Home

4033 & 4034 Pulse Generator User Manual

1. r 30 3413 Pulse DelflritiOris HERR Eu me nn 31 3 14 Pulse Parameter 32 3 15 Pulse DeflhitiOris i it rep FRE ER e E EE te Rede Minder 33 m o 35 0 Cc 35 AAP OVEIMIO DUI 35 4 2 DEVICE MeL REI 36 4 3 Interface Function 5 56158 37 7 4 DEVICE Address ttt eta r 37 4 5 Message Exchange 37 4 6 Instrument identification ie ted eet nia ni dees 38 4 7 Instrument Reset an a 38 MO OOM cet ct TEE 38 4 9 Command Syntax a lu 39 4 10 Status Reporting 41 4 11 IEEE 488 2 Common Commands and 45 4 12 Instrument Control ee EE Red 48 4 13 JEEE 488 1 Interface Messages creer tette 64 414 SGPIIGOMMANG Tree ec teo b eoi tec beside eet teda Saad 65 4 15 5 1 GPIB Gode Ghart er reete eee teet Ete ete bin 67 4 16 RS2232 Program min ss er ec o ERE A 69 Sec
2. TRIGGER Sensitivity 200 mVp p minimum INPUT Minimum Width 10 ns Maximum Rate 50 MHz Input Impedance 10 kO Input Protection 15V DC plus peak AC Range Selectable from 10 V to 10 V Resolution 3 digits limited to 10 mV Slope Selection Positive or Negative SYNC OUTPUT A TTL level pulse at the programmed period Output impedance is 50 Q protected against short circuit and up to 15 V accidental input The high level is 22 V into 50 ohms and with 3 5 ns typical transition times GPIB PROGRAMMING Interface GPIB and RS 232 IEEE 488 2 and SCPI compatible GPIB Function Codes 5 T6 L4 SRI RL1 DC1 DT1 CO E2 GENERAL Memory Non volatile stores up to 99 complete panel settings Last user setup also retained at power down Power Requirements 100 240 V 10 48 66 Hz 50 VA maximum Dimensions WxHxD 8 4 x 11 8 x 3 5 inches 213 x 300 x 88 mm Net Weight Approx 3 kg EMC Conforms to EN55011 class B for radiated and conducted emissions Electrical Discharge Immunity Conforms to EN55082 Safety Specifications Conforms to EN61010 CE Approved Operating Temperature 32 F to 122 F 0 C to 50 C Storage Temperature 4 F to 140 F 20 C to 60 C Humidity 90 RH at 32 F to 86 F 0 C to 30 C 2 1 2 2 2 3 2 4 2 5 Section 2 Installation Introduction This section contains
3. a a2 4033 4034 50 MHz Programmable Pulse Generator USER MANUAL J 900 00 ns WID 200 0 ns DEL 0 0 ns LAY DUTY CONT anes 500 00 ns WIC 200 0 DEL O 0 ns Safety Summary The following safety precautions apply to both operating and maintenance personnel and must be observed during all phases of operation service and repair of this instrument Before applying power follow the installation instructions and become familiar with the operating instructions for this instrument Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the instrument B amp K PRECISION assumes no liability for a customer s failure to comply with these requirements GROUND THE INSTRUMENT To minimize shock hazard the instrument chassis and cabinet must be connected to an electrical ground This instrument is grounded through the ground conductor of the supplied three conductor ac power cable The power cable must be plugged into an approved three conductor electrical outlet Do not alter the ground connection Without the protective ground connection all accessible conductive parts including control knobs can render an electric shock The power jack and mating plug of the power cable meet IEC safety standards DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE Do not operate the instrume
4. 3 The low level may not be less than the low limit 4 12 1 4 Predefined High Voltage Level This command is used to set the predefined high level of the pulse The pulse will be set when the predefined USER levels are invoked to this high level COMMAND TYPE Setting or Query SETTING Syntax SOURce VOLTage LEVel IMMediate PHIGH lt ws gt lt predef high level gt units Arguments Type NRf Units MV V default Range 9 5V to 10V Rounding To 10mV Example VOLT PHIGH 4V QUERY Syntax SOURce VOLTage LEVel IMMediate PHIGH Example VOLT PHIGH Response NRf 4 12 1 5 Predefined Low Voltage Level This command is used to set the predefined low level of the pulse The pulse will be set when the predefined USER levels are invoked to this low level COMMAND TYPE Setting or Query SETTING Syntax SOURce VOLTage LEVel IMMediate PLOW ws predef low level units Arguments Type NRf Units MV V default Range 10V to 9 5V Rounding To 10 Examples VOLT PLOW 4V QUERY Syntax SOURce VOLTage LEVel IMMediate PLOW Examples VOLT PLOW Response NRf 51 4 12 1 6 Predefined Voltage Levels This command is used to set the pulse voltage levels to predefined values Four predefined values are available as follows CMOS High level 5V Low level TTL High level 2 4V Low level 0 4V ECL High level 0 8V Low level 1 3 USER User defined levels as set using the
5. 430 440 Description Query INTERRUPTED Data were sent before the entire response of a previous query was read Query UNTERMINATED An attempt was made to read a response before the complete program message meant to generate that response was sent Ouery DEADLOCKED The input buffer and output gueue are full and the controller is attempting to send more data In this case the output queue and input buffers will be cleared Parsing will resume after the END message is detected Query UNTERMINATED after indefinite response A query was received in the same program message after a query requiring an indefinite response was formatted Essentially this means that the IDN common query and the ARB DATA query should not be followed by more query messages in the same program message 4 10 5 5 System Events System events have positive valued codes They are not defined by SCPI but are specific to the pulse generator Code 401 402 Warnings Description Power on Operation complete The OPC command as been executed The execution of some commands might cause an undesirable instrument state The commands are executed but a warning is issued Sending the STATus PRESet command disables reporting of warnings The existence of these conditions causes a bit in the Status Questionable Condition register to be set For Model 4033 500 Trigger rate short 510 Output overload 44 For Model 4034 500 Trigger rate short on chann
6. SYST COMM GPIB ADDR 20 QUERY Syntax SYSTem COMMunicate GPIB ADDRess Response address in NR1 format 4 12 5 2 Error Queue Reading This query returns the first entry in the error queue and removes that entry from the queue It s function is identical to that of the STATus QUEue NEXT query COMMAND TYPE Query only QUERY Syntax SYSTem ERRor Response lt error number gt lt error description gt 4 12 5 3 SCPI Version This guery is used to read the SCPI version to which the instrument complies COMMAND TYPE Query only QUERY Syntax SYSTem VERSion Response 1992 0 NR2 format 4 12 5 4 Security This command enables the instrument memory to be cleared The stored settings are cleared when the Security state is changed from ON to OFF and the instrument state is returned to the factory power on default COMMAND TYPE Setting or Query SETTING Syntax SYSTem SECurity STATe lt ws gt lt boolean gt Arguments 63 Type Boolean Examples SYST SEC ON SYST SEC OFF QUERY Syntax SYSTem SECurity STATe Response 011 4 12 5 5 Power on Buffer This command is used to set the Power On Buffer setting The instrument will power on with the setting stored in that buffer Setting the value to 99 will result in the instrument powering up in the state it was in before it was powered down COMMAND Setting or Query SETTING Syntax SYSTem POBuffer lt ws gt lt buffer gt Arguments
7. find use mainly when commands having relatively long execution times are executed although all commands execute without any appreciable delay 4 11 3 2 Operation Complete Query The operation complete query places an ASCII character 1 in the output queue on completion of the selected device operation Command Type Common Query Syntax OPC Response ASCII character 1 Example PULS PER 1US OPC 4 11 3 3 WAI Wait to Continue Command This command is intended for use with overlapped commands No commands in the pulse generator are overlapped and so this command has no effect Command Type Common Command Syntax WAI 4 11 4 Status and Event Commands 4 11 4 1 CLS Clear Status The clear status command clears the SESR and Error Queue status data structures COMMAND TYPE Common Command Syntax CLS 4 11 4 2 ESE Standard Event Status Enable This command is used to set the value of the Standard Event Status Enable Register COMMAND TYPE Common Command or Query COMMON COMMAND Syntax ESE lt ws gt lt NRf gt Arguments Type NRf Range 0 to 255 Non integer arguments are rounded before execution Examples ESE 48 Enables the CME and EXE bits ESE 255 Enables all standard events QUERY Syntax ESE Response lt NRI gt 46 4 11 4 3 ESR Standard Event Status Register Query This query is used to read the value of the Standard Event Status Register Reading the register clears it CO
8. same level as the previous command A Program Message Unit having a colon as its first character causes the reference to return to the root This process is defined by IEEE 488 section A 1 1 Consider the following examples 1 The following command may be used to set the high and low levels of the pulse Note that the LOW command is referenced to the command preceding it The LOW mnemonic resides at the same node as the HIGH command SOURCE VOLTAGE HIGH 5V LOW 2V 40 2 This command sets the frequency the high level The FREQUENCY VOLTAGE mnemonics are at the same level SOURCE FREQUENCY 2KHZ VOLTAGE HIGH 4V 3 When Program Message Units describe different subsystems a colon prefix must be used to reset the command reference to the root Here the frequency and the output state are set SOURCE FREQUENCY 3KHZ OUTPUT STATE ON Common Commands may be inserted in the Program Message without affecting the instrument control command reference For example SOURCE VOLTAGE HIGH 4V ESE 255 LOW 2V 4 10 Status Reporting The instrument is capable of reporting status events and errors to the controller using the IEEE 488 1 Service Request function and the IEEE 488 2 Status Reporting structure 4 10 1 The Status Byte Status summary information is communicated from the device to the controller using the Status Byte STB The STB is composed of single bit summary messages each summary message summarizing an overlying Sta
9. since the data were out of the instrument s range or due to a device condition The EXE bit bit 4 of the Standard Event Status Register is set on occurrence of an execution error Code 200 201 211 221 222 Description Execution error Invalid while in local An attempt was made to change an instrument setting while the instrument was in the LOCAL state Trigger ignored The GET or TRG common command was ignored due to the device not being in the correct state to execute the trigger Settings conflict The parameter is out of range due to the current instrument state Data out of range The parameter exceeds the absolute limits 43 4 10 5 3 Device Specific Errors An error specific to the device occurred The DDE bit bit 3 of the Standard Event Status Register is set Code 315 330 350 Description Configuration memory lost Device memory has been lost Check the back up battery Self test failed Queue overflow Error codes have been lost due to more than 10 errors being reported without being read 4 10 5 4 Query Errors A query error indicates that the output queue control has detected a problem This could occur if either an attempt was made to read data from the instrument if none was available or when data were lost Data could be lost when a query causes data to be formatted for the controller to be read and the controller sends more commands without reading the data Code 410 420
10. SCPI command set as the GPIB interface The instrument is programmed by sending ASCII coded characters to the instrument When the instrument is in the remote mode remote command input has priority over any front panel control Therefore as long as the serial interface is continuously supplied with data the keyboard will appear to be inoperative to the user Note In remote mode any command sent or received via RS232 will change the display screen with the following Remotely Controlled 5232 User can return to local control with the press of any front panel keys but it is extremely important to note that this should be done ONLY when nothing is being sent or transferred between the instrument and the connected PC Any interruptions during transfer may delay the communication process or cause communication errors The instrument accepts a line feed LF as an end of string EOS terminator 4 2 Device State The device may be in one of the four possible states described below The transition between states is defined by TEEE 488 1 4 2 1 Local State LOCS 36 In the LOCS the device may be operated from the front panel only Its settings may be queried over the GPIB but not changed Commands that do not affect the signal being output by the instrument are accepted 4 2 2 Local With Lockout State LWLS In the LWLS the device may be operated from the front panel only Its settings may be queried over the GPIB but not ch
