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Agilent Technologies 66319b User's Manual

1. Reset the instrument viPrintf instrumentHandle RST n turn on the output viPrintf instrumentHandle OUTP 1 n Set output voltage 2V and current 1A levels turn output on viPrintf instrumentHandle VOLT 5lg CURR 5lg n 2 0 1 0 Measure the dc voltage level at the output terminals viQueryf instrumentHandle MEAS VOLT n lf amp measvoltage Measure the dc current level at the output terminals viQueryf instrumentHandle MEAS CURR n l1f amp meascurrent printf Output Voltage f Output Current f n measvoltage meascurrent configure dc source for dynamic measurements change sweep parameters viPrintf instrumentHandle SENS SWE TINT 5l1g POIN 1d OFFS POIN ld n 31 2E 6 sampling rate 31 2us 256 sweep size 256 points 4 pre trigger offset 4 points 125us setup the voltage sensing triggered measurement parameters voltage trigger level to 2 75V hysteresis band to 0 1V positive slope trigger count acquisition triggered by measurement 169 D Example Programs viPrintf instrumentHandle SENS FUNC VOLT n viPrintf instrumentHandle TRIG ACQ LEV VOLT 5lg n 2 75 viPrintf instrumentHandle TRIG ACQ HYST VOLT 51lg n 0 1 viPrintf instrumentHandle TRIG ACQ SLOP
2. OUTP RI MODE LATC LIVE OFF 89 7 Programming the DC Source Discrete Fault Indicator DFI The discrete fault indicator is an open collector logic signal connected to the rear panel FLT connection that can be used to signal external devices when a fault condition is detected To select the internal fault source that drives this signal use OUTPut DFI SOURce QUEStionable OPERation ESB RQS OFF To enable or disable the DFI output use OUTPut DFI STATe ON OFF Using the Inhibit Fault Port as a Digital I O You can configure the inhibit fault port to provide a digital input output to be used with custom digital interface circuits or relay circuits As shipped from the factory the port is shipped for inhibit fault operation You can change the configuration of the port to operate as a general purpose digital input output port with the following command SOURce DIGital FUNCtion RIDFi DIGio The following table shows the pin assignments of the mating plug when used in RI DFI mode as well as Digital I O mode Refer to Table A 2 for the electrical characteristics of the port Pin FAULT INHIBIT DIGITAL T O Bit Weight fe 1b FLT Output OUT 0 Doo 0 a FLT Output OUT 1 a i INH Input IN OUT 2 4 INH Common not programmable To program the digital I O port use SOURce DIGital DATA lt data gt where the data is an integer from 0 to 7 that sets
3. 1 10 01 The 14565 Remote Front Panel has been removed from Table 2 2 The Maximum current range parameter has been changed from Max to 3A throughout the manual Performance testing information has been added to Appendix B 10 03 01 The Current Sink and Resistance Tests performance procedures have been corrected in Appendix B 4 22 02 Mains Input Ratings have been corrected in Table A 2 Figure E 1 has been corrected in Appendix E 5 02 03 Information about the external measurement trigger input has been added to all chapters This capability is only available on units with firmware revisions A 03 3 and up Corrections have also been made to the test record cards in Appendix B for ISO 17025
4. Table 8 2 Common Commands Syntax CLS ESE lt n gt KSE ESR IDN OPC OPC OPT PSC lt bool gt PSC RCL lt n gt RST SAV lt n gt SRE lt n gt SRE STB TRG TST WAI Clear status Standard event status enable Return standard event status enable Return event status register Return instrument identification Enable operation complete bit in ESR Return a 1 when operation complete Return option number Power on status clear state set reset Return power on status clear state Recall instrument state Reset Save instrument state Set service request enable register Return service request enable register Return status byte Trigger Perform selftest then return result Hold off bus until all device commands done Programming Parameters The following table lists the output programming parameters Table 8 3 Output Programming Parameters Value o SOUR CURR LEV TRIG aaa SOUR CURR2 LEV TRIG 10 of MAXimum value SOUR VOLT LEV IMM and SOUR VOLT LEV TRIG 0 15 535 V SOUR VOLT PROT LEV 0 22 V SOUR VOLT2 LEV IMM and SOUR VOLT2 LEV TRIG 0 12 25 V SOUR RES LEV IMM and SOUR RES LEV TRIG 40 mQ 1 Q SENS CURR RANG 0 02A range 0 20 mA 1A range 20mA 1A 3A range 1 A MAX RST Current Range Value MAXimum 95 8 Language Dictionary Calibration Commands Calibration commands let you enable and disable
5. g Adjust the transformer to the highest rated line voltage h Record the output current reading again The difference in the current readings in steps f and h is the CC source effect and should not exceed the values listed in the performance test record card under CC Source Effect CC Noise performance Periodic and random deviations PARD in the output combine to produce a residual ac current as well as an ac voltage superimposed on the dc output Constant current CC PARD is specified as the rms output current in a frequency range 20 Hz to 20 Mhz with the dc source in CC operation a Turn off the dc source and connect the load monitoring resistor and rms voltmeter as shown in Figure B 1b The current monitoring resistor may have to be substituted by one with a higher resistance and power rating such as a 1 ohm 50W to get the RMS voltage drop high enough to measure with the RMS voltmeter Leads should be as short as possible to reduce noise pick up An electronic load may contribute ripple to the measurement so if the RMS noise is above the specification a resistive load may have to be substituted for this test b Check the test setup for noise with the dc source turned off Other equipment e g computers DVMs etc may affect the reading c Turn on the dc source and program the current to full scale and the output voltage to the maximum programmable value Vmax in Table B 2 d The output current should be at the fu
6. PSC ON clears the Standard Event enable register at power on ESR reads and clears the Standard Event event register The PON Power On Bit The PON bit in the Standard Event event register is set whenever the dc source is turned on The most common use for PON is to generate an SRQ at power on following an unexpected loss of power To do this bit 7 of the Standard Event enable register must be set so that a power on event registers in the ESB Standard Event Summary Bit bit 5 of the Service Request Enable register must be set to permit an SRQ to be generated and PSC OFF must be sent The commands to accomplish these conditions are PSC ORE ESE 128 SRE 32 Status Byte Register This register summarizes the information from all other status groups as defined in the ZEEE 488 2 Standard Digital Interface for Programmable Instrumentation See Table 7 1 for the bit configuration Command Action STB reads the data in the register but does not clear it returns MSS in bit 6 serial poll clears RQS inside the register and returns it in bit position 6 of the response 87 7 Programming the DC Source The MSS Bit This is a real time unlatched summary of all Status Byte register bits that are enabled by the Service Request Enable register MSS is set whenever the dc source has one or more reasons for requesting service STB reads the MSS in bit position 6 of the response but does not clear any of the bits in the
7. The OVP circuit contains a crowbar SCR which effectively shorts the output of the dc source whenever the OVP trips However if an external current source such as a battery is connected across the output and the OVP is inadvertently triggered the SCR will continuously sink a large current from the battery possibly damaging the dc source To avoid this you can either disable the OVP circuit or you can connect an external protection diode in series with the output of the dc source Connect the anode of the diode to the output terminal The OVP circuit s SCR crowbar has also been designed to discharge capacitances up to a specific limit which is 50 000 uF If your load capacitance approaches this limit it is recommended that you do not intentionally trip the OVP and discharge the capacitance through the SCR as part of your normal testing procedure as this may lead to long term failure of some components Programmable Voltage Protection In addition to the automatic overvoltage protection circuit the dc source includes programmable voltage protection for output 1 This feature lets you limit the maximum allowable output voltage that can be programmed either from the front panel or over the GPIB This feature is useful in situations where accidentally programming higher output voltages within the operating range of the dc source can permanently damage the phone under test For example suppose that a phone under test which requires the output
8. To offset the beginning of the acquisition buffer relative to the acquisition trigger use SENS SWE OFFS POIN lt offset gt The range for the offset is 4095 to 2 000 000 000 points As shown in the figure when the offset is negative the values at the beginning of the data record represent samples taken prior to the trigger When the value is 0 all of the values are taken after the trigger Values greater than zero can be used to program a delay time from the receipt of the trigger until the data points that are entered into the buffer are valid Delay time offset x sample period NOTE If during a pre trigger data acquisition a trigger occurs before the pre trigger data count is completed the measurement system ignores this trigger This will prevent the completion of the measurement if another trigger is not generated Programming the Status Registers Status register programming lets you determine the operating condition of the dc source at any time For example you may program the dc source to generate an interrupt SRQ when an event such as a current limit occurs When the interrupt occurs your program can act on the event in the appropriate fashion Figure 7 8 shows the status register structure of the dc source Table 7 1 defines the status bits The Standard Event Status Byte and Service Request Enable registers and the Output Queue perform standard GPIB functions as defined in the ZEEE 488 2 Standard Dig
9. VorAMIN 100 millisecond acquisition time Figure 5 5 Default Front Panel Measurement Parameters All models have three current measurement ranges that can be selected in the Input menu A maximum current range is available for measuring output currents of up to 7 amperes A 1 A current range is available for measuring currents up to 1A A 0 02A current range is available for improved resolution when measuring output currents below 20 milliamperes The low current measurement range is accurate to 0 1 of the reading 2 5 microamperes When the current Range is set to AUTO the unit automatically selects the range with the best measurement resolution NOTE In the 0 02A current measurement range the current detector is fixed at DC With the current detector in dc accurate current measurements cannot be made on waveforms with frequency contents over 1 kilohertz Use the Meter menu for making front panel measurements Action Display 1 On the Function keypad press Meter and press VW repeatedly to access the following measurement parameters e dc voltage and current lt reading gt V lt reading gt A peak voltage lt reading gt V MAX minimum voltage lt reading gt V MIN high level of a voltage pulse waveform lt reading gt V HIGH low level of a voltage pulse waveform lt reading gt V LOW rms voltage lt reading gt V RMS peak current lt reading gt A MAX minimum current lt reading gt A MIN high level of a current p
10. A serial poll clears RQS but not MSS When MSS is set it indicates that the dc source has one or more reasons for requesting service Table 8 8 Bit Arana of Status A A Bit Posion 7 6 s RQS Bit Weigh Aa e e ESB Event status e summary OPER Operation status summary MAV Message available QUES Questionable status summary MSS Master status summary RQS Request for service Query Syntax STB Returned Parameters lt NR1 gt Register binary value TRG This common command generates a trigger when the trigger subsystem has BUS selected as its source The command has the same affect as the Group Execute Trigger lt GET gt command Command Syntax TRG Parameters None Related Commands ABOR INIT TRIG IMM lt GET gt TST This query causes the dc source to do a self test and report any errors 0 indicates that the dc source passed self test 1 indicates that one or more tests failed Selftest errors are written to the error queue see Appendix C Query Syntax TST Returned Parameters lt NRI gt WAI This command instructs the dc source not to process any further commands until all pending operations are completed Pending operations are as defined under the OPC command WAI can be aborted only by sending the dc source an GPIB DCL Device Clear command Command Syntax WAI Parameters None Related Commands OPC OPC 137 Specifications Specifications Table A 1 lists the specif
11. Because the measurement circuits of the DVM are internally referenced to the minus terminal of the main output you must observe the following restrictions in order to guarantee accurate DVM measurements refer to figure 3 7 36V V ii 24V4V 12V4V v 66319D 66321D ar DVM INPUT 4V4V 6V V lead resistance load NOTE The DVM common i mode voltage range is from OUTPUT 4 5Vdc to 25Vdc current voltages outside this range will v i result in erroneous readings Minus terminal lead resistance Figure 3 7 Measuring Circuits Not Powered by the Main Output You cannot measure voltages greater than 25 Vdc with respect to the negative terminal of the main output A situation where this could occur is illustrated by R1 in figure 3 7 which has only a 12 Vdc drop across it but is 36 Vdc Vlead with respect to the negative terminal of the main output You cannot measure voltages less than 4 5 Vdc with respect to the negative terminal of the main output A situation where this could occur is illustrated by R6 in figure 3 7 which has only a 2 Vdc drop across it but is 6 Vdc Vlead with respect to the negative terminal of the main output When calculating the common mode voltage between the point that you wish to measure and the negative terminal of the main output you must also include any voltage drop in the negative load lead For example i
12. Pressing the Shift Error keys will show the error number Selftest error messages appear as ERROR lt n gt where n is a number listed in the following table If this occurs turn the power off and then back on to see if the error persists If the error message persists the dc source requires service Failed Test Error 0 Error 1 Error 2 Error 3 Error 4 Error 5 Error 10 Error 11 to 14 Error 15 Error 80 No error Non volatile RAM RDO section checksum failed Non volatile RAM CONFIG section checksum failed Non volatile RAM CAL section checksum failed Non volatile RAM STATE section checksum failed Table 4 1 Power On Selftest Errors Non volatile RST section checksum failed RAM selftest VDACAIDAC selftest 1 to 4 OVDAC selftest Digital I O selftest error 43 4 Turn On Checkout Runtime Error Messages Appendix C lists other error messages that may appear at runtime Some of these messages will also appear on the front panel when the Prot key is pressed To clear the error you must remove the condition that caused the error and then press the Prot Clear key Table 4 2 Runtime Error Messages Description Overvoltage an overvoltage condition has occurred Overcurrent an overcurrent condition has occurred Overtemperature an overtemperature condition has occurred Remote inhibit a remote inhibit signal has been applied to the RI input sense open a positive sense or load lead is open sense open a negative sense o
13. Use the arrow keys to edit individual digits in the displayed setting Increments the flashing digit Decrements the flashing digit gt Moves the flashing digit to the right Moves the flashing digit to the left Enter Enters the value when editing is complete Use the Function keys and Entry keys to enter a new value NOTE If you make a mistake use the Backspace key to delete the number or press the Meter key to return to meter mode ine 1 0 er Ener EAA AND wA AND AO 8 E Jol AND o oV o wwo 13 1 Quick Reference Front Panel Annunciators CB ic OS oO A E CV CC Unr Dis OCP Prot Cal Shift Rmt Addr Err SRQ Output 1 or output 2 is operating in constant voltage mode Output 1 or output 2 is operating in constant current mode Output 1 or output 2 is unregulated The output is OFF Press the Output On Off key to turn the output on The over current protection state is ON Press the OCP key to turn over current protection off Indicates that the output has been disabled by one of the protection features Press the Prot Clear key to clear the protection condition Calibration mode is ON Scroll to the Cal Off command and press the Enter key to exit the calibration mode The Shift key has been pressed The remote programming interface is active Press the Local key to return the unit to front panel control The interface is addressed to
14. 173 accessories 18 ACDC 107 ACDC current detector 56 57 58 airflow 27 annunciators Addr 46 Cal 46 CC 46 CV 46 Dis 46 Err 46 OCP 46 Prot 46 Rmt 46 Shift 46 SRQ 46 Unr 46 average measurements 75 79 AWG ratings 28 B bus 131 C cables 18 calibration 156 ac current 159 current programming high range 158 current programming low range 158 current programming mid range 158 Index DVM 160 enable 157 equipment 143 error messages 160 GPIB 161 menu 156 output 2 159 password 161 resistance 159 saving 160 setup 144 voltage measurement 157 voltage programming 157 calibration commands 96 CAL CURR 96 CAL CURR MEAS AC 97 CAL CURR MEAS LOWR 96 CAL CURR MEAS R3 96 CAL CURR2 96 CAL DATA 97 CAL DATE 97 CAL DVM 97 CAL LEV 97 CAL PASS 97 CAL SAVE 98 CAL STAT 98 CAL VOLT 98 CAL VOLT PROT 98 CAL VOLT2 98 calibration verification DVM 152 capabilities 19 capacitance compensation 33 HLocal 33 HRemote 33 LLocal 33 LRemote 33 switching 33 capacitor discharge limit 35 CC line regulation 150 CC load effect 150 CC load regulation 150 CC mode 53 54 CC noise 151 CC source effect 151 character strings 67 characteristics 140 checklist 25 checkout procedure 41 cleaning 26 clearing errors 55 clearing protection 55 combine commands common commands 65 from different subsystems 65 root specifier 65 command comp
15. 39 mV Output 2 Front Panel Display Readback Vout2 15 mV Output 2 High Voltage Full Scale 11 936 V Output 2 Front Panel Display Readback Vout2 39 mV Source Effect PARD Ripple and Noise Peak to Peak RMS with phone capacitance lt 6uF OmV e Time in lt 400 us 20 mV CONSTANT CURRENT TESTS 6mV 1 mV Load Effect smy v Current Programming and Readback Output 2 Low Current 0 A 4 5 mA Output 2 High Current Full Scale 1 492 A 4 5 mA 1 508 A Output 2 Front Panel Display Readback Iout2 6 mA Iout2 6 mA Current Sink 0 032A 7 5V Readback 25ma 39m PARD Current Ripple and Noise RMS 0 mA 2 0 mA Load Effect 0 375 mA 0 375 mA Source Effect 0 25 mA 0 25 mA Following a 0 75A to 1 5A load change 155 B Performance Calibration and Configuration Performing the Calibration Procedure NOTE The calibration procedure can only be performed from the front panel or using the SCPI language commands Table B 1 lists the equipment required for calibration Figure B 1 shows the test setup You do not have to do a complete calibration each time If appropriate you may calibrate only the voltage or current and proceed to Saving the Calibration Constants However the voltage or current calibration sequence must be performed in its entirety The following parameters may be calibrated voltage programming and measurement current progr
16. 65 subsystem commands 64 91 triggering nomenclature 73 80 SCPI commands at a glance 16 selecting measurement trigger source 81 selftest errors 43 sense commands 100 108 SENS CURR DET 107 SENS CURR RANG 107 SENS FUNC 108 SENS LEAD STAT 108 SENS PROT STAT 108 SENS SWE OFFS POIN 108 SENS SWE POIN 109 SENS SWE TINT 109 SENS WIND 109 sense open 32 servicing operation status 88 servicing questionable status events 88 setting output trigger system 73 setting resistance 53 setting voltage current 53 54 shorting switch 39 single triggers 74 82 source commands 110 SOUR CURR 114 SOUR CURR PROT STAT 114 SOUR CURR TRIG 115 SOUR CURR2 114 Index SOUR CURR2 TRIG 115 SOUR DIG DATA 115 SOUR DIG FUNC 116 SOUR RES 116 SOUR RES TRIG 116 SOUR VOLT 117 SOUR VOLT PROT 117 SOUR VOLT PROT STAT 118 SOUR VOLT TRIG 118 SOUR VOLT2 117 SOUR VOLT2 TRIG 118 specifications 139 SRD 67 stability with remote sensing 32 standard event status group 87 status bit configurations 86 status byte register 87 status commands 119 STAT OPER COND 119 STAT OPER ENAB 120 STAT OPER NTR 120 STAT OPER PTR 120 STAT OPER 119 STAT PRES 119 STAT QUES COND 121 STAT QUES ENAB 121 STAT QUES NTR 122 STAT QUES PTR 122 STAT QUES 121 status model 85 subsystem commands syntax 92 suffixes 67 support rails 27 system commands 123 SYST ERR 123 SYST LANG 123 SYST VER
17. MEAS Related Commands CAL CURR 96 Language Dictionary 8 CALibrate CURRent MEASure AC This command initiates the calibration of the high bandwidth ac measurement circuit Command Syntax CALibrate CURRent MEASure AC Parameters None Examples CAL CURR MEAS AC CALibrate DATA This command enters a calibration value that you obtain by reading an external meter You must first select a calibration level with CALibrate LEVel for the value being entered Command Syntax CALibrate DATA lt NRf gt Parameters lt external reading gt Unit A amperes Examples CAL DATA 3222 3 MA CAL DATA 5 000 Related Commands CAL STAT CAL LEV CALibrate DATE Use this command to store the date that the unit was last calibrated You can enter any ASCII string up to 10 characters Command Syntax CALibrate DATE lt date gt Parameters lt date gt Examples CAL DATE 3 22 99 CAL DATE 22 3 99 Query Syntax CALibrate DATE Returned Parameters lt SRD gt CALibrate DVM Agilent 66321D 66319D only This command initiates the calibration of the DVM Command Syntax CALibrate DVM Parameters None Examples CAL DVM CALibrate LEVel This command selects the next point in the calibration sequence P1 is the first calibration point P2 is the second calibration point Command Syntax CALibrate LEVel lt point gt Parameters P1 P2 Examples CAL LEV P2 CALibrate PASSword This command lets you change the calibration password A n
18. OUTP and thus the instrument interpreted the second command as OUTP PROT DEL 2 In fact it would have been syntactically incorrect to include the OUTP explicitly in the second command since the result after combining it with the header path would be OUTP OUTP PROT DEL 2 which is incorrect 64 Introduction to Programming 6 Moving Among Subsystems In order to combine commands from different subsystems you need to be able to reset the header path to a null string within a message You do this by beginning the command with a colon which discards any previous header path For example you could clear the output protection and check the status of the Operation Condition register in one message by using a root specifier as follows OUTPut PROTection CLEAr STATus OPERation CONDition The following message shows how to combine commands from different subsystems as well as within the same subsystem VOLTage LEVel 20 PROTection 28 CURRent LEVel 3 PROTection STATe ON Note the use of the optional header LEVel to maintain the correct path within the voltage and current subsystems and the use of the root specifier to move between subsystems Including Common Commands You can combine common commands with system commands in the same message Treat the common command as a message unit by separating it with a semicolon the message unit separator Common commands do not affect the header path you may ins
19. Status Byte register The RQS Bit The RQS bit is a latched version of the MSS bit Whenever the dc source requests service it sets the SRQ interrupt line true and latches RQS into bit 6 of the Status Byte register When the controller does a serial poll RQS is cleared inside the register and returned in bit position 6 of the response The remaining bits of the Status Byte register are not disturbed The MAV Bit and Output Queue The Output Queue is a first in first out FIFO data register that stores dc source to controller messages until the controller reads them Whenever the queue holds one or more bytes it sets the MAV bit 4 of the Status Byte register Determining the Cause of a Service Interrupt You can determine the reason for an SRQ by the following actions Step 1 Determine which summary bits are active Use STB or serial poll Step 2 Read the corresponding Event register for each summary bit to determine which events caused the summary bit to be set Use STAT QUES EVEN STAT OPER EVEN ESR When an Event register is read it is cleared This also clears the corresponding summary bit Step 3 Remove the specific condition that caused the event If this is not possible the event may be disabled by programming the corresponding bit of the status group Enable register or NTRIPTR filter A faster way to prevent the interrupt is to disable the service request by programming the appropriate bit
20. TRIGger SEQuence2 DEFine ACQuire Parameters TRANsient ACQuire Examples SEQ1 DEF ACQ SEQ2 DEF TRAN Query Syntax TRIGger SEQuencel DEFine TRIGger SEQuence2 DEFine Returned Parameters lt CRD gt Related Commands TRIG SEQ2 ACQ TRIG SEQ1 TRAN Common Commands CLS This command causes the following actions see chapter 7 for the descriptions of all registers Clears the Standard Event Status Operation Status Event and Questionable Status Event registers Clears the Status Byte and the Error Queue If CLS immediately follows a program message terminator lt NL gt then the output queue and the MAYV bit are also cleared Command Syntax CLS Parameters None ESE This command programs the Standard Event Status Enable register bits The programming determines which events of the Standard Event Status Event register see ESR are allowed to set the ESB Event Summary Bit of the Status Byte register A 1 in the bit position enables the corresponding event All of the enabled events of the Standard Event Status Event Register are logically ORed to cause the Event Summary Bit ESB of the Status Byte Register to be set The query reads the Standard Event The query reads the Standard Event Status Enable register Table 8 6 Bit Configuration of Standard Event Status Enable Register Buroo 7 e s 3 2 ae Ss Pado eee ne dee sl pitweign 12s e 2 w s 2 1 PON Power on
21. This mode provides the fastest output response but requires an external capacitor for stable operation To program the compensation mode from the front panel press the Output key use A to scroll to the COMP command press to select one of the four compensation mode settings and then press Enter To have the unit turn on with a different output compensation setting save this state in location 0 and set the power on state to RCL 0 The following table summarizes the four programmable compensation modes Mode Description LLocal Used for slower response with short load leads or bench operation This produces the slowest output response but provides the best stability no external capacitor needed LRemote Used for slower response with long load leads using remote sensing HLocal Use for faster response with short load leads or bench operation no external cap needed HRemote Used for faster response with long load leads using remote sensing This produces the fastest output response but requires an external capacitor for stable operation Corresponds to Low mode on earlier models 66311B D 66309B D Corresponds to High mode on earlier models 66311B D 66309B D If you do not know the input capacitance of the phone that you are testing leave the input capacitance set to LLocal mode initially This is because in LLocal mode the output of the dc source will be stable when testing cellular phones that have virtually any input c
22. amp numReadings voltArray 0 for i 0 i lt numReadings i printf Array Data d f V n i voltArray i reset sweep parameters for faster measurement viPrintf instrumentHandle SENS SWE TINT 51lg POIN 1d OFFS POIN ld n 15 6E 6 sampling rate 2048 sweep size 0 pre trigger points Measure final dc voltage level at the output terminals viQueryf instrumentHandle MEAS VOLT n 1lf amp measvoltage printf Output Voltage f V n measvoltage close all opened sessions viClose instrumentHandle viClose defRM printf PROGRAM COMPLETED n printf Press Enter key to continue n getchar return VI_SUCCESS 170 Example Programs D When this program runs it returns the DC RMS MIN MAX HIGH and LOW data in 10 measurement data points in the following format Output Voltage 1 999860 Output Current 0 000043 Arm acquisition system Pre trigger delay Trigger acquisition Dynamic voltage measurements dc 5 002660 V rms 5 002660 V max 5 080140 V min 1 996970 V high 5 002310 V low 3 538550 V Array Data 0 2 000360 V Array Data 1 1 999680 V Array Data 2 1 998320 V Array Data 3 1 996970 V Array Data 4 3 214240 V Array Data 5 4 064840 V Array Data 6 4 538600 V Array Data 7 4 923570 V Array Data 8 4 941870
23. initialization 71 initiate commands 124 INIT CONT NAME 125 INIT CONT SEQ 125 INIT NAME 124 INIT SEQ 124 initiating measurement trigger system 81 initiating output trigger system 74 input connections 28 power 18 inspection 26 instrument commands 110 INST COUP OUTP STAT 110 internal 131 internal triggers 82 internally triggered measurements 80 Index ea pee language dictionary 91 language setting 20 latching 113 lead resistance 29 line fuse 173 replacing 44 line voltage 28 line voltage conversion 173 live 113 LLocal 34 111 load line 21 load voltage drops 29 local sensing 33 location 27 low current readback 149 Low measurements 78 LRemote 34 111 M making measurements 56 57 58 75 76 79 manuals 26 MAV bit 88 maximum measurements 78 measure commands 75 76 79 100 MEAS ARR CURR 101 MEAS ARR VOLT 101 MEAS CURR ACDC 102 MEAS CURR HIGH 103 MEAS CURR LOW 103 MEAS CURR MAX 103 MEAS CURR MIN 104 MEAS CURR 102 MEAS CURR2 102 MEAS DVM ACDC 104 MEAS DVM 104 MEAS VOLT ACDC 105 MEAS VOLT HIGH 105 MEAS VOLT LOW 106 MEAS VOLT MAX 106 MEAS VOLT MIN 106 MEAS VOLT 104 MEAS VOLT2 105 measurement bandwidth 49 measurement buffer 49 measurement interval 49 measurement ranges 56 57 58 measurement samples 75 measurement trigger system model 80 measurements Hanning window 76 Rectangular window 76 message terminator 66 en
24. mask for enabling specific bits from the Operation Event register to set the operation summary bit OPER of the Status Byte register This bit bit 7 is the logical OR of all the Operatonal Event register bits that are enabled by the Status Operation Enable register Command Syntax STATus OPERation ENABle lt NRf gt Parameters 0 to 32767 Preset Value 0 Examples STAT OPER ENAB 1312 Query Syntax STATus OPERation ENABle Returned Parameters lt NR1 gt register value Related Commands STAT OPER EVEN STATus OPERation NTR STATus OPERation PTR These commands set or read the value of the Operation NTR Negative Transition and PTR Positive Transition registers These registers serve as polarity filters between the Operation Enable and Operation Event registers to cause the following actions When a bit in the Operation NTR register is set to 1 then a 1 to 0 transition of the corresponding bit in the Operation Condition register causes that bit in the Operation Event register to be set When a bit of the Operation PTR register is set to 1 then a 0 to 1 transition of the corresponding bit in the Operation Condition register causes that bit in the Operation Event register to be set Ifthe same bits in both NTR and PTR registers are set to 1 then any transition of that bit at the Operation Condition register sets the corresponding bit in the Operation Event register Ifthe same bits in both NTR and PTR registers are se
25. state Using Device Clear You can send a device clear at any time abort a SCPI command that may be hanging up the GPIB interface The status registers the error queue and all configuration states are left unchanged when a device clear message is received Device clear performs the following actions The input and output buffers of the dc source are cleared The dc source is prepared to accept a new command string The following statement shows how to send a device clear over the GPIB interface using Agilent BASIC CLEAR 705 IEEE 488 Device Clear The following statement shows how to send a device clear over the GPIB interface using the GPIB command library for C or QuickBASIC IOCLEAR 705 68 Introduction to Programming 6 SCPI Conformance Information SCPI Conformed Commands The Agilent 66321B D and 66319B D conform to SCPI Version 1995 0 ABOR CAL DATA CAL STAT DISP WIND STAT DISP WIND TEXT DATA INIT IMM SEQ NAME INIT CONT SEQ NAME MEAS FETC ARR CURR DC MEAS FETC ARR VOLT DC MEAS FETC SCAL CURR DC MEAS FETC SCAL CURR HIGH MEAS FETC SCAL CURR LOW MEAS FETC SCAL CURR MAX MEAS FETC SCAL CURR MIN MEAS FETC SCAL VOLT DC MEAS FETC SCAL VOLT HIGH MEAS FETC SCAL VOLT LOW MEAS FETC SCAL VOLT MAX MEAS FETC SCAL VOLT MIN OUTP STAT OUTP PROT CLE Non SCPI Commands CAL CURR SOUR DC POS CAL CURR SOUR
26. string segment When accessed DVM measurement functions are automatically active Refer to example 3 for more information Independently Control Output 1 and Output 2 on Agilent 66319B D units Action Display On the Function keypad press Output Scroll to the COUPLING command To COUPLING NONE uncouple the outputs use the 4X numeric key to select NONE then press Enter 2 Setting the Output Voltage Current Resistance Compensation and Relay Mode This example shows you how to set the output voltage current and resistance It also shows you how to set the compensation circuit for either high or low capacitance cellular phones Relay mode only applies to units that have Option 521 installed Note that no front panel changes affect the output of the unit unless it has been enabled 52 Front Panel Operation 5 Set the output voltage Action Display 1 To enter an approximate value without using the voltage menu On the Entry keypad 7 003V 0 004A press or to select the 1 s digit in the voltage field Then rotate the front panel RPG knob to obtain 7 V If the unit is in CC mode you won t see the output voltage change until the voltage setting is low enough to cause the unit to go into CV mode 2 The easiest way to enter an accurate value On the Function keypad press Voltage VOLT 7 000 On the Entry keypad press Enter Number 7 Enter 3 To make minor changes to an existing value On the Function keypad press VO
27. structure with the root at the top The following figure shows a portion of a subsystem command tree from which you access the commands located along the various paths You can see the complete tree in Table 8 1 OUTPut STATe DFI STATe SOURce PON tSTATe PROTection TT CLEar DELay OPERation LEVEN CONDition Figure 6 1 Partial Command Tree Multiple Commands in a Message Multiple SCPI commands can be combined and sent as a single message with one message terminator There are two important considerations when sending several commands within a single message e Use a semicolon to separate commands within a message There is an implied header path that affects how commands are interpreted by the dc source The header path can be thought of as a string that gets inserted before each command within a message For the first command in a message the header path is a null string For each subsequent command the header path is defined as the characters that make up the headers of the previous command in the message up to and including the last colon separator An example of a message with two commands is OUTP STAT ON PROT DEL 2 which shows the use of the semicolon separating the two commands and also illustrates the header path concept Note that with the second command the leading header OUTP was omitted because after the OUTP STAT ON command the header path was became defined as
28. 11 1990 EN 55011 1991 Group 1 Class B IEC 801 2 1991 EN 50082 1 1992 4 kV CD 8kV AD IEC 801 3 1984 EN 50082 1 1992 3 V m TEC 801 4 1988 EN 50082 1 1992 0 5 kV Signal Lines 1 kV Power Lines Supplementary Information The product herewith complies with the requirements of the Low Voltage Directive 73 23 EEC 93 68 EEC and the EMC Directive 89 336 EEC and carries the CE marking accordingly New Jersey May 1 2000 Location Date Bruce Krueger Quality Manager European Contact Your local Agilent Technologies Sales and Service Office or Agilent Technologies GmbH Department TRE Herrenberger Strasse 130 D 71034 Boeblingen FAX 49 703 1 14 3143 DECLARATION OF CONFORMITY according to ISO IEC Guide 22 and EN 45014 Manufacturer s Name Agilent Technologies Inc Manufacturer s Address 140 Green Pond Road Rockaway New Jersey 07866 U S A declares that the Product Product Name a Mobile Communication DC Source Dual Output Model Number a Agilent 66319B 66319D conforms to the following Product Specifications Safety IEC 1010 1 1990 A1 1992 EN61010 1 1993 EMC CISPR 11 1990 EN 55011 1991 Group 1 Class B IEC 801 2 1991 EN 50082 1 1992 4 kV CD 8kV AD IEC 801 3 1984 EN 50082 1 1992 3 V m TEC 801 4 1988 EN 50082 1 1992 0 5 kV Signal Lines 1 kV Power Lines Supplementary Information The product herewith complies with the requirements of the Low Voltage Directive 73 23 EEC 93 68 EEC and
29. 20 ppm equivalent 15 A 0 1 ohm 0 04 TC 5ppm C Guildline 9230 15 Load Resistor 400Q verification p n 0811 0942 3 W min TC 20ppm C 800Q calibration p n 0811 0600 Electronic Load 20 V 5 A minimum with transient capability and a Agilent N3300A mainframe a slew rate of 833kA s or better with N3303A module 143 B Performance Calibration and Configuration DC Power Supply 8V SA for current sink verification calibration Agilent 6611C 6631B 25 V source for DVM verification calibration 6631C or 6633B GPIB Controller Full GPIB capabilities only required if you are HP Series 200 300 or calibrating the unit over the GPIB equivalent Oscilloscope Sensitivity 1 mV Agilent 54504A or Bandwidth Limit 20 MHz equivalent Probe 1 1 with RF tip RMS Voltmeter True RMS Agilent 3400B or Bandwidth 20 MHz equivalent Sensitivity 100 uV Variable Voltage Transformer Adjustable to highest rated input voltage range Power 500 VA RC network required for stable Capacitor fixed film 25 uF 50V Kit p n 6950L T03 operation in H remote mode Resistor 0 25Q 1W Measurement Techniques Test Setup Figure B 1 shows the setup for the tests Use load leads of sufficient wire gauge to carry the full output current see chapter 3 NOTE Connector NOTE Connector is removable Al is removable DVM scope or P rms Voltmeter oZ gt DC Load for CC tests lt
30. CONTinuous SEQuencel OFF returns the system to single trigger mode 74 Programming the DC Source 7 Making Basic Measurements All dc sources have excellent output voltage and current measurement capability NOTE There is only one measurement system in the dc source Therefore you can perform only one measurement function voltage current or DVM at a time All measurements are performed by digitizing the instantaneous output voltage or current for a defined number of samples and sample interval storing the results in a buffer and then calculating the measured result For the main output output 1 many parameters of the measurement are programmable These include the number of samples the time interval between samples and the method of triggering Note that there is a tradeoff between these parameters and the speed accuracy and stability of the measurement in the presence of noise Average Measurements To measure the average output voltage or current for the main output output 1 use MEAS VOLT MEAS CURR Average voltage and current is measured by acquiring a number of readings at the selected time interval applying the Hanning window function to the readings and averaging the readings Windowing is a signal conditioning process that reduces the error in average measurements made in the presence of periodic signals such as pulse current waveforms which are generated when TDMA cellular phones are transmitting
31. DC NEG CAL MEAS DC LOWR CAL MEAS AC CAL LEV CAL PASS CAL SAVE CAL VOLT DC CAL VOLT PROT DISP WIND MODE MEAS FETC SCAL CURR ACDC MEAS FETC SCAL VOLT ACDC OUTP DFI STAT OUTP PROT DEL STAT QUES ENAB OUT PROT STAT STAT QUES NTR SOUR CURR LEV IMM AMPL STAT QUES PTR SOUR CURR LEV TRIG AMPL SYST ERR SOUR CURR PROT STAT SYST LANG SOUR VOLT LEV IMM AMPL SYST VERS SOUR VOLT LEV TRIG AMPL SOUR VOLT PROT SENS CURR DC RANG UPP TRIG SEQ TRAN IMM TRIG SEQ1 TRAN SOUR TRIG SEQ2 ACQ IMM SENS FUNC TRIG SEQ2 ACQ SOUR SENS SWE OFFS POIN TRIG SEQ DEF SENS SWE POIN CLS SENS SWE TINT ESE ESE ESR STAT OPER EVEN IDN STAT OPER COND OPC OPC OPT STAT OPER ENAB PSC PSC STAT OPER NTR RCL RST STAT OPER PTR SAV SRE STB STAT PRES TRG TST STAT QUES EVEN WAI STAT QUES COND OUTP DFLSOUR OUTP PON STAT OUTP RI MODE OUTP TYPE SENS CURR DET SENS LEAD STAT SOUR DIG DATA VAL SOUR DIG FUNC SOUR RES LEV IMM AMPL TRIG SEQ2 ACQ COUN CURR VOLT TRIG SEQ2 ACQ HYST CURR VOLT TRIG SEQ2 ACQ LEV CURR VOLT TRIG SEQ2 ACQ SLOP CURR VOLT 69 Programming the DC Source Introduction This chapter contains examples on how to program your dc source Simple examples show you how to program output functions such as voltage current and resistance internal and external triggers measurement functions th
32. DEFine AC Quire General Information Document Orientation This manual describes the operation of the Agilent Model 66321B D Mobile Communications and the Agilent Model 66319B D Dual Output DC Source Agilent Models 66321D and 66319D have an additional DVM measurement input on the rear panel Unless otherwise noted all models will be referred to by the description dc source throughout this manual The following Getting Started Map will help you find the information you need to complete the specific task that you want to accomplish Refer to the table of contents or index of each guide for a complete list of the information contained within Getting Started Map Where to find information Quick Reference Section Chapter 1 General information Chapter 2 Model differences Capabilities and characteristics Installing the unit Chapter 3 Line connections Computer connections Load connections Checking out the unit Chapter 4 Verifying proper operation Using the front panel Calibrating the unit Using the front panel Chapter 5 Front panel keys Front panel examples GPIB interface Programming the unit using SCPI commands Chapters 7 and 8 SCPI commands SCPI programming examples SCPI language dictionary Installing the VXIplug amp play instrument driver Chapter 6 NOTE The driver must be installed on your pc to access the on line information Drivers are available on the web at www agilent com find drivers 17 2 General
