BNC588 - DAQ Plone Site
Contents
1. Setting the Clock Source and Internal Rate Source Selects the internal or external clock source from which the unit will operate Per Sets the T period which determines the fundamental output frequency of the unit Setting the Output Reference Ref Out Selects the frequency of the output reference for syn chronizing with external system components 19 System Menu Comm Comm Keypad Misc Parameters Parameters Parameters Parameters Interface RS232 Interface USB Key Repeat Rate Auto Start Baud Rate Po Key Volume Decimal Mark Echo Enable Po Knob Volume LCD Brightness Setting System Communication Parameters The 588 comes with a standard RS232 serial port and USB port The unit will not respond to computer commands unless these ports are properly configured Interface RS232 USB Etherenet optional Baud Rate Selects the baud rate for the selected interface Echo Selects whether to echo characters back to the host computer or not Address Sets the GPIB address Setting Keypad Parameters The rate at which a key will repeat itself when held down may be set This can be used to provide a controlled rate at which a parameter is incremented In addition the volume of the beep can be controlled for both the keypad and the adjustable knob Key Rate Sets the rate at which the keys will repeat when held down Key Vol Sets the beep volume for the keypad Setting the Auto Start Mode The unit may be configured2. TO CHA CHB CHC CHD etc New Selects the Sync source MUX n mericvalugs New Selects which timers are enabled as output for the current channel Sets the polarity of the pulse For NORMal NORMal operation the second nominal state is more POLarity COMPlIement positive than the first COMPlement and INVerted INVerted are aliases For both the second state is more negative than the first OUTPut eel alem Contains command to control output NORMal SINGIe Channel Mode Sets the channel pulse series BURSt output mode DCYCle BCOunter zn meticvaltios New Burst Counter Sets the number of pulses to generate when channel is in the BURST mode Pulse Counter Sets the number of pulses to PCOunter lt numeric value gt generate during the on cycle of the Duty Cycle Mode Off Counter Number of pulses to inhibit output during the off cycle of the Duty Cycle mode OC Ounter lt numeric value gt Sets the number of To pulses to delay until enabling WCOunter lt numeric value gt output PULSE1 n Sets Channel Gate Mode Disable pulse inhibit output inhibit Global Gate Mode must be set to CHAN for this command to be available DIS PULS OUTP Sets Channel Gate Logic level Active low or LOW HIGH active high Global Gate Mode must be set to CHAN for this command to be available 40 588 SCPI Command Summary Std Keyword Parameter New Comments Seen Sie SSS
3. Ethernet Interace Overview An Ethernet interface is optional on the 588 When this option is chosen the USB port is replaced by the Ethernet port The Ethernet module used is a Digi Connect ME module supplied by Digi Connectware Inc There are several ways to successfully communicate with the pulse generator over Ethernet The two most popular methods are raw TCP IP such as Labview or programming with VISA libraries and by mapping a pc COM port using the Digi Connectware s Realport Drivers Whatever method of Ethernet communication is ultimately desired the utilities supplied by Digi Connectware included on the cd shipped with the Ethernet option Pulse Generator will be critical to implementing the communications Please install the following utilities Ethernet Communication Notes The Digi Connectware s Digi Device Discovery can be used to determine what IP address was assigned by the local DHCP server if any e Digi Device Discovery can also be used to open a web interface to the Ethernet module Simply double click on the IP address that is displayed in the Digi Device Discovery utility Username root Password dbps e famapped COM portis the desired communication method the Digi Connectware s Realport Drivers setup must be used to install the COM port on the pc The virtual COM port is then local to the computer it was installed on Please refer to the Digi Connectware Documentation supplied on the
4. UPDate New Query only Forces update of display Use when mode is false BRIGhtness numeric value New Como ala pi display Range SO where 0 is off and 4 is full intensity IEEE 488 2 Common Commands Mnemonic Command Name Parameters Comments MNT Queries the Pulse Generator Identification IDN Su en The ID will be in the following format y model channels option version Restores the state of the Pulse Generator from a copy stored in local nonvolatile memory 0 through 12 are valid memory blocks Beset Command NENNEN bun the Pulse Generator to the default RCL Recall Command numeric value Stores the current state of the Pulse SAV Save Command lt numeric value Generator in local nonvolatile memory 1 through 12 are valid memory blocks Generates a software trigger pulse TRG Trigger Operation is the same as receiving an external trigger pulse Query Form returns the label of the last saved or recalled configuration ag Setup Label Sing valias Command Form sets the label string for the next sav command String must be in double quotes 14 characters max 42 Appendix 43 Appendix A Specifications 588 Specifications Pulse Generation RANGE DELAY 0 1000s WIDTH 10ns 1000s RESOLUTION 250ps TIMEBASE 50MHz TIMEBASE ACCURACY 25PPM INTERNAL RATE GENERATOR RATE 0 0002Hz to 20 000MHz RESOLUTION 10ns ACCURACY Same as timebase JITTER 50ps SETTLI
5. lt lf gt Will return NORM lt cr gt lt lf gt SCPI Keyword Separator Acolon must always separate one keyword from the next lower level key word Aspace must be used to separate the keyword header from the first parameter If more than one parameter is used you must separate subsequent parameters with acomma SCPI Optional Keywords Optional keywords and or parameters appear in square brackets in the command syntax Note that the brackets are not part of the command and should not be sent to the pulse generator When sending a second level key word without the optional keyword the pulse generator assumes that you intend to use the optional keyword and responds as if it had been sent SCPI Specific and Implied Channel Some commands such as PULSe allow specifying a channel with an optional numeric keyword suffix The suffix will be shown in square brackets 1 2 The brackets are not part of command and are not to be sent to the pulse generator The numeric parameters correspond to the following channels 0 To 1 ChA 2 ChB etc Only one channel may be specified at a time If you do not specify the channel number the implied channel is specified by the INSTrument SELect command or the last referenced channel 36 After power up or reset RST The instrument default is channel 1 SCPI Parameter Types The following parameter types are used lt numeric value gt Accepts all commonly used decimal represent
6. replaced by V and Hz as in 230V 50Hz DO NOT USE Vac IEC 417 No 5033 Both direct and alternating current IEC 617 2 No 02 02 06 Three phase alternating current IEC 417 No 5017 Earth ground terminal Primarily used for functional earth terminals which are generally associated with test and measurement circuits These terminals are not for safety earthing purposes but provide an earth reference point IEC 417 No 5019 Protective conductor terminal This symbol is specifically reserved for the protective conductor terminal and no other It is placed at the equipment earthing point and is mandatory for all grounded equipment IEC 417 No 5020 Frame or chassis terminal Used for points other than protective conductor and functional earth terminals where there is a connection to accessible conductive terminals to advise the user of a chassis connection 47 48 IEC 417 No 5021 Equipotentiality Used in applications where it is important to indicate to the operator that two or more accessible functional earth terminals or points are equipotential More for functional rather than for safety purposes IEC 417 No 5007 On Supply Note that this symbol is a bar normally applied in the vertical orientation It is not the number 1 IEC 417 No 5008 Off Supply Note that this symbol is a true circle It is not the number 0 or the letter O IEC 417 No 5172 Equipment protected by double insulation or reinfo