11. Trigger Commands TRG Trigger command This command is analogous to the IEEE 488 1 Group Execute Trigger interface message and has the same effect It is used to trigger the device to output a wave and is accepted only when the trigger mode is set to Trigger Gate or Burst and the trigger source is set to BUS Command Type Common Command Syntax TRG 4 11 6 Stored Settings Commands 4 11 6 1 RCL Recall Instrument State This command is used to restore the state of the device to that stored in the specified memory location COMMAND TYPE Common Command Syntax RCL lt ws gt lt NRf gt Arguments Type lt NRf gt Range 0 to 99 Non integer values are rounded before execution Example RCL 0 Recall default state RCL 99 4 11 6 2 SAV Save Instrument State This command is used to store the current instrument state in the specified memory location COMMAND TYPE Common Command Syntax SAV lt ws gt lt NRf gt Arguments Type lt NRf gt Range 1 to 98 Non integer values are rounded before execution Example SAV 25 Stored setting location 0 stores the factory defaults and is a read only location Location 99 stores a copy of the current instrument setting and it too is read only 4 12 Instrument Control Commands Instrument control commands are grouped into logical subsystems according to the SCPI instrument model The commands are comprised of mnemonics indicating the subsystem to which the command be
12. cm minimum clearance must be provided at the rear of the unit for proper convection cooling Product Dimensions SION 900 00 1 Ons DELOOns gt DUTY 88 mm 300 mm 2 6 2 7 2 8 Power Requirements The model 4033 and 4034 can be operated from any source of 100 240V 10 AC at a frequency from 48Hz to 66Hz The maximum power consumption is 50 VA WARNING THE LINE POWER VOLTAGE OF THE INSTRUMENT IS NOTED ON THE AC INPUT PLUG TO PREVENT DAMAGE TO THE INSTRUMENT CHECK FOR PROPER MATCH OF LINE VOLTAGE AND PROPER FUSE TYPE AND RATING The instrument power fuse is located in the AC input plug To access the fuse first disconnect the power cord and then remove the fuse cartridge Use T1A 250V fuse only as labeled in the rear panel of the unit Grounding Requirements For the safety of operating personnel the instrument must be grounded The central pin on the AC plug grounds the instrument when properly connected to the ground wire and plugged into proper receptacle The power jack and the mating plug of the supplied power cable meet IEC safety standards WARNING TO AVOID PERSONAL INJURY DUE TO SHOCK THE THIRD WIRE EARTH GROUND MUST BE CONTINUOUS TO THE POWER OUTLET BEFORE CONNECTION TO THE POWER OUTLET EXAMINE ALL CABLES AND CONNECTIONS BETWEEN THE UNIT AND THE FACILITY POWER FOR A CONTINUOUS EARTH GROUND PATH THE POWER CABLE MUST MEET IEC SAFETY STANDARDS Signal Con
13. cursor movement keys to enter data into the pulse generator To change a setting 1 Press the key that leads to a required item 2 Move cursor using cursor keys to the appropriate position in the numeric field 3 Use the rotary input or the numerical keyboard to change the value of the displayed item Changes take effect immediately The following subsections describe the function of each front panel key and connector 3 4 Back Panel Controls The pulse generator has 4 BNC Connectors on the rear panel where you can connect coaxial cables These coaxial connectors are labeled accordingly and serve as carrier lines for input and output signals delivered to and from the pulse generator 17 Model 4033 Model 4034 100V 240V 47 63H TRIG IN CTRLIN TIA 250V SOVA Max Gd RS 232 WARNING REFER SERVICING TO TRAINED PERSONNEL ONLY 400 240 47 63Hz TIA 250V 50VA Max 2 Figure 3 3 Back Panel View Options 50 O Reserved for future use Options TTL Reserved for future use Trig In Use this connector to apply an external trigger or gate signal depending on the waveform generator setting to the generator Maximum input is 15 V 0 Not used GPIB Interface Use to interface with a computer via GPIB for remote communication 18 6 RS 232 Interface This is a standard RS 232 port used for remote interface Null modem or cross serial cable is requi
14. installation information power requirements initial inspection and signal connections for Model 4033 and 4034 Mechanical Inspection This instrument was carefully inspected before shipment Upon receipt inspect the instrument for damage that might have occurred in transit If there is damage due to shipping file a claim with the carrier who transported the unit The shipping and packing material should be saved if reshipment is required If the original container is not to be used then use a heavy carton box Wrap the unit with plastic and place cardboard strips across the face for protection Use packing material around all sides of the container and seal it with tape bands Mark the box FRAGILE Initial Inspection After the mechanical inspection verify the contents of the shipment accessories If the contents are incomplete or if the instrument does not pass the specification acceptance tests notify the local service center The unit is calibrated and ready for use upon receipt For a detailed performance check procedure please see section 5 of the manual Instrument Mounting The model 4033 and 4034 programmable pulse generators are intended for bench use The instrument includes a front feet tilt mechanism for optimum panel viewing angle The instrument does not require special cooling when operated within conventional temperature limits The unit can be installed in a closed rack or test station if proper air flow is assured A 5
15. it is therefore usually necessary to refer to the manuals for both of the devices being connected to determine the exact pin out signal definition and signal direction for the devices The serial interface implements the same SCPI command set as the GPIB interface The instrument is programmed by sending ASCII coded characters to the instrument When the instrument is in the remote mode remote command input has priority over any front panel control Therefore as long as the serial interface is continuously supplied with data the keyboard will appear to be inoperative to the user 69 SERVICE INFORMATION Warranty Service Please go the support and service section on our website www bkprecision com to obtain RMA Return the product in the original packaging with proof of purchase to the address below Clearly state on the RMA the performance problem and return any leads probes connectors and accessories that you are using with the device Non Warranty Service Please go the support and service section on our website www bkprecision com to obtain a RMA Return the product in the original packaging to the address below Clearly state on the RMA the performance problem and return any leads probes connectors and accessories that you are using with the device Customers not on an open account must include payment in the form of a money order or credit card For the most current repair charges please refer to the service and support secti
16. lt Boolean gt WIDTh DCYCle DOUBle TR DSTATe DELay LEADing TRAiling Boolean lt NRf gt NEE AUTO lt Boolean gt ONCE 65 4 14 3 OUTPut Subsystem OUTPut STATe ON OFF 4 14 4 TRIGger Subsystem TRIGger BURSt 27 LEVel lt NRf gt lt NRf gt lt NRF gt MODE SOURce CONTITRIGIGATEIBURS INT I EXTI MANIBUS 4 14 5 STATus Subsystem STATus OPERation EVENt 2CONDition 7ENABle PTRansition NTRansition lt NRf gt lt NRf gt lt NRf gt OPERation POS NEG PRESet QUEue NEXT EVENt CONDition ENABIePT Ransiion NTRansition lt NRf gt lt NRf gt lt NRf gt 66 4 14 6 SYSTem Subsystem SYSTem COMMunicate ERRor SECurity GPIB STATE ADDRess ON OFF lt NRf gt 4 15 ASCII and GPIB Code Chart Hex 00 01 02 03 04 05 06 07 08 09 OA OB OC OD OE OF 10 11 12 13 14 15 16 17 18 19 1 1B 1C Oct Dec ASCII Msg Hex 000 0 NUL 20 001 1 SOH 21 002 2 STX 92 003 3 23 004 4 EOT SDC 24 005 5 25 006 6 26 007 7 BEL 27 010 8 BS GET 28 011 9 HT TCT 29 012 10 LF 2A 013 11 VT 2B 014 12 FF 2C 015 13 CR 2D 016 14 SO 2E 017 15 SI 2F 020 16 DLE 30 021 17 LLO 31 022 18 DC2 32 023 19 DC3 33 024 20 4 DCL 34 025 21 35 026 22 SYN 36 027 23 37 030 24 SPE 38 031 25 EM SPD 39 032 26 SUB 3A 033 27 ESC 3B 034
17. occurrence of a command error causes the CME bit bit 5 of the Standard Event Status Register to be set Code 100 101 102 103 104 105 108 109 110 111 112 113 114 120 121 123 124 128 131 134 138 140 141 144 148 158 168 178 Description Command Error Invalid character Syntax error Invalid separator Data type error GET not allowed Parameter not allowed More parameters than allowed were received Missing parameter Fewer parameters than necessary were received Command header error Header separator error Program mnemonic too long The mnemonic must contain no less than 12 characters Undefined header Header suffix out of range Numeric data error Invalid character in number Exponent too large IEEE 488 2 specifies maximum of 32000 Too many digits IEEE 488 2 specifies maximum of 255 digits in mantissa Numeric data not allowed A different data type was expected Invalid suffix Suffix too long A maximum of 12 characters are allowed in a suffix Suffix not allowed Character data error Invalid character data Incorrect character data were received Character data too long Character data may contain no more than 12 characters Character data not allowed String data not allowed Block data not allowed Expression data not allowed 4 10 5 2 Execution Errors An execution error indicates that the device could not execute a syntactically correct command either
18. on the market after August 13 2005 and should not be disposed of as unsorted municipal waste Please utilize your local WEEE collection facilities in the disposition of this product and otherwise observe all applicable requirements Safety Symbols QD Connect to safety earth ground using the wire recommended in the user manual f This symbol on an instrument indicates that the user should refer to the operating instructions located in the manual N Electrical Shock hazard Table of Contents Safety cia 2 s A 6 EE 6 Tad IATFOdUCHOM An 6 JEAN oie o 6 1 3 Saiety Remarks EET 6 1 4 Package Gontents ciii on 6 I S TR A TEE OP rss 6 led 2 9 Cc m M 9 21 Introduction itg ta tote Lad e 9 2 2 Mechanical Inspection niea ee Dee Dad dd e dea d dne 9 2 3 Initial Inspection tinte i p De aa Pa du ird 9 2 4 Instrument Mounting 1 recede 9 2 5 Product Dimensions E i EE UR e e pee indian a T d dne 9 2 6 Power Require
19. or right when modifying values of various parameters 9 Output ON Controls the main output signal In model 4033 the output status is ON when display shows Out and the button lights up In Model 4034 display will show On next to ch and or ch indicators depending on which channel is selected to be on 10 Channel Output model 4034 Dual BNC independent channel outputs 50 of pulse signal 11 Output ON model 4033 Controls the main output signal The output status is ON when illuminated 12 Channel Output model 4033 BNC channel output 50 Q 13 Syne Out model 4033 Sync output 50 5V TTL level Sync out for dual channel model 4034 is located in the rear panel of the instrument 14 CHAN Key model 4034 only Channel select key 15 MAN TRIG Key Sends manual trigger pulse when pushed requires instrument to be in manual trigger mode 16 ENTER Key Used for confirming parameter adjustments and settings 3 2 Display Window The pulse generator has a graphical LCD display that can display up to 160 x 80 dots When you power on the unit a parameter Frequency and its current settings appear in the display The bottom displays a menu that corresponds to the function parameter or mode display selected 50 00 MHz 5 WID 10 0 ns DEL O D ns a DUTY m Nj 52 Figure 3 2 LCD Display Screen 1 Channel Output
20. separated from each other by the colon For instrument control commands the mnemonics are specified by the SCPI standard and indicate the tree structure of the command set The first mnemonic indicates the subsystem being controlled Common Command and Query Program Headers consist of a single mnemonic prefixed by an asterisk The mnemonics consist of upper or lower case alpha characters Mnemonics may be written in either the long form in which the entire mnemonic is written out or the short form in which only a specified portion of the mnemonic is written out Some mnemonics have only one form due to their short length Where a command is described the portion appearing in upper case is the short form Only the short form or the long form may be used Example The command to set the period to 1 microsecond may be written in the following ways SOURCE PULSE PERIOD 1US SOUR PULS PER 1US SOURCE PULSE PERIOD 1US Some mnemonics in a specified Program Header may be optional This is indicated in the command description by the mnemonic being enclosed in square brackets This means it is not necessary to write the mnemonic into the Program Header it is a default condition The SOURCE mnemonic for example is optional Not specifying it will cause the device to search for the mnemonics in the Program Header under the Source Subsystem For example the period may be set by the command PULS PER 1US 39 4 9 2 2 Progra
21. set indicates that part or all of a response message is ready to be read 4 5 3 Response Messages The device sends a Response Message in response to a valid query All queries return a single Response Message Unit and all query responses are generated at the time the query is parsed 4 5 4 Coupled Commands Coupled Commands are either commands whose execution validity depends on the value of other parameters or commands whose execution changes the value of another parameter The execution of commands designated as being coupled is deferred until all other commands in the same Program Message have been executed The coupled commands are then grouped together according to their functionality and executed as a group All parameters of the pulse generator are coupled 4 6 Instrument Identification The IDN common query is used to read the instrument s identification string The string returned is something similar to the following B amp K MODEL 4034 0 V0 40 4 7 Instrument Reset The RST common command effects an instrument reset to the factory default power up state 4 8 Self Test The TST common query causes the device to perform a self test This self test consists of checking the functionality of the pulse generator 38 4 9 Command Syntax 4 9 1 General Command Structure The device commands are generally defined by the SCPI standard with the exception of those instrument functions for which SCPI commands do not as yet