33. DFI SOURce OUTPut DFI STATe lt bool gt 0111OFFION OFF OUTP DFI 1 OUTP DFI OUTPut DFI STATe OIl OUTP DFI SOUR ON This command selects the source for discrete fault indicator DFI events The choices are QUEStionable OPERation ESB RQS OFF Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands OUTPut PON STATe selects the Questionable event summary bit bit 3 of the Status Byte Register selects the Operation Event summary bit bit 7 of the Status Byte Register selects the Standard Event summary bit bit 5 of the Status Byte Register selects the Request Service bit bit 6 of the Status Byte Register selects no DFI source OUTP DFI SOUR lt source gt QUES OPER ESB RQS OFF OFF OUTP DFI SOUR OPER OUTPut DFI SOUR lt CRD gt OUTP DFI This command selects the power on state of the dc source This information is saved in non volatile memory The following states can be selected RST RCLO Command Syntax Parameters Examples Query Syntax Returned Parameters Related Commands 112 Sets the power on state to RST Refer to RST for more information Sets the power on state to RCL 0 Refer to RCL for more information OUTPut PON STATe lt state gt RST RCLO OUTP PON STAT RST OUTPut PON STATe lt CRD gt RST RCL Language Dictionary 8 OUTPut PROTection CLEar This command clears the latch that disables the outp
34. Measurements To return the maximum or minimum value of a pulse or ac waveform use FETC VOLT MAX or FETC VOLT MIN FETC CURR MAX or FETC CURR MIN High Low Measurements The value of the high level or low level of a pulse can also be measured High and low level measurements are defined as follows The instrument first measures the minimum and maximum data points of the pulse waveform It then generates a histogram of the pulse waveform using 16 bins between the maximum and minimum data points The bin containing the most data points above the 50 point is the high bin The bin containing the most data points below the 50 point is the low bin The average of all the data points in the high bin is returned as the High level The average of all the data points in the low bin is returned as the Low level If no high or low bin contains more than 1 25 of the total number of acquired points then the maximum or minimum value is returned by these queries To return the average value of the high bin use ETC CURR HIGH or ETC VOLT HIGH ETC CURR LOW or ETC VOLT LOW F F To return the average value of the low bin use F F 78 Programming the DC Source 7 Returning All Measurement Data From the Data Buffer The MEASure ARRay and FETCh ARRay queries return all data values of the instantaneous voltage or current buffer No weighting function is applied returning only raw data from the buffer The c
35. PRINT Cu 360 370 OUTPUT Ps F measurement 380 ENTER Ps Cur 390 PRINT MAX CU 400 410 OUTPUT Ps F 420 ENTER Ps Cur 430 PRINT MIN CU 440 450 OUTPUT Ps F 460 ENTER Ps Cur 470 PRINT HIGH C 480 490 OUTPUT Ps F 500 ENT ER 510 PRINT LOW CU 520 530 END EN S SWE OFFS POIN 20 UT Ps INIT NA ET ET r RR ET r ET r UR ET RR RRI E ACQ CH ARRAY CURR ER Ps Curr_array rr_array CH CURR MAX max ENT Curr_max CH CURR MIN min ENT Curr_min CH hi RENT Curr_hi CURR HIGH CH CURR LOW Ps Curr_low ENT Curr_low Number of sample points before Initiate the trigger system Controller now waits for trigger Ge En Print all data points Get more data from previous ters all 100 data points t the data after measurement When this program runs it returns 100 measurement data points as well as the MIN MAX HIGH and LOW data in the following format 2030585 031869 0320825 031449 0327249 031013 3 13817 3 13624 0331529 0350788 031869 0329389 0320829 0325109 0320829 030371 031441 0337949 031441 0337949 0322969 031655 3 13453 3 13731 0329389 0333669 MAX CURRENT MIN CURRENT HIGH CURRENT LOW CURRENT 168 1 3 3 0344369 031655 g 03 1227 031441 0325109 0333669 3 977283 066749
36. Step 4 When you service the request read the event registers to determine which Operation Status and Questionable Status Event register bits are set and clear the registers for the next event Use STAT OPER EVEN QUES EVEN Monitoring Both Phases of a Status Transition You can monitor a status signal for both its positive and negative transitions For example to generate RQS when the dc source either enters the CC constant current condition or leaves that condition program the Operational Status PTR NTR filter as follows STAT OPER PTR 1024 NTR 1024 STAT OPER ENAB 1024 SRE 128 The PTR filter will cause the OPERational summary bit to set RQS when CC occurs When the controller subsequently reads the event register with STATus OPERational EVENt the register is cleared When CC subsequently goes false the NTR filter causes the OPERational summary bit to again set RQS Inhibit Fault Indicator The remote inhibit INH and discrete fault FLT indicators are implemented through the respective INH and FLT connections on the rear panel Refer to Table A 2 for the electrical parameters Refer to Appendix E for a programming example Remote Inhibit Rl Remote inhibit is an external chassis referenced logic signal routed through the rear panel INH connection which allows an external device to disable the dc source output To select an operating modes for the remote inhibit signal use
37. V Array Data 9 5 025240 V Output Voltage 5 002450 V PROGRAM COMPLETED Press Enter key to continue 171 E Line Voltage Conversion WARNING Shock Hazard Operating personnel must not remove instrument covers Component replacement and internal adjustments must be made only by qualified service personnel Open the Unit Turn off ac power and disconnect the power cord from the unit Use a l15 Torx drive and remove the two screws on the bottom of the unit If your unit has feet you will need to remove one of the feet to access the screw Usea 15 Torx drive and loosen the two screws on the rear bezel and remove the bezel Slide the cover toward the back of the unit and remove it Configure the Power Transformer Locate the ac input wiring harness on the left side of the transformer Use a needle nose pliers and connect the ac input wiring harness according to the information in figure E 1 on the following page Install the Correct Line Fuse Install the correct line fuse The fuse is located on the bottom pc board directly behind the ac line switch and is labeled F301 For 100 120 Vac operation 3 15 AT time delay part number 2110 0638 For 220 230 Vac operation 1 6 AT time delay part number 2110 0773 Mark the voltage setting that the unit has been set to on the rear panel label Close the Unit Slide the cover over the unit toward the front Place the bezel on the rear of the unit and tighten
38. VOLT POS n viPrintf instrumentHandle TRIG ACQ COUN VOLT ld n 1 viPrintf instrumentHandle TRIG ACQ SOUR INT n initiate the acquisition system for measurement trigger printf Arm acquisition system n viPrintf instrumentHandle INIT NAME ACQ n must allow time for pre triggered samples printf Pre trigger delay n trigger the acquisition by changing the output voltage level to 5V printf Trigger acquisition n viPrintf instrumentHandle VOLT 5lg n 5 0 fetch dynamic measurements from the same measurement data viQueryf instrumentHandle FETC VOLT n Slf amp resultDC viQueryf instrumentHandle FETC VOLT ACDC n 1f amp resultRMS viQueryf instrumentHandle FETC VOLT MAX n 1f amp resultMAX viQueryf instrumentHandle FETC VOLT MIN n 1f amp resultMIN viQueryf instrumentHandle FETC VOLT HIGH n 1f amp resultHIGH viQueryf instrumentHandle FETC VOLT LOW n 1f amp resultLOW display measurement results printf Dynamic voltage measurements n printf de sf V n rms f V n max Sf V n min f V n high sf V n low f V n resultDC resultRMS resultMAX resultMIN resultHIGH resultLOW fetch first 10 data points from the measurement numReadings 10 viQueryf instrumentHandle FETC ARR VOLT n 1l t
39. Voltage and Current Agilent 66319B 66319D only The measurement parameters for output 2 are not programmable They are fixed at 2048 data points with a 15 6 microsecond sampling rate using a Hanning window To measure the average output voltage or current for output 2 use MEAS VOLT2 MEAS CURR2 Making Enhanced Measurements Agilent Models 66321B D and 66319B D have the ability to make several types of voltage or current waveform measurements These expanded measurement capabilities are particularly useful for loads that draw current in pulses The SCPI language MEASure and FETCh queries are used to return the various measurement parameters of voltage and current waveforms 76 Programming the DC Source 7 There are two ways to make enhanced measurements Use the MEASure queries to immediately start acquiring new voltage or current data and return measurement calculations from this data as soon as the buffer is full This is the easiest way to make measurements since it requires no explicit trigger programming Additional calculations may be obtained from the acquired data using FETCh queries Use a triggered measurement when the measurement must be synchronized to a signal condition as discussed under Triggering Measurements Then use the FETCh queries to return calculations from the data that was retrieved by the acquisition trigger This method gives you the flexibility to synchronize the data acquisition with a
40. all events that are passed by the Operation NTR and or PTR filter Reading the Operation Event register clears it Query Syntax STATus OPERtion EVENt Parameters None Returned Parameters lt NR1 gt Register Value Examples STAT OPER Related Commands CLS STAT OPER NTR STAT OPER PTR Table 8 4 Bit Sa ee of a a Status is Registers e 5_f 41 o Bit Name not CC2 CC CC WTG used ae ses Bit Weight 4096 2048 1024 512 256 32 CAL The de source is computing new calibration constants WTG The dc source is waiting for a trigger CV The dc source is operating in constant voltage mode CV2 Output 2 is operating in constant voltage mode Agilent 66319B D only CC The dc source is operating in constant current mode CC The dc source is operating in negative constant current mode CC2 Output 2 is operating in constant current mode Agilent 66319B D only STATus OPERation CONDition This query returns the value of the Operation Condition register That is a read only register which holds the real time unlatched operational status of the dc source Query Syntax STATus OPERation CONDition Parameters None Examples STAT OPER COND STATUS OPERATION CONDITION Returned Parameters lt NR1 gt register value 119 8 Language Dictionary STATus OPERation ENABle This command and its query set and read the value of the Operational Enable register This register is a
41. been programmed the trigger subsystem is immediately re enabled for subsequent triggers As soon as it is cleared the WTG bit is again set to 1 Command Syntax TRIGger SEQuence1 MMediate TRIGger TRANsient IMMediate Parameters None Examples TRIG TRIG IMM Related Commands ABOR CURR TRIG INIT TRG VOLT TRIG TRIGger SOURce This command selects the trigger source for the output transient trigger system Since BUS is the only trigger source for transient triggers this command does not need to be used It is included for completeness only BUS GPIB device TRG or lt GET gt Group Execute Trigger Command Syntax TRIGger SEQuence1 SOURce lt source gt TRIGger TRANsient SOURce lt source gt Parameters BUS RST Value BUS Examples TRIG SOUR BUS Query Syntax TRIGger SEQuence1 SOURce TRIGger TRANsient SOURce Returned Parameters lt CRD gt 125 8 Language Dictionary TRIGger SEQuence2 TRIGger ACQuire These commands generate a BUS trigger for the measurement trigger system When the measurement trigger system is enabled the measurement trigger causes the dc source to measure either the voltage or current on the main output or the DVM inputs and store the results in a buffer The SENSe FUNCtion command selects the signal that will be measured Command Syntax TRIGger SEQuence2 MMediate TRIGger AC Quire IMMediate Parameters None Examples TRIG SEQ2 TRIG ACQ Related Commands TRIG
42. check for open sense leads when the output is turned on or enabled With Hot output switching the output is programmed before the sense relays are closed Command Syntax OUTPut 1I2 RELay MODE lt mode gt Parameters DD DH HD1 HH Examples OUTP REL MODE DH sets output 1 relay mode DH OUTP2 REL MODE HH sets output 2 relay mode HH Query Syntax OUTPut 1I2 REL MODE Returned Parameters lt CRD gt CAUTION Non volatile memory has a finite maximum number of write cycles Programs that repeatedly cause write cycles to non volatile memory can eventually exceed the maximum number of write cycles and cause the memory to fail OUTPut COMPensation MODE This command programs the output compensation circuit This circuit compensates the output of the dc source according to the input capacitance of the phone being tested as well as the type of output connections being used The following table summarizes the four programmable compensation modes Mode Description LLocal Used for slower response with short load leads or bench operation This produces the slowest output response but provides the best stability no external capacitor needed LRemote Used for slower response with long load leads using remote sensing HLocal Use for faster response with short load leads or bench operation no external cap needed HRemote Used for faster response with long load leads using remote sensing This produces the fastest output response but
43. configuration parameters are changed they are not immediately stored into non volatile memory To store the change into non volatile memory the CFG SAVE command must be executed Note that the unit is put into the present RST state upon entering and exiting the configuration function 162 Error Messages Error Number List This appendix gives the error numbers and descriptions that are returned by the dc source Error numbers are returned in two ways Error numbers are displayed on the front panel Error numbers and messages are read back with the SYSTem ERRor query SYSTem ERRor returns the error number into a variable and returns two parameters an NR1 and a string The following table lists the errors that are associated with SCPI syntax errors and interface problems It also lists the device dependent errors Information inside the brackets is not part of the standard error message but is included for clarification When errors occur the Standard Event Status register records them in bit 2 3 4 or 5 as described in the following table Table C 1 Error Numbers Error Error String Description Explanation Examples Number Command Errors 100 through 199 sets Standard Event Status Register bit 5 Command error generic Invalid character Syntax error unrecognized command or data type Invalid separator Data type error e g numeric or string expected got block data GET not allowed Parameter not all
44. faster than the dc source Current Monitoring Resistor The 4 terminal current shunt is used to eliminate output current measurement error caused by voltage drops in the load leads and connections It has special current monitoring terminals inside the load connection terminals Connect the voltmeter directly to these current monitoring terminals Performance Tests NOTE Performance tests verify that the dc source complies with the specifications listed in Table A 1 Performance tests are indicated by the word performance after the test Calibration verification tests are used to verify that the unit is within calibration and are indicated by the word calibration after the test All of the performance test specifications are entered in the appropriate Performance Test Record Card for your specific model You can record the actual measured values in the column provided in this card Programming You can program the de source from the front panel keyboard or from an GPIB controller when performing the tests The test procedures are written assuming that you know how to program the dc source either remotely from an GPIB controller or locally using the control keys and indicators on the front panel Also when performing the verification tests from an GPIB controller you may have to consider the relatively slow settling times and slew rates of the dc source as compared to computer and system voltmeters Suitable WAIT statements can be inserte
45. has occurred DDE Device dependent error CME Command error QUE Query error EXE Execution error OPC Operation complete 132 Language Dictionary 8 Command Syntax ESE lt NRf gt Parameters 0 to 255 Power On Value See PSC Examples ESE 129 Query Syntax ESE Returned Parameters lt NR1 gt Register value Related Commands ESR PSC STB CAUTION _ If PSC is programmed to 0 the ESE command causes a write cycle to nonvolatile memory Nonvolatile memory has a finite maximum number of write cycles Programs that repeatedly cause write cycles to nonvolatile memory can eventually exceed the maximum number of write cycles and cause the memory to fail ESR This query reads the Standard Event Status Event register Reading the register clears it The bit configuration is the same as the Standard Event Status Enable register see ESE Query Syntax ESR Parameters None Returned Parameters lt NR1 gt Register binary value Related Commands CLS ESE ESE OPC IDN This query requests the dc source to identify itself It returns a string composed of four fields separated by commas Query Syntax IDN Returned Parameters lt AARD gt Field Information Agilent Technologies Manufacturer XXXXXA model number followed by a letter suffix 0 zero or the unit s serial number if available lt A gt XX XX Revision levels of firmware Example AGILENT TECHNOLOGIES 66321B 0 A 0
46. how this affects the DVM s measurement capability Use the Meter menu for making DVM measurements Action Display 1 On the Function keypad press Meter and press W repeatedly to access the following DVM measurement parameters e dc voltage lt reading gt V DC DVM e rms voltage ac dc rms lt reading gt V RMS DVM 58 Front Panel Operation 5 8 Programming Output Port Functions You can configure the output port to perform three different functions In RIDFI mode the port functions as a remote inhibit input with a discrete fault indicator output signal In DIGIO mode the port acts as a digital Input Output device In TRIGGER mode the port accepts external measurement trigger signals To configure the RIDFI mode of the port proceed as follows Action Display 1 On the Function keypad press Output RST 2 Scroll through the Output menu by pressing V The PORT command lets you select PORT RIDFI either the RIDFI DIGIO or TRIGGER function Press Enter when done 3 Scroll to the RI command to configure the Remote INHibit indicator Use the and RI LIVE Vv keys to select either LIVE or LATCHING either of which enable the RI indicator RI LATCHING Then press Enter With RI enabled a low true on the INH input will disable the output of the unit LIVE causes the output of the unit to track the state of the INH input LATCHING latches the output of the unit off in response to the inhibit signal 4 Access the Output menu aga
47. in the presence of periodic signals The DVM sampling rate and sweep size result in a data acquisition time of 32 milliseconds per measurement Adding a command processing overhead of about 20 milliseconds results in a total measurement time of about 50 milliseconds per measurement RMS Measurements To measure rms voltage use MEAS DVM ACDC This returns the total rms measurement If ac and dc are present the DVM measures the total rms of ac dc Making rms or average measurements on ac waveforms for which a non integral number of cycles of data has been acquired may result in measurement errors due to the last partial cycle of acquired data This error is reduced by using a Hanning window function when making the measurement 79 7 Programming the DC Source Triggered Measurements Use the measurement trigger system to synchronize the acquisition of measurements with either a BUS or internal trigger You can trigger voltage and current measurements on the main output output 1 and on the DVM An internal trigger synchronizes the acquisition to a signal condition Use FETCh commands to return different calculations from the data acquired by the measurement system Briefly to make a triggered measurement Select a sweep interval and sample size Set up the trigger levels Setting the output 2 voltage and current Select the trigger source Enable the trigger system Fetch the triggered measurements NNBWNeE SCPI Triggering N
48. indoor use in an installation category II pollution degree 2 environment It is designed to operate at a maximum relative humidity of 95 and at altitudes of up to 2000 meters Refer to the specifications tables for the ac mains voltage requirements and ambient operating temperature range BEFORE APPLYING POWER Verify that the product is set to match the available line voltage the correct fuse is installed and all safety precautions are taken Note the instrument s external markings described under Safety Symbols GROUND THE INSTRUMENT To minimize shock hazard the instrument chassis and cover must be connected to an electrical ground The instrument must be connected to the ac power mains through a grounded power cable with the ground wire firmly connected to an electrical ground safety ground at the power outlet Any interruption of the protective grounding conductor or disconnection of the protective earth terminal will cause a potential shock hazard that could result in personal injury ATTENTION Un circuit de terre continu est essentiel en vue du fonctionnement s curitaire de l appareil Ne jamais mettre l appareil en marche lorsque le conducteur de mise la terre est d branch FUSES Only fuses with the required rated current voltage and specified type normal blow time delay etc should be used Do not use repaired fuses or short circuited fuseholders To do so could cause a shock or fire hazard Vous devrez imp ra
49. inspect it for any obvious damage that may have occurred during shipment If there is damage notify the shipping carrier and the nearest Agilent Sales and Support Office immediately The list of Agilent Sales and Support Offices is at the back of this guide Warranty information is printed in the front of this guide Packaging Material Until you have checked out the dc source save the shipping carton and packing materials in case the unit has to be returned If you return the dc source for service attach a tag identifying the owner s name and address the model number and a brief description of the problem Items Supplied The following user replaceable items are included with your dc source Some of these items are installed in the unit Table 3 1 Items Supplied Part Number Description Power Cord contact the nearest Agilent A power cord appropriate for your location Sales and Support Office Digital I O 1252 1488 4 terminal digital plug for connecting digital I O leads connector The connector installs in the back of the unit Output 0360 2604 5 terminal output plug for connecting load and sense connector leads This connector installs in the back of the unit DV 1252 8670 3 terminal plug for DVM connections 66319B D connector sensing Connect s to and s to 2110 0773 1 6 AT time delay for 220 230 Vac operation User s Guide 5964 8125 This manual Contains installation checkout front panel and programming i
50. leads other than at the test fixture The open sense detect circuit will check for continuity in the sense leads when the output turned on from disabled to enabled Figure 3 3 shows how to connect remote sense leads and load leads when external disconnect relays are included in the load path NOTE In this arrangement the output of the unit should be programmed OFF before the relays are switched This is because if the load leads are opened before the sense leads the overvoltage protection circuit will trip if it is enabled OUTPUT 1 OUTPUT 2 CONNECTOR ayy TWIST PAIR lt WIRE RESISTANCE DISCONNECT RELAYS Figure 3 3 Remote Sense Connections with External Relays 30 Installation 3 Figure 3 4 shows how to connect remote sense leads when using a removable test fixture Note that in this configuration the wires in the part of the test fixture where the phone is located must be less than 50 cm 20 inches in length This is for stability as well as for the fact that the remote sense leads cannot compensate for the voltage drop in this part of the test fixture Programming a negative output resistance lets you compensate for the unsensed voltage drop in the load leads between the remote sense points and the phone terminals First you must measure or calculate the resistance of the wires between the test fixture and the phone terminals see table 3 2 Then you can program the equivalent negative o
51. listing visit our web site http www agilent com find tmdir You can also contact one of the following centers and ask for a test and measurement sales representative United States Agilent Technologies Test and Measurement Call Center P O Box 4026 Englewood CO 80155 4026 tel 1 800 452 4844 Canada Agilent Technologies Canada Inc 5150 Spectrum Way Mississauga Ontario L4W 5G1 tel 1 877 894 4414 Europe Agilent Technologies Test amp Measurement European Marketing Organisation P O Box 999 1180 AZ Amstelveen The Netherlands tel 31 20 547 9999 Japan Agilent Technologies Japan Ltd Measurement Assistance Center 9 1 Takakura Cho Hachioji Shi Tokyo 192 8510 Japan tel 81 426 56 7832 fax 81 426 56 7840 Technical data is subject to change Latin America Agilent Technologies Latin American Region Headquarters 5200 Blue Lagoon Drive Suite 950 Miami Florida 33126 U S A tel 305 267 4245 fax 305 267 4286 Australia New Zealand Agilent Technologies Australia Pty Ltd 347 Burwood Highway Forest Hill Victoria 3131 tel 1 800 629 485 Australia fax 61 3 9272 0749 tel 0 800 738 378 New Zealand fax 64 4 802 6881 Asia Pacific Agilent Technologies 24 F Cityplaza One 1111 King s Road Taikoo Shing Hong Kong tel 852 3197 7777 fax 852 2506 9284 Manual Updates The following updates have been made to this manual since its publication
52. mA Resistance 1 2 mQ NA Tracking OVP Accuracy Above programmed 2 0V 2 NA refer to page 35 for details voltage Average Current Measurement 3 A Range Resolution 1 A Range 0 02A Range Maximum Current Measurement 3 A Range 1 A Range 0 02A Range NA Sink Current 2 7S VI 0 03 A 7 5 V Programming Accuracy Voltage 0 01 0 5 mV 0 03 1 5 mV Temperature Coefficient Current 0 01 15 uA 0 03 0 4 mA change C Resistance 0 1 0 2 mQ NA Readback Accuracy Temperature Voltage 0 01 300 uV 0 02 1 5 mV Coefficient change C 3 A Current dc 0 02 15 uA 0 02 0 4 mA 3 A Current acdc 0 05 120 LA NA 1 A Current range 0 01 10 pA A 0 02A Current range 0 01 0 3 uA Drift Voltage 0 01 1 mV 0 03 3 mV Current n aaa E aia 0 8 mA Remote Sense Capability In each load lead up to 4 upto4 y si up to 4 luptoavi Output Voltage Rise Time 10 to 90 lt 200 us lt 200 us Output Voltage Fall Time 90 to 10 lt 200 us lt 35 ms Output Voltage Settling Time 0 to rated voltage 0 5 ms rated an to 0 eo ms Output 2 OFF time si 2 OFF time 12Vt02V Vto2V lt 200 lt 20us6 The sink current decreases linearly from 2 8A 0 V to 1 2 A 15 V NA current does not track the programmed current Following a 30 minute warm up the change in output over 8 hours under constant ambient load and line conditions Add 2 mV to the load regulation for each 1 V change in the pos
53. mount option NOTE Support rails or an instrument shelf is required when rack mounting units Figure 3 1 Outline Diagram 27 3 Installation Input Connections Connect the Power Cord Connect the power cord to the IEC 320 connector on the rear of the unit If the wrong power cord was shipped with your unit contact your nearest Agilent Sales and Support Office to obtain the correct cord refer to the list at the back of this guide Check the line voltage rating label on the back of the unit to make sure that it agrees with your ac mains voltage Refer to appendix E if the voltage at your site is different from the voltage indicated on the unit Output Connections Turn the unit off before connecting any wires Output 1 The main output connector output 1 has a termination for the and output the and sense terminals and an earth ground terminal The 5 pin connector is removable and accepts wires sizes from AWG 22 to AWG 12 Disconnect the mating plug from the unit by pulling it straight back IMPORTANT You must connect the sense terminals on Output 1 for the unit to operate properly Refer to the section on Open Sense Lead Protection in this chapter Install the connector plug with its supplied sense jumpers before applying power to the unit Output 2 Agilent 66319B D units have a second output connector output 2 It has the same configuration as the main output connector It has a termination for the an
54. of the Service Request Enable register Servicing Operation Status and Questionable Status Events This example assumes you want a service request generated whenever the dc source switches to the CC constant current operating mode or whenever the dc source s overvoltage overcurrent or overtemperature circuits have tripped From figure 7 7 note the required path for a condition at bit 10 CC of the Operation Status register to set bit 6 RQS of the Status Byte register Also note the required path for Questionable Status conditions at bits 0 1 and 4 to generate a service request RQS at the Status Byte register The required register programming is as follows 88 Programming the DC Source 7 Step 1 Program the Operation Status PTR register to allow a positive transition at bit 10 to be latched into the Operation Status Event register and allow the latched event to be summed into the Operation summary bit Use STAT OPER PTR 1024 ENAB 1024 Step 2 Program the Questionable Status PTR register to allow a positive transition at bits 0 1 or 4 to be latched into the Questionable Status Event register and allow the latched event to be summed into the Questionable summary bit Use STAT QUES PTR 19 ENAB 19 1 2 16 19 Step 3 Program the Service Request Enable register to allow both the Operation and the Questionable summary bits from the Status Byte register to generate RQS Use SRE 136 8 128 136
55. or CC status is incorrect for this command Too many sweep points CURRent or VOLTage fetch incompatible with last acquisition Measurement overrange Remote front panel communication error 165 Example Programs Pulse Measurements The following programs illustrate how to make a pulse measurement over the GPIB The measurement function is set to ACDC which gives the best results for current waveforms that have ac content The measurement incorporates 100 readings taken at time intervals of 20 microseconds for a total measurement time of 2 milliseconds The trigger point for the pulse measurement occurs at 0 1 amperes on the positive slope of the current pulse The measurement offset is programmed so that 20 measurement points prior to the trigger are also returned as part of the measurement sample Because measurement triggers are initiated by the output pulse a FETCh command is used to return the measurement data FETCh commands are also used to return the MAXimum MINimum HIGH and LOW values of the measurement MEASure commands cannot be used to return data in this example because they always acquire NEW measurement data each time they are used To produce the output pulses in this example an electronic load must be connected and programmed to generate 3 ampere pulses with a duty cycle of 100 microseconds at 1000 Hz The dc source address is 705 and the load address is 706 If required change these parameters in the appropriate stat
56. output 2 current limit 54 Action Select output 2 as described in example 1 On the Entry keypad press or to select the tenths digit in the current field Rotate the front panel RPG knob to obtain 0 4A If the unit is in CV mode you will not see the output current change until the current setting is low enough to cause the unit to go into CC mode An alternate way to enter a value On the Function keypad press Current On the Entry keypad press Enter Number 4 Enter Display 2 7 003V 0 004A 2 VOLT 7 000 2 VOLT 8 000 Display 2 8 003V 0 400A 2 CURR 0 400 Front Panel Operation 5 3 To make minor changes to an existing value press Current The procedure to change an individual digit is explained in step 3 under Set the output 2 voltage NOTE To draw current pulses greater than 1 5 A and up to 2 5 A peak on output 2 set the output current limit higher than 1 5 amperes 1 52 amperes max Do not enable OCP or else make sure that the protection delay setting is longer than the expected current pulse Enable the output Action On the Function keypad press Output On Off to enable output 2 The Dis annunciator will go off indicating that the voltage is now applied to the output terminals The display indicates the actual output values Note that when the outputs are coupled this command also enables or disables output 1 4 Querying and Clearing Output Protection and Errors Display 2 8 003V 0 50
57. panel measurements from the main output output 1 are calculated from a total of 2048 readings taken at a 46 8 microsecond sampling rate Therefore the factory default acquisition time for a single front panel measurement is about 100 milliseconds Refer to Making Front Panel Measurements for more information about changing the front panel sampling rate and the number of measurement points All front panel measurements from the DVM and from output2 are fixed at 2048 measurement readings taken at a 15 6 microsecond sampling rate NOTE Notes The front panel sample rate and data point settings are separate and independent of the sample rate and data point settings that are programmed over the GPIB interface When an GPIB measurement is in progress the front panel display temporarily indicates Front panel measurements resume when the GPIB measurement completes Press this key to access the meter menu list Also use this key to exit a menu at any time and return to meter mode Display Measurement lt reading gt V lt reading gt A Measures output dc voltage and current lt reading gt V MAX Measures peak output voltage lt reading gt V MIN Measures minimum output voltage lt reading gt V HIGH Measures the high level of a voltage waveform lt reading gt V LOW Measures the low level of a voltage waveform lt reading gt V RMS Measures rms voltage lt reading gt A MAX Measures peak output current lt reading gt A MI
58. particular change applies only to certain instruments This document contains proprietary information protected by copyright All rights are reserved No part of this document may be photocopied reproduced or translated into another language without the prior consent of Agilent Technologies The information contained in this document is subject to change without notice Copyright 2000 Agilent Technologies Inc Edition 1 May 2000 Update 1 January 2001 Update 2__ May 2003 Table of Contents Warranty Information Safety Summary Declaration Page Acoustic Noise Information Printing History Table of Contents 1 QUICK REFERENCE The Front Panel At a Glance The Rear Panel At a Glance Instrument Configuration Front Panel Number Entry Front Panel Annunciators Immediate Action Keys Front Panel Menus At a Glance SCPI Programming Commands At a Glance 2 GENERAL INFORMATION Document Orientation Safety Considerations Options and Accessories Description and Model Differences Option 521 Description Agilent 66319B D only 3 INSTALLATION Installation and Operation Checklist Inspection Location Input Connections Output Connections DVM Connections External Protection and Trigger Input Connections Digital I O Connections Computer Connections 4 TURN ON CHECKOUT Checkout Procedure In Case of Trouble 5 FRONT PANEL OPERATION Introduction Front Panel Description System Keys Function Keys Entry Keys Examples o
59. pins 1 to 3 according to their binary weight Refer to the DIGital DATA command for more information 90 Language Dictionary Introduction This section gives the syntax and parameters for all the IEEE 488 2 SCPI commands and the Common commands used by the dc source It is assumed that you are familiar with the material in chapter 6 which explains the terms symbols and syntactical structures used here and gives an introduction to programming You should also be familiar with chapter 5 in order to understand how the dc source functions The programming examples are simple applications of SCPI commands Because the SCPI syntax remains the same for all programming languages the examples given for each command are generic Syntax Forms Syntax definitions use the long form but only short form headers or keywords appear in the examples Use the long form to help make your program self documenting Parameters Most commands require a parameter and all queries will return a parameter The range for a parameter may vary according to the model of dc source When this is the case refer to the Specifications table in the Appendix A Related Where appropriate related commands or queries are included These are listed Commands because they are either directly related by function or because reading about them will clarify or enhance your understanding of the original command or query Order of The dictionary is organized according to the
60. press Enter to select the first CAL LEV P1 calibration point 54 Press Shift Cal scroll to CAL DATA press Enter Number and enter CAL DATA 0 00 the voltage value displayed on the external DMM Numbers entered from the external DMM should have an accuracy and resolution of 0 1 mV or better Press Enter 55 Reverse the output 1 connections Move the lead to the DVM connector pin and move the lead to the DVM connector pin 56 Press Shift Cal scroll to CAL LEV use to scroll to P2 the second CAL LEV P2 calibration point and press Enter 57 Press Shift Cal scroll to CAL DATA press Enter Number and enter CAL DATA 0 00 the second voltage value displayed on the external DMM Numbers entered from the external DMM should have an accuracy and resolution of 0 1 mV or better Because this second value is negative you must place a minus sign in front of the value Pressing the Enter Number key the second time enters the minus sign Then press Enter Saving the Calibration Constants WARNING Storing calibration constants overwrites the existing ones in non volatile memory If you are not sure you want to permanently store the new constants omit this step The dc source calibration will then remain unchanged Action Display 58 Press Shift Cal scroll to CAL SAVE and press Enter CAL SAVE 59 Press Shift Cal select CAL OFF and press Enter to exit Calibration mode CAL OFF RST and RCL will also set the calibration stat
61. protected state with the output disabled Keep load leads as short as possible Load leads cannot exceed 18 inches per side when local sensing Bundle or twist the leads tightly together to minimize inductance Jumper the output 1 pin to its sense pin and the output 1 pin to its sense pin OUTPUT 1 OUTPUT 2 CONNECTOR TAS JUMPER _ TWIST LEADS Pai Pa aa EACH LEAD MUST BE LESS THAN 20 INCHES IN LENGTH R WIRE RESISTANCE Figure 3 5 Local Sensing Output Compensation High bandwidth performance and stability are achieved by using a software switchable output compensation circuit This compensation circuit has four bandwidth positions to optimize the response for different ranges of phone capacitance The compensation function is set using either the front panel COMP command located in the Output menu see chapter 5 or the OUTput COMPensation MODE command as explained in chapter 8 The circuit covers the following approximate capacitance ranges LLocal mode 0 to 12 000 uF LRemote mode 2 uF to 12 000 uF HLocal mode 0 to 12 000 uF HRemote mode 5 uF to 12 000 uF gt o 33 3 Installation Refer to the previous discussion under Remote Sense Connections and Local Sensing for more information about remote and local sensing Standard dc source units are shipped from the factory with the output compensation set to HRemote mode
62. protection status Display OVER CURRENT NO FAULT Command Function Status of the protection features example shows overcurrent Status of the protection features example shows none tripped Press this key to access the overvoltage protection menu Display PROT STAT lt char gt Command Function Enables or disables overvoltage protection ON OFF This key accesses the calibration menu Refer to Appendix B for details These parameters are explained in chapter 3 These status summary bits are explained in chapter 7 These relay modes are explained in chapter 2 value a numeric value char a character string parameter Use and Use and Use and to scroll through the menu commands to scroll through the menu parameters to select a digit in a numeric entry field Front Panel Operation 5 Entry Keys Refer to the examples later in this chapter for more details on the use of these keys ENTRY Cir Entry P Enter Number S Ai Ez e Backspace Figure 5 4 Entry Keys a These keys let you scroll through choices in a parameter list that apply to a specific command Parameter lists are circular you can return to the starting position by continuously pressing either key If the command has a numeric range these keys increment or decrement the existing value In meter mode these keys can be used to adjust the magnitude of the output voltage or current Onl
63. range that gives the best resolution The range crossover values are 20 mA and 1A respectively When queried the returned value is the maximum dc current that can be measured on the range that is presently set Command Syntax SENSe CURRent DC RANGe UPPer lt NRf gt Parameters 0 through MAX see table A 2 Unit A amperes RST Value 3A high range Examples SENS CURR RANG 4 0 Query Syntax SENSe CURRent RANGe Returned Parameters lt NR3 gt 107 8 Language Dictionary SENSe LEAD STATus This query returns the status of the open sense detection circuit The query must be performed with the output disabled Any external source such as an external capacitor must be discharged The following status code is returned Value Description Value Description 0 Sense lead connections are normal 4 Sense lead status is unknown possibly 1 Positive sense lead is open caused by an external voltage 2 Negative sense lead is open 5 The output is not in the disabled state 3 Bothe sense leads are open Query Syntax SENSe LEAD STATus Returned Parameters lt NR3 gt Examples SENS LEAD STAT SENSe FUNCtion This command configures the sensing function for triggered measurements The dc source has up to three measurement sensors as described below The query returns the function setting CURRent Senses the current measurement at the main output output 1 DVM Senses the voltage measurement at the DVM inputs Agilent 66321D 66
64. requires an external capacitor for stable operation Standard de source units are shipped from the factory with the output compensation set to HRemote mode HRemote mode setting provides the fastest transient response performance for phones with input capacitances greater than 5uF Most phones have input capacitances greater than 5 uF However the operation of the dc source may be momentarily unstable with phones that have input capacitances less than 5 uF or if the output sense leads are not connected and you are operating in HRemote mode NOTE If you want the unit to power up with a different compensation setting you must first save the desired settings in non volatile memory location 0 with the SAV command Use OUTP PON STAT RCLO to program the unit to power up with the location 0 settings 111 8 Language Dictionary Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Backward Compatibility Agilent 66311B D 66309B D OUTPut DFI OUTPut COMPensation MODE lt setting gt LLOCAL LREMOTE RLOCAL RREMOTE LLOCAL OUTP COMP MODE HREMOTE OUTPput COMPensation MODE lt CRD gt OUTP TYPE CAPacitance LOW mode corresponds to LLocal HIGH mode corresponds to HRemote This command enables or disables the discrete fault indicator DFI output from the dc source Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands OUTPut
