Multiport Multichannel Analyzer User`s Manual
Contents
1. Basic Spectroscopy Operations 16 Refer to the Genie 2000 Operations manual for detailed instructions on basic spectros copy operations The following sections describe the Multiport s auxiliary functions which may be required in some applications They work in conjunction with input and output signals accessed through the supplied 14 lead cable connected to the Multiport s rear panel I O connector The GATE signal is used in PHA mode to allow external control of events to allow particular events to be digitized and stored The Coincidence Mode option on the MCA Adjust screen ADC section contains two choices Off Anticoincidence and Coincidence Note that this feature is only applicable for use with the Internal ADC When external gating is not used Off Anticoincidence should be selected When no signal is attached the Gate input is pulled low internally so in this case Anticoinci dence essentially has the same effect as Off With an external signal attached the selection of Anticoincidence or Coincidence de termines how events will be digitized and stored When Coincidence is selected a TTL high signal on the GATE input at time of Peak Detect allows that particular event to be digitized and stored A TTL low signal at Peak Detect prevents digitization and storage of the event When Anticoincidence is selected a TTL low signal on the GATE input at time of Peak Detect allows the event to be digitized and stored A TTL high signal2. PKD ADC peak detect to reset indicator positive TTL pulse MSB Indicates the Most Significant Bit of MCS address positive TTL pulse ROI Event storage indicator adjustable width positive pulse SCA Single channel analyzer output positive TTL pulse CH SMPLE Sample changer output positive TTL pulse DACA 0 10 V analog output DACB 0 10 V analog output Controls Controls RESET Front panel pushbutton Indicators DT METER Ten segment front panel multicolor LED bar graph ACQUIRE LED Front panel LED COMM BUSY Front panel LED Processor Intel 80C188 10 MHz clock ROM 128K x 8 RAM 64K x 8 data RAM 32K x 8 processor RAM Data Acquisition CHANNELS 16 384 configurable into input sizes of 8192 4096 2048 1024 512 or 256 channels ADC CONVERSION RATE Fully buffered 16 382 channel successive approximation 8 us ADC CONVERSION GAIN 16K 8K 4K 2K 1K 512 256 computer selectable RANGE From 0 to 10 V unipolar or bipolar positive lobe leading RISE TIME 0 5 us to 30 us INTEGRAL NONLINEARITY lt 0 05 over top 99 of range MCS Specifications DIFFERENTIAL NONLINEARITY lt 1 over top 99 of range TEMPERATURE INSTABILITY Gain lt 100 ppm C zero drift lt 50 ppm C of full scale DIGITAL OFFSET Selectable in 256 channel blocks from 256 to 7936 INPUT CONNECTORS Front and rear panel INPUT RATE lt 10 MHz DWELL TI
3. ae ee a ee ae a 5 Creating an MCA Input Definition 0 200000 000000000000 6 The MID Wizard 24 0264 883 os Bee a oe eee Ew RRR ER ew ESR ERE De oS 6 The MCA Input Definition Editor s ecs ens eama ee ee 8 Configuring DMR os ao eee EN a Re a AA 9 The MCA Adjust Screens o e ee a 11 Stabilizer Parameters os os Goa ge dw Bi ar ga Bw we al oe Ges 12 MCS Parameters oe e soerat REE RR epea BR PRE SEER iad pe REE MER ES 13 ADC eee Be a Gis eee aoe es Grey seh oe ee eed Be eds Ets BO Gt 14 Acquire Setup SCreeis sacs Aa ped eee eke Galea a Made eee bane 15 4 Operation 16 Basic Spectroscopy Operations 2 kep tiedet tutn ebsa 16 Gater ote st ene A Gey gente ae ets eto oe ee Bee A re oe 16 Bxt mal Internal Syne sts Ser kd a whe Rk ee ee Kale ee N be ed 16 MGS Mod s sc e cateri 24 ebb whe Ree EER ESSE ee REE EES ODE EES 17 Digital Spectrum Stabilizer Operations lt eos e ec 2 ee aa 17 TAPUtS a a8 be ek ee SOE Ge ie A oo ge Nb eer Se we a as 18 OUIUDUIS ois ie a SA dee aes BS a A ew ee will A ees A AA 18 Controls imac ede ene aoe ea he RR ee da aw a a eH a 19 TIC ators a o ee ace fe an Sere pe ce ee ee oe es Gh ee oe ea do aba 19 PTOCESSO 3 4 base woe a hee OS eK eee eee She ee eRe ee eee A 19 Data Acquisition s a oos 2084 Baek ws a Ba a A Oe A ee ae TE a 19 ADC 1 ose ead de ES es ae a ee OS ee a 19 MCS bbe bh dee ad eb bbe Gee bo ee ee be ae be bebe ed hb be eee bes 20 Eiye Tames Clock ie yet See aid ne
4. at Peak Detect prevents digitization and storage of the event External Internal Sync The EXTSY signal is used to control acquisition and specific behavior depends on ac quisition mode This function is enabled by checking External Start in the MCA Ac quire Setup screen Basic Spectroscopy Operations PHA Mode In PHA mode Data Acquisition must be started first by clicking the Acquire Start button Then a positive TTL Level applied to the EXTSY connector enables data ac quisition and RealTime and LiveTime clocks Note that the EXTSY Input is pulled high internally when no signal is attached which has the same effect enable as a high TTL input signal MCS Mode In MCS mode Data Acquisition must be started first as well Then a positive TTL pulse applied to the EXTSY connector starts the next sweep When no signal is at tached MCS sweeps will stop since the sweeps are triggered on pulse edges MCS Mode Input events are collected through the MCS connector in the form of positive TTL pulses To demonstrate the MCS operation connect the SCA connector to the MCS connector with a short length of BNC coaxial cable This connects the SCA output sig nal from the internal ADC to the MCS input You can set the desired MCS Dwell Time in the MCA Adjust screen page 11 Digital Spectrum Stabilizer Operation The Digital Spectrum Stabilizer is adjusted in the MCA Adjust screen page 11 It corrects for drift in either high resolution
