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N6700 User's Guide

1. opc 4 1 SYST ERR QYE__2 4 4 3 DDE 7 8 8 LOGICAL EXE 16 16 OR CME 5 32 32 OUTPUT QUEUE i i PON 4 128 128 QUEUE n NOT STB ong ESR ESE lt n gt EMPTY ESE OPERATION STATUS IDENTICAL REGISTERS FOR EACH CHANNEL SERVICE CONDITION PTR NTR EVENT ENABLE ooo REQUEST 0 GENERATION CV 1 1 1 1 cc 2 2 2 2 LOGICAL CHAN1 OSUM orr 2 4 4 4 4 OR wic 3 8 8 8 8 OSUM meas LOGICAL wic_4 16 16 16 16 CHAN 2 gt oR trans OSUM STAT OPER COND STAT OPER ENAB lt n gt SAME J CHAN3 STAT OPER PTR NTR lt n gt STAT OPER ENAB AS OSUM STAT OPER PTR NTR CHAN 1 CHAN 4 gt STAT OPER EVEN 88 Series N6700 User s Guide Status Subsystem STATus PRESet This command sets all defined bits in the Status system s PTR registers and clears all bits in the NTR and Enable registers Operation Register Questionable Register Preset Settings STAT OPER ENAB STAT QUES ENAB 0 all bits disabled STAT OPER NTR STAT QUES NTR 0 all bits disabled STAT OPER PTR 31 all defined bits enabled STAT QUES PTR 3647 all defined bits enabled STATus OPERtion EVENt lt chanlist gt This query returns the value of the Operation Event register The Event register is a read only register which stores latches all events that are passed by the Operation NTR and or PTR filter Reading the Operation Event register clears it The bit configuration of the Operation status registers is as follows Bit
2. Series N6700 User s Guide 15 Installing the Unit 16 Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 The Agilent N6700 MPS can be mounted in a 19 inch EIA rack cabinet The rack kit parts are listed at the beginning of this chapter Install the rack mount kit as illustrated in the following figure Install eight clip nuts on the rack frame 2 in each corner where your instrument will be located Install the two front rack ears and the two rear extenson brackets on the instrument as shown in the figure Use six M3 x 8mm screws a for the front ears and four M3 x 6mm screws b for the rear brackets Install the two rear rack ears to the back of the instrument rack as shown in the figure Use the four plain 10 32 screws to install the rack ears Slide the unit into the rack making sure that the rear extension brackets align themselves inside the rear rack ear brackets Attach the front rack ears to the front of the instrument rack using the four dress 10 32 screws provided This is optional Insert a 10 32 locking screw through the slot of each extention bracket Attach it with a clip nut Note that this will prevent the unit from being slid out of the front of the rack 9 A 4 Series N6700 User s Guide Connecting the Line Cord Bench Installation Do not block the air intake and exhaust at the sides of the unit or the exhaust at the rear of the unit Refer to the outline diagram in Appen
3. Front Panel Display At a Glance Front Panel Display At a Glance Single channel View Voltage measurement Current measurement 12 5230V 0 1789A E cv se EE zon Press the Meter key to toggle between views S n a Operating mode CV Voltage and Current Remote interface status constant voltage mode settings ALL SRO ERR 10 Multiple channel View Voltage and Current measurements Press the Meter key to toggle between 12 5237 10 234v 3 000v 0 000v views 0 179a O0 341a 0 200a 0 000a The highlighted channel is the active channel Front Panel Keys At a Glance System Keys Meter returns the display to metering mode Menu accesses the command menu Channel selects or highlights a channel to control Back backs out of a menu without activating any changes Help accesses information about the displayed menu control Error displays any error messages in the error queue Navigation Keys The arrow keys let you move around in the command menus The Select key lets you make a selection in the command menus D It also lets you enter edit mode for numeric parameters Output Keys On Off controls the selected output or all outputs when ALL is lit This key is only active in Single channel or Multiple channel view Voltage lets you change the voltage setting of the selected channel Current lets you change the current s
4. 0 1A 5A 0 2A 8 33A 10A 0 Outline Diagram SEINY SESSIN SNE SSSss A d 549 7 mm 21 64 TOP OF UNIT aa jl l 432 5 mm 17 03 482 6 mm k 19 00 gt O E Agilent oO o fal o Series N6700 User s Guide 1 2 Outline Diagram gt gt 1 5 3A Precision Outputs Current A 50 W output 100 W output 571 5 mm 22 5 25 4 mm 1 00 RIGHT SIDE lt gt 44 45 mm 1 75 AIRFLOW 115 B Verification and Calibration Verification 118 Calibration 133 The verification procedures described in this appendix verify that the power system is operating normally and is within published specifications This appendix also includes calibration procedures for the Agilent N6700 MPS Instructions are given for performing the procedures either from the front panel or from a controller over the GPIB Perform the verification tests before calibrating your power system If the power system passes the verification tests the unit is operating within its calibration limits and does not need to be re calibrated Series N6700 User s Guide The recommended calibration interval for Agilent N67xxA DC Power Modules is one year The Agilent N6700A Mainframe does not require calibration 117 Verification Verification Performance Calibration Tests Verification procedures perform two primary functions Tests specif
5. 50 Q BNC termination 2 50 Q 1 8 W termination resistors Adjustable to highest rated input voltage range Power 500 VA Recommended Model Agilent 3458A or equivalent Guildline 9230 15 Vishay NH 250 500 1 Vishay NH 250 250 1 Vishay NH 250 40 1 Agilent N3300A mainframe with N330xA module Agilent 82350B or equivalent Agilent Infiniium or equivalent Rhode and Schwartz Model URE3 or equivalent LaCroy 1855A DA1850A or equivalent Agilent 6813B or equivalent Series N6700 User s Guide Verification Measurement Techniques 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 power system may have to be taken into account Wait statements can be used in the test program if the test system is faster than the power system Current Monitoring R
6. Calibration Switches Normal Two switches control the access to calibration commands The switches are on the carrier board and are accessible by removing the top cover Refer to the Disassembly Instructions in Appendix D Switches 1 and 2 set the calibration configuration as follows Swi Sw2 Description ON ON This is the default or as shipped switch setting The calibration functions are accessible after entering a numeric password The default password is 0 zero Clear password OFF ON The calibration password is reset to 0 when the instrument is first powered on Use this setting if you have forgotten the password Inhibit calibration Series N6700 User s Guide OFF OFF All calibration commands are disabled This is useful where calibration access is guarded by instrument seals 133 Calibration 134 Calibration Procedure Step 1 Step 2 Step 3 Step 4 Step 5 Unless instructed otherwise connect the sense terminal to the output and the sense terminal to the output When calibrating the unit using SCPI commands most calibration steps involve sending a OPC query to synchronize with the power system s command completion before proceeding The response from the instrument must be read each time OPC is given Enable Calibration mode Front Panel SCPI Command Select System Cal State CAL STAT ON lt password gt Enter your password in the Password field and press Select
7. This command sets the delay in seconds that the instrument waits before enabling the specified output It affects all off to on transitions including changes in the OUTPut STATe as well as transitions due to OUTPut PROTection CLEar Delay times can range from 0 to 1 023 seconds in increments of 1 millisecond This command allows multiple output channels to turn on ina controlled manner Each output will not turn on until its delay time has elapsed The RST value 0 OUTPut INHibit MODE LATChing LIVE OFF OUTPut INHibit MODE LATChing LIVE OFF This command selects the mode of operation of the Inhibit input INH The inhibit function shuts down ALL output channels in response to an external signal on the Inhibit input If an output channel has been turned off by OUTPut STATe the inhibit function does not affect the output channel while it is in the OFF state The Inhibit mode setting is stored in non volatile memory The following modes can be selected Causes a logic true transition on the Inhibit input to disable all outputs The outputs remain disabled until the Inhibit input is returned to logic false and the latched INH status bit is cleared by sending the OUTP PROT CLE command or a protection clear command from the front panel Allows the enabled outputs to follow the state of the Inhibit input When the Inhibit input is true the outputs are disabled When the Inhibit input is false the outputs are re enabl
8. ESE lt NRf gt Standard event status enable ESE Return standard event status enable ESR Return event status register IDN Return instrument identification OPC Enable operation complete bit in ESR OPC Return a 1 when operation complete OPT Return option number RCL lt NRf gt Recalls a saved instrument state RST Settings Command RDT RST SAV lt NRf gt SRE lt NRf gt SRE STB TRG TST WAI These settings are set by the RST Reset command Calibration Function Note 1 SCPI Command Summary Description Return output channel descriptions Reset Saves an instrument state Set service request enable register Return service request enable register Return status byte Trigger Performs self test then returns result Pauses additional command processing until all device commands are done CAL STAT OFF Current Function SOUR CURR MIN SOUR CURR MODE FIX SOUR CURR PROT STAT OFF SOUR CURR RANG MAX SOUR CURR TRIG MIN Digital Function SOUR DIG OUTP DATA 0 List Function Note 1 SOUR LIST COUN 1 SOUR LIST CURR MIN SOUR LIST DWEL 0 001 SOUR LIST STEP AUTO SOUR LIST TERM LAST OFF SOUR LIST TOUT BOST OFF SOUR LIST TOUT EOST OFF SOUR LIST VOLT MIN Output Function OUTP OFF OUTP DEL FALL 0 OUTP DEL RISE 0 OUTP PROT COUP OFF Output continued OUTP PROT DEL 0 02 OUTP REL OFF Measurement Function SENS CURR RANG MAX SENS F
9. SCPI Messages Coupled Commands SCPI Messages 62 When commands are coupled it means that the value sent by one command is affected by the settings of another command The following commands are coupled SOURce CURRent and SOURce CURRent RANGe SOURce VOLTage and SOURce VOLTage RANGe If a range command is sent that places an output on a range with a lower maximum setting than the present level an error is generated This also occurs if a level is programmed with a value too large for the present range These types of errors can be avoided by sending the both level and range commands as a set in the same SCPI message For example CURRent 10 1 CURRent RANGe 10 1 lt NL gt will always be correct because the commands are not executed until the message terminator is received Because the range and setting information is received as a set no range setting conflict occurs 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 power system The message which may be sent at any time requests the power system to perform some action A response message consists of data in a specific SCPI format sent from the power system to the controller The power system sends the message only when commanded by a program message query The following figure illustrates the SCPI message structure
10. System Related Operations 46 Self Test A power on self test occurs automatically when you turn on the power system This test assures you that the instrument is operational If the self test is successful the power system will continue to operate normally If the self test fails the Err annunciator comes on Press the Error key to display the list of errors on the front panel Refer to Appendix D for further information Front Panel SCPI Command Cycle power TST Instrument Identification For Agilent N6700A mainframes you can return the model number serial number firmware revision backup firmware active firmware For Agilent N67xxA power modules you can return the model number serial number installed options voltage rating current rating and power rating Front Panel SCPI Command Select System About Frame IDN or SYST CHAN MOD 1 SYST CHAN OPT 1 Select System About Module SYST CHAN SER 1 Series N6700 User s Guide System Related Operations Instrument State Storage The power system has two storage locations in non volatile memory to store instrument states The locations are numbered 0 and 1 Any state previously stored in the same location will be overwritten Front Panel SCPI Command Select States SaveRecall To save a state k SAV lt n In the SaveRecall field enter a Ska location from 0 to 1 and press Select Select Save to save the state or Recall to recall a st
11. The CV annunciator on the front panel must be on If it isn t adjust the load so that the output current drops slightly 5 Adjust the transformer or AC source to the lowest rated line voltage e g 104 Vac for a 115 Vac nominal line voltage input 6 Record the output voltage reading from the DVM 7 Adjust the transformer or AC source to the highest rated line voltage e g 127 Vac for 115 Vac nominal line voltage input 8 Record the output voltage reading on the DVM The difference between the DVM reading in steps 6 and 8 is the source effect which should not exceed the value listed in the test record form for the appropriate model under CV Source Effect CV Ripple and Noise Test category performance Periodic and random deviations in the output combine to produce a residual AC voltage superimposed on the DC output voltage This residual voltage is specified as the rms or peak to peak output voltage in the frequency range specified in Appendix A 1 Turn off the power system and connect the load resistor differential amplifier and an oscilloscope ac coupled to the output as shown in Test Setup figure C Use the 50 load for 50 W outputs use the 25 Q load for 100 W outputs 2 As shown in the diagram use two BNC cables to connect the differential amplifier to the and output terminals Each cable should be terminated by a 50 Q resistor The shields of the two BNC cables should be connected together Connec
12. 46 storing states 47 interface communication 34 items supplied 14 Series N6700 User s Guide LAN interface 35 list arbitrary 52 programming example 102 lists programming 49 load connections 18 location 17 lockout front panel 47 48 M MAV 88 93 measure commands 45 74 MEAS ARR CURR 74 MEAS ARR VOLT 74 MEAS CURR 75 MEAS VOLT 75 measurement trigger generate 58 initiate 58 source 57 measurements arrays 56 converter 56 Hanning window 55 making 45 Rectangular window 55 sample interval 54 simultaneous V and I 45 message terminator 64 end or identify 64 newline 64 message unit separator 64 model differences 9 numbers 14 MSS 87 93 multiple load connections 20 multipliers 65 Series N6700 User s Guide Index N numeric data formats 65 0 OC 90 OFF 89 OPC 92 OPER 93 operating checklist 152 operation status group 87 optional header example 61 options 14 OT 90 outline diagram 15 output enable 29 40 41 noise 22 programming example 100 pulse 50 queue 88 turn on delay 41 output commands 77 OUTP 77 OUTP DEL FALL 77 OUTP DEL RISE 78 OUTP INH MODE 78 OUTP PON STAT 78 OUTP PROT CLE 79 OUTP PROT COUP 79 OUTP PROT DEL 79 OUTP REL 79 output step programming 42 output trigger enable 42 generate 44 initiate 44 level 43 source 43 OV 90 over current protection 41 over voltage protection 41 over voltage protection
13. A trigger is only generated when the state is set to ON BOSTep is an abbreviation for beginning of step The RST value 1 step with a value of OFF SOURce LIST TOUTput EOSTep DATA ON OFF ON OFF lt chanlist gt SOURce LIST TOUTput EOSTep DATA lt chanlist gt 84 This command specifies which list steps generate a trigger out signal at the end of the list step s dwell time Applies only to models with list capability A comma delimited list of up to 512 steps may be programmed The state is either ON 1 or OFF 0 A trigger is only generated when the state is set to ON EOSTep is an abbreviation for end of step The RST value 1 step with a value of OFF Series N6700 User s Guide Source Subsystem SOURce LIST VOLTage LEVel lt volt gt lt volt gt lt list gt SOURce LIST VOLTage LEVel lt chanlist gt This command specifies the voltage setting for each list step in volts Applies only to models with list capability Up to 512 steps may be programmed The values are separated by commas The order in which the values are entered determines the sequence when the list executes The RST value 1 step with a value of MIN SOURce LIST VOLTage POINts lt chanlist gt This query returns the number of points steps in the voltage list not the point values Applies only to models with list capability SOURce STEP TOUTput ON OFF lt chanlist gt
14. CURR PROT STAT OUTP PROT CLE OUTP OUTP 164 Series N6700 User s Guide Compatibility Commands Agilent 662xA Command Description Similar SCPI Command OVCAL lt ch gt Generates error 113 Unit must be calibrated using SCPI commands see Appendix B OVRST lt ch gt Returns the specified output channel to its previous settings after it has OUTP PROT CLE OVSET lt ch gt lt ovpoint gt OVSET lt ch gt PON lt on off gt PON RCL lt reg gt RELAY lt on off gt RELAY RIRST lt ch gt ROM SROM SRO lt setting gt SRQ STO lt reg gt STS lt ch gt TEST UNMASK lt ch gt lt setting gt UNMASK lt ch gt VDATA lt ch gt lt Vlo gt lt Vhi gt VHI lt ch gt VLO lt ch gt been turned off by a protection shutdown Sets the over voltage trip point for the specified output channel Queries the present over voltage setting of the specified output channel The response is a real number Does nothing Always returns a 0 Recalls the settings for all output channels from the specified internal register These settings were previously stored using the STO command RCL programs all output channels in sequential order to these stored settings Generates error 203 This Option 750 capability is not supported Generates error 203 This Option 750 capability is not supported Resets all protection functions for the specified channel This Option
15. SOURce STEP TOUTput lt chanlist gt This command specifies whether an output trigger signal is generated when a transient voltage or current step occurs The state is either ON 1 or OFF 0 A trigger is generated when the state is True The RST value OFF SOURce VOLTage LEVel IMMediate AMPLitude lt value gt MIN MAX lt list gt SOURce VOLTage LEVel IMMediate AMPLitude lt chanlist gt SOURce VOLTage LEVel TRIGgered AMPLitude lt value gt MIN MAX lt list gt SOURce VOLTage LEVel TRIGgered AMPLitude lt chanlist gt These commands set the immediate and the triggered voltage level of the output channel The values are programmed in volts The immediate level is the output voltage setting The triggered level is a stored value that is transferred to the output when a Step transient is triggered Note that the SOURce VOLTage command is coupled with SOURce VOLTage RANGe The RST value MIN SOURce VOLTage MODE FIXed STEP LIST lt chanlist gt SOURce VOLTage MODE lt chanlist gt These commands determine what happens to the output voltage when the transient system is initiated and triggered FiXed The output voltage remains at the immediate value STEP The output goes to the triggered level when a trigger occurs LIST The output follows the programmed list step value when a trigger occurs This function does not apply to all mo
16. To select the trigger polarity DIG PIN lt gt POL lt pol gt Fault Output Pins 1 and 2 can be configured as a fault output pair The polarity of pin 1 can also be configured Front Panel SCPI Command Select System DigPort Pin1 To configure the Fault function DIG PIN1 FUNC FAUL To select the fault output polarity DIG PIN1 POL lt pol gt Select Function and configure the pin as FaultOut Go back one level select Polarity then either Positive or Negative Inhibit Input Pin 3 can be configured as a remote inhibit input The polarity of pin 3 can also be configured Front Panel SCPI Command Select System DigPort Pin3 To configure the Inhibit function DIG PIN3 FUNC INH To select the inhibit input polarity DIG PIN3 POL lt pol gt Select Function and configure the pin as Inhibitln Go back one level select Polarity then either Positive or Negative 148 Series N6700 User s Guide Digital 1 0 Digital Input Series N6700 User s Guide Configuring the Digital Control Port After you have configured pin 3 as the remote inhibit input you must also configure the operating mode of the Inhibit signal The inhibit signal can be latched or live When latched the outputs will remain disabled after an inhibit signal is received When live the outputs will follow the state of the Inhibit input The Inhibit operating mode is stored in non volatile memory Front Panel SCPI Command Select Protec
17. Voltage Programming amp Readback Min Voltage with the load off The CV annunciator should be on and the output current should be close to zero Record the output voltage readings on the digital voltmeter DVM and the front panel display The readings should be within the limits specified in the test record form for the appropriate model under Voltage Programming amp Readback Min Voltage Program the instrument settings as described in the test record form under Voltage Programming amp Readback High Voltage Record the output voltage readings on the DVM and the front panel display The readings should be within the limits specified in the test record form for the appropriate model under Voltage Programming and Readback High Voltage For Agilent Models N6761A and N6762A only Repeat steps 4 5 for the low voltage range Program the the instrument settings as described in the test record form under Voltage Programming amp Readback Low Voltage The readings should be within the limits specified in the test record form for the appropriate model under Voltage Programming and Readback Low Voltage CV Load Effect Test category performance This test measures the change in output voltage resulting from a change in output current from full load to no load 1 Turn off the power system and connect a DVM and an electronic load as shown in Test Setup figure A Turn on the power system and
18. and use the digital port on the back of the instrument Service Appendix D describes what to do if your unit requires service Compatibility Appendix E documents the compatibility commands of the Agilent Series 662xA DC power supplies that are supported by the Agilent N6700 Modular Power System If you have questions relating to the operation of the Agilent N6700 Modular Power System call 1 800 452 4844 in the United States or contact your nearest Agilent Technologies Sales Office The web contains the most up to date version of the manual Go to http www agilent com find N6700 Instrument drivers for Agilent Technologies products are available on the web at http www agilent com find drivers Series N6700 User s Guide Contents 1 Quick Reference 7 The Agilent N6700 Modular Power System At a Glance 8 The Front Panel Ata Glance 10 The Rear Panel Ata Glance 10 Front Panel Display Ata Glance 11 Front Panel Keys At a Glance 11 2 installation 13 General Information 14 Inspecting the Unit 15 Installing the Unit 15 Connecting the Line Cord 17 Connecting the Outputs 18 Remote Sense Connections 22 Parallel Connections 23 Series Connections 24 3 Getting Started 27 Turning the Unit On 28 Selecting an Output Channel 28 Entering an Output Voltage Setting 28 Entering a Current Limit Setting 29 Enabling the Output 29 Using the Front Panel Menu 30 Configuring the Interface34 4 Operating the P