65. talk or listen There is an error in the SCPI error queue Press the Error key to view the error code The interface is requesting service Immediate Action Keys Toggles the output of the selected output between the ON and OFF states When coupled turns both output channels ON or OFF Activates front panel control when the unit is in remote mode unless a Lockout command is in effect Resets the protection circuit and allows the unit to return to its last programmed state A toggle switch that enables or disables overcurrent protection 14 Quick Reference 1 Front Panel Menus At a Glance Sets the GPIB Address Selects language SCP1 Enables or disables Agilent 14575A remote front panel ON OFF Displays the firmware revision of the instrument Displays the serial number of the instrument RCLO hannel 172 000V 10 204A Measures the output voltage and current output 1 shown 172 500V MAX Measures the peak output voltage 11 000 MN Measures the minimum output voltage 112 330V HIGH Measures the high level of a voltage pulse waveform 10 080V LOW Measures the low level of a voltage pulse waveform 172 000V RMS Measures the rms voltage 10 3504 MAX Measures the peak output current 10 0504 MIN Measures the minimum output current 10 4004 HIGH Measures the high level of a current pulse waveform 10 012A LOW Measures the low level of a current pulse waveform 10 2104 RMS Measures the rms current 172 000V DC
66. the EMC Directive 89 336 EEC and carries the CE marking accordingly New Jersey May 1 2000 Location Date Bruce Krueger Quality Manager European Contact Your local Agilent Technologies Sales and Service Office or Agilent Technologies GmbH Department TRE Herrenberger Strasse 130 D 71034 Boeblingen FAX 49 703 1 14 3143 Acoustic Noise Information Herstellerbescheinigung Diese Information steht im Zusammenhang mit den Anforderungen der Maschinenlaminformationsverordnung vom 18 Januar 1991 Schalldruckpegel Lp lt 70 dB A Am Arbeitsplatz Normaler Betrieb Nach EN 27779 Typpriifung Manufacturer s Declaration This statement is provided to comply with the requirements of the German Sound Emission Directive from 18 January 1991 Sound Pressure Lp lt 70 dB A At Operator Position Normal Operation According to EN 27779 Type Test Printing History The edition and current revision of this manual are indicated below Reprints of this manual containing minor corrections and updates may have the same printing date Revised editions are identified by a new printing date A revised edition incorporates all new or corrected material since the previous printing date Changes to the manual occurring between revisions are covered by change sheets shipped with the manual In some cases the manual change applies only to specific instruments Instructions provided on the change sheet will indicate if a
67. the calibration mode change the calibration password calibrate current and voltage programming and store new calibration constants in nonvolatile memory NOTE _ If calibration mode has not been enabled with CALibrate STATe programming the calibration commands will generate an error You must also save any changes that you made using CALibrate SAVE otherwise all changes will be lost when you exit calibration mode CALibrate CURRent This command initiates the calibration of the positive dc output current as well as the high range current measurement circuit Command Syntax CALibrate CURRent SOURce DC POSitive Parameters None Examples CAL STAT 1 enable calibration CAL CURR start current calibration Related Commands CAL CURR NEG CAL LEV CAL DATA CALibrate CURRent2 Agilent 66319B D only This command initiates the current calibration of output 2 Command Syntax CALibrate CURRent2 Parameters None Examples CAL CURR2 Related Commands CAL CURR NEG CAL LEV CAL DATA CALibrate CURRent MEASure R3 This command initiates the calibration of the middle range current measurement circuit Command Syntax CALibrate CURRent MEASure R3 Parameters None Examples CAL CURR MEAS R3 Related Commands CAL CURR CALibrate CURRent MEASure LOWRange This command initiates the calibration of the low range current measurement circuit Command Syntax CALibrate CURRent MEASure DC LOWRange Parameters None Examples CAL CURR
68. the dc source is ASCII The data may be numerical or character string Numerical Data Formats Response Formats Digits with an implied decimal point assumed at the right of the least significant digit Examples 273 Digits with an explicit decimal point Example 0273 Digits with an explicit decimal point and an exponent Example 2 73E 2 Parameter Formats Extended format that includes lt NR1 gt lt NR2 gt and lt NR3 gt Examples 273 273 2 73E2 Expanded decimal format that includes lt NRf gt and MIN MAX Examples 273 273 2 73E2 MAX MIN and MAX are the minimum and maximum limit values that are implicit in the range specification for the parameter lt Bool gt Boolean Data Example 011 or ON OFF Suffixes and Multipliers Class Suffix Unit Unit with Multiplier Current A ampere MA milliampere Amplitude volt MV millivolt Time second MS millisecond Common Multipliers kilo milli micro Response Data Types Character strings returned by query statements may take either of the following forms depending on the length of the returned string lt CRD gt Character Response Data Permits the return of character strings lt AARD gt Arbitrary ASCII Response Data Permits the return of undelimited 7 bit ASCII This data type has an implied message terminator lt SRD gt String Response Data Returns string parameters enclosed in double quotes 67 6 Introduction to Programming SCPI
69. the output compensation Action Display 1 On the Function keypad press Output Then press VW until you obtain the COMP COMP HREMOTE command Use the key and select one of the four compensation modes Then press Enter Use HREMOTE or HLOCAL compensation for faster transient response when testing phones with input capacitances greater than 5 UF which applies for most phones Select local or remote depending on your sensing setup If operation of the dc source becomes momentarily unstable when testing phones that have input capacitances under 5 uF Use either LREMOTE or LLOCAL compensation 53 5 Front Panel Operation Setting the relay mode Agilent 66319B 66319D with Option 521 only Action 1 Use Output ON OFF to make sure that the output of the selected channel is off The output must be turned off before any relay settings take effect If the Dis annunciator is lit the output is off 2 Press Meter to return the display to Meter mode 3 Press Shift Channel to select either output channel or output channel 2 4 On the Function keypad press OUTPUT Then scroll to the REL MODE command Use the key to select one of the relay modes DD DH HD or HH then press Enter The Output ON mode is specified first followed by the Output OFF mode Relay settings cannot be coupled they must be set separately for each output Enable the output Action 1 On the Function keypad press Output On Off to enable the output The Dis ann
70. the relays when no current is flowing through them You can specify different relay options for the Output ON and Output OFF commands The following table describes the actions that occur based on the relay mode selection in response to the ON or OFF commands Table 2 5 Option 521 Relay Modes Relay Mode Output ON Output OFF Dry D 1 Closes the output relay 1 Downprograms the output 2 Closes the sense relay 2 Opens the sense relay 3 Programs the output 3 Opens the output relay Hot H 1 Programs the power mesh 1 Opens the sense relay 2 Closes the output relay 2 Opens the output relay 3 Closes the sense relay 3 Downprograms the power mesh The relay modes are stored in non volatile memory The last selected mode will be restored when the unit is turned on When shipped from the factory the relay mode for both output 1 and output 2 is set to Output ON Hot Output OFF Hot HH The RST command has no effect on the relay mode NOTES Even with open sense lead detection enabled the de source does not check for open sense leads when output 1 is enabled if the Output ON relay mode is set to Hot On output 1 and output 2 with the Output OFF relay mode set to Hot any external output capacitors will not be downprogrammed or discharged This is because the output relay opens prior to the downprogramming of the power mesh With either output 1 or output 2 disabled the output voltage readback will not be correct This is because th
71. the two screws using a 15 Torx drive Replace the two screws on the bottom of the unit using a 15 Torx drive Remember to replace the foot if you previously removed it to access the screw Reconnect the power cord and turn on the unit 173 E Line Voltage Conversion orange spare 120 VAC 220 VAC orange Top part of _ white violet Top part of white violet transformer white yellow transformer white yellow Front of unit white red grey Front of unit orange spare 100 VAC 230 VAC orange Top part of white violet transformer white yellow Top part of white violet transformer white yellow white red grey Front of unit white red grey Front of unit white orange All voltages white red red white red _ white black Bottom part of white brown transformer black white black white grey Front of unit Figure E 1 Power Transformer AC Input Connections 174 49 56 57 58 sense open 32 RST 161 sense open 32 sense open 32 terminals 28 S S terminals 28 0 0 9 51 A AARD 67 ABORT 124 ac line conversion
72. transition in the output voltage or current FETCh queries do not trigger the acquisition of new measurement data but they can be used to return many different calculations from the data that was retrieved by the acquisition trigger Note that if you acquired voltage data you can fetch only voltage calculations NOTE For each MEASure query there exists a corresponding FETCh query FETCh queries perform the same calculation as MEASure queries but do not acquire new data Current Ranges and Measurement Detector The dc source has three current measurement ranges The command that controls the ranges is SENS CURR RANG lt value gt MIN MAX Enter the value of the current that you expect to measure When the range is set to 3A the maximum current that can be measured is the maximum rating of the unit Other current ranges are as follows 3A Range 0 through MAX see Table A 2 1A Range O through 1 A 0 02A Range 0 through 0 02 A MIN The dc source also has two measurement detectors Check that the current detector is set to ACDC when measuring current pulses or other waveforms with a frequency content greater than a few kilohertz SENS CURR DET ACDC Select DC as the measurement detector if you are making only DC current measurements and you require a measurement offset better than 2mA on the High current measurement range Note that this selection gives inaccurate results on current waveforms that have ac content SEN
73. under CV Load Effect 146 Performance Calibration and Configuration B CV Source Effect performance This test measures the change in output voltage that results from a change in ac line voltage from the minimum to maximum value within the line voltage specifications Turn off the dc source and connect the ac power line through a variable voltage transformer Connect the output as shown in Figure B 1a with the DVM connected between the S and the S terminals Set the transformer to nominal line voltage Turn on the de source and program the current to the maximum programmable value Imax and the output voltage to the full scale value in Table B 2 Adjust the load for the full scale current value in Table B 2 as indicated on the front panel display The CV annunciator on the front panel must be on If it is not adjust the load so that the output current drops slightly Adjust the transformer to the lowest rated line voltage e g 104 Vac for a 115 Vac nominal line voltage input Record the output voltage reading on the DVM Adjust the transformer to the highest rated line voltage e g 127 Vac for 115 Vac nominal line voltage input Record the output voltage reading on the DVM The difference between the DVM reading is steps f and h is the source effect voltage and should not exceed the value listed in the performance test record card for the appropriate model under CV Source Effect CV Noise performance Period
74. 0 Shift key N Press up arrow until MATH function is selected then press gt Press up arrow until STAT function is selected then press ENTER Set up voltmeter to read the average of the measurements as follows Press Shift key f1 Shift key N Press down arrow until RMATH function is selected then press gt Press up arrow until MEAN function is selected then press ENTER Execute the program by pressing f0 ENTER TRIG ENTER Wait for 100 readings and then read the average measurement by pressing f1 ENTER To repeat the measurement perform steps e and f CC Load Effect performance This test measures the change in output current for a change in load from full scale output voltage to short circuit a Turn off the dc source and connect the output as shown in Figure B 1b with the DVM connected across the current monitoring resistor Turn on the dc source and if it was set to low range readback in the previous test set it back to high or auto Program the current to full scale and the output voltage to the maximum programmable voltage value Vmax in Table B 2 Adjust the load in the CV mode for the UUT full scale voltage in Table B 2 as indicated on the front panel display Check that the CC annunciator of the UUT is on If it is not adjust the load so that the output voltage drops slightly Record the output current reading DVM reading current monitor resistance value in ohms You may want to use th
75. 0 01 OPC This command causes the instrument to set the OPC bit bit 0 of the Standard Event Status register when the dc source has completed all pending operations See ESE for the bit configuration of the Standard Event Status register Pending operations are complete when all commands sent before OPC have been executed This includes overlapped commands Most commands are sequential and are completed before the next command is executed Overlapped commands are executed in parallel with other commands Commands that affect output voltage current or state relays and trigger actions are overlapped with subsequent commands sent to the dc source The OPC command provides notification that all overlapped commands have been completed all triggered actions are completed 133 8 Language Dictionary OPC does not prevent processing of subsequent commands but bit O will not be set until all pending operations are completed OPC causes the instrument to place an ASCII 1 in the Output Queue when all pending operations are completed Unlike OPC OPC prevents processing of all subsequent commands It is intended to be used at the end of a command line so that the application program can then monitor the bus for data until it receives the 1 from the de source Output Queue Command Syntax OPC Parameters None Query Syntax OPC Returned Parameters lt NRI gt 1 Related Commands OPC TRIG WAI OPT This query reques
76. 0 samples use SENS SWE H NT 46 8E 6 POIN 1500 Note that reducing the number of sample points increases the speed of the measurement however the tradeoff is greater measurement uncertainty in the presence of noise Window Functions The dc source lets you select from two measurement window functions Hanning and Rectangular To select a window function use SENS WIND HANN RECT As shipped from the factory the dc source measurement functions use a Hanning window The Hanning window applies a cos weighting function to the data in the measurement buffer when computing average and rms measurements This returns accurate data even if an integral number of waveform cycles are not captured provided that at least three or more waveform cycles are in the measurement buffer If there are only one or two waveform cycles the Hanning window will not give accurate results With a Rectangular window no weighting function is applied to the data in the measurement buffer However to use the Rectangular window function to return accurate data for one or more waveform cycles an integral number of waveform cycles must be captured in the measurement buffer This means that you must accurately know the waveform period beforehand In this way you can chose the sample interval and the number of data points so that an integral number of waveform cycles will end up in the measurement buffer Measuring Output 2
77. 0A If an overvoltage overcurrent overtemperature or remote inhibit condition occurs the Prot annunciator on the front panel will be on and the dc source will disable its output If necessary you can disable the overcurrent or overvoltage protection circuit if its operation interferes with the proper operation of your phone test Note that if you disable the overvoltage protection the equipment under test will not be protected from output voltage overshoot conditions You can also disable the broken sense lead detect circuit if you have an application where an external voltage applied to the output may interfere with the broken sense lead detect circuitry Error messages can occur at any time during the operation of the unit When the Err annunciator on the front panel is on it means that either an error has occurred on the GPIB bus or a selftest error has occurred Appendix C lists error numbers and descriptions Query and clear the dc source overcurrent protection as follows Action On the Function keypad press Protect In this example an over current condition has occurred Refer to Table 4 2 for other protection indicators On the Function keypad press Current This displays the present current limit To restore normal operation after the cause of the overcurrent condition has been removed press Shift Prot Clr The Prot annunciator then will go off To disable overcurrent protection press Shift OCP This key toggles between OC
78. 161 B Performance Calibration and Configuration The Configuration function consists of the following menu commands Press this key to access the calibration menu Simultaneously press these keys to access the configuration menu Notes Display CFG EXIT CFG FACTORY CFG COMP lt char gt CFG COUP lt char gt CFG RELAY 1 lt char gt CFG RELA Y2 lt char gt CFG OVP lt char gt CFG SAVE CFG UNDO Command Function Exits the configuration menu and returns to meter mode Also exits calibration mode Changes not previously saved are lost Returns the RST state to the factory default settings Sets the output compensation mode Sets the output coupling mode Sets the output 1 relay mode Option 521 units only Sets the output 2 relay mode Option 521 units only Sets the overvoltage protection mode Stores the current settings in nonvolatile RAM Cancels any changes that have been made but not yet saved char a character string parameter Use and Use and to scroll through the menu commands to scroll through the menu parameters Once the configuration function is started the front panel will remain in the configuration mode No other functions can be accessed from the keypad To exit the configuration function the CFG EXIT command must be executed Each configuration command is only executed after the Enter key is pressed An OKAY message is displayed to indicate that an action has been taken When the
79. 319D only VOLTage Senses the voltage measurement at the main output output 1 Command Syntax SENSe FUNCtion lt function gt Parameters VOLTage CURRent DVM Examples SENS FUNC VOLT Query Syntax SENSe FUNCtion Returned Parameters lt SRD gt SENSe PROTection STATe This command enables or disables the open sense lead detection The default setting for this function is disabled To permanently enable open sense lead detection program this command on save this state in location 0 using SAV 0 and set the output power on state to recall state 0 OUTP PON STAT RCL 0 Command Syntax SENSe PROTection STATe lt bool gt Parameters OFF 110ON RST Value 0 Examples SENS PROT STAT ON Query Syntax SENSe PROTect STATe Returned Parameters lt NR3 gt SENSe SWEep OFFSet POINts This command defines the offset in a data sweep when an acquire trigger is used Negative values represent data samples taken prior to the trigger Positive values represent the delay after the trigger occurs but before the samples are acquired Command Syntax SENSe SWEep OFFSet POINts lt NRf gt Parameters 4095 through 2 000 000 000 RST Value 0 Examples SENS SWE OFFS POIN 2047 Query Syntax SENSe SWEep OFFSet POINts Returned Parameters lt NR3 gt Related Commands SENS SWE TINT SENS SWE POIN MEAS ARR 108 SENSe SWEep POINts Language Dictionary 8 This command defines the number of points in a measurement Command Synta
80. 48 data points but measurement uncertainty due to noise will increase 141 A Specifications Table A 2 Supplemental Characteristics continued Parameter es ee All Models Calibration Interval from the date the unit is put into service 1 year recommended Regulatory Compliance Listing pending UL 3111 1 Certified to CSA 22 2 No 1010 1 Conforms to IEC 1010 1 EN 61010 1 Complies with EMC directive 89 336 EEC ISM Group Class B Dimensions 88 1 mm 3 5in see figure 3 1 212 8 mm 8 4in 435 mm 17 125 in Net weight 807g 20s Oo S meas Table A 3 Agilent 66321D 66319D DVM Specifications and Characteristics Shipping weight ogee Performance Specifications warranted from 0 to 55 C unless otherwise noted DC Readback Accuracy 25 C 5 C feet 0 04 5 mV AC DC rms Readback Accuracy 60 Hz to 10 kHz 1 5 mV 25 C 5 C with dc plus a sinewave input gt 25mV rms 45 60 Hz and 10 20 kHz 4 5 mV Common Mode Voltage Range from either DVM input with respect to the negative output terminal of Output 1 Maximum DC Differential Voltage i 25 V peak Maximum AC Differential Voltage with a sinewave input 10 V rms Supplemental Characteristics Maximum Continuous Input Capability without damage 50 V between input terminals or from either input to chassis ground Input Resistance from either DVM input with respect to 20 MQ either output terminal of Output 1 4 5 Vpk to 2
81. 5 ge gt Input Capacitance on either input terminal lt 60 pF DC Common Mode Rejection Ratio gt 83 dB Voltage Readback Resolution Front panel 1 mV GPIB lt 0 2 mV 0 002 0 2 mV Readback Temperature Coefficient change per C 15 mV for dc plus sinewave input lt 25 mV rms To accept 10 Vrms sinewave input the common mode voltage with respect to the negative terminal of output 1 must be 10 Vdc This is required to center the DVM in its common mode range Table A 4 Agilent 66319B D Option 521 Characteristics Output Impedance Output 1 500k ohms Output OFF Ouptut 2 200k ohms Solid State Relay Current rise time Relay mode Hot 100 microseconds from 10 to 90 of the total output change Solid State Relay Current fall time Relay mode Hot 50 microseconds from 10 to 90 of the total output change 142 Performance Calibration and Configuration Introduction This appendix contains test procedures to verify that the dc source is operating normally and is within published specifications There are four types of tests as follows Built in Self Tests These tests run automatically when the dc source is turned on They check most of the digital circuits and the programming and readback DACs Turn on Checkout These tests described in chapter four provide a high degree of confidence that your unit is operating properly Calibration These tests verify that the dc source is properly calibrated Pe
82. 5 This address can only be changed from the front panel using the Address menu located under the Address key Set the GPIB address as follows Action Display 1 On the System keypad press Address ADDRESS 5 2 Enter the new address For example Press Enter Number 7 Enter ADDRESS 7 59 5 Front Panel Operation 10 Storing and Recalling Instrument States You can save up to 4 states from location 0 to location 3 in non volatile memory and recall them from the front panel All programmable settings are saved This capability is only available when the unit is set to the SCPI programming language NOTE You can program the unit to automatically power on according to the instrument state that is saved in state 0 as shown in the third example Save an instrument state in location 0 as follows Action 1 Set the instrument to the state that you want to save 2 Save this state to location 0 Press Save Enter Number 0 Enter Recall a saved state as follows Action 1 Recall the state saved in location 0 by pressing Recall Enter Number 0 Enter Select the power on state of the dc source as follows Action 1 On the Function keypad press Output and scroll through the Output menu until you get to the PON state command 2 Use the and v keys to select either RST or RCLO RST sets the power on state of the unit as defined by the RST command RCLO sets the power on state of the unit to the state saved in RCL lo
83. 6 0348648 0327249 030371 031655 0333669 0340089 031449 031227 030371 031655 0327249 031869 0327249 0340089 2 32438 0836549 0322969 0333669 18632 0245932 1371 0314077 0320829 0337949 O9751 0245932 031227 031869 0348648 031441 031869 031655 97661 0258772 40325109 0327249 3 1814 0280171 0327249 0329389 0327249 0337949 0329389 031655 3 18632 0284451 0333669 031869 3 14266 031013 031227 031869 031227 031449 031869 0320829 3 14523 0275891 3 340089 31655 13667 31655 30799 322869 327249 333669 293011 31227 13496 329389 Example Programs D Voltage Pulse Measurement Using VISA Library Calls include lt visa h gt include lt stdio h gt for printf include lt stdlib h gt ViStatus main void ViSession defRM instrumentHandle ViStatus err ViReal64 measvoltage meascurrent ViReal64 resultDC resultRMS resultMIN resultMAX resultHIGH resultLOW ViReal64 voltArray 10 VilInt32 i numReadings initialize the VISA session rr viOpenDefaultRM amp defRM if err printf viOpenDefaultRM error check your hardware connections n exit 1 Open the instrument at address 5 for Communication rr viOpen defRM GPIBO 5 INSTR VI_NULL 5000 amp instrumentHandle if err viClose defRM printf viOpen error check the device at address 5 n exit 1
84. 75 mA 0 5 mV 0 75 mA Peak current for up to a 7 millisecond time period Average current cannot exceed 3 A Peak current for up to a 1 millisecond time period Average current cannot exceed 1 5 A 30 05 2 3mA when programming between zero and 0 03 of full scale current Applies with current detector set to DC ACDC mode accuracy is 0 2 3mA for sourcing and 0 2 3 6 mA for sinking gt This specification may degrade slightly when the unit is subjected to an RF field gt 3 V meter Specification is for phone capacitance greater than 6uF 7 With resistance set to zero ohms 8 Following a 0 1 A to 1 5 A load change in the HRemote compensation range 3 Following a 0 75 A to 1 5 A load change Agilent 66319B D output 2 only 0 2 40 mV 0 2 4 5 mA NA 0 2 15 mV 0 2 3 mA NA NA NA 1 mV 6 mv 2 mA 1 6 mV 0 375 mA 0 4 mV 0 25 mA lt 400 us 139 A Specifications Supplemental Characteristics Table A 2 lists the supplemental characteristics which are not warranted but are descriptions of typical performance determined either by design or type testing Table A 2 Supplemental Characteristics Parameter Agilent 66321B D Agilent 66319B D Agilent 66319B D output 2 only output 1 only Output Programming Range Voltage 0 15 535 V 0 12 25 V Current 0 3 0712 A 0 1 52 A Resistance 40 mQ tol Q NA Voltage Limit 0 22 V Average Programming Resolution Voltage 4 2 mV Current 0 825
85. 8 measurements 36 F either 131 electronic load 145 enabling the output 71 enter value 53 54 entry keys 51 51 0 9 51 Backspace 51 Clear Entry 51 Enter Number 51 error messages 43 error numbers 163 errors 55 example programs 167 pulse measurement 167 169 external relays 29 F fault indicator discrete 89 remote inhibit 89 fetch commands 75 76 79 100 FLT 59 90 FLT output 38 format commands 100 FORM 100 BORD 101 front panel 45 annunciators 14 annuncuiators 46 buffer size 56 57 58 controls 20 controls and indicators 45 immediate actions 14 keys 46 measurements 56 57 58 menus 15 time interval 56 57 58 using 13 function keys 48 A 48 Cal 50 Current 50 immediate action 48 Input 49 Meter 49 OCP 48 Output 50 Output On Off 48 OV 50 Prot Clear 48 Protect 50 Voltage 50 fuse 26 generating measurement triggers 81 82 generating triggers 74 GP IB 59 address 59 63 capabilities of the dc source 63 command library for MS DOS 61 connections 40 controller programming 61 IEEE Std for standard codes 61 IEEE Std for standard digital interface 61 interface 40 references 61 triggers 82 ground earth 18 guide user s 17 Hanning 76 109 header 66 long form 66 short form 66 High measurements 78 history 7 HLocal 34 111 hot switch 23 111 HRemote 34 111 impedance 29 INH 59 89 INH input 38
86. ALC REF HIGH MEASure CURRent LOW FETCh CURRent LOW These queries return the Low level current of a current pulse waveform The instrument first measures the minimum and maximum data points of the pulse waveform It then generates a histogram of the pulse waveform using 16 bins between the maximum and minimum data points The bin containing the most data points below the 50 point is the low bin The average of all the data points in the low bin is returned as the Low level If no low bin contains more than 1 25 of the total number of acquired points then the minimum value is returned by these queries Query Syntax MEASure SCALar CURRent LOW FETCh SCALar CURRent LOW Parameters None Examples MEAS CURR LOW FETC CURR LOW Returned Parameters lt NR3 gt Related Commands MEAS CURR HIGH CALC REF LOW MEASure CURRent MAXimum FETCh CURRent MAXimum These queries return the maximum output current Query Syntax MEASure SCALar CURRent MAXimum FETCh SCALar CURRent MA Ximum Parameters None Examples MEAS CURR MAX FETC CURR MAX Returned Parameters lt NR3 gt Related Commands MEAS CURR MIN 103 8 Language Dictionary MEASure CURRent MINimum FETCh CURRent MINimum These queries return the minimum output current Query Syntax MEASure SCALar CURRent MINimum FETCh SCALar CURRent MINimum Parameters None Examples MEAS CURR MIN FETC CURR MIN Returned Parameters lt NR3 gt Relate
87. ANsient lt bool gt INSTrument COUPle OUTPut STATe lt state gt MFEASure CURRent2 VOLTage2 MEASure FETCh ARRay CURRent DC VOLTage DC SCALar CURRent DC ACDC HIGH LOW MAX MIN 92 Resets the trigger system to the Idle state Calibrate positive output current and high current measurement range Calibrate middle current measurement range Calibrate low current measurement range Calibrate ac current measurement circuits Calibrate output2 current Sets and reads the calibration date Calibrate DVM voltage readback Advance to next calibration step P1 P2 Set calibration password Calibrate output resistance Save new cal constants in non volatile memory Enable or disable calibration mode Calibrate output voltage and voltage readback Calibrate output2 voltage Enable disable front panel display Select the output that is displayed 1 2 Set display mode NORM TEXT Sets the text that is displayed Specifies data type and length for all array queries Specifies byte order for all array queries Enable the numbered trigger system sequence 1 2 Enable the named trigger system sequence TRAN ACQ Enable continuous output transient triggers Enable continuous output transient triggers Couples or decouples output 1 and output 2 NONE or ALL Returns the output 2 current measurement Returns the output 2 voltage measurement Returns the digitized instantaneous current Retu
88. Ammeter resistor DVM scope on rms Voltmeter for CV tests Electronic 5 Electronic Load Load DVM connector connect this lead only when calibrating the unit DC Output 1 connector DC Load Voltmeter Ammeter resistor 400 ohm Ee External External DC DC supply cae only for verification Figure B 1 Verification and Calibration Test Setup 144 Performance Calibration and Configuration B Electronic Load Many of the test procedures require the use of a variable load capable of dissipating the required power If a variable resistor is used switches should be used to either connect disconnect or short the load resistor For most tests an electronic load can be used The electronic load is considerably easier to use than load resistors but it may not be fast enough to test transient recovery time and may be too noisy for the noise PARD tests Fixed load resistors may be used in place of a variable load with minor changes to the test procedures Also if computer controlled test setups are used the relatively slow compared to computers and system voltmeters settling times and slew rates of the dc source may have to be taken into account Wait statements can be used in the test program if the test system is
89. Command Completion SCPI commands sent to the dc source are processed either sequentially or in parallel Sequential commands finish execution before a subsequent command begins Parallel commands allow other commands to begin executing while the parallel command is still executing Commands that affect trigger actions are among the parallel commands The WAI OPC and OPC common commands provide different ways of indicating when all transmitted commands including any parallel ones have completed their operations The syntax and parameters for these commands are described in chapter 8 Some practical considerations for using these commands are as follows WAI This prevents the dc source from processing subsequent commands until all pending operations are completed OPC This places a 1 in the Output Queue when all pending operations have completed Because it requires your program to read the returned value before executing the next program statement OPC can be used to cause the controller to wait for commands to complete before proceeding with its program ORC This sets the OPC status bit when all pending operations have completed Since your program can read this status bit on an interrupt basis OPC allows subsequent commands to be executed NOTE The trigger subsystem must be in the Idle state for the status OPC bit to be true As far as triggers are concerned OPC is false whenever the trigger subsystem is in the Initiated
90. DVM Measures the dc voltage on the DVM input 172 000V RVS DVM Measures the rms voltage on the DVM input 1 2VOLT 2 000 Sets the voltage of output 2 2 2 CURR 1 000 Sets the current limit of output 2 2 ARST Places the dc source in the factory default state COUPLING ALL Couples or decouples output 1 and output 2 NONE or ALL COMP LLOCAL Sets the output compensation HREMOTE LREMOTE HLOCAL or LLOCAL PON STATE RST Select the power on state command RST or RCLO PROT DLY 0 08 Sets the output protection delay in seconds RI LATCHING Sets the remote inhibit mode LATCHING LIVE or OFF DFI OFF Sets the discrete fault indicator state ON or OFF DFI SOUR OFF Selects the DFI source QUES OPER ESB RQS or OFF PORT RIDFI Sets the output port functions RIDFI DIGIO or TRIGGER DIGIO7 Sets and reads the I O port value 0 through 7 SENSE PROT OFF Enables or disables the open sense lead detect circuit ON or OFF 1REL MODE DD Sets the relay mode for Option 521 units DD HD DH or HH output 1 shown Sets the programmable voltage limit for output 1 PROT STAT ON Enables or disables overvoltage protection for output 1 ON or OFF CURR RANG MAX Sets the current range 3A 1A 0 02A or AUTO CURR DET ACDC Sets the current measurement detector ACDC or DC TINT 46 8 Sets the time interval for a front panel measurement in seconds Sets the buffer size for a front panel measurement Use aia and to select parameters table shows factory d
91. EDIES THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER S SOLE AND EXCLUSIVE REMEDIES AGILENT SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY ASSISTANCE The above statements apply only to the standard product warranty Warranty options extended support contacts product maintenance agreements and customer assistance agreements are also available Contact your nearest Agilent Technologies Sales and Service office for further information on Agilent Technologies full line of Support Programs Safety Summary The following general safety precautions must be observed during all phases of operation of 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 Agilent Technologies assumes no liability for the customer s failure to comply with these requirements GENERAL This product is a Safety Class 1 instrument provided with a protective earth terminal The protective features of this product may be impaired if it is used in a manner not specified in the operation instructions Any LEDs used in this product are Class 1 LEDs as per IEC 825 1 This ISM device complies with Canadian ICES 001 Cet appareil ISM est conforme la norme NMB 001 du Canada ENVIRONMENTAL CONDITIONS This instrument is intended for
92. EQuence2 COUNt VOLTage TRIGger ACQuire COUNt VOLTage This command sets up a successive number of triggers for measuring voltage data With this command the trigger system needs to be initialized only once at the start of the acquisition period After each completed measurement the instrument waits for the next valid trigger condition to start another measurement This continues until the count has completed Command Syntax TRIGger SEQuence2 COUNt VOLTage lt NRf gt TRIGger ACQuire COUNt VOLTage lt NRf gt Parameters 1 to 100 RST Value 1 Examples TRIG SEQ2 COUN VOLT 5 TRIG ACQ COUN VOLT 1 Query Syntax TRIGger SEQuence2 COUNt VOLTage TRIGger ACQuire COUNt VOLTage Returned Parameters lt NR3 gt Related Commands TRIG SEQ2 TRIG ACQ TRIGger SEQuence2 HYSTeresis CURRent TRIGger ACQuire HYSTeresis CURRent This command defines a band around the trigger level through which the signal must pass before an internal measurement can occur The band limit above and below the trigger level is one half of the hysteresis value added to or subtracted from the trigger level For a positive trigger to occur the excursion of an output waveform in the positive direction must start below the lower hysteresis band limit and pass through the upper hysteresis band limit For a negative trigger to occur the excursion of an output waveform in the negative direction must start above the upper hysteresis band limit and pass through the lowe
93. Guide Angle brackets lt gt Items within angle brackets are parameter abbreviations For example lt NR1 gt indicates a specific form of numerical data Vertical bar Vertical bars separate alternative parameters For example NORM TEXT indicates that either TEXT or NORM can be used as a parameter Square Brackets Items within square brackets are optional The representation SOURce VOLTage means that SOURce may be omitted Braces Braces indicate parameters that may be repeated zero or more times It is used especially for showing arrays The notation lt A gt lt B gt shows that parameter A must be entered while parameter B may be omitted or may be entered one or more times Boldface font Boldface font is used to emphasize syntax in command definitions TRIGger COUNt CURRent lt NRf gt shows command definition Computer font Computer font is used to show program lines in text TRIGger COUNt CURRent 10 shows a program line 63 6 Introduction to Programming Types of SCPI Commands SCPI has two types of commands common and subsystem Common commands generally are not related to specific operation but to controlling overall dc source functions such as reset status and synchronization All common commands consist of a three letter mnemonic preceded by an asterisk RST IDN SRE 8 Subsystem commands perform specific dc source functions They are organized into an inverted tree
94. Information Safety Considerations This dc source is a Safety Class 1 instrument which means it has a protective earth terminal That terminal must be connected to earth ground through a power source equipped with a ground receptacle Refer to the Safety Summary page at the beginning of this guide for general safety information Before installation or operation check the dc source and review this guide for safety warnings and instructions Safety warnings for specific procedures are located at appropriate places in the guide Options and Accessories Table 2 1 Options 87 106 Vac 47 63 Hz 104 127 Vac 47 63 Hz 191 233 Vac 47 63 Hz 207 253 Vac 47 63 Hz Delete instrument feet option Output compensation is factory set to HRemote mode for best transient response Refer to chapter 3 under Output Compensation for more information Rack mount kit for two side by side units of equal depth Consists of Lock link kit p n 5061 9694 and Flange kit p n 5062 3974 Rack mount kit for one unit p n 5062 3972 Solid state relays to connect and disconnect the output of the de source Agilent 66319B D only Provides the ability to either Hot switch or Dry switch the solid state relays Device characterization software for displaying current and voltage measurements Support rails are required when rack mounting units Use E3663A support rails for Agilent rack cabinets If you are using non Agilent rack cabinets contact
95. LOP CURR N TRIG ACQ SLOP VOLT NEG lt _______ Measurement time time interval X number of points gt Figure 7 5 Commands Used to Control Internal Measurement Triggers To specify the current level that will generate triggers for both positive and negative going signals use TRIG SEQ2 LEV CURR lt value gt or TRIG ACQ LEV CURR lt value gt To specify the slope on which triggering occurs use the following commands You can specify a POSitive a NEGative or EITHer type of slope RIG SEQ2 SLOP CURR lt slope gt or RIG ACQ SLOP CURR lt slope gt J oH o specify a hysteresis band to qualify the positive or negative going signal use TRIG SEQ2 HYST CURR lt value gt or TRIG ACQ HYST CURR lt value gt NOTE When using internal triggers do not INITiate the measurement until after you have specified the slope level and hysteresis When the acquisition finishes any of the FETCh queries can be used to return the results Once the measurement trigger is initiated if a FETCh query is sent before the data acquisition is triggered or before it is finished the response data will be delayed until the trigger occurs and the acquisition completes This may tie up the computer if the trigger condition does not occur immediately 82 Programming the DC Source 7 One way to wait for results without tying up the computer is to use the SCPI co
96. LT 8 000 Voltage On the Entry keypad press or to select the digit in the numeric field that you wish to change For example move the flashing digit to the ones column to change a value in this column Then press to scroll from 7 000 to 8 000 Then press Enter Set the output current limit Action Display 1 To enter an approximate value without using the current menu On the Entry keypad 8 003V 0 400A press or to select the tenths digit in the current field Rotate the front panel RPG knob to obtain 0 4A If the unit is in CV mode you will not see the output current change until the current setting is low enough to cause the unit to go into CC mode 2 The easiest way to enter an accurate value On the Function keypad press Current CURR 0 400 On the Entry keypad press Enter Number 4 Enter 3 To make minor changes to an existing value press Current The procedure to change an individual digit is explained in step 3 under Set the output voltage NOTE To output currents pulses greater than 3 A and up to 5 A peak you must set the output current limit to greater than 3 amperes 3 0712 amperes max Set the output resistance Action Display 1 On the Function keypad press Shift Res On the Entry keypad press Enter RES 0 500 Number 0 5 Enter 2 To make minor changes to an existing value press Shift Res The procedure to change an individual digit is explained in step 3 under Set the output voltage Set