5. placed so that a shift in the reference peak reflects a sig nificant change in count rate in the sampling channels For broad peaks the spacing should be set so that the sampling channels are not on the flat part of the peak Gain Mode Sets the Gain Stabilization mode to Off which disables the Stabilizer or On which enables the Stabilizer The MCA Adjust Screens Centroid and Spacing Relationship Figure 9 shows the relationship between the Stabilizer s Centroid and Spacing on a typical peak for both Zero Stabilization and Gain Stabilization See Stabilizer in Chapter 4 Gamma Acquisition and Analysis of the Genie 2000 Operations Manual for a fuller explanation of how a Stabilizer is used Spacing Centroid Figure 9 Relationship Between Stabilizer Functions MCS Parameters The MCS settings screen Figure 10 for the Multiport contains the following controls Note The MCS Adjust Screen and the associated selection button are available only if MCS was selected as the Acquisition Mode when setting up the MCA controls in the Devices MCA screen of the MID Editor If MCS was not selected the selection button and adjust screen are hidden from view Setup and Configuration Dwell Time Sets the dwell time value C ADC C Stab MOS Figure 10 Adjust Screen s MCS Settings ADC The ADC setting screen Figure 11 for the Multiport contains the following controls This feature is available only for Mult
6. should be discarded by the MCA Output binary data 2 LSB Output binary data 2 2 Output binary data 3 Output binary data 5 Output binary data Output binary data 6 yi 2 2 ne 2 2 Output binary data No connection IEEE 488 Connector IEEE 488 Connector Pin 4 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 24 Signal B1 B2 B3 B4 EOI DAV NRFD NDAC IFC SRQ ATN SHD B5 B6 B7 B8 REN GROUND Description Data input output 1 Data input output 2 Data input output 3 Data input output 4 End or identify Data valid Not ready for data Not data accepted Interface clear Service request Attention Shield Data input output 5 Data input output 6 Data input output 7 Data input output 8 Remote enable Logic Ground 29 Request for Schematics Schematics for this unit are available directly from Canberra Write call or FAX Training and Technical Services Department Canberra Industries 800 Research Parkway Meriden CT 06450 Telephone 800 255 6370 or 203 639 2467 FAX 203 235 1347 If you would like a set of schematics for this unit please provide us with the following information Your Name Your Address Unit s model number Unit s serial number Note Schematics are provided for information only if you service or repair or try to service or repair this unit without Canberra s writt
7. 1 0 0 6 0 1 1 0 0 7 1 1 1 0 0 8 0 0 0 1 0 9 1 0 0 1 0 10 0 1 0 1 0 11 1 1 0 1 0 12 0 0 1 1 0 13 1 0 1 1 0 14 0 1 1 1 0 15 1 1 1 1 0 16 0 0 0 0 1 Factory Setting 0 closed switch 1 open switch Setting the Internal Controls Setting the Internal Controls The Multiport s internal controls are shown in their factory default positions for both the Main Board and the ADC board Main Board Controls efaa aiaiai Connector to Intemal ADC auahia i Sets GPIB 1 to 2 SCA output from SCA of internal ADC factory address 2 to 3 SCA output from Valid Event Conversion Power Source Figure 12 Main Board Controls 3101 1 to 2 DAC A Output Negative 2 to 3 DAC A Output Positive J102 1 to 2 DAC B Output Negative 2 to 3 DAC B Ouiput Positive J501 1 to 2 SCA Output from SCA of the internal ADC 2 to 3 SCA Output from Valid Event Conversion Factory setting 25 Installation and Controls ADC Board Controls 1 to 2 ADC input return grounded jai factory default J101 2 to 3 ADC input return differential w nm 1 to 2 always ae factory use only ADC input signal from ADC in rear panel connector Factory use only J402 000 J01000 OOOCNA41 Figure 13 ADC Board Controls 1 to 2 ADC Input Return Grounded 2 to 3 ADC Input Return Different
