 4 FIRMWARE COMMANDS AND RESPONSES Most software communication with the digiBASE will take place through the CONNECTIONS software layer CONNECTIONS is used by all ORTEC software and can be accessed for other software development with our CONNECTIONS Programmer s Toolkit with Microsoft ActiveX Controls A11 Use the DLL interface call MIOComm or the ActiveX control UCONN s Comm method to send commands to instruments and receive responses 4 1
48. mation on the ENABLE INPUT and USB connector see Chapter 3 ORTEC 2 digiBASE ENABLE USB JEDEC B14 38 PMT Pin Base Pinouts d1 d10 dynodes 1 10 a anode i c internal connection g grid k cathode Figure 1 The digiB ASE Connectors 2 2 Setting the Coarse Gain Jumper The digiBASE has 3 coarse gain settings 1 3 and 9 determined by setting a jumper within the unit The factory setting is 1x Fine gain is software controlled within MAESTRO see Section 2 5 3 To change the coarse gain e Disconnect the digiBASE from USB cable and wait 1 minute for the internal circuits to completely discharge DANGER HIGH VOLTAGES are present on the tube socket and inside the unit Never operate the digiBASE with the shroud removed or without a detector installed on the socket digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 e With a 5 16 in wrench remove the nut on the ENABLE INPUT connector e With a 0 050 in Allen wrench remove the 4 set screws that hold the shroud in place e Slide the shroud off of the socket to expose the internal circuit boards CAUTION Do not touch any components on the circular board Oils from your fingers can contaminate the components and result in poor operation of the bias supply Locate the 3 pin jumper on the rectangular board that does not have the USB connector mounted on it e Orient the digiBASE such t
49. new instruments must be assigned a unique numbers for your detectors non zero ID number Click OK You can either manually change the ID Number and Description as described in the next subsection or you can click the Renumber New button Figure 5 New Instruments Must Have a Non to renumber only the new instruments Zero ID Number NOTE We strongly recommend not using the Renumber All button In addition we strongly recommend not renumbering MCBs that belong to other users as this could affect the interaction between their MCBs and their ORTEC software for instance if they control their MCBs with JOB files e g the JOB file command SET_DETECTOR 5 or use the GammaVision or ISOTOPIC spectroscopy applications See also the NOTE FOR MULTIPLE USERS ON A NETWORK in the next section 2 3 4 2 Customizing ID Numbers and Descriptions If you wish you can change the instrument ID Numbers and Descriptions by double clicking an instrument entry in the Configure Instruments dialog This will open the Change Description or ID dialog Fig 6 It shows the physical MCB location read only and allows you to change the ID Number and Description If this is a first time installation of ORTEC products all your instruments will be new digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 amp amp PP p 8 r Change Description or ID Instrument Input System ID
50. not lose information The rate was further increased until overflow of the FIFO began occurring At that point the combined rate was 240 kcps There was no other peripheral on the USB bus and the computer was dedicated to running the program 52 Abouttab to ae 15 Acquisition presets papis rolls 16 Vetme a eM 17 les da 17 ADC SEP errado dedos 13 Amplifier settings easily 10 Auto mode in InSight mode 11 Coarse gain jumper Yat cians ode esas Sed ears 3 A ee en ee eS 17 Enable countet aaa Sabon cate has Geka es 16 Feature mask Dlls ra ne hag tele ecb oars 22 A cy be aaa el ee eae 10 Gain stabilization Vasos 14 A a E O a E A 13 A o t iena a 15 Srah Moden 5 5 58 a ta iena a 10 Mark rifon O e Na 12 Mark TYPOS ted Bich cig oh ta iaa a 13 MA OR st ics set E esterase 5 Pist Moder seda dela 20 45 O e D 45 data collection application 46 event A a E N i 1 20 throughput issues oo oooooooomoo o 46 time stamp word reses tia leia 20 Visual Basic example 46 A eye oa ae tk enh ca 17 Loa mode mus a E ig hil oh ays 11 Lower level discriminator LLD 14 Mark InSight mode 12 13 Offset arp 2 inian Par gigas Seat eh ae A ah aca 11 PHA mode srta Sabai cele ha leh ead 11 PIN ASSISNMEMS o etch oy rolls 3 E oa 16 Realtime arts ach tuts cee eae eel pbs 17 Sa A Bard aan o a each Sah ey 16 Troubleshooting 35 456 codi beng bras 17 Upper level discrimina