22. standard for connecting data terminal equipment DTE to data communication equipment DCE Data terminal equipment is usually devices such as terminals computers or printers that are the final destination for data Data communication equipment on the other hand is usually a modem or other device that converts the data to another form and passes it through The instrument can be configured only as a DCE so in most cases it can be connected with a straight through cable to a computer but would require special cabling to connect to another DCE device The baud rate is the bit rate during the transmission of a word in bits per second Different devices use many baud rates but the baud rates of the two devices that are connected must be the same The instrument can be set to different baud rates ranging from 1200 to 115 000 as described in Section 3 Operating Instructions Data signals over the RS 232 C use a voltage of 3V to 25V to represent a zero called a space and a voltage of 3V to 25V to represent a one called a mark Handshake and control lines use 3V to 25V to indicate a true condition and 3V to 25V to indicate a false condition When no data is being transmitted the idle state of the data lines will be the mark state To transmit a byte the transmitting device first sends a start bit to synchronize the receiver 4 16 2 RS 232 C Operation The RS 232 C standard is not very specific about many of the handshaking signals and
23. the time interval between the 50 points of the actual pulse depends on both the WIDTH and TRANSITION TIME settings A trailing edge slower or faster than the leading edge respectively lengthens or shortens the 50 interval In effect the pulse edges pivot about the first and third corners while the interval between these corners remains fixed for a given width setting As long as the leading and trailing edge times are equal the selected width and the actual width are the same 31 In the SINGLE or DOUBLE pulse mode the instrument defines PERIOD as the time between the 50 points on the leading edges of two consecutive trigger outputs DELAY in double pulse mode is the time between the leading edges of the first and second pulse using as a reference point 50 amplitude with fastest transition times SETTLING TIME is the interval required for the pulse level to enter and remain in the specified level ACCURACY RANGE measured from the 90 AMPLITUDE point 3 14 Pulse Parameter Limitations The following formulas express the limits on Period Width and Delay Single Pulse per Period Modes Un delayed Delayed Counted Burst with single pulse mode Period Width Delay must be gt 10 ns 0 99 Period must be gt Width Delay Pulse max Pulse min Width max Width min Delay max Delay min 10 00 s Width Delay 10 ns but not less than 20 ns Period 0 99 Delay 10 ns but not more than 9 89999 s
24. trigger source for use in the Trigger Gate and Burst trigger modes COMMAND TYPE SETTING Syntax Arguments Type Options Examples QUERY Syntax Response 4 12 3 3 Burst Count Setting or Query TRIGger SOURce lt ws gt lt option gt Character MANual Front panel MAN key BUS GPIB trigger GET or TRG INTernal Internal trigger EXTernal External trigger TRIG SOUR BUS TRIG SOUR INT TRIGger SOURce MAN I BUS INT EXT Used to set the number of cycles to be output in the BURST mode It is not a standard SCPI command COMMAND TYPE SETTING Syntax Arguments Type Range Rounding Examples QUERY Syntax Response Examples Setting or Query TRIGger BURSt lt ws gt lt value gt NRf 2 to 999999 To integer value TRIG BURS 100 TRIGger BURSt NRf TRIG BURSt 4 12 3 4 Internal Trigger Rate Sets the rate of the internal trigger COMMAND TYPE SETTING Syntax Setting or Query TRIGger TIMer lt ws gt lt value gt units 60 Arguments Type Units Range Rounding Examples QUERY Syntax Examples Response NRf S seconds MS milliseconds US microseconds NS nanoseconds 100NS to 99 99S To current resolution TRIG TIM 10E 6 TRIG TIM 500US TRIGger TIMer TRIG TIM NR3 4 12 3 5 External Trigger Level Used to control the trigger level of the external trigger COMMAND TYPE SETTING Syntax Arguments
25. 10ns Period 0 99 Width 10 ns but not more than 9 89998 s 0 Single Pulse Transition Time Restrictions Width must be gt 1 3 Leading Edge Period Width must be gt 1 3 Trailing Edge Double Pulse per Period Modes Paired Pulse and Counted Burst with Paired pulses Delay must be gt Width 0 99 Delay must be gt Width 10 ns Pulse max Pulse min Width max Width min Delay max 10 00 s Width Delay 10 ns but not less than 40 ns 0 99 Delay 10 ns but not gt 4 85000 s 10ns Period 0 99 Width 10 ns but not gt 9 80000 s 32 Delay min Width 10 ns Double Pulse Transition Time Restrictions Width must be gt 1 3 Leading Edge Delay Width must be gt 1 3 Trailing Edge Period Delay Width must be gt 1 3 Trailing Edge Internal Trigger Burst Mode 0 99 Trig Rate must be gt Period Burst Count 3 15 Pulse Definitions TRIG OUTPUT 4 3 Corner HIGH LEVEL 90 AMPLITUDE 50 LOW LEVEL TRAILING EDGE Pulse Definitions High and Low Levels 33 TRIG OUTPUT 50 gt DELAY gt gt FASTEST TRANSITION TIMES SELECTED ACTUAL VARIABLE TRANSITION TIMES SELECTED 1 Corner Pulse Definitions Width Period and Delay TRIG OUTPUT 50 H4 PERIOD 4
26. 28 FS 3C POBuffer lt NRf gt Oct Dec 040 041 042 043 044 045 046 047 050 051 052 053 054 055 056 057 060 061 062 063 064 065 066 067 070 071 072 073 074 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 VERSion ASCII SP amp SY a VOU 3 Msg MLAO MLAI MLA2 MLA3 MLA4 5 MLA6 MLA7 MLAS MLA9 MLA10 MLA12 MLA13 14 15 MLA16 17 MLA18 MLA19 MLA20 MLA21 MLA22 MLA23 MLA24 MLA25 MLA26 MLA27 MLA28 67 1D 1E 1F Hex 40 41 42 43 44 45 46 47 48 49 4A 4B 4 4 4E 4F 50 51 52 53 54 55 56 57 58 59 5A 5B 5C 035 29 GS 036 30 RS 037 31 US Message Definitions DCL Device Clear GET Group Execute Trigger GTL Go To Local LLO Local Lockout MLA My Listen Address Oct Dec ASCII Msg 100 64 MTAO 101 65 A 1 102 66 B MTA2 103 67 104 68 D MTA4 105 69 E 5 106 70 6 107 71 MTA7 110 72 H MTA8 111 73 I MTA9 112 74 J MTA10 113 75 K 11 114 76 L MTA12 115 77 M MTA13 116 78 N MTA14 117 79 O MTA15 120 80 MTA16 121 81 Q MTA17 122 82 R MTA18 123 83 S MTA19 124 84 T MTA20 125 85 U MTA21 126 86 V MTA22 127 87 W MTA23 130 88 X MTA24 131 89 Y MTA25 132 90 Z MTA26 133 91 MTA27 134 92 MTA28 3D 3E MSA MTA PPC PPD Hex 60 61 62 63 64 65 66 67
27. 4 DELAY WIDTH FASTEST TRANSITION TIMES SELECTED d 3 Corner 3 Corner VARIABLE TRANSITION TIMES SELECTED 1 Corner 71 Pulse Definitions Period and delay Double Pulse Mode 34 ACCURACY RANGE 90 AMPLITUDE SETTLING TIME 10 AMPLITUDE Pulse Definitions Settling Time Section 4 Programming 4 1 Overview 4 1 1 GPIB This section provides detailed information on programming the pulse generator via the IEEE 488 bus GPIB General Purpose Interface Bus The pulse generator is programmable over the IEEE 488 bus and its message protocol is compatible with IEEE 488 2 The device command set is compatible with the SCPI 1992 0 standard The SCPI standard does not cover all the needs of the pulse generator and so the standard has been added where necessary The command syntax as defined by the IEEE 488 2 and SCPI standards is briefly explained in the following sections Users who have experience programming GPIB instruments may skip these paragraphs and go directly to where the individual command syntax is given Users wishing to gain further insight should consult the standards 4 1 2 RS 232 C Be sure that you have the Remote Mode set to RS 232 and correctly set the baud rate 35 EIA standard RS 232 C specifies the electrical characteristics and pin out of a serial communication standard for connecting data terminal equipment DTE to data communicati
28. 68 69 6A 6B 6C 6D 6E 6F 70 71 72 73 74 75 76 77 78 79 7 7 7 075 61 MLA29 076 62 gt MLA30 077 63 UNL My Secondary Address My Talk Address Parallel Poll Configure Parallel Poll Disable Oct Dec ASCII Msg 140 96 3 MSAO PPE 141 97 a MSA1 PPE 142 98 b MSA2 PPE 143 99 c MSA3 PPE 144 100 d MSA4 PPE 145 101 MSAS PPE 146 102 f MSA6 PPE 147 103 g MSA7 PPE 150 104 h MSA8 PPE 151 105 i MSA9 PPE 152 106 j MSA10 PPE 153 107 k MSA11 PPE 154 108 1 MSA12 PPE 155 109 m MSA13 PPE 156 110 n MSA14 PPE 157 111 o MSA15 PPE 160 112 p MSA16 PPD 161 113 q MSA17 PPD 162 114 r MSA18 PPD 163 115 MSA19 PPD 164 116 t MSA20 PPD 165 117 u MSA21 PPD 166 118 MSA22 PPD 167 119 w MSA23 PPD 170 120 x MSA24 PPD 171 121 y MSA25 PPD 172 122 7 MSA26 PPD 173 123 MSA27 PPD 174 124 MSA28 PPD 68 5D 135 93 MTA29 7D 175 125 MSA29 PPD SE 136 94 MTA30 TE 176 126 MSA30 PPD 5F 137 95 _ UNT 177 127 DEL Message Definitions PPE Parallel Poll Enable SPE Serial Poll Enable PPU Parallel Poll Unconfigure TCT Take Control SDC Selected Device Clear UNL Unlisten SPD Serial Poll Disable UNT Untalk 4 16 RS 232 Programming 4 16 1 General The INSTALLATION section of this manual describes the RS 232 C connection for the instrument Be sure that you have the Remote Mode set to RS 232 and correctly set the baud rate EIA standard RS 232 C specifies the electrical characteristics and pin out of a serial communication
29. Display Displays the current selected channel when highlighted For model 4034 only Also displays highlighted text Out On when output is ON For model 4033 or displays a highlighted text On next to Ch 1 and or Ch 2 when either or both channel outputs are ON For model 4034 2 General Waveform Display 16 Displays the general waveform being generated in the channel Note Waveform shown is approximated and scaled down It does not show the exact representation of the waveform at the output 3 DEL Mode Display Displays delay setting of the pulse Alternatively it can also display other parameters in other menu items 4 Menu Functions Display Displays the menu options available Use F1 F5 keys on front panel to select the options 5 Secondary Parameter Display Displays the values of parameters selected in the menu Depending on the options chosen various parameters will display with a cursor for adjusting their values For example width or duty cycle can be displayed 6 Main Parameter Display Displays the main parameter value When highlighted it can be adjusted with numeric keypad or rotary knob It can for example adjust frequency or period 7 Mode Display Displays the current mode of the generator This can be the trigger mode of the power supply 3 3 Front Panel Controls The front panel controls select display and change parameter function and mode settings Use the rotary input knob and the
30. MMAND TYPE Common Command or Query Syntax ESR Response NRI 4 11 4 4 PSC Power On Status Clear Command This command is used to control the automatic power on clearing of certain status functions COMMAND TYPE Common Command or Query COMMON COMMAND Syntax PSC lt ws gt lt Boolean gt Arguments Type Boolean Examples PSC ON or PSC 1 PSC OFF or PSC 0 QUERY Syntax PSC Response ASCII 0 for OFF ASCII 1 for ON When set to ON 1 the Service Request Enable Register and the Standard Event Status Enable Register are cleared on power on 4 11 4 5 SRE Service Request Enable Command This command sets the Service Request Enable Register bits COMMAND TYPE Common Command or Query COMMON COMMAND Syntax SRE lt ws gt lt NRf gt Arguments Type NRf Range 0 to 255 Non integer arguments are rounded before execution The value of bit 6 is ignored and is set always to zero Examples SRE 48 Enables reporting of ESB and MAV events QUERY Syntax SRE Response NRI f STB Status byte query This query is used to read the value of the Status Byte COMMAND TYPE Common Query Syntax STB Response NRI 47 The value of the Status Byte read with the STB query may differ from that read with the Serial Poll Bit 6 of the STB will be set as long as a reason for requesting service exists while bit 6 of the STB as read by the Serial Poll is cleared by the Serial Poll 4 11 5 Device
31. PHIGH and PLOW commands COMMAND TYPE Setting only SETTING Syntax SOURce VOLTage LEVel IMMediate PREDefined ws option Arguments Type Character Options CMOS TTL ECL USER Examples VOLT PRED ECL 4 12 1 7 High Voltage Limit This command is used to set the high limit of the pulse COMMAND TYPE Setting or Query SETTING Syntax SOURce VOLTage LIMit HIGH lt ws gt lt high limit gt units Arguments Type NRf Units MV V default Range 9 5V to 10V Rounding To 10 Examples VOLT LIM HIGH 4V QUERY Syntax SOURce VOLTage LIMit HIGH Examples VOLT LIM HIGH Response NRf CONSIDERATIONS The high limit cannot be set to less than the high level 4 12 1 8 Low Voltage Limit This command is used to set the low limit of the pulse COMMAND TYPE Setting or Query SETTING Syntax SOURce VOLTage LIMit LOW ws low limit gt units Arguments Type NRf Units MV V default Range 10 to 9 5V Rounding To 10mV Examples VOLT LIM LOW 4V 52 QUERY Syntax SOURce VOLTage LIMit LOW Examples VOLT LIM LOW Response NRf CONSIDERATIONS The low limit cannot be set greater than the low level 4 12 1 9 Pulse Period This command is used to set or query the period of the pulse COMMAND TYPE Setting or Query SETTING Syntax SOURce PULSe PERiod ws period units Arguments Type NRf Units S seconds MS milliseconds US microseconds NS nano