8. A definition file Click Open 4 Select Devices ADC and uncheck Digital Stabilizer then check Mixer Router Figure 6 Setup and Configuration ADC for input DETO1 Device Driver Protocol Driver Internal Programmable ADC Multiport IEEE 488 Protocol Dry Control Manual Programmable Internal MCA IV Mixer Router Digital Stabilizer Cancel Help Figure 6 Selecting the Mixer Router 5 Click OK 6 Select Devices MXR and configure the DMR II parameters Figure 7 Select the desired number of inputs 1 2 4 or 8 Group size channels input for each input is set automatically in Genie2000 software by the users selection of MCA full memory size and the number of MXR inputs within the MID editor Mixer Router for input DETO1 Device Driver Protocol Driver IEEE 488 Protocol Driver Control Manual Programmable Internal MCA m Inputs Numb Independent pees Dependent 61 2 c 4 ce Si 02 JV Internal timers Channels Input 16384 Full Memory 16384 Cancel Help Figure 7 The DMR II Parameters 10 The MCA Adjust Screens 7 Click the OK button then save your changes by selecting File Save You will have to manually load this configuration into the Runtime Database for this MCA to be available to Genie 2000 To do this 1 Select File Open then select the Multiport MCA configuration 2 Select Database L
9. Appendix A Specifications on page 18 Creating an MCA Input Definition After you ve installed the Genie 2000 software the first step in using your Multiport is to create an MCA Input Definition MID MID Wizard or MID Editor For most cases you ll use the MID Wizard to help you set up your Multiport s Input Definition quickly and easily If your Input Definition is more complex than the MID Wizard was designed to han dle such as configuring the unit for use with a DMR II Mixer Router you ll need to use the MID Editor page 8 to create your definition The MID Editor is also used to change edit an existing definition The MID Wizard To use the MID Wizard open the Genie 2000 folder and select the MID Wizard icon to start the definition process The MID Wizard Step 1 The first screen Figure 3 lets you select the MCA you want to create a definition for Select the corresponding Multiport model from the list of MCAs MID Setup Wizard Step 1 Figure 3 Selecting the MCA Step 2 The setup screen will ask you to define the GPIB Address and Board Number as shown in Figure 4 By default the Multiport has a GPIB address of 1 See Setting the GPIB Address on page 24 for instructions on changing the address The GPIB Board Number must equal the board number defined for the GPIB board in the GPIB Configuration MID Setup Wizard Step 2 Figure 4 Defining the GPIB Address and Board Number Se
10. DC12 14 19 20 ACEPT 21 ENDATA 22 CDT 23 ENC 24 READY 25 INB 26 ADCOO 27 ADCO1 28 ADCO2 29 ADCO3 30 ADC04 31 ADCO5 32 ADCO6 33 37 28 Rear Panel Connector Pinouts Description Ground Output Output Output Output Output Output Output binary data binary data 2 MSB 7 binary data 8 binary data 10 binary data 11 gt pA O m git Sia yf binary data 12 r2 2 2 binary data 2 jee 2 2 No connection Input Data Accepted Signals the ADC that the data has been accepted by the MCA ACEPT may reset when READY resets handshake Input Enable Data Used to enable the tri state buffers driving the 14 bits of data onto the output lines ADCOO through ADC13 Output Composite Dead Time This signal indicates the time when the ADC or connected amplifier is busy and cannot accept another input event It is used to gate the live time clock circuit in the MCA Input Enable Converter This signal enables or disables the ADC module Logic 1 enables ADC operation Logic 0 prevents the ADC from reopening the linear gate thereby inhibiting further operation Output Data Ready Indicates that data is available for transfer to the MCA READY will be reset after receipt of signal ACEPT Output Inhibit This signal indicates that the data available for transfer to the MCA is invalid and although the data transfer must be completed the data itself
11. Germanium Detectors or a low resolution Nal Detectors This feature is available only for Multiport Models MPT 8E and MPT 16E You can choose to correct zero shift gain shift or both Using a two point stabilization method a high energy peak is monitored for gain drift and a low energy peak is monitored for zero drift The effective gain and zero intercepts of the ADC are adjusted to compensate for drift A Specifications Inputs Outputs LOGIC SIGNALS Rear panel DB 15 connector LOGIC SIGNALS Rear panel DB 15 connector GATE Coincidence or Anti coincidence TTL pulse must occur 2100 ns before peak and remain 230 ns after peak REJ Pile up reject signal positive TTL pulse BSYIN Provides additional deadtime from amplifier positive TTL pulse EXTSY Enable acquisition signal positive TTL pulse internally pulled high MCS MCS input positive TTL pulse duration lt 30 ns rate lt 10 MHz EXTDW External dwell advance positive TTL pulse interval 210 us duration 230 ns latency lt 2 us dead time between channels lt 2 us ADC IN Front and rear panel BNC connector EXT ADC Rear panel DB 37 connector used with MPT EXE only COMMUNICATIONS Rear panel IEEE 488 parallel connector ADC BUSY Internal ADC only Normal dead time control mode OR of Input Discriminator ADC Busy and Extended Busy Correction External dead time control mode uses BSYIN only for dead time control positive TTL pulse