19. setting 30 169 Index PF 90 PON 92 power cord connecting 17 power receptacle 15 pre trigger data 54 print date 2 history 2 PROT 90 protection clearing 42 pulse 50 QUE 92 query description 61 indicator 63 QUES 93 questionable status group 87 R rack mounting 16 Rectangular 55 remote interface factory settings 38 remote sensing description 21 removing modules 153 repackaging 152 repacking 15 reset states 71 response data types 65 root specifier 64 ROS 87 93 safety 3 class 15 warning 15 sample interval 54 SCPI command completion 66 common commands 71 170 device clear 66 header path 60 message structure 62 message unit 63 multiple commands 60 program message 62 response message 62 subsystem commands 68 screen saver front panel 47 self test 46 sense commands SENS CURR RANG 75 SENS FUNC 75 SENS SWE OFFS POIN 75 SENS SWE POIN 76 SENS SWE TINT 76 SENS VOLT RANG 76 SENS WIND 76 sense leads open 22 source commands 80 SOUR CURR IMM 80 SOUR CURR MODE 80 SOUR CURR PROT STAT 80 SOUR CURR RANG 81 SOUR CURR TRIG 80 SOUR DIG INP 81 SOUR DIG OUTP 81 SOUR DIG PIN FUNC 82 SOUR DIG PIN POL 82 SOUR LIST COUN 83 SOUR LIST CURR 83 SOUR LIST DWEL 83 SOUR LIST STEP 84 SOUR LIST TERM LAST 84 SOUR LIST TOUT BOST 84 SOUR LIST TOUT EOST 84 SOUR LIST VOLT 85 SOUR STEP TOUT 85 SOUR VOLT
20. the dwell period are ignored The default dwell time is 0 001 seconds Voltage and current lists can also be configured to generate trigger signals at specified steps This is accomplished by two additional lists a beginning of step BOST and an end of step EOST list These lists define which steps will generate a trigger signal and if the trigger occurs at the beginning or end of the step These trigger signals can be used to synchronize other events with the list When either a voltage or current list is programmed the associated dwell BOST and EOST lists must all be set to the same number of steps otherwise an error will occur when the list is run For convenience a list may be programmed with only one step or value In this case a single step list is treated as if it had the same number of steps as the other lists with all values being equal to the one value List data is not stored in non volatile memory This means that list data that is sent to the instrument either from the front panel or over the bus will be lost when the power system is turned off Series N6700 User s Guide 49 Programming High Speed Test Extensions 50 Program an Output Pulse or Pulse Train Step 1 Step 2 Step 3 Step 4 The following procedure shows how to generate an output pulse train using the List function Trigger LL Off Pulse width gt 4in67 List Count 1 additional pulses Set the voltage or current fu
21. 4 in order to understand how the power system functions Subsystem commands are specific to instrument 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 commands are arranged alphabetically according to the function they perform Common commands are defined by the IEEE 488 2 standard to perform common interface functions They begin with an and consist of three letters command or three letters and a query Common commands are grouped along with the subsystem commands according to the function they perform 67 SCPI Command Summary SCPI Command Summary Subsystem Commands Some optional commands have been included for clarity SCPI Command ABORt AC Quire chanlist TRANsient chanlist CALibrate CURRent LEVel lt NRf gt channel MEASure lt NRf gt channel PEAK channel DATA lt NRf gt DATE lt SPD gt channel DPRog channel LEVel P1 P2 PASSword lt NRf gt SAVE STATE lt Bool gt lt NRf gt VOLTage LEVel lt NRf gt channel CMRR channel MEASure lt NRf gt channel FETCh Note 2 MEASure SCALar CURRent DC chanlist VOLTage DC chanlist ARRay CURRent DC chanlist VOLTage DC chanlist INITiate IMMediate AC Quire chanlist TRANsient chanlist CONTinuous TRANsie
22. AC source to nominal line voltage To ensure that the values read during this test are not the instantaneous measurement of the AC peaks of the output current ripple several DC measurements should be made and averaged If you are using an Agilent 3458A DVM you can set up the voltmeter to do this automatically From the instrument s front panel program 100 power line cycles per measurement Press NPLC 100 ENTER Series N6700 User s Guide Series N6700 User s Guide Verification Turn on the power system and program the instrument settings as described in the test record form under CC Source Effect Set the electronic load for the output channel s voltage under CC Source Effect The CC annunciator on the front panel must be on If it isn t adjust the load so that the output voltage drops slightly Adjust the transformer or AC source to the lowest rated line voltage e g 104 Vac for a 115 Vac nominal line voltage input Divide the voltage drop DVM reading across the current monitoring resistor by its resistance to convert to amps and record this value lout Adjust the transformer or AC source to the highest rated line voltage e g 127 Vac for 115 Vac nominal line voltage input Divide the voltage drop DVM reading across the current monitoring resistor by its resistance to convert to amps and record this value lout The difference between the DVM reading in steps 6 and 8 is the source effect which
23. Constant Current Tests Current Programming amp Readback Minimum Current lout Both 10 mA 30 mA Front Panel Display Readback Both lout 20 mA lout 20 mA High Current lout N6733A 2 4762 A 2 5237 A N6743A 4 9725 A 5 0275 A Front Panel Display Readback N6733A lout 8 75 mA lout 8 75 mA N6743A lout 12 5 mA lout 12 5 mA CC Load Effect Both 2 mA 2 mA CC Source Effect Both 1mA 1 mA Instrument Settings Test Description N6733A N6743A Voltage Programming amp Readback Zero Voltage 20 mV 2 5 A 20 mV 5A Voltage Programming amp Readback High Voltage 20 V 2 5 A 20 V 5A CV Load Effect Source Effect Ripple and Noise 20 V 2 5 A 20 V 5A Transient Response 20 V from 1 75 A to 2 5 A 50 V from 1 A to 2 A Current Programming amp Readback Zero Current 10 mA 20 V 10 mA 20 V Current Programming amp Readback High Current 2 5 A 20 V 5A 20V CC Load Effect Source Effect 2 5 A 20 V 5A 20V Series N6700 User s Guide Verification Test Record Form Agilent N6734A and N6744A Agilent N6734A and N6744A Report No Date Description Model Minimum Specs Results Maximum Specs Constant Voltage Tests Voltage Programming amp Readback Minimum Voltage Vout Both 15 mV 55 mV Front Panel Display Readback Both Vout 35 mV Vout 35 mV High Voltage Vout Both 34 93 V 35 07 V Front Panel Display Readback Both Vout 70 mV Vout 70 mV CV Load Effect Both 4mV 4 mV CV Source Effect Both 4mV 4 mV CV Ri
24. Conventions and Data Formats 64 SCPI Command Completion 66 Device Clear 66 This chapter contains a brief introduction to the SCPI Programming language SCPI Standard Commands for Programmable Instruments is a programming language for controlling instrument functions over the GPIB SCPI provides instrument control with a standardized command syntax and style as well as a standardized data interchange format for various classes of instruments 59 SCPI Commands SCPI Commands SCPI has two types of commands common and subsystem Common commands generally control overall power system 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 power system functions They are organized into an inverted tree 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 ROOT OUTPut m STATe m DELay __ FALL RISE INHibt ___ MODE STATus __ OPERation EE EVEN CONDition 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
25. Current Programming amp Readback Minimum Current lout 10mA 30 mA Front Panel Display Readback lout 20 mA lout 20 mA High Current lout 9 965A 10 035 A Front Panel Display Readback lout 35 mA lout 35 mA CC Load Effect 2 mA 2 mA CC Source Effect 1mA 1 mA Instrument Settings Test Description N6731A Voltage Programming amp Readback Zero Voltage 20 mV 10A Voltage Programming amp Readback High Voltage 5V 10A CV Load Effect Source Effect Ripple and Noise 5V 10A Transient Response 5 V from 5 Ato 10 A Current Programming amp Readback Zero Current 10 mA 5V Current Programming amp Readback High Current 10A 5V CC Load Effect Source Effect 10A 5V Series N6700 User s Guide Verification Test Record Form Agilent N6732A and N6742A Agilent N6732A and N6742A Report No Date Description Model Minimum Specs Results Maximum Specs Constant Voltage Tests Voltage Programming amp Readback Minimum Voltage Vout Both 1mV 39 mV Front Panel Display Readback Both Vout 20 mV Vout 20 mV High Voltage Vout Both 7 973 V 8 027 V Front Panel Display Readback Both Vout 28 mV Vout 28 mV CV Load Effect Both 2 mV ee 2 mV CV Source Effect Both 2 mV 2 mV CV Ripple and Noise peak to peak Both N A 12 mV rms Both N A 2 mV Transient Response Voltage at 200 us Both 80 mV 80 mV Constant Current Tests Current Programming amp Readback Minimum Current lout Both 10mA 30 mA Front
26. Date field If desired you can enter alphanumeric data in this field Select System Cal Save Select Save to save all calibration data Select System Cal State Select Disable to exit calibration mode Change the Calibration Password Front Panel Select System Cal State Enter the original password in the Password field and press Select Select Enable to enable calibration Select System Cal Password Enter a new password in the Password field Select System Cal State Select Disable to exit calibration mode SCPI Command To enter a calibration date CAL DATE lt date gt 1 To save calibration data CAL SAVE To exit calibration mode CAL STAT OFF SCPI Command Enter calibration mode using the original password CAL STAT ON lt password gt To change the password CAL PASS lt NRf gt To exit calibration mode CAL STAT OFF 141 Series N6700 User s Guide C Using the Digital Port Digital Control Port 144 Configuring the Digital Control Port 148 A Digital Control Port consisting of three I O pins is provided to access various control functions Each pin is user configurable The following control functions are available for the I O pins External Trigger Fault Output Inhibit Input Bi directional Digital I O Digital Input only 143 Digital Control Port Digital Control Port A 4 pin connector and a quick disconnect connector plug are provided on each
27. Display Readback Both Vout 110 mV Vout 110 mV CV Load Effect Both 6 mV 6 mV CV Source Effect Both 6mV 6 mV CV Ripple and Noise peak to peak Both N A 20 mV rms Both N A 9 mV Transient Response Voltage at 200 us Both 200 mV 200 mV Constant Current Tests Current Programming amp Readback Minimum Current lout Both 10 mA 30 mA Front Panel Display Readback Both lout 4 mA lout 4 mA High Current lout N6735A 0 7788 A 0 8212 A N6745A 1 5776 A 1 6224 A Front Panel Display Readback N6735A lout 5 2 mA lout 5 2 mA N6745A lout 6 4 mA lout 6 4 mA CC Load Effect Both 2 mA 2 mA CC Source Effect Both 1mA 1 mA Instrument Settings Test Description N6735A N6745A Voltage Programming amp Readback Zero Voltage 20 mV 0 8 A 20 mV 1 6 A Voltage Programming amp Readback High Voltage 50 V 0 8 A 50 V 1 6 A CV Load Effect Source Effect Ripple and Noise 50 V 0 8 A 50 V 1 6 A Transient Response 50 V from 0 4 A to 0 8 A 50 V from 0 8 A to 1 6 A Current Programming amp Readback Zero Current 10 mA 50 V 10 mA 50 V Current Programming amp Readback High Current 0 8 A 50 V 1 6 A 50 V CC Load Effect Source Effect 0 8 A 50 V 1 6 A 50 V Series N6700 User s Guide Calibration Calibration Refer to the Equipment Required section in this appendix for a list of the equipment required for calibration A general outline of the procedure is as follows Enter the calibration mode by provid
28. Glance11 This chapter concisely describes the operation of the Agilent N6700 Modular Power System MPS This chapter does not describe every operating feature in detail It is simply a quick reference guide to quickly become familiar with the essential operating features of the power system A map of the front panel command structure is found in chapter 3 A quick reference programming command chart is included in the beginning of chapter 6 Unless otherwise noted the Agilent N6700 Modular Power System will also be referred to as MPS and power system throughout this manual Series N6700 User s Guide The Agilent N6700 Modular Power System At a Glance The Agilent N6700 Modular Power System At a Glance The Agilent N6700 Modular Power System is a configurable platform that lets you mix and match output modules to create a power system that is optimized for your test system requirements Up to four output modules can be installed in each Agilent N6700A Mainframe Output modules come in power levels of 50 and 100 Watts have various voltage and current combinations and provide the following output performance levels The N675xA High Performance Autoranging DC Power Modules provide low noise high accuracy fast programming times and advanced programming and measurement capabilities to speed test throughput The N676xA Precision DC Power Modules provide precise control and measurements in the
29. N A 30 ppm 40 uV Current high range 60 ppm 3 pA 40 ppm 0 3 uA Current low range lt 0 1 A N A 50 ppm 0 3 uA Output Ripple and Noise PARD CV peak to peak typical 4 mV 4 mV CC rms 2 mA 2 mA Common Mode Noise from 20 Hz 20 MHz from either output to chassis rms 500 uA 500 uA peak to peak lt 2mA lt 2mA Over voltage Protection Accuracy 0 25 250 mV 0 25 250 mV Response time 50 us from occurrence of over voltage condition to start of output shutdown Tf you are operating the unit below 255 uA in constant current mode the output may become unregulated with the following load conditions The load resistance is lt 175 mQ and the load inductance is gt 20 uH If this occurs an UNRegulated flag will be generated and the output current may rise above the programmed value but will remain less than 255 uA 110 Series N6700 User s Guide Supplemental Characteristics Agilent Models N6751A N6752A and N6761A N6762A continued N6751A N6752A N6761A N6762A Maximum Up programming Time with full resistive load time from 10 to 90 of total voltage excursion Voltage setting from 0 V to 10 V 0 2 ms 0 6 ms Voltage setting from 0 V to 50 V 1 5 ms 2 2 ms Maximum Up programming Settling Time with full resistive load time from start of voltage change to within 50mV of final value Voltage setting from 0 V to 10 V 0 5 ms 0 9 ms Voltage setting from 0 V to 50 V 4 0 ms 4 0 ms Maximum Down
30. NL gt In the examples of this guide there is an assumed message terminator at the end of each message SCPI Conventions and Data Formats 64 Conventions Angle brackets lt gt Vertical bar Square Brackets Braces Parentheses The following SCPI conventions are used throughout this guide Items within angle brackets are parameter abbreviations For example lt NR1 gt indicates a specific form of numerical data Vertical bars separate alternative parameters For example VOLT CURR indicates that either VOLT or CURR can be used as a parameter Items within square brackets are optional The representation SOURce VOLTage means that SOURce may be omitted 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 Items within parentheses are used in place of the usual parameter types to specify a channel list The notation 1 3 specifies a channel list that includes channels 1 2 and 3 The notation 1 3 specifies a channel list that includes only channels 1 and 3 Series N6700 User s Guide Data Formats Symbol lt NR1 gt lt NR2 gt lt NR3 gt lt NRf gt lt NRf gt lt Bool gt lt SPD gt Series N6700 User s Guide SCPI Conventions and Data Formats Data progr
31. Panel Display Readback Both lout 10 mA lout 10 mA High Current lout N6732A 6 22062 A 6 27937 A N6742A 9 965A a 10 035 A Front Panel Display Readback N6732A lout 19 37mA lout 19 37 mA N6742A lout 25 mA lout 25 mA CC Load Effect Both 2 mA 2 mA CC Source Effect Both 1mA 1 mA Instrument Settings Test Description N6732A N6742A Voltage Programming amp Readback Zero Voltage 20 mV 6A 20 mV 10A Voltage Programming amp Readback High Voltage 8V 6A 8V 10A CV Load Effect Source Effect Ripple and Noise 8V 6A 8V 10A Transient Response 8 V from 3 A to 6 A 8 V from 5 A to 10 A Current Programming amp Readback Zero Current 10 mA 8 V 10 mA 8 V Current Programming amp Readback High Current 6A 8V 10A 8V CC Load Effect Source Effect 6A 8V 10A 8V Series N6700 User s Guide 129 Verification 130 Test Record Form Agilent N6733A and N6743A Agilent N6733A and N6743A Report No Date Description Model Minimum Specs Results Maximum Specs Constant Voltage Tests Voltage Programming amp Readback Minimum Voltage Vout Both 0 mV 40 mV Front Panel Display Readback Both Vout 20 mV Vout 20 mV High Voltage Vout Both 19 96 V 20 04 V Front Panel Display Readback Both Vout 40 mV Vout 40 mV CV Load Effect Both 2 mV 2 mV CV Source Effect Both 2 mV 2 mV CV Ripple and Noise peak to peak Both N A 14mV rms Both N A 3 mV Transient Response Voltage at 200 us Both 200 mV 200 mV
32. STATus QUEStionable NTRansition lt chanlist gt STATus QUEStionable PTRansition lt chanlist gt These commands set or read the value of the Questionable NTR Negative Transition and PTR Positive Transition registers These registers serve as polarity filters between the Questionable Condition 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 CLS This command causes the following actions on the status system 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 termina
33. The instrument selects the range with the best resolution for the value that is entered When queried the returned value is the maximum voltage that can be output on the range that is presently set This command is coupled with the SOURce VOLTage command This means that if a range command is sent that places an output on range with a lower maximum voltage than the present voltage level an error is generated This also occurs if a voltage level is programmed with a value too large for the present range These types of errors can be avoided by sending the both level and range commands in the same SCPI message When the range and setting information is received as a set no range setting conflict occurs The RST value the highest available range If programming a range value causes a range change to occur while the output is enabled the output will be temporarily disabled while the range switch occurs The transition from on to off and then from off to on will also be delayed by the settings of OUTPut DELay FALL and OUTPut DELay RISE 86 Series N6700 User s Guide Status Subsystem Series N6700 User s Guide Status Subsystem Status register programming lets you determine the operating condition of the power system at any time The power system has three groups of status registers Operation Questionable and Standard Event The Operation and Questionable status groups each consist of the Condition Enable and Event register
34. The Inhibit function is only available on pin 3 Pin 4 is common for pin 3 Pin 3 can be programmed for the following Inhibit modes Causes a logic true transition on the Inhibit input to disable all outputs Allows the enabled outputs to follow the state of the Inhibit input When the Inhibit input is true the outputs are disabled When the Inhibit input is false the outputs are re enabled The Inhibit input is ignored Output channels can only be controlled by the inhibit signal if they have previously been turned on by the OUTPut STATe command or by the front panel On Off switch If an output channel has been turned off it cannot be controlled by the Inhibit signal When an Inhibit signal turns off the outputs the front panel INH status annunciator comes on and the INH bit is set in the Questionable Status Event register To re enable the outputs if the inhibit signal was latched you must clear the protection circuit 145 Digital Control Port Fault Inhibit System Protection The following figure illustrates some ways that you can connect the Fault Inhibit pins of the connector FLT INH FLT INH FLT INH 4231 1234 1231 Fisinin Hilh dill Eee l Input 56 INH Common As shown in the previous figure when the Fault outputs and Inhibit inputs of several mainframes are daisy chained an internal fault condition in one of the ma
35. User s Guide Error in instrument is an error amp vbCrLf amp ErrString List Programming Example 103 Digitizer Programming Example Digitizer Programming Example This program uses the voltage in step mode and also demonstrates how to set up and use the digitizer Sub main List Dim IDN As String Dim GPIBaddress As String Dim ErrString As String Dim channel As String Dim measPoints As Long Dim measOffset As Long Dim Voltage As Double Dim finalVoltage As Double Dim timeInterval As Double Dim VoltPoints As Variant Dim i As Long These variable are neccessary to initialize the VISA COM Dim ioMgr As AgilentRMLib SRMCls Dim Instrument As VisaComLib FormattedI0488 disable button Command1 Enabled False The following command line provides the program with the VISA name of the interface that it will be communication with It is currently set to use GPIB to communicate GPIBaddress GPIBO 5 INSTR This controls the number of points the measurement system measures measPoints 100 This controls the number of points to offset the measurement positive for forward negative for reverse measOffset 0 this sets the time between points timeInterval 0 0025 this variable controls the voltage it can be hard coded into the viPrintf command as well Voltage 5 This is the final voltage that will be triggered finalVoltage 10 This variable can be changed to progra
36. accept calibration commands Calibration password is incorrect The calibration password is incorrect Calibration is inhibited by switch setting Calibration mode is locked out by the calibration switch Bad sequence of calibration commands Calibration commands have not been entered in the proper sequence Unexpected output current The measured output current is outside the acceptable range Zero measurement out of range error The zero measurement value is outside the acceptable range Programming cal constants out of range The programmed calibration constant is outside the acceptable range Measurement cal constants out of range The measurement calibration constant is outside the acceptable range Over voltage cal constants out of range The over voltage calibration constant is outside the acceptable range Wrong V l The instrument was unable to set the correct voltage or current value Aux vioc cal constants out of range Calibration constants on the internal auxiliary local ADC are outside the acceptable range Aux vrem cal constants out of range Calibration constants on the internal auxiliary remote ADC are outside the acceptable range Aux imon cal constants out of range Calibration constants on the internal auxiliary imon ADC are outside the acceptable range Series N6700 User s Guide Error Messages 200 201 202 203 204 205 206 207 302 303 304 305 306 307 308 3
37. appear damaged or defective should be made inoperative and secured against unintended operation until they can be repaired by qualified service personnel CAUTION A CAUTION notice denotes a hazard It calls attention to an operating procedure practice or the like that if not correctly performed or adhered to could result in damage to the product or loss of important data Do not proceed beyond a CAUTION notice until the indicated conditions are fully understood and met A WARNING notice denotes a hazard It calls attention to an operating procedure practice or the like that if not correctly performed or adhered to could result in personal injury or death Do not proceed beyond a WARNING notice until the indicated conditions are fully understood and met Safety Symbols 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 Neutral conductor on permanently installed equipment Line conductor on permanently installed equipment On supply Off supply Standby supply Unit is not completely disconnected from ac mains when switch is off In position of a bi stable push switch Out position of a bi stable push switch Caution risk of electric shock Caution hot surface Caution refer to accompanying descript