7. 10 Enable Disable Channel UE uus ueni debi pvExdU IRR DER a IMEEM MED PI MEE 10 Re rming the Channel K E I ue ere epos dra dite Dh NV ASPIRE EU TE a MEDIO i ut n pae 10 Setting Pulse Timing Parameters de Eee FREUE eae 10 pete Pulse Output Para nie ere c o naso Vr Ex es EEOE Y FE HU ELMO MEO priu Sup v vM FU I PNIS aian 11 Using the Output Multiplexer idiom ete pe bris tort baia d shud EE bURVPQ EVER ER SEL e Epis o budebn abes 11 Setting System Mternal Mate x shsecicccctcsaseavaaticeecesavasinis DAS MEN a E S S MADDEN MS 11 A 0589 MENS dereie VEI a LO 588 Menu SEIPHOLER ascents nemesis 14 ovstem Mode VM E L TTT TTT 16 Setting System Mode of Operation 2 2 5 5 9 eee 16 Channel WEST TTT 16 Emabling Channel Out pitts disianansaininuiiiieicsd lee 17 Setting the Channel Timing Parameters cesses sese eee 17 Setting Pulse Output Configuration 5 bu esse eee eee 17 Setting Pulse Mode ol Opera ti ns S ai p isa Ev nirisan i a aE E ai 17 Delaying the Start of Channel Output sss sese 17 Configuring the Channel Multiplexer sss esse seene 17 Advanced Channel Menus ssssssirsssssssrsssrossraseecoosesssssossssstsesesasisesissesisasisasisastsasisis sidisis 18 petung the Syne idu PB keniensis E e NIME SE I ET DEI MIU 18 Setting Channel Gate Controls sese ats esen 18 Gate TTT 18 Enabling System Gate ose cio HER EDIDI NON T ERR POS Htm qub SIONIS QU MOREM SUMI XN UNE 19 Tris Moni usd UV MIEL D LEA c ee 19 Enabling System TIIESGE ioci ppie Roe NUM nM
8. COMMunicate SERial USB n where n can be 0 4800 9600 19200 38400 default 57600 115200 GO GO GO O O USB 1 0 specification is used The USB cable can be removed without unplugging the device in the operating system environment Echo functionality is not available on the USB port Ethernet Interface Overview An Ethernet interface is optional on the 588 33 The Ethernet module used is a Digi Connect ME module supplied by Digi Connectware Inc There are several ways to successfully communicate with the pulse generator over Ethernet The two most popular methods are raw TCP IP such as Labview or programming with VISA libraries and by mapping a pc COM port using the Digi Connectware s Realport Drivers Whatever method of Ethernet communication is ultimately desired the utilities supplied by Digi Connectware included on the cd shipped with the Ethernet option pulse generator will be critical to mplementing the communications Please install these utilities Ethernet communication notes The Digi Connectware s Digi Device Discovery can be used to determine what IP address was assigned by the local DHCP server if any Digi Device Discovery can also be used to open a web interface to the Ethernet module Simply double click on the IP address that is displayed in the Digi Device Discovery utility 0 Username root 0 Password dbps If a mapped COM port is the desired communication m
9. Channel A timer with the Channel B timer adjusting each timer to provide the necessary pulses Dependent amp Independent Timing Events The 588 allows the user to control the relationship between the Channel Timers by setting the sync source for each timer Independent events are all timed relative to the internal T start pulse Dependent events may be linked together by setting the sync source to the controlling event This allows the instrument to match the timed events and adjustments can be made in one event without detuning the timing between it and a dependent event Navigating the 588 Front Panel Selecting Menus Parameters are grouped in menus selectable using the function keys To select the output channel parameters press the letter key corresponding to the desired channel Menus may include a number of different pages each page containing up to four parameters The status block in the upper left corner of the display shows a vertical arrow if the current menu contains addtional pages Press the Page button to select the next page There may be multiple channel menus depending upon your unit Secondary menus can be accessed by press ing the letter key of that channel a second time There are also individual menu keys for the gate GATE trigger TRIG and system MENU menus Depending upon your unit each of these menus may have multiple pages accessed by the Page button or secondary menus ac cessed by pressing that part
10. Select active high or active low Pressing the RUN STOP key will arm the unit Once the unit is armed it will begin generating pulses whenever the external gate input is in the active state Pressing the RUN STOP key a second time will disarm the unit 30 Programming the 588 31 Programming the 588 Personal Computer to Pulse Generator Communication The 588 comes standard with an RS232 serial and USB interface An Ethernet interface is available as an option All menu settings can be set and retrieved over the computer interface using a simple command language The command set is structured to be consistent with the Standard Commands for Program mable Instruments Although due to the high number of special features found in the 588 many of the commands are not included in the specification The syntax is the same for all interfaces RS232 Interface Overview The serial port is located on the back of the 588 and uses a 9 pin D type con nector with the following pinout as viewed from the back of the unit No Connection Tx Transmit to computer Rx Receive from computer DTR Connected to pin 6 Ground DSR connected to pin 4 RTS connected to pin 8 CTS connected to pin 7 No Connection GO 0 lO Qn E GM The serial port parameters should be set as follows Baud Rate 4800 9600 19200 38400 57600 115200 default Data Bits 8 Parity None Stop Bits 1 The default baud rate for the RS232 is 115200 USB
11. as a non retriggerable delayed one shot pulse generator This means that the timer will only generate one delayed pulse for every start pulse received Once the channel timer has started counting addi tional start pulses will be ignored until the pulse has been completed non retriggerable The start pulse for each channel is provided by the internal T pulse generated by the Internal System Timer Whether or not a pulse is gener ated for each T pulse is determined by the Channel Mode Generator Standard modes include Normal A pulse is generated for each T pulse e Single Shot One pulse is generated at the first T pulse after which output is inhibited Burst A pulse is generated for each T pulse n times after which output is inhibited e Duty Cycle n pulses are generated for each T pulse after which the output is inhibited for m times The cycle is then repeated Different modes may be selected for each output allowing a wide variety of output combinations Each output may also be independently disabled or gated using the external gate input Output Multiplexer The output of the Channel Timers are routed to a set of multiplexers This allows routing of any or all Channel Timers to any or all of the unit outputs In the normal mode of operation the output of the nth Channel Timer is routed to the Tnth output connector As an example if a double pulse is required on Channel A output one can multiplex the
12. 0 respectively hex OxOD and 0x0A All command strings need to have these characters appended When the pulse generator responds to a command whether it is a query ora parameter change it also appends its return strings with these characters Coded applications could use this behavior to know when to stop reading from the unit However if the echo parameter is enabled there will be two sets of line terminators one following the echoed command string and one following the pulse generator s response Note The pulse generator will echo commands on the DB9 serial port only The pulse generator responds to every communication string If the communica tion string is a query the unit responds with the queried response or error code followed by the line terminators If the communication string is a parameter change the response is ok or error code followed by the line terminators For this reason it is not recommended that multiple commands be stacked together into single strings as is common with some other types of instruments It is recommended that the coded application send a single command in a string and follow immediately by reading the response from the unit Repeat this sequence for multiple commands IEEE 488 2 Common Command Format The IEEE 488 2 Common Commands control and manage generic system functions such as reset configuration storage and identification Common commands always begin with the asterisk c