12. ME Internal from 10 us to 60 s external 10 us minimum SYNC Internal or External DEAD TIME 2 us between passes 2 us between channels PRESET 1 to 9 999 999 passes LOGIC INPUTS MCS positive TTL EXTDW positive TTL EXTSY positive TTL rear panel DB 15 connector LOGIC OUTPUT MSB positive TTL rear panel DB 15 connector Live Time Clock Presets 20 RESOLUTION 400 ns ACCUMULATION INTERVAL 10 ms TYPE Live time with reject extension REAL TIME 1 to 9 999 999 seconds SCA LIVE TIME 1 to 9 999 999 seconds ROI INTEGRAL 1 to 9 999 999 counts SCA ZERO 25 of full scale 15 turn front panel potentiometer LLD lt 1 to 105 of full scale 15 turn front panel potentiometer ULD 0 to 105 of full scale 15 turn front panel potentiometer Digital Stabilizer Internal zero and gain stabilization GAIN HPGe Range 3 1 nominal resolution 0 0125 channel nominal at 8192 channels Nal Range 12 5 nominal resolution 0 25 channel nominal ZERO Range 1 5 nominal resolution 0 03 channel nominal External ADC INTERFACE TTL interface cable rear panel DB 37 connector System Requirements COMPUTER Industry standard PC DISPLAY 640 x 480 VGA or 600 x 800 SVGA or higher Power Requirements 24Vdce 30mA 12 V dc 26 mA 21 Specifications 24 V dc 30 mA 12 V dc 140 mA Power consumption 120 V ac 70 mA Physica
13. Multiport Multichannel Analyzer User s Manual 9231564C ISO 9001 SYSTEM C E CERTIFIED Copyright 2000 Packard BioScience Company All rights reserved The material in this manual including all information pictures graphics and text is the property of Packard BioScience Company and is protected by U S copyright laws and international copyright conventions No material in this manual may be reproduced published translated distributed or displayed by any means without written permission from Canberra Industries a division of Packard BioScience Company Canberra Industries 800 Research Parkway Meriden CT 06450 Tel 203 238 2351 FAX 203 235 1347 http www canberra com The information in this manual describes the product as accurately as possible but is subject to change without notice Printed in the United States of America Table of Contents 1 Introduction lt lt sica a a A Model MPT EXE Multiport External ADC Version o o e e 1 Models MPT 8E and MPT 16E Multiport Internal ADC Versions 2 Software Support sex bee ee EO RR REE ER RRO ER DO Ree eae Re Oe eS 2 2 Controls and ComectorS 39 Front Pan l c oa a oe we Body a td ae ale wine y ed 3 Rear Panele anadir ee ee ee eee ee Lee eee whee eee 4 3 Setup and Configuration Installation s sae e a e a e a o a a EEE es 5 Connecting the System se ss w awoke
14. NG NEGLIGENCE STRICT LIABILITY OR OTHERWISE EXCLUSIONS Our warranty does not cover damage to equipment which has been altered or modified without our written permission or damage which has been caused by abuse misuse accident or unusual physical or electrical stress as determined by our Service Personnel We are under no obligation to provide warranty service if adjustment or repair is required because of damage caused by other than ordinary use or if the equipment is serviced or repaired or if an attempt is made to service or repair the equipment by other than our personnel without our prior approval Our warranty does not cover detector damage due to neutrons or heavy charged particles Failure of beryllium carbon composite or polymer windows or of windowless detectors caused by physical or chemical damage from the environment is not covered by warranty We are not responsible for damage sustained in transit You should examine shipments upon receipt for evidence of damage caused in transit If damage is found notify us and the carrier immediately Keep all packages materials and documents including the freight bill invoice and packing list Software License When purchasing our software you have purchased a license to use the software not the software itself Because title to the software remains with us you may not sell distribute or otherwise transfer the software This license allows you to use the software on only one compu
15. ate correctly with either detector type For added flexibility the Multiport supports both pulse height analysis PHA and multichannel scaling MCS modes of operation In MCS mode a single channel ana lyzer SCA output is enabled as well as a SYNC input that allows acquisition to be synchronized by external apparatus Input rates of up to 10 MHz are supported Model MPT EXE Multiport External ADC Version For applications requiring no compromises performance in terms of count rate reso lution and temperature stability the Multiport can be paired with a Model 2060 Digital Signal Processor DSP For applications where requirements are not as stringent but where high performance ADCs are still desirable choose the Model 8701 Wilkinson ADC or the high speed Models 8713 or 8715 fixed dead time ADCs Introduction Models MPT 8E and MPT 16E Multiport Internal ADC Versions Where the convenience of an internal ADC is preferred the Multiport can be obtained in versions with integral 8K or 16K ADC The internal ADC is a fully buffered unit with a fixed dead time of 8 us Conversion gain can be set to 16K MPT 16E only 8K 4K 2K 1K 512 or 256 channels Analog input connections may be made through either front or rear panel BNC connectors Software Support The Multiport is fully supported by Canberra s trend setting Genie 2000 software product family Genie 2000 supports a wide range of time proven spectral analysis al gori