97. N Measures minimum output current lt reading gt A HIGH Measures the high level of a current waveform lt reading gt A LOW Measures the low level of a current waveform lt reading gt A RMS Measures rms current lt reading gt V DC DVM Measures de voltage on DVM input lt reading gt V RMS DVM Measures rms voltage on DVM input Press this key to access the following metering functions Display Command Function CURR RANGE lt char gt Select current range 3A 1A 1 0 02A AUTO CURR DET lt char gt Select current measurement bandwidth ACDC DC TINT lt value gt Sets the front panel measurement interval in seconds 15 6 us to 1 second POINTS lt char gt Sets the of points in front panel measurement buffer 1 2 4 8 16 32 64 128 256 512 1024 2048 only valid for Agilent 66321D 66319D reading the returned measurement value a numeric value char a character string parameter Use a__ and __ to scroll through the menu commands Use m and to scroll through the menu parameters Use e and B to select a digit in a numeric entry field 49 5 Front Panel Operation Output Control Keys Output control keys control the output functions of the dc source Notes 50 Press this key to access the voltage menu Display VOLT lt value gt VOLT lt value gt LIMIT lt char gt Command Function Sets the voltage of output 1 the main output of all models Sets the voltage of output 2 Sets t
98. OP VOLT TRIG ACQ SOUR TRIG TRAN SOUR 10 of MAX 10 of MAX 10 of MAX OFF 0 0 15 VO POS POS POS INTERNAL BUS You can change the factory default RST settings for the OUTput COMPensation COUPling RELay and PROTection parameters Refer to Appendix B for details RST Command Syntax Parameters None Related Commands PSC SAV 135 8 Language Dictionary SAV This command stores the present state of the dc source to the specified location in non volatile memory Up to 4 states can be stored If a particular state is desired at power on it should be stored in location 0 It will then be automatically recalled at power turn on if OUTPut PON STATe is set to RCLO Use RCL to retrieve instrument states Command Syntax SAV lt NRf gt Parameters 0111213 Example SAV 3 Related Commands RCL RST CAUTION SAV causes a write cycle to nonvolatile memory Nonvolatile memory has a finite maximum number of write cycles Programs that repeatedly cause write cycles to nonvolatile memory can eventually exceed the maximum number of write cycles and cause the memory to fail SRE This command sets the condition of the Service Request Enable Register This register determines which bits from the Status Byte Register see STB for its bit configuration are allowed to set the Master Status Summary MSS bit and the Request for Service RQS summary bit A 1 in any Service Request Enable Register bit position enable
99. P enabled and disabled The OCP annunciator is off when OCP is disabled Disable Overvoltage Protection as follows 1 On the Function keypad press Shift OV Use the W key and select OFF to disable the overvoltage protection function Then press Enter To recall this state when the unit turns on save this state in location 0 and set the power on state to RCL 0 see example 10 Query and Clear Errors as follows 1 On the Function keypad press Shift Error This displays and clears the error in the error queue Repeatedly press these keys to clear all errors in the queue If errors persist your unit may require service Display OVERCURRENT CURR 3 0712 PROT STAT OFF ERROR 0 55 5 Front Panel Operation 5 Making Basic Front Panel Measurements As shipped from the factory front panel measurements for the main output output 1 are calculated from a total of 2048 readings taken at a 46 8 microsecond sampling rate The unit alternates between voltage and current measurements Therefore the data acquisition time for a single front panel voltage or current measurement is about 100 milliseconds This sampling rate and data acquisition time combined with a built in windowing function reduces errors due to sampling a non integral number of cycles of a waveform for frequencies of 25 Hz or greater Note that the windowing function is less accurate when measuring output waveforms for frequencies less than 25 Hz causing
100. S 123 system errors 163 system keys 47 Address 47 Error 47 Interface 47 Local 47 RCL 47 Save 47 Shift 47 T transient recovery 147 transient response 139 trigger commands 124 TRIG 125 TRIG ACQ 126 TRIG ACQ COUN CURR 126 TRIG ACQ COUN DVM 126 TRIG ACQ COUN VOLT 127 TRIG ACQ HYST CURR 127 TRIG ACQ HYST DVM 128 TRIG ACQ HYST VOLT 128 TRIG ACQ LEV CURR 129 TRIG ACQ LEV DVM 129 TRIG ACQ LEV VOLT 130 179 Index TRIG ACQ SLOP CURR 130 TRIG ACQ SLOP DVM 130 TRIG ACQ SLOP VOLT 131 TRIG ACQ SOUR 131 TRIG SEQ1 DEF 132 TRIG SEQ2 126 TRIG SEQ2 COUN CURR 126 TRIG SEQ2 COUN DVM 126 TRIG SEQ2 COUN VOLT 127 TRIG SEQ2 DEF 132 TRIG SEQ2 HYST CURR 127 TRIG SEQ2 HYST DVM 128 TRIG SEQ2 HYST VOLT 128 TRIG SEQ2 LEV CURR 129 TRIG SEQ2 LEV DVM 129 TRIG SEQ2 LEV VOLT 130 TRIG SEQ2 SLOP CURR 130 TRIG SEQ2 SLOP DVM 130 TRIG SEQ2 SLOP VOLT 131 TRIG SEQ2 SOUR 131 TRIG SOUR 125 trigger offset 84 triggering output changes 73 180 triggers multiple 74 83 single 74 82 types of SCPI commands 64 U UNR annunciator 22 V voltage 71 maximum 72 voltage programming 146 VXIplug amp play 17 W waiting for measurement results 83 warranty 2 wire current ratings 28 Agilent Sales and Support Office For more information about Agilent Technologies test and measurement products applications services and for a current sales office
101. S CURR DET DC RMS Measurements To read the rms content of a voltage or current waveform use MEAS VOLT ACDC or MEAS CURR ACDC This returns the ac dc rms measurement Making rms or average measurements on ac waveforms for which a non integral number of cycles of data has been acquired may result in measurement errors due to the last partial cycle of acquired data The instrument reduces this error by using a Hanning window function when making the measurement If the measurement readings vary from sample to sample try increasing the data acquisition time to reduce measurement error 77 7 Programming the DC Source Pulse Measurements After pulse data has been acquired use FETCh queries to return measurement data in the shortest time FETCh queries do not trigger the acquisition of new measurement data but return different calculations from the data that was acquired If you acquired voltage data you can fetch only voltage measurements if you acquired current data you can fetch only current measurements otherwise an error will occur The dc source has several measurement queries that return key parameters of pulse waveforms as shown in Figure 7 3 FETC CURR MAX FETC VOLT MAX 7 FETC CURR HIGH FETC VOLT HIGH FETC CURR LOW FETC VOLT LOW DATA POINTS FETC CURR MIN lt FETC VOLT MIN Figure 7 3 Measurement Commands Used to Return Pulse Data Minimum and Maximum
102. SLOPe VOLTage lt slope gt Parameters EITHer POSitive NEGative RST Value POSitive Examples TRIG SEQ2 SLOP VOLT POS TRIG ACQ SLOP VOLT EITH Query Syntax TRIGger SEQuence2 SLOPe VOLTage TRIGger ACQuire SLOPe VOLTage Returned Parameters lt CRD gt Related Commands TRIG SEQ2 SLOP CURR TRIGger SEQuence2 SOURce TRIGger ACQuire SOURce These commands select the trigger source for measurement triggers as follows BUS GPIB device TRG or lt GET gt Group Execute Trigger INTernal trigger is generated internally when the measured waveform crosses the trigger level with the selected slope EXTernal Selects the external trigger input on the 4 pin control connector as the trigger source only applies to units with firmware revision A 03 01 and up Command Syntax TRIGger SEQuence2 SOURce lt source gt TRIGger ACQuire SOURce lt source gt Parameters BUS INTernal RST Value INTernal Examples TRIG ACQ SOUR BUS Query Syntax TRIGger SEQuence2 SOURce TRIGger ACQuire SOURce Returned Parameters lt CRD gt 131 8 Language Dictionary TRIGger SEQuence1 DEFine TRIGger SEQuence2 DEFine These commands define the names that are aliased to trigger sequences 1 and 2 The command accepts only ACQuire for sequence 2 and TRANsient for sequence 1 as predefined names The query allows the user to query the instrument names aliased to sequences 1 and 2 Command Syntax TRIGger SEQuencel DEFine TRANsient
103. SOUR TRIG SEQ2 DEF TRIG SEQ2 COUN TRIG SEQ2 LEV VOLT TRIG SEQ2 SLOP CURR SENS FUNC TRIGger SEQuence2 COUNt CURRent TRIGger ACQuire COUNt CURRent This command sets up a successive number of triggers for measuring current data With this command the trigger system needs to be initialized only once at the start of the acquisition period After each completed measurement the instrument waits for the next valid trigger condition to start another measurement This continues until the count has completed Command Syntax TRIGger SEQuence2 COUNt CURRent lt NRf gt TRIGger ACQuire COUNt CURRent lt NRf gt Parameters 1 to 100 RST Value 1 Examples TRIG SEQ2 COUN CURR5 TRIG ACQ COUN CURR 1 Query Syntax TRIGger SEQuence2 COUNt CURRent TRIGger ACQuire COUNt CURRent Returned Parameters lt NR3 gt Related Commands TRIG SEQ2 TRIG ACQ TRIGger SEQuence2 COUNt DVM TRIGger ACQuire COUNt DVM Agilent 66321D 66319D only This command specifies a DVM trigger count Since the trigger count for DVM measurements cannot be set to any value other than 1 this command does not need to be used It is included for completeness only Command Syntax TRIGger SEQuence2 COUNt DVM lt NRf gt TRIGger ACQuire COUNt D VM lt NRf gt Parameters 1 RST Value 1 Examples JRIG ACQ COUN DVM 1 Query Syntax TRIGger SEQuence2 COUNt DVM TRIGger ACQuire COUNt DVM Returned Parameters lt NR3 gt 126 Language Dictionary 8 TRIGger S
104. Standard Event Status Register bit 3 System error generic Too many errors errors beyond 9 lost due to queue overflow Query Errors 400 through 499 sets Standard Event Status Register bit 2 Query error generic Query INTERRUPTED query followed by DAB or GET before response complete Query UNTERMINATED addressed to talk incomplete programming message received Query DEADLOCKED too many queries in command string Query UNTERMINATED after indefinite response Error Messages C Table C 1 Error Numbers continued Selftest Errors 0 through 99 sets Standard Event Status Register bit 3 No error Non volatile RAM RDO section checksum failed Non volatile RAM CONFIG section checksum failed Non volatile RAM CAL section checksum failed Non volatile RAM STATE section checksum failed Non volatile RST section checksum failed RAM selftest VDAC IDAC selftest 1 VDAC IDAC selftest 2 VDAC IDAC selftest 3 VDAC IDAC selftest 4 OVDAC selftest Digital I O selftest error Device Dependent Errors 100 through 32767 sets Standard Event Status Register bit 3 Ingrd receiver buffer overrun Front panel uart overrun Front panel uart framing Front panel uart parity Front panel buffer overrun Front panel timeout CAL switch prevents calibration CAL password is incorrect CAL not enabled Computed readback cal constants are incorrect Computed programming cal constants are incorrect Incorrect sequence of calibration commands CV
105. The output resistance is controlled with the RESistance command To set the output resistance to 0 5 ohms use RES 0 5 72 Programming the DC Source 7 Triggering Output Changes The dc source has two independent trigger systems One is used for synchronizing output changes and the other is used for synchronizing measurements This section describes the output trigger system The measurement trigger system is described under Triggering Measurements SCPI Triggering Nomenclature In SCPI terms trigger systems are called sequences When more than one trigger system exists they are differentiated by naming them SEQuencel and SEQuence2 SEQuence is the transient trigger system and SEQuence2 is the measurement trigger system The dc source uses aliases with more descriptive names for these sequences These aliases can be used instead of the sequence forms Sequence Form Alias SEQuencel TRANSsient SEQuence2 AC Quire Output Trigger Model Figure 7 1 is a model of the output trigger system The rectangular boxes represent states Arrows show the transitions between states These are labeled with the input or event that causes the transition to occur INITiate CONTinuous OFF IDLE STATE y INITiate IMMediate INITiate CONTinuous ON INITIATED STATE TRIGGER RECEIVED OUTPUT LEVEL CHANGE Figure 7 1 Model of Output Trigger System Setting the Voltage Current or Resistance Transient Levels To pro
106. The power on and RST sample interval and sweep size settings yield a data acquisition time of 32 milliseconds per measurement Ripple rejection is a function of the number of cycles of the ripple frequency contained in the acquisition window More cycles in the acquisition window results in better ripple rejection If you increase the data acquisition time for each measurement to 45 microseconds for example this results in 5 53 cycles in the acquisition window at 60 Hz for a ripple rejection of about 70 dB Controlling Measurement Samples You can vary both the number of data points in a measurement sample as well as the time between samples This is illustrated in Figure 7 2 SENS SWE TINT lt time gt SENS SWE POIN lt of points gt Figure 7 2 Commands that Control Measurement Time 75 7 Programming the DC Source When the instrument is turned on and at RST the output voltage or current sampling rate is 15 6 microseconds and the sweep size is set to 2048 data points This means that it takes about 32 milliseconds to fill up 2048 data points in the data buffer Adding a command processing overhead of about 20 milliseconds results in a total measurement time of about 50 milliseconds per measurement You can vary this data sampling rate with SENS SWE TINT lt sample_period gt SENS SWE POIN lt points gt For example to set the time interval to 46 8 microseconds per measurement with 150
107. USER S GUIDE Agilent Technologies Model 66319B D 66321B D Mobile Communications DC Source Featuring programmable output resistance Refer to page 20 for a brief description of the model differences QPS ee Agilent Technologies Agilent Part No 5964 8184 Microfiche No 5964 8185 Printed in Malaysia May 2003 Warranty Information CERTIFICATION Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Bureau of Standards to the extent allowed by the Bureau s calibration facility and to the calibration facilities of other International Standards Organization members WARRANTY This Agilent Technologies hardware product is warranted against defects in material and workmanship for a period of three years from date of delivery Agilent Technologies software and firmware products which are designated by Agilent Technologies for use with a hardware product and when properly installed on that hardware product are warranted not to fail to execute their programming instructions due to defects in material and workmanship for a period of 90 days from date of delivery During the warranty period Agilent Technologies will at its option either repair or replace products which prove to be defective Agilent does not warrant that the operation for the software firmware
108. Y Cir Entry Number LINE 1 As 0 by Q Figure 5 1 Front Panel Overall View 45 5 Front Panel Operation Display 14 character vacuum fluorescent display for showing output measurements and programmed values Annunciators Annunciators light to indicate operating modes and status conditions CV The dc source output is in constant voltage mode CC The dc source output is in constant current mode Unr The dc source output is in an unregulated state Dis The dc source output is disabled off OCP The overcurrent protection state is enabled Prot One of the dc source s output protection features is activated Cal The dc source is in calibration mode Shift The Shift key is pressed to access an alternate key function Rmt The GPIB interface is in a remote state Addr The interface is addressed to talk or to listen Err There is a message in the SCPI error queue SRQ The interface is requesting service from the controller Rotary Control The rotary control lets you set the output voltage or current as well as menu parameters Press and to select the resolution then adjust the value with the knob Line This turns the dc source on or off System Keys The system keys let you Return to Local mode front panel control Set the dc source GPIB address Selects the remote programming interface Select the output channel on units with more than o
109. abled an event on a selected trigger source causes the specified triggering action to occur If the trigger subsystem is not enabled all triggers are ignored Command Syntax _ INITiate IMMediate SEQuence 1 2 INITiate MMediate NAME lt name gt Parameters TRANsient ACQuire for INIT NAME Examples INIT SEQ2 INIT NAME TRAN Related Commands ABOR INIT CONT TRIG TRIG SEQ DEF TRG 124 Language Dictionary 8 INITiate CONTinuous SEQuence1 INITiate CONTinuous NAME TRANsient These commands control the output transient trigger system 1 or ON continuously initiates the output trigger system 0 or OFF turns off continuous triggering In this state the output trigger system must be initiated for each trigger using INITiate SEQuence Command Syntax _INITiate CONTinuous SEQuencel lt bool gt INITiate CONTinuous NAME TRANsient lt bool gt Parameters 01 11 OFFION Examples INIT CONT SEQI ON _ INIT CONT NAME TRAN 1 Related Commands ABOR INIT TRIG TRIG SEQ DEF TRG TRiIGger This command generates a BUS trigger for the output transient trigger system If the transient trigger system is enabled the trigger will then 1 Initiate a pending level change as specified by CURRent TRIGger or VOLTage TRIGger 2 Clear the WTG bit in the Status Operation Condition register after both transient and acquire trigger sequences have completed WTG is the logical or of both transient and acquire sequences 3 If INITiate CONTinuous ON has
110. al resistance of a battery Negative resistance programming lets you compensate for voltage drops that occur between the remote sense points and the phone terminals Programmable output compensation lets you optimize the transient response for various wire lengths and phone capacitances Figure 2 1 describes the output characteristic of the dc source Agilent 66319B The Agilent 66319B Mobile Communications DC Source includes all of the capabilities of the Agilent 66321B with the addition of a second electrically isolated output Figure 2 2 describes output characteristic of this second output which is primarily used to provide voltage or current for a charger input on the device under test The second output has all of the basic programmable features as the main output with the exception of the waveform measurement capability open sense lead detect capability resistance programming overvoltage protection and low and middle current measurement ranges Agilent 66321D and 66319D The Agilent 66321D and 66319D Mobile Communications DC Sources also contain an auxiliary DVM with input terminals located on the rear panel This provides limited low voltage dc and ac measurement capability which can be used to monitor test point voltages on the unit under test as well as on the test fixture The common mode voltage range is from 4 5 Vdc to 25 Vdc relative to the minus terminal of output 1 The DVM is programmable from the front panel of the instrum
111. amming and measurement 1 A and 0 02A range measurements ac current measurement resistance programming internal DVM eff o Oo o Front Panel Calibration Menu The Entry keypad is used for calibration functions Press this key to access the calibration menu Notes 156 Display CAL ON lt value gt CAL OFF CAL LEV lt char gt CAL DATA lt value gt CAL VOLT CAL VOLT2 CAL RES CAL CURR CAL CURR2 CAL CURR MEAS R3 CAL CURR MEAS LOW CAL CURR MEAS AC CAL DVM CAL SAVE DATE lt char gt CAL PASS lt value gt value a numeric value Command Function Turns calibration mode on when the correct password value is entered Turns calibration mode off Advance to next step in sequence P1 or P2 Enter an external calibration measurement Begin voltage calibration sequence Begin output 2 voltage calibration sequence Begin resistance calibration Begin high range current calibration sequence Begin output 2 current calibration sequence Begin 1A range current measurement calibration Begin 0 02A range current measurement calibration Begin ac current calibration sequence Begin DVM calibration sequence Saves the calibration constants in non volatile memory Displays the calibration date 0 if none is supplied Set new calibration password char a character string parameter Use and Use and Use and to scroll through the menu commands to scroll through the menu parameters to select a digit in a nu
112. and PTR Positive Transition registers These registers serve as polarity filters between the Questionable Enable and Questionable Event registers to cause the following actions When a bit of the Questionable NTR register is set to 1 then a 1 to 0 transition of the corresponding bit of the Questionable Condition register causes that bit in the Questionable Event register to be set When a bit of the Questionable PTR register is set to 1 then a 0 to 1 transition of the corresponding bit in the Questionable Condition register causes that bit in the Questionable Event register to be set Ifthe same bits in both NTR and PTR registers are set to 1 then any transition of that bit at the Questionable Condition register sets the corresponding bit in the Questionable Event register Ifthe same bits in both NTR and PTR registers are set to 0 then no transition of that bit at the Questionable Condition register can set the corresponding bit in the Questionable Event register Command Syntax STATus QUEStionable NTRansition lt NRf gt STATus QUEStionable PTRansition lt NRf gt Parameters 0 to 32767 Preset Value NTR register 0 PTR register 32767 Examples STAT QUES NTR 16 STATUS QUESTIONABLE PTR 512 Query Syntax STAT QUES NTR STAT QUES PTR Returned Parameters lt NR1 gt Register value Related Commands STAT QUES ENAB 122 Language Dictionary 8 System Commands System commands control system functions that a
113. annunciator is on Turn all outputs off 23 24 25 26 27 28 29 In Case of Trouble Procedure Connect a jumper wire across the and terminals of output 2 Press Output On Off Press Current Enter Number lt 1 gt Enter Press Shift OCP Press Shift OCP Press Shift Prot Clear Turn the unit off and remove the shorting wire from the output terminals Display 20 004V 1 520A CURR lt I gt 20 001V 0 0003A 20 001V 0 0003A 20 004V 0 998A Turn On Checkout 4 Explanation Shorts output 2 of the unit The CC annunciator is on indicating that output 2 is in constant current mode Output 2 is sourcing current at its maximum rating which is the default current limit setting Programs the output 2 current to 1 ampere You enabled the overcurrent protection circuit The circuit then tripped because output 2 was operating in constant current mode The CC annunciator turns off and the OCP and Prot annunciators turn on You have disabled the overcurrent protection circuit The OCP annunciator turns off Restores output 2 The Prot annunciator turns off The CC annunciator turns on The next time the unit turns on it will be restored to the RST or factory default state Dc source failure may occur during power on selftest or during operation In either case the display may show an error message that indicates the reason for the failure Selftest Error Messages
114. ansformer sialic eae 66319D 66321D DVM INPUT TO 6 Vac ACC jumper wire ania ene OUTPUT 1 L stray capacitance Typically low voltage with respect to Undefined float voltage with respect to GND due to internal bypass capacitors GND due to capacitive currents Could be tens of volts ac or more Figure 3 8 Measuring Circuits Floating with Respect to the Main Output External Protection and Trigger Input Connections A 4 pin connector and a quick disconnect mating plug are provided on each instrument for accessing the Fault Inhibit functions the measurement Trigger input or the Digital I O functions see Table 3 3 The connector accepts wires sizes from AWG 22 to AWG 12 Disconnect the mating plug to make your wire connections NOTE It is good engineering practice to twist and shield all signal wires to and from the digital connectors If shielded wire is used connect only one end of the shield to chassis ground to prevent ground loops 38 Installation 3 Table 3 3 4 Pin Connector Configurations PN TRIGGER FAULTANHIBIT DIGITAL VO Pp Notused FLT Output Pp 2 Notused LT Common Output fs Trigger Input INH Input Input Output 2 4 Trigger Common When functioning in Fault Inhibit mode the fault FLT output also referred to as the DFI discrete fault indicator signal is an open collector circuit that pulls the positive output low wit
115. apacitance from 0 uF to 12 000 uF LLocal mode however has the slowest transient response see appendix A The HRemote mode output compensation setting provides the fastest transient response performance for phones with input capacitances greater than 5uF Most phones have input capacitances greater than 5 UF However the operation of the dc source may be momentarily unstable with phones that have input capacitances less than 5 uF or if the output sense leads are not connected and you are operating in HRemote mode Use the output sense detect circuit to first determine that the sense and load leads are properly connected to the device under test Then if you are testing phones in HRemote mode and want to determine if the input capacitance of your phone is less than 5 uF perform the following test NOTE Itis important that this test is done with the dc source installed in the test system where it will be used since system stability is also dependent on wiring and the phone impedance 1 Connect the phone to the dc source and place it in standby mode 2 Check the last two digits of the voltage reading on the front panel of the dc source 3 If the last two digits are fluctuating it is an indication that the phone capacitance may be less than 5 uF and the dc source is unstable 4 Place the output compensation of the dc source in LLocal mode If the last two digits of the voltage reading are now stable your phone most likely has an inp
116. ary Table 8 1 Subsystem Commands Syntax continued PROTection LEVel lt n gt STATe lt bool gt VOLTage2 LEVel IMMediate AMPLitude lt n gt TRIGgered AMPLitude lt n gt STATus PRESet OPERation EVENt CONDition ENABle lt n gt NTRansition lt n gt PTRansition lt n gt QUEStionable EVENt CONDition ENABle lt n gt NTRansition lt n gt PTRansition lt n gt SYSTem ERRor LANGuage lt language gt VERSion TRIGger SEQuence 2 ACQuire IMMediate COUNt CURRent lt n gt DVM lt n gt VOLTage lt n gt HYSTeresis CURRent lt n gt DVM lt n gt VOLTage lt n gt LEVel CURRent lt n gt DVM lt n gt VOLTage lt n gt SLOPe CURRent lt slope gt DVM lt slope gt VOLTage lt slope gt SOURCce lt source gt SEQuencel TRANsient IMMediate SOURCce lt source gt SEQuencel DEFine TRANsient SEQuence2 DEFine ACQuire 94 Sets the programmable output voltage limit Enables disables automatic overvoltage protection tracking Sets the output2 voltage level Sets the triggered output2 voltage level Presets all enable and transition registers to power on Returns the value of the event register Returns the value of the condition register Enables specific bits in the Event register Sets the Negative transition filter Sets the Positive transition filter Returns the value of the event register Returns the value of the condition reg
117. ay 2 Setting the output voltage current and compensation 3 Setting the output 2 voltage and current 4 Querying and clearing output protection 5 Making basic front panel measurements 6 Making enhanced front panel measurements 7 Making DVM measurements 8 Programming the digital port 9 Setting the GPIB address 10 Storing and recalling instrument states 1 Using the Front Panel Display Select an output on Agilent 66319B D units Action Display Press Meter to return the display to Meter mode Press Shift Channel to toggle 77 003V_0 004A between channel 1 and channel 2 The left most digit of the front panel display identifies the output channel that is presently being controlled by the front panel It will indicate either a 1 for channel 1 or 2 for channel 2 You can only select an output when the unit is in metering mode Once an output has been selected only the menu commands that apply to that output will appear on the display Output specific menu commands are identified by a 1 or a 2 Also the CV CC and UNR annunciators apply to the selected channel Select the DVM on Agilent 66321D 66319D units Action Display You must select output 1 to use the DVM If output 1 is not selected the DVM s 8 013V 0 003A measurement menu is not displayed On the Function keypad press Meter and press W repeatedly to access the DVM lt reading gt V DC DVM measurement commands DVM measurement commands are identified by the DVM
118. cation 0 Press Enter when done Clear the non volatile memory of the dc source as follows Action On the Function keypad press Output Enter This returns the unit to the factory default settings 2 Save these settings to location 0 Press Save Enter Number 0 Enter 3 Repeat step 2 for memory locations 1 through 3 60 Display SAV 0 Display RCL 0 Display PON STATE RST Display RST SAV 0 SAV 1 SAV 2 SAV 3 Introduction to Programming External References GPIB References The most important GPIB documents are your controller programming manuals BASIC GPIB Command Library for MS DOS etc Refer to these for all non SCPI commands for example Local Lockout The following are two formal documents concerning the GPIB interface ANSIVIEEE Std 488 1 1987 IEEE Standard Digital Interface for Programmable Instrumentation Defines the technical details of the GPIB interface While much of the information is beyond the need of most programmers it can serve to clarify terms used in this guide and in related documents ANSIMEEE Std 488 2 1987 IEEE Standard Codes Formats Protocols and Common Commands Recommended as a reference only if you intend to do fairly sophisticated programming Helpful for finding precise definitions of certain types of SCPI message formats data types or common commands The above two documents are available from the IEEE Institute of Electrical and Electronics E
119. ce which should not exceed the limits in the performance test record card for the appropriate model under Low Resistance Set the load current back to 0 A Then set the output resistance of the dc source to 1 ohm Record the voltage reading on the external DMM V3 and the current reading displayed on the front panel of the dc source I3 Set the load current to 2 8 A Record the voltage reading on the external DMM V4 and the current reading displayed on the front panel of the dc source 14 Calculate the Resistance value as follows Rhigh 14 13 This is the high output resistance which should not exceed the limits in the performance test record card for the appropriate model under High Resistance DVM Tests DVM Measurement Accuracy calibration This test verifies the DVM measurement accuracy Connect all equipment as shown in figure B le a Turn off the dc source and connect the external DMM and the external power supply to the DVM inputs as shown in figure B le Connect only the negative output lead of output 1 to the DVM inputs Then turn on the dc source and select output 1 Set output 1 to zero volts and the external power supply to 25 volts Record the external 3458 DMM reading and the internal DVM reading The difference should be within the positive limits specified for the DVM in Table A 2 152 Performance Calibration and Configuration B d Set output 1 to 15 V and repeat step c e R
120. cels any uncompleted trigger actions the calibration function is disabled by setting CAL STATe to OFF NOTE OUTPut PON STATe is set to RCL 0 Command Syntax Parameters Example Related Commands RST 0111213 RCL 3 PSC RCL lt NRf gt RST SAV The device state stored in location 0 is automatically recalled at power turn on when the This command resets the dc source to a factory defined state as defined in the following table RST also forces an ABORt command CAL STAT DIG DATA DISP STAT DISP MODE DISP TEXT INIT CONT INST COUP OUTP STAT OUTP OUTP COMP OUTP COUP OUTP DFI OUTP DFI SOUR OUTP PROT DEL OUTP PROT STAT OUTP RELay OUTP TYPE SENS CURR RANG SENS CURR DET SENS FUNC SENS SWE OFFS POIN SENS SWE POIN SENS SWE TINT SOUR CURR NOTE Table 8 7 RST Settings OFF 0 ON NORM OFF ALL NONE option 521 units OFF OFF OFF 08 OFF LOW 3A ACDC all but 66321A DC 66321A only VOLT 0 2048 15 6 us 10 of MAX SOUR CURR TRIG SOUR CURR2 SOUR CURR2 TRIG SOUR CURR PROT STAT SOUR LIST COUN SOUR VOLT SOUR VOLT LIM SOUR VOLT TRIG SOUR VOLT2 SOUR VOLT2 LIM SOUR VOLT2 TRIG SOUR VOLT PROT SOUR VOLT PROT STAT TRIG ACQ COUN CURR TRIG ACQ COUN VOLT TRIG ACQ HYST CURR TRIG ACQ HYST DVM TRIG ACQ HYST VOLT TRIG ACQ LEV CURR TRIG ACQ LEV DVM TRIG ACQ LEV VOLT TRIG ACQ SLOP CURR TRIG ACQ SLOP DVM TRIG ACQ SL
121. connect the current monitoring resistor across the dc source output and the DVM across the resistor as in Figure B 1b See Current Monitoring Resistor for connection information b Turn on the dc source and program the output voltage to 5 V and the current to 0 A The dc source s current detector must be set to DC c Divide the voltage drop DVM reading across the current monitoring resistor by its resistance to convert to amps and record this value lout Also record the current reading on the front panel display The readings should be within the limits specified in the performance test record card for the appropriate model under Current Programming and Readback 0 A d Program the output current to the full scale value in Table B 2 e Divide the voltage drop DVM reading across the current monitoring resistor by its resistance to convert to amps and record this value lout Also record the current reading that appears on the front panel display The readings should be within the limits specified in the performance test record card for the appropriate model under Current Programming and Readback Full Scale 148 Performance Calibration and Configuration B 1A Range Current Readback Accuracy performance calibration This test verifies the readback accuracy of the 1 ampere current range a Turn on the dc source and set the current range readback to 1 A Program the output voltage to 5 V and the current to 0 A The
122. d output the and sense terminals and an earth ground terminal The 5 pin connector is removable and accepts wires sizes from AWG 22 to AWG 12 Disconnect the mating plug from the unit by pulling it straight back You must connect the sense terminals on Output 2 for the unit to meet its published specifications Current Ratings Fire Hazard To satisfy safety requirements load wires must be large enough not to overheat when carrying the maximum short circuit current of the de source The following table lists the characteristics of AWG American Wire Gage copper wire Table 3 2 Ampacity and Resistance of Stranded Copper Conductors AWG No Maximum Ampacity in Resistance at 20 deg C free air Q m O ft 0 0843 0 0257 0 0531 0 0162 0 0331 0 0101 28 Installation 3 Voltage Drops and Lead Resistance To optimize the performance and transient response in your test system please observe the following guidelines Twist the load leads together and keep them short The shorter the leads the better the performance When remote sensing twist the sense leads together but do not bundle them in with the load leads For best performance keep the total cable length to the load to 20 ft or less when remote sensing Note that the unit has been tested with cable lengths of up to 40 feet The load wires must also be of a diameter large enough to avoid excessive voltage drops due to the impedance of the wires In genera
123. d Commands MEAS CURR MAX MEASure DVM FETCh DVM Agilent 66321D 66319D only These queries measure dc voltage Query Syntax MEASure SCALar DVM DC FETCh SCALar DVM DC Parameters None Examples MEAS DVM DC FETC DVM DC Returned Parameters lt NR3 gt MEASure DVM ACDC FETCh DVM ACDC Agilent 66321D 66319D only These queries measure ac dc rms voltage Query Syntax MEASure SCALar DVM ACDC FETCh SCALar DVM ACDC Parameters None Examples MEAS DVM ACDC FETC DVM ACDC Returned Parameters lt NR3 gt MEASure VOLTage FETCh VOLTage These queries return the dc output voltage Query Syntax MEASure SCALar VOLTage DC MEASure SCALar VOLTage DC Parameters None Examples MEAS VOLT FETC VOLT DC Returned Parameters lt NR3 gt Related Commands MEAS CURR 104 Language Dictionary 8 MEASure VOLTage2 Agilent 66319B D only This query measures the output voltage at the auxiliary output Output 2 measurements are calculated from a total of 2048 readings taken at a 15 6 microsecond sampling rate These parameters are fixed Query Syntax MEASure SCALar VOLTage2 DC Parameters None Examples MEAS VOLT2 FETC VOLT2 DC Returned Parameters lt NR3 gt Related Commands MEAS CURR2 MEASure VOLTage ACDC FETCh VOLTage ACDC These queries return the act dc rms output voltage Query Syntax MEASure SCALar VOLTage ACDC FETCh SCALar VOLTage ACDC Paramete
124. d into the test program to give the de source time to respond to the test commands Table B 2 Programming and Output Values Agilent Model Full scale Vmax Full Scale Imax Isink OV Voltage Current Max 66321BD_ S 15 535 3 3 0712 2A 3 145 B Performance Calibration and Configuration Constant Voltage CV Tests CV Setup If more than one meter or if a meter and an oscilloscope are used connect each to the terminals by a separate pair of leads to avoid mutual coupling effects For constant voltage dc tests connect only to S and S since the unit regulates the output voltage that appears between S and S and not between the and output terminals Use coaxial cable or shielded two wire cable to avoid noise pickup on the test leads Voltage Programming and Readback Accuracy performance calibration This test verifies that the voltage programming GPIB readback and front panel display functions are within specifications Note that values read back over the GPIB should be identical to those displayed on the front panel a Turn off the dc source and connect a DVM directly across the S and S terminals as shown in Figure B la b Turn on the dc source and program the output to zero volts and the maximum programmable current Imax in Table B 2 with the load off c Record the output voltage readings on the digital voltmeter DVM and the front panel display The readings should be within the limits speci
125. d or identify 66 newline 66 message unit separator 66 minimum measurements 78 model differences 19 monitoring both phases of status transition 89 moving among subsystems 65 177 Index MSS bit 88 multiple triggers 74 83 N negative 131 non volatile memory clearing 60 storing 47 50 numerical data formats 67 O OC 55 OCP 72 open sense protection 32 operation status group 86 option 521 description 23 optional header example 65 options 18 OT 55 output characteristic 21 compensation 53 connections 28 connector 26 control keys 50 current setting 53 54 enable 54 55 rating 21 relays 23 111 resistance 22 53 voltage setting 53 54 output 2 characteristic 22 rating 22 output commands 110 OUTP 110 OUTP COMP 111 OUTP DFI 112 OUTP DFI SOUR 112 OUTP PON STAT 112 OUTP PROT CLE 113 OUTP PROT DEL 113 OUTP REL MODE 111 OUTP RI MODE 113 output compensation 33 50 output queue 88 output trigger system model 73 OV 55 OVERCURRENT 43 overcurrent protection 72 OVERTEMPERATURE 43 OVERVOLTAGE 43 overvoltage protection 35 OVLD 43 56 57 58 OVP circuit 35 disable 35 disabling 35 50 178 PARD 147 151 performance equipment 143 resistance programming 152 setup 144 performance test form 153 performance tests 145 PON power on bit 87 positive 131 post event triggering 84 power cord 26 28 power receptacle 18 power on cond
126. d output has all of the primary programmable features as the main output with the exception of the waveform measurement capability the open sense lead detect capability overvoltage protection and low current range Output Voltage Peak Current capability for up to 1 ms shown by dotted lines Output Current Figure 2 2 Output 2 Characteristic Tables A 1 through A 3 document the specifications and supplemental characteristics of the Agilent dc sources documented in this manual 22 General Information 2 Option 521 Description Agilent 66319B D only Option 521 consists of the following enhancements to the output capabilities of Agilent models 66319B 66319D Solid state relays to connect and disconnect the output of the dc source The relays are available on the output and sense terminals of outputs 1 and 2 When the solid state relays are open the output impedance is effectively raised to about 500k ohms for output 1 and about 200k ohms for output 2 Note that the relays open only in response to an Output OFF command The ability to either Hot switch or Dry switch the solid state relays With Hot switching the relays control the on off characteristics of the voltage at the output terminals With Dry switching the power mesh controls the on off characteristics of the voltage at the output terminals In general Hot switching activates the relays when current is flowing through them Dry switching activates
127. dc source s current detector must be set to DC Divide the voltage drop DVM reading across the current monitoring resistor by its resistance to convert to amps and record this value lout Also record the current reading on the front panel display The difference between the two readings should be within the limits specified in the performance test record card for the appropriate model under 1A Range Current Readback 0 A Program the output current to 1 A Divide the voltage drop DVM reading across the current monitoring resistor by its resistance to convert to amps and record this value lout Also record the current reading on the front panel display The difference between the two readings should be within the limits specified in the performance test record card for the appropriate model under 1A Range Current Readback 1A 0 02A Range Current Readback Accuracy performance calibration This test verifies the readback accuracy of the 20 milliampere current range a Turn off the dc source and connect the output as shown in Figure B 1c using the 400 ohm load resistor Set the DMM to operate in current mode Turn on the dc source and set the current range readback to 0 02A Program the output voltage to zero and the current to the full scale value in Table B 2 The current on the UUT display should be approximately 0 mA Record the current reading on the DMM and the reading on the front panel display The difference between