13. BNC 588 Series Pulse Generator Operating Manual Berkeley Nucleonics Corp 2955 Kerner Blvd San Rafael CA 94901 415 453 9955 phone 415 453 9956 fax www berkeleynucleonics com rev 3 0 Contents 1 Introduction cccecsccccccccccccccccccccccccccccscccccsccececeecs L Technical SUpport TTT 2 US y oaa aa S EE EE N AE OEE Ea EEAS 2 Package Contento sciens nananana ea EE iot Dum Dh a PIU DR SD tas er Dun EEES 2 Ete tM ga c nana SANTA REDI NEMO Md MRNA A MUR tad MM LU epp URN MTM UE 3 2 Front Panel Overview ee eeeee eee eene eee eoeeeses D 585 Front Pane Yard EXE XY REY YEERE EVE YF E Y EUN ESENE VETEST M VE NO SEENE FEE ain 6 Display Layout and Indicator Sa sss uiessevauunth uius eua YpUE UEM eiNU E oS a E due V eO ma BUDE 6 Description of Front Panel Area 422b see Ero pir REI QE RA a r DU PUER AMD DUE 6 fe seo a DC ME ra ILIUM MM M eee I IM BUE 6 3 Pulse Concepts amp Pulse Generator Operation 7 Counter Architecture Overview esse sees eee 8 System Timer EEE ae 8 Channel Timer E sooo T 9 JO Tens Multiplexer TTT 9 Dependent amp Independent Timing Events sss 9 Navigating the 588 Front Panel sesssssssseeceoeoecccsesssseseeeecocsssssesseeeeeeeeosssssseeeeeesseeeoe 9 Selecting ETT 9 Selecting Menu L T 10 Numeric Input VIode T 10 Entering Non Numeric Parameters ies eee eee 10 Alphanumeric Input Mode T 10 Enaplns System OUDID oops u a Senat mda md vds d a Edu uU S QUEM Ive UU UN DXN UD
14. CD or call Berkeley Nucleonics Technical Support e The pulse generator s SCPI parameter SYSTem COMMunicate SERial USB n is defaulted to 115200 and should not be changed for Ethernet communication whether or not a mapped COM port is used The virtual COM port on the pc should be set to 115200 BAUD e Echo functionality is not available on the Ethernet port 50 Programming Command Types and Format The 588 pulse generator uses two types of programming commands IEEE 488 2 Common Commands and Standard Commands for Programmable Instruments SCPI The format is the same for all interfaces Hyperterminal in Windows or any other generic terminal program may be used to interactively test the commands using the RS232 interface 51 Appendix D Ethernet Connectivity IP Address and Raw TCP IP Connection This document describes one of the most popular methods of setting up Ethernet communication for the Berkeley Nucleonics pulse generators The method discussed is Raw TCP IP communication The Ethernet module used in Berkeley Nucleonics pulse generators is a Digi Connect ME device manufactured by Digi International Inc It supports virtually all practical Ethernet communication methods A set of utilities and documenta tion by Digi is included on the CD shipped with the pulse generator This discussion assumes that the Digi utilities included with your pulse generator and National Instruments VISA version 3 3 in this procedu
15. Duty Cycle Mode Off Sets the number of pulses to inhibit before repeating the On Cycle in Duty Cycle Mode Delaying the Start of Channel Output Within any channel mode the output of the channel can be delayed using the wait parameter within the CHANNEL menu Wait Sets the number of T pulses to wait until enabling the channel output Configuring the Channel Multiplexer To define which channels are fed into the channel multiplexer the corresponding bit for the desired channel to add should be setto 1 All desired omitted chan nels should have the corresponding bit set to O 17 Mux Enable disable bitfield Advanced Channel Menus Advanced Timing Channel Gated Operation Channel Gated Operation Parameters uS Channel Enable Channel Enable SyncSource Gate Enable Disabled Gate Enable method Gate Polarity Setting the Sync Source Although each channel receives its start pulse from the internal T pulse logically the start pulse can be assigned such that the delay entered is relative to the T pulse or any other channel pulse This allows dependent events to link The unit will not allow a circular chain of sync sources that would result in a channel triggering itself The delay entered is relative to the selected sync source Sync Source Selects the channel sync source Setting Channel Gate Control When the global gate is set Chan Menu the channel can then use the gate input with independen
16. Hrcbl9bkss eive 222 tiniban aissos issedk inr iir inei RE Si 26 To Use Channel Single Shot Function sss essen eenn 27 To Use Channel Burst Mode Mamet sss 2d To Use the Channel Duty Cycle Function sss sss sees 27 To Use the Channel Gating Function esse ee 28 External Input Overview esssssssssseeecceccecccsssssseeceecccoeccosssseeeeeeecsossssesssseeeeecccssssseeeeeeee 28 To Generate a Pulse on Every Trigger Input sss sese 28 To Generate a Burst of Pulses on Every Trigger Input sss sese 29 To Start a Continuous Stream of Pulses Using the External Trigger 29 To use the External Gate to Control the System sss 30 6 Programming the 588 eeeeeeeeeeeee nse OL Personal Computer to Pulse Generator Communication 32 E5232 Interface OvervieW sss sss sees sss essen nanna ennan 32 USB Interface Overview sese anana aaaea aaaea aaaea 32 Ethernet Interface Overview sss sss sss ssa anana anana aaaea aa 34 Programming Command Types and Format 34 Lane TermnibndbtrOl uem oii n BEFFU ROT YI EENNSR NULLE VINEA ERR NNNM RERO Esse resset tissi 34 IEEE 488 2 Common Command Format sss 35 SCPI Command Keywords 6 p racrsaeiSEUN E Vept REIR Opa ennenen 35 SCPI Command Format ssssssssssssssss sss esse sss essen MIA REEF IIR TUI ME 36 CU T T 36 SCPI Keyword Separator sss sss sss sss sss esse enesenn nanna annee 36 SCPI Optional
17. Interface Overview The USB interface is standard on the 588 Before this type of communication can be used the appropriate drivers must be installed on the personal computer pc These drivers are included on the cd that was shipped with your unit Please contact Berkeley Nucleonics or visit www berkeleynucleonics com for updated installation files and instructions USB communication is achieved by using a mapped virtual COM port on the pc The driver installation executable will obtain an unused COM port number 32 install the USB drivers and make that COM port number available for typical RS232 communication to the pulse generator Hyperterminal or other common software may be used When communicating through the mapped COM port over USB the baud rate for the communication port used by the USB chip must match the baud rate for the COM port on the pc Access to the USB port baud rate is done using the SCPI command SYSTem COMMunicate SERial USB n command where n is the desired communication speed This parameter can be accessed via any communication method The default buad rate for USB is 38400 USB communication notes The correct drivers must be installed on the personal computer before communication can be accomplished via USB The BAUD rates on the pc and on the pulse generator must match for successful communication The USB port s BAUD rate on the pulse generator can be set using the SCPI command SYSTem
18. Kevwordsa ssssss sss essen nnan nenen ennn 36 SCPI Specific and Implied Channel ccce eese eee eene 36 SCPI Parameter TyDBSeciusvese pneus hu o EFFI QUE ENERRS nanna ORI COO NEUE 37 Error T lT 37 Programming Examples sss sss sese sss sss seene neeaae 37 588 SCPI Command Summary ssicccciccsscscicccstssacecassecsssianscsecestsassedaceonsnsess 38 588 SCPI Command Summary ssesssssesseeccsseccsesecssecccseecsseecsseeccoseeesescossee 39 588 SCPI Command Summary sesssssessesccoecccsesecssecccseecsseecoseeccsseeosescoseee 40 588 SCPI Command Summary sssssssesseeccoseecsesecsseccoseeesseecoseeccseeecsescoseee 41 IEEE 488 2 Common Commands eere eene essen nenas 42 Appendix nds vesesncdsccesscdcdecacannsssnsabenvecenedeawsecadadonsesssaceareeeove 43 Appendix A 588 Specifications cccsscccssssccccssscccsssccccessscceessccceees 44 Appendix B Safety Symbols ccccccsssscccsssssccsssccccessccccsssscesessccosees 46 Appendix C COM Dm 50 Appendix D Ethernet Connectivity sss sss sese sss seene neeaae 52 Appendix E External Clock Jueoeosxvadke eo pre FENn SY RES PELO E EE EF e ep Ye KURSE 54 Introduction Introduction This manual is a reference designed to familiarize you with the Berkeley Nucle onics 588 series pulse generator and is arranged so that you can easily find the information you re looking for Generally each topic has its own section and no sectio