38. ch gt lt input gt Generates error 113 None VOUT lt ch gt VRLO lt ch gt VRHI lt ch gt VRSET lt ch gt lt x gt VRSET lt ch gt VSET lt ch gt lt voltage gt VSET lt ch gt VSTEP lt ch gt lt x gt Queries the measured output voltage of the specified output channel The MEAS VOLT response is a real number The front panel display can be used to monitor the measured output voltage and current of the selected output channel Generates error 113 None Generates error 113 None Sets the full scale voltage range programming for an output channel The None power system will select the lowest operating range that will contain the value x If the present operating voltage is greater than the full scale range selected the present output voltage will be reduced to the full scale value of the new range selected If the voltage entered is larger than the highest possible range an error message will result Queries the full scale voltage range setting of an output channel None Sets the voltage of the specified output channel VOLT Queries the present voltage setting of the specified output channel The VOLT response is a real number Increases or decreases the output channel voltage in steps If the step LIST VOLT value lt x gt is positive output voltage will increase by the step value if the step value is negative the output voltage will decrease by the step value Trying to step beyo
39. for more information on programming your power system using SCPI commands The simple examples discussed in this chapter show you how to program output voltage and current functions protection functions internal and external triggers measurement functions system functions This chapter shows what front panel menu controls as well as what SCPI commands are used to perform a particular function Programming examples in the Visual BASIC programming environment are provided in chapter 7 Series N6700 User s Guide 39 Programming the Output Programming the Output Set the Output Voltage Front Panel Press the Channel key to select an output then press the Voltage key Enter a value and press Select SCPI Command To set output 1 to 5 V VOLT 5 1 To set all outputs to 10 V VOLT 10 1 4 For modules with multiple ranges you can select a lower range if you need better output resolution Front Panel Press the Channel key to select an output then press the Voltage key Select Low range and press Select Set the Output Current Front Panel Press the Channel key to select an output then press the Current key Enter a value and press Select SCPI Command To select the lower range program a value that falls within the range VOLT RANG 5 1 SCPI Command To set output 1 to 1 A CURR 1 1 To set all outputs to 2 A CURR 2 1 4 For modules with multip
40. instrument for accessing the five digital control port functions TIGHTEN SCREWS INSERT WIRES io Signal Common The digital control connector accepts wires sizes from AWG 14 to AWG 30 Note that wire sizes smaller than AWG 24 are not recommended Disconnect the connector plug to make your wire connections 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 The following chart describes the possible pin configuration for the available control functions For a complete description of the electrical characteristics of the digital I O port refer to Appendix A Pin External Trigger Fault Inhibit Digital 1 0 1 Trigger In Out FLT Output Input Output 0 2 Trigger In Out FLT Common Input Output 1 3 Trigger In Out INH Input Input Output 2 1i Trigger Common INH Common Signal Common In addition to the configurable pin functions the active signal polarity for each pin is also configurable When Positive polarity is selected a logical true signal is a voltage high at the pin When negative polarity is selected a logical true signal is a voltage low at the pin 144 Series N6700 User s Guide Digital Control Port External Trigger Fault Output Inhibit Series N6700 User s Guide Input LATChing LIVE OFF Any of the Digital Control pins can be programm
41. marks String data not allowed A character string was received but is not allowed for this command Series N6700 User s Guide 160 161 168 170 171 178 200 220 221 222 223 224 225 226 230 231 232 233 240 241 260 261 Error Messages Command Errors continued Block data error Generic block data error Invalid block data The number of data bytes sent does not match the number of bytes specified in the header Block data not allowed Data was sent in arbitrary block format but is not allowed for this command Expression error Generic expression error Invalid expression data The expression data element was invalid Expression data not allowed Expression data element was sent but is not allowed for this command Execution Errors these errors set Standard Event Status register bit 4 Execution error Generic syntax error Parameter error A data element related error occurred Settings conflict A data element could not be executed because of the present instrument state Data out of range A data element could not be executed because the value was outside the valid range Too much data A data element was received that contains more data than the instrument can handle Illegal parameter value An exact value was expected but not received Out of memory The device has insufficient memory to
42. milli and micro ampere region with the ability to simultaneously digitize voltage and current and capture those measurements into an oscilloscope like data buffer The N673xA and N674xA DC Power Modules provide programmable voltage and current measurement and protection features making these economical modules suitable for powering the device under test or system resources such as fixture controls The output and system features are described in the following sections Not all output features are available on every power module The Model Differences section describes the features that apply only to specific power modules Output Features Programmable voltage and current Fast command processing Fast up down programming Fast transient response Low output noise Auto ranging capability Output On Off sequencing Full programming capability is provided for the entire range of output voltage and current Outputs can operate as either constant voltage CV or constant current CC sources Command processing time of less than 1 millisecond per command 1 5 millisecond response time from 10 to 90 of the output rating for auto ranging and precision power modules Refer to Appendix A for details Transient response is less than 100 microseconds for auto ranging and precision power modules Refer to Appendix A for details Output noise is typically 4 mV peak to peak for auto ranging and precision power mo
43. mode Sets the over voltage protection level Enables disables over voltage protection on the selected output Sets the output voltage range Note 4 Returns the value of the operation event register Returns the value of the operation condition register Enables specific bits in the Event register Sets the Negative transition filter Sets the Positive transition filter Presets all enable and transition registers to power on Returns the value of the questionable event register Returns the value of the questionable condition register Enables specific bits in the Event register Sets the Negative transition filter Sets the Positive transition filter Returns the number of output channels in a mainframe Returns the model number of the selected channel Returns the option installed in the selected channel Returns the serial number of the selected channel Specifies the Remote Local state of the instrument Returns the error number and error string Returns the SCPI version number Triggers the measurement immediately Note 2 Sets the measurement trigger source Note 2 Triggers the output immediately Sets the output trigger source Note 2 Only applies to Models N6761A N6762A and Models N6751A N6752A with Test Extensions Option 054 Note 3 Only applies to Models with Output Relay Option 761 Note 4 Only applies to Models N6761A and N6762A 70 Series N6700 User s Guide Common Commands Command Description CLS Clear status
44. more waveform cycles are in the measurement 55 Programming High Speed Test Extensions 56 To select a window function use Front Panel SCPI Command Select Measure Window To set the sense window to Hanning Then select either Rectangular or for output 1 use Hanning and press Select SENS WIND HANN 1 Retrieve Measurement Array Data Array queries return all values in the voltage and current measurement buffer No averaging is applied only raw data is returned from the buffer The following commands initiate and trigger a measurement and return the measurment array Front Panel SCPI Command Not Available MEAS ARR VOLT 1 4 MEAS ARR CURR 1 4 Once a measurement finishes you may wish to retrieve the array data without initiating a new measurement Use FETCh queries to return the array data from the last meausrement Fetch queries do not alter the data in the measurement buffer The commands are Front Panel SCPI Command Not Available FETC ARR VOLT 1 4 FETC ARR CURR 1 4 If a FETCh query is sent before the measurement is started or before it is finished the response will be delayed until the measurement trigger occurs and the acquisition completes This may tie up the computer if the measurement trigger does not occur immediately Synchronizing Digitizer Measurements Use the measurement trigger system to synchronize the acquisition of measurements with either a Bus Transient or an
45. previously stored in memory locations 0 through 1 with the SAV command All instrument states are recalled with the following exceptions The trigger system is set to the Idle state by an implied ABORt command this cancels any uncompleted trigger actions Calibration is disabled by setting CALibration STATe to OFF Al list settings are set to their RST values All status registers are set to their PRESet values The device state stored in location 0 is automatically recalled at power turn on when the Output Power On state is set to RCL 0 Series N6700 User s Guide 95 System Commands RDT RST SAV lt state gt TST CAUTION This query returns a description of the output channels installed in a mainframe Semicolons separate multiple channel descriptions Field Information CHAN lt c gt Channel number description Description of the output channel This command resets the volatile memory of the power system to a factory defined state see RST Settings at the beginning of this chapter RST also forces the ABORt ACQuire and ABORt TRANsient commands This cancels any measurement or output trigger actions presently in process and resets the two WTG bits in the Status Operation Condition register 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 eventua
46. programming Time with no load time from start of voltage change to output voltage lt 0 5 V Voltage setting from 10 V to 0 V 0 3 ms 0 3 ms Voltage setting from 50 V to 0 V 1 3 ms 1 3 ms Maximum Down programming Settling Time with no load time from start of voltage change to output voltage within 50mV of final value Voltage setting from 10 V to 0 V 0 45 ms 0 45 ms Voltage setting from 50 V to 0 V 1 4 ms 1 4 ms Down programming Time with 1000 pF load NOTE 2 time from start of voltage change to output voltage lt 0 5 V Voltage setting from 10 V to 0 V 2 1 ms 4 5 ms Voltage setting from 50 V to 0 V 11 ms 23 ms Down programming Capability Continuous power 7W 7W Peak current 7A 3 8A Remote Sense Capability Outputs can maintain specifications with up to a 1 volt drop per load lead Series and Parallel Operation Similarly rated outputs can be operated directly in parallel or can be connected for straight series operation Auto series and auto parallel operation is not available Load Cross Regulation Voltage from no load to full load 1 mV 0 5 mV Current from no load to full load 1mA 5 uA Modules can discharge a 1000uF capacitor from 50V to OV at a rate of 4 times second Series N6700 User s Guide 111 Supplemental Characteristics Agilent Models N6731A N6735A and N6742A N6745A N6731A N6732A N6742A N6733A N6743A N6734A N6744A N6735A N6745A Programming Ranges Voltage 20 mV 5 1V 2
47. samples are acquired The RST value 0 Series N6700 User s Guide 75 Measurement Subsystem SENSe SWEep POINts lt points gt MIN MAX lt chanlist gt SENSe SWEep POINts lt chanlist gt This command defines the number of points in a measurement on models that have measurement controls Programmed values can range from 1 to 4096 The RST value 1024 SENSe SWEep TINTerval lt interval gt MIN MAX lt chanlist gt SENSe SWEep TINTerval lt chanlist gt This command defines the time period between samples in seconds on models that have measurement controls Programmed values can range from 0 00002048 to 40000 seconds Values are rounded to the nearest 20 48 microsecond increment The RST value 20 48 microseconds SENSe VOLTage DC RANGe UPPer lt value gt MIN MaAx lt chanlist gt SENSe VOLTage DC RANGe UPPer lt chanlist gt This command selects a DC voltage measurement range on models that have multiple ranges The programmed value must be the maximum voltage that you expect to measure Units are in volts The instrument selects the range with the best resolution for the value entered When queried the returned value is the maximum DC voltage that can be measured on the range that is presently set Refer to Appendix A for the available ranges for each model The RST value the highest available range SENSe WINDow TYPE HANNing RECTangular lt chanlist gt SENSe WI
48. shunt resistor to an output channel Connect the DVM to measure the voltage across the shunt The shunt resistor should be able to measure at least 120 of the channel s rated full scale current Step 2 Select the full scale current programming range The following Step 3 Step 4 Step 5 Step 6 example selects the 10 amp full scale current programming and measurement range of channel 1 The value to program a range must be the maximum current of the range Front Panel SCPI Command Select CAL CURR 10 1 System Cal Sequences Iprog Then select the High range Select the first current calibration point Front Panel SCPI Command Select Next The information field CAL LEV P1 should indicate Enter P1 data OPC Calculate the shunt current 1 V R and enter the data Front Panel SCPI Command Select the Measured Data field Enter CAL DATA lt data gt the data from the external DVM Press Select when done Select the second current calibration point Front Panel SCPI Command Select Next The information field CAL LEV P2 OPC should indicate Enter P2 data Calculate the shunt current I V R and enter the data Front Panel SCPI Command Select the Measured Data field Enter CAL DATA lt data gt the data from the external DVM Press Select when done Press Next to finish calibration 137 Calibration 138 Low Range Current Programming Calibration This only applies to Agilent Mo
49. the measurement system When the trigger system is initiated a measurement trigger causes the power system to measure the output voltage or current and store the results in a buffer The measured quantity voltage or current is specified by the SENSe FUNCtion command TRIGger ACQuire SOURce BUS PIN lt pin gt TRANsient lt chan gt lt chanlist gt TRIGger ACQuire SOURce lt chanlist gt This command selects the trigger source for the measurement trigger system The following trigger sources can be selected Series N6700 User s Guide 97 Trigger Subsystem BUS PIN lt pin gt TRANsient lt chan gt GPIB device trigger TRG or lt GET gt Group Execute Trigger Selects an output port connector pin Pins 1 3 can be configured as external trigger sources The SOURce DIGital PIN lt n gt FUNCtion command programs the function of each pin The SOURce DIGital PIN lt n gt POLarity command programs the polarity of each pin Selects the transient system of one of the output channels as the external trigger source The following commands are used to generate triggers from the transient system SOURce STEP TOUTput SOURce LIST TOUTput BOSTep and SOURce LIST TOUTput EOSTep The RST value BUS TRIGger TRANsient IMMediate lt chanlist gt This command generates an immediate transient trigger regardless of the selected trigger source Output triggers affect the following functions voltage current a
50. the subroutine for each example Series N6700 User s Guide Microsoft and Visual BASIC and Windows are U S registered trademarks of Microsoft Corporation Output Programming Example Output Programming Example This is a simple program that sets a voltage current overvoltage and the status of over current protection When done the program checks for instrument error and gives a message if there is an error Sub main List 100 Dim IDN As String Dim GPIBaddress As String Dim ErrString As String This variable controls the channel number to be programmed Dim channel As String This variable controls the voltage Dim VoltSetting As Double This variable measures the voltage Dim MeasureVoltSetting As Double This variable controls the current Dim CurrSetting As Double These variables control the over voltage protection settings Dim overVoltOn As Long Dim overVoltSetting As Double These variables control the over current protection Dim overCurrentOn As Long Dim ocercurrentSetting As Double These variable are neccessary to initialize the VISA COM Dim ioMgr As AgilentRMLib SRMC1s Dim Instrument As VisaComLib FormattedI0488 Dim ioAddress As String The following command line provides the program with the VISA name of the interface that it will be communication with It is currently set to use GPIB to communicate GPIBaddress GPIBO 5 INSTR Use the following line for LAN co
51. three remote interfaces that are provided on the back of the instrument 27 Turning the Unit On Turning the Unit On After you have connected the line cord turn the unit on with the front panel power switch The front panel display will light up after a few seconds A power on self test occurs automatically when you turn the unit on This test assures you that the instrument is operational If the self test fails the Err annunciator comes on Press the Error key to display the list of errors on the front panel Refer to Appendix D for further information When the front panel display appears you can use the front panel controls to enter voltage and current values Selecting an Output Channel Channel Press the Channel key to select the output channel that you wish to program Entering an Output Voltage Setting Method 1 Use the Navigation and Arrow Keys Navigation Keys Use the left and right navigation keys to navigate to the setting that you wish to change In the display below channel 1 s voltage setting is selected Enter a value using the numeric keypad Then press Enter E 0 0000V 0 0000A Set o coooa Arrow Keys You can also use the arrow keys to adjust the value up or down When the ry output is on and the unit is operating in CV mode the output voltage changes immediately Otherwise the value will become effective when the output is turned on Method 2 Use the Volt
52. triggerd actions Initiate commands initialize the trigger system This enables the trigger system to receive triggers Trigger commands control the remote triggering of the power system They specify the trigger source for the transient and the measurement system and also generate software triggers ABORt ACQuire lt chanlist gt ABORt TRANsient lt chanlist gt These commands cancel any measurement or transient trigger actions presently in process The two WTG bits in the Status Operation Condition register are also reset These commands are executed at power on and upon execution of RST INITiate IMMediate ACQuire lt chanlist gt INITiate IMMediate TRANsient lt chanlist gt These commands control the enabling of both measurement and transient triggers When a trigger is initiated an event on a selected trigger source causes the specified triggering action to occur If the trigger system is not initiated all triggers are ignored INITiate CONTinuous TRANsient ON OFF lt chanlist gt INITiate CONTinuous TRANsient lt chanlist gt This command continuously initiates the output trigger system The enabled state is ON 1 the disabled state is OFF 0 With continuous triggering disabled the output trigger system must be initiated for each trigger using the INITiate TRANsient command The RST value OFF TRIGger ACQuire IMMediate lt chanlist gt This command sends an immediate trigger to
53. voltages in the range of 100 Vac to 240 VAC The frequency can be either 50 Hz or 60 Hz The detachable power cord may be used as an emergency disconnecting device Removing the power cord will disconnect ac input power to the unit Series N6700 User s Guide 17 Connecting the Outputs Connecting the Outputs WARNING SHOCK HAZARD Turn off AC power before making rear panel connections All wires and straps must be properly connected with the terminal block screws securely tightened Disconnect the connector plug to make your wire connections The connector accepts wires sizes from AWG 12 to AWG 30 Note that wire sizes smaller than AWG 20 are not recommended Each connector has four openings for attaching wires see figure below Load connections are made at the and terminals Sense connections are made on the s and s terminals Securely fasten the wires by tightening the screw terminals After your wires are securely connected insert the connector plug into the back of the unit and secure it by tightening the locking screws A chassis ground binding post is available next to the AC input connector for your convenience TIGHTEN SCREWS CONNECTOR PLUG SHOWN S S Ah ah LOCKING SCREW mA _ rl o S INSERT WIRES oS SENSE JUMPERS INSTALLED FOR LOCAL SENSING TWIST LEADS _ LOAD 18 Series N6700 User s Guide Wire Size Connecting the Outputs FIRE HAZARD Selec
54. when All commands sent before OPC including paralleled commands have been completed Most commands are sequential and are completed before the next command is executed Commands that affect output voltage current or state relays and trigger actions are executed in parallel with subsequent commands OPC provides notification that all parallel commands have completed All triggered actions are completed OPC does not prevent processing of subsequent commands but the OPC bit 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 OPC does not suspend processing of commands Series N6700 User s Guide SRE SRE STB WAI Series N6700 User s Guide Status Subsystem This command sets the value of the Service Request Enable Register This register determines which bits from the Status Byte Register are summed 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 enables the corresponding Status Byte Register bit All such enabled bits are then logically ORed to cause the MSS bit 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 power system cannot ge
55. 0 1 enter a voltage value Press Select Repeat this for each step Use the t keys to select the next step Step 3 Determine the time interval in seconds that the output remains at each step in the list before it advances to the next step To specify the six dwell intervals in the figure a list may include the following values 2 3 5 3 7 3 Front Panel SCPI Command Select Transient List Config To program output 1 use Select the List Step number and LIST DWEL 2 3 5 3 7 3 1 enter a dwell value Press Select Repeat this for each step Use the t keys to select the next step The number of dwell steps must equal the number of voltage steps If a dwell list has only one value that value will be applied to all steps in the list Step 4 Determine how the list is paced To pace the list by dwell time set the list pacing to Dwell paced on the front panel menu Set the LIST STEP command to AUTO As each dwell time elapses the next step is immediately output Series N6700 User s Guide Programming High Speed Test Extensions Front Panel Select Transient List Pace Select Dwell paced Press Select SCPI Command LIST STEP AUTO 1 In a trigger paced list the list advances one step for each trigger received To enable trigger paced lists select Trigger paced on the front panel menu Set the LIST STEP command to ONCE The dwell time associated with each step determines the minimum time that the