16. ation error in the associ ated dialog box If you select NO a RED error box will appear in the top left corner of the Gamma Acquisition and Analysis window To determine the source of the verification error open the Status Page by clicking MCA Status in the Acquisition and Analysis window The problematic item will be marked with an asterisk Setup and Configuration Each of the following sections describes one of the Multiport parameters that can be changed in the Gamma Acquisition and Analysis GAA application s Adjust dialog To change a parameter click on MCA Adjust in the GAA application s Main Menu then select the radio button for the parameter you want to change Stabilizer Parameters The Stabilizer settings screen Figure 8 for the Multiport contains the following con trols Y Adjust Cabe Stab Ls Prev C On EE 0 E Gain mode Gain centroid Newt on re x ld Gain spacing Ochs 8192 0 LE a Zero mode Figure 8 Adjust Screen s Stabilizer Settings Gain Centroid ESS Sets the centroid in channels of the reference peak at the high end of the spectrum for gain stabilization Zero Centroid Sets the centroid in channels of the reference peak at the low end of the spectrum for zero stabilization Gain or Zero Spacing Sets the spacing in channels between the upper and lower sampling channels The sampling channels should be
17. e MID Editor only for one of these reasons The MCA Input Definition Editor e Selecting the Dwell Time for the MCS mode Note that this parameter is also adjustable within the Gamma Acquisition and Analysis application To select Coincidence Mode and Dead Time Mode for the Models MPT 8E and MPT 16E with internal ADC e To manage multiple Memory Groups which are selectable only from within the MID Editor e Configuring the DMR II Digital Multiplexer Router The editing procedure is described in Editing an MCA Definition in the MCA Input Definition chapter of the Genie 2000 Operations Manual That chapter also has de tailed information on using the MID Editor Configuring a DMR II The DMR II Digital Multiplexer Router is an optional NIM module that allows the Multiport MCA to be used with up to eight independent inputs See the DMR II s User s Manual for information on its capabilities for interconnection diagrams and for details on using it with the Multiport The DMR II cannot be configured using the MID Wizard You will have to use the in teractive MID Editor to configure the DMR II M R for the Multiport MCA Config uring the Multiport MCA using the MID Wizard is outlined in the previous section To configure the DMR II 1 Double click the MID Input Definition Editor icon in your Genie 2000 folder 2 Select Database Unload to unload the Multiport MCA 3 Select File Open to open the Multiport MC
18. e ambient air temperature is between 0 C and 50 C 120 F maximum Perforations in the top and bottom sides permit cooling air to circulate through the module When relay rack mounted along with other heat gen erating equipment adequate clearance should be provided to allow for sufficient air flow through both the perforated top and bottom covers of the NIM Bin Connecting the System Using the IEEE 488 cable connect the GPIB interface cable to the Multiport s IEEE 488 interface port and the other end of the cable to the interface port of the Host Computer s GPIB card This provides the communication between Multiport and the host computer For field installation instructions for the Multiport board refer to Appendix B Installing the IEEE 488 Board on page 23 Model MPT EXE Connect the supplied ribbon cable between the external ADC s DATA connector to the MPT EXE s EXT ADC connecter PB 37 Models MPT 8E and MPT 16E Connect a standard BNC cable between the Multiport s ADC IN connector and the amplifier s Output signal connector This provides the signal from the amplifier to the Multiport s internal ADC Note that this connector is not used with the Model MPT EXE Multiport which uses an external ADC Setup and Configuration I O Optional external signals on this port are connected through the supplied 14 lead cable Each lead is labeled Descriptions of these signals can be found under Inputs and Outputs in