19. NG 1 cycle BURST MODE 1 to 9 999 999 TTL ADJUSTABLE OUTPUTS NUMBER 4 or 8 Channel Outputs LOAD 50 ohm RISE TIME 3ns typ TTL 15ns typ 20V high imp Adj 25ns typ 10V 50 ohms Adj SLEW RATE gt 0 5 V ns TTL gt 0 1V ns Adj OVERSHOOT lt 100mV 10 of pulse amplitude LEVELS TTL 0 to 4 VDC high imp 2 0 to 20 0 VDC high imp 1 0 10 0 VDC into 50 ohm RESOLUTION 10mV ACCURACY ns 001 x Setpoint 44 EXTERNAL INPUTS TRIGGER INPUTS NUMBER RATE THRESHOLD MAXIMUM INPUT VOLT RESOLUTION IMPEDANCE SLOPE IMPEDANCE JITTER INSERTION DELAY MINIMUM PULSE WIDTH GATE INPUTS THRESHOLD MAXIMUM INPUT VOLT RESOLUTION POLARITY FUNCTION CHANNEL BEHAVIOR PULSE INHIBIT DELAY OUTPUT INHIBIT DELAY 0 20r4 DC to 1 200ns longest delay 0 2 to 15VDC 60V Peak 10mV 1000 ohm Rising or Falling 1000 ohm 800ps RMS 180ns 2ns 0 2 to 15 VDC 60V Peak 10mV Active High Active Low Pulse Inhibit or Output Inhibit Global w Individual Channel 120ns 50ns STANDARD FEATURES FUNCTIONS COMMUNICATIONS USB RS232 GLOBAL GATES TRIGGERS 2 Global Gate Trigger Inputs CHANNEL GATES TRIGGERS Optical Electrical Available EXTERNAL CLOCK IN EXTERNAL CLOCK OUT COMMAND SET COMPATIBILITY OPTIONS 5ns Jitter 10MHz 100MHz in 1MHz increments 0 02V To Rate Chan 2X ExtPLL 1X ExtPLL 1 2x EXIPLL 1 2 Ext 40 MHz 20 MHz 10 MHz 5 MHz Disabled Backwards Compatible COM Extended Communicati
20. Query only Returns the state of the machine STATe returns 1 if the machine is armed and or generating pulses or 0 if the machine has been disarmed BEEPer BEEPer sta Subsystem Controls the audible beeper STATe pente o Enables disables the beeper VOLume zr nic valies Sets the volume of the beeper Range is O to 100 i where 0 is off and 100 is maximum volume lt COMMunicate L Subsystem Controls the RS232 and GPIB interfaces Subsystem Controls the physical configuration of the RS232 port BAUD 19200 Sets the baud rate for both receiving and 38400 transmitting using the DB9 RS232 port 57600 115200 4500 Sets the baud rate for communication when using 9600 19200 mapped comports for USB and Ethernet USB 38400 w communication Must be set to the default valve 115200 for raw TCP IP communication i e 376007 Labview 115200 i ECH beali velis Enables Disables transmission of characters l S 5 received on the DB9 serial port AUTorun seis vein After power up unit will start generating pulses automatically Query only Returns SCPI version number in the SERN Query only Returns the serial number 41 Std DISPlay Std Subsystem Contains commands to control the display Enables Disables automatic display update MODe Shosiesndalies Naw When true front panel display is updated with serial command parameter changes Setting to false decreases response time
21. TATE ON cr lt lf gt starts the pulses INST STATE ON cr lt lf gt alternate form to start pulses 37 Example 2 25us pulsewidth 0 delay external trigger one pulse for every trigger PULSE1 STATE ON cr lt lf gt enables channel A PULSE1 POL NORM cr lt lf gt sets polarity to active high PULSE WIDT 0 000025 cr lt lf gt sets pulsewidth to 25us PULSE1 DELAY 0 cr lt lf gt sets delay to 0 PULSEO MODE SING cr lt lf gt sets system mode to single shot PULSE TRIG MODE TRIG cr lt lf gt sets system to external trigger PULS EXT LEV 2 5 or lf sets trigger level to 2 5 v PULS EXTEDGE RIS cre lf set to trigger on rising edge To arm the instrument in external gate mode use either of the following com mands PULSEO STATE ON cr lt lf gt arms the instrument INST STATE ON cr lt lf gt alternate form if T is currently selected A software generated external trigger can be generated by using the following command TRG cr lt lf gt generates a software external trigger 588 SCPI Command Summary Std New INS Trument Std Subsystem Supports treating each channel as a logical instrument Query only Returns a comma separated list of the CATalog Std names of all channels A two channel instrument would return T CHA CHB Query only Returns a comma separated list of the FULL Std names of all channels and their associated number i A two channel instrument
22. UNUM EUM DUDEN NE MD 19 Ci MU Pos a 19 Setting the Clock Source and Internal Rate sss 19 pettine the Output Reference auc d ip RIF DEM HN MESI HI E SE EUREN MEMINI S 19 Syst m Meni neos neni vin prev EDD VERI ERE VENCS EXACIVDF DE CDI VK EMEN VN EXKL NEUVE XX MEE NES EEEa 21 Setting System Communication Parameters sse eee eee 21 petting Keypad Parameters diede Exi jr anaa S aE aa E aa 21 petting the Auto Start NOU nonunion n e A E EGS 21 Setting the Display Decimal Mark iisisnorinniineeiaii isin a n E ER 21 petting the Display DENSIS ooa denis naeia Db vU EID ia E E E 21 OLON Sh TTT 21 Ding a Confieuratio eseese a E e e E aaa 21 DOMAIN TTE 21 Recalling System Contmdvatliflg occisi E anb eS a ainis ie Sd RUM Na ET Ear 21 5 Operating the 3558 oi o v ER eversa Pede sar ciere 23 Quick Start Normal Internal Rate Generator Operation 24 Quick Start Normal External Trigger Operation eee creer eene 24 System Timer OVGEVIG WoivivenV gut ASENARYEMIY GS QI Ax UP PEYRVN VEU VYYREEVNEMENIANVMEENENEAXS QUAE CUEQMPIVEE K 25 RECEDIT ROUTE ST S 25 To Use Single Shot Mod siririca RIED Impr IR PES UA dia UON O MED D MUI Meine 25 To Use System Burst Mode Function sss sese 26 To Use System Duty Cycle Funecblfi uis ive sias eee 26 Channel Timer Overview sssssssssssssecccccccccccccccccccccscccccccecccecccccccccsssssssssessssssssssseseeeoo 26 To Use Normal Mode E
23. ation of numbers including optional signs decimal points and scientific notation 123 123e2 123 1 23e2 123 1 23e 2 1 2300E 01 lt boolean value gt Represents a single binary condition that is either true or false True is represented by a 1 or ON false is rep resented by a 0 or OFF Queries return 1 or 0 identifier Selects from a finite number of predefined strings Error Codes The unit responds to all commands with either ok lt cr gt lt lf gt or n lt cr gt lt lf gt Where n is one of the following error codes Incorrect prefix i e no colon or to start command Missing command keyword Invalid command keyword Missing parameter Invalid parameter Query only command needs a question mark Invalid query command does not have a query form Command unavailable in current system state ONoOaRWD Programming Examples Example 1 20 ms pulsewidth 2 3 ms delay 10 Hz internal trigger continuous operation PULSE1 STATE ON cr lt lf gt enables channel A PULSE1 POL NORM cr lt lf gt sets polarity to active high PULSE WIDT 0 020 cr lt lf gt sets pulsewidth to 20 ms PULSE1 DELAY 0 0023 cr lt lf gt sets delay to 2 3 ms PULSEO MODE NORM cr lf sets system mode to continuous SPULSEO PER 0 1 crs lt sets period to 100 ms 10 Hz PULSEO EXT MODE DIS cr lt lf gt disables the external trigger To start the pulses use either of the following commands PULSEO S
24. ay from your heart in case of accidental contact with a high voltage You will significantly reduce the risk factor if you know and observe the following safety precautions e If possible familiarize yourself with the equipment being tested and the location of its high voltage points However remember that high voltage may appear at unexpected points in defective equipment e Do not expose high voltage needlessly Remove housing and covers only when necessary Turn off equipment while making test connections in high voltage circuits Discharge high voltage capacitors after shutting down power e When testing AC powered equipment remember that AC line voltage is usually present on power input circuits such as the on off switch fuses power transformer etc e Use an insulated floor material or a large insulated floor mat to stand on and an insulated work surface on which to place equipment Make certain such surfaces are not damp or wet e Use the time proven one hand in the pocket technique while handling an instrument probe Be particularly careful to avoid contact with metal objects that could provide a good ground return path e Never work alone Someone should always be nearby to render aid if necessary Training in CPR first aid is highly recommended Front Panel Overview Front Panel Overview 588 Front Panels Display Layout and Indicators A graphical display module displays parameters and status information The s
25. d Gate Enabled ow SYSTEM Menus comm Gomm Keypad Misc Parameters Parameters Parameters Parameters Interface RS232 Interface USB Key Repeat Rate STORE Menu RECALL Menu Store Menu Recall Menu Configuration Configuration Name Help Line Help Line 15 System Mode Menu To Mode To Mode To Mode To Mode MODE MODE Single MODE Duty On Cycle Setting System Mode of Operation The MODE menu sets the T system timer mode The menu will show the extra set parameters Burst On amp Off only when they are appropriate Mode Selects the T mode Continuous Single Shot Burst or Duty Cycle mode Burst Sets the number of pulses to be generated when in Burst mode On Sets the number of pulses to be generated during each on cycle e Off Sets the number of pulses to skip each during off cycle when in the Duty Cycle mode NOTE Any mode may be started by either the RUN STOP key in the internal trigger mode or armed by the RUN STOP key and started by an external trigger in the external trigger mode In the single shot and burst modes internally triggered the unit disarms itself at the end of the pulse train Pressing the RUN STOP key after the unit has been disarmed will generate a new pulse train Channel Menus Timing Pulse Parameters Configuration Channel Enable Channel Enable Pulsewidth S RN Output Level Channel Channel Channel Channel Multi