128. e not the password NOTE Whenever the calibration state is changed from enabled to disabled any new calibration constants are lost unless they have been stored with CALibrate SAVE Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands CALibrate VOLTage CALibrate STATe lt bool gt lt NRf gt 0111 OFF ION lt password gt OFF CAL STAT 1 6812 CALibrate STATe lt NRI gt CAL PASS CAL SAVE CAL STAT OFF RST This command initiates the calibration of the output voltage and the voltage readback circuit Command Syntax Parameters Examples CALibrate VOLTage2 Agilent 66319B D only CALibrate VOLTage DC None CAL VOLT CAL VOLT DC This command initiates the voltage calibration of output 2 Command Syntax CALibrate VOLTage2 Parameters Examples 98 None CAL VOLT2 Display Commands Language Dictionary 8 Display commands control the front panel display of the dc source Annunciators are not affected DISPlay This command turns the front panel display on or off When off the front panel display is blank Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters DISPlay CHANnel Agilent 66319B D only DISPlay WINDow STATe lt bool gt 01 11 OFFI ON ON DISP ON DISPLAY STATE ON DISPlay WINDow STATe lt NRI gt Oorl Selects the output channel that will be displayed on the front panel Whe
129. e average reading program described under CC Load and Line Regulation Short the load switch and record the output current reading The difference in the current readings in steps d and e is the load effect and should not exceed the limit specified in the performance test record card for the appropriate model under CC Load Effect 150 Performance Calibration and Configuration B CC Source Effect performance This test measures the change in output current that results when the AC line voltage changes from the minimum to the maximum value within the specifications Turn off the dc source and connect the ac power line through a variable voltage transformer b Connect the output terminals as shown in Figure B 1b with the DVM connected across the current monitoring resistor Set the transformer to the nominal line voltage c Turn on the dc source and program the current to the full scale value and the output voltage to the maximum programmable value Vmax in Table B 2 d Adjust the load in the CV mode for full scale voltage as indicated on the front panel display Check that the CC annunciator of the UUT is on If it is not adjust the load so that the output voltage drops slightly e Adjust the transformer to the lowest rated line voltage f Record the output current reading DVM reading current monitoring resistor in ohms You may want to use the average reading program described under CC Load and Line Regulation
130. e gt Parameters ALL NONE RST Value ALL NONE for units with Option 521 Examples INST COUP OUTP STAT ALL Query Syntax INSTrument COUPle OUTPut STATe Returned Parameters lt CRD gt OUTPut 1 2 This command enables or disables the dc source output If outputs 1 and 2 are coupled it affects both the main output and output 2 on Agilent 66319B D units If the outputs are not coupled and no output channel is specified the command applies to the main output The state of a disabled output is a condition of zero output voltage and a model dependent minimum source current see RST Command Syntax OUTPut 1I2 STATe lt bool gt Parameters 01 OFF 11ON RST Value 0 Examples OUTP ON Query Syntax OUTPut 1I2 STATe Returned Parameters lt NR1 gt 0 or 1 Related Commands RST RCL SAV INST COUP OUTP STAT 110 Language Dictionary 8 OUTPut 1 2 RELay MODE Agilent 66319B 66319D with Option 521 only Specifies one of the relay modes DD DH HD or HH The output must be turned off before any programmed mode settings take effect Relay settings cannot be coupled they must be set separately for each output Relay modes are stored in non volatile memory and will be restored when the unit is turned on When shipped from the factory the relay mode for both output 1 and output 2 is set to HH Output ON Output OFF DD Dry Dry DH Dry Hot HD Hot Dry HH Hot Hot When the Output ON relay mode is set to Hot the de source does not
131. e idle state Thus it will be necessary to enable the system each time a triggered action is desired To keep the transient trigger system initiated for multiple triggers without having to send an initiate command for each trigger use NIT CONT SEQ1 ON or NIT CONT NAME TRAN ON Selecting the Output Trigger Source The only trigger source for output triggers is a command from the bus Since BUS is the only trigger source the following command is provided for completeness only TRIG SOUR BUS Generating Triggers Single Trigger After you have specified the appropriate trigger source you can generate triggers by sending one of the following commands over the GPIB TRIG IMM TRG an IEEE 488 Group Execute Trigger bus command When the trigger system enters the Output Change state upon receipt of a trigger see figure 7 1 the triggered functions are set to their programmed trigger levels When the triggered actions are completed the trigger system returns to the idle state NOTE The external trigger input port does not support output triggers Multiple Triggers When you have programmed INITiate CONTinuous SEQuencel ON as previously discussed the trigger system does not need to be initiated for each trigger it responds to the next trigger as soon as it is received When each triggered action completes the trigger system returns to the initiated state to wait for the next trigger INITiate
132. e open Positive sense or load lead is open sense open Negative sense or load lead is open sense open Both positive and negative sense or load leads are open sense open Incorrect resistance reading on the sense or load leads This may be caused by an external power source paralleled with the output or in rare instances by the voltage being out of calibration 32 Installation 3 The default setting for the open sense lead protection circuit is disabled or OFF This is because applications that apply an external voltage to the output or that use external disconnect relays may interfere with the operation of the open sense detect circuit If you are using external voltages or relays you can enable the open sense detect at the beginning of the test procedure Make sure that the external voltage is disabled and that any relays are in the closed position Perform the remote sense check by cycling the output off then on Then disable the open sense detect circuit and continue using the unit Local Sensing Local sensing is not recommended for optimal performance You must use the remote sense connections on both the main output output 1 and on output 2 for the unit to operate properly and meet its published specifications If you are not using remote sensing and the open sense protection feature is ON you must jumper the output 1 pin to its sense pin and jumper the output 1 pin to its sense pin Otherwise the unit will go into a
133. e sense relay is open effectively breaking the readback path The voltage readback will be a small negative number Table 2 6 Option 521 Factory Settings Output Coupling None rs A not o Output Sense Protection Sense Protection Output Compensation Output 1 Relay Mode Output 2 Relay Mode 23 Installation Installation and Operation Checklist Check the Output Compensation CL Check that the output compensation of the dc source is appropriate for your application Refer to Output Compensation in this chapter HRemote mode provides the best transient response and can be used with phones having input capacitances from 5uF to 12000uF Note that if the last two digits on the front panel display are fluctuating when the phone is in standby you may want to set the output compensation to a different mode LLocal mode offer the best stability with the lowest bandwidth Check the Phone Connections O If you ARE remote sensing are the and sense leads connected ONLY at the test fixture and within 50 cm of the phone contacts For best performance the distance from sense lead termination to the phone contacts should be as short as possible Refer to Remote Sense Connections in this chapter O If you are NOT remote sensing are the sense jumpers installed in the output connector Ensure that the output connector plug is installed in the unit with its supplied sense jumpers in place Without sense jumpers the uni
134. e status and protection functions ooo NOTE The examples in this chapter show which commands are used to perform a particular function but do not show the commands being used in any particular programming environment Refer to Appendix D for some examples of SCPI commands in a specific programming environment Programming the Output Power on Initialization When the dc source is first turned on it wakes up with the output state set OFF In this state the output voltage is set to 0 The following commands are given implicitly at power on RST CLS STAT PRES SRE 0 ESE O0 RST is a convenient way to program all parameters to a known state Refer to the RST command in chapter 8 to see how each programmable parameter is set by RST Refer to the PSC command in chapter 8 for more information on the power on initialization of the ESE and the SRE registers Enabling the Output To enable the output use the command OUTP ON Note that this command enables both outputs on Agilent 66319B 66319D units Output Voltage The output voltage is controlled with the VOLTage command To set the output voltage to 5 volts use VOLT 5 or VOLT2 5 for models that have a second output 71 7 Programming the DC Source Maximum Voltage The maximum output voltage that can be programmed can be queried with VOLT MAX Overvoltage Protection The dc source will turn off its output if the output voltage exceeds its program
135. e to OFF Calibration Error Messages Errors that can occur during calibration are shown in the following table Table B 3 GPIB Calibration Error Messages Meaning CAL switch prevents calibration contact the factory for details CAL password is incorrect CAL not enabled Computed readback cal constants are incorrect Computed programming cal constants are incorrect Incorrect sequence of calibration commands 160 Performance Calibration and Configuration B Changing the Calibration Password The factory default password is 0 You can change the password when the dc source is in calibration mode which requires you to enter the existing password Proceed as follows Action Display 1 Begin by pressing Shift Cal and scrolling to the CAL ON command CAL ON 0 0 Enter the existing password from Entry keypad and press Enter Press Shift Cal and scroll to the CAL PASS command CAL PASS 0 E Enter the new password from the keypad You can use any number with up to six digits and an optional decimal point If you want the calibration function to operate without requiring any password change the password to 0 zero NOTE If you want the calibration function to operate without requiring any password change the password to 0 zero Calibration Over the GPIB You can calibrate the dc source by using SCPI commands within your controller programming statements Be sure you are familiar with calibration from the front panel before y
136. e triggers are desired Thus it will be necessary to initiate the system each time a triggered measurement is desired NOTE The measurement trigger system cannot be initiated continuously However it can be repeated for a limited number of times as explained under Multiple triggers Selecting the Measurement Trigger Source The trigger system is waiting for a trigger signal in the initiated state Before you generate a trigger you must select a trigger source The following measurement trigger sources can be selected BUS Selects GPIB bus triggers This synchronizes the measurement to the bus trigger command INTernal Selects the signal as the measurement trigger This synchronizes the measurement to the signal condition present at either the main output output1 terminals or the DVM inputs EXTernal Selects the external trigger input as the measurement trigger source This capability only applies to units with firmware revision A 03 01 and up To select GPIB bus triggers use TRIG SEQ2 SOUR BUS or TRIG ACQ SOUR BUS To select internal triggers use TRIG SEQ2 SOUR INT or TRIG ACQ SOUR INT To select external triggers use TRIG SEQ2 SOUR EXT or TRIG ACQ SOUR EXT Selecting the Sensing Function There is only one measurement system in the dc source The measurement system supports voltage measurements at the main output current measurements at the main outpu
137. easure and sense commands Format commands specify the data formatting of all array queries You can specify the data type type length and byte order Measure commands measure the output voltage or current Measurements are performed by digitizing the instantaneous output voltage or current for a specified number of samples storing the results in a buffer and calculating the measured result Two types of measurement commands are available MEASure and FETCh MEASure commands trigger the acquisition of new data before returning the reading Measurement overflows return a reading of 9 91E 37 FETCh commands return a reading computed from previously acquired data If you take a voltage measurement you can fetch only voltage data Use MEASure when the measurement does not need to be synchronized with any other event Use FETCh when it is important that the measurement be synchronized with either a trigger or with a particular part of the output waveform Sense commands control the current measurement range the bandwidth detector of the dc source and the data acquisition sequence FORMat This command selects the data type and the type length for all array queries Supported types are ASCII and REAL When ASCII is selected the response format for these queries is NR3 Numeric Response Data This format is selected at RST The only valid argument for lt length gt is 0 which means that the dc source selects the number of significan
138. easurements A positive current trigger occurs when the current level changes from a value less than the lower hysteresis band limit to a value greater than the upper hysteresis band limit Similarly a negative current trigger occurs when the current level changes from a value greater than the upper hysteresis band limit to a value less than the lower hysteresis band limit Command Syntax TRIGger SEQuence2 LEVel CURRent lt NRf gt TRIGger ACQuire LEVel CURRent lt NRf gt Parameters 0 to MAX see table 8 3 Unit A amperes RST Value 0 Examples TRIG SEQ2 LEV CURR 5 TRIG ACQ LEV CURR MAX TRIG ACQ LEV 2 Query Syntax TRIGger SEQuence2 LEVel CURRent TRIGger ACQuire LEVel CURRent Returned Parameters lt NR3 gt Related Commands TRIG SEQ2 LEV VOLT TRIG SEQ2 HYST CURR TRIGger SEQuence2 LEVel DVM TRIGger ACQuire LEVel DVM Agilent 66321D 66319D only This command sets the trigger level for DVM measurements A positive trigger occurs when the input signal changes from a value less than the lower hysteresis band limit to a value greater than the upper hysteresis band limit Similarly a negative trigger occurs when the input signal changes from a value greater than the upper hysteresis band limit to a value less than the lower hysteresis band limit Command Syntax TRIGger SEQuence2 LEVel DVM lt NRf gt TRIGger ACQuire LEVel DVM lt NRf gt Parameters 0 to MAX see table A 3 Unit V volts RST Value 0 E
139. efaults Use Meter to exit any menu 10nly valid tor Agilent Model 66319B D 20nly valid for Agilent Model 66321D 66319D 15 1 Quick Reference SCPI Programming Commands At a Glance NOTE Some optional commands have been included for clarity Refer to chapter 8 for a complete description of all programming commands ABORt CALibrate CURRent P OS itive MEASure LOWRange R3 AC CURRent2 DATA lt n gt DATE lt date gt DVM 2 LEVel P1 P2 PAS Sword lt n gt RESistance SAVE STATe lt bool gt lt n gt VOLTage DC VOLTage2 1 DISPlay lt bool gt CHANnel lt channel gt 2 MODE NORMal TEXT TEXT lt display_string gt FORMat DATA ASCII REAL length BORDerNORM SWAP INITiate SEQuence 1 2 NAME TRANsient AC Quire CONTinuous SEQuence 1 lt bool gt NAME TRANsient lt bool gt INSTrument COUPling OUTPut STATe NONE ALL MEASure CURRent2 DC 1 VOLTage2 DC 1 MEASure FETCh ARRay CURRent VOLTage CUR Rent DC ACDC HIGH LOW MAX MIN DVM DC 2 ACDC 2 VOLTage DC ACDC HIGH LOW MAX MIN OUTPut 1 2 lt bool gt COMPensation MODE LLOCAL HLOCAL LREMOTE HREMOTE DFI lt bool gt SOURce QUES OPER ESB RQS OFF PON STATe RST RCLO PROTection CLEar DELay lt n gt RELay MODE DD HD DH HH RI MODE LATCH
140. ements Current Pulse Measurement Using BASIC 10 Rev A 00 00 20 OPTION BASE 1 30 DIM Curr_array 100 40 50 ASSIGN Ps TO 705 60 ASSIGN Ld TO 706 80 OUTPUT Ps RST Sets supply to default values 90 OUTPUT Ps OUTP ON Turn on power supply output 100 OUTPUT Ps VOLT 5 Program power supply to 5 volts 110 120 OUTPUT Ld CURR LEVEL 0 Set up electronic load to produce pulses 130 OUTPUT Ld CURR TLEVEL 3 140 150 OUTPUT Ld TRAN FREQ 1000 160 OUTPUT Ld TRAN DCYCLE 10 170 OUTPUT Ld TRAN MODE CONT 180 OUTPUT Ld TRAN STATE ON 190 200 OUTPUT Ps SENS CURR DET ACDC Set meter to ACDC 210 OUTPUT Ps SENS CURR RANG MAX High Current range 220 OUTPUT Ps TRIG ACQ SOUR INT Set to trigger on pulse 230 OUTPUT Ps SENS FUNC CURR Acquire current reading 240 OUTPUT Ps TRIG ACQ LEV CURR 1 Trigger at 0 1 amps 250 OUTPUT Ps TRIG ACQ SLOPE CURR POS Trigger on positive slope 260 OUTPUT Ps TRIG ACQ HYST CURR 05 Set hysteresis of trigger 270 OUTPUT Ps SENS SWE TINT 20E 6 Set sample time interval to 20us 280 OUTPUT Ps SENS SWE POIN 100 Set number of measurement samples in sweep 167 D Example Programs 290 OUTPUT 705 S trigger 300 OUTP 310 PO OCCUL 320 OUTPUT Ps F completes 330 340 ENT 350
141. emote sensing on both Output and Output 2 for the unit to operate properly and meet its published specifications If you are not using output 1 and the open sense protection feature is turned ON you must jumper the output 1 pin to its sense pin and jumper the output 1 pin to its sense pin Otherwise the unit will go into a protected state and disable the output unless open sense protection is turned OFF Testing has verified stable performance with up to 20 inches of lead length between the sense lead termination and the phone connection see figure 3 4 However for optimum performance connect the sense leads as close as possible to the phone under test To minimize inductance connect the sense leads and load leads as separate twisted pairs see figure 3 2 Connect the sense leads carefully so that they do not become open circuited If the sense leads are left unconnected or become open during operation the dc source will not regulate the output voltage See Open Sense Lead Protection 29 3 Installation OUTPUT 1 OUTPUT 2 CONNECTOR Foi ne TWIST PAIR WIRE RESISTANCE Figure 3 2 Remote Sense Connections Connect the remote sense leads only to the remote sense connections at the output connector and at the location on the test fixture where you want to sense the output voltage There must be not be any continuity from the sense leads to earth ground or from the sense leads to the output
142. ence The Front Panel At a Glance 1 A 14 character display shows output measurements and programmed values 2 Annunciators indicate operating modes and status conditions 3 Rotary control sets voltage current and menu parameters Use e and gt to set the resolution then adjust the value with the knob 66319D DUAL OUTPUT Agile t EAA CCP Prot Cal Shift Rmt Addr Err SRQ SYSTEM Error Input FUNCTION ov ENTRY Cir Entry Channel LINE aa S 5 Enter Number Save Prot Cir 5 a Res Cal OCP 7 8 9 0 Backspace a m b 4 Turns the de 5 System keys source on and off return to Local mode select output channel set GPIB address set RS 232 interface display SCPI error codes e save and recall instrument states display firmware revision and serial number eff QO 6 Function keys enable disable the output select metering functions program voltage and current set and clear protection functions k and scroll through the front panel menu commands 7 Entry keys e enter values increment or decrement values v and M select front panel menu parameters e and select a digit in the numeric entry field 11 1 Quick Reference The Rear Panel At a Glance 1 DVM inputs 2 GPIB IEEE 488 3 Used to con
143. ent as well as remotely using SCPI programming commands Common Features Voltage current and resistance control with 12 bit programming resolution on output 1 Q 3 ampere current source capability up to 5 amperes for 7 milliseconds Q Output resistance programming capability from 40 milliohm to 1 ohm Q Four output compensation modes for a variety of wiring configurations Extensive measurement capability on output 1 Q dc voltage and current rms and peak voltage and current Q Q Three range current measurement capability up to approximately 7 0 amperes Q 16 bit measurement resolution 19 2 General Information Q Triggered acquisition of digitized current and voltage waveforms Q External measurement trigger input on units with firmware revision A 03 01 and up Open sense lead protection on output 1 Automatic overvoltage protection tracking Over temperature RI DFI protection features programmable voltage limit and current limit Non volatile state storage and recall with SCPI command language User configurable power on reset settings see Appendix B Table 2 3 Agilent Model Differences eS ee a eee Por Mell ll measurements output 1 ee ie a measurements output De ee Ee eee ee output 1 Auxiliary nipu output2 No_ _No__ a a e a pepe FEFE pio stamimiing output 1 Ey ll io lll dl ae output 1 RS 232 interface 232 interface Seira wo f wo won ss Exte
144. er SEQuence2 SLOPe CURRent lt slope gt TRIGger ACQuire SLOPe CURRent lt slope gt Parameters ElITHer POSitive NEGative RST Value POSitive Examples TRIG SEQ2 SLOP CURR POS TRIG ACQ SLOP CURR EITH Query Syntax TRIGger SEQuence2 SLOPe CURRent TRIGger ACQuire SLOPe CURRent Returned Parameters lt CRD gt Related Commands TRIG SEQ2 SLOP VOLT TRIiGger SEQuence2 SLOPe DVM TRIGger ACQuire SLOPe DVM Agilent 66321D 66319D only This command sets the slope of the DVM input signal POSitive measurement triggering occurs on the rising edge NEGative measurement triggering occurs on the falling edge EITHer measurement triggering occurs on either edge 130 Language Dictionary 8 Command Syntax TRIGger SEQuence2 SLOPe DVM lt slope gt TRIGger ACQuire SLOPe DV M lt slope gt Parameters EITHer POSitive NEGative RST Value POSitive Examples TRIG SEQ2 SLOP DVM POS TRIG ACQ SLOP DVM EITH Query Syntax TRIGger SEQuence2 SLOPe DVM TRIGger ACQuire SLOPe DVM Returned Parameters lt CRD gt Related Commands TRIG SEQ2 LEV DVM TRIGger SEQuence2 SLOPe VOLTage TRIGger ACQuire SLOPe VOLTage This command sets the slope of an internally triggered voltage measurement POSitive triggering occurs on the rising edge NEGative triggering occurs on the falling edge EITHer triggering occurs on either edge Command Syntax TRIGger SEQuence2 SLOPe VOLTage lt slope gt TRIGger ACQuire
145. ert them anywhere in the message VOLTage TRIGgered 17 5 INITialize TRG OUTPut OFF RCL 2 OUTPut ON Using Queries Observe the following precautions with queries Setup the proper number of variables for the returned data Read back all the results of a query before sending another command to the dc source Otherwise a Query Interrupted error will occur and the unreturned data will be lost Types of SCPI Messages There are two types of SCPI messages program and response A program message consists of one or more properly formatted SCPI commands sent from the controller to the dc source The message which may be sent at any time requests the dc source to perform some action A response message consists of data in a specific SCPI format sent from the de source to the controller The dc source sends the message only when commanded by a program message query Figure 6 2 illustrates the SCPI message structure The Message Unit The simplest SCPI command is a single message unit consisting of a command header or keyword followed by a message terminator The message unit may include a parameter after the header The parameter can be numeric or a string ABORt lt NL gt VOLTage 20 lt NL gt 65 6 Introduction to Programming Data __ Message Unit Query T VOLT LEV20 PROT21 CURR lt NL gt Keyword Separator Message Terminator Message Unit Separators Root Spec
146. esponse ee cl Voltage in 20 us 20 mV CONSTANT CURRENT TESTS Current Programming and Readback Low current 0 A Iout 2 33 mA Front Panel Display Readback Tout 0 5mA High Current Full Scale Iout 2 9972 A Front Panel Display Readback Tout 6 5mA 1A Range Current Readback Front Panel Display Readback 0 A Front Panel Display Readback 1 A 20 mA Range Current Readback Front Panel Display Readback 0 A Front Panel Display Readback 20 mA 10mV Vout 5 mV 15 018 V Vout 9 5 mV 6mV 1mvV 2 33 mA Tout 0 5mA 3 0028 A Tout 6 5mA 0 2 mA 1 2mA 2 5 pA 22 5 WA 22 5 WA 5 1mA Current Sink Front Panel Display Readback 20 mA Front Panel Display Readback 3 A CC Load Effect 0 75mA 0 75mA CC Source Effect 0 75mA 0 75mA PARD Current Ripple and Noise RMS OmA 2 0 mA RESISTANCE TESTS Low Resistance Readback 0 ohm 2 mQ 2 mQ High Resistance Readback 1 ohm 0 993 Q 1 007 Q 154 Performance Calibration and Configuration B Test Description Minimum Maximum Specification Specification DVM VOLTAGE CALIBRATION VERIFICATION Positive Voltage Measurement Vmeas 15mV Vmeas 15mV Negative Voltage Measurement Vmeas 6 8mV Vmeas 6 8mV Test Description Minimum Maximum Specification Specification CONSTANT VOLTAGE TESTS Voltage Programming and Readback Output 2 Low Voltage 0 V 40 mV 40 mV Vout2 15 mV 12 064 V Vout2
147. everse the leads of the external power supply to the DVM inputs Keep all other connections the same f With output 1 set to 15 V lower the voltage on the external power supply until the external 3458 DMM reads 4 5 V g Record the external 3458 DMM reading and the internal DVM reading The difference should be within the negative limits specified for the DVM in Table A 2 h Set output 1 to zero volts and repeat step g Performance Test Equipment Form Test Facility Report Number Date Customer Tested By Model Ambient Temperature C Serial No Relative Humidity Options Nominal Line Frequency Firmware Revision Special Notes Test Equipment Used Description Model No Trace No Cal Due Date AC Source DC Voltmeter RMS Voltmeter Oscilloscope Electronic Load Current Shunt 153 B Performance Calibration and Configuration Performance Test Record Form Model Agilent 66321B D Report No Model Agilent 66319B D Output 1 Test Description Minimum Maximum Specification Specification CONSTANT VOLTAGE TESTS Voltage Programming and Readback Low Voltage 0 V Vout 10 mV Front Panel Display Readback Vout 5 mV High Voltage Full Scale Vout 14 982 V Front Panel Display Readback Vout 9 5mV CV Load Effect CV Source Effect PARD Ripple and Noise gaia RMS OmV Transient R
148. ew password is automatically stored in nonvolatile memory and does not have to be stored with CALibrate SAVE If the password is set to 0 password protection is removed and the ability to enter the calibration mode is unrestricted Command Syntax CALibrate PASScode lt NRf gt Parameters lt model number gt default Examples CAL PASS 6812 Related Commands CAL SAV 97 8 Language Dictionary CALibrate RESistance This command calibrates initiates the calibration of the output resistance circuit Command Syntax CALibrate RESistance Parameters None Examples CAL RES CALibrate SAVE This command saves any new calibration constants after a calibration procedure has been completed in nonvolatile memory If CALibrate STATe OFF is programmed without a CALibrate SAVE the previous calibration constants are restored Command Syntax CALibrate SAVE Parameters None Examples CAL SAVE Related Commands CAL PASS CAL STAT CALibrate STATe This command enables and disables calibration mode The calibration mode must be enabled before the dc source will accept any other calibration commands The first parameter specifies the enabled or disabled state The second parameter is the password A password is required if the calibration mode is being enabled and the existing password is not 0 If the password is not entered or is incorrect an error is generated and the calibration mode remains disabled The query statement returns only the stat
149. f Front Panel Programming 6 INTRODUCTION TO PROGRAMMING External References VXIplug amp play Power Products Instrument Drivers GPIB Capabilities of the DC Source Introduction to SCPI Types of SCPI Commands SrArqUMwWhN Types of SCPI Messages 65 SCPI Data Formats 67 SCPI Command Completion 68 Using Device Clear 68 SCPI Conformance Information 69 7 PROGRAMMING THE DC SOURCE 71 Introduction 71 Programming the Output 71 Triggering Output Changes 73 Making Basic Measurements 75 Making Enhanced Measurements 76 Making DVM Measurements 79 Triggered Measurements 80 Programming the Status Registers 84 Inhibit Fault Indicator 89 8 LANGUAGE DICTIONARY 91 Introduction 91 Calibration Commands 96 Display Commands 99 Measurement Commands 100 Output Commands 110 Status Commands 119 System Commands 123 Trigger Commands 124 Common Commands 132 A SPECIFICATIONS 139 Specifications 139 Supplemental Characteristics 140 B PERFORMANCE CALIBRATION AND CONFIGURATION 143 Introduction 143 Equipment Required 143 Measurement Techniques 144 Performance Tests 145 Constant Voltage Tests 146 Constant Current Tests 148 Resistance Tests 152 DVM Tests 152 Performance Test Equipment Form 153 Performance Test Record Form 154 Performing the Calibration Procedure 156 Performing the Configuration Procedure 161 C ERROR MESSAGES 163 Error Number List 163 D EXAMPLE PROGRAMS 167 Pulse Measurements 167 E LINE VOLTAGE CONVERSION 173 Quick Refer
150. f phone 66319D 66321D lead resistance load current OUTPUT 1 past connector lead resistance Minus terminal connector for internal phone V common mode circuits DVM INPUT 4Vdc lt V comon mode lt 25Vdc Figure 3 6 DVM Measurement Example NOTE The DVM is not designed to measure voltages that are greater than 25 Vdc or less than 4 5 Vdc with respect to the negative terminal of the main output The following sections discuss restrictions that apply when using the DVM to measure voltages on circuits that are not powered by the main output or that are floating with respect to the main output Measuring Circuits that are Not Powered by the Main Output To obtain correct voltage measurements keep the common mode voltage within the specified limits Common mode voltage is defined as the voltage between either DVM input terminal and the negative terminal of the main output output 1 The common mode voltage range is from 4 5 Vdc to 25 Vdc Attempting to measure voltages outside this range may result in incorrect readings due to clipping by the internal DVM measurement circuits NOTE Do not confuse the common mode voltage with the DVM voltage readback The DVM voltage readback is a differential measurement from one input lead to the other input lead This quantity may be as high as 25 Vdc depending on the orientation of the input leads 36 Installation 3
151. fied in the performance test record card for the appropriate model under Voltage Programming and Readback 0 Volts Also note that the CV annunciator is on The output current reading should be approximately zero d Program the output voltage to full scale see Table B 2 e Record the output voltage readings on the DVM and the front panel display The readings should be within the limits specified in the performance test record card for the appropriate model under Voltage Programming and Readback Full Scale CV Load Effect performance This test measures the change in output voltage resulting from a change in output current from full load to no load a Turn off the dc source and connect a DVM directly across the S and S terminals as shown in Figure B 1a b Turn on the dc source and program the current to the maximum programmable value Imax and the voltage to the full scale value in Table B 2 c Adjust the load for the full scale current in Table B 2 as indicated on the front panel display The CV annunciator on the front panel must be on If it is not adjust the load so that the output current drops slightly d Record the output voltage reading on the DVM connected to S and S e Open the load and again record the DVM voltage reading The difference between the DVM readings in steps d and e is the load effect voltage and should not exceed the value listed in the performance test record card for the appropriate model
152. following functions calibration display Presentation measurement output status system trigger and common commands Both the subsystem commands and the common commands that follow are arranged in alphabetical order under each heading Subsystem Commands Subsystem commands are specific to functions They can be a single command or a group of commands The groups are comprised of commands that extend one or more levels below the root The subsystem command groups are arranged according to function Calibration Display Measurement Output Status System and Trigger Commands under each function are grouped alphabetically Commands followed by a question mark take only the query form When commands take both the command and query form this is noted in the syntax descriptions Table 8 1 lists all of the subsystem commands in alphabetical order 91 8 Language Dictionary Table 8 1 Subsystem Commands Syntax ABORt CALibrate CURRent SOURce DC POSitive MEASure DC R3 LOWRange AC CURRent2 DATE lt date gt DVM LEVel lt level gt PASSword lt n gt RESistance SAVE STATE lt bool gt lt n gt VOLTage DC VOLTage2 DISPlay WINDow STATe lt bool gt CHANnel lt n gt MODE lt mode gt TEXT DATA lt string gt FORMat DATA lt type gt BORDer lt type gt INITiate IMMediate SEQuence lt n gt NAME lt name gt CONTinuous SEQuencel lt bool gt NAME TR
153. ft Cal scroll to CAL RES and press Enter Press Shift Cal scroll to CAL LEV and press Enter to select the first calibration point Press Shift Cal and scroll to CAL DATA Wait for the DMM reading to stabilize Press Enter Number and enter the first current value in amperes Press Enter Press Shift Cal scroll to CAL LEV use to scroll to P2 the second calibration point and press Enter Press Shift Cal and scroll to CAL DATA Wait for the DMM reading to stabilize Press Enter Number and enter the first current value in amperes Press Enter Turn off and disconnect the electronic load Then press Shift Cal scroll to CAL LEV use to scroll to P3 the third calibration point and press Enter Press Shift Cal and scroll to CAL DATA Wait for the DMM reading to stabilize Press Enter Number and enter the first current value in amperes Press Enter Display CAL CURR MEAS AC Display CAL CURR2 CAL LEV P1 CAL DATA 0 00 CAL LEV P2 CAL DATA 0 00 Display CAL RES CAL LEV P1 CAL DATA 0 00 CAL LEV P2 CAL DATA 0 00 CAL LEV P3 CAL DATA 0 00 159 B Performance Calibration and Configuration Agilent 66321D 66319D DVM Calibration Action Display 51 Connect the DVM inputs directly to output 1 Connect the external DMM to the DVM inputs as shown in figure B le Do not connect the Agilent 3478 DMM 52 Press Shift Cal scroll to CAL DVM and press Enter CAL DVM 53 Press Shift Cal scroll to CAL LEV and
154. g resistor across the input of the DMM as previously shown in figure B 1b Set the DMM to operate in voltage mode 149 B Performance Calibration and Configuration f Turn on the dc source and set the current range readback to 3A Program the output voltage to zero and the current to full scale as in Table B 2 Record the current reading on the front panel display Divide the voltage drop DVM reading across the current monitoring resistor by its resistance to convert to amperes and record this value The difference between the two current readings should be within the limits specified in the performance test record card under 3A Range Current Readback Accuracy 3A CC Load and Line Regulation performance The following CC Load Effect and CC Source Effect tests verify the dc regulation of the output current To insure that the values read are not the instantaneous measurement of the ac peaks of the output current ripple several dc measurements should be made and the average of these readings calculated An example of how to do this is given below using an Agilent 3458A System Voltmeter programmed from the front panel Set up the voltmeter and execute the Average Reading program follows e f Program 10 power line cycles per sample by pressing NPLC 1 0 ENTER Program 100 samples per trigger by pressing N Rdgs Trig 1 0 0 ENTER Set up voltmeter to take measurements in the statistical mode as follows Press Shift key f
155. gram output trigger levels you must first specify a voltage or current trigger level that the output will go to once a trigger signal is received Use the following commands to set the output trigger level VOLT TRIG lt n gt VOLT2 TRIG lt n gt for models that have a second output CURR TRIG lt n gt CURR2 TRIG lt n gt for models that have a second output RES TRIG lt n gt only applies to output 1 the main output NOTE Until they are programmed trigger levels will be the same as the corresponding voltage or current levels For example if a dc source is powered up and the voltage is programmed to 6 the trigger level is also set to 6 Once you program a trigger level it will stay at that value until the output is changed by a transient trigger or reprogrammed 73 7 Programming the DC Source Enabling the Output Trigger System When the dc source is turned on the trigger subsystem is in the idle state In this state the trigger subsystem is disabled ignoring all triggers Sending the following commands at any time returns the trigger system to the idle state ABOR RST RCL The INITiate commands move the trigger system from the idle state to the initiated state This enables the dc source to receive triggers To initiate for a single triggered action use NIT SEQ or NIT NAME TRAN After a trigger is received and the action completes the trigger system will return to th
156. gt SYST VERS 123 8 Language Dictionary Trigger Commands Trigger commands consist of trigger and initiate commands They are used to generate output transients and measurement triggers Initiate commands initialize the trigger system Trigger commands control the remote triggering of the dc source Trigger commands and Initate commands are referenced either by name or by number The correspondence between names and numbers is Sequence Number Sequence Name Description 1 the default TRANSsient Output transient trigger sequence 2 ACQuire Measurement acquire trigger sequence NOTE Before you generate a measurement trigger you must specify either a voltage current or DVM measurement acquisition using the SENSe FUNCtion command ABORt This command cancels any trigger actions presently in process Pending trigger levels are reset to their corresponding immediate values ABORt also resets the WTG bit in the Operation Condition Status register see chapter 7 about programming the status registers If INITiate CONTinuous ON has been programmed the trigger subsystem initiates itself immediately after ABORt thereby setting WTG ABORt is executed at power turn on and upon execution of RCL or RST Command Syntax ABORt Parameters None Examples ABOR Related Commands INIT RST TRG TRIG INITiate SEQuence INITiate NAME INITiate commands control the enabling of both output and measurement triggers When a trigger is en
157. h frequency contents greater than several kilohertz DC Select DC only if you are making dc current measurements and you require a dc measurement offset accuracy better than 2mA on the High current measurement range When DC is selected the component of output current that is supplied by the instrument s output filter is not sensed Note that this selection gives inaccurate results on current waveforms with frequency contents greater than several kilohertz NOTE This command only applies to the High current measurement range Command Syntax SENSe CURRent DETector lt detector gt Parameters ACDC or DC RST Value ACDC Examples SENS CURR DET ACDC SENS CURR DET DC Query Syntax SENSe CURRent DETector Returned Parameters lt CRD gt SENSe CURRent RANGe This command selects the dc current measurement range 3A Range 0 through MAX see table A 2 1A Range O through 1 A 0 02A Range 0 through 0 02 A The 3A range covers the full current measurement capability of the instrument The 1A range measures currents up to a maximum of 1 A This increases the mid range current measurement sensitivity for greater accuracy and resolution The 0 02A range measures currents up to a maximum of 20 mA This increases the current measurement sensitivity for the best accuracy and resolution at the lowest range The value that you program with SENSe CURRent RANGe must be the maximum current that you expect to measure The instrument will select the
158. h respect to the negative chassis referenced common The high impedance inhibit INH input also referred to as the RI remote inhibit signal is used to shut down the dc source output whenever the INH is pulled low with respect to the INH chassis referenced common Figure 3 9 shows how you can connect the FLT INH and trigger input circuits of the dc source In example A the INH input connects to a switch that shorts the Inhibit pin to common whenever it is necessary to disable output of the unit This activates the remote inhibit RI circuit which turns off the dc output The front panel Prot annunciator comes on and the RI bit is set in the Questionable Status Event register To re enable the unit first open the connection between pins INH and common and then clear the protection circuit This can be done either from the front panel or over the GPIB In example B the FLT output of one unit is connected to the INH input of another unit A fault condition in one of the units will disable all of them without intervention either by the controller or external circuitry The computer can be notified of the fault via a service request SRQ generated by the Questionable Status summary bit Note that the FLT output can also be used to drive an external relay circuit or signal other devices whenever a user definable fault occurs A INH Example with One Unit B FLT Example with Multiple Units NOTE Connectors are removable Switch N
159. he GPIB card manufacturer s directions for card installation and software driver setup GPIB Interface Each dc source has its own GPIB bus address which can be set using the front panel Address key as described in chapter 5 GPIB address data is stored in non volatile memory The dc source is shipped with its GPIB address set to 5 Dc sources may be connected to the GPIB interface in series configuration star configuration or a combination of the two provided the following rules are observed The total number of devices including the GPIB interface card is no more than 15 The total length of all cables used is no more than 2 meters times the number of devices connected together up to a maximum of 20 meters Refer to table 2 2 for a list of available GPIB cables Do not stack more than three connector blocks together on any GPIB connector Make sure all connectors are fully seated and the lock screws are firmly finger tightened 40 Turn On Checkout Checkout Procedure Successful tests in this chapter provide a high degree of confidence that your unit is operating properly For performance tests see appendix B NOTE To perform the checkout procedure you will need a wire for shorting the output terminals together The following procedure assumes that the unit turns on in the factory default state If you need more information about the factory default state refer to the RST command in chapter 8 Note that the value