51. nsigned number Dxxxxxyyyyyccc lt CR gt XXXxXx and yyyyy are 16 bit unsigned numbers Exxxxxccc lt CR gt XXXXX is a single 16 bit alarm mask Fssss lt CR gt ssss is a variable length ASCII character sequence no checksum is sent with this record Gxxxxxxxxxxccc lt CR gt XXXXXXXXXX s a Single 32 bit unsigned number IT lt CR gt True response to a SHOW command no checksum IF lt CR gt False response to a SHOW command no checksum Jxxxxxy y y y y ccc lt CR gt Response to SHOW_CONFIGURATION command MXXXXXXXXXx ccc lt CR gt Response to SHOW_STATUS command Nxxxyyyzzzccc lt CR gt XXX yyy and zzz are 8 bit unsigned numbers 4 2 2 MCB Commands This section lists each command with a description of its operation The descriptions include a list of any error codes that may result As described in the two preceding sections the usual response is a macro error code of 0 and a micro error code of 0 no errors Though syntax and communication error responses may result from any command in practice these error responses rarely occur on systems with reliable communication hardware running debugged software The commands are listed in alphabetical order each starting with a command prototype line Uppercase letters numeric digits blank space and special symbols such as the underscore _ and comma 13 in the prototype line are literal text to be sent to the MCB exactly as they appear Lowercase letters in th
52. of the high voltage power supply in the form DVVVVVSSSSSCCC Where vvvvv represents the current output voltage if the high voltage is enabled or the rear panel high voltage setting if the high voltage is disabled sssss represents the status of the high voltage bias supply as a 16 bit decimal number with the following bit definitions Bit 0 LSB Bias supply polarity O positive 1 negative Bit 1 Bias supply overload O overload 1 normal Bit 2 High voltage enabled O disabled 1 enabled Example Responses D0100000003077 lt CR gt 1000 V negative not overloaded disabled D0100000002076 lt CR gt 1000 V positive not overloaded disabled D0100000007082 lt CR gt 1000 V negative not overloaded enabled SHOW_HV_ACTUAL Returns the value of HV actually on the detector SHOW_HV_POLARITY This returns the HV polarity setting as a F record always positive for the digiB ASE Response IPOS lt CR gt The HV is positive SHOW_HV_TARGET 36 Under normal operation the HV will go to this value when the HV is enabled Reports the current HV setting see SET_HV and the status of the HV power supply in the form Dvvvvvsssssccc lt CR gt where vvvvv represents the HV setting and sssss represents the status of the HV bias supply as a 16 bit decimal number with the following bit definitions Bit 0 LSB Bias supply polarity O positive 1 negative Bit 1 Bias supply overload O overload 1 normal Bit 2 HV
53. oth dampened in a general purpose detergent and water solution Do not use abrasive cleaners e Allow the instrument to dry completely before reconnecting it to the power source vi 1 INTRODUCTION The ORTEC digiB ASE is a 14 pin photomultiplier tube base for gamma ray spectroscopy applications with Nal Tl scintillation detectors and accommodates virtually all 14 pin tube bases used with Nal detectors The digiBASE combines a miniaturized preamplifier and detector high voltage 0 V to 1200 V bias with a powerful digital multichannel analyzer and special features for fine time resolution measurements all incorporated into a lightweight 10 1 oz compact 63 mm diameter x 87 mm length tube base with a USB connection Everything needed to connect to your Nal Tl detector is included in the tube base no interface card to install no external NIM based components Nal T1 detectors have a gain that is sensitive to changes in ambient temperature and magnetic fields The digiBASE incorporates a gain stabilizer to significantly diminish this sensitivity It works by monitoring the centroid of a designated peak in the energy spectrum the fine gain is automatically and continuously adjusted to maintain the centroid of the peak at its desired position The digiBASE is supplied with our MAESTRO MCA Emulation Software For those who wish to integrate the digiBASE into their own software systems we offer the CONNECTIONS Program mer
54. ou disconnect the digiBASE you will see a detector not responding message on the status line at the bottom of the MAESTRO window When you reconnect the digiBASE to its USB port the same port to which it was attached when MCB Configuration was last run you will have to reselect it from the detector pick list on the Toolbar 2 5 digiBASE MCB Properties in MAESTRO This section discusses the hardware setup dialog you will see within MAESTRO and other CON NECTIONS programs when you select the MCB Properties command under the Acquire menu The digiBASE is completely software controlled the MCB Properties dialog contains all of the instrument controls including ADC setup parameters acquisition presets high voltage the gain and zero stabilizers and amplifier gain adjustments Just move from tab to tab and set your hard ware parameters then click Close As you enter characters in the data entry fields the characters will be underlined until you move to another field or until 5 seconds have elapsed without data entry During the time the entry is underlined no other program or computer on the network can modify this value NOTE The changes you make on most property tabs take place immediately There is no cancel or undo for this dialog digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 2 5 1 Amplifier 7 ec r Figure 7 shows the Amplifier tab Properties for digiBA