56. 0 expected lt n1 gt to lt n2 gt measured lt n3 gt chan lt n4 gt Auxiliary ADC failed n1 and n2 are the expected limits n3 is the measured value n4 is the channel location of the failed module 202 Selftest Fail DACs 0 expected lt n1 gt to lt n2 gt measured lt n3 gt chan lt n4 gt Both voltage and current DACs are at zero n1 and n2 are the expected limits n3 is the measured value n4 is the channel location of the failed module 202 Selftest Fail DACs 1 expected lt n1 gt to lt n2 gt measured lt n3 gt chan lt n4 gt Voltage DAC is at zero current DAC is at full scale n1 and n2 are the expected limits n3 is the measured value n4 is the channel location of the failed module 202 Selftest Fail DACs 2 expected lt n1 gt to lt n2 gt measured lt n3 gt chan lt n4 gt Voltage DAC is at full scale current DAC is at zero n1 and n2 are the expected limits n3 is the measured value n4 is the channel location of the failed module 202 Selftest Fail DACs 3 expected lt n1 gt to lt n2 gt measured lt n3 gt chan lt n4 gt Both voltage and current DACs are at full scale n1 and n2 are the expected limits n3 is the measured value n4 is the channel location of the failed module 160 Series N6700 User s Guide E Compatibility Differences In General 162 Compatibility Command Summary 163 The Agilent N6700 MPS is programmatically compatible with the Agilent 6621A 6629A DC power supplies This mean
57. 0 mV 8 16 V 20 mV 20 4 V 20 mV 35 7 V 20 mV 51V Current 10 mA 10 2A 10 mA 6 375 A 10 mA 2 55 A 10 mA 1 53 A 10 mA 0 816 A 10 mA 10 2A 10 mA 5 1A 10 mA 3 06A 10 mA 1 63 A Programming Resolution Voltage 3 5 mV 4 mV 5 mV 9 mV 13 mV Current 5 mA 3 25 mA 3 25 mA 3 25 mA 3 25 mA Measurement Resolution Voltage 3 mV 4 mV 10 mV 18 mV 30 mV Current 10 mA 7 mA 3 mA 2 mA 1 mA Output Ripple and Noise PARD CC rms 8 mA 4 mA 2 mA 2 mA 2 mA Common Mode Noise from 20 Hz 20 MHz from either output to chassis Rms 1mA 1mA 1mA 1mA 1mA peak to peak lt 10mA lt 10mA lt 10mA lt 10mA lt 10mA Over voltage Protection Accuracy 0 25 250 mV 0 25 250 mV 0 25 250 mV 0 25 250 mV 0 25 300 mV Response time 50 us from occurrence of over voltage condition to start of output shutdown Maximum Up programming and Down programming Time with full resistive load time from 10 to 90 of total voltage excursion Voltage setting from 0 V to 10 ms 10 ms 10 ms 10 ms 10 ms full scale and full scale to 0V Maximum Up programming and Down programming Settling Time with full resistive load time from start of voltage change until voltage settles within 0 1 of the full scale voltage of its final value Voltage setting from 0 V to 100 ms 100 ms 100 ms 100 ms 100 ms full scale and full scale to 0V Remote Sense Capability Outputs can maintain specifications with up to a 1 volt drop per load lead Series and Parallel Oper
58. 09 Device dependent Errors continued Hardware error channel lt channel gt A hardware error has occurred on the specified channel Invalid configuration empty slots There is an empty slot between modules This configuration is not allowed Selftest Fail A selftest failure has occurred See selftest failure list for details Compatibility function not implemented The requested compatibility function is not available NVRAM checksum error A checksum error has occurred in the instrument s nonvolatile random access memory NVRAM full The nonvolatile random access memory of the instrument is full File not found The internal calibration file or the internal channel attribute file was not found in NVRAM Cal file version error The calibration file was written or read using old firmware Firmware must be updated Option not installed The option that is programmed by this command is not installed There is not a valid acquisition to fetch from There is no valid data in the measurement buffer Volt and curr in incompatible transient modes Voltage and current cannot be in Step and List mode at the same time A triggered value is on a different range A triggered value is on a different range than the one that is presently set Too many list points Too many list points have been specified List lengths are not equivalent One or more lists are not the same length This setting cannot be changed while transient trigger is init
59. 750 capability is supported Queries the revision of the power system s firmware Queries the revision of the power system s firmware Does nothing Always returns a 0 Stores the present settings for all output channels in the specified register These settings can be recalled when desired Queries the present status of the specified output channel The response represents the sum of the binary weights of the status register bits Always returns a 0 Sets the bits in the mask register of the specified output channel to the setting The setting is an integer that represents the sum of the binary weights of the bits The mask register operates in conjunction with the status and fault registers Queries the present setting of the mask register of the specified output channel The response is an integer from 0 to 255 Generates error 113 Unit must be calibrated using SCPI commands Generates error 113 Generates error 113 VOLT PROT LEV VOLT PROT LEV SRE SRE RCL None None OUTP PROT CLE IDN IDN SRQ SRQ SAV STAT OPER COND STAT QUES COND TST STAT OPER NTR STAT OPER PTR STAT QUES NTR STAT QUES PTR STAT OPER NTR STAT OPER PTR STAT QUES NTR STAT QUES PTR see Appendix B None None Series N6700 User s Guide 165 Compatibility Commands Agilent 662xA Command Description Similar SCPI Command VMUX lt
60. Agilent Technologies Modular Power System Series N6700 User s Guide ote Agilent Technologies Legal Notices Agilent Technologies Inc 2003 2004 No part of this document may be photocopied reproduced or translated to another language without the prior agreement and written consent of Agilent Technologies Inc as governed by United States and international copyright laws The material contained in this document is provided as is and is subject to being changed without notice in future editions Further to the maximum extent permitted by applicable law Agilent disclaims all warranties either express or implied with regard to this manual and any information contained herein including but not limited to the implied warranties of merchantability and fitness for a particular purpose Agilent shall not be liable for errors or for incidental or consequential damages in connection with the furnishing use or performance of this document or of any information contained herein Should Agilent and the user have a separate written agreement with warranty terms covering the material in this document that conflict with these terms the warranty terms in the separate agreement shall control Manual Editions Manual Part Number 5969 2908 Third Edition February 2004 Printed in Malaysia Reprints of this manual containing minor corrections and updates may have the same printing date Revised editions are identif
61. Built in Web server SCPI 1993 IEEE 488 2 compliant interface Requires Agilent 1 0 Library version M 01 01 04 Requires Agilent 1 0 library version L 01 01 Requires Internet Explorer 5 or Netscape 6 2 Environmental Conditions Operating environment Temperature range Relative humidity Altitude Storage temperature Indoor use installation category II for AC input pollution degree 2 0 C to 55 C output derated above 40 C Up to 95 Up to 2000 meters 30 C to 70 C Series N6700 User s Guide 113 Supplemental Characteristics Agilent N6700A MPS Mainframe N6700A Regulatory Compliance EMC Safety Complies with the European EMC directive 89 336 EEC for Class A test and measurement products Complies with the Australian standard and carries the C Tick mark This ISM device complies with Canadian ICES 001 Cet appareil ISM est conforme a la norme NMB 001 du Canada Electrostatic discharges greater than 1 kV near the 1 0 connectors may cause the unit to reset and require operator intervention Complies with the European Low Voltage Directive 73 23 EEC and carries the CE marking This product also complies with the US and Canadian safety standards for test and measurement products Acoustic Noise 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 Norm
62. C 61000 3 2 Amd 2 1998 EN 61000 3 2 1995 Harmonic Current Emission per std Amd 1 2 1998 A14 2000 IEC 61000 3 3 1994 A1 2001 EN 61000 3 3 1995 A1 Voltage Fluctuations and Flicker per Canada ICES 001 1998 std Australia New Zealand AS NZS 2064 1 The product was tested in a typical configuration with Agilent Technologies test systems Safety IEC 61010 1 2001 EN 61010 1 2001 Canada CSA C22 2 No 1010 1 1992 UL 61010B 1 2003 Supplementary Information This DoC applies to above listed products placed on the EU market after January 1 2004 Bi f Date Bill Darcy Product regulations manager For further information please contact your local Agilent Technologies sales office agent or distributor or Agilent Technologies Deutschland GmbH Herrenberger Stra e 130 D 71034 B blingen Germany Template A5971 5302 2 Rev B 00 Document number DoC Revision
63. Channel Data Message Unit Query Indicator Keywords J m Space VOLT LEV 10 1 PROTON 1 CURR 1 lt NL gt Keyword Separator Message Terminator Message Unit Separators Root Specifier Series N6700 User s Guide SCPI Messages 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 1 Channel List Parameter The channel parameter is required to address one or more channels It has the following syntax lt channel gt lt channel gt lt channel gt lt channel gt You can also specify a range of sequential channels as follows lt start_channel gt lt end_channel gt For example 2 specifies channel 2 and 1 3 specifies channels 1 through 3 A maximum of 4 channels may be specified through a combination of single channels and ranges Query results are channel list order sensitive Results are returned in the order they are specified in the list When adding a channel list parameter to a query you must include a space character between the query indicator and the channel list parameter Otherwise error 103 Invalid separator will occur Headers Headers also referred to as keywords are instructions recognized by the power system Headers may be in the l
64. Current Divide the voltage drop DVM reading across the current shunt by the shunt resistance to convert to amps and record this value out Also record the current reading on the front panel display The readings should be within the limits specified in the test record form for the appropriate model under Current Programming and Readback High Current For Agilent Models N6761A and N6762A only Repeat steps 4 5 for the low current range Program the instrument settings as described in the test record form under Current Programming amp Readback Low Current The readings should be within the limits specified in the test record form for the appropriate model under Current Programming and Readback Low Current 123 Verification 124 CC Load Effect Test category performance This test measures the change in output current resulting from a change in output voltage from full scale to short circuit 1 Turn off the power system and connect the current shunt DVM and electronic load as shown in Test Setup figure B Connect the DVM directly across the current shunt To ensure that the values read during this test are not the instantaneous measurement of the AC peaks of the output current ripple several DC measurements should be made and averaged If you are using an Agilent 3458A DVM you can set up the voltmeter to do this automatically From the instrument s front panel program 100 power line cycl
65. Guide 7 Programming Examples Output Programming Example 100 List Programming Example 102 Digitizer Programming Example104 This chapter contains several example programs to help you develop programs for your own application The example programs are for illustration only and are provided with the assumption that you are familiar with the programming language being demonstrated and the tools used to create and debug procedures See Chapter 6 Language Dictionary for the SCPI comand syntax You have a royalty free right to use modify reproduce and distribute the example programs and or any modified version in any way you find useful provided that you agree that Agilent Technologies has no warranty obligations or liability for any example programs The example programs are in Microsoft Visual BASIC 6 0 using the VISA COM IO library You must first load the VISA COM library to use these examples The VISA COM IO library is available with version M or later of the Agilent IO libraries for Windows Before using the example code in Visual BASIC you must reference two VISA COM objects In Visual BASIC go to Projects gt References and select Agilent VISA COM Resource Manager 1 0 filename AgtRM dll and VISA COM 1 0 Type Library filename VisaCom tlb To use this sample code in Visual Basic NET see the VISA COM documentation to reference VISA COM in a Visual BASIC project Copy the code provided in this chapter and call
66. IMM 85 SOUR VOLT MODE 85 SOUR VOLT PROT LEV 86 SOUR VOLT PROT STAT 86 SOUR VOLT RANG 86 SOUR VOLT TRIG 85 specifications characteristics 110 performance 108 Series N6700 User s Guide standard event status group 87 status byte 87 status commands 87 STAT OPER COND 89 STAT OPER ENAB 89 STAT OPER NTR 90 STAT OPER PTR 90 STAT OPER 89 STAT PRES 89 STAT QUES COND 90 STAT QUES ENAB 91 STAT QUES NTR 91 STAT QUES PTR 91 STAT QUES 90 step programming 42 storing states 47 subsystem commands 67 suffixes 65 support rails 16 synchronizing measurements 56 system commands 94 SYST CHAN MOD 94 SYST CHAN OPT 94 SYST CHAN SER 94 SYST COMM RLST 94 SYST ERR 95 SYST VERS 95 system protection connections 146 test extensions 49 54 56 transient recovery time 122 Series N6700 User s Guide Index transient trigger generate 45 trigger commands 97 TRIG 98 TRIG TRAN SOUR 98 TRIG ACO 97 TRIG ACQ SOUR 97 turn on delay 41 types of SCPI commands 60 U UNR 90 USB interface 37 V verification 118 equipment 118 voltage measurement range 46 76 output range 86 programming accuracy 120 readback accuracy 120 returning voltage data 56 setting 28 40 Warning 3 warranty 2 Web server 48 web URL s 4 wire sizes 19 WTG meas 89 WTG tran 89 171 ae According to ISO IEC Guide 22 and CEN CENELEC EN 45014 Responsible Party Alte
67. LT 1 4 MEAS CURR 1 4 Front Panel Select the Meter key Simultaneous Voltage and Current Measurements Series N6700 User s Guide Some models have simultaneous voltage and current measurement capability Refer to Chapter 1 Model Differences for model specific information In this case BOTH voltage and current are acquired on any measurement regardless of the parameter that is being measured To return both values of a simultaneous measurement SCPI Command First measure either the output voltage or current MEAS VOLT 1 4 Front Panel Not available Then Fetch the other parameter FETC CURR 1 4 45 System Related Operations Measurement Ranges Some models have two voltage and current measurement ranges Refer to Chapter 1 Model Differences for model specific information Selecting a lower measurement range provides greater measurement accuracy provided that the measurment does not exceed the range The commands that control the ranges are Front Panel SCPI Command Select Measure Range SENS CURR RANG 0 1 1 SENS VOLT RANG 5 1 Select the desired voltage or en current range and press Select When the range is set to MAX the maximum current that can be measured is the maximum rating of the unit Two examples of programming measurement ranges are 0 1 A range To select program values lt 0 1A 3A range To select program values gt 0 1A and lt 3A
68. Move the cursor to a menu item Turn the outputs on or off inactivity Press any key to Select the highlighted menu item Enter voltage or current restore the display a Ie aa onient mim Sp 000 a q o CV Set 20 000V 5 500A Hen Err mem O 5D Go E Enter i Z On Off switch and LED System keys Numeric entry keys LED indicates power is on Toggle between meter mode and the Enter values Green normal operation command menus Increment or decrement Amber display is screen Exit a menu and return to meter mode values saver mode Select an output channel to display The Rear Panel At a Glance 3 pin IEC 320 ac input connector USB mini B Chassis ground Power cord requires connector GPIB connector binding post ground conductor s S 4 pin output connector 4 pin digital control Activity indicators LAN connector Includes output and connector Top LED indicates 10 100 Base T sense terminals Connector function is activity Bottom LED user configurable indicates link integrity SHOCK HAZARD The power cord provides a chassis ground through a third conductor Be certain that your power outlet is of the three conductor type with the correct pin connected to earth ground 10 Series N6700 User s Guide
69. NDow TYPE lt chanlist gt This command sets the window function used in DC measurement calculations on models that have measurement controls Select from HANNing A signal conditioning window that reduces errors in DC measurement calculations in the presence of periodic signals such as AC line ripple The Hanning window multiplies each point in the sample by the function cosine RECTangular A window that returns measurement calculations with no signal conditioning Note that neither window function alters the instantaneous voltage or current data returned in the measurement array The RST value RECTangular 76 Series N6700 User s Guide Output Subsystem Output Subsystem The Output subsystem controls the output power on protection and relay functions OUTPut STATe ON OFF NORelay lt chanlist gt OUTPut STATe lt chanlist gt This command enables or disables the specified output channel s The enabled state is ON 1 the disabled state is OFF 0 The state of a disabled output is a condition of zero output voltage and a zero source current If output and sense relays are installed in the module they will open when the output is disabled and close when the output is enabled The query returns 0 if the output is off and 1 if the output is on The NORelay optional parameter lets you turn the output state on or off and leave the state of the relays unchanged When not specified the relays open a
70. NS server DNS server Automatically gets the address of the DNS server on your network if you have enabled DHCP in the IP menu Select this item if you are not using DHCP or need to connect to a specific DNS server Lets you manually enter the address of the DNS server Contact your network administrator for the server address to use e The instrument is shipped with a unique host name If you want to change the host name you should do so before you connect the instrument to the network Otherwise the original host name may be cached in the network for up to several hours To change the Host name select System Interface LAN Name The following parameters can be configured Host name Use Dynamic DNS naming service Use NetBIOS naming service Enter a Host name for your instrument in this field The Host name is the host portion of the domain name which is translated into an IP address Use the navigation keys to enter an alpha character Use the up down navigation or arrow keys to select a letter from the alphabetic choices as you scroll through the selections Use the number keys to enter a number Registers the Host name using the Dynamic DNS naming system Registers the Host name using the NetBIOS naming protocol f Some dynamic DNS servers require an instrument to register not only the Host name but also the domain name To set the Domain name select System Interface LAN Domain Domain name Enter a D
71. PI Command Completion SCPI Command Completion WAI OPC OPC SCPI commands sent to the power system 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 The following is a list of parallel commands You should use some form of command synchronization as discussed in this section before assuming that these commands have completed OUTPUT STATE INITIATE VOLT OUTPUT PROTECTION CLEAR CURR FUNC MODE The WAI OPC and OPC common commands provide different ways of indicating when all transmitted commands including any parallel ones have completed their operations Some practical considerations for using these commands are as follows This command prevents the power system from processing subsequent commands until all pending operations are completed For example the WAI command can be used to make a current measurement after an output on command has completed OUTPUT ON 1 WAI MEAS CURR 1 This command 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 This command sets the OPC status bit when all
72. Position 15 5 4 3 2 1 0 Bit Value 16 8 4 2 1 Bit Name WTG tran WTG meas OFF CC CV WTG tran The transient system is waiting for a trigger OFF The output is programmed off WTG meas The measurement system is waiting for CC The output is in constant current a trigger CV The output is in constant voltage STATus OPERtion CONDition lt chanlist gt This query returns the value of the Operation Condition register That is a read only register which holds the live unlatched operational status of the power system STATus OPERation ENABle lt value gt lt chanlist gt STATus OPERation ENABle lt chanlist gt This command and its query set and read the value of the Operational Enable register This register is a 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 Series N6700 User s Guide 89 Status Subsystem STATus OPERation NTRansition lt value gt STATus OPERation PTRansition lt value gt STATus OPERation NTRansition STATus OPERation PTRansition lt chanlist gt lt chanlist gt lt chanlist gt lt chanlist gt These commands set and read the value of the Operation NTR Negative Transition and PTR Positive Transition registers These registers serve as polarity
73. Queries whether the specified output channel is on or off Response is either 1 on or 0 off Sets the power on state of the output channels For on off 0 all outputs will be off state when the unit is turned on For on off 1 all outputs will be in the on state when the power system is turned on This command requires the output power on state to be set to RCLO Returns a 1 if any channels are set to turn on their output at power on Sets the reprogramming delay for the specified output channel This delay is used to mask the CV CC CP UNR and other status bits from the fault register and the OCP function for the specified delay period Queries the present reprogramming delay of the specified output channel Does nothing Always returns a 1 Does nothing Queries the present programming or hardware error An error code number is returned over the GPIB to identify the error Queries the fault register of the specified output channel A bit is set in the fault register when the corresponding bit in both the status and the mask registers The response is an integer 0 to 255 The fault register is cleared after being read Queries the model number of the power system Generates error 113 Unit must be calibrated using SCPI commands see Appendix B see Appendix B OUTP STAT OUTP STAT OUTP PON STAT RCLO OUTP PON STAT OUTP PROT DEL OUTP PROT DEL None None None SYST ERR STA
74. R 2 miO N IS 6 TWIST LEADS LOAD WITH LOCAL SENSING WITH REMOTE SENSING Setting the Outputs Program both outputs to the desired output voltage Then program the current limit point of each output The current limit point of the paralleled outputs will be the sum of both individual current limit points The output current of the parallel combination will be the algebraic sum of the individual current readbacks The operating mode of each paralleled output channel is determined by the channel s programmed settings operating point and load condition Because these conditions may change during parallel operation the status annunciators on the front panel will reflect these changes This is normal Momentary status changes are also normal Series N6700 User s Guide 23 Series Connections Effect on Specifications Current Voltage Load Transient Recovery Time Series Connections 24 Specifications for outputs operating in parallel can be obtained from the specifications for single outputs Most specifications are expressed as a constant or as a percentage or ppm plus a constant For parallel operation the percentage portion remains unchanged while constant portions or any constants are changed as indicated below For current readback accuracy and temperature coefficient of current readback use the minus current specifications All parallel speci