160. he de source and program the output current to the maximum programmable value Imax and the voltage to the full scale value in Table B 2 147 B Performance Calibration and Configuration c Set the load to the Constant Current mode and program the load current to 1 2 the dc source full scale rated current d Set the electronic load s transient generator frequency to 100 Hz and its duty cycle to 50 e Program the load s transient current level to the dc source s full scale current value and turn the transient generator on f Adjust the oscilloscope for a waveform similar to that in Figure B 2 g The output voltage should return to within the specified voltage in less than 20 microseconds following a 0 1A to 1 5A load change in the H remote compensation range Check both loading and unloading transients by triggering on the positive and negative slope Record the voltage at time t in the performance test record card under CV Transient Response Loading Transient v E PEGS 1 Ree ee die Unloading Transient Figure B 2 Transient Waveform Constant Current CC Tests CC Setup Follow the general setup instructions in the Measurement Techniques paragraph and the specific instructions given in the following paragraphs Current Programming and Readback Accuracy performance calibration This test verifies that the current programming and 3A range readback are within specification a Turn off the dc source and
161. he programmable voltage limit output 1 shown Press this key to access the current menu Display CURR lt value gt CURR lt value gt Command Function Sets the current of output 1 the main output of all models Sets the current of output 2 Press this key to access the resistance menu Display RES lt value gt Command Function Sets the resistance of output 1 the main output of all models Press this key to access the output menu list Display RST COUPLING lt char gt COMP lt char gt PON STATE lt char gt PROT DLY lt value gt RI lt char gt DFI lt char gt DFI SOUR lt char gt PORT lt char gt DIGIO lt char gt SENSE PROT lt char gt REL MODE lt char gt Command Function Places the dc source in the factory default state Couples or decouples output 1 and output 2 NONE ALL Sets output compensation HREMOTE LREMOTE HLOCAL LLOCAL Select the power on state command RST RCLO Sets the output protection delay in seconds Sets the remote inhibit mode LATCHING LIVE OFF Sets the discrete fault indicator state ON OFF Selects the DFI source QUES OPER ESB RQS OFF Sets the output port functions RIDFI DIGIO TRIGGER Sets and reads the I O port value 0 through 7 Enables or disables the open sense lead detect circuit ON OFF Sets the relay mode for option 521units DD HD DH or HH applies to both outputs output 1 shown Press this key to display
162. iate AMPLitude lt NR3 gt Command Syntax Parameters Default Suffix RST Value Examples Query Syntax Returned Parameters SOURce CURRent PROTection STATe This command enables or disables the overcurrent protection OCP function on all output channels If the dc source overcurrent protection function is enabled and the dc source goes into constant current operation then the output is disabled and the Questionable Condition status register OC bit is set see chapter 7 about programming the status registers Note that the SOURce CURRent command sets the current limit which determines when the dc source goes into constant current operation An overcurrent condition can be cleared with the OUTPut PROTection CLEar command after the cause of the condition is removed NOTE Use OUTPut PROTection DELay to prevent momentary current limit conditions caused by programmed output changes from tripping the overcurrent protection Command Syntax SOURce CURRent PROTection STATe lt bool gt Parameters 01 11OFF ON RST Value OFF Examples CURR PROT STAT 0 current protection off CURR PROT STAT 1 current protection on Query Syntax Syntax SOURce CURRent PROTection STATe Returned Parameters lt NR1 gt 0 or 1 Related Commands OUTP PROT CLE RST 114 Language Dictionary 8 SOURce CURRent TRIGger This command sets the pending triggered current level of the dc source The pending triggered level is a sto
163. ic and random deviations PARD in the output ripple and noise combine to produce a residual ac voltage superimposed on the dc output voltage CV PARD is specified as the rms or peak to peak output voltage in the frequency range specified in Appendix A a Turn off the dc source and connect the output as shown in Figure B 1a to an oscilloscope ac coupled between the and the terminals Set the scope s bandwidth limit to 20 MHz and use an RF tip on the scope probe Turn on the de source and program the current to the maximum programmable value Imax and the output voltage to the full scale value in Table B 2 Adjust the load for the full scale current value in Table B 2 as indicated on the front panel display Note that the waveform on the oscilloscope should not exceed the peak to peak limits in the performance test record card for the appropriate model under CV Noise PARD Disconnect the oscilloscope and connect an ac rms voltmeter in its place The rms voltage reading should not exceed the RMS limits in the performance test record card for the appropriate model under CV Noise PARD Transient Recovery Time performance This test measures the time for the output voltage to recover to within the specified value following a 50 change in the load current a Turn off the dc source and connect the output as in Figure B 1a with the oscilloscope across the S and S terminals Remember to connect the RC network Turn on t
164. ications of the dc source Unless otherwise noted specifications are warranted over the ambient temperature range of 0 to 55 C Specifications apply with typical cellular phone capacitive loads from OF to 12 000uF Sensing is at the rear terminals of the power supply after a 30 minute warm up period Sense terminals are externally jumpered to their respective output terminals Table A 1 Performance Specifications Parameter Output Ratings Programming Accuracy 25 C 5 C DC Measurement Accuracy via GPIB or front panel meters with respect to actual output 25 C 5 C Ripple and Noise in the range of 20 Hz to 20 MHz with outputs ungrounded or with either terminal grounded Load Regulation change in output voltage or current for any load change within ratings Line Regulation change in output voltage or current for any line change within ratings Transient Response Time for the output voltage to recover to within 20 mV of its final value Voltage Current Peak Current Voltage Current Resistance Voltage Output 2 Current 3 A Current range 3 Ato 5 A 1 A Current range LAto IA 0 02A Current range 20 mA to 20 mA Voltage rms p p Current rms Voltage Current Voltage Current Agilent 66321B D Agilent 66319B D 0 05 10 mV 0 05 1 33 mA 0 5 2mQ 0 03 5 mV NA 0 2 0 5 mA 0 1 0 2 mA 0 1 2 5 WA 1 mV 6 mv 2mA 5mvV 0
165. ifier Figure 6 2 Command Message Structure Headers Headers also referred to as keywords are instructions recognized by the dc source Headers may be either in the long form or the short form In the long form the header is completely spelled out such as VOLTAGE STATUS and DELAY In the short form the header has only the first three or four letters such as VOLT STAT and DEL Query Indicator Following a header with a question mark turns it into a query VOLTage VOLTage PROTection If a query contains a parameter place the query indicator at the end of the last header VOLTage PROTection MAX Message Unit Separator When two or more message units are combined into a compound message separate the units with a semicolon STATus OPERation QUEStionable Root Specifier When it precedes the first header of a message unit the colon becomes the root specifier It tells the command parser that this is the root or the top node of the command tree Message Terminator A terminator informs SCPI that it has reached the end of a message Three permitted messages terminators are e newline lt NL gt which is ASCII decimal 10 or hex OA end or identify lt END gt both of the above lt NL gt lt END gt In the examples of this guide there is an assumed message terminator at the end of each message 66 Introduction to Programming 6 SCPI Data Formats All data programmed to or returned from
166. in and scroll through the menu The DFI command lets DFI ON you enable the Discrete Fault Indicator Use the v key and select ON to enable the FLT output Then press Enter With the FLT output enabled the open collector logic signal can be used to signal external devices when a fault condition is detected 5 Scroll to the DFI SOUR command to select the internal source that drives this signal DFI SOUR RQS Use the key to select from the RQS or ESB bits or the Operation or Questionable DFI SOUR ESB status registers Then press Enter Status summary bits are explained in chapter 7 DFI SOUR OPER DFI SOUR QUES To configure the DIGIO mode of the port proceed as follows Action Display 1 On the Function keypad press Output RST 2 Scroll through the Output menu by pressing V The PORT command lets you select PORT DIGIO the DIGIO function Press Enter when done 3 Scroll to the DIGIO command to set and read the Digital Input Output Port Press DIGIO 5 Enter Number and enter a number from 0 to 7 to program the three bits 0 programs all bits low 7 programs all bits high Press Enter when done To configure the TRIGGER mode of the port proceed as follows Action Display 1 On the Function keypad press Output RST 2 Scroll through the Output menu by pressing V The PORT command lets you select PORT TRIGGER the TRIGGER function Press Enter when done 9 Setting the GPIB Address Your dc source is shipped with the GPIB address set to
167. ing LIVE OFF 10nly valid for Agilent 66319B D 2Only valid for 66321D 66319D 16 SENSe CURRent RANGe lt n gt DETector ACDC DC FUNCtion VOLT CURR DVM LEAD STATus PROTection STATe lt bool gt SWEep OFFSet POINts lt n gt POINts lt n gt TINTerval lt n gt WINDow TYPE HANN RECT SOURce CURRent lt n gt TRIG gered lt n gt PROTection STATe lt bool gt CURRent2 lt n gt TRIGgered lt n gt 1 DIGital DATA lt n gt FUNCtion RIDF DIG TRIG RESistance lt n gt TRIGgered lt n gt VOLTage lt n gt TRIGgered lt n gt PROTection lt n gt STATe lt bool gt VOLTage2 lt n gt TRIG gered lt n gt 1 STATus PRESet OP ERation EVENt CONDition ENABIe lt n gt NTRansition lt n gt PTRansition lt n gt QUEStionable EVENt CONDition ENABIe lt n gt NTRansition lt n gt PTRansition lt n gt SYSTem ERROor LANGuage SCPI VERSion TRIGger SEQuence2 AC Quire IMMediate COUNt CURRent lt n gt DVM lt n gt VOLTage lt gt HY STeresis CURRent lt n gt DVM lt n gt 2 VOLTage lt n gt LEVel CURRent lt n gt DVM lt n gt 2 VOLTage lt gt SLOPe CURRent POS NEG EITH DVM POS NEG EITH 2 VOLTage POS NEG EITH SOURce BUS INT EXT SEQuencel TRANsient IMM ediate SOURce BUS SEQuencel DEFine TRANsient SEQuence2
168. input or an output It normally serves as an output Bit 2 must be programmed high to use pin 3 as an input Pin 4 is the digital ground Refer to the following chart for list of the programmable pin settings The query returns the last programmed value in bits 0 and 1 and the value read at pin 3 in bit 2 Pin Setting Hi Lo GND Input Hi Hi 115 8 Language Dictionary Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters SOURce DIGital FUN SOURce DIGital DATA V ALue lt NRf gt 0 to7 0 DIG DATA 7 SOURce DIGital DATA lt NRI gt Ction Configures the 4 pin control port The configuration setting is saved in non volatile memory RIDFi DIGio TRIGger Configures the port for Remote Inhibit Discrete Fault Interrupt operation Configures the port for Digital input output operation see DIG DATA Configures the port to accept external measurement triggers only applies to units with firmware revision A 03 01 and up Command Syntax Parameters Examples Query Syntax Returned Parameters CAUTION SOURce DIGital FUNCtion lt CRD gt RIDFi DIGio TRIGger DIG FUNC DIG SOURce DIGital FUNC lt CRD gt This command causes a write cycle to nonvolatile memory Nonvolatile memory has a finite maximum number of write cycles Programs that repeatedly cause write cycles to nonvolatile memory can eventually exceed the maximum number of write cycles a
169. is shown in the following figure The main output of the dc source may be adjusted to any value within the boundaries shown Peak Current capability for up to 7 ms shown by dotted lines Output Current Figure 2 1 Dc Source Output 1 Characteristic The dc source is capable of providing a constant dc output of 15 volts with up to 3 amperes of current It is capable of sourcing peak currents of up to 5 amperes provided the peak current pulse does not exceed 7 milliseconds and the average current requirement does not exceed 3 amperes If the unit attempts to draw current for longer than 7 milliseconds the current limit amplifier will limit the current to a maximum of 3 0712 amps The peak current capability is illustrated by the dotted line in Figure 2 1 NOTE To source up to 5 amperes of current for up to 7 milliseconds the current limit must be programmed for greater than 3 amperes up to a maximum of 3 0712 A The dc source can operate in either constant voltage CV or constant current CC over the rated output voltage and current Although the dc source can operate in either mode it is designed as a constant voltage source This means that the unit turns on in constant voltage mode with the output voltage rising to its Vset value There is no command for constant current operation The only way to turn the unit on in constant current mode is by placing a short across the output and then enabling or turning the output on N
170. ister Enables specific bits in the Event register Sets the Negative transition filter Sets the Positive transition filter Returns the error number and error string Sets the programming language SCPI Returns the SCPI version number Triggers the measurement immediately Sets the number of sweeps per current measurement Sets the number of sweeps per DVM measurement Sets the number of sweeps per voltage measurement Qualifies the trigger when measuring current Qualifies the trigger when making DVM measurements Qualifies the trigger when measuring voltage Sets the trigger level for measuring current Sets the trigger level when making DVM measurements Sets the trigger level for measuring voltage Sets the triggered current slope POS NEG EITH Sets the triggered DVM measurement slope POS NEG EITH Sets the triggered voltage slope POS NEG EITH Sets the trigger source BUS INT TRIG Triggers the output immediately Sets the trigger source BUS Sets or queries the SEQ1 name Sets or queries the SEQ2 name Language Dictionary 8 Common Commands Common commands begin with an and consist of three letters command or three letters and a query They are defined by the IEEE 488 2 standard to perform common interface functions Common commands and queries are categorized under System Status or Trigger functions and are listed at the end of the chapter The dc source responds to the following common commands
171. ital Interface for Programmable Instrumentation The Operation Status and Questionable Status registers implement functions that are specific to the dc source 84 Programming the DC Source 7 Power On Conditions Refer to the RST command description in chapter 8 for the power on conditions of the status registers QUESTIONABLE STATUS CONDITION PTR NTR EVENT ENABLE LOGICAL OR OUTPut DFI SOURce SERVICE REQUEST STATUS BYTE ENABLE STANDARD EVENT STATUS OUTPUT QUEUE _ _ _ _ __ EVENT ENABLE LOGICAL OR LOGICAL OR OPERATION STATUS CONDITION PTR NTR EVENT ENABLE SERVICE REQUEST GENERATION LOGICAL OR FIG4 6 GAL Figure 7 8 DC Source Status Model 85 7 Programming the DC Source Table 7 1 Bit Configurations of Status Registers Operation Status Group The dc source is computing new calibration constants The dc source is waiting for a trigger The dc source is in constant voltage mode Output 2 is operating in constant voltage mode The dc source is in constant current mode The dc source is in negative constant current mode Output 2 is operating in constant current mode Questionable Status Group The overvoltage protection has tripped The overcurrent protection has tripped A f
172. itions 85 power on defaults 161 power on initialization 71 pre event triggering 84 print date 7 program examples 167 programming 145 programming and output values 145 programming parameters 95 programming status registers 84 programming the output 71 protection FS 55 OC 55 OT 55 OV 55 RI 55 pulse measurement example 167 169 pulse measurement queries 78 Q queries 65 query indicator 66 query protection 55 questionable status group 87 R rack mount kit 18 rack mounting 27 readback accuracy 146 rear panel at a glance 12 connections 38 40 recalling operating states 60 Rectangular 76 109 relay mode 23 remote front panel 18 REMOTE INHIBIT 43 89 remote programming 20 remote sensing load regulation 31 stability 32 with external relays 30 with test fixture 31 repacking 26 resistance 72 negative 31 sense leads 32 resistance programming 22 returning voltage or current data 79 RI 55 89 signal 38 RIDFI 59 rms measurements 77 79 root specifier 66 RQS bit 88 RS 232 59 S safety class 18 safety warning 18 saving operating states 60 SCPI command completion 68 command syntax 91 command tree 64 common commands 64 conformance 69 data format 67 device clear 68 header path 64 message structure 65 message types 65 message unit 65 multiple commands 64 non conformance 69 program message 65 references 61 response message
173. itive output lead Add 3 mV to the load regulation for each 1 V change in the negative output lead gt To settle within 12 mV of the final value for Output 1 When output 2 is turned off or disabled the output voltage reduces from 12 V to less than 2 V in under 200 us 140 Specifications A Table A 2 Supplemental Characteristics continued Agilent 66321B D Agilent 66319B D output 1 onl 30mV w 6uF load cap 25mV w 20uF load cap 40mV w 6uF load cap 30mV w 20uF load cap 1 4096 points NA 15 6us 31200s Parameter Agilent 66319B D output 2 only With short load leads lt 1 meter Typical Transient Voltage Undershoot Values actual values are dependent on the With long load leads test setup up to 6 meters Dynamic Measurement System Buffer Length Sample Rate Range Measurement Time includes 30 ms acquisition time and 20 ms processing overhead voltage or current 50 ms average Command Processing Time time for output to begin to change 4 ms average following receipt of digital data Savable Instrument States tC 4 in locations 0 to 3 GPIB Interface Capabilities SCPI AH1 C0 DC1 DT1 E1 L4 PPO RL1 SH1 SR1 T6 Language Interface FLT Output Characteristics INH Trigger Characteristics Maximum ratings 16 5 Vdc between terminals 1 and 2 3 and 4 and from terminals or 2 to chassis ground FLT Output Terminals Low level output current 1 25 mA max L
174. l if the wires are heavy enough to carry the maximum short circuit current without overheating excessive voltage drops will not be a problem The maximum allowable value of load lead resistance is 4 ohms total 2 ohms per side This may be further limited to a lower value based on peak current loading by the maximum allowable dc voltage drop of 8 volts total 4 volts per side as specified for remote sense operation To illustrate for up to 3 amps peak the maximum allowable resistance is 2 67 ohms total resulting in a maximum voltage drop of up to 8 volts For 5 amps peak the maximum allowable resistance is 1 6 ohms total again resulting in a maximum allowable voltage drop of up to 8 volts In addition to keeping dc resistance low you also need to minimize the total impedance For higher slew rate currents 0 2 amps us and long wiring lengths 10 to 20 ft the inductance can have as much effect as the resistance To minimize inductance twist the load leads The inductance will be on the order of 0 25 WH ft if twisted and 0 4 WH ft if untwisted In addition to lowering the inductance twisting the leads will reduce noise pick up If you are using remote sense leads connect these as a second twisted pair Do not twist or bundle them with the load leads NOTE The use of relays between the de source and the phone also increases impedance Low resistance relays will improve system performance Remote Sense Connections NOTE You must use r
175. letion 68 command summary 175 Index format 100 border 100 common command syntax 95 common commands 119 123 CLS 132 ESE 132 ESR 133 IDN 133 OPC 133 OPT 134 PSC 134 RCL 135 RST 135 SAV 136 SRE 136 STB 136 TRG 137 TST 137 WAT 137 common mode voltage 36 compensation 33 configuration procedure 161 constant current tests 148 constant voltage tests 146 controller connections 40 conventions used in this guide 63 conversion ac line 173 CRD 67 crowbar circuit 35 current 72 maximum 72 measurement range 77 current measurement detector 107 current measurement range 56 57 58 107 current monitoring resistor 145 current programming 148 current range 49 56 57 58 current readback 149 current sink 149 current sinking 21 CV load effect 146 CV mode 21 53 54 CV Noise 147 CV source effect 147 D damage 26 DC 107 DC current detector 56 57 58 description 19 determining cause of interrupt 88 device clear 68 DFI 90 DFI signal 38 DIGIO 59 digital connector 26 38 digital I O 38 connections 39 digital I O port 90 digital output port 59 dimensions 27 disabling multiple units 39 176 discrete fault indicator 90 display commands 99 123 DISP 99 DISP CHAN 99 DISP MODE 99 DISP TEXT 99 downprogramming 21 dry switch 23 111 DVM common mode voltage 36 connections 36 38 floating voltage measurement 3
176. ll scale rating with the CC annunciator on e Divide the reading on the rms voltmeter by the current monitor resistance to obtain rms current It should not exceed the values listed in the performance test record card under CC Noise RMS 151 B Performance Calibration and Configuration Resistance Tests Resistance Programming performance calibration This test verifies the resistance programming Note that the current readback accuracy must be verified before you can perform this test a Turn off the dc source Connect an electronic load directly to the output terminals of output 1 as shown in Figure B la Connect an external DMM 3458 directly to the sense terminals of output 1 Turn on the de source and select output 1 Note If you do not connect the RC network to the output you must set the unit to operate in LLOCAL compensation mode Turn on the electronic load Program the load to operate in constant current mode Set the load voltage to 15 V and the current to 0 A Program output 1 to 10 V and set the output resistance to zero ohms Record the voltage reading on the external DMM V1 and the current reading displayed on the front panel of the dc source I1 Set the load current to 2 8 A Record the voltage reading on the external DMM V2 and the current reading displayed on the front panel of the dc source 12 V2 V1 Calculate the Resistance value as follows R I1 Rlow This is the low output resistan
177. low signal on the INH input to disable the output The only way to clear the latch is by sending OUTPut PROTection CLEAR while the INH input is false LIVE allows the INH input to disable the output in a non latching manner In other words the output follows the state of the INH input When INH is low true the output is disabled When INH is high the output is not affected OFF the INH input is disabled OUTPut RI MODE lt mode gt LATChing LIVE OFF OUTP RI MODE LIVE OUTPut RI MODE lt CRD gt OUTP PROT CLE Command Syntax Parameters Examples Query Syntax Returned Parameters Related Commands 113 8 Language Dictionary SOURce CURRent This command sets the immediate current level of the dc source The immediate level is the current programmed for the output terminals SOURce CURRent LEVel IMMediate AMPLitude lt NRf gt see Table 8 3 A amperes 10 of MAX CURR 200 MA CURRENT LEVEL 200 MA SOURce CURRent LEVel IMMediate AMPLitude lt NR3 gt CURR TRIG Command Syntax Parameters Default Suffix RST Value Examples Query Syntax Returned Parameters Related Commands SOURce CURRent2 Agilent 66319B 66319D only This command sets the output current level of the auxiliary output SOURce CURRent2 LEVel IMMediate AMPLitude lt NRf gt see Table A 3 A amperes 10 of MAX CURR2 200 MA CURR2 LEVEL 200 MA SOURce CURRent2 LEVel IMMed
178. making front panel measurements Action Display 1 On the Function keypad press Meter to access the following measurement parameters dc voltage and current lt reading gt V lt reading gt A 2 To change the front panel time interval and buffer size for output waveform TINT 0 002 measurements press Shift Input Then press V until you obtain the TINT command Use the Entry keys to enter a value from 15 6 microseconds to 1 second in seconds Then press Enter 3 Continue by pressing Shift Input and Y until you obtain the POINT command POINT 1024 Press W to select a different buffer size The choices are 1 2 4 8 16 32 64 128 256 512 1024 and 2048 Then press Enter One reason to change the front panel time interval and data points is if the waveform being measured has a period shorter than 3 times the present front panel acquisition time 56 Front Panel Operation 5 6 Making Enhanced Front Panel Measurements The following figure illustrates the enhanced measurement capabilities of Agilent Models 66321B D and 66319B D for measuring output waveforms These include peak max minimum high level and low level measurements as illustrated in the following figure Rms and dc voltages are calculated from the number of points in the measurement window VorAMAX _ 46 8 microsecond sampling rate V or AHIGH NOTE Measurement samples may not coincide with the actual maximum or minimum point of the waveform V or ALOW
179. med setting by two volts when measured at the sense and sense terminals If the operation of the overvoltage protection circuit interferes with the proper operation of your phone test you can disable overvoltage protection As explained in chapter 8 this protection feature is implemented with the following command VOLT PROT STAT lt bool gt where lt bool gt is the voltage protection state 0 OFF 1 ON CAUTION If overvoltage protection is disabled the dc souce or the equipment under test will not be protected from excessive external voltages Output Current All models have a programmable current function The command to program the current is CURR lt n gt or CURR2 lt n gt for models that have a second output where lt n gt is the current limit in amperes If the load attempts to draw more current than the programmed limit the output voltage is reduced to keep the current within the limit Maximum Current The maximum output current that can be programmed can be queried with CURR MAX Overcurrent Protection The dc source can also be programmed to turn off its output if the current limit is reached As explained in chapter 8 this protection feature is implemented the following command CURR PROT STAT ON OFF NOTE Use the OUTPut PROTection DELay command to prevent momentary current limit conditions caused by programmed output changes from tripping the overcurrent protection Output Resistance
180. meric entry field Performance Calibration and Configuration B Front Panel Calibration Procedure These procedures assume you understand how to operate front panel keys see chapter 5 Make sure the sense terminals are directly jumpered to the output terminals Enable Calibration Mode Action Display 1 Reset the unit by selecting Output scrolling to RST and pressing Enter RST 2 Press Output On Off to enable the output 00 003V 0 0006A 3 To begin calibration press Shift Cal scroll to CAL ON and press Enter CAL ON 0 0 4 Enter the calibration password from Entry keypad and press Enter If the password is correct the Cal annunciator will come on If CAL DENIED appears then an internal switch has been set to prevent the CAL DENIED calibration from being changed lf the password is incorrect an error occurs If the active password is lost the OUT OF RANGE calibration function can be recovered by setting an internal switch that defeats password protection contact the factory for details Voltage Programming and Measurement Calibration Action Display 5 Connect the external DMM in voltage mode directly to output 1 Do not connect the load resistor or current shunt Select output 1 6 Press Shift Cal scroll to CAL VOLT and press Enter CAL VOLT Te Press Shift Cal scroll to CAL LEV and press Enter to select the first CAL LEV P1 calibration point 8 Press Shift Cal scroll to CAL DATA press Enter Number and enter
181. mmand completion commands For example you can send the OPC command after INITialize then occasionally poll the OPC status bit in the standard event status register for status completion while doing other tasks You can also set up an SRQ condition on the OPC status bit going true and do other tasks until the SRQ interrupts Multiple Triggers As shown in Figure 7 6 the de source also has the ability to set up several measurements in succession This is accomplished by specifying a trigger count NOTE Multiple triggers can only be programmed for voltage and current measurements on the main output output 1 Multiple triggers cannot be programmed for DVM measurements trigger 1 trigger 2 trigger 3 trigger level lt lt Measurement gt Measurement time interval X of points lt eSTTRIG ACQ COUN VOLT 3 or Ll TRIG ACQ COUN CURR 3 Figure 7 6 Multiple Measurements To set up the trigger system for a number of sequential acquisitions use TRIG ACQ COUN CURR lt number gt or TRIG ACQ COUN VOLT lt number gt With this setup the instrument performs each acquisition sequentially storing the digitized readings in the internal measurement buffer It is only necessary to initialize the measurement once at the start after each completed acquisition the instrument will wait for the next valid trigger condition to start another When all measurements complete use FETCh commands to return the data B
182. n figure 3 7 if the voltage drop in the negative load lead is 2 V you would not be able to correctly measure the 12 Vdc drop across R2 This is because when the voltage drop in the load lead is added to the voltage drops across R2 and R3 the resultant voltage is 26 Vdc which exceeds the 25 Vdc common mode rating of the DVM 37 3 Installation Measuring Circuits that are Floating with Respect to the Main Output In the example shown in figure 3 8 the common mode voltage between the DVM inputs and the minus terminal of the main output output 1 includes an undefined floating voltage that may result in incorrect readings due to clipping by the internal DVM measurement circuits This will occur when the 4 5 Vdc to 25 Vdc common mode voltage range is exceeded The solution to this problem would be to provide a known or controlled common mode voltage by connecting a jumper wire from the floating voltage to be measured to the main output In this example the main output is set to 5V the ac voltage to be measured is approximately 6 Vac 8 5 Vpeak and a jumper wire connects one side of the bias transformer to the main output terminal This stabilizes the common mode voltage and offsets it by the output voltage value 5 V The peak common mode voltage is now 8 5V 5 V 13 5 V on the positive side and 8 5V 5 V 3 5 V on the negative side with both voltages now being within the common mode range of the DVM 6 V Bias Tr
183. n output 1 is selected a small 1 appears in the left most digit When output 2 is selected a small 2 appears in the left most digit Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters DISPlay MODE DISPlay CHANnel lt channel gt 112 1 DISPLAY CHANNEL 2 DISPlay CHANnel lt NRI gt Oorl Switches the display between its normal instrument functions and a mode in which it displays text sent by the user Text messages are defined with the DISPlay TEXT command Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters DISPlay TEXT DISPlay WINDow MODE lt mode gt NORMal TEXT NORM DISP MODE NORM DISPLAY MODE TEXT DISPlay WINDow MODE lt CRD gt NORMAL or TEXT This command sends character strings to the display when the display mode is set to TEXT The character string is case sensitive and must be enclosed in either single or double quotes The display is capable of showing up to 14 characters Strings exceeding 14 characters will be truncated Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters DISPlay WINDow TEXT DATA lt display_string gt lt display string gt null string DISP TEXT DEFAULT_MODE DISPlay WINDow TEXT lt STR gt Last programmed text string 99 8 Language Dictionary Measurement Commands Measurement commands consist of format m
184. n point 27 Press Shift Cal and scroll to CAL DATA Wait for the DMM reading to CAL DATA 0 00 stabilize Press Enter Number and enter the current reading displayed on the DMM in amperes Press Enter 0 02A Range Current Measurement Calibration Action Display 28 Disconnect all loads from the dc source but leave the sense jumpers in place Do not connect any equipment to the output until after step 29 29 Press Shift Cal scroll to CAL CURR MEAS LOW and press Enter CAL CURR MEAS LOW 30 Connect the 800 ohm calibration load resistor to output 1 as shown in figure B 1c Connect the external DMM in current mode in series with the load 31 Press Shift Cal scroll to CAL LEV and press Enter to select the first CAL LEV P1 calibration point 32 Press Shift Cal and scroll to CAL DATA Wait for the DMM reading to CAL DATA 0 00 stabilize Press Enter Number and enter the current reading displayed on the DMM in amperes Press Enter NOTE You must convert the value on the DMM to amperes otherwise an error will occur 158 Performance Calibration and Configuration B AC Current Measurement Calibration 33 34 35 Agilent 66319B D Output 2 Current Programming Measurement Calibration 36 37 38 39 40 41 Action Disconnect all loads from the dc source but leave the sense jumpers in place Press Shift Cal and scroll to CAL CURR MEAS AC and press Enter Wait for the dc source to compute the ac current calib
185. nd cause the memory to fail SOURce RESistance This command sets the output resistance of the dc source Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands SOURce RESistance SOURce RESistance LEVel IMMediate AMPLitude lt NRf gt see Table 8 3 0 RES 0 5 set output resistance to 0 5Q SOURce RESistance LEVel IMMediate AMPLitude lt NR3 gt RES TRIG TRIGger This command sets the pending triggered output resistance of the dc source Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands 116 SOURce RESistance LEVel TRIGgered AMPLitude lt NRf gt see Table 8 3 0 RES TRIG 1 set triggerd resistance to 1Q SOURce RESistance LEVel TRIGgered AMPLitude lt NR3 gt RES SOURce VOLTage Language Dictionary 8 This command sets the output voltage level of the dc source Command Syntax Parameters Default Suffix RST Value Examples Query Syntax Returned Parameters Related Commands SOURce VOLTage2 Agilent 66319B 66319D only SOURce VOLTage LEVel IMMediate AMPLitude lt NRf gt see Table 8 3 V volts 0 VOLT 2 5 set output voltage to 2 5V SOURce VOLTage LEVel IMMediate AMPLitude lt NR3 gt VOLT TRIG VOLT PROT This command sets the output voltage level of the auxiliary output Command Syntax Parameters Default Suffi
186. ne output Display SCPI error codes and clear the error queue Save and recall up to 4 instrument operating configurations Select the programming language Enable disable the remote front panel interface Function Keys Function access command menus that let you Enable or disable the output Select metering functions Program output voltage current and resistance Display the protection status state Set and clear protection functions Set the output state at power on Calibrate the de source Select the output compensation A and V scroll through the front panel menu commands Entry Keys Entry keys let you Enter programming values Increment or decrement programming values m and select the front panel menu parameters 46 Front Panel Operation 5 System Keys Refer to the examples later in this chapter for more details on the use of these keys SYSTEM Channel Error Save l Figure 5 2 System Keys This is the blue unlabeled key which is also shown as in this guide Pressing this key accesses the alternate or shifted function of a key such as ERROR Release the key after you press it The Shift annunciator is lit indicating that the shifted keys are active Press to change the dc source s selected interface from remote operation to local front panel operation Pressing the key will have no effect if the interface state is already Local Local with Lockout or Remote with Lockout Press to acces
187. nect the 4 INH FLT connector Can Connector plugis interface connector Agilent 14575A remote be configured for Digital I O removable front panel display and Trigger input Connector plug is removable WARNING WARNING FOR CONTINUED FIREAROTECTION USE SPECIFIED LINI 5 Output 2 connector 6 Output 1 connector 7 Power cord Agilent 66319B D only Connector plug is removable connector IEC 320 Connector plug is removable IMPORTANT Install this connector with its supplied sense jumpers before applying power to the unit Instrument Configuration Use the front panel Address key to configure the interface Refer to Front Panel Menus At a Glance Enter the GPIB bus address Display the firmware revision and serial number 12 Quick Reference 1 Front Panel Number Entry Enter numbers from the front panel using one the following methods Use the arrow keys and knob to change voltage or current settings NOTE The output must be ON to see the displayed values change in Meter mode With the output enabled this method changes the output voltage or current immediately EEE gt AND e Use the Function keys and knob to change the displayed settings AND
188. nformation Cleaning Use a dry cloth or one slightly dampened with water to clean the external case parts Do not attempt to clean internally WARNING To prevent electric shock unplug the unit before cleaning 26 Installation 3 Location Figure 3 1 gives the dimensions of your de source The de source must be installed in a location that allows sufficient space at the sides and back of the unit for adequate air circulation see Bench Operation NOTE This dc source generates magnetic fields that may affect the operation of other instruments If your instrument is susceptible to operating magnetic fields do not locate it in the immediate vicinity of the dc source Typically at three inches from the dc source the electromagnetic field is less than 5 gauss Many CRT s such as those used in computer displays are susceptible to magnetic fields much lower than 5 gauss Check susceptibility before mounting any display near the dc source Bench Operation Do not block the fan exhaust at the rear of the unit A fan cools the de source by drawing air in through the sides and exhausting it out the back Minimum clearances for bench operation are 1 inch 25 mm along the sides Rack Mounting The dc source can be mounted in a standard 19 inch rack panel or cabinet Table 2 1 documents the part numbers for the various rack mounting options that are available for the dc source Installation instructions are included with each rack
189. ngineers 345 East 47th Street New York NY 10017 USA The WEB address is www ieee org SCPI References The following documents will assist you with programming in SCPI Standard Commands for Programmable Instruments Volume 1 Syntax and Style Standard Commands for Programmable Instruments Volume 2 Command References Standard Commands for Programmable Instruments Volume 3 Data Interchange Format Standard Commands for Programmable Instruments Volume 4 Instrument Classes To obtain a copy of the above documents contact Fred Bode Executive Director SCPI Consortium 8380 Hercules Drive Suite P3 Ls Mesa CA 91942 USA 61 6 Introduction to Programming VXlplug amp play Power Products Instrument Drivers VXIplug amp play instrument drivers for Microsoft Windows 95 and Windows NT are now available on the Web at http www agilent com find drivers These instrument drivers provide a high level programming interface to your Agilent Technologies instrument VXIplug amp play instrument drivers are an alternative to programming your instrument with SCPI command strings Because the instrument driver s function calls work together on top of the VISA I O library a single instrument driver can be used with multiple application environments Supported Applications Agilent VEE Microsoft Visual BASIC Microsoft Visual C C Borland C C National Instruments Lab VIEW National Instruments LabWindows CVI System Requirement
190. ning the instantaneous output voltage in volts The output voltage or current is digitized whenever a measure command is sent or an acquire trigger occurs The time interval is set by SENSe SWEep TINTerval The position of the trigger relative to the beginning of the data buffer is determined by SENSe S WEep OFFSet The number of points returned is set by SENSe SWEep POINts Query Syntax Parameters Examples Returned Parameters Related Commands MEASure ARRay VOLTage DC FETCh ARRay VOLTage DC None MEAS ARR VOLT FETC ARR VOLT lt NR3 gt lt NR3 gt SENS SWE TINT SENS SWE OFFS SENS SWE POIN 101 8 Language Dictionary MEASure CURRent MAX MIN lt NR3 gt FETCh CURRent These queries return the dc output current You can specifying an optional range parameter for the MEASure CURent query This lets you use a different current range for a single measurement instance without having to change the current range using the SENSe CURRent RANGe command Afer the measurement completes the range returns to the value specified by SENSe CURRent RANGe Query Syntax Parameters Examples Returned Parameters Related Commands MEASure CURRent2 Agilent 66319B D only MEASure SCALar CURRent DC MAX MIN lt NR3 gt FETCh SCALar CURRent DC None MEAS CURR FETC CURR DC lt NR3 gt MEAS VOLT SENS CURR RANG This query measures the output current at the auxiliary output Out
191. of the pulse waveform is known and the measurement interval can be set accordingly using the SENSe SWEep TINTerval command NOTE Neither window function alters the instantaneous voltage or current data returned in the measurement array Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters SENSe WINDow TYPE lt type gt HANNing RECTangular HANNing SENS WIND RECT SENSe WINDow TYPE lt CRD gt 109 8 Language Dictionary Output Commands Output commands consist of instrument output and source commands Instrument commands control the output coupling on Agilent 66319B 66319D units Output commands control the output and digital port functions Source commands program the actual voltage current and digital port output INSTrument COUPle OUTPut STATe This command controls the ON OFF function of Output 1 and Output 2 When outputs 1 and 2 are coupled ALL OUTPut commands will turn both outputs ON or OFF together When not coupled use OUTPut1 or OUTPut2 to turn the specified output ON or OFF individually To have the unit turn on with the outputs uncoupled set the output coupling to NONE save this state in location 0 and set the power on state to RCL 0 Note that when an output state is recalled the outputs are set to the state in which they were in when the state was saved regardless of the output coupling setting Command Syntax INSTrument COUPle OUTPut STATe lt stat