32. PULSe TRANsition LEADing ws lead time gt units Arguments 56 Type NRf Units S seconds MS milliseconds US microseconds NS nanoseconds Range SNS to 10 5 Rounding To current resolution Examples PULS TRAN LEAD 50NS PULS TRAN 85NS QUERY Syntax SOURce PULSe TRANsition LEADing Examples PULS TRAN LEAD Response NRf CONSIDERATIONS The allowed value of the leading edge time is limited by the values of the period width and delay In addition the ratio between the transition times is limited to a maximum of 20 1 and both transition times must be in one of the following ranges Sns to 100ns 50ns to 1 us 500ns to 10us Sus to 100us 50us to lms 500us to 10ms 4 12 1 18 Trailing Edge Time This command is used to set the value of the trailing edge time If the edge tracking feature is ON changing the trailing edge will cause the same change in the leading edge COMMAND TYPE Setting or Query SETTING Syntax SOURce PULSe TRANsition TRAiling lt ws gt lt trail time units Arguments Type NRf Units S seconds MS milliseconds US microseconds NS nanoseconds Range SNS to 10 5 Rounding To current resolution Examples PULS TRAN TRA 50NS PULS TRAN TRAiling 85NS QUERY Syntax SOURce PULSe TRANsition TRAiling Examples PULS TRAN TRA Response NRf CONSIDERATIONS The allowed value of the trailing edge time is limited by the values of the period width and delay In addi
33. Type Units Range Rounding Examples QUERY Syntax Examples Response 4 12 3 6 Trigger Slope Setting or Query TRIGger LEVel lt ws gt lt trigger level units NRf V mV 10V to 10V with 10mV resolution OV allowed 10mV TRIG LEV 5 56 TRIGger LEVel TRIG LEV NR3 This command is used to set the external trigger slope on which to trigger COMMAND TYPE SETTING Syntax Arguments Type Options Examples OUERY Syntax Examples Response Setting or Ouery TRIGger SLOPe lt ws gt lt Options gt Character POSitive NEGative TRIG SLOP POS TRIG SLOP NEG TRIGger SLOPe TRIG SLOP POS NEG 61 4 12 4 Status Subsystem This subsystem controls the SCPI defined status reporting structures which are the QUEStionable and OPERation status registers and the error event queue The QUEStionable and OPERation status registers are mandated by SCPI and so are implemented but are not used by the hardware No status is ever reported through them and they are not detailed in this manual The following shows the STATus structure used STATus PRESet QUEue NEXT 4 12 4 1 Status Preset This command is used to set certain status values to defined values OPERation and QUEStionable enable registers are cleared The Positive transition filters are set to 32767 The Negative transition filters are set to 0 Since the Questionable and Operation status registers a
34. Type Numeric Range 0 to 99 Rounding integer value Examples SYST POB 99 QUERY Syntax SYSTem POBuffer lt ws gt MINimum MAXimum Response Power on buffer in NR1 format 4 13 IEEE 488 1 Interface Messages 4 13 1 GET Group Execute Trigger The GET is used by the pulse generator as a trigger when it is in either the TRIGGER GATE or BURST modes with the trigger source set to BUS It has the same effect as the TRG common command 4 13 2 DCL Device Clear In response to the DCL the PG does the following a Clears the input buffer and the output queue b Resets the Message Processing Functions 4 13 3 SDC Selected Device Clear The response is as for the DCL message when device is addressed to listen 4 13 4 LLO Local Lockout Sending LLO when device is addressed to listen and controller is asserting the REN line will put the device into Remote with Lock out state locking out the front panel 64 4 14 SCPI Command Tree 4 14 1 Root Node Root SOURce OUTPut TRIGger STATus SYSTem 4 14 2 SOURce Subsystem SOURce FREOuency VOLTage PULSe CW FIXed uus LEVel it lt NRf gt LP vel IMMediate HIGH IOW lt NRf gt lt NRf HIGH 1 ne ao PREDefined lt lt NRf gt lt NRf gt NRf NRf TTLICMOS IECLIUSER PERiod DELay EACCuracy POLarity Ae lt NRf gt lt Boolean gt NORMal COMPLement INVerted WIDTh EWIDth HOLD lt NRf gt
35. al NBRST Number of Bursts PREV EXTWID SETUPS RECALL STORE o CLEAR ALL UTIL o GPIB ACTIVE GPIB Address RS232 ACTIVE Baudrate INTEN o POWER Power On Setup 3 6 1 PARAMETER Menu This key selects and displays the waveform frequency amplitude offset and external reference and allows changing the parameter data eee 10 0000 BS DUTY 30 0 DELO 0000 F3 OTH DEL AY SIMGLE FREG DUTY LII ELE Frequency Menu F1 PERIOD FREQ Selects and displays the period or the pulse frequency Change the values using the cursor keys rotary knob or numerical keys If a certain setting can t produce the waveform at the desired parameters the generator displays an error message While the 20 F2 WIDTH DUTY F3 DELAY F4 INDEP CH1 5 SINGLE DOUBLE pulse mode is set to external width on the value of the period may be changed but the value is not displayed since the actual value of the period is set by the external pulse Selects and displays the pulse width and duty cycle The minimum value of the width is 10ns with the maximum value dependent on the values of the period delay and transition times The Duty Cycle is defined as the ratio of the pulse width to the pulse period Changing the duty cycle will therefore change the width accordingly The duty cycle has both a value and a state on or off On Power On the duty cycle is off This means that the width is determined by the w
36. anged Commands that do not affect the signal being output by the instrument are accepted The difference between the LOCS and the LWLS is that from the LWLS the device may enter the Remote With Lockout State 4 2 3 Remote State REMS In the REMS the device may be operated from the GPIB Actuating any front panel key will cause the device state to revert to the LOCS 4 2 4 Remote With Lockout State RWLS In the RWLS the device is operable only from the GPIB Front panel operation may be returned by either sending an appropriate IEEE 488 1 command or by cycling the device power 4 3 Interface Function Subsets The following interface function subsets are implemented in the pulse generator 5 T6 SR1 DTI E2 CO 4 4 Device Address The GPIB address of the device may be set to any value from 0 to 31 The address may be changed from the front panel using the numeric keypad or the rotary encoder or via the GPIB itself using the command SYSTem COMMunicate GPIB ADDRess Setting the device to address 31 puts it in the off bus state In this state it will not respond to messages on the GPIB If the device is in the REMS when set to address 31 an internal return to local command will be given setting the device to the LOCS If the device is in the RWLS the return to local command is ignored and the device remains in the RWLS The only way to then re establish communication with the device ov
37. at power on as described earlier in this section The factory default settings are Power on Default Settings Key Functions Values Comments PERIOD 500 ns Pulse Period WIDTH 200 ns Pulse Width DELAY 0 5 Pulse delay from Sync out DPDELAY 5 us Delay between pulses in double pulse mode HILVL 25V Pulse high level LOLVL 2 5 Pulse low level MODE CONT Pulse mode N BURST 2 Waves per burst SLOPE POS Positive external trigger slope TLVL 1V External trigger level TRIG SOURCE MAN Trigger source INT TRG RATE 1 ms Internal trigger rate OUPTUT OFF Output disabled PULSE MODE Normal Normal single pulse output MODULATION OFF Modulation execution RISE 5 ns Pulse rise time FALL 5 ns Pulse fall time Table 3 2 NOTE Power on settings cannot restore the status of output at power on meaning if the output is ON power on settings cannot recall it to be ON at start up This setting will always remain OFF and power on which is same as the default setup indicated above in Table 3 2 Although the output status can be stored into memory for recall using the store recall functions it cannot be recalled for a power on setting start up This is due to safety concerns as sensitive devices that are connected to the outputs of the generator may accidentally be damaged at power on if the power on configurations are not set properly i e Amplitude level set too high for power on may easily da
38. cause the device to actively request service This is achieved using the Service Request Enable Register which is an 8 bit register whose bits correspond to those of the STB The RQS bit in the STB is set when a bit in the STB is set and its corresponding bit in the service request enable register is set The service request enable register is set using the SRE common command and read using the SRE common query 41 4 10 3 Standard Event Status Register The Standard Event Status Register SESR is defined by IEEE 488 2 It is implemented in the pulse generator as a byte whose bits have the following definitions Bit 0 Operation Complete OPC This bit is set in response to the common command being executed Bit 1 Request Control RQC Not implemented in the PG Bit 2 Query Error QYE This bit is set when either the controller is attempting to read data from the device when none is available or when data prepared for the controller to read has been lost Bit 3 Device Specific Error DDE This bit is set to indicate that a device operation did not execute due to some device condition Bit 4 Execution Error EXE This bit is set when the device could not execute a command due to the command being outside of its capabilities For example a parameter being out of range Bit 5 Command Error CME This bit is set to indicate an error in the command syntax Bit 6 User Request This bit is not used by th
39. condition which if not followed correctly could result in damage to or destruction of part or all of the product WARNING Do not alter the ground connection Without the protective ground connection all accessible conductive parts including control knobs can render an electric shock The power jack and mating plug of the power cable meet IEC safety standards WARNING avoid electrical shock hazard disconnect power cord before removing covers Refer servicing to qualified personnel CAUTION Before connecting the line cord to the AC mains check the rear panel AC line voltage indicator Applying a line voltage other than the indicated voltage can destroy the AC line fuses For continued fire protection replace fuses only with those of the specified voltage and current ratings CAUTION This product uses components which can be damaged by electro static discharge ESD To avoid damage be sure to follow proper procedures for handling storing and transporting parts and subassemblies which contain ESD sensitive components Compliance Statements Disposal of Old Electrical amp Electronic Equipment Applicable in the European Union and other European countries with separate collection systems This product is subject to Directive 2002 96 EC of the European Parliament and the Council of the European Union on waste electrical and electronic equipment WEEE and jurisdictions adopting that Directive is marked as being put
40. d from the lower impedance source encounters a voltage attenuation A1 which is greater than 1 and less than 2 as follows 2 72 A signal E2 applied from the higher impedance source 72 encounters a greater voltage attenuation A2 which is greater than and less than 2 72 71 E2 RI 2 1 El R2 Zl In the example of matching 500 to 1250 PULO NET 125 and 2298299 pua 64 66 50 12 The illustrated network can be modified to provide different attenuation ratios by adding another resistor less than R1 between Z1 and the junction of R1 and R2 When constructing such a device the environment surrounding the components should also be designed to provide smooth transition between the impedances Acceptable performance can be obtained with discrete components using short lead lengths however a full coaxial environment is preferred The characteristic impedance of a coaxial device is determined by the ratio between the outside diameter of the inner conductor to the inside diameter of the outer conductor expressed as Nt Je Z0 2 8 3 Rise Time Measurements in Linear Systems Consider the rise time and fall time of associated equipment when measuring the rise time or fall time of a linear device If the rise time of the device under test is at least ten times slower than the combined rise times of the instrument the monitoring oscilloscope and associated cables the error introduced wil
41. delay gt units Arguments Type NRf Units S seconds MS milliseconds US microseconds NS nanoseconds Range ONS to 9 800005 Rounding current resolution Examples PULS DELay 25NS PULS DEL 200E 9 QUERY Syntax SOURce PULSe DELay Examples PULS DEL Response NRf CONSIDERATIONS The allowed range of the delay will be determined by the values of the period width and transition times 4 12 1 12 Pulse Duty Cycle This command is used to set the duty cycle of the pulse Once the duty cycle has been set it is considered to be ON and then changes in the period will automatically cause changes in the width such that the duty cycle is kept constant The duty cycle is set OFF by either setting the pulse width or by the PULSE HOLD WIDTH command Querying the duty cycle when it is off will return the value zero 0 COMMAND TYPE Setting or Query SETTING Syntax SOURce PULSe DCYCle ws duty units Arguments Type NRf Units None Range 1 to 99 Rounding To 0 1 Examples PULS DCYC 25 QUERY 54 Syntax SOURce PULSe DCY Cle Examples PULS DCYC 4 12 1 13 Pulse Hold This command is used to determine whether the width or the duty cycle are to be held constant when the period is changed The duty cycle is termed to be ON when changes in the period cause changes in the width such that the duty cycle remains constant This state is achieved by specifying the DCYCle parameter in the HOLD command The dut