75. Select Enable to enable calibration Voltage Programming and Measurement Calibration Connect the DVM s voltage input to an output channel Select the full scale voltage programming and measurement range The following example selects the 50 volt full scale range of channel 1 The value entered must be the maximum voltage of the range Front Panel SCPI Command Select CAL VOLT 50 1 System Cal Sequences Vprog Then select the High range Select the first voltage calibration point Front Panel SCPI Command Select Next The information field CAL LEV P1 OPC should indicate Enter P1 data Measure the output voltage with the DVM and enter the data Front Panel SCPI Command Select the Measured Data field Enter CAL DATA lt data gt the data from the external DVM Press Select when done Select the second voltage calibration point Front Panel SCPI Command Select Next The information field CAL LEV P2 should indicate Enter P2 data OPC Series N6700 User s Guide Series N6700 User s Guide Calibration Step 6 Measure the output voltage with the DVM and enter the data Front Panel SCPI Command Select the Measured Data field Enter CAL DATA lt data gt the data from the external DVM Press Select when done Press Next to finish calibration Low Range Voltage Programming Calibration This only applies to Agilent Models N6761A and N6762A Step 7 Select the low voltage programming range This exam
76. T OPER STAT QUES ESE IDN see Appendix B Series N6700 User s Guide 163 Compatibility Commands Agilent 662xA Command Description Similar SCPI Command IHI lt ch gt Generates error 113 Unit must be calibrated using SCPI commands see Appendix B ILO lt ch gt Generates error 113 Unit must be calibrated using SCPI commands see Appendix B IOUT lt ch gt Queries the measured output current of the specified output channel The MEAS CURR response is a real number The front panel display can be used to monitor the measured output current and voltage of the selected output channel IRLO lt ch gt Generates error 113 None IRHI lt ch gt Generates error 113 None IRLN lt ch gt Generates error 113 None IRHN lt ch gt Generates error 113 None IRSET lt ch gt lt x gt IRSET lt ch gt ISET lt ch gt lt current gt ISET lt ch gt ISTEP lt ch gt lt x gt METER lt ch gt METER OCP lt ch gt lt on off gt OCP lt ch gt OCRST lt ch gt OUT lt ch gt lt on off gt OUT lt ch gt Sets the full scale current range programming for an output channel The power system will select the lowest operating range that will contain the value x If the present operating current is greater than the full scale range selected the present output current will be reduced to the full scale value of the new range selected If the current entered is larger tha
77. This command specifies how the list responds to triggers Applies only to models with list capability Causes the output to remain at the present step until a trigger advances it to the next step Triggers that arrive during the dwell time are ignored Causes the output to automatically advance to each step after the receipt of an initial starting trigger The steps are paced by the dwell list As each dwell time elapses the next step is immediately output The RST value AUTO SOURce LIST TERMinate LAST ON OFF lt chanlist gt SOURce LIST TERMinate LAST lt chanlist gt This command determines the output value when the list terminates Applies only to models with list capability The state is either ON 1 or OFF 0 When ON the output voltage or current remains at the value of the last list step The value of the last voltage or current list step becomes the IMMediate value when the list completes When OFF and also when the list is aborted the output returns to the settings it was at before the list started The RST value OFF SOURce LIST TOUTput BOSTep DATA ON OFF ON OFF lt chanlist gt SOURce LIST TOUTput BOSTep DATA lt chanlist gt This command specifies which list steps generate a trigger out signal at the beginning of the list step Applies only to models with list capability A comma delimited list of up to 512 steps may be programmed The state is either ON 1 or OFF 0
78. UNC VOLT SENS SWE POIN 1024 SENS SWE OFFS POIN 0 SENS SWE TINT 20 48E 6 SENS VOLT RANG MAX SENS WIND RECT Trigger Function INIT CONT TRAN OFF TRIG ACO SOUR BUS TRIG TRAN SOUR BUS Step Function SOUR STEP TOUT FALSE Voltage Function SOUR VOLT MIN SOUR VOLT MODE FIX SOUR VOLT PROT LEV MAX SOUR VOLT PROT STAT ON SOUR VOLT RANG MAX SOUR VOLT TRIG MIN The calibration state and all list settings are not saved by the SAV command Series N6700 User s Guide 71 Calibration Subsystem Calibration Subsystem The calibration subsystem lets you calibrate the power system Refer to Appendix B for details If calibration mode has not been enabled with CALibrate STATe the calibration commands will generate an error Use CALibrate SAVE to save any changes otherwise all changes will be lost when you exit calibration mode CALibrate CURRent LEVel lt value gt lt channel gt This command initiates calibration of the output current The value that you enter selects the range CALibrate CURRent MEASure lt value gt lt channel gt This command initiates calibration of the current measurement range The value that you enter selects the range CALibrate CURRent PEAK lt channel gt This command initiates calibration of the peak current limit CALibrate DATA lt value gt This command enters a calibration value that you obtain by reading an external meter You must first select a calibratio
79. Verification Loading Transient TOTEE TEE aa s s6seseeereteces Unloading Transient Constant Current Tests Test each output channel individually Refer to the appropriate test record form for the instrument settings of the model you are checking Series N6700 User s Guide Current Programming and Readback Accuracy Test category performance calibration This test verifies that the current programming and measurement functions are within specifications 1 Turn off the power system and connect the current shunt directly across the output terminals Connect the DVM directly across the current shunt as shown in Test Setup figure B Note that the electronic load is not used in this portion of the test Turn on the power system and program the instrument settings as described in the test record form under Current Programming amp Readback Min Current The CC annunciator should be on and the output voltage reading should be approximately zero Divide the voltage drop DVM reading across the current shunt by the shunt resistance to convert to amps and record this value out Also record the current reading on the front panel display The readings should be within the limits specified in the test record form for the appropriate model under Current Programming and Readback Min Current Program the instrument settings as described in the test record form under Current Programming amp Readback High
80. age key to enter a value Voltage Use the Voltage key to select the voltage entry field In the display below channel 1 s voltage setting is selected Enter the desired setting using the numeric keypad Then press Enter Chan 1 Qutput Voltage If you make a mistake either use the backspace key to delete the number press Back to back out of the menu or press Meter to return to meter mode 28 Series N6700 User s Guide Entering a Current Limit Setting Entering a Current Limit Setting Method 1 Use the Navigation and Arrow Keys Navigation Keys Use the left and right navigation keys to navigate to the setting that you wish O to change In the display below channel 1 s current setting is selected Enter a value using the numeric keypad Then press Enter E 0 0000V 0 0000A m e e ese ay Arrow Keys You can also use the arrow keys to adjust the value up or down When the ry output is on and the unit is operating in CC mode the output current changes immediately Otherwise the value will become effective when the output is turned on Method 2 Use the Current key to enter a value Current Use the Current key to select the current entry field In the display below channel 1 s voltage setting is selected Enter the desired setting using the numeric keypad Then press Enter Chan 1 OQutput Current If you make a mistake either use the backspace key to delet
81. al Operation According to EN 27779 Type Test Schalldruckpegel Lp lt 70 dB A Am Arbeitsplatz Normaler Betrieb Nach EN 27779 Typpriifung Output Terminal Isolation Maximum rating No output terminal may be more than 240 VDC from any other terminal or chassis ground AC Input Nominal Input Ratings Input Range Power Consumption 100 VAC 240 VAC 50 60Hz 86 VAC 264 VAC 1000 VA typical 1100 VA maximum with power factor correction Fuse Internal fuse not customer accessible Dimensions Height 44 45 mm 1 75 in Width 432 5 mm 17 03 in Depth 596 9 mm 23 5 in Weight With 4 installed modules Net 12 78 kg 28 Ibs Output Relays Option 761 Power Module Option Characteristics Output Lists Option 054 Digitized Measurements Option 054 Type Double pole double throw Location output amp sense terminals Maximum number of steps 512 Maximum measurement points 4096 Maximum dwell time in seconds 262 Maximum sample rate 50 kHz Maximum list repetitions 256 or infinite 114 Series N6700 User s Guide Auto Ranging Characteristic Voltage Autoranging 50 W Output 50 V 50 V 50 W curve 12V 8 5V Current Voltage Autoranging 100 W Output 100 W curve Current Voltage A 50 V 33 V
82. alibration constants in non volatile memory When exiting calibration mode the calibration constants in non volatile memory are restored If calibration mode is exited without first saving the new constants the previous constants are restored CALibrate STATe ON OFF lt password gt CALibrate STATe This command enables or disables calibration mode Calibration mode must be enabled for the power system to accept any calibration commands The first parameter specifies the On 1 or Off 0 state The second parameter is the password A numeric password is required if 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 returns only the state not the password The RST value Off When the calibration state is changed from enabled to disabled new calibration constants are lost unless they have already been stored with CALibrate SAVE CALibrate VOLTage CMRR lt channel gt This command initiates calibration of the voltage common mode rejection ratio CALibrate VOLTage LEVel lt value gt lt channel gt This command initiates calibration of the output voltage The value that you enter selects the range This is because the instrument selects the range with the best resolution for the value entered CALibrate VOLTage MEASure lt value gt lt channel gt This command i
83. ammed or queried from the power system is ASCII The data may be numerical or character string Numeric 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 Boolean Data They can be numeric 0 1 or named ON OFF String program data String parameters enclosed in single or double quotes Suffixes and Multipliers Class Suffix Unit Unit with Multiplier Current A ampere MA milliampere Amplitude V volt MV millivolt Time S second MS millisecond Common Multipliers 1E3 K kilo 1E 3 M milli 1E 6 U micro Response Data Types Symbol Response Formats 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 single or double quotes 65 SC
84. and press Select In Step mode the triggered value becomes the immediate value when the trigger is received In Fixed mode trigger signals are ignored the immediate values remain in effect when a trigger is received 42 Series N6700 User s Guide Synchronizing Output Steps Set the Voltage or Current Trigger Levels Next use the following commands to program an output trigger level The output will go to this level when the trigger is received If you have a model that has multiple ranges the selected triggered voltage and current settings must be within the same range that the output channel is presently operating in SCPI Command To set a voltage and current trigger level for output 1 use VOLT TRIG 15 1 CURR TRIG 1 1 Front Panel Select Transient Step Then select the Trig Voltage box Enter a value and press Select Select the Trig Current box to set current Enter a value and press Select Select the Transient Trigger Source An immediate trigger command from either the front panel or over the bus will generate an immediate trigger regardless of the trigger source Bus Pin lt number gt Transient lt channel gt Series N6700 User s Guide Unless you are using the front panel menu or a TRIG TRAN command to trigger the output select a trigger source from the following Selects GPIB device trigger TRG or lt GET gt Group Execute Trigger Selects a pin on the external port
85. ands Protection OVRST and OCRST will reset all latched protection functions not just over voltage or functions over current 162 Series N6700 User s Guide Compatibility Commands Compatibility Command Summary The following table documents the compatibility commands that the Agilent N6700 MPS supports All compatibility commands are accepted however some commands will generate an error Agilent 662xA Command Description Similar SCPI Command ASTS lt ch gt Queries the accumulated status ASTS of the specified output channel STAT OPER EVEN The response represents the sum of the binary weights of the ASTS oS EVEN register bits The ASTS register is automatically set to the present status i after being queried CLR Returns the entire power system all outputs to the power on state except RST CMODE lt on off gt CMODE DC lt ch gt lt on off gt DC lt ch gt DCPON lt on off gt DCPON DLY lt ch gt lt delay gt DLY lt ch gt DSP lt on off gt DSP DSP XXXXXXXXXXXX ERR FAULT lt ch gt ID IDATA lt ch gt lt llo gt lt Ihi gt the unit is not unaddressed and its store recall registers are not changed Generates error 113 The unit must be calibrated using SCPI commands Generates error 113 The unit must be calibrated using SCPI commands Turns the specified output channel on or off On off 0 turns the channel off on off 1 turns the channel on
86. ate To recall a state RCL lt n gt When shipped from the factory the power system is configured to automatically recall the reset RST settings at power on However you can configure the power system to use the settings stored in memory location 0 at power on Front Panel SCPI Command Select States PowerOn OUTP PON STAT RCLO Select Recall State 0 then press Select Front Panel Lockout You can disable the front panel keys to prevent unwanted control of the instrument from the front panel This can only be done through the following SCPI command Front Panel SCPI Command Not available SYST COMM RLST RWLock Front Panel Screen Saver Series N6700 User s Guide As shipped from the factory the power system has a front panel screen saver that is set to come on one hour after activity on the front panel or interface has ceased The screen saver function significantly increases the life of the LCD display by turning it off during periods of inactivity When the screen saver is active the front panel display turns off and the LED next to the Line switch changes from green to amber To restore the front panel display simply press one of the front panel keys The first action of the key turns the display on Subsequently the key will revert to its normal function If the Wake on I O menu function is selected the display will be restored on any time an I O command is sent to the instrument Additionally any int
87. ation Similarly rated outputs can be operated directly in parallel or can be connected for straight series operation Auto series and auto parallel operation is not available 112 Series N6700 User s Guide Supplemental Characteristics Agilent N6700A MPS Mainframe N6700A Command Processing Time From receipt of command to start of the output change lt 1ms Protection Response Characteristics INH input Fault on coupled outputs 5 us from receipt of inhibit to start of shutdown lt 10 us from receipt of fault to start of shutdown Digital Control Characteristics Maximum voltage ratings Pins 1 and 2 as FLT output Pins 1 2 3 as digital trigger outputs pin 4 common Pins 1 2 3 as digital trigger inputs and pin 3 as INH input pin 4 common 16 5 VDC 5 VDC between pins pin 4 is internally connected to chassis ground Maximum low level output voltage 0 5 V 4 mA Maximum low level sink current 4 mA Typical high level leakage current 0 14 mA 16 5 VDC Maximum low level output voltage 0 5 V 4 mA 1 V 50 mA 1 75 V 100 mA Maximum low level sink current 100 mA Typical high level leakage current 0 12 mA 16 5 VDC Maximum low level input voltage 0 8 V Minimum high level input voltage 2 V Typical low level current 2 mA 0 V internal 2 2k pull up Typical high level leakage current 0 12 mA 16 5 VDC Interface Capabilities GPIB USB 2 0 10 100 LAN
88. connector as the trigger source You can specify pins 1 2 or 3 The selected pin must be configured as a Trigger Input in order to be used as a trigger source see Appendix C Selects the output channel s transient system as the trigger source lt channel gt specifies the channel When you select a channel you must also set up that channel s transient system to generate a trigger out signal Refer to Generating a Transient Trigger Signal Use the following commands to select a trigger source Front Panel To select Bus triggers select Transient TrigSource Then select Bus To select Digital pin triggers select Transient TrigSource Then select one of the digital port pins To select Transient output triggers select Transient TrigSource Then select one of the output channels SCPI Command To select Bus triggers for output 1 TRIG SOUR BUS 1 To select Digital pin triggers TRIG SOUR PIN lt n gt 1 where n is the pin number To select Transient output triggers TRIG SOUR TRAN lt n gt 1 where n is the output channel that will generate the trigger signal 43 Synchronizing Output Steps Initiate the Transient Trigger System Next you must initiate or enable the transient trigger system When the power system is turned on the trigger system is in the idle state In this state the trigger system is disabled ignoring all triggers Initiating the trigger system moves it from the idle state t
89. d the rms limits in the test record form for the appropriate model under CV Ripple and Noise rms Transient Recovery Time Test category 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 1 Turn off the power system and connect the output as in Test Setup figure A with the oscilloscope across the sense terminals Turn on the power system and program the program the instrument settings as described in the test record form under Transient Response Set the electronic load to operate in constant current mode Program its load current to the lower currrent value indicated in in the test record form under Transient Response Set the electronic load s transient generator frequency to 100 Hz and its duty cycle to 50 Program the load s transient current level to the higher currrent value indicated in in the test record form under Transient Response and turn the transient generator on Adjust the oscilloscope for a waveform similar to that shown in the following figure The output voltage should return to within the specified voltage at the specified time following the 50 load change 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 form under Transient Response Series N6700 User s Guide
90. de which you can download from the Agilent web site at http www agilent com find connectivity Series N6700 User s Guide Before installing the instrument check the list under Items Supplied and verify that you have received these items with your instrument If anything is missing please contact your nearest Agilent Sales and Support Office 13 General Information General Information Models Agilent Model Description N6700A MPS Mainframe without DC Power Modules N6721A N6729A Pre configured models for compatibility Refer to Appendix E N6731A 50 W 5 V DC Power Module N6732A N6742A 50 W 80 W 8V DC Power Module N6733A N6743A 50 W 100 W 20 V DC Power Module N6734A N6744A 52 5 W 105 W 35 V DC Power Module N6735A N6745A 40 W 80 W 50 V DC Power Module N6751A N6752A 50 W 100 W High Performance Auto ranging DC Power Module N6761A N6762A 50 W 100 W Precision DC Power Module Items Supplied Item Description Agilent Part Number Power Cord A power cord appropriate for your location Call Agilent Sales amp Support Office Output Connector A 4 pin connector for connecting power and remote sense leads 1253 5826 Digital Connector A 4 pin connector for connecting signal lines to the digital port 1253 5830 Sense Jumpers 2 jumpers per module to connect the sense to the output terminals 8120 8821 Filler Module Only provided if there are less than four modules installed 5002 2813 User s Guide Co
91. dels see Chapter 1 Model Differences The RST value FIXed Series N6700 User s Guide 85 Source Subsystem SOURce VOLTage PROTection LEVel lt value gt MIN MAX lt chanlist gt SOURce VOLTage PROTection LEVel lt chanlist gt This command sets the overvoltage protection OVP level of the output channel The values are programmed in volts If the output voltage exceeds the OVP level the output is disabled and the Questionable Condition status register OV bit is set An overvoltage condition can be cleared with the Output Protection Clear command after the condition that caused the OVP trip is removed The OVP function can be disabled using VOLTage PROTection STATe The RST value MAX SOURce VOLTage PROTection STATe ON OFF lt chanlist gt SOURce VOLTage PROTection STATe lt chanlist gt This command enables or disables the overvoltage protection OVP function The enabled state is ON 1 the disabled state is OFF 0 When the overvoltage protection circuit trips the output of the channel shuts down If output disconnect relays are installed they will open The RST value ON SOURce VOLTage RANGe lt value gt MIN MAX lt chanlist gt SOURce VOLTage RANGe lt chanlist gt This command only applies to models that have programmable ranges Refer to Appendix A for the available ranges for each model This command sets the output voltage range Units are in volts
92. dels N6761A and N6762A Step 7 Connect a precision shunt resistor to an output channel Connect the DVM to measure the voltage across the shunt The shunt resistor should be able to measure at least 120 of the rated output current of this current range Step 8 Select the low current programming range The following example selects the 0 1 amp low current programming range of channel 1 The value to program a range must be the maximum current of the range Front Panel SCPI Command Select CAL CURR 0 1 1 System Cal Sequences Iprog Then select the Low range Step 9 Select the first current calibration point Front Panel SCPI Command Select Next The information field CAL LEV P1 should indicate Enter P1 data OPC Step 10 Calculate the shunt current I V R and enter the data Front Panel SCPI Command Select the Measured Data field Enter CAL DATA lt data gt the data from the external DVM Press Select when done Step 11 Select the second current calibration point Front Panel SCPI Command Select Next The information field CAL LEV P2 should indicate Enter P2 data OPC Step 12 Calculate the shunt current V R and enter the data Front Panel SCPI Command Select the Measured Data field Enter CAL DATA lt data gt the data from the external DVM Press Select when done Press Next to finish calibration Series N6700 User s Guide Calibration Low Range Current Measurement Calibrat