192. omenclature The dc source uses the following sequence name and alias for the measurement trigger system The alias can be used instead of the sequence form Sequence Form Alias SEQuence2 ACQuire Measurement Trigger Model Figure 7 4 is a model of the measurement trigger system The rectangular boxes represent states The arrows show the transitions between states These are labeled with the input or event that causes the transition to occur ABORt IDLE STATE RST lt RCL INITiate IMMediate INITIATED STATE TRIGGER RECEIVED SENSe SWEep POINts ACQUIRED A EES A A SC lt TRiGger COUNt gt COMPLETE kuns Paai ee YES NO Figure 7 4 Model of Measurement Trigger System 80 Programming the DC Source 7 Enabling the Measurement Trigger System When the dc source is turned on the trigger system is in the idle state In this state the trigger system is disabled and it ignores all triggers Sending the following commands at any time returns the trigger system to the idle state ABORt RST RCL The INITiate commands move the trigger system from the idle state to the initiated state This enables the measurement system to receive triggers To initiate the measurement trigger system use INIT SEQ2 or NIT NAME ACQ After a trigger is received and the data acquisition completes the trigger system will return to the idle state unless multipl
193. ommands are MEAS ARR CURR MEAS ARR VOLT Making DVM Measurements Agilent Models 66321D and 66319D have a DVM input on the rear panel for making independent voltage measurements The common mode voltage range of the DVM is 4 5 V to 25 V from either DVM input with respect to the negative output terminal of output 1 To protect the DVM from damage keep the maximum isolation voltage to ground at less than 50 Vdc To obtain correct voltage measurements keep the common mode voltage within the specified limits Refer to chapter 3 under DVM Connection for more information The DVM can only measure average and rms voltage Its measurement parameters are not programmable They are fixed at 2048 data points with a 15 6 microsecond sampling rate using a Hanning window Use the SCPI language MEASure and FETCh queries to return measurements Note that all triggered measurement functions discussed the next section also apply to DVM measurements NOTE There is only one measurement system in the dc source Therefore you can perform only one measurement function voltage current or DVM at a time Average Measurements To measure the average voltage use MEAS DVM DC Average voltage measured by acquiring a number of readings at the selected time interval applying a Hanning window function to the readings and averaging the readings Windowing is a signal conditioning process that reduces the error in average measurements made
194. on when pressed Other function keys have commands underneath them that are accessed when the key is pressed This key toggles the output of the dc source between the on and off states When coupled the key affects both output channels It immediately executes its function as soon as you press it When off the dc source output is disabled and the Dis annunciator is on Press this key to reset the protection circuit and allow the unit to return to its last programmed state The condition that caused the protection circuit to become active must be removed prior to pressing this key or the unit will shut down again and display the Prot annunciator again Press this key to toggle between OCP enabled and disabled If OCP is enabled the output will become disabled if the output mode changes from CV to CC mode The OCP annunciator indicates the state of OCP Scrolling Keys Scrolling keys let you move through the commands in the presently selected function menu Press a to bring up the next command in the list Press pal to go back to the previous command in the list Function menus are circular you can return to the starting position by continuously pressing either key The following example shows the commands in the Input function menu CURR RANGE lt char gt P CURR DET lt char gt 48 Metering Keys Front Panel Operation 5 Metering keys control the metering functions of the dc source As set from the factory all front
195. onitor to the output terminals of output 1 Connect the DMM in voltage mode across the current shunt Select output 1 18 Press Shift Cal scroll to CAL CURR and press Enter CAL CURR 19 Press Shift Cal scroll to CAL LEV and press Enter to select the first CAL LEV P1 calibration point 20 Press Shift Cal and scroll to CAL DATA Wait for the DMM reading to CAL DATA 0 00 stabilize Then read the DMM and compute the first current value DMM reading shunt resistance Press Enter Number and enter the first current value in amperes Press Enter 21 Press Shift Cal scroll to CAL LEV use to scroll to P2 the second CAL LEV P2 calibration point and press Enter 22 Press Shift Cal and scroll to CAL DATA Wait for the DMM reading to CAL DATA 0 00 stabilize Then read the DMM and compute the second current value DMM reading shunt resistance Press Enter Number and enter the second current value in amperes Press Enter 1A Range Current Measurement Calibration Action Display 23 Disconnect all loads from the dc source but leave the sense jumpers in place Do not connect any equipment to the output until after step 24 24 Press Shift Cal scroll to CAL CURR MEAS R3 and press Enter CAL CURR MEAS R3 25 Connect the external DMM in current mode directly to the output 1 terminals The DMM must be capable of measuring up to 1A 26 Press Shift Cal scroll to CAL LEV and press Enter to select the first CAL LEV P1 calibratio
196. or hardware shall be uninterrupted or error free For warranty service with the exception of warranty options this product must be returned to a service facility designated by Agilent Technologies Customer shall prepay shipping charges by and shall pay all duty and taxes for products returned to Agilent Technologies for warranty service Except for products returned to Customer from another country Agilent Technologies shall pay for return of products to Customer Warranty services outside the country of initial purchase are included in Agilent Technologies product price only if Customer pays Agilent Technologies international prices defined as destination local currency price or U S or Geneva Export price If Agilent is unable within a reasonable time to repair or replace any product to condition as warranted the Customer shall be entitled to a refund of the purchase price upon return of the product to Agilent Technologies LIMITATION OF WARRANTY The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Customer Customer supplied software or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation and maintenance NO OTHER WARRANTY IS EXPRESSED OR IMPLIED AGILENT TECHNOLOGIES SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE EXCLUSIVE REM
197. ormally Open INH Input Output Q s ag INH Common NOTE Connectors are removable FLT Trigger signal Output U pig or contact closure Signal Common Figure 3 9 FLT INH Examples In example C when functioning as a measurement trigger input a negative going edge signal applied to the TRG input sends an external trigger signal to the trigger system You can either apply a negative going edge signal to the TRG input pin referenced to common or apply a contact switch to short the TRG input to common Note that in this configuration pins 1 and 2 are not used 39 3 Installation Digital I O Connections As shown in Table 3 3 and Figure 3 10 the 4 pin connector can also be configured as a digital I O port Information on programming the digital I O port is found in chapter 5 and under SOURce DIGital DATA and SOURce DIGital FUNCtion commands in chapter 8 The electrical characteristics of the digital connector are described in appendix A gt Digital Output 16 5V Max Ports 0 1 2 Ul Coil Current S TTL AS CMOS HC OOo i A OO NOTE Connectors Relay Driver are removable Ports 0 1 2 contains internal Digital Input clamp diodes for Port 2 inductive flyback INH FLT A Relay Circuits B Digital Interface Circuits Figure 3 10 Digital I O Examples Computer Connections The dc source can be controlled through a GPIB interface Follow t
198. ote that the dc source cannot be programmed to operate in a specific mode After initial turn on the operating mode of the unit will be determined by the voltage setting current setting and the load resistance In figure 2 1 operating point 1 is defined by the load line traversing the positive operating quadrant in the constant voltage region Operating point 2 is defined by the load line traversing the positive operating quadrant in the constant current region Figure 2 1 also shows a single range two quadrant capability This means that the dc source is capable of sourcing as well as sinking current over the output voltage range from zero volts to the rated voltage This negative current sinking capability provides fast downprogramming of the output of the dc source It can also be used to sink current from a battery charger thus providing battery charger test capability The negative current is not programmable and varies linearly from approximately 1 2 amperes at the full rated voltage to approximately 2 8 amperes at zero output voltage 21 2 General Information NOTE Operating the dc source beyond its output ratings may cause the output to become unregulated This is indicated by the UNR annunciator on the front panel The output may also become unregulated if the ac line voltage drops below the minimum rating specified in Appendix A Programmable Output Resistance Programmable output resistance lets you emulate the internal resi
199. ou calibrate from a controller Each front panel calibration command has a corresponding SCPI command When you write your calibration program perform the calibration procedure in the same order as the front panel procedure documented in this appendix The SCPI calibration commands are explained in chapter 8 Calibration error messages that can occur during GPIB calibration are shown in table B 3 Performing the Configuration Procedure The configuration procedure lets you customize the power on RST defaults of the following settings e Output compensation mode e Output coupling e Output relay mode e Output OVP setting You can only customize these default settings from the front panel by first accessing the calibration menu In this way any changes to the configuration settings are secured by the calibration password protection feature All configuration settings can also be returned to the factory state using the configuration procedure To access the front panel commands for the configuration function the calibration state must be enabled If a calibration password is set the password must be provided to enable calibration Once calibration is enabled the front panel will be in Meter mode The configuration function can only be invoked while in meter mode If for some reason the front panel is not in meter mode press the Meter key To access the configuration menu you must then simultaneously press the Local and the Recall keys
200. output of the unit The CC annunciator is on indicating that the unit is in constant current mode The unit is sourcing output current at the maximum rating which is the default output current limit setting Programs the output current to 1 ampere You enabled the overcurrent protection circuit The circuit then tripped because the unit was operating in constant current mode The CC annunciator turns off and the OCP and Prot annunciators turn on You have disabled the overcurrent protection circuit The OCP annunciator turns off Restores the output The Prot annunciator turns off The CC annunciator turns on The next time the unit turns on it will be restored to the RST or factory default state Only perform steps 19 to 29 if you are verifying an Agilent 66319B or 66319D unit 19 20 21 22 42 Procedure Turn the unit on Wait for selftest to complete and press Shift Channel Press Voltage Enter Number lt 12 gt Enter Press Output On Off Press Output On Off Display 20 025V 0 0002A VOLT lt 12 gt 212 005V 0 0002A 20 000V 0 0000A Explanation Shift Channel toggles between channel 1 and channel 2 The left most digit of the display identifies the output channel that is presently being controlled It will indicate a 1 for channel 1 or 2 for channel 2 Programs the output 2 voltage to 12 volts Turns the main output and output 2 on The Dis annunciator is off but the CV
201. ow level output voltage 0 5 V max INH Trigger Terminals Low level input voltage 0 8 V max High level input voltage 2 V min Low level input current 1 mA Pulse width 100 us minimum INH time delay 4 ms typical Trigger latency 15 6 us to 32 Us Digital I O Characteristics Maximum ratings same as FLT INH Trigger Characteristics Digital OUT Port 0 1 2 open collector Output leakage 16V 0 1 mA ports 0 1 12 5 mA port 2 Output leakage 5V 0 1 mA ports 0 1 0 25 mA port 2 Low level output sink current 0 5 V 4mA Low level output sink current 1 V 50 mA Low level input current 0 4 V 1 25 mA High level input current 5 V 0 25 mA Low level input voltage 0 8 V max High level input voltage 2 0 V min Digital IN Port 2 internal pull up Isolation to Ground Maximum from either output terminal to chassis Mains Input Ratings at full load from 47 63 Hz 66321B D 1 6 A 125 W 1 4 A 125 W 66319B D 2 2 A 170 W 1 7 A 170 W 100 Vac 87 106 Vac 120 Vac 104 127 Vac 220 Vac 191 233 Vac 0 8 A 125 W 0 96 A 170 W 230 Vac 207 253 Vac 0 75A 125 W 0 85A 170 W For a pulse waveform the accuracy of any individual data point in the buffer depends on the rise time of the pulse For a current pulse of 1 4A with a rise time constant of 50us the error in measurement of a single data point during the rise time is 10mA May be reduced by changing the default conditions of 20
202. owed too many parameters Missing parameter too few parameters Program mnemonic too long maximum 12 characters Undefined header operation not allowed for this device Check the language setting Header suffix out of range value of numeric suffix is invalid Invalid character in number includes 9 in octal data etc Numeric overflow exponent too large exponent magnitude gt 32 k Too many digits number too long more than 255 digits received Numeric data not allowed 163 C Error Messages 164 Table C 1 Error Numbers continued Invalid suffix unrecognized units or units not appropriate Suffix not allowed Invalid character data bad character or unrecognized Character data too long Character data not allowed String data error Invalid string data e g END received before close quote String data not allowed Block data error Invalid block data e g END received before length satisfied Block data not allowed Expression error Invalid expression Expression data not allowed Execution Errors 200 through 299 sets Standard Event Status Register bit 4 Execution error generic Data out of range e g too large for this device Too much data out of memory block string or expression too long Illegal parameter value device specific Out of memory Macro error Macro execution error Illegal macro label Macro recursion error Macro redefinition not allowed System Errors 300 through 399 sets
203. put 2 measurements are calculated from a total of 2048 readings taken at a 15 6 microsecond sampling rate These parameters are fixed Query Syntax Parameters Examples Returned Parameters Related Commands MEASure SCALar CURRent2 DC None MEAS CURR2 FETC CURR2 DC lt NR3 gt MEAS VOLT2 MEASure CURRent ACDC FETCh CURRent ACDC These queries return the act dc rms output current Query Syntax Parameters Examples Returned Parameters Related Commands 102 MEASure SCALar CURRent ACDC FETCh SCALar CURRent ACDC None MEAS CURR ACDC FETC CURR ACDC lt NR3 gt MEAS VOLT ACDC Language Dictionary 8 MEASure CURRent HIGH FETCh CURRent HIGH These queries return the High level current of a current pulse waveform The instrument first measures the minimum and maximum data points of the pulse waveform It then generates a histogram of the pulse waveform using 16 bins between the maximum and minimum data points The bin containing the most data points above the 50 point is the high bin The average of all the data points in the high bin is returned as the High level If no high bin contains more than 1 25 of the total number of acquired points then the maximum value is returned by these queries Query Syntax MEASure SCALar CURRent HIGH FETCh SCALar CURRent HIGH Parameters None Examples MEAS CURR HIGH FETC CURR HIGH Returned Parameters lt NR3 gt Related Commands MEAS CURR LOW C
204. r hysteresis band limit Command Syntax TRIGger SEQuence2 HYSTeresis CURRent lt NRf gt TRIGger ACQuire HYSTeresis CURRent lt NRf gt Parameters 0 to MAX see table 8 3 Unit A amperes RST Value 0 Examples TRIG SEQ2 HYST CURR 0 5 TRIG ACQ HYST CURR 0 5 Query Syntax TRIGger SEQuence2 HYSTeresis CURRent TRIGger ACQuire HYSTeresis CURRent Returned Parameters lt NR3 gt Related Commands TRIG SEQ2 HYST VOLT TRIG SEQ2 LEV CURR 127 8 Language Dictionary TRIGger SEQuence2 HYSTeresis DVM TRIGger ACQuire HYSTeresis DVM Agilent 66321D 66319D only This command defines a band around the trigger level through which the input signal must pass before a DVM measurement can occur The band limit above and below the trigger level is one half of the hysteresis value added to or subtracted from the trigger level For a positive trigger to occur the excursion of an input signal in the positive direction must start below the lower hysteresis band limit and pass through the upper hysteresis band limit For a negative trigger to occur the excursion of an input signal in the negative direction must start above the upper hysteresis band limit and pass through the lower hysteresis band limit Command Syntax TRIGger SEQuence2 HYSTeresis DVM lt NRf gt TRIGger ACQuire HYSTeresis D VM lt NRf gt Parameters 0 to MAX see table A 3 Unit V volts RST Value 0 Examples TRIG SEQ2 HYST DVM 0 5 TRIG ACQ HYST DVM 0 5 Quer
205. r load lead is open sense open a positive and negative sense or load lead is open sense open incorrect voltage reading on the sense leads the unit may need to be recalibrated If the front panel display shows OVLD this indicates that the output voltage or current is beyond the range of the meter readback circuit If this is the case check that the setting of the output compensation is correct for the phone you are testing If the front panel display indicates an GPIB measurement is in progress Line Fuse If the dc source appears dead with a blank display and the fan not running check your ac mains to be certain line voltage is being supplied to the dc source If the ac mains is normal the internal line fuse may be defective Refer to Appendix E and follow the procedure described in the appendix for accessing and replacing the line fuse located inside the unit Do not change any of the line voltage connections NOTE If the dc source has a defective fuse replace it only once If it fails again the dc source requires service 44 Front panel Operation Introduction Here is what you will find in this chapter acomplete description of the front panel controls front panel programming examples NOTE The dc source must be in set to Local mode to use the front panel controls Press the Local key on the front panel to put the unit in local mode Front Panel Description SYSTEM FUNCTION ENTR
206. ration constant The display returns to Meter mode when the calculation is complete Action Connect the appropriate current monitor to the output terminals of output 2 Connect the DMM in voltage mode across the current shunt Select output 2 Press Shift Cal scroll to CAL CURR2 and press Enter Press Shift Cal scroll to CAL LEV and press Enter to select the first calibration point Press Shift Cal and scroll to CAL DATA Wait for the DMM reading to stabilize Then read the DMM and compute the first current value DMM reading shunt resistance Press Enter Number and enter the first current value in amperes Press Enter Press Shift Cal scroll to CAL LEV use to scroll to P2 the second calibration point and press Enter Press Shift Cal and scroll to CAL DATA Wait for the DMM reading to stabilize Then read the DMM and compute the second current value DMM reading shunt resistance Press Enter Number and enter the second current value in amperes Press Enter Resistance Calibration 42 43 44 45 46 47 48 49 50 Action Disconnect all loads from the dc source but leave the sense jumpers in place Connect an electronic load directly to the output terminals of output 1 as shown in figure B 1a Connect an external DMM directly to the sense terminals of output 1 Turn on the electronic load Program the load to operate in constant current mode and set the load current to 2 amperes Press Shi
207. re not directly related to output control or measurement functions SYSTem ERRor This query returns the next error number followed by its corresponding error message string from the remote programming error queue The queue is a FIFO first in first out buffer that stores errors as they occur As it is read each error is removed from the queue When all errors have been read the query returns 0 NO ERROR If more errors are accumulated than the queue can hold the last error in the queue will be 350 TOO MANY ERRORS see Appendix C for other error codes You can use the front panel Error key to read errors from the queue Errors generated at the front panel are not put into the queue but appear immediately on the display Query Syntax Parameters Returned Parameters Examples SYSTem LANGuage SYSTem ERRor None lt NR1 gt lt SRD gt SYST ERR This command selects the command language The SCPI command language is the only language supported Command Syntax Parameters Power on Value Example Query Syntax Returned Parameters SYSTem VERSion SYSTem LANGuage lt string gt SCPI SCPI SYST LANG SCPI SYSTem LANGuage lt CRD gt This query returns the SCPI version number to which the instrument complies The returned value is of the form YYYY V where YYYY represents the year and V is the revision number for that year Query Syntax Parameters Returned Parameters Examples SYSTem VERSion None lt NR2
208. red current value that is transferred to the output terminals when a trigger occurs In order for a trigger to occur the trigger subsystem must be initiated see the INITiate command in the trigger subsystem Command Syntax SOURce CURRent LEVel TRIGgered AMPLitude lt NRf gt Parameters see Table 8 3 Default Suffix A amperes RST Value 10 of MAX Examples CURR TRIG 1CURRENT LEVEL TRIGGERED 1 Query Syntax SOURce CURRent LEVel TRIGgered AMPLitude Returned Parameters lt NR3 gt SOURce CURRent2 TRIGger Agilent 66319B 66319D only This command sets the triggered current level of the auxiliary output The triggered level is a stored value that is transferred to the output when a trigger occurs In order for a trigger to occur the trigger subsystem must be initiated see the INITiate command Command Syntax SOURce CURRent2 LEVel TRIGgered AMPLitude lt NRf gt Parameters see Table A 3 Default Suffix A amperes RST Value 10 of MAX Examples CURR2 TRIG 1 CURR2 LEV TRIG 1 Query Syntax SOURce CURRent2 LEVel TRIGgered AMPLitude Returned Parameters lt NR3 gt SOURce DIGital DATA This command programs the digital control port when the port is configured for Digital I O operation The port has three signal pins and a digital ground pin Pins 1 and 2 are output pins controlled by bits 0 and 1 Pin 3 is controlled by bit 2 and can be programmed to serve either as an
209. register 86 Programming the DC Source 7 Questionable Status Group The Questionable Status registers record signals that indicate abnormal operation of the dc source As shown in figure 7 7 the group consists of the same type of registers as the Status Operation group The outputs of the Questionable Status group are logically ORed into the QUEStionable summary bit 3 of the Status Byte register read only register PTR Filter STAT QUES PTR lt n gt A positive transition filter that functions as described under STAT QUES NTR PTR commands in chapter 8 It is a read write register AT QUES N NTR Filter A negative transition filter that functions as described under STAT QUES NTR PTR commands in chapter 8 It is a read write register filters It is a read only register that is cleared when read register It is a read write register Standard Event Status Group This group consists of an Event register and an Enable register that are programmed by Common commands The Standard Event event register latches events relating to instrument communication status see figure 7 7 It is a read only register that is cleared when read The Standard Event enable register functions similarly to the enable registers of the Operation and Questionable status groups Command Action ESE programs specific bits in the Standard Event enable register
210. rformance Tests These tests check that the dc source meets all of the specifications listed in Appendix A NOTE If the de source fails any of the tests or if abnormal test results are obtained return the unit to an Agilent Technologies repair facility This appendix also includes calibration procedures for the Agilent 66319B D 66321B D Mobile Communications DC Sources Instructions are given for performing the procedures either from the front panel or from a controller over the GPIB IMPORTANT Perform the calibration verification before calibrating your dc source If the de source passes the verification procedures the unit is operating within its calibration limits and does not need to be re calibrated The configuration procedure documented at the end of this appendix lets you customize the power on RST default settings of the dc source This lets you customize the power on settings of the dc source to a specific application without always having to reconfigure the instrument each time power is applied Equipment Required The equipment listed in the following table or the equivalent to this equipment is required for the calibration and performance tests A test record sheet with specification limits when test using the recommended test equipment may be found at the back of this section Table B 1 Equipment Required Recommended Model Digital Voltmeter Resolution 10 nV 1V Readout 8 1 2 digits Agilent 3458A or Accuracy
211. rms voltage ac dc Returns the HIGH level of a voltage pulse Returns the LOW level of a voltage pulse Returns maximum voltage Returns minimum voltage Enables disables the dc source output Sets output compensation HREMOTE LREMOTE HLOCAL LLOCAL Enables disables the DFI output Selects event source QUES OPER ESB RQS OFF Set power on state RST RCLO Reset latched protection Delay after programming before protection Specifies the output relay mode DD HD DH or HH Sets remote inhibit operating mode LATC LIVE OFF Selects the high current measurement range Selects the current measurement detector ACDC DC Configures the measurement sensor VOLT CURR DVM Returns the setting of the open sense detection circuit Enables disables open sense lead detection Defines the pre post data capture in the measurement Define the number of data points in the measurement Sets the digitizer sample spacing Sets the measurement window function HANN RECT Sets the output current limit Sets the triggered output current limit Enables disables current limit protection Sets the output2 current level Sets the triggered output2 current level Sets and reads the digital control port Configures digital control port RIDF DIG TRIG Sets the output resistance Sets the triggered output resistance Sets the output voltage level Sets the triggered output voltage level 93 8 Language Diction
212. rnal measurement trigger input Earlier models not covered in this manual order manual p n 5964 8125 Available only on units with firmware revision A 03 01 and up Front Panel Controls The front panel has both rotary and keypad controls for setting the output voltage and current The panel display provides digital readouts of a number of output measurements Annunciators display the operating status of the dc source System keys let you perform system functions such as setting the GPIB address and recalling operating states Front panel Function keys access the dc source function menus Front panel Entry keys let you select and enter parameter values Refer to chapter 5 for a complete description of the front panel controls Remote Programming NOTE The dc sources described in this manual can only be programmed using the SCPI programming language The dc source may be remotely programmed via the GPIB bus GPIB programming is with SCPI commands Standard Commands for Programmable Instruments which make dc source programs compatible with those of other GPIB instruments Dc source status registers allow remote monitoring of a wide variety of dc source operating conditions Refer to chapters 6 and 7 for more information Chapter 8 is a language dictionary of all SCPI commands that can be used to program the dc source 20 General Information 2 Output 1 Characteristic The dc source s main output output 1 characteristic
213. rns the digitized instantaneous voltage Returns dc current Returns the total rms current ac dc Returns the HIGH level of a current pulse Returns the LOW level of a current pulse Returns maximum current Returns minimum current Language Dictionary 8 Table 8 1 Subsystem Commands Syntax continued DVM DC ACDC VOLTage DC ACDC HIGH LOW MAX MIN OUTPut 112 STATe lt bool gt COMPensation MODE lt mode gt DFI STATe lt bool gt SOURCce lt source gt PON STATe lt state gt PROTection CLEar DELay lt n gt RELay MODE lt mode gt RI MODE lt mode gt SENSe CURRent DC RANGe UPPer lt n gt DETector lt detector gt FUNCtion lt function gt LEAD STATus PROTection STATe lt state gt SWEep OFFSet POINts lt n gt POINts lt n gt TINTerval lt n gt WINDow TYPE lt type gt SOURce CURRent LEVel IMMediate AMPLitude lt n gt TRIGgered AMPLitude lt n gt PROTection STATe lt bool gt CURRent2 LEVel IMMediate AMPLitude lt n gt TRIGgered AMPLitude lt n gt DIGital DATA VALue lt n gt FUNCtion lt function gt RESistance LEVel IMMediate AMPLitude lt n gt TRIGgered AMPLitude lt n gt VOLTage LEVel IMMediate AMPLitude lt n gt TRIGgered AMPLitude lt n gt Returns DVM dc voltage measurement Returns DVM rms voltage measurement Returns dc voltage Returns the total
214. ront panel key has been depressed while in local mode The overtemperature protection has tripped An open sense lead has been detected UNR2 Output 2 is unregulated RI The remote inhibit state is active UNR The output is unregulated OC2 Output 2 overcurrent protection has tripped MeasOvld Current measurement exceeded capability of low range Standard Event Status Group Operation complete Query error Device dependent error Execution error Command error Power on Status Byte and Service Request Enable Registers Questionable status summary bit Message Available summary bit Event Status Summary bit Master Status Summary bit Request Service bit Operation status summary bit Operation Status Group The Operation Status registers record signals that occur during normal operation As shown below the group consists of a Condition PTR NTR Event and Enable register The outputs of the Operation Status register group are logically ORed into the OPERation summary bit 7 of the Status Byte register read only register A positive transition filter that functions as described under STAT OPER NTRIPTR commands in chapter 8 It is a read write register NTR Filter STAT OPER NTR lt n gt A negative transition filter that functions as described under STAT OPER NTRIPTR commands in chapter 8 It is a read write register AT OPER EVE Peo filters It is a read only register that is cleared when read register It is a read write
215. rs None Examples MEAS VOLT ACDC FETC VOLT ACDC Returned Parameters lt NR3 gt Related Commands MEAS CURR ACDC MEASure VOLTage HIGH FETCh VOLTage HIGH These queries return the High level voltage of a voltage pulse waveform The instrument first measures the minimum and maximum data points of the pulse waveform It then generates a histogram of the pulse waveform using 16 bins between the maximum and minimum data points The bin containing the most data points above the 50 point is the high bin The average of all the data points in the high bin is returned as the High level If no high bin contains more than 1 25 of the total number of acquired points then the maximum value is returned by these queries Query Syntax MEASure SCALar VOLTage HIGH FETCh SCALar VOLTage HIGH Parameters None Examples MEAS VOLT HIGH FETC VOLT HIGH Returned Parameters lt NR3 gt Related Commands MEAS VOLT LOW CALC REF HIGH 105 8 Language Dictionary MEASure VOLTage LOW FETCh VOLTage LOW These queries return the Low level voltage of a voltage pulse waveform The instrument first measures the minimum and maximum data points of the pulse waveform It then generates a histogram of the pulse waveform using 16 bins between the maximum and minimum data points The bin containing the most data points below the 50 point is the low bin The average of all the data points in the low bin is returned as the Low level If no lo
216. s The VXIplug amp play Power Products instrument driver complies with the following Microsoft Windows 95 Microsoft Windows NT 4 0 HP VISA revision F 01 02 National Instruments VISA 1 1 Downloading and Installing the Driver NOTE Before installing the VXIplug amp play instrument driver make sure that you have one of the supported applications installed and running on your computer Access Agilent Technologies Web site at http www agilent com find drivers Select the instrument for which you need the driver Click on the driver either Windows 95 or Windows NT and download the executable file to your pc te eS Locate the file that you downloaded from the Web From the Start menu select Run lt path gt agxxxx exe where lt path gt is the directory path where the file is located and agxxxx is the instrument driver that you downloaded 5 Follow the directions on the screen to install the software The default installation selections will work in most cases The readme txt file contains product updates or corrections that are not documented in the on line help If you decide to install this file use any text editor to open and read it 6 To use the VXIplug amp play instrument driver follow the directions in the VXIplug amp play online help under Introduction to Programming 62 Introduction to Programming 6 Accessing Online Help A comprehensive online programming reference is provided with the driver It de
217. s either disconnect the power cord or have a qualified electrician install an external switch In position of a bi stable push control Out position of a bi stable push control Caution risk of electric shock Caution hot surface Caution refer to accompanying documents The WARNING sign denotes a hazard It calls attention to a procedure practice or the like which if not correctly performed or adhered to could result in personal injury Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met The CAUTION sign denotes a hazard It calls attention to an operating procedure or the like which if not correctly performed or adhered to could result in damage to or destruction of part or all of the product Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met Declaration Page DECLARATION OF CONFORMITY according to ISO IEC Guide 22 and EN 45014 Manufacturer s Name Agilent Technologies Inc Manufacturer s Address 140 Green Pond Road Rockaway New Jersey 07866 U S A declares that the Product Product Name a Dynamic Measurement DC Source b System DC Power Supply c Remote Front Panel Model Number a Agilent 66311B 66311D 66312A 66111A 66321B 66321D b Agilent 6612B 6611C 6612C 6613C 6614C c Agilent 14575A conforms to the following Product Specifications Safety IEC 1010 1 1990 A1 1992 EN61010 1 1993 EMC CISPR
218. s shown in the Display column may not exactly match the values that appear on the front panel of the unit If you have not already done so connect the power cord to the unit and plug it in Connect the output connector to the back of the unit with the sense jumpers installed Procedure Display Explanation 1 Turn the unit on The dc eee Ea EE During selftest all display segments are briefly lit source undergoes a self test ADDRESS 5 followed by the GPIB Address Ween yOu ESC au 0 000V 0 0001A The display then goes into meter mode with the Dis annunciator on and all others off In Meter mode the n nnnvV digits indicate the output voltage and the nnnnA digits indicate the output current The flashing digit on the display indicates the digit that will be affected if changes are made to the displayed values using the rotary control or the 4X and v keys You will only see the changes if the output is ON NOTE Press the Meter key to exit a menu at any time and return to meter mode If the Err annunciator on the display is on press the Shift key followed by the Error key to see the error number See table 4 1 at the end of this chapter 2 Check that the fan is on You should be able to hear the fan and feel the air coming from the back of the unit 3 Unplug the output connector 0 224V 0 0000A The output voltage indicates approximately 0 2 volts from the back of the unit because the output sense connections have opened 4 Press Outp
219. s the address menu All entries are stored in non volatile memory Display Command Function ADDRESS lt value gt Sets the GPIB Address LANG lt char gt Selects language SCPI REMOTE FP lt char gt Enable disable 14575A front panel interface ON or OFF ROM lt char gt Firmware revision number SN lt char gt Unit serial number Press to place the dc source into a previously stored state You can recall up to 4 previously stored states 0 through 3 Pressing these keys toggles the display between output 1 and output 2 Display Measurement lt reading gt V lt reading gt A Measures output channel 1 lt reading gt V lt reading gt A Measures output channel 2 Press to display the system error codes stored in the SCPI error queue This action also clears the queue If there is no error in the queue 0 is displayed Press to store an existing dc source state in non volatile memory The parameters saved are listed under SAV as described in chapter 8 You can save up to 4 states 0 through 3 Notes value a numeric value char a character string parameter Use and to scroll through the command list Use and to scroll through the parameter list 47 5 Front Panel Operation Function Keys Refer to the examples later in this chapter for more details on the use of these keys FUNCTION Figure 5 3 Function Keys Immediate Action Keys Immediate action keys immediately execute their corresponding functi
220. s the corresponding Status Byte Register bit and all such enabled bits then are logically ORed to cause Bit 6 of the Status Byte Register to be set When the controller conducts a serial poll in response to SRQ the RQS bit is cleared but the MSS bit is not When SRE is cleared by programming it with 0 the dc source cannot generate an SRQ to the controller The query returns the current state of SRE Command Syntax SRE lt NRf gt Parameters 0 to 255 Power on Value see PSC Example SRE 20 Query Syntax SRE Returned Parameters lt NR 1 gt register binary value Related Commands ESE ESR PSC CAUTION _ If PSC is programmed to 0 the SRE command causes a write cycle to nonvolatile memory Nonvolatile memory has a finite maximum number of write cycles Programs that repeatedly cause write cycles to nonvolatile memory can eventually exceed the maximum number of write cycles and cause the memory to fail STB This query reads the Status Byte register which contains the status summary bits and the Output Queue MAV bit Reading the Status Byte register does not clear it The input summary bits are cleared when the appropriate event registers are read The MAV bit is cleared at power on by CLS or when there is no more response data available 136 Language Dictionary 8 A serial poll also returns the value of the Status Byte register except that bit 6 returns Request for Service RQS instead of Master Status Summary MSS
221. scribes how to get started using the instrument driver with Agilent VEE LabVIEW and LabWindows It includes complete descriptions of all function calls as well as example programs in C C and Visual BASIC e To access the online help when you have chosen the default Vxipnp start folder click on the Start button and select Programs Vxipnp Agxxxx Help 32 bit where agxxxx is the instrument driver GPIB Capabilities of the DC Source All de source functions except for setting the GPIB address are programmable over the GPIB The IEEE 488 2 capabilities of the dc source are listed in the Specifications Table in Appendix A GPIB Address The dc source operates from an GPIB address that is set from the front panel To set the GPIB address press the Address key on the front panel and enter the address using the Entry keys The address can be set from 0 to 30 The GPIB address is stored in non volatile memory ADDRESS lt value gt Enter a value to set the GPIB Address Introduction to SCPI SCPI Standard Commands for Programmable Instruments is a programming language for controlling instrument functions over the GPIB SCPI is layered on top of the hardware portion of IEEE 488 2 The same SCPI commands and parameters control the same functions in different classes of instruments For example you would use the same DISPlay command to control the dc source display and the display of a SCPI compatible multimeter Conventions Used in This
222. stance of a cell phone battery which causes the voltage at the phone to drop as the phone draws more current Different types of phone batteries have different internal resistance values which typically fall in a range of several hundred milliohms The internal resistance of a phone battery also changes with age and the number of times the battery is recharged Therefore to evaluate the performance of a cell phone using various battery characteristics use this feature to specify a desired battery resistance Alternatively programmable output resistance can be used to keep the voltage at the phone terminals as constant as possible In this case you may program a negative output resistance This compensates for any additional voltage drop in the load leads between the remote sense points and the phone terminals see Figure 3 4 In phone test fixtures the cell phone terminals may be located up to 50 centimeters away from the connector where the remote sense terminals of the dc source are connected This results in a small voltage drop in the wires between the remote sense terminals and the phone terminals If it is critical that the steady state voltage at the phone terminals be equal to the programmed voltage of the dc source a small negative output resistance can be programmed to compensate for this voltage drop Output 2 Characteristic As shown in the following figure Agilent 66319B D units have a second output rated at 12 V and 1 5A The secon