26. erators had a divide by n function The duty cycle mode is a more general case To reproduce the divide by n function set the on cycle to 1 and set the off cycle to n 1 where n is the divide by n factor 27 To Use the Channel Gating Function Each channel may use the external input to gate or control its output The gate controls the triggering of the channel To use the gate set the following param eters within the Channel menu Mode In Gate Menu must be set to Channel Menu Channel Gate Select pulse INH or output INH Logic Select active high or active low In Pulse method the gate prevents the channel from being triggered by the channel s trigger source pulse If a pulse has already started when the gate disables the channel the pulse will continue normal output but will not restart on the next pulse In Duput method the gate leaves the base triggering alone and enables disables the output directly External Input Overview The external inputs may be used to trigger the unit or to gate the system or channel timers When using a trigger input the external input acts as a system start pulse Depending on the system mode the result of a trigger input can be either a single pulse a burst of pulses or the start of a stream of pulses To Generate a Pulse on Every Trigger Input To generate a pulse on every external trigger received set the following param eters within the Mode menu Mode Select the Si
27. ethod the Digi Connectware s Realport Drivers setup must be used to install the COM port on the pc This virtual COM port is then local to the computer it was installed on Please refer to the Digi Connectware documentation supplied on the cd or call Berkeley Nucleonics technical support The pulse generator s SCPI parameter SYSTem COMMunicate SERial USB n is defaulted to 115200 and should not be changed for Ethernet communication whether or not a mapped COM port is used The virtual COM port on the pc should be set to 115200 BAUD Echo functionality is not available on the Ethernet port Programming Command Types and Format The 588 Pulse Generator uses two types of programming commands IEEE 488 2 Common Commands and Standard Commands for Programmable Instruments SCPI The formatis the same for all interfaces Hyperterminal in Windows or any other generic terminal program may be used to interactively test the commands using the RS232 interface The format of each type is described in the following paragraphs Line Termination The pulse generator uses text style line terminations When a command is sent to the unit the firmware is programmed to read characters from a communica tion port until it reads the line termination sequence 34 The command string is parsed and executed after reading these characters These characters are the carriage return and linefeed They are ascii charac ter set values 13 and 1
28. haracter and may include param eters The parameters are separated from the command pneumonic by a space character For Example RST cr lt lf gt RCL 1 cr lt lf gt IDN cr lt lf gt SCPI Command Keywords The commands are shown as a mixture of upper and lower case letters The upper case letters indicate the abbreviated spelling for the command You may send either the abbreviated version or the entire keyword Upper and or lower case characters are acceptable For example if the command keyword is given as POLarity then POL and POLARITY are both acceptable forms truncated forms such as POLAR will generate an error polarity pol and PolAriTy are all acceptable as the pulse generator is not case sensitive 35 SCPI Command Format SCPI commands control and set instrument specific functions such as setting the pulsewidth delay and period SCPI commands have a hierarchical structure compose of functional elements that include a header or keywords separated with a colon data parameters and terminators For example SCPI Format PULSE1 STATE ON cr lt lf gt PULSe1 WIDTh 0 000120 cr lt lf gt PULSe POL NORMal cr lt lf gt Any parameter may be queried by sending the command with a question mark appended For example QUERY FORMAT PULSE1 STATE Will return 1 lt cr gt lt lf gt PULSE1 WIDT lt cr gt lt lf gt Will return 0 000120000 lt cr gt lt lf gt PULSE1 POL lt cr gt
29. hout affecting the timing on normal mode channels by pressing function RUN STOP Setting Pulse Timing Parameters Pulses are defined by a delay from their sync or start pulse to the active edge and a width Wid Sets the width of the active portion of the pulse Dly Sets the delay from the sync source to the start of the pulse 10 NOTE If Wid Dly 75ns hardware reset time gt T Period the correct pulsewiath will be generated but at a slower rate Setting Pulse Output Parameters There are two basic types of outputs available on the 588 a TTL CMOS com patible outputs b adjustable amplitude outputs Out Selects between TTL CMOS mode and Adjustable mode when both are available on a single output Pol Sets the voltage polarity of the pulse active high or ac tive low Note All outputs are positive negative volt ages are not supported Ampl In adjustable mode the unloaded output voltage is set The actual output voltage will depend on the load im pedance For example If the load is 50 ohms the out put will be 5096 of the stated voltage Using the Output Multiplexer Each output channel includes a multiplexer which allows routing any or all of the timer outputs to the physical output This allows double pulses and other com plex pulse trains to be generated HGFEDCBA Mux 00000101 The multiplexer is represented by a n bit binary number as shown above n is the number of channels Each bit
30. icular function key a second time Selecting Menu Items Within a menu the blinking cursor indicates the current menu item for editing The NEXT will select a different menu item Numeric Input Mode When the current item is numeric the system enters the Numeric Input Mode In this mode data may be edited using the arrow keypad The Left and Right arrow keys are used to select a digit to edit The selected digit blinks to identify itself as the active digit The Up and Down arrow keys are then used to increment or decrement this digit Entering Non Numeric Parameters When the current item is non numeric the Up and Down arrow keys are used to select among different options for the parameter If the item is an on off toggle the Up arrow enables the item and the Down arrow disables the item Enabling System Output The RUN STOP key is used to arm the system With external trigger disabled the key will arm and start pulse output With external trigger enabled the key will arm the pulse generator Pulse output then starts after the first valid trigger input Pressing the RUN STOP key a second time disables the pulse generator Enable Disable Channel Output Atthe top of each channel menu page is a parameter to enable or disable the output of the channel Each channel may be individually enabled or disabled Rearming the Channel Timers If there are channels currently running in normal mode single shot and burst channels can be re armed wit
31. ill stop the output After the burst has been completed pressing the RUN STOP button will generate an other burst To generate a burst of pulses Within the system Mode menu Mode Select the Burst mode Burst Set the number of pulses to produce in the burst To Use System Duty Cycle Function The RUN STOP button starts a continuous pulse stream which oscillates on for the n pulses and off for m pulses where n and m are specified by the On and Off parameters respectively The rate is specified in the Rate Menu To generate a stream of pulses which oscillates on for n pulses and off for m pulse within the system Mode menu Mode Select the Duty Cycle mode On Set the number of pulses to produce during the on cycle Off Set the number of pulses to skip during the off cycle within the Rate menu Source Select the system oscillator or the external clock in fre quency Period Set desired Period Channel Timer Overview The output of each channel is controlled by two timers to generate the delay timing and the pulsewidth All channels are simultaneously triggered depending on the system mode by either the internal T pulse the external trigger or a trigger provided by a cpu Agiven channel may or may not generate a pulse depending on its own channel mode as described below To Use Channel Normal Mode Function The Normal mode generates a continuous stream of pulses at a rate determined by