93. dix A Minimum clearances for bench operation are 2 inches 51 mm along the sides and back Channel Number Cleaning The channel number of a specific module is determined by the location of that module in the mainframe When viewed from the rear the module next to the GPIB connector is always output channel one Numbering continues sequentially to the left from one to four If there are less than four modules channel numbering corresponds to the number of installed modules Unused channel slots contain filler modules to ensure proper cooling SHOCK HAZARD To prevent electric shock unplug the unit before cleaning Connecting the Line Cord Use a dry cloth or one slightly dampened with water to clean the external case parts Do not attempt to clean internally FIRE HAZARD Use only the power cord that was supplied with your instrument Using other types of power cords may cause overheating of the power cord resulting in fire SHOCK HAZARD The power cord provides a chassis ground through a third conductor Be certain that your power outlet is of the three conductor type with the correct pin connected to earth ground 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 Refer to Appendix D for more information The AC input on the back of your unit is a universal AC input It accepts nominal line
94. dules which is comparable to linear supplies Refer to Appendix A for details Auto ranging produces the maximum rated power over a wide and continuous range of voltage and current settings for auto ranging and precision power modules Refer to Appendix A for details A turn on turn off delay capability for each output allows output on off sequencing Series N6700 User s Guide Feature The Agilent N6700 Modular Power System At a Glance Remote voltage Two remote sensing terminals are provided for each output When shipped from the sensing factory the remote sense terminals are strapped for local sensing Refer to Chapter 2 for details Voltage All output modules can measure their own output voltage and current and current measurements Voltage current Each output has over voltage over current and over temperature protection Over and temperature voltage and over current protection are programmable When activated the protection protection circuits cause the voltage to go to zero the output to be disabled and the protection status to be reported System Features SCPI language The instrument is compatible with the Standard Commands for Programmable Instruments SCPI Choice of three GPIB IEEE 488 LAN and USB mini B remote programming interfaces are interfaces built in Front panel 1 0 Menus let you set up GPIB and LAN parameters from the front panel Refer to setup Chapter 3 for details Built in Web A bui
95. e the number press Back to back out of the menu or press Meter to return to meter mode Enabling the Output Use the On Off key to enable the output On Off If a load is connected to the output the front panel display will indicate that it is drawing current Otherwise the current reading will be zero The status indicator next to the channel number indicates the output s status In this case the output channel is in constant voltage mode 12 5230V 0 1789A For a complete description of the status indicators refer to Chapter 6 under STATus OPERation EVENt and STATus QUEStionable EVENt Series N6700 User s Guide 29 Using the Front Panel Menu Using the Front Panel Menu The front panel command menu lets you access most of the power system s functions The actual function controls are located at the lowest menu level Press the Menu key to access the command menu Press the navigation keys to move across the menu commands Press the center Sel key to select a command and move down to the next level in the menu Press the Help key at the lowest menu level to display help information about the function controls The following example shows you how to navigate the front panel command menu to program the over voltage protection function Set the Over Voltage Protection Menu 30 When over voltage protection is enabled the power system will turn off its output if the out
96. ect the first voltage calibration point Front Panel SCPI Command Select Next The information field CAL LEV P1 should indicate Enter P1 data OPC Step 14 Measure the output voltage with the DVM and enter the data Front Panel SCPI Command Select the Measured Data field Enter CAL DATA lt data gt the data from the external DVM Press Select when done Step 15 Select the second voltage calibration point Front Panel SCPI Command Select Next The information field CAL LEV P2 should indicate Enter P2 data OPC Step 16 Measure the output voltage with the DVM and enter the data Front Panel SCPI Command Select the Measured Data field Enter CAL DATA lt data gt the data from the external DVM Press Select when done Press Next to finish calibration Voltage Common Mode Rejection Ratio Calibration This only applies to Agilent Models N6751A N6752A N6761A and N6762A Step 17 For this step only connect the sense terminal to the output and to the sense terminal Do not connect the output terminal Connect the 25 ohm load resistor across the and output terminals see the equipment list This procedure is automatic and takes a few seconds Series N6700 User s Guide Series N6700 User s Guide Calibration Front Panel SCPI Command Select CAL VOLT CMRR 1 System Cal Sequences CMRR OPC Then select Next Current Programming and Measurement Calibration Step 1 Connect a precision
97. ected output channel is disabled when a protection fault is triggered The RST value OFF OUTPut PROTection DELay lt delay gt MIN MAX lt chanlist gt OUTPut PROTection DELay lt chanlist gt This command sets the over current protection programming delay This prevents momentary changes in status that can occur during reprogramming from triggering the over current protection function Programmed values can range from 0 to 255 milliseconds The RST value 20 ms OUTPut RELay STATe ON OFF lt chanlist gt OUTPut RELay STATe lt chanlist gt Series N6700 User s Guide This command allows the relay state to be programmed independently of the output state When the relay state is On 1 the relays contacts close When the relay state is Off 0 the relay contacts open Do not use the relays as the means of connecting disconnecting the output while it is active Use this command if you want to turn the output off while having the relays remain closed or turn the output on while having the relays remain open In most applications the output relays should be controlled in coordination with the output state This functionality is provided by OUTPut STATe The RST value OFF 79 Source Subsystem Source Subsystem The Source subsystem programs the current digital list step and voltage functions The SOURce CURRent RANge SOURce VOLTage RANge and SOURce LIST commands do not apply to al
98. ed The Inhibit input is ignored OUTPut PON STATe RST RCLO OUTPut PON STATe 78 This command determines if the power on state is set to the RST RST state or the instrument state stored in memory location 0 RCLO The parameter is saved in non volatile memory Instrument states can be stored using the SAV command Refer to RST and RCL under System Commands for more information Series N6700 User s Guide Output Subsystem OUTPut PROTection CLEar lt chanlist gt This command clears the latched protection status that disables the output when an over voltage over temperature over current power fail or Inhibit status condition is detected All conditions that generate the fault must be removed before the latched status can be cleared The output is restored to the state it was in before the fault condition occurred If a protection shutdown occurs during an output list the list continues running even though the output is disabled When the protection status is cleared and the output becomes enabled again the output will be set to the values of the step that the list is presently at OUTPut PROTection COUPle ON OFF OUTPut PROTection COUP1le This command enables disables output coupling for protection faults When enabled ALL output channels are disabled when a protection fault occurs on any output channel The enabled state is On 1 the disabled state is Off 0 When disabled only the aff
99. ed to function either as trigger inputs or trigger outputs All three pins are referenced to the Signal Common pin To input an external trigger signal you can either apply a negative or a positive going pulse to the designated trigger input pin The trigger latency is 5 microseconds The minimum pulse width is 1 microsecond The pin s polarity setting determines which edge generates a trigger in event When configured as a trigger output the designated trigger pin will generate a 2 microsecond wide trigger pulse in response to a trigger event Depending on the polarity setting it can be either positive going or negative going when referenced to common The Fault Output function enables a fault condition on any channel to generate a fault signal on the Digital Control port The following conditions will generate a fault event over voltage over current over temperature inhibit signal and power fail ow AC line When this function is selected both pins 1 and 2 are dedicated to this function Pin 1 is the Fault output pin 2 is common for pin 1 This arrangement provides an optically isolated output Pin 2 s selected function is ignored Note that the Fault output signal remains latched until the fault condition is cleared You must also clear the protection circuit The Inhibit Input function lets an external input signal control the output state of all of the output channels in the mainframe The signal latency is 5 microseconds
100. erface activity also resets the timer on the screen saver As shipped the Wake on I O menu function is active 47 System Related Operations Front Panel SCPI Command Select Not Available System Preferences Display Enable or disable the screen saver by checking the Screen Saver checkbox Then Press Select Enter a value in minutes in the Saver Delay field to specify the time when the screen saver will activate Check Wake on 1 0 to activate the display with 1 0 bus activity Front Panel Contrast You can set the contrast of the front panel display to compensate for ambient lighting conditions The contrast can be set from 0 to 100 in increments of 1 As shipped the contrast is set to 50 Front Panel SCPI Command Select Not available System Preferences Display Enter a contrast value in the Contrast box Then Press Select Built In Web Server The power system contains a built in Web server that lets you control the instrument directly from an internet browser on your computer This feature requires Internet Explorer 5 or Netscape 6 2 Your PC must also have the ability to communicate over a LAN 48 The Web Server function is enabled when shipped Provided that you have correctly configured the instrument s LAN settings as discussed in chapter 2 simply type the instrument s Host name or IP address into your browser to launch the application Front Panel SCPI Command Select Not A
101. es The hardware and or software described in this document are furnished under a license and may be used or copied only in accordance with the terms of such license U S Government Restricted Rights Software and technical data rights granted to the federal government include only those rights customarily provided to end user customers Agilent provides this customary commercial license in Software and technical data pursuant to FAR 12 211 Technical Data and 12 212 Computer Software and for the Department of Defense DFARS 252 227 7015 Technical Data Commercial Items and DFARS 227 7202 3 Rights in Commercial Computer Software or Computer Software Documentation Series N6700 User s Guide Safety Notices 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 or instructions 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 Do not use this product in any manner not specified by the manufacturer The protective features of this product may be impaired if it is used in a manner not specified in the operation instructions Before Applying Power Verify that all safety precautions are taken Make all connections to the un
102. es per measurement Press NPLC 100 ENTER Turn on the power system and program the instrument settings as described in the test record form under CC Load Effect Set the electronic load for CV mode and program it to the output channel s voltage as described in the test record form under CC Load Effect The CC annunciator on the front panel must be on If it isn t adjust the load so that the output voltage drops slightly Divide the voltage drop DVM reading across the current monitoring resistor by its resistance to convert to amps and record this value lout Short the electronic load Divide the voltage drop DVM reading across the current monitoring resistor by its resistance to convert to amps and record this value lout The difference in the current readings in steps 4 and 5 is the load effect which should not exceed the value listed in the test record form for the appropriate model under CC Load Effect CC Source Effect Test category performance This test measures the change in output current that results from a change in AC line voltage from the minimum to maximum value within the line voltage specifications 1 Turn off the power system and connect the ac power line through a variable voltage transformer or AC source Connect the current shunt DVM and electronic load as shown in Test Setup figure B Connect the DVM directly across the current shunt Set the variable voltage transformer or
103. esistor 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 Test Set up The following figure illustrates the test set ups used for the verification procedures DC voltmeter scope or rms voltmeter DC voltmeter scope or rms voltmeter Electronic load or resistor Series N6700 User s Guide Electronic load or resistor Load Resistor Differential T amplifier output BNC gt 50 ohm termination input Scope or rms voltmeter 119 Verification 120 Constant Voltage Tests Test each output channel individually Refer to the appropriate test record form for the instrument settings of the model you are checking Voltage Programming and Readback Accuracy Test category performance calibration This test verifies that the voltage programming and measurement functions are within specifications 1 Turn off the power system and connect a DVM directly across the sense terminals as shown in Test Setup figure A Do not connect a load Turn on the power system and program the instrument settings as described in the test record form under
104. ess Select TRIG SOUR BUS 1 Step 9 Initiate the output trigger system To enable the trigger system for one transient event or trigger use Front Panel SCPI Command Select the Transient Control To program output 1 use Select Initiate and Press Select INIT TRAN 1 Step 10 Trigger the output pulse or pulse train Front Panel SCPI Command Select Transient Control TRG Select Trigger and Press Select Series N6700 User s Guide 51 Programming High Speed Test Extensions 52 Program an Arbitrary List The following procedure shows how to generate the list of voltage changes as illustrated in the following figure Trigger 0 1 2 3 4 5 List Count 1 lt List Count 2 Step 1 Set the function voltage or current for which you want to generate a list to List mode This example programs a voltage list Front Panel SCPI Command Select Transient Mode Volt To program output 1 use Scroll to List and press Select VOLT MODE LIST 1 Step 2 Program the list of values for the List function The order in which the values are entered determines the order in which the values will be output To generate the voltage list shown in the figure a list may include the following values 9 0 6 0 3 O Front Panel SCPI Command Select Transient List Config To program output 1 use Select the List Step number and LIST VOLT 9 0 6 0 3
105. ess the front panel menu To view the present LAN settings of the instrument use the front panel navigation keys to select System Interface LAN Status These settings may be different from the requested settings depending on your network configuration c To change the IP address of the instrument use the front panel navigation keys to select System Interface LAN IP The following parameters can be configured Enable DHCP Automatically assigns an IP address to the instrument provided it is connected to a network that supports DHCP Enable AutolP Automatically assigns an IP address to the instrument if it is on a network that does not have a DHCP server IP Address If enable DHCP and Enable AutolP are turned off you must manually enter your IP address in this field Contact your network administrator for the IP address to use Subnet Mask Lets you manually enter the subnet mask Ask your network administrator if a subnet mask is needed and for the correct mask Default Lets you manually enter the default gateway The Gateway gateway is a device that connects two networks Ask your network administrator if a gateway is in use and for the correct address d To configure the DNS setup of the instrument select the following menu commands System Interface LAN DNS The following parameters can be configured Series N6700 User s Guide 35 Configuring the Interface Obtain DNS server from DHCP Use the following D
106. etermined either by design or type testing All supplemental characteristics are typical unless otherwise noted 107 Performance Specifications Performance Specifications Agilent Models N6751A N6752A and N6761A N6762A N6751A N6752A N6761A N6762A DC Output Ratings Voltage 50V 50 V Current 5A 10A 15A 3A Power 50W 100W 50 W 100 W Output Ripple and Noise PARD from 20 Hz 20 MHz CV peak to peak NOTE 1 6 mV 6 mV CV rms 1 mV 1 mV Load Effect Regulation 07 2 Voltage 2 mV 0 5 mV Current 2mA 30 pA Source Effect Regulation Voltage 1 mV 0 5 mV Current 1mA 30 uA Programming Accuracy NOTE 3 at 23 C 5 C after a 30 minute warm up Voltage high range 0 06 19 mV 0 016 6 mV Voltage low range lt 5 5 V N A 0 016 1 5 mV Current high range 0 1 20 mA 0 04 200 uA Current low range lt 100 mA N A 0 04 15 uA Measurement Accuracy at 23 C 5 C Voltage high range 0 05 20 mV 0 016 6 mV Voltage low range lt 5 5 V N A 0 016 1 5 mV Current high range 0 1 4mA 0 03 200 uA Current low range lt 100 mA N A 0 03 15 uA Load Transient Recovery Time time to recover to within the settling band following a load change from 60 to 100 and from 100 to 60 of full load for models N6751A amp N6761A from 50 to 100 and from 100 to 50 of full load for models N6752A amp N6762A Voltage settling band 75 mV 75 mV Time lt 100 ps lt 150 us l For typical val
107. etting of the selected channel Number Keys s 9 t The number keys let you enter digits from 0 to 9 and a decimal point The minus sign is selected by the key The exponent must be added to the right of the E symbol 3 E The backspace key deletes digits as it backspaces over them 7 J 8 4 5 6 1 2 0 t arrow keys increment or decrement the value in certain fields They are also used to select letters in alphabetic entry fields 4 Enter The Enter key enters a value If you exit a field without pressing the Enter key the value is ignored Series N6700 User s Guide 11 2 Installation General Information 14 Inspecting the Unit 15 Installing the Unit 15 Connecting the Line Cord 17 Connecting the Outputs 18 Remote Sense Connections 22 Parallel Connections 23 Series Connections 24 This chapter describes how to install your power system It discusses installation rack mounting and line cord connections This chapter discusses how to connect your load to the output terminals It discusses what you need to know about wire sizes and how to compensate for voltage drops in the load leads It also discusses various loads configurations and how to connect the output terminals in series and parallel Detailed information on configuring the remote interfaces is included in the Agilent Technologies USB LAN GPIB Interfaces Connectivity Gui
108. external trigger Then use FETCh commands to return voltage or current information from the acquired data Briefly to make a triggered measurement 1 Select the measurement function to trigger 2 Select the trigger source 3 Initiate the trigger system and generate a trigger 4 Fetch the triggered measurements Select the Measurement Function to Trigger Some models have two measurement converters which allows simultaneous voltage and current measurements refer to Chapter 1 Model Differences If a model has only one converter and a triggered measurement is initiated the parameter that it measures either voltage or current must be specified Series N6700 User s Guide Programming High Speed Test Extensions To trigger measurements on output modules that do not have simultaneous voltage and current measurement capability select the measurement function as follows Front Panel SCPI Command Not Available To select the measurement function SENS FUNC VOLT 1 4 SENS FUNC CURR 1 4 If a model has simultaneous voltage and current measurements capability then BOTH voltage and current are acquired on any triggered measurement regardless of the setting of the SENSe FUNCtion command Select the Measurement Trigger Source An immediate trigger command over the bus will generate an immediate trigger regardless of the trigger source Unless you are using a TRIG ACQ command to trigger the measure
109. fications referring to current are twice the single output specification except for programming resolution which is the same for both single output and parallel output operation All parallel specifications referring to voltage are the same as for a single output except for CV load effect CV load cross regulation CV source effect and CV short term drift These are all twice the voltage programming accuracy including the percentage portion at all operating points Load transient specifications are typically twice the single output SHOCK HAZARD Floating voltages must not exceed 240 VDC No output terminal may be more than 240 VDC from chassis ground CAUTION Connect in series only outputs that have equivalent current ratings Each output has reverse voltage protection diodes across its output terminals The current conducted by this diode is not internally limited by the output Never connect an output in such a way that the diodes will conduct current in excess of the rated current of the output since damage could result Connecting outputs in series provides a greater voltage capability than can be obtained from a single output Because the current is the same through each element in a series circuit only connect outputs in series that have equivalent current ratings The following figure shows an example of how to connect two outputs in series to a single load with local sensing Connecting the S terminal of output 2 to t
110. filters between the Operation Condition 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 set to 0 then no transition of that bit at the Operation Condition register can set the corresponding bit in the Operation Event register STATus QUEStionable EVENt lt chanlist gt This query returns the value of the Questionable Event register The Event register is a read only register which stores latches all events that are passed by the Questionable NTR and or PTR filter Reading the Questionable Event register clears it The bit configuration of the Questionable status registers is as follows 8 6 5 4 3 2 1 0 Bit Position 15 12 11 10 9 Bit Value 2048 1024 512 Bit Name PROT UNR INH 32 16 8 4 2 1 cP OT CP PF oc OV PROT The output has been disabled because it is co