223. t and DVM input measurements Before you generate a measurement trigger you must specify one of the following measurement functions SENS FUNC CURR or SENS FUNC VOLT or SENS FUNC DVM 81 7 Programming the DC Source Generating Measurement Triggers Single Triggers After you specify the appropriate trigger source and sensing function generate triggers as follows GPIB Triggers Send one of the following commands over the GPIB TRIG IMM not affected by the trigger source setting TRG an IEEE 488 Group Execute Trigger bus command Internal Triggers To trigger off of the output signal you must specify the output level that generates the trigger the rising or falling edge of the slope and a hysteresis to qualify trigger conditions This is illustrated in figure 7 5 for current triggers External Triggers To externally trigger the measurement you must supply either a negative going edge signal or a contact closure to the external trigger input see Appendix A This capability only applies to units with firmware revision A 03 01 and up Trigger occurs on rising edge Trigger occurs on falling edge when signal crosses positive when signal crosses negative hysteresis band limit hysteresis band limit y TRIG ACQ HYST CURR lt value gt TRIG ACQ LEV CURR lt level gt gt TRIG ACQ HYST VOLT lt value gt TRIG ACQ LEV VOLT lt level gt TRIG ACQ SLOP CURR POS Fi TRIG ACQ SLOP VOLT NEG TRIG ACQ S
224. t digits to be returned When REAL is selected the array response format is Definite Length Arbitrary Block Response Data The data within the Arbitrary Block is coded as IEEE single precision floating point with 4 bytes per value The second argument to the FORMat DATA command specifies the number of bits in the returned data Only the value 32 is permitted in dc source instruments The byte order within a single value is determined by the FORMat BORDer command Definite Length Arbitrary Block Response Data format begins with a header that describes the number of data bytes in the response The header begins with a pound sign followed by a single non zero digit that defines the number of digits in the block length followed by the digits contained in the block For example The response to the query MEAS ARR CURR DC 1 which returns 45 numeric values would be as follows 3 1 8 0 lt byte1 gt lt byte2 gt lt byte180 gt lt newline gt Command Syntax FORMat DATA lt type gt length Parameters ASCii REAL RST Value ASCii Examples FORM REAL Query Syntax FORMat Returned Parameters lt CRD gt Related Commands FORM BORD MEAS ARR CURR DC MEAS ARR VOLT DC 100 FORMat BORDer Language Dictionary 8 This command selects whether the binary data is transferred in normal or swapped byte order When NORM al is selected the first byte sent is the sign bit and seven most significant bits of the exponent and the last by
225. t goes into a protect state with the output disabled Check the Operating Settings and Conditions O Are you able to communicate remotely with the dc source If not check that the address is set correctly Refer to GPIB Interface in chapter 2 O Is the Prot or Err annunciator on the front panel on If yes clear the fault condition before continuing Refer to Clearing Output Protection in chapter 5 O Is the Overvoltage circuit shutting the unit down If yes you can disable the overvoltage circuit Refer to Clearing Output Protection in chapter 5 O Is the output load regulation of the unit excessive If yes make sure that the output resistance of the unit is set to zero ohms Refer to Output Resistance in chapter 5 Check the Measurement Settings O Are the front panel readings unstable If yes check that the front panel sampling rate is correct Also check the setting of the output compensation Refer to Making Front Panel Measurements in chapter 5 and Output Compensation in this chapter O Are you measuring dynamic output currents If yes check that the current detector is set to ACDC Refer to Making Front Panel Measurements in chapter 5 O Are you measuring output currents lt 1 A or lt 20 mA If yes check that the current range is set appropriately Refer to Making Front Panel Measurements in chapter 5 25 3 Installation Inspection Damage When you receive your dc source
226. t to 0 then no transition of that bit at the Operation Condition register can set the corresponding bit in the Operation Event register Command Syntax STATus OPERtion NTRansition lt NRf gt STATus OPERtion PTRansition lt NRf gt Parameters 0 to 32767 Preset Value NTR register 0 PTR register 32767 Examples STAT OPER NTR 32 STAT OPER PTR 1312 Query Syntax STAT OPER NTR STAT OPER PTR Returned Parameters lt NR1 gt register value Related Commands STAT OPER ENAB 120 Language Dictionary 8 STATus QUEStionable This query returns the value of the Questionable Event register The Event register is a read only register which holds latches all events that are passed by the Questionable NTR and or PTR filter Reading the Questionable Event register clears it Query Syntax STATus QUEStionable EVENt Parameters None Examples STAT QUES Returned Parameters lt NR1 gt register value Related Commands CLS STAT QUES ENAB STAT QUES NTR STAT QUES PTR Table 8 5 Bit Configuration of Tea Status Registers HBictostin is f a s fi fon ao 9 Bels talere ae Fe Bit Name not Meas not OC2 not UNR rc not SD OT FP not OCP OV x Ovld used used used used sr a ae ome pe Pep OV cae protection has tripped on the main output output 1 OCP overcurrent protection has tripped on the main output output 2 FP the front panel Local key has been depressed OT overtemperature protection has tripped SD opened sense lead de
227. te sent is the least significant byte of the mantissa This ordering is generally used in big endian controllers such as those that use Motorola processors When SWAPped is selected the least significant byte of the mantissa is sent first and the sign bit and seven most significant bits of the exponent are sent last This ordering is generally used in little endian controllers such as those that use Intel processors Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands FORMat BORDer lt type gt NORMal SWAPped NORMal FORM BORD SWAP FORMat BORDer lt CRD gt FORM DATA MEAS ARR CURR DC MEAS ARR VOLT DC MEASure ARRay CURRent FETCh ARRay CURRent These queries return an array containing the instantaneous output current in amps The output voltage or current is digitized whenever a measure command is sent or an acquire trigger occurs The time interval is set by SENSe SWEep TINTerval The position of the trigger relative to the beginning of the data buffer is determined by SENSe SWEep OFFSet The number of points returned is set by SENSe SWEep POINts Query Syntax Parameters Examples Returned Parameters Related Commands MEASure ARRay CURRent DC FETCh ARRay CURRent DC None MEAS ARR CURR FETC ARR CURR lt NR3 gt lt NR3 gt SENS SWE TINT SENS SWE OFFS SENS SWE POIN MEASure ARRay VOLTage FETCh ARRay VOLTage These queries return an array contai
228. tected UNR2 output 2 is unregulated Agilent 66319B D only RI remote inhibit is active UNR the output is unregulated OC2 output 2 overcurrent protection has tripped Agilent 66319B D only Meas Ovld measurement overload STATus QUEStionable CONDition This query returns the value of the Questionable Condition register That is a read only register which holds the real time unlatched questionable status of the dc source Query Syntax STATus QUEStionable CONDition Parameters None Examples STAT QUES COND Returned Parameters lt NR1 gt register value STATus QUEStionable ENABle This command and its query set and read the value of the Questionable Enable register This register is a mask for enabling specific bits from the Questionable Event register to set the questionable summary bit QUES of the Status Byte register This bit bit 3 is the logical OR of all the Questionable Event register bits that are enabled by the Questionable Status Enable register Command Syntax STATus QUEStionable ENABle lt NRf gt Parameters 0 to 32767 Preset Value 0 Examples STAT QUES ENAB 4098 enables OC2 and OCP Query Syntax STATus QUEStionable ENABle Returned Parameters lt NR1 gt register value Related Commands STAT QUES 121 8 Language Dictionary STATus QUEStionable NTR STATus QUEStionable PTR These commands allow you to set or read the value of the Questionable NTR Negative Transition
229. the CAL DATA 0 00 voltage value displayed on the DMM Press Enter 9 Press Shift Cal scroll to CAL LEV use to scroll to P2 the second CAL LEV P2 calibration point and press Enter 10 Press Shift Cal scroll to CAL DATA press Enter Number and enter the CAL DATA 0 00 second voltage value displayed on the DMM Press Enter Agilent 66319B D Output 2 Voltage Programming and Measurement Calibration Action Display 11 Connect the external DMM in voltage mode directly to output 2 Do not connect the load resistor or current shunt Select output 2 12 Press Shift Cal scroll to CAL VOLT2 and press Enter CAL VOLT2 13 Press Shift Cal scroll to CAL LEV and press Enter to select the first CAL LEV P1 calibration point 14 Press Shift Cal scroll to CAL DATA press Enter Number and enter the CAL DATA 0 00 voltage value displayed on the DMM Press Enter 15 Press Shift Cal scroll to CAL LEV use to scroll to P2 the second CAL LEV P2 calibration point and press Enter 16 Press Shift Cal scroll to CAL DATA press Enter Number and enter the CAL DATA 0 00 second voltage value displayed on the DMM Press Enter 157 B Performance Calibration and Configuration Output 1 Current Programming and 3A Range Measurement Calibration NOTE When performing a 3A Range current calibration you must also calibrate the 1A range the 0 02A range and the ac current measurement Action Display 17 Connect the appropriate current m
230. the front panel meter to jitter There are no trigger controls for front panel measurements However you can program both the sampling rate and the number of data points in each front panel measurement using commands in the Input menu With this flexibility measurement accuracy can be improved for waveforms with frequencies as low as several Hertz The sample buffer size may be varied from 1 to 2048 data points in discrete binary values The sampling rate may be varied from 15 6 microseconds to 1 second Values are rounded to the nearest 15 6 microsecond interval Note that the front panel sample interval and buffer size settings are independent of the sample interval and buffer size that you program over the GPIB This is because you can qualify measurement triggers over the GPIB which makes the GPIB measurements independent of the front panel measurements Refer to chapter 8 for more information about GPIB measurements To have the unit turn on with the reconfigured buffer size and sampling rate save this state in location 0 and set the power on state to RCL 0 Note that front panel measurements parameters for output 2 are not programmable They are fixed at 2048 data points with a 15 6 microsecond sampling rate NOTE If the front panel display indicates OVLD the output has exceeded the measurement capability of the instrument If the front panel display indicates an GPIB measurement is in progress Use the Meter menu for
231. the load lead resistance reduces voltage drops V p and Vip AV can be further minimized by decreasing the resistance of the sense leads Rg and Rg as much as possible In situation where AV cannot be minimized any further it may be compensated by programming a negative output resistance as previously discussed Maintaining Stability while Remote Sensing The remote sense bandwidth and slew rate of standard dc power sources are adequate for compensating for load lead voltage drop for slow to moderate rates of load changes However the high pulsed current draw of digital cellular phones presents a challenge to standard dc power sources operating in remote sense mode Their bandwidth and slew rate are not adequate for dealing with the 0 05 to 0 2 amp us slew rates imposed by these devices A large voltage transient occurs at the load due to the inability of the dc source to keep up with the rate of load change The dc source effectively compensates for load lead voltage drops resulting from very high slew rate load current transitions This keeps the remotely sensed output voltage at a relatively constant level For 0 05 amp us to 0 2 amp us slew rate loading in typical test applications the transient voltage is reduced more than an order of magnitude over that of other standard dc sources Open Sense Lead Protection The main output output 1 of the dc source has built in open sense protection circuitry that detects if there is an open in ei
232. the rack manufacturer to obtain support rails for your cabinet Part Number GPIB cables 1 0 meter 3 3 ft Agilent 10833A 2 0 meters 6 6 ft Agilent 10833B 4 0 meters 13 2 ft Agilent 10833C Table 2 2 Accessories 0 5 meters 1 6 ft Agilent 10833D Rack mount with slide for two side by side units of different depths 5062 3996 1494 0015 Rack mount for two side by side units of different depths 5062 3996 Rack mount with slide for one unit 5062 3996 1494 0015 5062 4022 18 General Information 2 Description and Model Differences Agilent 66321B The Agilent 66321B Mobile Communications DC Source is a high performance dc power source that provides peak current sourcing and rapid basic measurements in a compact half rack box It is designed to simplify the testing of digital wireless communications products Excellent voltage transient response characteristics prevent test interruptions due to triggering of low voltage phone shutdown The 15 volt source and 5A peak current capability provides compatibility with a number of communications standards including GSM CDMA TDMA PCS DECT TERA PHS NADC PHS and others Additional capabilities include fast dynamic measurement and analysis of voltage and current waveforms combined with precision current measurement This lets you characterize cellular phone current drain under all operating conditions Programmable output resistance lets you emulate the effects of the intern
233. the two readings should be within the limits specified in the performance test record card under 20mA Range Current Readback 0 A Program the output voltage to 8V and record the current reading on the DMM and the reading on the front panel display If the meter indicates overrange lower the 8 volts slightly The difference between the readings should be within the limits specified in the performance test record card for the appropriate model under 20mA Range Current Readback 20 mA Current Sink CC Operation performance calibration This test verifies current sink operation and readback a Turn off the dc source and connect the output and an external power supply as shown in Figure B 1d using the 400 ohm load resistor Set the DMM to operate in current mode Turn on the dc source and set the current range readback to 0 02A Turn on the external power supply and program it to 8V and 5A Then program the dc source to OV and 1A If the meter indicates overrange lower the voltage of the external supply slightly The UUT display should read approximately 20 mA Record the current reading on the DMM and the reading on the front panel display The difference between the two readings should be within the limits specified in the performance test record card under 20mA Range Current Readback Accuracy 20 mA Turn off the dc source and short out the 400 ohm load resistor by connecting a jumper across it Connect the current monitorin
234. ther the positive or the negative remote sense lead or load lead path For battery powered devices undetected open sense connections can cause incorrect battery charger calibration incorrect test results due to erroneous voltage settings and low voltage phone shutdown due to a large transient voltage drop To enable open sense lead detection from the front panel press the Output key use a to scroll to SENS PROT press to select ON then press Enter To have the unit turn on with open sense detection enabled save this state in location 0 and set the power on state to RCL 0 When this circuit is enabled the sense and load leads are checked every time the output transitions from disabled to enabled off to on If a lead opens while the output is enabled this will not be detected immediately by the open sense circuit However the output voltage will increase or decrease depending on which one of the leads is open Turning the output off then on again will cause the unit to check the output sense and load leads and determine if a sense lead is open If the open sense lead protection circuit detects an open sense lead the Prot annunciator on the front panel turns on and the output turns off Bit 5 in the Questionable Status Registers is also set see chapter 7 under Programming the Status Registers On the front panel press the Prot key and one of the following error messages will be reported on the front panel Message Description sens
235. tion It does not disable the programmable VOLTage PROTection level CAUTION Disabling the overvoltage protection function may cause excessive output voltages such as can occur if remote sense leads are disconnected to damage the equipment under test Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands SOURce VOLTage PROTection STATe lt bool gt 0111OFFION OFF VOLT PROT STAT 0 voltage protection is OFF VOLT PROT STAT 1 voltage protection is ON SOURce VOLTage PROTection STATe lt NR1 gt 0 or 1 OUTP PROT CLE RST VOLT PROT SOURce VOLTage TRIGger This command sets the pending triggered voltage level of the dc source The pending triggered level is a stored voltage value that is transferred to the output terminals when a trigger occurs In order for a trigger to occur the trigger subsystem must be initiated see the INITiate command in the trigger subsystem Command Syntax Parameters Default Suffix RST Value Examples Query Syntax Returned Parameters Related Commands SOURce VOLTage LEVel TRIGgered AMPLitude lt NRf gt see Table 8 3 V volts 0 VOLT TRIG 20 VOLTAGE LEVEL TRIGGERED SOURce VOLTage LEVel TRIGgered AMPLitude lt NR3 gt VOLT VOLT PROT SOURce VOLTage2 TRIiGger Agilent 66319B 66319D only This command sets the triggered voltage level of the auxiliary output The
236. tivement utiliser des fusibles calibr s aux sp cifications de courant tension et type coupure d lai de coupure etc N utilisez jamais de fusibles r par s et ne court circuitez pas les supports de fusibles Sinon vous risquez de provoquer un choc lectrique ou un incendie DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE Do not operate the instrument in the presence of flammable gases or fumes DO NOT REMOVE THE INSTRUMENT COVER Operating personnel must not remove instrument covers Component replacement and internal adjustments must be made only by qualified service personnel Instruments that appear damaged or defective should be made inoperative and secured against unintended operation until they can be repaired by qualified service personnel SAFETY SYMBOLS WARNING Caution Direct current Alternating current Both direct and alternating current Three phase alternating current Earth ground terminal Protective earth ground terminal Frame or chassis terminal Terminal is at earth potential Used for measurement and control circuits designed to be operated with one terminal at earth potential Terminal for Neutral conductor on permanently installed equipment Terminal for Line conductor on permanently installed equipment On supply Off supply Standby supply Units with this symbol are not completely disconnected from ac mains when this switch is off To completely disconnect the unit from ac main
237. triggered level is a stored value that is transferred to the output when a trigger occurs In order for a trigger to occur the trigger subsystem must be initiated see the INITiate command Command Syntax Parameters Default Suffix Examples Query Syntax Returned Parameters Related Commands 118 SOURce VOLTage2 LEVel TRIGgered AMPLitude lt NRf gt see Table A 3 V volts RST Value 0 VOLT2 TRIG 20 SOURce VOLTage2 LEVel TRIGgered AMPLitude lt NR3 gt VOLT2 G 20 VOLT2 LEV TR VOLT2 PROT Language Dictionary 8 Status Commands Status commands program the dc source status registers The dc source has three groups of status registers Operation Questionable and Standard Event The Standard Event group is programmed with Common commands as described later in this section The Operation and Questionable status groups each consist of the Condition Enable and Event registers and the NTR and PTR filters Chapter 7 explains how to read specific register bits and use the information they return STATus PRESet This command sets all defined bits in the Status Subsystem PTR registers and clears all bits in the subsytem NTR and Enable registers Command Syntax STATus PRESet Parameters None Examples STAT PRES STATUS PRESET STATus OPERation This query returns the value of the Operation Event register The Event register is a read only register which holds latches
238. ts the dc source to identify any options that are installed Options are identified by number A 0 indicates no options are installed Query Syntax OPT Returned Parameters lt AARD gt PSC This command controls the automatic clearing at power on of the Service Request Enable and the Standard Event Status Enable registers The query returns the current state of PSC PSC ON 11 causes these registers to be cleared at power on This prevents a PON event from generating SRQ at power on causes the contents of the Standard Event Enable and Service Request Enable registers to be saved in nonvolatile memory and recalled at power on This allows a PON event to generate SRQ at power on PSC OFF 0 Command Syntax PSC lt Bool gt Parameters 0 1 OFF ION Example PSC 0 PSC 1 Query Syntax PSC Returned Parameters lt NR1 gt 0l1 Related Commands ESE SRE CAUTION PSC causes a write cycle to nonvolatile memory Nonvolatile memory has a finite maximum number of write cycles Programs that repeatedly cause write cycles to nonvolatile memory can eventually exceed the maximum number of write cycles and cause the memory to fail 134 RCL Language Dictionary 8 This command restores the dc source to a state that was previously stored in memory with the SAV command to the specified location All states are recalled with the following exceptions the trigger system is set to the Idle state by an implied ABORt command this can
239. ulse waveform lt reading gt A HIGH low level of a current pulse waveform lt reading gt A LOW rms current lt reading gt A RMS 2 To change the front panel time interval and buffer size for output waveform TINT 0 002 measurements press Shift Input Then press V until you obtain the TINT command Use the Entry keys to enter a value from 15 6 microseconds to 1 second in seconds Then press Enter 57 5 Front Panel Operation 3 Continue by pressing Shift Input and V until you obtain the POINT command POINT 1024 Press to select a different buffer size The choices are 1 2 4 8 16 32 64 128 256 512 1024 and 2048 Then press Enter One reason to change the front panel time interval and data points is if the waveform being measured has a period shorter than 3 times the present front panel acquisition time 4 For current measurements press Shift Input Then press W until you obtain the CURR RANG AUTO CURR RANG AUTO command Press Enter to activate autoranging Three other selections are also available Select the 3A range when measuring currents up to 7A Select the 1A range when measuring currents up to 1A Select the 0 02A range for improved resolution when measuring currents below 20 mA Note that the 0 02A range is only appropriate for making dc measurements 5 For output waveform measurements press Shift Input Then press V until you CURR DET ACDC obtain the CURR DET command Check to make sure that the ACDC c
240. unciator will go off indicating that the voltage is now applied to the output terminals The A display indicates the actual output current Note that when the outputs are coupled this command also enables or disables output 2 Display 136V 2 04A 275V 1 04A REL MODE HH Display 8 003V 0 500A 3 Setting the Output 2 Voltage and Current Agilent 66319B 66319D only This example shows you how to set the voltage and current for output 2 Selecting an output was discussed in the previous example Note that no front panel changes affect the output of the unit unless it has been enabled Set the output 2 voltage Action 1 Press Meter then Shift Channel to select output 2 On the Entry keypad press or to select the 1 s digit in the voltage field Then rotate the front panel RPG knob to obtain 7 V If the unit is in CC mode you won t see the output voltage change until the voltage setting is low enough to cause the unit to go into CV mode An alternate way to enter a value On the Function keypad press Voltage On the Entry keypad press Enter Number 7 Enter To make minor changes to an existing value On the Function keypad press Voltage On the Entry keypad press or to select the digit in the numeric field that you wish to change For example move the flashing digit to the ones column to change a value in this column Then press on the Entry keypad to scroll from 7 000 to 8 000 Then press Enter Set the
241. urrent detector is selected This provides the best accuracy for waveform measurements Only select the DC current detector if you are making dc current measurements and you require a dc measurement offset better than 2mA on the High current measurement range Press Enter to activate any changes 7 Making DVM Measurements Agilent 66321D 66319D only The front panel DVM measurement function is only active when Output 1 is selected As shipped from the factory DVM measurements are calculated from a total of 2048 readings taken at a 15 6 microsecond sampling rate These parameters are fixed Therefore the data acquisition time for a single measurement is about 30 milliseconds This sampling rate and data acquisition time combined with a built in windowing function reduces errors due to sampling a non integral number of cycles of a waveform for frequencies of 47 Hz or greater NOTE If the front panel display indicates OVLD the output has exceeded the measurement capability of the instrument If the front panel display indicates a front panel or an GPIB measurement is in progress Check that the DVM measurement points are within the DVM measurement capabilities The common mode voltage range of the DVM input is 4 5 V to 25 V from either DVM input with respect to the negative output terminal of output 1 The maximum isolation voltage to ground is 50 Vdc Refer to chapter 3 under DVM Connection for more information on
242. ut capacitance less than 5 uF 34 Installation 3 OVP Considerations CAUTION Disabling the overvoltage protection circuit may cause excessive output voltages which can damage the phone under test The dc source is shipped from the factory with its overvoltage protection OVP circuit enabled This built in overvoltage protection function is not programmable it is set to automatically trip when the output voltage measured at the sense lead terminals exceeds the programmed voltage by two volts Having the overvoltage and the output voltage sensing at the same point provides a more effective method of load protection than if the overvoltage is sensed only at the output terminals of the dc source To disable the OVP circuit use either the front panel VOLT PROT command located in the OV menu or the VOLTage PROTection STATe SCPI command as explained in chapter 8 The built in overvoltage protection circuit reduces the number of nuisance overvoltage shutdown events since it trips only when the sense lead voltage exceeds the programmed voltage by two volts In situations such as where the external remote sense leads are shorted the OVP circuit will shut down the unit if the voltage measured at the output terminals exceeds the programmed voltage by three volts Lastly the OVP circuit will shut the unit down if the voltage at the output terminals exceeds 18 volts for any reason such as when remote sensing around an excessive load lead resistance
243. ut scroll to SENSE PROT ON Enables the open sense detect circuit SENSE PROT and select ON Press Enter 5 Press Output On Off 0 224V 0 0000A The open sense detect circuit disables the output The Dis annunciator is off but the Prot annunciator is on 6 Press Protect SENSE OPEN Display indicates the protection condition 41 4 Turn On Checkout 10 11 12 13 14 15 16 17 18 Procedure Plug the output connector back into the unit Press Shift Prot Clear Press Voltage Press Enter Number lt 15 gt Enter Press Output On Off Connect a jumper wire across the and output terminals Press Output On Off Press Current Enter Number lt 1 gt Enter Press Shift OCP Press Shift OCP Press Shift Prot Clear Turn the unit off and remove the shorting wire from the output terminals Display NO FAULT VOLT 0 000 VOLT lt 15 gt 15 003V 0 0001A 0 000V 0 0000A 0 004V 3 0712A CURR lt I gt 0 001V 0 0003A 0 001V 0 0003A 0 004V 0 998A Explanation Restores the output sense connections The Prot annunciator is still on Clears the protection condition Prot is off CV is on Display shows the output voltage setting of the unit Programs the main output to 15 volts After the value is entered the display returns to Meter mode Because the output is enabled the meter will indicate the actual output voltage Turn the output off Shorts the
244. ut when an overvoltage overcurrent overtemperature or remote inhibit status condition is detected All conditions that generate the fault must be removed before the latch can be cleared The output is then restored to the state it was in before the fault condition occurred Command Syntax Parameters Examples Related Commands OUTPut PROTection CLEar None OUTP PROT CLE OUTP PROT DEL RCL SAV OUTPut PROTection DELay This command sets the time between the programming of an output change that produces a constant current condition CC and the recording of that condition by the Operation Status Condition register The delay prevents the momentary changes in status that can occur during reprogramming from being registered as events by the status subsystem Since the constant current condition is used to trigger overcurrent protection OCP this command also delays OCP Overvoltage protection is not affected by this command Command Syntax Parameters Unit RST Value Examples Query Syntax Returned Parameters Related Commands OUTPut RI MODE OUTPut PROTection DELay lt NRf gt 0 to 2 147 483 647 seconds 0 08 Normal OUTP PROT DEL 75E 1 OUTPut PROTection DELay lt NR3 gt OUTP PROT CLE CURR PROT STAT RCL SAV This command selects the mode of operation of the Remote Inhibit protection The RI mode is stored in non volatile memory The following modes can be selected LATChing causes a TTL
245. utput resistance This will compensate for the voltage drop in this short section of wire Note that the maximum negative resistance that you can program is 40 milliohms OUTPUT 1 CONNECTOR CAN USE NEGATIVE RESISTANCE PROGRAMMING TO COMPENSATE FOR LEAD RESISTANCE TWIST LEADS ra c gA TWIST PAIR i LENGTH WIRE RESISTANCE FIXTURE MUST BE CONNECTIONS UNDER 50 CM 20 INCHES Figure 3 4 Remote Sense Connections with Test Fixture NOTE The built in overvoltage protection circuit automatically compensates for the voltage drop between the output terminals and the remote sense lead connections Refer to OVP Considerations later in this chapter for more information Load Regulation and Voltage Drop in the Remote Sense Leads The sense leads are part of the dc source s feedback path and must be kept at a low resistance to maintain optimal performance One way to accomplish this is to use larger diameter wires for the sense leads see Table 3 2 If this is impractical you can account for the voltage regulation and readback error that will occur when using higher resistance remote sense leads The voltage load regulation and readback error can be calculated using the following formula AV Vip Cae MUD a ve where Vp and V p are the voltage drops in the and load leads Rs and Rs are the resistances of the and sense leads 31 3 Installation Minimizing
246. voltage to be adjusted up to 6 V can be damaged if the output voltage exceeds 9 volts You can set the programmable voltage limit to 6 volts using either the front panel VOLT PROT command in the OV menu or the VOLTage PROTection SCPI command as explained in chapter 8 If an attempt is then made to program the output voltage to a value greater than 6 volts the unit goes into voltage protection mode and turns its output off NOTE The VOLT PROT front panel and SCPI commands do not program the tracking OVP circuit which automatically tracks the output voltage and trips when the output voltage exceeds the programmed voltage by two volts 35 3 Installation DVM Connections CAUTION The DVM may be damaged if voltages at the input terminals exceed 50 Vdc to ground The DVM connector has three pins plus minus and earth ground The 3 pin connector is removable and accepts wires sizes from AWG 22 to AWG 14 Disconnect the mating plug by pulling it straight back The DVM is designed as an auxiliary measurement input that can measure voltages on circuits that are powered by the main output output 1 Voltage measurements can be made on test points inside the phone under test or on test points located on the test fixture that is connected to the main output Figure 3 6 illustrates a common measurement application for the DVM This example is only provided for illustration your specific application will vary depending on the type of test and type o
247. w bin contains more than 1 25 of the total number of acquired points then the minimum value is returned by these queries Query Syntax MEASure SCALar VOLTage LOW FETCh SCALar VOLTage LOW Parameters None Examples MEAS VOLT LOW FETC VOLT LOW Returned Parameters lt NR3 gt Related Commands MEAS VOLT HIGH CALC REF LOW MEASure VOLTage MAXimum FETCh VOLTage MAXimum These queries return the maximum output voltage Query Syntax MEASure SCALar VOLTage MAXimum FETCh SCALar VOLTage MAXimum Parameters None Examples MEAS VOLT MAX FETC VOLT MAX Returned Parameters lt NR3 gt Related Commands MEAS VOLT MIN MEASure VOLTage MINimum FETCh VOLTage MINimum These queries return the minimum output voltage Query Syntax MEASure SCALar VOLTage MINimum FETCh SCALar VOLTage MINimum Parameters None Examples MEAS VOLT MIN FETC VOLT MIN Returned Parameters lt NR3 gt Related Commands MEAS VOLT MAX 106 Language Dictionary 8 SENSe CURRent DETector This command lets you select the type of detector used for output current measurements Two choices for detecting current measurements are available ACDC This is the preferred choice for all dynamic current measurements When ACDC is selected the measured output current includes the current that flows in the instrument s output capacitor It is especially important to use ACDC detection when measuring pulse or other waveforms wit
248. x Examples Query Syntax Returned Parameters Related Commands SOURce VOLTage2 LEVel IMMediate AMPLitude lt NRf gt see Table A 3 V volts RST Value 0 VOLT2 500mV SOURce VOLTage2 LEVel IMMediate AMPLitude lt NR3 gt VOLT2 TRIG set output2 voltage to 0 5V SOURce VOLTage PROTection This command lets you limit the maximum allowable output voltage that can be programmed either from the front panel or over the GPIB This feature is in addition to the automatic overvoltage protection circuit and is useful in situations where accidentally programming higher output voltages within the operating range of the dc source can permanently damage the phone under test NOTE This command does not program the tracking OVP circuit which automatically tracks the output voltage and trips when the output voltage exceeds the programmed voltage by two volts Also the programmable voltage protection cannot be disabled by VOLTage PROTection STATe Command Syntax Parameters Default Suffix RST Value Examples Query Syntax Returned Parameters Related Commands SOURce VOLTage PROTection LEVel lt NRf gt see Table 8 3 V volts 22 V VOLT PROT 10 set voltage limit to 10V SOURce VOLTage PROTection LEVel lt NR3 gt VOLT VOLT TRIG 117 8 Language Dictionary SOURce VOLTage PROTection STATe This command enables or disables the automatic overvoltage protection tracking OVP func
249. x Parameters RST Value Examples Query Syntax Returned Parameters Related Commands SENSe SWEep POINts lt NRf gt 1 through 4096 2048 SENS SWE POIN 1024 SENSe SWEep POINts lt NR3 gt SENS SWE TINT SENS SWE OFFS MEAS ARR SENSe SWEep TINTerval This command defines the time period between samples The value that you enter for the time interval will be rounded to the nearest 15 6 microsecond increment Command Syntax Parameters RST Value Examples Query Syntax Returned Parameters Related Commands SENSe WINDow SENSe SWEep TINTerval lt NRf gt 15 6 microseconds through 31200 seconds 15 6 microseconds SENS SWE TINT 31 2E 6 SENSe SWEep TINTerval lt NR3 gt SENS SWE POIN SENS SWE OFFS MEAS ARR This command sets the window function that is used in dc and in ac dc rms measurement calculations The following functions can be selected HANNing A signal conditioning window that reduces errors in dc and rms measurement calculations in the presence of periodic signals such as line ripple It also reduces jitter when measuring successive pulse waveforms The Hanning window multiplies each point in the measurement sample by the function cosine Do not use the Hanning window when measuring single shot pulse waveforms RECTangular A window that returns measurement calculations without any signal conditioning This window may be used for pulse measurements where the exact period
250. xamples TRIG SEQ2 LEV DVM 5 TRIG ACQ LEV DVM MAX Query Syntax TRIGger SEQuence2 LEVel DVM TRIGger ACQuire LEVel DVM Returned Parameters lt NR3 gt Related Commands TRIG SEQ2 HYST DVM 129 8 Language Dictionary TRIiGger SEQuence2 LEVel VOLTage TRIGger ACQuire LEVel VOLTage This command sets the trigger level for internally triggered voltage measurements A positive voltage trigger occurs when the voltage level changes from a value less than the lower hysteresis band limit to a value greater than the upper hysteresis band limit Similarly a negative voltage trigger occurs when the voltage level changes from a value greater than the upper hysteresis band limit to a value less than the lower hysteresis band limit Command Syntax TRIGger SEQuence2 LEVel VOLTage lt NRf gt TRIGger ACQuire LEVel VOLTage lt NRf gt Parameters 0 to MAX see table 8 3 Unit V volts RST Value 0 Examples TRIG SEQ2 LEV VOLT 5 TRIG ACQ LEV VOLT MAX Query Syntax TRIGger SEQuence2 LEVel VOLTage TRIGger ACQuire LEVel VOLTage Returned Parameters lt NR3 gt Related Commands TRIG SEQ2 LEV CURR TRIG SEQ2 HYST VOLT TRIGger SEQuence2 SLOPe CURRent TRIGger ACQuire SLOPe CURRent This command sets the slope of an internally triggered current measurement POSitive triggering occurs on the rising edge NEGative triggering occurs on the falling edge EITHer triggering occurs on either edge Command Syntax TRIGg
251. y Syntax TRIGger SEQuence2 HYSTeresis DVM TRIGger ACQuire HYSTeresis DV M Returned Parameters lt NR3 gt Related Commands TRIG SEQ2 LEV DVM TRIGger SEQuence2 HYSTeresis VOLTage TRIGger ACQuire HYSTeresis VOLTage This command defines a band around the trigger level through which the signal must pass before an internal measurement can occur The band limit above and below the trigger level is one half of the hysteresis value added to or subtracted from the trigger level For a positive trigger to occur the excursion of an output waveform in the positive direction must start below the lower hysteresis band limit and pass through the upper hysteresis band limit For a negative trigger to occur the excursion of an output waveform in the negative direction must start above the upper hysteresis band limit and pass through the lower hysteresis band limit Command Syntax TRIGger SEQuence2 HYSTeresis VOLTage lt NRf gt TRIGger ACQuire HYSTeresis VOLTage lt NRf gt Parameters 0 to MAX see table 8 3 Unit V volts RST Value 0 Examples TRIG SEQ2 HYST VOLT 2 TRIG ACQ HYST VOLT 2 Query Syntax TRIGger SEQuence2 HYSTeresis VOLTage TRIGger ACQuire HYSTeresis VOLTage Returned Parameters lt NR3 gt Related Commands TRIG SEQ2 HYST CURR TRIG SEQ2 LEV VOLT 128 Language Dictionary 8 TRIGger SEQuence2 LEVel CURRent TRIGger ACQuire LEVel CURRent This command sets the trigger level for internally triggered current m
252. y the flashing digit is changed by these keys Use the and keys to move the flashing digit e gt These keys move the flashing digit in a numeric entry field to the right or left This lets you increment or decrement a specific digit in the entry field using the and W keys or the RPG knob Used only to access a third level key function the numeric entry keys These third level function keys are labeled in green e 7 e 0 through 9 are used for entering numeric values is the decimal point is the E E minus sign For example to enter 33 6 press Enter Number 3 3 6 Enter The backspace key deletes the last digit entered from the keypad This key lets you correct one or more wrong digits before they are entered This key aborts a keypad entry by clearing the value This key is convenient for correcting a wrong value or aborting a value entry The display then returns to the previously set function This key executes the entered value or parameter of the presently accessed command Until you press this key the parameters you enter with the other Entry keys are displayed but not entered into the de source Before pressing Enter you can change or abort anything previously entered into the display After Enter is pressed the dc source returns to Meter mode 51 5 Front Panel Operation Examples of Front Panel Programming You will find these examples on the following pages 1 Using the front panel displ
253. y varying the measurement parameters you can accurately measure specific portions of an output pulse For example if you set the measurement time to match the pulse width you can measure just the high level of a specific number of output pulses If you increase the measurement time to include the entire waveform you will return measurement data based on the entire waveform To calculate the correct time interval for your measurement simply divide the desired measurement time by the number of points or samples in the measurement NOTE The total number of data points cannot exceed 4096 This means that the count multiplied by the points in each measurement cannot exceed 4096 otherwise an error will occur 83 7 Programming the DC Source Pre trigger and Post trigger Data Acquisition The measurement system lets you capture data before after or at the trigger signal When a measurement is initiated the dc source continuously samples the instantaneous signal level of the sensing function As shown in figure 7 7 you can move the block of data being read into the acquisition buffer with reference to the acquisition trigger This permits pre trigger or post trigger data sampling OFFSET 4095 4096 DATA POINTS OFFSET 2048 4096 DATA POINTS OFFSET 0 4096 DATA POINTS OFFSET 0 to 2 4096 DATA POINTS ACQUISITION TRIGGER Figure 7 7 Pre trigger and Post trigger Acquisition

Agilent Technologies 66319b User's Manual

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