42. e pulse generator Bit 7 Power On PON This bit is set when the device is powered on The SESR is queried using the ESR common query The SESR is paired with an enable register the Standard Event Status Enable Register SESER This register enables one or more events in the SESR to be reflected in the Status Byte ESB summary message bit The bits of the SESER correspond to those of the SESR Setting a bit in the SESER enables the corresponding event to set the ESB bit when it occurs The SESER is set with the ESE common command and queried with the ESE command query 4 10 4 The Error Queue The error queue is used to store codes of errors detected in the device It is implemented as a cyclic buffer of length 10 When the error queue is not empty bit EVQ in the Status Byte is set The error queue is read with either one of the following two queries SYSTEM ERROR STATUS OUEUE NEXT The first error in the gueue is returned and the gueue is advanced 4 10 5 Error Codes The negative error codes are defined by SCPI Positive codes are specific to the PG The error message is returned in the following form lt error number gt lt error description gt A table of error numbers and their descriptions is presented here No error reported 0 Noerror 4 10 5 1 Command Errors 42 A command error is in the range 199 to 100 and indicates that a syntax error was detected This includes the case of an unrecognized header The
43. e pulse low level voltage PREDEF Selects predefined pulse output levels In addition to being able to set the levels to any value within the limits the user may also select one of four pre defined levels CMOS Low level LOLVL 0 V High level HILVL 5 V TTL Low level LOLVL 0 4 V High level HILVL 2 4 V ECL Low level LOLVL 1 8 V High level HILVL 0 8 V USER User defined levels entered by using the USER menu F5 HIPRED and LOPRED Press OUTPUT to exit USER menu PERIOD 10 0000 pS Predef a Predefined Output Menu F5 OUTPUT LIMITS Allows entering limits for the output levels to protect external devices connected to the unit output PERIOD 10 0000 pS Hi Limit 10 0 7 Ord LOLI PREU ee AA Output Limits Menu F1 LIM OF Turns off limit level protection F2 LIM ON Turns on limit level protection HILIM Sets high limit for protection F4 LOLIM Sets low limit for proection 5 PREV Returns to previous menu level 3 6 3 PULSE Menu PERIOD 10 0000 pS EDGES 53 00 n RISE FALL TH MORE Pulse Menu F1 RISE Selects the pulse Rise time Leading edge F2 FALL Selects the pulse Fall time Trailing edge F3 EQUAL Selects equal Rise Leading edge and Fall Trailing edge times F5 NORMAL COMPL Selects Normal or Complement pulse mode 23 PERIOD 10 0000 BS EDGES 5 00 5 PT an
44. el 1 501 Trigger rate short on channel 2 510 Output overload on channel 1 511 Output overload on channel 2 Trigger rate short means that the period of the waveform is larger than the value of the internal trigger rate Thus not every trigger will generate a cycle or burst of the waveform 4 11 IEEE 488 2 Common Commands and Queries 4 11 1 System Data Commands The identification query command IDN enables unique identification of the device over the GPIB It returns a string with four fields Manufacturer name Model name Serial number 0 if not relevant Version number 4 11 2 Internal Operation Commands 4 11 2 1 RST Reset Command The Reset command resets the device and returns it to the factory default power up state Command Type Common Command Syntax RST 4 11 2 2 TST Self Test Query The self test query causes an internal self test to be performed This test consists of checking the status of the period pulse and output cards Command Type Common Query Syntax TST Response ASCII 0 if test passes ASCII 1 if test fails 4 11 3 Synchronization Commands 4 11 3 1 OPC Operation Complete Command The operation complete command causes the device to generate the operation complete message in the Standard Event Status Register on completion of the selected device operation Command Type Common Command Syntax OPC Examples PULS PER 1US OPC 45 The OPC command and the OPC query described below
45. er the GPIB is to cycle the power and to then change the address to that required from the front panel 4 5 Message Exchange Protocol The device decodes messages using the Message Exchange Protocol MEP defined in IEEE 488 2 The following functions implemented in the MEP must be considered 4 5 1 The Input Buffer 37 The device has a 128 byte long cyclic input buffer Decoding of remote messages begins as soon as the input buffer is not empty that is as soon as the controller has sent at least one byte to the device Should the input buffer be filled up by the controller faster than the device can remove the bytes and decode them the bus handshake is not completed until room has been made for more bytes in the buffer This prevents a fast controller from overrunning the device with data If the user has sent part of a Program Message but not the Program Message Terminator and wishes to abort the message decoding and execution the Device Clear command may be sent or front panel operation resumed in REMS only 4 5 2 The Output Queue The device has a 100 byte long output queue in which it stores response messages for the controller to read If at the time a response message is formatted the queue contains previously formatted response messages such that there are not enough places in the queue for the new message the device will put off putting the message in the queue until there is place for it The Status Byte MAV bit when
46. erent impedance in a transmission line generates a reflection back along the line to the source The amplitude and polarity of the reflection are determined by the load impedance in relation to the characteristic impedance of the cable If the load impedance is higher than the characteristic impedance of the line the reflection will be of the same polarity as the applied signal If it is lower the reflection will be of opposite polarity These reflections add or subtract from the amplitude of the incident pulse causing distortion and irregular pulse shapes Impedance matching network that provides minimum attenuation A simple resistive minimum attenuation impedance matching network that can be used to match the instrument output into relatively low impedance is shown in the above figure To match impedance with the illustrated network the following conditions must exist R1 Z2 R2 _ Z2 R2 and Rig 2162 71 R2 Therefore 11 R2 Zl Z2 and Z1 R2 72 71 or Rl Z2 Z2 71 and Z2 R2 Z1 _ 22 71 For example to match 50Q system to 125Q system 71 equals 500 72 equals 1250 Therefore R1 4125 125 50 968 Q and R2 50 MUN 64 60 125 50 Although the illustrated network provides minimum attenuation for a purely resistive impedance matching device the attenuation as seen from one end does not equal that seen from the other end A signal E1 applie
47. etup indicated above in Table 3 2 Although the output status can be stored into memory for recall using the store recall functions it cannot be recalled for a power on setting start up This is due to safety concerns as sensitive devices that are connected to the outputs of the generator may accidentally be damaged at power on if the power on configurations are not set properly i e Amplitude level set too high for power on may easily damage a sensitive device by accident Use this key to control the main output signal A build in LED lights when the output is active 3 8 Cursor Movement Keys Use these keys to move the cursor when visible either left or right They are used in conjunction with the rotary input knob to set the step size of the rotary input knob 3 9 Rotary Input Knob Use this knob to increase and decrease numeric values or to scroll through a list The cursor indicates the low order position of the displayed value which changes when you rotate the knob for straight numeric entries only For other types of data the whole value changes when you rotate the knob 3 10 Power On Settings 29 At power on the pulse generator performs a diagnostic self test procedure to check itself for errors When the pulse generator finishes the diagnostic self test routine it enters the local state LOGS and assumes power on default settings if the POWER ON setting is at 0 You can program the pulse generator for any settings you want
48. exist The Common Commands and Queries are defined by IEEE 488 2 The command syntax i e how a command is structured is defined by IEEE 488 2 4 9 2 The Program Message A Program Message is defined as a string containing one or more Program Message Units each of which is an instrument command or query Program Message Units are separated from each other by the Program Message Unit Separator The Program Message is terminated by the Program Message Terminator The Program Message Unit Separator consists of a semicolon optionally preceded and or followed by white space characters A white space character is defined as the ASCII characters in the ranges 00H 09H and OBH 20H This range includes the ASCII control characters and the space but excludes the Linefeed character The Program Message Terminator consists of optional white space characters followed by one of three options Linefeed LF character ASCII 0A GPIB EOI bus line being set true on the last byte of the message LF being sent with EOI true The Program Message Unit can be divided into three sections as follows 4 9 2 1 Program Message Header The Program Header represents the operation to be performed and consists of ASCII character mnemonics Two types of Program Headers are used in the pulse generator Instrument control headers and Common Command and Query headers A Program Header may consist of more than one mnemonic in which case the mnemonics are
49. for frequency Seconds for time and Volts for voltage To set the period to 1 microsecond we can send one of the following commands PULS PER 1E 6 or PULS PER 1000NS The special forms of character data accepted as numbers as defined by SCPI are NOT accepted by the pulse generator There are two types of Program Message Units Command Message Units and Query Message Units A Query differs from a Command in that the Program Header is terminated with a question mark For example the period might be queried with the following query PULS PER Not all Program Message units have query forms such as STATUS PRESET and some Program Message Units might have only the query form such as SYSTEM VERSION The pulse generator puts the response to the query into the output queue from where it may be read by the controller The Status Byte bit is set to indicate to the controller that a response is ready to be read 4 9 3 SCPI Command Structure SCPI commands are based on a hierarchical structure This allows the same instrument control header to be used several times for different purposes providing that the mnemonic occurs in a unique position in the hierarchy Each level in the hierarchy is defined as a node Mnemonics in the different levels are separated from each other by a colon The first Program Message Unit command in a Program Message is always referenced to the root node Subsequent commands are referenced to the
50. i Complement Pulse Mode The transition time range is 5 ns to 100 ms but the value is limited to a 20 1 ratio between the transition times In addition both values must be within one of the following ranges 5 ns 100 ns 50 ns 1 us 500 ns 10 us 5 us 100 us 50 us 1 ms 500 us 10 ms 5 ms 100 ms The transition times are also limited by the values of the period width and delay 24 3 6 4 MODE Menu Selects the output trigger mode CONT Continuous TRIG Triggered GATE Gated BRST Burst and EXTWID External pulse To select the output mode press MODE then press the function key that corresponds to the desired Mode menu option as shown PERIOD 10 0000 pS Cont Mode Menu F1 CONT Continuous Selects continuous output F2 TRIG Triggered Triggers one output cycle of the selected pulse for each trigger event GATE Gated Triggers output cycles as long as the trigger source asserts the gate signal BRST Burst Triggers output output cycles for each trigger event where ranges from 2 to 999 999 F5 EXTWID In the external width EXT WID pulse mode the pulse period and width are determined by the externally applied signal The pulse generator then applies transition and level parameters to this signal in order to generate the pulse The period width and delay may be changed but their change has no effect on the pulse and their values a
51. idth parameter only The duty cycle is set to ON by entering a value The value may then be changed using the rotary encoder or the numeric keys When the duty cycle is on changing the period will cause a change in the width such that the duty cycle is kept constant The duty cycle is set to OFF by changing the width value The instrument will store the last value of the duty cycle and set the duty cycle to this value when it is next set to ON The duty cycle has an absolute range of 1 to 99 but the actual value is limited by the values of the period delay and transition times This parameter is used in two instances The first is to set the delay of the pulse in the single pulse mode The delay governs the time from the SYNC signal to the start of the pulse The second instance is the double pulse mode Here the delay governs the time from the SYNC pulse to the beginning of the second pulse The minimum and maximum values of the delay are dependent on the values of the period width and leading and trailing edge times The delay range is 0 to 9 80000 s PERIOD 10 0000 pS Wit 3 0000 P3 0 0000 BS FERODO OTH Dus feu FREQ DUTY DOVELE Delay Menu When channel 2 is selected using the CHAN button this menu option will appear By default it is selected in INDEP which makes channel 2 an independent channel If is selected channel 2 and channel 1 will have matching clock and trigger The period and frequency will al