55. pm per C Shaping Time Bipolar shaping adjustable under computer control from 0 75 us to 2 us in steps of 0 25 us Presets e Live Time up to 8 5x10 seconds in steps of 20 ms e Real Time up to 8 5x10 seconds in steps of 20 ms Spectrum Stabilizer The digiBASE features built in gain and offset stabilization circuitry Stabilization is performed by providing a reference peak in the spectrum which the MCA can monitor should drift be detected the gain and offset of the system are adjusted automatically to correct for the drift The stabilizer can correct for 10 of FSR error in offset and uses the full range of the fine gain to correct for gain errors Ron Jenkins R W Gould and Dale Gedcke Quantitative X Ray Spectrometry New York Marcel Dekker Inc 1981 pp 266 267 19 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 8 8 PPLy p 8 3 1 1 Inputs ENABLE INPUT The SMA connector accepts a TTL signal the function of which depends on the Gate setting on the ADC tab under Acquire MCB Properties in MAESTRO e When set to Enable if the ENABLE INPUT is low lt 0 8V real time live time and data acquisition are stopped When the ENABLE INPUT is left open or forced high gt 2 0V real time live time and data acquisition is enabled e If set to Coincidence when the ENABLE INPUT is low real time and live time operate normally but no counts are stored in
56. returns a first channel of 0 and a number of channels of 0 The SHOW_ROI command is used to report the first group of channels that all have their ROI bit set Example Responses D0100000050078 lt CR gt Next ROI group starts at channel 1000 and is 50 channels long D0215000150086 lt CR gt Next ROI group starts at channel 2150 and is 150 channels long D0000000000072 lt CR gt No other ROI groups to report 38 931003D 0914 4 FIRMWARE COMMANDS AND RESPONSES SHOW_PEAK This command returns the contents of the ROI channel with the largest number of counts An ROI channel is a channel that has the ROI flag set The maximum possible value is 2147483647 which 1s the maximum number of counts that can be stored in a 31 bit channel Responses G0000000000075 lt CR gt Maximum count in an ROI channel is zero or no ROI channels were found G0000000001076 lt CR gt Maximum count in an ROI channel is 1 G2147483646120 lt CR gt Maximum count in an ROI channel is 2147483646 G2147483647121 lt CR gt Maximum count in an ROI channel is 2147483647 SHOW_PEAK_CHANNEL This command returns the number of the ROI channel with the largest number of counts An ROI channel is a channel that has the ROI flag set The lowest number ROI channel with the largest count is reported if more that one channel contains the largest number of counts Responses C00000087 lt CR gt Maximum count was found in channel 0 or no ROI channels were found see
57. s 00000ccc where aaaaa represents the conversion gain for the one and only segment in the currently selected device and ccc represents the record checksum See Section for more information about response records and checksums SHOW_CONFIGURATION_MASK Returns two masks the first of which can be anded with data from the MCB to clear the ROI bit from the data When the second mask value is anded with data from the MCB the data bits are removed and only the ROI bit remains Response CONF_MASK 02147483647 02147483648 SHOW_DEVICE Shows the currently selected device Always 1 for the digiB ASE SHOW_FEATURES Responds with four 32 bit masks indicating which features are present in the MCB See Appendix 3 4 for a complete description of each bit in the mask Example Response FEATURES 02149587261 01619623948 02175271168 00000000000 SHOW_GAIN_ADJUST Returns percentage adjustment that has been applied by the stabilizer 34 931003D 0914 4 FIRMWARE COMMANDS AND RESPONSES SHOW_GAIN_CHANNEL Reports the current center channel for the stabilizer gain peak or zero if the gain channel has not been set See also SET_GAIN_CHANNEL Responses C00000087 lt CR gt Gain channel has not been set C00002089 lt CR gt Gain channel is channel 2 lowest possible channel C00250094 lt CR gt Gain channel is channel 250 SHOW_GAIN_CONVERSION This command returns the conversion gain 1024 channels Responses C01024094 lt CR