19. en permission you may void your warranty p A CANBERRA Warranty Canberra s product warranty covers hardware and software shipped to customers within the United States For hardware and software shipped outside the United States a similar warranty is provided by Canberra s local representative DOMESTIC WARRANTY Canberra we us our warrants to the customer you your that equipment manufactured by us shall be free from defects in materials and workmanship under normal use for a period of one 1 year from the date of shipment We warrant proper operation of our software only when used with software and hardware supplied by us and warrant that our software media shall be free from defects for a period of 90 days from the date of shipment If defects are discovered within 90 days of receipt of an order we will pay for shipping costs incurred in connection with the return of the equipment If defects are discovered after the first 90 days all shipping insurance and other costs shall be borne by you LIMITATIONS EXCEPT AS SET FORTH HEREIN NO OTHER WARRANTIES WHETHER STATUTORY WRITTEN ORAL EXPRESSED IMPLIED INCLUDING WITHOUT LIMITATION THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR OTHERWISE SHALL APPLY IN NO EVENT SHALL CANBERRA HAVE ANY LIABILITY FOR ANY SPECIAL INDIRECT OR CONSEQUENTIAL LOSSES OR DAMAGES OF ANY NATURE WHATSOEVER WHETHER AS A RESULT OF BREACH OF CONTRACT TORT LIABILITY INCLUDI
20. ial J301 1 to 2 ALWAYS factory use only Factory setting J101 C Rear Panel Connector Pinouts I O Connector Pin oO Oo N OD 10 11 12 13 14 15 Signal SCA ADC BSY CHSMPL PKD MSB ROI DACA DACB BSYIN GATE REJ MCS EXTDW EXTSY GROUND Description Single channel analyzer output positive TTL pulse Internal ADC only Normal dead time control mode OR of Input Discriminator ADC Busy and Extended Busy Correction External dead time control mode uses BSYIN only for dead time control positive TTL pulse Sample changer output positive TTL pulse ADC peak detect to reset indicator positive TTL pulse Indicates the Most Significant Bit of MCS address positive TTL pulse Event storage indicator adjustable width positive pulse 0 10 V analog output 0 10 V analog output Provides additional deadtime from amplifier positive TTL pulse Coincidence or Anti coincidence TTL pulse must occur gt 100 ns before peak and remain gt 30 ns after peak Pile up reject signal positive TTL pulse MCS input positive TTL pulse duration lt 30 ns rate lt 10 MHz External dwell advance positive TTL pulse interval gt 10 us duration 230 ns latency lt 2 us dead time between channels lt 2 us Enable acquisition signal positive TTL pulse internally pulled high Ground 27 DMR Connector Pin Signal 1 6 Gnd 7 ADC13 8 ADCO7 9 ADCO8 10 ADCO9 11 ADC10 12 ADC11 13 A
21. iport s rear panel connectors For more detailed information refer to Appendix A Specifications MPT 8E amp MPT 16E IEEE 488 MADE IN USA ES 1 0 Connector for auxiliary I O signals ADC IN Accepts positive unipolar or bipolar positive lobe leading pulses for PHA or pulses for MCS mode EXT ADC Connects Multiport to an External ADC DMR Connects Multiport to a Digital Multiplexer Router IEEE 488 Port for IEEE 488 communication with host computer BIN POWER Accepts power from the NIM Bin Figure 2 Rear Panel Connectors MPT EXE IEEE 488 MADE IN USA 3 Setup and Configuration This chapter will guide you through to connecting and setting up the system Installation The Canberra Model 2100 Bin and Power Supply or other bin and power supply sys tems conforming to the mechanical and electrical standards set by DOE ER 00457T will accommodate the Multiport MCA The module s right side cover acts as a guide for insertion of the instrument The module is secured by turning the two front panel captive screws clockwise until finger tight It is recommended that the NIM bin power switch be OFF whenever the module is installed or removed To ensure safety be sure to use a NIM Bin which complies with all applicable safety requirements The Multiport can be operated where th
22. iport Models MPT 8E and MPT 16E i C ADC Stab Offset hgoinc mode LTC PUR sig C In oe Off AntiCo Coincidence Figure 11 Adjust Screen s ADC Settings Offset Sets the ADC s digital offset in channels Coinc Mode Sets the coincidence mode for the extended Gate signal when external gating is used LTC PUR Sig Select Int PUR LTC to enable the internal live time correction and pileup rejection circuitry Acquire Setup Screen Select Off Ext PUR to disable the internal live time correction and pileup rejection circuitry In this mode an external live time dead time signal is required via the BSY DWL input Acquire Setup Screen The Gamma Acquisition and Analysis application s Acquire Setup Screen is described in detail in the Genie 2000 Operations Manual However the External Start option on this screen is of particular significance at this time Checking External Start enables Multiport s External Sync function which works in conjunction with the EXTSY signal at the rear panel I O port In PHA mode a positive TTL level enables data acquisition and the Real Time and Live Time clocks In MCS mode a positive TTL pulse starts restarts a sweep 4 Operation The Multiport is supplied from the factory ready for normal pulse height analysis PHA operation The only external connections required are an IEEE 488 interface cable to the computer and the ADC input signal from a shaping amplifier