111. front panel will be on To clear the protection function and restore normal operation first remove that condition that caused the protection fault Then clear the protection function as follows Front Panel SCPI Command Select Protect Clear To clear a protection fault on output1 Select the Clear button OUTP PROT CLE 1 Synchronizing Output Steps The transient system lets you step the output voltage and current up or down in response to triggered events To generate a triggered output step you must 1 Enable the output to respond to trigger commands 2 Set the voltage or current trigger levels 3 Select the transient trigger source 4 Initiate the trigger system and provide a trigger signal Enable the Output to Respond to Trigger Commands First you must enable the output to respond to trigger commands Unless an output is enabled to respond to triggers nothing will happen even if you have programmed a trigger level and generated a trigger for the output Use the following commands to enable an output to respond to triggers Front Panel SCPI Command To enable voltage Step triggering To enable the voltage function on select Transient Mode Voltage output 1 to respond to triggers use Select Step and press Select VOLT MODE STEP 1 To enable the current function on output 1 to respond to triggers use CURR MODE STEP 1 To enable current Step triggering select Transient Mode Current Select Step
112. ger source bus tran 1 4 pin 1 3 Control Initiate Trigger or Abort output triggers Protect OVP Configures over voltage protections function ocPp Configures over current protections function Inhibit Configures the external inhibit signal Coupling Disables ALL output channels when a protection fault occurs Clear Clears output protection State Reset Resets the instrument to its reset RST state Save Recall Saves or recalls an instrument state PowerOn Selects the power on state System Interface LAN Status Displays interface status information IP Enables disables DHCP and Auto IP Also sets the IP Address Subnet Mask and Default Gateway DNS Configures the DNS server Name Configures the Dynamic DNS and NetBIOS naming service Domain Configures the Domain Name TCP Configures the TCP keepalive function Enable Enables disables the LAN interface and the built in Web server USB Status Displays status speed packets received and packets sent Identification USB connect string the instrument s unique USB identifier Enable Enables disables the USB interface GPIB Selects the GPIB address Reset Resets the interface settings to the factory shipped state 32 Series N6700 User s Guide Menu Command Using the Front Panel Menu Control Description System DigPort Pin 1 Function Specifies the pin function DiglO Trigin TrigOut DigIn or FaultOut Polarity Specifies the pin p
113. h settings Use a small screwdriver to move the switches Refer to Appendix B for settings information Do not use a pencil to move the switches Any graphite dust that gets on the switches will conduct electricity Step 4 SESSE SssSs Sss9g SSS m lt EL Ga lt et CH oo SL Cm T5 gt C E SE Series N6700 User s Guide Replace the GPIB carrier and the blower covers when finished Be careful not to bend the RFI clips on the edge of the blower cover when sliding it under the lip of the the output modules 155 Error Messages Error Messages 156 Displaying the SCPI error queue Error List Error 100 101 102 103 104 105 106 107 108 109 110 111 112 113 Front Panel SCPI Command Press the Error key SYST ERR If errors appear use the navigation keys to scroll though the list The entire error queue is read then emptied The following table documents the various error messages that the power system supports Device dependent Errors these errors set Standard Event Status register bit 3 No error This is the response to the ERR query when there are no errors Too many channels You have specified more channels than are installed in the mainframe Calibration state is off Calibration is not enabled The instrument will not
114. h the values are entered determines the sequence when the list executes The RST value 1 step with a value of MIN SOURce LIST CURRent POINts lt chanlist gt This query returns the number of points steps programmed in the current list Applies only to models with list capability SOURce LIST DWEL1 lt time gt lt time gt lt chanlist gt SOURce LIST DWEL1 lt chanlist gt This command specifies the dwell time for each list step Applies only to models with list capability A comma delimited list of up to 512 steps may be programmed Dwell time is the time that the output will remain at a specific step Dwell times can be programmed from 0 to 262 143 seconds with the following resolution Range in seconds Resolution 0 to 0 262143 1 microsecond 0 to 2 62143 10 microseconds 0 to 26 2143 100 microseconds 0 to 262 143 1 millisecond At the end of the dwell time the output state of the unit depends upon the LIST STEP program settings See LIST STEP The order in which the values are entered determines the sequence when the list executes The RST value 1 step with a value of 0 001 Series N6700 User s Guide 83 Source Subsystem SOURce LIST DWEL1 POINts lt chanlist gt This query returns the number of points steps in the dwell list Applies only to models with list capability SOURce LIST STEP ONCE AUTO lt chanlist gt SOURce LIST STEP lt chanlist gt ONCE AUTO
115. hanlist gt 80 This command enables or disables the over current protection OCP function The enabled state is On 1 the disabled state is Off 0 If the over current protection function is enabled and the output goes into constant current operation the output is disabled and the Questionable Condition status register OCP bit is set The current limit setting determines when the output channel goes into constant current operation An over current condition can be cleared with OUTPut PROTection CLEar after the cause of the condition is removed The RST value OFF Series N6700 User s Guide Source Subsystem SOURce CURRent RANGe lt value gt MIN MAX lt chanlist gt SOURce CURRent RANGe lt chanlist gt This command only applies to models that have programmable ranges Refer to Appendix A for the available ranges for each model This command sets the output current range Units are in amperes The instrument selects the range with the best resolution for the value entered When queried the returned value is the maximum DC current that can be output on the range that is presently set This command is coupled with the SOURce CURRent command This means that if a range command is sent that places an output on a range with a lower maximum current than the present current level an error is generated This also occurs if a current level is programmed with a value too large for the present range These types
116. he S terminal of output 1 and removing the sense jumper between S and V on output 2 compensates for the IR drop in the load lead from output 2 to output 1 If it is necessary to remote voltage sense at the load connect the sense leads of output 1 and output 2 as shown in the figure The sense lead of output 2 must remain connected to the sense terminal of output 1 The outputs may be set as previously described Series N6700 User s Guide OUTPUT 2 Series Connections OUTPUT 1 OUTPUT 2 OUTPUT 1 TWIST LEADS WITH LOCAL SENSING SENSE JUMPER INSTALLED SENSE JUMPERS INSTALLED TWIST LEADS co LOAD WITH REMOTE SENSING Setting the Outputs First program the current limit of each output to the total desired current limit point Then program the voltage of each output so that the sum of both voltages equals the total desired operating voltage The simplest way to accomplish this is to program each output to one half of the total desired operating voltage The operating mode of each output channel is determined by the channel s programmed settings operating point and load condition Because these conditions may change during parallel operation the status annunciators on the front panel will reflect these changes This is normal Momentary status changes are also normal Specifications for Series Operation Voltage Current Load T
117. iated Setting cannot be changed while the instrument is waiting for or executing a trigger sequence Cannot initiate voltage and current in fixed mode Cannot initiate the transient generator because either the voltage or the current function is set to Fixed mode 100 101 102 103 104 105 Command Errors these errors set Standard Event Status register bit 5 Command error Generic syntax error Invalid character An invalid character was found in the command string Syntax error Invalid syntax was found in the command string Check for blank spaces Invalid separator An invalid separator was found in the command string Check for proper use of Data type error A different data type than the one allowed was found in the command string GET not allowed A group execute trigger is not allowed in a command string Series N6700 User s Guide 157 Error Messages 158 108 109 110 111 112 113 114 120 121 123 124 128 130 131 134 138 140 141 144 148 150 151 158 Command Errors continued Parameter not allowed More parameters were received than were expected Missing parameter Fewer parameters were received than were expected Command header error An error was detected in the header Header separator error A character that was not a valid header separat
118. ications published in Appendix A limits These tests verify that the power system is operating normally and meets the These tests verify that the power system is operating within its calibration If the power system fails any of the tests or if abnormal test results are obtained try calibrating the unit If calibration is unsuccesful return the unit to an Agilent Technologies repair facility see Appendix D Equipment Required Type Digital Voltmeter Current Monitor Load Resistors Electronic Load GPIB Controller Oscilloscope RMS Voltmeter Differential Amplifier Terminations Variable voltage Transformer or AC source 118 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 may be found at the back of this section Specifications Resolution 10 nV 1V Readout 8 1 2 digits Accuracy 20 ppm 15 A 0 1 ohm 0 04 TC 5ppm C 50 Q 250 W 1 TC lt 100 ppm C CV noise 25 Q 250 W 1 TC lt 100 ppm C CV noise amp calibration 4 Q 250 W 1 TC lt 100 ppm C calibration 20 V 5 A minimum with transient capability and a slew rate of 833 kA s or better Full GPIB capabilities only required if you are calibrating the unit over the GPIB Sensitivity 1 mV Bandwidth Limit 20 MHz Probe 1 1 with RF tip True RMS Bandwidth 20 MHz Sensitivity 100 uV Bandwidth 20 MHz 1
119. ied by a new printing date 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 Institute of Standards and Technology to the extent allowed by the Institute 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 that prove to be defective Agilent Technologies does not warrant that the operation for the software firmware or hardware shall be uninterrupted or error free If Agilent Technologies 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
120. ies N6700 User s Guide D Service Types of Service Available 152 Operating Checklist 152 Repackaging for Shipment 152 Disassembly 153 Error Messages 156 This chapter discusses the procedures involved for returning a failed instrument to Agilent Technologies for service or repair Actual repair is done through unit exchange 151 Types of Service Available Types of Service Available Operating Checklist If your instrument fails during the warranty period see Warranty Agilent Technologies will replace or repair it free of charge After your warranty expires Agilent Technologies will replace or repair it at a competitive price The standard repair process is whole unit exchange The replacement units are fully refurbished and are shipped with new calibration certificates Contact your nearest Agilent Technologies Service Center They will arrange to have your instrument repaired or replaced Before returning your instrument to Agilent Technologies for service or repair check the following items Is the instrument inoperative Verify that the ac power cord is connected to the instrument Verify that the front panel On Standby switch has been pushed Is the display working If the display is hard to read but front panel LED is lit and the fans are working the display contrast setting may be too light or too dark Use the front panel menu to set the display contrast Does the instrument fail se
121. ine instead for USB communication USBaddress USBO 2391 1799 US00000002 Tnitialize the VISA COM communication Set ioMgr New AgilentRMLib SRMCls Set Instrument New VisaComLib FormattedI0488 Set Instrument IO ioMgr Open GPIBaddress This variable can be changed to program any channel in the mainframe channel 1 channel 1 With Instrument Send a power reset to the instrument WriteString RST Query the instrument for the IDN string WriteString IDN IDN ReadString Set the voltage mode to list WriteString VOLT MODE LIST amp channel Set the current mode to list WriteString CURR MODE LIST amp channel Series N6700 User s Guide Send the voltage list WriteString LIST VOLT Send the Current list WriteString LIST CURR Send the dwell points WriteString LIST DWEL Turn the output on WriteString OUTP ON points amp voltPoints amp amp channel points amp currPoints amp amp channel amp dwellPoints amp amp channel amp channel Set the trigger source to bus WriteString TRIG TRAN SOUR BUS amp channel Initiate the transient system WriteString INIT TRAN Trigger the unit WriteString TRG amp channel Check instrument for any errors WriteString Syst err ErrString ReadString give message if there If Val ErrString Then MsgBox End If End With End Sub Series N6700
122. inframe To install a module align the module over the alignment pins and push it down onto the mainframe connector Filler modules install in the same manner as power modules 153 Disassembly Step 4 Fasten the module to the mainframe Use the two screws from the power module or filler module and install them at either end of the module Step 5 Replace the blower cover when finished Be careful not to bend the RFI clips on the edge of the cover when sliding it under the lip of the the output modules Ey opeeee pesse 154 Series N6700 User s Guide Disassembly Accessing the Calibration switch SHOCK HAZARD FAN HAZARD Turn off the mainframe and disconnect its power cord before attempting any of the following procedures Step 1 Step 2 Step 3 CAUTION Remove the blower cover cover is shown in the previous figure Remove three screws from the top of the cover and two screws on the sides Tilt the cover up and slide it out Remove the GPIB carrier board cover Remove the three screws along the side of the unit counting from the rear panel Then remove the screw at the end of the carrier board that attaches the cover to the board refer to the following figure Lift off the cover The calibration switch is located under the ribbon cable close to the GPIB board Change the calibration switc
123. inframes will disable all of them without intervention either by the controller or external circuitry You can also connect the Inhibit input to a manual switch that will short the Inhibit pin to common whenever it is necessary to disable all output channels in the mainframe You can also use the Fault output to drive an external relay circuit or signal other devices whenever a user definable fault occurs Bi directional Digital 1 0 When the Digital Control pins are configured for bi directional digital I O the pins function as a bi directional input outputs the state of which can be controlled and read at all times The ground reference for the I O pin is Signal Common on pin 4 The DIGital OUTPut DATA command controls the state of the output pins and the DIGital OUTPut DATA query reads the state of the pins according to the following bit assignments Pin Bit 1 0 2 1 3 2 The input output pin can be used to control both relay circuits as well as digital interface circuits The following figure illustrates typical relay circuits as well as digital interface circuit connections using the Digital I O functions For a complete description of the electrical characteristics of the digital I O port see Appendix A 146 Series N6700 User s Guide 16 5 V max 1234 Coil Current 100 mA max HI ji o T Relay driver Ports 0 1 2 contains internal clamp diodes for inductive flyback A Re
124. ing the correct password The password is set at the factory to 0 zero Once calibration has been entered the password can be changed by the user The password must be numeric and can be up to 15 digits in length lf the password is incorrect an error occurs If the active password is lost the calibration function can be recovered by setting an internal switch that resets the password to 0 If Calibration is inhibited by switch setting appears the internal switch is set to prevent the calibration from being changed Calibrate only ONE channel at a time The calibration commands accept only a single channel number for the channel parameter You do not have to do a complete calibration If appropriate you may calibrate only the voltage or current functions and then save the calibration constants However the voltage or current calibration sequence must be performed in the order shown in this appendix in its entirety As each calibration sequence is completed the instrument calculates new calibration constants and begins using them However these constants are not saved in nonvolatile memory until a SAVE command is explicitly given This can be done after each voltage or current sequence is done or once after all calibration is complete Exit the calibration mode Any channels that were calibrated but not saved revert to their previous calibration constants Note that an RST command also sets the calibration state to OFF
125. ion SPSo 1 eco 7 ZFHLOH Y In this Book Specific chapters in this manual contain the following information Quick Reference Chapter 1 is a quick reference section that helps you quickly become familiar with your Agilent N6700 Modular Power System It describes the differences between the various modules in the power system Installation Chapter 2 describes how to install your power system It describes how to connect various loads to the output It discusses remote sensing as well as parallel and series operation Getting Started Chapter 3 describes how to set the voltage current over voltage protection and turn on the output It also describes how to configure the remote interface Operating the Power System Chapter 4 describes how to use the advanced features of the power system using the front panel menus and the corresponding SCPI commands Introduction to Programming Chapter 5 gives a brief overview of the SCPI command structure and basic programming concepts Language Dictionary Chapter 6 describes all of the SCPI programming commands Programming Examples Chapter 7 provides Visual Basic example programs that illustrate some common applications Specifications Appendix A describes specifications and supplemental characteristics Verification and Calibration Procedures Appendix B explains the verification and calibration procedures Using the Digital Port Appendix C describes how to configure
126. ion This only applies to Agilent Models N6761A and N6762A Step 13 Remove all loads from the output Select the low current measurement range The following example selects the 0 1 amp low current measurement range of channel 1 The value to program a range must be the maximum current of the range Front Panel SCPI Command Select CAL CURR MEAS 0 1 1 System Cal Sequences Imeas Step 14 Re connect the precision shunt resistor to the output and connect the DVM across the shunt Select the first current calibration point Note that in this case only one calibration point needs to be entered Front Panel SCPI Command Select Next The information field CAL LEV P1 should indicate Enter P1 data OPC Step 15 Calculate the shunt current I V R and enter the data Front Panel SCPI Command Select the Measured Data field Enter CAL DATA lt data gt the data from the external DVM Press Select when done Press Next to finish calibration Current Downprogrammer Calibration Step 16 Remove all loads from the output This procedure is automatic and takes a few seconds Front Panel SCPI Command Select CAL DPRog 1 System Cal Sequences DPprog TORE Then select Next Series N6700 User s Guide 139 Calibration Peak Current Limit Calibration Steps 17 through 21 only apply to Agilent Models N6751A N6752A N6761A and N6762A Step 17 Connect the 25 ohm load resistor across the output terminals see the equi
127. it before applying power Note the instrument s external markings described under Safety Symbols Ground the Instrument This product is a Safety Class 1 instrument provided with a protective earth terminal 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 Fuses The instrument contains an internal fuse which is not customer accessible Series N6700 User s Guide 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 Only qualified service trained personnel who are aware of the hazards involved should remove instrument covers Always disconnect the power cable and any external circuits before removing the instrument cover Do Not Modify the Instrument Do not install substitute parts or perform any unauthorized modification to the product Return the product to an Agilent Sales and Service Office for service and repair to ensure that safety features are maintained In Case of Damage Instruments that
128. l load Voltage settling band 80mV 80mV 200mV 200mV 200mV Time lt 200 us lt 200 us lt 200 us lt 200 us lt 200 us 1 With an output change from no load to full load up to a maximum load lead drop of 1 V per lead 2 Applies from minimum to maximum programming range see Supplemental Characteristics Series N6700 User s Guide 109 Supplemental Characteristics Supplemental Characteristics Agilent Models N6751A N6752A and N6761A N6762A N6751A N6752A N6761A N6762A Programming Ranges Voltage high range 20 mV 51V 15mV 51V Voltage low range lt 5 5 V N A 12mV 5 5V Current high range 10 mA 5 14 10 mA 10 2A 1 mA 1 53 A 1 mA 3 06 A Current low range lt 0 1 A N A 0 1 mA 0 1 A NOTE 1 Programming Resolution Voltage high range 3 5 mV 880 uV Voltage low range lt 5 5 V N A 90 uV Current high range 3 25 mA 60 uA Current low range lt 0 1 A N A 2 uA Measurement Resolution Voltage high range 1 8 mV 440 uV Voltage low range lt 5 5 V N A 44 uV Current high range 410 uA 30 uA Current low range lt 0 1 A N A 1 uA Programming Temperature Coefficient per C Voltage high range 18 ppm 160 uV 18 ppm 140 uV Voltage low range lt 5 5 V N A 40 ppm 70 uV Current high range 100 ppm 45 uA 33 ppm 10 uA Current low range lt 0 1 A N A 60 ppm 1 5 uA Measurement Temperature Coefficient per C Voltage high range 25 ppm 35 uV 23 ppm 40 uV Voltage low range lt 5 5 V
129. l models Refer to Chapter 1 Model Differences for model specific information SOURce CURRent LEVel1 IMMediate AMPLitude lt value gt MIN MAX lt chanlist gt SOURce CURRent LEVel IMMediate AMPLitude lt chanlist gt SOURce CURRent LEVel1 TRIGgered AMPLitude lt value gt MIN MAX lt chanlist gt SOURce CURRent LEVel TRIGgered AMPLitude lt chanlist gt These commands set the immediate and the triggered current level of the output channel The values are programmed in amperes The immediate level is the output current setting The triggered level is a stored value that is transferred to the output when a Step transient is triggered Note that the SOURce CURRent command is coupled with SOURce CURRent RANGe The RST value MIN SOURce CURRent MODE FIXed STEP LIST lt chanlist gt SOURce CURRent MODE lt chanlist gt These commands determine what happens to the output current when the transient system is initiated and triggered FlXed The output voltage remains at the immediate value STEP The output goes to the triggered level when a trigger occurs LIST The output follows the programmed step value when a trigger occurs This function does not apply to all models see Chapter 1 Model Differences The RST value FIXed SOURce CURRent PROTection STATe ON OFF lt chanlist gt SOURce CURRent PROTection STATe lt c