32. lses Using the External Trigger The external trigger may be used to start the unit generating pulses within the Mode menu Mode Select the Continuous mode within the Rate menu Source Select the system oscilator or an external clock in fre quency Per Set the period between pulses within the Trigger menu Mode Select the Trigger mode Level Set the trigger threshold level Edge Select which edge rising or falling to trigger on Pressing the RUN STOP key will arm the unit Once the unit is armed it will begin generating pulses after an external trigger is received Triggers that occur after the pulses start are ignored Pressing the RUN STOP key a second time will disarm the unit To use the External Gate to Control the System The external gate may be used to control the output of the unit To gate the system timer within the Gate menu Mode Select Gate Menu 29 Gate Level Method advanced within the Mode menu Mode within the Rate menu Source Per within the Gate menu Mode Level Logic Select active high or active low Set the threshold voltage for the external input Select Pulse or output press Function Key and then hit Channel Key repeat to cycle through Advanced Chan nel Menu Select the desired mode Select the system oscillator or an external clock in fre quency Set the period between pulses Select pulse INH or output INH Set the gate threshold level
33. mple continuous stream of pules is required Starting from the default settings which can be recalled by recalling configuration 0 the following parameters need to be set Pulse Width Delay Enter the Channel menus by pressing the letter key Enter the required pulse width and delay Repeat for each output channel T Period Enter the rate menu Set the desired pulse period Note that in general the pulse delay plus the pulse width plus a 75ns hardware reset constant for any channel must be less than the T period Start Press the RUN STOP key to start generating pulses Stop Press the RUN STOP key a second time to stop gen erating pulses Quick Start Normal External Trigger Operation To generate a single pulse for every external trigger event based on the default configuration O the following parameters need to be set System Mode Enter the MODE menu Select Single Shot mode Trig Enter the TRIG menu by pressing the TRIG key Select Triggered Level Press the NEXT key until the Level parameter is dis played Setthe trigger threshold voltage to approxi mately 50 of the trigger signal amplitude 24 Edge Press the NEXT key until the Edge parameter is high lighted Set the instrument to trigger off the rising edge or falling edge as desired Pulse Width Delay Enter the Channel menus by pressing the letter key Enter the required pulse width and delay Repeat for each output channel Start Press the RUN STOP key
34. n assumes that you ve read anything else in the manual Technical Support For questions or comments about operating the 588 our technical staff can be reached via one of the following methods Phone 415 453 9955 Fax 415 453 9956 Internet www berkeleynucleonics com Warranty In addition to a 30 day money back guarantee the 588 has a two year limited warranty from the date of delivery This warranty covers defects in materials and workmanship Berkeley Nucleonics will repair or replace any defective unit Contact us for information on obtaining warranty service Package Contents The box you receive should contain the following 588 Pulse Generator AC Power Cord User s Manual on Disc Contact Berkeley Nucleonics 415 453 9955 if any parts are missing Safety Issues Normal use of test equipment presents a certain amount of danger from electri cal shock because testing must be performed where exposed voltage is present An electrical shock causing 10 milliamps of current to pass through the heart will stop most human heartbeats Voltage as low as 35 VDC or RMS AC should be considered dangerous and hazardous since it can produce a lethal current under certain conditions Higher voltages pose an even greater threat because such voltage can easily produce a lethal current Your normal work habits should include all accepted practices that will prevent contact with exposed high volt age and steer current aw
35. nd System Mode Generator Internal To Pulse Command External Input Channel Timers and Channel Output gt Mode Generators Pulses Start source is RUN button in Internal Modes External input in External Trigger modes TRG command via Serial GPIB access Channels are armed by the RUN button In single shot and burst modes channels may be rearmed by pressing the RUN button System Timer Functions The System Timer functions as a non retriggerable multi vibrator pulse genera tor This means that once started depending on the mode the timer will pro duce pulses continuously Before pulses can be generated the timer must be armed and then receive a start pulse Arming the counter is done by pressing the RUN STOP key With external trigger disabled the RUN STOP key also generates the start command for the counter With external trigger enabled the external trigger provides the start pulse In either case once started the counter operation is determined by the System Mode Generator Standard modes include e Continuous Once started T pulses are generated continuously s Single Shot One T pulse is generated for each start command Burst n T pulses are generated for each start command Duty Cycle Once started T pulses cycle on and off continuously The T pulses are distributed to all of the start inputs of the Channel Timers and Mode Generators 8 Channel Timer Functions The Channel Timer functions
36. ngle Shot mode within the Trigger menu Mode Select Triggered mode Level Setthe trigger threshold level Edge Select which edge rising or falling to trigger on Pressing the RUN STOP key will arm the unit Once the unit is armed it will generate a T pulse for every external trigger received Pressing the RUN STOP key will disarm the unit This mode corresponds to the normal external trigger mode found on most other pulse generators To Generate a Burst of Pulses on Every Trigger Input To generate a burst of pulses for every external trigger received set the following parameters within the Mode menu Mode Select the Burst mode 28 Burst Set the number of pulses to generate in each burst within the Rate menu Per Set the period between pulses within the Rate menu Source Select the system oscilator or an external clock in fre quency Per Set the period between pulses within the Trigger menu Mode Select Triggered mode Level Set the trigger threshold level Edge Select which edge rising or falling to trigger on Pressing the RUN STOP key will arm the unit Once the unit is armed it will generate a set of pulses for every external trigger received The unit is reset at the end of a burst and will generate another set of pulses upon receiving a new trigger Triggers that occur in the middle of a burst are ignored Pressing the RUN STOP key will disarm the unit To Start a Continuous Stream of Pu
37. ons Ethernet GPIB MODULES Standard Quad TTL Adjustable 45 Appendix B Safety Symbols Safety Marking Symbols Technical specifications including electrical ratings and weight are included within the manual See the Table of Contents to locate the specifications and other product information The following classifications are standard across all BNC products Indoor use only Ordinary Protection This product is NOT protected against the harmful ingress of moisture Class 1 Equipment grounded type Main supply voltage fluctuations are not to exceed 10 of the nominal supply voltage e Pollution Degree 2 e Installation overvoltage Category II for transient overvoltages Maximum Relative Humidity 8096 RH non condensing Operating temperature range of 0 C to 40 C Storage and transportation temperature of 40 C to 70 Maximum altitude 3000 m 9843 ft e This equipment is suitable for continuous operation This section provides a description of the safety marking symbols that appear on the instrument These symbols provide informatin about potentially danger ous situations which can result in death injury or damage to the instrument and other components 46 un lt 2 z e a 1 Publications Descriptions amp Comments IEC 417 No 5031 Direct current Vdc may be used on rating labels IEC 417 No 5032 Alternating current For rating labels the symbol is typically