23. l SIZE Standard double width NIM module 6 86 x 22 12 cm 2 70 x 8 71 in per DOE ER 0457T NET WEIGHT 1 7 kg 3 8 Ib SHIPPING WEIGHT 2 1 kg 4 6 Ib Environmental OPERATING TEMPERATURE 0 to 50 C OPERATING HUMIDITY 0 80 relative non condensing Ordering Information MPT EXE 16K Multiport for use with external Canberra ADC MPT 8E 8K Multiport with internal 8 us ADC MPT 16E 16K Multiport with internal 8 us ADC Requires Genie 2000 software sold separately 22 B Installation and Controls Installing the GPIB IEEE 488 Card The GPIB General Purpose Interface Bus communication card and software may be installed in the host computer by using the procedures in the applicable National In struments manual National Instruments Model AT GPIB TNT and PCI GPIB cards are recommended and are available from National Instruments or through Canberra Follow installation and configuration instructions in the corresponding GPIB Card in stallation manual In most cases the default configuration settings are sufficient How ever the following settings will work Note that not all GPIB card models will display each of these settings during configuration Switch Setting Primary GPIB Address 0 Secondary GPIB Address None Base I O Address Interrupt Request DMA channel None Bus Timing 500 ns Cable Length for High Speed Disabled System Controller Yes 1 O Timeout 10 sec Parallel P
24. n for use with an external Canberra ADC Host computer interfacing is accomplished via an industry standard IEEE 488 parallel interface The widely accepted IEEE 488 interface makes the Multiport compatible with a wide variety of computer platforms IEEE 488 interface boards are available in ISA EISA and PCI bus form factors so the Multiport user need not worry about compatibility as computer bus standards evolve Also up to 15 Multiport units can be controlled from a single IEEE interface so a Multiport system does not consume more than a single PC slot By keeping all sensitive components out of the computer itself Multiport provides better performance and lower noise than plug in card based MCAs but at comparable prices Multiport is suitable for use with a wide range of radiation detectors Selecting a proper preamplifier amplifier and high voltage power supply makes Multiport com patible with Nal TD HPGe SiLi CdTe Ion Implanted Plastic scintillation BGO and other detector technologies Modular NIM packaging makes it easy to reconfigure sys tems as needs change or as new technologies become available A two point digital stabilizer is included to ensure system stability under a range of count rates and temperature variations Gain and zero stabilization are independently controlled to lock on high and low energy peaks respectively in the spectrum Sepa rate ranges for HPGe and Nal detectors ensure that stabilizer will oper
25. oad To to select the runtime configuration that will be used to access this MCA 3 Close the MID editor The MCA Adjust Screens The MCA Adjust Screens which are accessed from the Gamma Acquisition and Analysis application s Menu Bar allow you to adjust the Multiport s programmable controls As adjustments are made in the dialog box the new values are sent to the Multiport To save the adjustments to the datasource s CAM file use the Gamma Acquisition and Analysis application s File Save command so that the next time this datasource is se lected the proper setting will be loaded into the Multiport The Next and Prev ious buttons at the left side of the Adjust screen are used to move to the next or previous page of the controls when there are more control elements than will fit in the basic box To access the Adjust screens a Multiport datasource must have been opened To open select File Open Datasource then select Detector in the Type box Next select the datasource file and click on open Note If you get a Required Hardware Unavailable error possible causes are selecting the wrong datasource for the instrument a problem with the IEEE 488 communication interface check the cable or the NIM Bin power is off If you get a Hardware Verification Error there is a mismatch be tween the MID Definition setup and the hardware configuration You can choose to accept or not accept the verific
26. oll Duration Default Enable Auto Serial Polling Yes Enable CIC Protocol No Assert REN when SC No Terminate Read on EOS No Set EOI with EOS on Write No 8 bit EOS Compare No Send EOI at end of Write Yes EOS byte 0 The Base I O Address and Interrupt Request IRQ are not specified because they may have to be set individually for existing hardware and software 23 Installation and Controls Setting the Multiport s GPIB Address 24 The Multiport s GPIB address is set by internal switch SW101 a six position dip switch located at the bottom of the module near the front panel refer to Figure 12 Main Board Controls on page 25 Switches 1 5 determine the GPIB address setting Each device on a bus must have a unique GPIB address Therefore if there are several Multiports on the same bus or another device with GPIB address 1 the Multiport s address may need to be changed Use the following switch table as a guide Note that address 0 is reserved for the IEEE 488 communication card in the computer As many as 16 Multiports may be operated from a single GPIB card Note that the Base I O Address and Interrupt Level IRQL may depend on existing hardware so you must determine the available Address and IRQL for your system GPIB Address vs Switch Settings Ar SW SW2 SW SW4 SWS 1 1 0 0 0 o 2 0 1 0 0 0 3 1 1 0 0 0 4 0 0 1 0 0 5 1 0