58. s Toolkit A11 BW The Toolkit offers Microsoft ActiveX con trols to simplify pro gramming with National Instruments LabVIEW and Microsoft Visual C and Visual Basic Installing the digiBASE is a snap with its USB connection Just install the accompanying CONNECTIONS Driver Update Kit and MAESTRO software connect the digiBASE to the USB port of the computer start MAESTRO and begin making measurements it s that easy MAESTRO contains all the controls needed to adjust the acquisition parameters acquire the data and save the spectra As a member of our CONNECTIONS family of ORTEC products it also provides full networking with other ORTEC MCBs and supporting computers If you need the ultimate in fine time resolution especially important for Homeland Security applications the digiBASE features List Mode operation in which each valid input signal is converted to a digital value which is transmitted to the computer along with the time the event occurred Time is measured to the nearest microsecond Each event causes a 32 bit word to be transmitted to the computer See Appendix A for a detailed discussion of this feature and how to capture the data stream generated in this mode If you wish to use more than one digiBASE ORTEC offers four and seven port powered USB hubs ORTEC Models C USB HUB 4B and C USB HUB 7B respectively rated for both high and low speed USB operations Daisy chain multiple hubs to control as many as
59. s no lower than channel 0 and the ending channel is no higher than the maximum channel as determined by the conversion gain The gain channel and width must be set before gain stabilization can be enabled The absolute minimum width for the gain peak is 3 channels See also SHOW_GAIN_WIDTH SET_GAIN_CHANNEL and SHOW_GAIN_CHANNEL SET_GATE value Sets the function of the ENABLE INPUT Value is used as an index into the list returned by LIST_GATE For example SET_GATE 0 turns the ENABLE INPUT off SET_GATE 1 sets the ENABLE INPUT to be a coincidence gate etc SET_HV value This sets the HV bias to value in volts and stores value as the target HV SET_LIVE_PRESET ticks Sets the live time preset to the specified number of ticks 20 ms tick During data acquisition when the live time counter reaches the preset number of ticks the preset is complete and the acquisition is stopped Setting a live time preset to 0 ticks disables the preset See also CLEAR_PRESETS and SHOW_LIVE_PRESET SET_LLD chans Sets the lower level discriminator to chan which must be between O and conversion gain 1 See also SHOW_LLD 31 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 SET_MODE_LIST Puts the unit in List mode as opposed to InSight or PHA Mode In List mode individual peak values are stored along with the time the pulse arrived are stored and transferred to memory See SET_MODE_PHA and SE
60. shipment each AMT instrument must pass a stringent set of quality control tests designed to expose any flaws in materials or workmanship Permanent records of these tests are maintained for use in warranty repair and as a source of statistical information for design improvements Repair Service If it becomes necessary to return this instrument for repair it is essential that Customer Services be contacted in advance of its return so that a Return Authorization Number can be assigned to the unit Also AMT must be informed either in writing by telephone 865 482 4411 or by facsimile transmission 865 483 2133 of the nature of the fault of the instrument being returned and of the model serial and revision Rev on rear panel numbers Failure to do so may cause unnecessary delays in getting the unit repaired The AMT standard procedure requires that instruments returned for repair pass the same quality control tests that are used for new production instruments Instruments that are returned should be packed so that they will withstand normal transit handling and must be shipped PREPAID via Air Parcel Post or United Parcel Service to the designated AMT repair center The address label and the package should include the Return Authorization Number assigned Instruments being returned that are damaged in transit due to inadequate packing will be repaired at the sender s expense and it will be the sender s responsibility to make claim with the