38. plexer Mode Mode Mode Mode Menu wur eur ee eae e Enable Enable Enable Enable Enable a eee OE f HTH H 9 LH RRR 16 Enabling Channel Output At the top of each of the channel menu pages is a parameter to enable or dis able the channel Each channel may be individually controlled Setting the Channel Timing Parameters To define a pulse requires two parameters the delay to the active edge and the width of the pulse Wid Sets the channel pulsewidth Dly Sets the channel delay until the active edge Setting Pulse Output Configuration The 588 supports two types of outputs a high speed TTL CMOS compatible output and for applications which require different voltage levels or higher cur rent an adjustable voltage output The pulses can also be defined to be active high or active low Pol Sets the pulse polarity active high or active low Out Selects the output mode TTL CMOS or Adjustable Ampl Sets the output voltage level when in the Adjustable mode Setting Pulse Mode of Operation Each channel may be set independently to operate in one of four modes normal single shot burst or duty cycle within the CHANNEL menus Mode Selects the mode for the current channel Additional parameters are provided for the burst mode and the duty cycle mode Brst Sets the number of pulses in the burst mode to gener ate before inhibiting output On Sets the number of pulses to generate before inhibiting output in
39. quired to enter a username and password they are as follows Username root Password dbps If a static IP address is desired this change can be made from the web inter face Please note however that if the IP address is changed such that it is incompatible with the LAN all communication including access to the module s settings including the IP address will no longer be possible over the LAN If this happens a crossover cable must be used to access the Digi module s settings again using Digi Device Discovery Temporarily set the pc s IP ad dress to be compatible with the Digi module s IP address to get the pc and pulse generator to see each other over the crossover cable 53 Appendix E External Clock 588 External Clock Operation The 588 pulse generator has a special external clock circuit that allows for external clock synchronization when using clock sources that have very narrow pulse widths and amplitudes Parameter Minimum Maximum Frequency 10MHz 100MHz These specifications are preliminary and subject to change Using the external clock function Enter the clock surce menu by pressing the menu button until the System Mode page is reached and then press the page button until the clock source page is reached Select the ource to External Osc Adjust the threshold level appropriate for the amplitude of the external clock source Adjust the rate to match the frequency of the e
40. rced insulation equivalent to Class II if IEC 60536 ISO 3864 No B 3 6 Background colour yellow symbol and outline black Caution risk of electric shock Generally used only for voltages in excess of 1000 V It is permissible to use it to indicate lower voltages if an explanation is provided in the manual Colour requirements do not apply to markings on equipment if the symbol is moulded or engraved to a depth or raised height of 0 5 mm or that the symbol and outline are contrasting in colour with the background M IEC 417 No 5041 Background colour yellow symbol and outline black Caution hot surface Colour requirements do not apply to markings on equipment if the symbol is moulded or engraved to a depth or raised height of 0 5 mm or that the symbol and outline are contrasting in colour with the background ISO 3864 No B 3 1 Background colour yellow symbol and outline black Caution refer to accompanying documents used to direct the user to the instruction manual where it is necessary to follow certain specified instructions where safety is involved Colour requirements do not apply to markings on equipment if the symbol is moulded or engraved to a depth or raised height of 0 5 mm or that the symbol and outline are contrasting in colour with the background IEC 417 No 5268 a In position of bistable push control IEC 417 No 5269 a Out position of bistable push control 49 Appendix C COM
41. re see National Instruments website are installed The procedures discussed have been prepared using Windows XP service pack 2 Determining IP Address The Digi module has been reset to factory defaults before it left the manufactur ing facility In this mode it is ready to be assigned an IP address by the local DHCP server If a crossover cable is being used the Ethernet device will as sume a default IP address The Digi utility Digi Device Discovery can be used to determine the IP address that is currently assigned to the Ethernet module Hit Start All Programs Digi Connect Digi Device Discovery When the utility opens it scans the LAN looking for Digi Ethernet modules It may take a minute after plugging in or powering the Ethernet module before the LAN negotiates the connection with the Digi module Hit Refresh View in the left column after a minute or so if the utility fails to see the unit when you start it In some situations it is possible that the Windows Firewall will block the Digi Device Discovery from being able to see the unit It is advisable to turn the Windows Firewall off while performing these tasks When the utility sees the Digi device it will display it in the list Figure 1 52 1d Lr Figure 1 Digi Device Discovery utility displaying Digi module discovered on the LAN From this point a web interface can be opened allowing access to configura tion options for the Digi module If you are re
42. represents a channel timer which is enabled by setting the bit to one In the above example timers A and C are combined on the current output Setting System Internal Rate Parameters The internal T period controls the fundamental output frequency of the system Each channel may operate at submultiples of the fundamental frequency using their duty cycle mode Source Sets the reference source for the internal M Period Per Sets the internal P Period To setthe system Internal Rate Menu key and then use the arrow keys to specify the T Period 11 12 588 Menus 588 Menus 588 Menu Structure System MODE Menus pe Mode mem Mode Mode Mode sue MODE Duty On CHANNEL Menus Timing Parameters rise 9 Configuration Channel Enable Channel Enable 000 p Po y Output Type Pulsewidth Adjustable Channel Channel Channel Channel Multiplex Mode Mode Mode Mode Welt Menu er Menu Channel Channel Channel Channel p nene Enable Enable Enable Enable p nene Mode Mode Mode Mode 7 On On Wait a H eta Advanced CHANNEL Menus Advanced Timing Channel Gated Operation Channel Gated Operation Parameters aie Channel Enable Channel Enable Gate Enable Disabled Gate Enable lt method gt 14 Cora OOOO TRIG Menu Trig Mode Trig Mode Trig Disabled Trig lt trig mode gt o l e GATE Menu Gate Mode Gate Mode Gate Disable
43. s to define the Clock In parameters Sets source for internal clock or external clock Sets internal clock circuitry to match the incoming signal from the external clock source Range is 10MHz 100MHz Sets threshold value for the clock in circuitry Ranges from 0 02V 2 5V Sets external clock output To Pulse or 5096 duty cycle TTL output from 10MHz to 100MHz Subsystem Contains the commands to define the Gate function Sets Global Gate Mode Disable pulse inhibit output inhibit channel Sets Channel Gate logic level Active low or active high Sets the Trigger Threshold Value is in volts with a a range of 20 to 15 Volts Subsystem Contains the commands to define the Trigger function Sets Trigger Mode Disable or TRIG enable Selects which edge rising or falling to use as the trigger signal Sets the Trigger Threshold Value is in volts with a range of 20 to 15 Volts 39 588 SCPI Command Summary Keyword Parameter Comments Subsystem Contains commands to control the output pulse generation Valid suffix range depends on the number of channels ChA 1 ChB A sr std 2 etc Command without suffix refers to the currently selected logical instrument See INSTrument subsystem STATe Std oe the output pulse for selected WID Th Std Sets the width or duration of the output pulse DELay numeric value Std Sets the time from the start of the To period to the first edge of the pulse