52. ignal trigger and the second pulse 55 is generated after a programmable delay This delay is set by either the PULSE DELAY or the PULSE DOUBLE DELAY command COMMAND Setting or Query SETTING Syntax SOURce PULSe DOUBle STATe lt ws gt lt Boolean gt Arguments Type Boolean Examples PULS DOUB ON PULS DOUB STAT OFF QUERY Syntax SOURce PULSe DOUBle STATe Examples PULS DOUB Response 011 4 12 1 16 Double Pulse Delay This command is used to set the delay of the second pulse from the time of the trigger in the double pulse mode It has exactly the same effect as the PULSE DELAY command and is included in the command set for compatibility purposes COMMAND TYPE Setting or Query SETTING Syntax SOURce PULSe DOUBle DELay ws delay units Arguments Type NRf Units S seconds MS milliseconds US microseconds NS nanoseconds Range ONS to 9 800008 Rounding To current resolution Examples PULS DOUB DELay 150NS QUERY Syntax SOURce PULSe DOUBle DELay Examples PULS DOUB DEL Response NRf CONSIDERATIONS The allowed range of the delay will be determined by the values of the period width and transition times 4 12 1 17 Leading Edge Time This command is used to set the value of the leading edge time If the edge tracking feature is ON changing the leading edge will cause the same change in the trailing edge COMMAND Setting or Query SETTING Syntax SOURce
53. l not exceed 1 and usually may be ignored If the rise time or fall time of the test device is less than ten times slower than the combined rise times of the testing system determine the actual rise time of the device under test by using the following formula Rt Rt Rn 4 Rt equals the overall rise time or fall time of the entire measurement system and R1 R2 R3 etc are the rise times or fall times of the individual components in the system 2 9 RS 232 Connection The rear panel RS 232 connector is a standard DB 9 male connector configured as a DCE The pin assignments are defined in the table below DB 9 pin Name Note 13 TXD Transmit Data 1 2 3 RXD Receive Data 4 2 5 GND Signal ground 6 2 7 RTS Request to Send 8 CRS Clear to send 9 Note Use Null modem or cross over cable pin 2 and 3 switched in order to communicate with instrument 2 10 RS 232 Configuration The instrument use 8 data bits 1 stop bit no parity and baud rate selectable from 2400 to 115K 2400 4800 9600 19200 38400 57600 115200 By default the instrument is set at 19200 8 N 1 Note If 115K baudrate speed is used ensure that the RS232 cable is short and can support this speed Otherwise there may be some instability and intermittent data transmission failure between the interfacing computer and the instrument 2 11 GPIB Address The address can be changed from
54. longs and the hierarchy within that subsystem When the command is to be referred to the Root node it should be prefixed with a colon Mnemonics appearing in square brackets are optional The T character is used to denote a choice of specifications The lt ws gt is used to denote a white space character 48 4 12 1 SOURce Subsystem The Source Subsystem controls the frequency voltage and pulse characteristics The command structure is as follows SOURce FREQuency CWIFIXed lt NRf gt Tage LEVel IMMediate HIGH lt NRf gt LOW lt NRf gt PREDefined TTLICMOSIECLIUSER PHIGh lt NRf gt PLOW lt NRf gt HIGH lt NRf gt LOW lt NRf gt PULSe PERiod lt NRf gt WIDTh lt NRf gt DELay lt NRf gt DCYCle lt NRf gt HOLD WIDThIDCY Cle EWIDth lt Boolean gt DOUBle STATe Boolean DELay lt NRf gt TRANsition LEADing lt NRf gt TRAiling lt NRf gt AUTO lt Boolean gt IONCE POLarity NORMalICOMPlementlINVerted COUP MODEL 4034 ONLY To control channel 2 change the subsystem from SOUR to SOUR2 For example to check pulse period of channel 2 send the command SOUR2 PULS PER 4 12 1 1 Frequency The frequency command controls the frequency of the pulse in the continuous trigger mode It is the inverse of the period COMMAND TYPE Setting or Query SETTING Syntax SOURce FREQuency CWIFIXed ws frequency units Arguments Type NRf Units MH
55. m Message Header Separator The Program Header Separator is used to separate the program header from the program data It consists of one or more white space characters denoted as lt ws gt Typically it is a space 4 9 2 3 Program Message Data The Program Data represent the values of the parameters being set for example the 1US in the above examples Different forms of program data are accepted depending on the command The Program Data types used in the pulse generator are as follows 1 Character program data This form of data is comprised of a mnemonic made up of lower or upper case alpha characters As with Program Header mnemonics some Character Data mnemonics have short and long forms Only the short or the long form may be used Boolean data Boolean data indicate that the parameter can take one of two states ON or OFF The parameter may be character type ON or OFF or numeric A numeric value is rounded to an integer A non zero result is interpreted as 1 ON and a zero result as 0 OFF Queries return the values 0 or 1 NRf This is a decimal numeric data type where NRI indicates an integer number NR2 indicates a fixed point real number and NR3 indicates a floating point real number All parameters that have associated units accept a suffix which may be specified using upper or lower case characters When the suffix is not specified the numeric value is accepted in the default units which are Hertz
56. mage a sensitive device by accident 3 11 Memory The pulse generator uses a non volatile FLASH memory for storing front panel settings Up to 100 front panel settings can be stored 3 12 Displaying Errors At power on the waveform generator performs a diagnostic routine to check itself for problems If the diagnostic routine finds an error an error message is displayed The waveform generator also displays error messages when front panel settings are either invalid or may produce unexpected results 30 3 13 Error messages Message Text Setting conflict Trig rate short Empty location Calibration Error LCA load error Output overload Verify unit calibration Incorrect entry Width too high Set other level Save to Flash failed Out of range Cause Can t have this parameter set with other parameters Internal trigger rate too short for pulse or burst Attempt to restore a non existent setting An error when performing unit calibration for service personnel only Internal hardware error must re power the unit An excessive loading of the output stage At power on the unit checks for valid calibration data Need to calibrate the unit A incorrect value entry or syntax error The width value is too high for the pulse period selected When the pulse amplitude is gt 10Vp p need to change the other pulse level When saving the instrument settings Need to save again the setting Attempt to set a value out of instrument limi
57. ments edt ae ep deci Lo ee dk 10 2 7 Grounding Requirements 10 2 8 Signal Connections E ea Pp C D Eee aa Dd Cede eed advent le 10 2 9 RS 292 CONNEC O Ne ian han oe NE EE EOD adi pup cod A a Edd 13 2 10 RS 232 Configuration ere ien e rd n P e da tee Ped ener edle 14 24 GPIB Address iot nee et Cete ted ete dre Cu P Tn hia Cu 14 2 12 GPIB GonnectiOris rco nd net hr o He det C A hh 14 SECHON cte Pm 15 Operating InstFUcllols 15 3 3 General Descriptio e eaa a ata aes ce Me decide 15 3 2 Display WiridOW P lett E net dda een 16 3 3 Front Panel Gontrols 5 ade e qute eda 17 3 4 Back Panel Gontrols oia ni Mea de ages 17 3 5 Output Connectors ee even 19 3 0 MENU KGyS eiit fate Ere TN HP a 19 rae mmm 29 3 8 Cursor Movement Keys 29 3 9 Rotary Inp tKnobD e hte eaten pte ERI ERA mde acs BERE ERR 29 3 10 Power Ori Settlhgs sic sited ati ede aed Er ren epi o e ae Le Na 29 iei ete I apr Na eee 30 3 12 Displaying EOTS icit
58. n 5 V Output 50 ohms Resistance Offset Accuracy 1 25 mV OPERATING MODES Continuous Output continuous at programmed period rate Output quiescent until triggered by internal external GPIB or manual Triggered trigger then generates one cycle at programmed period rate Same as triggered mode except pulses are output for the duration of the Gated gated signal The last cycle started is completed Burst Same as triggered mode for programmed number of cycles from 2 to 999 999 as set by the N BURST function External Width Trigger duration and rate sets pulse width and repetition PULSE FUNCTIONS Single One pulse at each selected period up to 50 MHz repetition rate One pair of pulses at each period up to 25 MHz repetition rate Both pulses Double have the same selected width the position of the second pulse set by the delay control TRANSITION TIMES lt 6 ns to 100 ms variable Leading and trailing edges settable separately Range and limited to 20 1 ratio between settings into one of the following ranges 5ns 100 ns 50 ns 1 0 us 500 ns 10 us 5 0 us 100 us 50 us 1 0 ms 500 us 10 ms 5 ms 100 ms Resolution 3 digits limited to 10 ps Accuracy 5 of setting 2ns lt 5 deviation from a straight line between 10 and 90 points for Linearity S transitions gt 50 ns INTERNAL TRIGGER Range 100 ns to 100 s Resolution 4 digits limited to 100 ns Accuracy 0 01 INPUT AND OUTPUT
59. nd terminations have adequate power handling capabilities If there is a DC voltage across the output load use a coupling capacitor in series with the load The time constant of the coupling capacitor and load must be long enough to maintain pulse flatness Impedance Matching If the waveform generator is driving a high impedance such as the 1 MQ input impedance paralleled by a stated capacitance of an oscilloscope vertical input connect the transmission line to a 50 attenuator a 50 termination and to the oscilloscope input The attenuator isolates the input capacitance of the device and terminates the waveform generator properly 3 6 MENU Keys These keys select the main menus for displaying or changing a parameter function or mode Below is the hierarchy and selections of the menu tree MENU TREE PARAM PERIOD FREQ WIDTH DUTY DELAY INDEP When 2 is selected only SINGLE DOUBLE HILVL LOLVL PREDEF ECL o o o OUTPUT 19 TTL CMOS USER HIPREDILOPRED o OUTPUT LIMITS LIM OF LIM ON HILIM LOLIM PREV PULSE o RISE FALL o EQUAL o NORMICOMPL MODE o CONT o TRIG d MAN Manual Trigger n INT Internal Trigger Rate n EXT External Trigger PREV o MAN Manual Gate Trigger INT Internal Gate Trigger Rate EXT External Gate Trigger PREV o BURST MAN Manual Burst INT Internal Burst Rate EXT Burst Extern
60. nections Use RG58U 50 or equivalent coaxial cables for all input and output signals to and from the instrument Below specifies the BNC connectors on the instrument OUTPUT Up to 10 Vpp into 50 Q impedance 20 Vpp into open circuit The instrument is protected from short circuit to ground TRIG IN 10 impedance selectable positive or negative slope variable level from 10 V to 10 V Input protected to 15 V SYNC OUT A positive pulse signal in phase with the main output TTL levels with a 50 Q source impedance and with 3 5 ns typical transition times 10 2 8 1 Maintaining Pulse Fidelity Due to the extremely fast pulse rise times obtained from the instrument special consideration must be given to preserve pulse fidelity Even at low repetition rates high frequency components are present in the output waveform Use high quality coaxial cables attenuators and terminations Note RG 58 type coaxial cable and typical BNC connectors exhibit impedance tolerances which may cause visible reflections For maximum fidelity use short high quality 50 coaxial cables When signal comparison measurements or time difference determinations are made the two signals from the test device should travel through coaxial cables with identical loss and time delay characteristics When making connections that are not in a 50 environment keep all lead lengths short 1 4 inch or less 2 8 2 Impedance Matching A mismatch or diff
61. nt in the presence of flammable gases or fumes Operation of any electrical instrument in such an environment constitutes a definite safety hazard KEEP AWAY FROM LIVE CIRCUITS Instrument covers must not be removed by operating personnel Component replacement and internal adjustments must be made by qualified maintenance personnel Disconnect the power cord before removing the instrument covers and replacing components Under certain conditions even with the power cable removed dangerous voltages may exist To avoid injuries always disconnect power and discharge circuits before touching them DO NOT SERVICE OR ADJUST ALONE Do not attempt any internal service or adjustment unless another person capable of rendering first aid and resuscitation is present DO NOT SUBSTITUTE PARTS OR MODIFY THE INSTRUMENT Do not install substitute parts or perform any unauthorized modifications to this instrument Return the instrument to B amp K Precision for service and repair to ensure that safety features are maintained WARNINGS AND CAUTIONS WARNING and CAUTION statements such as the following examples denote a hazard and appear throughout this manual Follow all instructions contained in these statements A WARNING statement calls attention to an operating procedure practice or condition which if not followed correctly could result in injury or death to personnel A CAUTION statement calls attention to an operating procedure practice or