61. so SET_GAIN_ADJUSTMENT ENABLE_GAIN STABILIZATION and DISABLE_GAIN_STABILIZATION INITIALIZE_ZERO_STABILIZATION Resets the zero peak stabilization adjustment to 0 no adjustment This value is reported as 0 by the SHOW_ZERO_ADJUSTMENT command See also SET_ZERO_ADJUSTMENT ENABLE_ZERO_STABILIZATION and DISABLE_ZERO_STABILIZATION LIST_GAIN_ADJUST Displays the range of gain stabilizer adjustment that can be returned with the SHOW_GAIN_ADJUST command A value of 100 corresponds to the internal value of 100 and 100 corresponds to 100 Response GAIN_ADJU 100 100 100 100 LIST_GAIN_CONVERSION digiBASE operates at a conversion gain of 1024 only Response CONV_GAIN 1024 LIST_GAIN_FINE Lists the valid fine gain settings digiBASE has a fine gain range between 0 4 and 1 2 Response GAIN_FINE 0 4 1 2 13107 39322 29 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 8 8 PPLy p 8 LIST_GATE Lists the various ways the GATE ENABLE on the digiBASE can be used Response GATE Off Coincidence Enable Event LIST_HV Lists the valid high voltage settings digiB ASE accepts HV values between 0 and 1200 V in 960 steps 1 25 V step LIST_ROI_SAMPLE Lists the various status bits that can be displayed in InSight mode Response ROI _ SAMP RESV RESV RESV LLD BUSY ULD RESV PKDET LIST_SHAP Displays the valid shaping times in units of 10 ns Response SHAPING 75 1
62. stment Initialize 0 Close Figure 12 digiBASE Stabilizer Tab To enable the stabilizer enter the Center Channel and Width values manually or click the Suggest Region button Suggest Region reads the position of the marker and inserts values into the fields If the marker is in an ROI the limits of the ROI are used If the marker is not in an ROI the center channel is the marker channel and the width is 3 times the FWHM at this energy Now click the appropriate Enabled checkbox to turn the stabilizer on Until changed in this 14 931003D 0914 2 GETTING STARTED dialog the stabilizer will stay enabled even if the power is turned off When the stabilizer is enabled the Center Channel and Width cannot be changed 2 5 5 High Voltage Figure 13 shows the High Voltage tab which allows you to turn the high voltage on or off and set and monitor the voltage Enter the detector high voltage in the Target field click On and monitor the voltage in the Actual field Click the Off button to turn off the high voltage 2 5 6 About This tab Fig 14 displays hardware and firmware information about the currently selected digiBASE as well as the data Acquisition Start Time and Sample description In addition the Access field shows whether the MCB is currently locked with a password see the password discus sion in the MAESTRO User s Manual Read Write indicates that the MCB is unlocked Read Only means it is
63. time to 1 5 us Sets the shaping time to 1 75 us Sets the shaping time to 2 us SET_TRIG_SAMPLE setting Selects the triggering source in InSight Mode See LIST_TRIG_SAMP for legal trigger sources SET_TRUE_PRESET ticks Sets the true time preset to the specified number of ticks 20 ms tick During data acquisition when the true time counter reaches the preset number of ticks the preset is complete and the acquisition is stopped Setting a true time preset to 0 ticks disables the preset The preset should always be set to a multiple of one second See also CLEAR_PRESETS and SHOW_TRUE_PRESET SET_ULD chans Sets the upper level discriminator to chans which must be between 0 and conversion gain 1 See also SHOW_ULD SET_WINDOW start length Sets the window of interest to the specified start channel and number of channels The channels of spectral data in the window of interest are affected by commands such as CLEAR SET_DATA and WRITE If neither start nor length is provided the window is set to the maximum size allowed by the conversion gain specified The window of interest is always set to the maximum size after a SET_DEVICE or SET_SEGMENT command SET_ZERO_ADJUSTMENT value Sets the zero stabilization adjustment to an arbitrary value from 65535 to 65535 The total range of the adjustment value represents 256 channels This adjustment is usually only made by the gain stabilizer and reset to 0 with the INITIALIZE_ZERO_STABILIZATIO
64. tor ULD 14 Visual Basic example List Mode 46 Zero stabiliZati i s 4 22 3 tpn eat 14 Zero stabilization adjustment 33 INDEX 53 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 Intentionally blank 54
65. turn to this tab and switch to the Insight mode to monitor or adjust the shaping parameters interactively with a live waveform showing the actual pulse shape Figure 8 digiBASE Amplifier 2 Tab 10 931003D 0914 2 GETTING STARTED 2 5 2 1 InSight Mode The InSight display Fig 9 shows the actual sampled waveform in the digital processing units on a reference graticule The Properties dialog remains active and can be used to change MCB settings while you are viewing the pulses As none of the traditional analog signals are available in the digiBASE this mode is the only way to display the equivalent amplifier output pulse Note that at the bottom of the window the marker channel is displayed in units of time Exiting InSight Mode To exit the InSight mode and return to the PHA display press lt Esc gt or go to the Insight section on the Amplifier 2 tab and click Stop The PHA mode is set to STOP when you enter the InSight mode InSight Controls The Status Sidebar changes from the PHA mode controls to the InSight controls for adjusting the peak display On the left is a vertical scrollbar for adjusting the vertical offset of the wave form The value of the offset is shown on the display Double clicking the mouse in the scrollbar will set the vertical offset to the vertical value of the channel at the marker position This lets you conveniently zoom in on a particular part of the waveform In the Auto trigger mode t