44. t behavior from other channels Gate Enables the GATE input for the channel by setting the method of output control used with the gating function Logic Sets the logic level used with the gating function either active high or active low Pulse Inhibit method the gate prevents the channel from being triggered by the channel s trigger source pulse If a pulse has already started when the gate disables the channel the pulse will continue normal output but will not restart on the next trigger pulse Output Inhibit method the gate leaves the base triggering alone and enables disables the output directly Gate Menu Gate Mode Gate Mode Gate Disabled Gate method 18 Enabling System Gate Enables the use of the GATE input as a trigger inhibit or output control for all channels simultaneously or on a per channel basis Mode Selects between disabling the GATE inputs and method of output control Level Sets the gating threshold Logic Sets the active logic level Trig Menu Trig Mode Trig Mode Trig Disabled Trig lt trig mode gt p e Enabling System Trigger Enable the use of the TRIG input by the system timer as a trigger source Mode Selects between disabling enabling the trigger mode s Level Sets the trigger threshold Edge Selects between rising edge falling edge as the trig ger source when a trigger mode is enabled Rate Menu Rate Source Reference Out wr
45. tatus information is located in the upper left corner of the display between the two brackets There are three enunciators e Vertical Arrow Indicates there are additional pages to the current menu e Blinking Light Indicates the unit is actively generating pulses or armed and waiting for an external trigger The upper right side of the display contains the title of the currently displayed menu The rest of the display is used for system parameters The display brightness may be adjusted allowing the instrument to be used under various lighting conditions Description of Front Panel Area Keypads Two keypad areas provide fast access to various menus and easy editing of system parameters MenuKeypad Provides one touch access to the channel trigger gate and system menus for setting up the appropriate parpameters The Page button will allow you to page through the multiple levels fo a menu if multiple levels exist Arrow Keypad The up down arrows are used to increment decrement the current parameter indicated by the blinking cursor The position of the cursor controls the step size for each increment The right left arrow moves the cursor to different positions within the current parameter The NEXT key selects the next parameter in the currently displayed menu Pulse Concepts and Pulse Generator Operations Pulse Concepts and Pulse Generator Operation Counter Architecture Overview To Internal System Timer a
46. the system timer within the Channel menus Enable Select Enable to enable channel output Dly Set the desired delay Wid Set the desired pulsewidth Mode Select the Normal mode 26 Pressing the RUN STOP key will now generate a continuous stream of pulses To Use Channel Single Shot Function The Single Shot mode generates a single pulse every time the RUN STOP key is pressed To use the Single Shot mode within the Channel menus Enable Select Enable to enable channel output Delay Set the desired delay Width Set the desired pulsewidth Mode Select the Single shot mode To Use Channel Burst Mode Function The Burst mode generates a burst of pulses every time the RUN STOP key is pressed To use the Burst mode within the Channel menus Enable Select Enable to enable channel output Delay Set the desired delay Width Set the desired pulsewidth Mode Select the Burst mode Burst Set the number of pulses to produce in the burst To Use the Channel Duty Cycle Function To generate a stream of pulses which oscillates on for n pulses and off for m pulses within the Channel menus Enable Select Enable to enable channel output Delay Set the desired delay Width Set the desired pulsewidth Mode Select the Duty Cycle mode On Cycle Set the number of pulses to produce during the on cycle Off Cycle Set the number of pulses to skip during the off cycle Note Older Berkeley Nucleonics pulse gen
47. to automatically start generating pulses after power up Setting the Display Decimal Mark Mark Selects the format of the decimal mark or Setting the Display Brightness LCD Adjusts display brightness 20 Store Menu Store Menu Configuration Help Line Storing a Configuration Use the following procedure to store a complete system configuration Setall parameters to the desired value Select a configuration number NOTE You cannot store to the zero location as that contains the factory default values Labelthe configuration as desired Fromthe Store menu press the store button sequence Page NOTE When the unit powers up it will recall the last stored or recalled configuration Any changes to the configuration which were not saved are not restored Recall Menu Recall Menu Configuration Help Line Recalling System Configurations Use the following procedure to recall a stored or default system configuration Enterthe Recall Menu Select a configuration number Fromthe Recall Menu press the recall key sequence Page Note Configuration 0 is the factory default setting 21 22 Operating the 588 23 Operating the 588 Quick Start Normal Internal Rate Generator Operation The 588 has a powerful set of functions providing a number of modes of opera tion for the internal or System rate generator T Most of these functions can be ignored if a si
48. to start arm the instrument The 9520 will now generate a pulse for every valid trig ger Stop Press the RUN STOP key a second time to stop dis arm the instrument i e to stop generating pulses System Timer Overview For internal operation the 588 contains a timer and mode generator which generates an internal T clock that is used to trigger all the channel timers Sys tem modes are controlled via the MODE menu To Use Continuous Mode The RUN STOP button starts and stops a continuous pulse stream at the rate specified by the Rate menu This corresponds to the normal output mode for most pulse generators To generate a continuous stream of pulses within the system Mode menu Mode Select Continuous for the system mode within the Rate menu Source Select the system oscilator or the external clock in fre quency Period Set the desired period Pressing the RUN STOP key will now generate a stream of T pulses at a rate specified by the period parameter To Use Single Shot Mode To generate a single pulse with every press of the RUN STOP key within the system Mode menu Mode Select Single Shot for the system mode Pressing the RUN STOP key will now generate a single pulse 25 To Use System Burst Mode Function The RUN STOP button generates a stream of n T pulses where n is speci fied by the Burst parameter The rate is specified in the Rate menu Pressing the RUN STOP button while the burst is in process w
49. would return T 0 CHA 1 CHB 2 Keyword Parameter Comments Query only Returns an indentured list of all SCPI 2 Selects a channel using the channel s numeric value NSELect numeric value All channel specific commands will refer to the selected channel Selects a channel using the channel s identifier SELect identifier Std string All subsequent channel specific commands will refer to the selected channel Enables Disables the selected channel output If To boolean value is selected all output is affected Enabling To is the same as pressing the RUN button 38 588 SCPI Command Summary Keyword Parameter PULSe 0 STATe boolean value PERiod numeric value NORMal l SINGIe MODE BURSt DCYCle To 10 11 12 OCLock 14 16 20 25 33 50 100 em DIS PULS OUTP Std New Comments Subsystem Contains commands to control the output pulse generation Commands without suffix refer to the currently selected logical instrument See INSTrument subsystem Enables Disables the output for all channels Command is the same as pressing the RUN STOP button Sets the To period Sets the To mode Burst Counter Number of pulses to generate in the Burst mode Pulse Counter Number of pulses to generate during on cycle of the Duty Cycle mode Off Counter Number of pulses to inhibit output during the off cycle of the Duty Cycle mode Subsystem Contains the command
50. xternal clock source A will appear fi the system does not lock onto the external clock source Possible causes are Threshold level not adjusted correctly External clock source not present External clock has excessive jitter Amplitude of external clock is changing Figure 1 94 55
Download Pdf Manuals
Related Search