62. ol mode After selection the baud rate can be selected as 1200 2400 9600 19200 38400 57600 or 115K Always the RS 232 uses 8 bit data 1 stop bit and no parity Note If 115K baudrate speed is used ensure that the RS232 cable is short and can support this speed Otherwise there may be some instability and intermittent data transmission failure between the interfacing computer and the instrument Selects the intensity of the LCD display Select a value using the rotary input knob Valid numeric values are from to 31 The value is kept in the nonvolatile memory after a 20 seconds 28 F4 POWER 3 7 ON Key time out Power on default Selects the power on default setting Select a value using the data keys or the rotary input knob The selection is effective after a 20s time out period Select zero 0 to have the pulse generator power on with the factory default settings Select 99 to have the pulse generator power on with the settings it had at the last power off Select any other value in the range from 1 to 98 to have the pulse generator power on with the settings that you have saved with SETUPS STORE in the range 1 to 99 PERIOD 10 0000 pS Power On 0 Default Setup Power On Menu NOTE Power on settings cannot restore the status of output at power on meaning if the output is ON power on settings cannot recall it to be ON at start up This setting will always remain OFF and power on which is same as the default s
63. on equipment DCE Data terminal equipment is usually devices such as terminals computers or printers that are the final destination for data Data communication equipment on the other hand is usually a modem or other device that converts the data to another form and passes it through The instrument can be configured only as a DCE so in most cases it can be connected with a straight through cable to a computer but would require special cabling to connect to another DCE device The baud rate is the bit rate during the transmission of a word in bits per second Different devices use many baud rates but the baud rates of the two devices that are connected must be the same Data signals over the RS 232 C use a voltage of 3V to 25V to represent a zero called a space and a voltage of to 25V to represent a one called a mark Handshake and control lines use 3V to 25V to indicate a true condition and 3V to 25V to indicate a false condition When no data is being transmitted the idle state of the data lines will be the mark state To transmit a byte the transmitting device first sends a start bit to synchronize the receiver The RS 232 C standard is not very specific about many of the handshaking signals and it is therefore usually necessary to refer to the manuals for both of the devices being connected to determine the exact pin out signal definition and signal direction for the devices The serial interface implements the same
64. on on our website Return all merchandise to B amp K Precision Corp with pre paid shipping The flat rate repair charge for Non Warranty Service does not include return shipping Return shipping to locations in North America is included for Warranty Service For overnight shipments and non North American shipping fees please contact B amp K Precision Corp B amp K Precision Corp 22820 Savi Ranch Parkway Yorba Linda CA 92887 www bkprecision com 714 921 9095 Include with the returned instrument your complete return shipping address contact name phone number and description of problem LIMITED THREE YEAR WARRANTY B amp K Precision Corp warrants to the original purchaser that its products and the component parts thereof will be free from defects in workmanship and materials for a period of three years from date of purchase B amp K Precision Corp will without charge repair or replace at its option defective product or component parts Returned product must be accompanied by proof of the purchase date in the form of a sales receipt To obtain warranty coverage in the U S A this product must be registered by completing a warranty registration form on our website www bkprecision com within fifteen 15 days of purchase Exclusions This warranty does not apply in the event of misuse or abuse of the product or as a result of unauthorized alterations or repairs The warranty is void if the serial number is altered defaced or remo
65. rce s output The OUTPut command controls whether the output is ON or OFF COMMAND TYPE Setting or Query SETTING Syntax OUTPut STATe lt ws gt lt Boolean gt Arguments Type Boolean Examples OUTP STAT ON OUTP OFF QUERY Syntax OUTPut STATe Response 011 MODEL 4034 ONLY To control output of channel 2 change the subsystem from OUTP to OUTP2 For example to turn on output of channel send command OUTP2 STAT ON 4 12 3 Trigger Subsystem The Trigger Subsystem is used to control the waveform triggering It is not all SCPI compatible The command structure is as follows TRIGger MODE CONTinuous TRIGger GATE BURSt BURSt lt NRf gt SOURce lt MANual gt INTernal EXTernal BUS TIMer lt NRf gt LEVel lt NRf gt DELay lt NRf gt SLOPe POSitive NEGative MODEL 4034 ONLY To control the trigger mode of channel 2 change the subsystem from TRIG to TRIG2 For example to check trigger mode of channel 2 send the command 2 MODE 4 12 3 1 Trigger Mode This command is used to set the trigger mode It is not a standard SCPI command COMMAND TYPE Setting or Query SETTING Syntax TRIGger MODE ws option Arguments Type Character Options CONTinuous TRIGger GATE 59 Examples QUERY Syntax Response 4 12 3 2 Trigger Source BURSt TRIG MODE CONT TRIG MODE BURS TRIGger MODE CONT TRIG GATE BURS This command is used to select the
66. re not displayed The trigger mode may not be changed while the external width pulse mode is enabled EXTERNAL PULSE External Pulse 25 After selecting the TRIG GATE or BURST menu the trigger source menu is available For TRIG and GATE mode PERIOD 10 0000 p gt Trig Level 0 00 Wah IMT ExT FFE on Trigger Menu F1 MAN Selects manual as the trigger source Pressing the MAN TRIG key generates the trigger In the Gate trigger mode the pulse is generated as long as the key is being pressed F2 INT Selects the internal trigger generator as the trigger source Change the internal trigger rate displayed with the rotary input knob or numerical keys The rate has a range of 100 ns to 99 99 s although the minimum value is limited by the value of the period in that the rate cannot be less than the period PERIOD 10 0000 pS Trig Rate 10 00 ms Internal Trigger F3 EXT Selects the external trigger signal as the trigger source The trigger source is supplied through the TRIG IN connector F4 LEVEL SLOPE Two parameters are related to external trigger source operation These are LEVEL and SLOPE The Level determines at what voltage level the external signal will be recognized as a trigger At level less than this no pulse will be generated The Slope determines whether the positive or negative edge of the trigger signal will trigger the pulse Use the rotary knob to toggle be
67. re not used in the model 4033 and 4034 the PRESet command has no real effect COMMAND TYPE Setting only SETTING Syntax STATus PRESet 4 12 4 2 Error Queue Read This query returns the first entry in the error queue and removes that entry from the queue Its function is identical to that of the SYSTem ERRor query COMMAND Query only QUERY Syntax STATus QUEue NEXT Response lt error number gt lt error description gt 4 12 5 System Subsystem The SYSTem subsystem collects the functions that are not related to instrument performance The functions implemented in the pulse generator are security GPIB address changing error queue reading SCPI version reading and power on buffer setting not SCPI defined The command structure is as follows SYSTem COMMunicate GPIB ADDRess numeric value ERRor SECurity STATe Boolean POBuffer numeric value 62 4 12 5 1 GPIB Address Change This command is used to set the GPIB address Setting the address to 31 puts the instrument in an off bus state in which it does not take part in communication over the GPIB Communication with the instrument can be resumed only by setting the address to a suitable value from the front panel COMMAND Setting or Query SETTING Syntax SYSTem COMMunicate GPIB ADDRess lt ws gt lt address gt Arguments Type NRf Range 0 to 31 Rounding To integer value Examples
68. red to communicate with a PC via this port 7 Earth GND This screw is the earth ground that is tied to the chassis 8 AC Power Connector Used to connect power cable to AC line source 9 Fuse Box Fuse compartment For replacement use TIA 250V fuse only 10 Cooling Fan To ensure proper cooling please leave room between the fan output and other objects with at least one feet distance 11 SYNC OUT Model 4034 only 50 TTL sync output for channel 1 12 TRIG IN and SYNC OUT Model 4034 only TRIG IN and SYNC OUT BNC connectors for channel 2 SYNC OUT is a50 Q TTL level signal TRIG IN accepts maximum 15 V 3 5 Output connectors The pulse generator output circuits operate as a 50 voltage source working into a 50 load At higher frequencies un terminated or improperly terminated output cause aberrations on the output waveform In addition loads less than 50 reduce the waveform amplitude while loads more than 50 increase waveform amplitude Excessive distortion or aberrations caused by improper termination are less noticeable at lower frequencies To ensure pulse integrity follow these precautions 1 Use good quality 50 coaxial cable and connectors 2 Make all connections tight and as short as possible 3 Use good quality attenuators if it is necessary to reduce pulse amplitudes applied to sensitive circuits 4 Use termination or impedance matching devices to avoid reflections 5 Ensure that attenuators a
69. s impossible to 100 guarantee against loss of stored data you should maintain a record of the data stored in memory so that you can manually restore such data if necessary F1 RECALL F2 STORE F4 CLEAR ALL PERIOD 10 0000 pS Recall 0 Default Set mper Setups Menu Recalls a previously stored front panel setup from the selected buffer Change the buffer number by using the rotary input knob Valid storage buffer numbers are from 1 to 99 Buffer 0 is the factory default setup buffer 100 is the last front panel setup before power off Stores the current front panel setup to the specified storage buffer Change the buffer number by using the data keys or the rotary input knob Valid storage buffer numbers range from 1 to 99 Clears all data on all memory settings after a YES or NO selection message 27 PERIOD 10 0000 pS YOU SURE 3 6 6 UTILITY Menu F1 GPIB F2 RS232 F3 INTEN PERIOD 10 0000 p gt Intensity 10 PIE ITEM 1 Utility Menu Selects the GPIB remote mode of operation After selection the GPIB address can be set to any value from 1 to 31 using the rotary knob The value is kept in a nonvolatile memory and used at power on The factory default address is 10 Setting the address to 31 puts the device in the off bus state it will not respond to messages on the GPIB bus PERIOD 10 0000 p5 GPIB Address GPIB Menu Selects the RS232 remote contr
70. seconds Range 20NS to 10S Rounding current resolution Examples PULS PER 105 PULS PER 400E 6 QUERY Syntax SOURce PULSe PERiod Examples PULS PER Response NRf CONSIDERATIONS The allowed range of the period will be determined by the values of the width delay and transition times 4 12 1 10 Pulse Width This command is used to set or query the value of the pulse width If the duty cycle is ON when the width command is sent it is then set to OFF and changes in the period will no longer affect the width COMMAND TYPE Setting or Query SETTING Syntax SOURce PULSe WIDTh lt ws gt lt width gt units Arguments Type NRf Units S seconds MS milliseconds US microseconds NS nanoseconds Range 10NS to 9 899995 Rounding current resolution Examples PULS WIDT 25NS PULS WIDT 200E 9 QUERY Syntax SOURce PULSe WIDTh 53 Examples PULS WIDT Response NRf CONSIDERATIONS The allowed range of the width will be determined by the values of the period delay and transition times 4 12 1 11 Pulse Delay This command is used to set the delay from the trigger signal to the start of the pulse in single pulse mode Although there exists a separate command for the double pulse delay both commands affect the same delay and so this command will also determine the time between the two pulses in the double pulse mode COMMAND TYPE Setting or Query SETTING Syntax SOURce PULSe DELay lt ws gt lt
71. so be the same as channel 1 In this mode all triggering options will not be available in the MODE menu as it will be dependent on channel 1 settings Frequency and Period adjust options will also be disabled Aside from these all other parameters are still adjustable The unit can be set to generate either a SINGLE pulse or a DOUBLE pulse In the double pulse mode the first pulse is generated without delay from the start and the second pulse in generated after a delay from the start of the period as determined by the DELAY parameter Thus in order to generate a double pulse the delay must first be set and then the double pulse may be set on The double pulse mode state is toggled using the F5 key The minimum and maximum values of the delay are dependent on the values of the period width delay and transition parameters 21 PERIOD 10 0000 p gt 3 0000 BS 2 0000 BS PERIOD DELAY FREQ DUT Double Pulse 3 6 2 OUTPUT Menu The Output menu enables the pulse high and low levels to be set The levels are limited by four factors The absolute limits are 10 V The high level must be greater than the low level The pulse amplitude must be between 0 1 V and 10 V p p into 50 The levels cannot exceed the limits as set in the OUTPUT LIMITS menu PERIOD 10 0000 BS 5 00 Sv LO EvE 0 00 Output Menu HILVL Selects the pulse high level voltage F2 LOLVL Selects th