27. se fe te as Ser ae dg ee Se se 20 PEN 2 4 4 GSW a G HY Oe ae Pale A OH ee EERE Oo ORO a 20 SCAS ese eB Gee ig bora aida a Gate tes Aah Bo ee Be a a a EN Ga 21 Digital Stabilizers oir 6 4B eB eee ee aed A a ee Be woe 21 External ADC sa co ee 44a 404 be BORE ewe a MODE EES 21 System Requirements ss sa 2 a ak a E aa a e a d e aeaa a e p i a 21 Power Requirements o o w S eda dee SG aS e a eo eR heee EER RR Ee SS 21 PhysiCaler coins eh ee Oe OP Eda Oe ERE ESE E Oe ee Oe oe Ewe ee RES 22 Environmental ocios msj eee Eee ae ee Re ek e S aa 22 Ordering Information s acs aoe rea e Ew A Se 22 Installation and Controls lt lt lt 23 Installing the GPIB IEEE 488 Card o ee ee 23 Setting the Multiport s GPIB Address 2 2 ee 24 Setting the Internal C ntrolS ssc esse der eea apee ee a S 25 Main Board Controls ee 25 ADC Board Controls ecesas 048 bee Gee iea SER EAR ER EDS aa SS 26 Rear Panel Connector Pinouts lt 27 O Comectot 6 4 0 2 beet ewe whee eee ewe LAE ED eS CHE OED EHS 27 DMR Connector e huido a a ae ee ew ety Be be ed hh Bad eo ae 28 TEEE 488 Commector ee es 29 1 Introduction The Multiport MCA meets the need for a cost effective mid performance general pur pose Multichannel Analyzer Packaged in a convenient double wide NIM module the Multiport is available in three versions 8K and 16K units with internal ADC and a 16K versio
28. ter at a time You must get our written permission for any exception to this limited license BACKUP COPIES Our software is protected by United States Copyright Law and by International Copyright Treaties You have our express permission to make one archival copy of the software for backup protection You may not copy our software or any part of it for any other purpose Revised 01 00
29. thms modern spectrum display and user interface as well as a variety of special applications programs Genie 2000 software solutions are available for applications ranging as widely as laboratory gamma and alpha spectroscopy waste measurement whole body counting and nuclear safeguards 2 Controls and Connectors Front Panel This is a brief description of the Multiport s front panel controls and connectors For more detailed information refer to Appendix A Specifications MPT 8E amp MPT 16E MPT EXE J PCA Multiport o PCA Multiport Multichannel Analyzer Multichannel Analyzer DEADTIME 10 20 30 40 50 60 70 80 90 100 DEAD TIME Displays the converter s average COM BUSY dead time in gt Indicates communication incrementsof 10 between Multiport and ACQUIRE RESET host computer ACQUIRE RESET e O LLD Sets the Lower Level ACQUIRE Discriminator for the Indicates data minimum input acquisition in progress acceptance voltage RESET Resets Multiport in event of communication failure ZERO Spectral data is left intact Sets the input analog zero level ULD Sets the Upper Level Discriminator for the maximum input acceptance voltage ADC IN Accepts positive unipolar or bipolar positive lobe leading pulses for PHA or pulses for MCS mode Figure 1 Front Panel Controls and Connectors Rear Panel Controls and Connectors This is a brief description of the Mult
30. tup and Configuration Step 3 The Step 3 screen in Figure 5 asks for a Detector Type and acquisition memory size in channels and requires that an Input Name be entered For Multiport models with an internal ADC the maximum selectable memory size is limited by the ADC s maxi mum conversion gain MID Setup Wizard Step 6 Input Name r Number of Channels mem Detector Type Ge bed Kl Finish Cancel Help Figure 5 Assigning the Detector Type Ending the Definition To complete your Input Definition select Finish The input that you just defined will be stored as an MID file named inputname MID and automatically loaded into the Genie 2000 s MCA Runtime Configuration Database described in Using MCA Defi nition Tables in Chapter 3 MCA Input Definition of the Genie 2000 Operations Manual When you select Finish you will be asked if you would like to define an other input Answering No will close the Wizard Note that if you didn t enter an Input Name you won t be allowed to exit the Step 3 screen If the name you entered is the same as the name of an existing MID file the system will tell you so and go back to Step 3 to let you enter another name The MCA Input Definition Editor Most users will not need to use the MCA Input Definition MID Editor which allows you to create edit and manage input definitions For most users the facilities provided in the MID Wizard are sufficient You ll have to use th
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