66. ub class of error with O meaning no error In case of error condition you can use the MIOGetLastError DLL interface or GetErrMajor GetErrMinor ActiveX control interface Macro error codes 0 Success gt Power up just occurred Battery backed data lost 25 digiBASE PMT Base with Integrated Bias Supply Preamplifier and Digital Multichannel Analyzer 931003D 0914 E 132 Invalid Command For macro code 129 syntax error or 131 execution error the following apply 129 Micro error codes Success Input already started stopped 2 Preset already exceeded Input not started stopped Parameter was rounded for decimal numbers No sample data available 4 2 1 Dollar Response Records SHOW and STEP commands respond with a single dollar response record followed immediately by a percent response record All valid dollar response records for each command are listed in the command dictionary The following list provides the general form of each dollar response record for the MCB API In this list lower case letters represent numeric values The letters ccc always represent an 8 bit 26 931003D 0914 4 FIRMWARE COMMANDS AND RESPONSES unsigned checksum of all characters on the record up to but not including the checksum characters and lt CR gt represents the ASCII carriage return character SAxxxcec lt CR gt xxx is a single 8 bit unsigned number Cxxxxxccc lt CR gt XXXXxX s a single 16 bit u
67. ur PMT and detector to the digiB ASE Before doing so make sure the PMT matches the pin assignments shown in the figure above Align the PMT pins so that they key correctly and firmly seat the PMT in the digiBASE socket 2 With the computer powered on connect the digiBASE to the USB port on your computer 3 Windows will indicate that new hardware has been detected In Windows 8 and 7 the driver will install without a wizard In XP the new hardware installation wizard will open Click Next indicate you do not wish to connect to the internet or the Microsoft website to locate the driver choose the automatically locate driver option and follow the remaining prompts to completion When this operation is complete you are ready to run the MCB Configuration program so that MAESTRO and other CONNECTIONS software can recognize the digiB ASE 2 3 4 Step 4 Run the MCB Configuration Program to Establish Communication With Your MCBs IMPORTANT This is an abbreviated discussion of the operation and use of the MCB Configuration program We strongly recommend that you read the instructions for the CONNECTIONS Driver Update Kit for complete details on the command line arguments that change how the program searches for MCBs customizing MCB ID Numbers and Descriptions changing your Windows firewall settings to allow MCB access across a network enabling additional device drivers and troubleshooting 1 Make sure the digiBASE is connected an
68. x Comm STOP uConn21 Index Comm CLEAR uConn21 Index Comm SET_MODE_LIST End Sub This function sends the commands to prepare the digiBASE to collect List data STOP stops and acquisition in progress CLEAR clears the data currently in the unit SEP_MODE_LIST puts the digiBASE into List Mode A 3 4 6 RestoreMCB Sub RestoreMCB Index uConn21 Index Comm STOP uConn21 Index Comm SET_MODE_PHA End Sub RestoreMCB puts the digiBASE back into normal pulse height analysis PHA mode The digiBASE must be in PHA mode for MAESTRO to function normally A 3 4 7 Performance NOTE As mentioned previously the maximum count rate the that can be attained without the loss of data from the FIFO file is a function of the throughput capacity of USB the number of digiBASEs connected to the computer and the speed memory and operat ing system that are employed for the measurement The following performance descrip tion is designed to help you estimate the performance of your system Three digiBASEs were connected to the system Suitable sources were placed on the detectors such that 50 kcps were being placed in the histogram of each of the three detectors 150 kcps total rate for all three The program was able to read and store the data without loss of information As a test of the maximum attainable rate the rate on one of the detectors was increased to 100 kcps for a total rate of 200 kcps The system once again did

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