72. t to change without notice For the most current and correct data please visit www bkprecision com MODELS 4033 4034 CHANNELS I 2 FREQUENCY 0 1 Hz to 50 MHz TIMING CHARACTERISTICS PERIOD Range single pulse 20 ns to 10 s 50 MHz to 0 1 Hz repetition rate Range double 40 ns to 10 s 25 MHz to 0 1 Hz repetition rate pulse Resolution Up to 6 digits limited to 10 ps Accuracy 0 01 Jitter lt 0 01 of setting 20 ps on Period Width and Delay WIDTH Range 10 ns to Period 10 ns Resolution Up to 6 digits limited to 100 ps Accuracy 0 5 of setting 500 ps Double Pulse 0 5 of setting 3 ns for the second pulse DELAY Range Ons to Period Width 10 ns Resolution Up to 6 digits limited to 100 ps Accuracy 0 5 of setting 500 ps DUTY Range 1 to 99 CYCLE Resolution 3 digits 0 1 Accuracy Limited by width and pulse accuracy OUTPUT CHARACTERISTICS AMPLITUDE High Level 9 90 V to 10 V into 50 ohms load 19 80 V to 20 V into open circuit Range Low Level 10 V to 9 90 V into 50 ohms load 20 V to 19 80 V into open circuit Range Amplitude Range 0 1V to 10V p p into 50 ohms load 20 Vp p max into open circuit Resolution 3 digits limited to 10 mV Accuracy 1 of setting 10 mV into 50 ohms Aberrations lt 5 20 mV into 50 ohms load for pulse levels betwee
73. the front panel by using the UTILITY menu 2 12 GPIB Connections The rear panel GPIB connector is an AMPHENOL 57 10240 or equivalent and connects to a standard IEEE 488 bus cable connector The GPIB line screens are not isolated from chassis and signal ground 1 2 3 4 5 6 7 8 9 10 11 12 14 Section 3 Operating Instructions 3 1 General Description This section describes the displays controls and connectors of the Model 4033 and 4034 Pulse Generators All controls for the instrument local operation are located on the front panel The connectors are located on both front and rear panels Model 4033 Figure 3 1 Front Panel View 1 Power ON OFF Applies and removes AC power to the unit 2 Display Window Displays all instrument data and settings on a LCD 3 FI F5 Keys Select the menu options that appear on the bottom section of the LCD display 4 Menu Keys Select menu options for waveform parameters PARAM output levels OUTPUT pulse edges PULSE triggering modes setup 15 configurations SETUP and utility options UTIL 5 Numerical Keypad Numeric entry keys for entering values for various functions and modes 6 Unit Setting Keys Quick keys for setting units for frequency time and amplitude 7 Rotary Knob Used to increment decrement numerical values or to scan through the possible selections 8 Cursor Keys Used to move the cursor when visible to either left
74. tion the ratio between the transition times is limited to a maximum of 20 1 and both transition times must be in one of the following ranges 5ns to 100ns 50ns to 1 us 57 500ns to 10us Sus to 100us 50us to 1ms 500us to 10ms 4 12 1 19 Pulse Polarity This command is used to control the polarity of the pulse which may be normal or complemented The COMPement and INVerted parameters are aliases either may be used COMMAND TYPE Setting or Query SETTING Syntax SOURce PULSe POLarity lt ws gt lt Option gt Arguments Type Character Options Normal polarity COMPlement complemented INVerted complemented Examples PULS POL NORM PULS POL INVerted QUERY Syntax SOURce PULSe POLarity Examples PULS POL Response NORM COMP 4 12 1 20 Channel Dependency This command is used to control the dependency of channel 2 It can select either for channel 2 to be an independent channel or set it to be dependent on channel 1 This means that channel 2 will have the same clock and trigger as well as same frequency and period as channel 1 COMMAND Setting or Query SETTING Syntax SOURce COUP lt Option gt Arguments Type Character Options ON or 1 Dependent on channel 1 OFF or 0 Independent Examples SOUR COUP 1 SOUR COUP OFF QUERY Syntax SOURce COUP Examples SOUR COUP Response 110 58 4 12 2 OUTPut Subsystem The Output Subsystem controls characteristics of the sou
75. tion 1 Introduction 1 1 Introduction This manual contains information required to operate program check and maintain the 50 MHz programmable pulse generator 1 2 Description The Model 4033 and 4034 are a high performance programmable pulse generators The instrument generates pulse with a repetition rate to 50 MHz width from 10 ns variable delay variable transition times and amplitude The pulses can be output in continuous triggered gated or burst mode with an internal or external trigger signal The model 4033 and 4034 can be remotely operated via RS232 or GPIB interface bus and is SCPI compatible 1 3 Safety Remarks The model 4033 and 4034 are SAFETY CLASS 1 instruments Before operation review the safety summary at the beginning of the manual 1 4 Package Contents The following list of items and accessories come in the package 1 4033 or 4034 Pulse Generator 2 AC power cord 3 CD containing user manual 4 Test report and certificate of calibration 5 RS 232 Serial Cable Specifications NOTE Specifications listed in manual are applicable after a powered 30 minute warm up into a 50 O load All timing characteristics are measured at 50 of amplitude with fastest edge Specifications are verified according to the performance check procedures Specifications not verified in the manual are either explanatory notes or general performance characteristics only Specifications and information is subjec
76. ts or in conflict with other pulse parameters Pulse Definitions The figures illustrate the various pulse parameter definitions Pulse HIGH LEVEL corresponds to the most positive level of the pulse Pulse LOW LEVEL corresponds to the most negative level of the pulse Pulse AMPLITUDE is defined as the difference between the HIGH LEVEL and LOW LEVEL values Transition time LEADING or TRAILING EDGE is the interval required for the pulse to go from 10 to 90 of the selected amplitude or vice versa The way in which the instrument defines pulse parameters makes a distinction between the selected pulse which assumes the fastest transition times and the actual pulse output The values specified for WIDTH PERIOD and DELAY are defined with reference to the point at which the selected pulse reaches 50 of the amplitude during the leading and trailing edges at the fastest transition time WIDTH is the time interval between the 50 points of the leading and trailing edges If the selected leading and trailing edge transition times are equal the time interval between the 50 points is the same as that between the first and third corners PERIOD is the time between the 50 points on the rising edges of two consecutive trigger outputs DELAY is the time between the 50 points on the rising edge of the TRIG OUTPUT pulse and the 50 point of the leading edge of the output pulse at fastest transition time When VARIABLE TRANSITION TIMES are selected
77. tus Data Structure By examining the content of the STB the controller gains some information concerning the instrument s status The STB bits are defined as follows Bit 0 Bit 1 Bit 2 Bit 3 Bit 4 Bit 5 Bit 6 Bit 7 Unused Unused Error event queue summary message EVQ This bit is set if the queue is not empty Questionable Status summary message This bit is not used by the pulse generator Message Available MAV summary message This bit is set whenever all or part of a message is available for the controller to read The controller may be ready to read the response message before it is available in which case it can either wait until this bit is set or it can start to read In the second case the controller time out must be set so that the read action will not be aborted before the message has been read Event Status Bit ESB summary message This bit is set to indicate that one or more of the enabled standard events have occurred Request Service RQS This bit is set when the device is actively requesting service Operation Status summary message No Operation Status events are defined in the pulse generator and so this bit is never set The STB is read by the controller during a serial poll If the RQS bit was set it is then cleared The STB may also be read by the STB common query 4 10 2 Service Request Enabling Service request enabling allows the user to select which Status Byte summary messages may
78. tween the two selections For Burst Mode F1 MAN Selects manual as the trigger source Pressing the MAN TRIG key generates the trigger In the Gate trigger mode the pulse is generated as long as the key is being pressed F2 INT Selects the internal trigger generator as the trigger source Change the internal trigger rate displayed with the rotary input knob or numerical keys The rate has a range of 100 ns to 26 99 99 s although the minimum value is limited by the value of the period in that the rate cannot be less than the period F3 EXT Selects the external trigger signal as the trigger source The trigger source is supplied through the TRIG IN connector F4 NBRST Selects the number of burst cycles to burst Set from 2 to 999 999 cycles F5 LEVEL SLOPE Two parameters are related to external trigger source operation These are LEVEL and SLOPE The Level determines at what voltage level the external signal will be recognized as a trigger At level less than this no pulse will be generated The Slope determines whether the positive or negative edge of the trigger signal will trigger the pulse Use the rotary knob to toggle between the two selections 3 6 5 SETUPS Menu The pulse generator can store the current front panel settings and recall them into one of 99 storage buffers When you recall a setup the pulse generator restores the front panel settings to those that you stored in the selected buffer Because it i
79. ved B amp K Precision Corp shall not be liable for any consequential damages including without limitation damages resulting from loss of use Some states do not allow limitations of incidental or consequential damages So the above limitation or exclusion may not apply to you This warranty gives you specific rights and you may have other rights which vary from state to state B amp K Precision Corp 22820 Savi Ranch Parkway Yorba Linda CA 92887 www bkprecision com 714 921 9095 70 71 BK PRECISION 22820 Savi Ranch Parkway Yorba Linda CA 92887 www bkprecision com 2010 B amp K Precision Corp V112210
80. y cycle is set OFF by specifying the WIDTH parameter and then changes in the period will not affect the width When setting the duty cycle OFF the last value is remembered which is the value the duty cycle takes when it is next set ON COMMAND TYPE Setting or Query SETTING Syntax SOURce PULSe HOL D lt ws gt lt option gt Arguments Type Character Options WIDTh DCYCle Examples PULS HOLD WIDTh PULS HOLD DCYC OUERY Syntax SOURce PULSe HOLD Examples PULS HOLD Response WIDT DCYC 4 12 1 14 External Width This command is used to enable or disable the external width function When enabled ON this function causes an externally applied pulse to be generated with the same width but with transition times and output levels as specified by the instrument When the external width is enabled the pulse parameter period width delay and duty cycle may not be specified Doing so will cause error 221 to be returned Also the double pulse mode may not be enabled while the external width is enabled COMMAND TYPE Setting or Query SETTING Syntax SOURce PULSe EWIDth lt ws gt lt Boolean gt Arguments Type Boolean Examples PULS EWID ON PULS EWID OFF QUERY Syntax SOURce PULSe EWIDth Examples PULS EWID Response 011 4 12 1 15 Double Pulse State This command is used to enable or disable the double pulse mode In this mode two pulses are generated per period The first pulse is generated at the time of the s
81. z kHz Hz default 49 Range 0 1Hz to SOMHz Rounding the resolution of the range Examples FREO 5KHZ 5E3 OUERY Syntax SOURce FREOuency CWI FIXed Examples FREQ Response NR3 CONSIDERATIONS FIXed is an alias for CW 4 12 1 2 High Voltage Level This command is used to set the high level of the pulse COMMAND TYPE Setting or Query SETTING Syntax SOURce VOLTage LEVel IMMediate HIGH lt ws gt lt high level gt units Arguments Type NRf Units MV V default Range 9 5V to 10V Rounding To 10mV Examples VOLT HIGH 4V QUERY Syntax SOURce VOLTage LEVel IMMediate HIGH Examples VOLT HIGH Response NRf CONSIDERATIONS 1 The high level must be greater than the low level 2 The difference between the levels must conform to 0 5V lt difference x 10V 3 The high level may not exceed the high limit 4 12 1 3 Low Voltage Level This command is used to set the low level of the pulse COMMAND TYPE Setting or Query SETTING Syntax SOURce VOLTage LEVel IMMediate LOW ws low level units Arguments Type NRf Units MV V default Range 10V to 9 5V Rounding To 10mV Examples VOLT LOW OUERY Syntax SOURce VOLTage LEVel IMMediate LOW 50 Examples VOLT LOW Response NRf CONSIDERATIONS 1 The high level must be greater than the low level 2 The difference between the levels must conform to 0 5V lt difference lt 10V

4033 & 4034 Pulse Generator User Manual

Contents

Download Pdf Manuals

Related Search

Related Contents

4033 &amp; 4034 Pulse Generator User Manual

Contents

Download Pdf Manuals

Related Search

Related Contents

4033 & 4034 Pulse Generator User Manual