130. lay Circuits Digital Input Only Series N6700 User s Guide Digital Control Port 123 4 HHHH Uan Digital Output Ports 0 1 2 TTL AS CMOS HC HHHH aa Digital Input Ports 0 1 2 B Digital Interface Circuits When an I O pin is configured for Digital Input only the pin functions as a digital input pin The ground reference for the I O pin is Signal Common on pin 4 The pin status reflects the true condition of the external signal that is applied to the pin The pin state is not affected by the value of the digital output word 147 Configuring the Digital Control Port Configuring the Digital Control Port You can configure the Digital Control pins to perform five different functions These pins can be programmed either from the front panel or using SCPI commnds External Trigger Each of the three pins can be configured as either trigger inputs or trigger outputs The polarity of the pins can also be configured When you program trigger polarity POSitive means a rising edge and NEGative means a falling edge Front Panel SCPI Command Select System DigPort then either To select the trigger output function Pin 1 Pin2 or Pin 3 for pin 1 Select Function and configure the Bie eee PUNCH IQUI pin as TrigIn or TrigOut To select the trigger input function for pin 2 Go back one level select Polarity DIG PIN2 FUNC TINP then either Positive or Negative
131. le ranges you can select a lower range if you need better output resolution Front Panel Press the Channel key to select an output then press the Voltage key Select Low range and press Select Enable the Output Front Panel To enable one output press the Channel key to select the output then press the On Off key To enable disable ALL outputs with the On Off key select System Preference Keys Check the On Off couple dialog box The ON Off key will now be active on ALL output channels SCPI Command To select the lower range program a value that falls within the range CURR RANG 1 1 SCPI Command To enable only output 1 OUTP ON 1 To enable outputs 1 4 OUTP ON 1 4 Series N6700 User s Guide Programming the Output Because of internal circuit start up procedures and any installed relay options the output on command may take between 35 and 50 milliseconds to complete its function Conversely the output off command may take between 20 and 25 milliseconds to complete its function If you need to mitigate this built in delay you can program the output to zero volts rather than using the output on off command Sequence Multiple Outputs You can specify a turn on and turn off delay to control the power up and power down sequencing of the output channels Front Panel SCPI Command Press the Channel key to select an To program a 50 millisecond turn on output Select the Output Dela
132. le voltage drop developed in the load leads the terminal block strapping patterns discussed thus far do not provide the best possible voltage regulation at the load The remote sensing connections shown in the figure below improve the voltage regulation at the load by monitoring the voltage there instead of at the output terminals This allows the power system to automatically compensate for the voltage drop in the load leads Remote sensing is especially useful for CV operation with load impedances that vary or have significant lead resistance It has no effect during CC operation Because sensing is independent of other power system functions remote sensing can be used regardless of how the power system is programmed Note that with remote sensing the voltage readback circuit monitors the load voltage through the sense terminals The OVP circuit senses at the main output terminals and not through the sense terminals Due to the voltage drop in the load leads the voltage sensed by the OVP circuit could be higher than the voltage being regulated at the load Therefore you must take into account the additional voltage drop in the load leads when setting the over voltage trip point Series N6700 User s Guide 21 Remote Sense Connections Remote Sense Connections Remember to turn off the power system before making or changing any connections on the rear panel terminal blocks Connect the unit for remote sensing by first disconnecting
133. lf test Remove all external connections to the instrument Check that modules are installed next to each other starting with slot 1 If there are any empty slots or filler modules between the power modules the power system will not operate Turn off the unit and cycle power to run self test again Repackaging for Shipment 152 If the unit is to be shipped to Agilent Technologies for service or repair be sure to Attach a tag to the unit identifying the owner and indicating the required service or repair Include the model and serial number Place the unit in its original container with the appropriate packaging material and secure the container with strong tape or metal bands If the original shipping container is not available place your unit in a container that will ensure at least 4 inches of compressible packaging material around all sides for the instrument Use static free packaging materials to avoid additional damage to your unit Agilent Technologies suggests that you always insure shipments Series N6700 User s Guide Disassembly Disassembly Electrostatic Discharge ESD Precautions Required Tools Almost all electrical components can be damaged by electrostatic discharge ESD during handling Component damage can occur at electrostatic discharge voltages as low as 50 volts The following guidelines will help prevent ESD damage when servicing the instrument or any electronic device Di
134. ll pins Positive Screen contrast 50 Key clicks Enabled Calibration date March 5 2003 On Off key affects all channels Disabled Calibration password 0 Screen saver Enabled Output Inhibit mode Off Screen saver delay 60 minutes Saved states RST command The factory shipped interface settings described above are optimized for connecting your power system to a site network They will also work well for other network configurations However if your power system is connected either to an isolated subnet or a private LAN directly connected to a PC the following configuration changes are recommended for improved performance When connected to an isolated subnet In the System Interface LAN DNS dialog box select Use the following DNS server However leave the DNS server address field blank When connected to a private LAN In the System Interface LAN IP dialog box turn off Enable DHCP Turning DHCP off will reduce the time that the power system requires when it is turned on to fully configure a network connection This normally takes several minutes Series N6700 User s Guide 4 Operating the Power System Programming the Output 40 Synchronizing Output Steps 42 Making Measurements 45 System Related Operations46 Programming High Speed Test Extensions 49 This chapter contains examples on how to operate your power system from the front panel and over the remote interface using SCPI commands Refer to chapters 5 and 6
135. lly exceed the maximum number of write cycles and cause the memory to fail This command stores the present state of the power system to the specified location in non volatile memory Up to 2 states can be stored in locations 0 and 1 Any state previously stored in the same location will be overwritten Use the RCL command to retrieve instrument states Refer to RST Settings at the beginning of this chapter for a list of instrument settings that can be saved 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 the Output Power On state is set to RCLO Note that list data and the calibration state is not saved as part of the SAV operation This means that all list data that is sent to the instument will be lost when the power system is turned off Also data saved in non volatile memory described in the Non volatile Factory Settings table at the end of chapter 3 is not affected by the SAV command This query causes the power system to do a self test and report any errors A 0 indicates the power system passed self test A 1 indicates one or more tests failed Selftest errors are written to the error queue see Appendix D Note that TST also forces an RST command Series N6700 User s Guide Trigger Subsystem Trigger Subsystem The Trigger subsystem consists of the Abort Initiate and Trigger commands Abort commands cancel any
136. lt Bool gt chanlist SCPI Command Summary Description Resets latched protection Enables disables channel coupling for protection faults Sets over current protection programming delay Sets the relay state independently of the output state Note 3 Selects the current measurement range Note 4 Selects the measurement function Defines the trigger offset in the measurement sweep Note2 Defines the number of data points in the measurement Note 2 Sets the measurement sample interval Note 2 Selects the voltage measurement range Note 4 Sets measurement window function Note 2 Sets the output current Sets the triggered output current Sets the current trigger mode Enables disables over current protection on the selected output Sets the output current range Note 4 Reads the state of the digital port pins Sets the digital port Sets the selected pin s function PIN1 only 2PIN3 only Sets the selected pin s polarity Sets the list repeat count Note 2 Sets the current list Note 2 Returns the number of current list points Note 2 Sets the list of dwell times Note 2 Returns the number of dwell list points Note 2 Specifies how the list responds to triggers Note 2 Sets the list termination mode Note 2 Sets the steps to generate triggers at the Begin Of Step Note 2 Returns the number of beginning of step list points Note 2 Sets the steps to generate triggers at the End Of Step Note 2 Returns the n
137. lt in Web server lets you control the instrument directly from an internet server browser on your computer Real time status The front panel indicates the status of each output It also indicates when a information protection shut down has occurred Refer to Chapter 3 for details Module Each module has identifying data stored in non volatile memory Information identification includes model number serial number and options This information can be displayed on the front panel Model Differences DC Power Modules Auto Ranging Modules Precision Modules N6731A N6742A N6751A N6752A N6761A N6762A N6735A N6745A Output power rating 50 W1 100 W2 50 W 100 W 50 W 100 W Auto ranging output capability NO NO YES YES YES YES Precision output and measurement capability NO NO NO NO YES YES Low voltage output and measurement range NO NO NO NO YES YES Low current output and measurement range NO NO NO NO YES YES Simultaneous voltage and current measurement NO NO NO NO YES YES Output list capability Test Extensions NO NO Option Option YES YES Array readback capability Test Extensions NO NO Option Option YES YES Programmable sample rate Test Extensions NO NO Option Option YES YES 1Model N6735A has a maximum output of 40 W 2Models N6742A and N6745A have a maximum output of 80 W Series N6700 User s Guide 9 The Front Panel At a Glance The Front Panel At a Glance Display Navigation keys Output keys Turns off after 1 hour of
138. m any channel in the mainframe channel 1 channel 1 Tnitialize the VISA COM communication Set ioMgr New AgilentRMLib SRMCls Set Instrument New VisaComLib FormattedI0488 Set Instrument IO ioMgr Open GPIBaddress With Instrument Send a power reset to the instrument WriteString RST Query the instrument for the IDN string WriteString IDN 104 Series N6700 User s Guide Digitizer Programming Example IDN ReadString Put the Voltage into step mode which causes it to transition from one voltage to another upon receiving a trigger WriteString VOLT MODE STEP amp channel program to voltage setting WriteString VOLT amp Str Voltage amp amp channel Go to final value WriteString VOLT TRIG amp Str finalVoltage amp amp channel Turn the output on WriteString OUTP ON amp channel Set the bus as the transient trigger source WriteString TRIG TRAN SOUR BUS amp channel Set the number of points for the measurement system to use as an offset WriteString SENS SWE OFFS POIN amp Str measOffset amp amp channel Set the number of points that the measurement system uses WriteString SENS SWE POIN amp Str measPoints amp amp channel Set the time interval between points WriteString SENS SWE TINT amp Str timeInterval amp amp channel Set the measurement trigger source WriteString TRIG ACQ SOUR BUS a
139. ment select a trigger source from the following Bus Selects GPIB device trigger TRG or lt GET gt Group Execute Trigger Pin lt number gt Selects a pin on the external port connector as the trigger source You can specify pins 1 2 or 3 The selected pin must be configured as a Trigger Input in order to be used as a trigger source see Appendix C Transient Selects the output channel s transient system as the trigger source lt channel gt lt channel gt specifies the channel When you select a channel you must also set up that channel s transient system to generate a trigger out signal Refer to Generating Trigger Out Signals and Program an Arbitrary List earlier in this chapter Use the following commands to select a trigger source Front Panel SCPI Command Not Available To select Bus triggers for output 1 TRIG SOUR BUS 1 To select Digital pin triggers TRIG SOUR PIN lt n gt 1 where n is the pin number To select Transient output triggers TRIG SOUR TRAN lt n gt 1 where n is the output channel that will generate the trigger signal Series N6700 User s Guide 57 Programming High Speed Test Extensions Initiate the Measurement Trigger System Next you must initiate or enable the measurement trigger system When the power system is turned on the trigger system is in the idle state In this state the trigger system is disabled ignoring all triggers The INITiate commands enable the meas
140. mmunication TCPIPaddress TCPIPO 141 25 36 214 use the following line instead for USB communication USBaddress USBO 2391 1799 US00000002 Tnitialize the VISA COM communication Set ioMgr New AgilentRMLib SRMCls Set Instrument New VisaComLib FormattedI0488 Set Instrument IO ioMgr Open GPIBaddress This variable can be changed to program any channel in the mainframe channel 1 channel 1 VoltSetting 3 CurrSetting 1 5 amps overvoltSetting 10 With Instrument Series N6700 User s Guide End End Sub Output Programming Example Send a power reset to the instrument WriteString RST Query the instrument for the IDN string WriteString IDN IDN ReadString Set voltage WriteString VOLT amp Str VoltSetting amp amp channel Ensure that over voltage protection on WriteString VOLT PROT STAT ON amp channel Set the over voltage level WriteString VOLT PROT LEV amp Str overVoltSetting amp amp channel Turn on over current protection WriteString CURR PROT STAT ON amp channel Set current level WriteString CURR amp Str CurrSetting amp amp channel Turn the output on WriteString OUTP ON amp channel Measure the voltage WriteString MEAS VOLT amp channel MeasureVoltString ReadString MsgBox Measured Voltage is amp MeasureVoltString amp At channel amp channel Check instrument f
141. mp channel Initiate the measurement trigger system WriteString INIT ACQ amp channel Initiate the transient trigger system WriteString INIT TRAN amp channel Trigger the unit WriteString TRG Read back the voltage points WriteString FETC ARR VOLT amp channel VoltPoints ReadList Print the first 10 voltage points For i 0 To 9 Debug Print i VoltPoints i Next i Check instrument for any errors WriteString Syst err ErrString ReadString give message if there is an error If Val ErrString Then MsgBox Error in instrument amp vbCrLf amp ErrString End If End With Command1 Enabled True End Sub Series N6700 User s Guide 105 Series N6700 User s Guide A Specifications Performance Specifications 108 Supplemental Characteristics 110 Auto Ranging Characteristic 115 Outline Diagram 115 This chapter lists the specifications and supplemental characteristics of the Agilent N6700 Modular Power System A dimensional line drawing of the mainframe is included at the end of the chapter Unless otherwise noted specifications are warranted over the ambient temperature range of 0 to 55 C and derated above 40 C Sensing is at the output terminals of the power system after a 30 minute warm up period Sense terminals must be externally jumpered to their respective output terminals Supplemental characteristics are not warranted but are descriptions of performance d
142. n level with CALibrate LEVel for the value being entered Data values are expressed in base units either volts or amperes depending on which function is being calibrated CALibrate DATE lt date gt lt channel gt CALibrate DATE This command stores the date the module was last calibrated The calibration date is stored in nonvolatile memory Enter any ASCII string up to 15 characters The query returns the date The firmware does not interpret the string format The information is not used by the firmware The command is only provided to store the calibration date CALibrate DPRog lt channel gt This command initiates calibration of the current downprogrammer CALibrate LEVel P1 P2 This command selects the data point in the calibration sequence P1 is the first calibration point P2 is the second calibration point 72 Series N6700 User s Guide Calibration Subsystem Some calibration sequences may require some settling time after sending CAL LEV but before reading the data from the DVM and sending CAL DATA CALibrate PASSword lt password gt This command lets you change the calibration password A new 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 calibration mode is unrestricted The default password is the model number CALibrate SAVE This command saves c
143. n the highest possible range an error will result Queries the full scale current range setting of an output channel Sets the current of the specified output channel Queries the present current setting of the specified output channel The response is a real number Increases or decreases the output channel current in steps If the step value lt x gt is positive output current will increase by the step value if the step value is negative the output current will decrease by the step value Stepping beyond the active operating range causes an error Does nothing Always returns a 1 Enables the over current protection circuit for the specified output channel This circuit when enabled causes the output to go to the off state when the output is in CC mode On off is a 1 to turn on enable or a 0 to turn off disable the circuit Queries the over current protection circuit on off status for the specified output channel Response is either a 1 on or a 0 off Returns the specified output channel to its previous settings after it has been turned off by a protection shutdown Turns the specified output channel on or off lt on off gt equals 1 to turn the output on and equals 0 to turn the output off Queries whether the specified output channel is turned on or off The response is either 1 on or O off SENS CURR RANG SENS CURR RANG CURR CURR LIST CURR None None CURR PROT STAT
144. nction for which you want to generate a pulse to List mode This example programs a voltage pulse Front Panel SCPI Command Select Transient Volt Mode To program output 1 use Scroll to List and press Select VOLT MODE LIST 1 Set the amplitude and width of the pulse For example to generate a pulse with an amplitude of 15 V and a pulse width of 1 second use Front Panel SCPI Command Select Transient List Config To program output 1 use Select List Step 0 and enter a LIST VOLT 15 1 voltage value of 15 Press Select LIST DWEL 1 1 Enter a dwell value of 1 for List Step 0 and Press Select Set the list pacing to Auto so that as each dwell time elapses the next step is immediately output Front Panel SCPI Command Select Transient List Pace LIST STEP AUTO 1 Select Dwell and press Select If you only wish to program a single pulse skip steps 4 and 5 and go to step 6 If you want to generate a pulse train you must specify the off time between pulses To do this you must program another step For a voltage list you must specify an amplitude and an off time For example to program an off time of 2 seconds with an amplitude of 0 V between pulses use Front Panel SCPI Command Select Transient List Config To program output 1 use Select List Step 1 and enter a LIST VOLT 15 0 1 voltage value of 0 Press Select LIST DWEL 1 2 1 Enter a dwell value of 2 for List Step 1 and Press Selec
145. nd close as the output is turned off and on Separate delays can be programmed for the off to on and the on to off transition using OUTPut DELay RISE and OUTput DELay FALL The RST value OFF Because of internal circuit start up procedures and any installed relay options the output on command may take between 35 and 50 milliseconds to complete its function Conversely the output off command may take between 20 and 25 milliseconds to complete its function If you need to mitigate this built in delay you can program the output to zero volts rather than using the output on off command OUTPut STATe DELay FALL lt delay gt MIN MAX lt chanlist gt OUTPut STATe DELay FALL lt chanlist gt This command sets the delay in seconds that the instrument waits before disabling the specified output It affects on to off transitions including changes in the OUTPut STATe as well as transitions due to changes in the voltage range or current range It does NOT affect transitions to off caused by protection functions Delay times can range from 0 to 1 023 seconds in increments of 1 millisecond This command allows multiple output channels to turn off in a controlled manner Each output will not turn off until its delay time has elapsed The RST value 0 Series N6700 User s Guide 71 Output Subsystem OUTPut STATe DELay RISE lt delay gt MIN MAX lt chanlist gt OUTPut STATe DELay RISE lt chanlist gt
146. nd current limit You must initiate the output trigger system before you can send any triggers When sent the output trigger will Initiate an output change as specified by the Current Triggered or Voltage Triggered commands Clears the WTG tran bit in the Status Operation Condition register after the transient trigger sequence has completed TRIGger TRANsient SOURce BUS PIN lt pin gt TRANsient lt chan gt lt chanlist gt TRIGger TRANsient SOURce TRG 98 BUS PIN lt pin gt TRANsient lt chan gt This command selects the trigger source for the output trigger system The following trigger sources can be selected GPIB device trigger TRG or lt GET gt Group Execute Trigger Selects an output port connector pin Pins 1 3 can be configured as external trigger sources The SOURce DIGital PIN lt n gt FUNCtion command programs the function of each pin The SOURce DIGital PIN lt n gt POLarity command programs the polarity of each pin Selects the transient system of one of the output channels as the trigger source The following commands are used to generate triggers from the transient system SOURce STEP TOUTput SOURce LIST TOUTput BOSTep and SOURce LIST TOUTput EOSTep The RST value BUS This 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 Series N6700 User s
147. nd the operating range will cause a number range error 166 Series N6700 User s Guide Index A ABOR ACO 97 ABOR TRAN 97 airflow 17 115 C calibration 133 current downprogrammer 139 current programming and measurement 137 enable 134 equipment 118 low range current measurement 139 low range current programming 138 low range voltage 135 low range voltage measurement 136 password 73 141 peak current limit 140 procedure 134 save and exit 141 switches 133 155 voltage common mode rejection 136 voltage programming and measurement 134 calibration commands CAL CURR 72 CAL CURR PEAK 72 calibration commands 72 CAL CURR MEAS 72 CAL DATA 72 CAL DATE 72 CAL DPR 72 CAL LEV 72 CAL PASS 73 CAL SAVE 73 CAL STAT 73 CAL VOLT 73 CAL VOLT CMRR 73 CAL VOLT MEAS 73 Caution 3 CC 89 load effect 124 source effect 124 channel location 17 parameter 63 range 63 Series N6700 User s Guide cleaning 17 CME 92 combining commands 61 command combining 61 completion 66 coupling 62 synchronization 66 common commands 67 CLS 91 ESE 92 ESR 92 IDN 95 OPC 92 OPT 95 RCL 95 RDT 96 RST 96 SAV 96 SR 93 STB 93 TRG 98 TST 96 WAI 93 combining 61 compatibility command summary 163 differences 162 models 161 connections multiple load 20 negative voltage 20 parallel 23 positive voltage 20 remote sensing 22 series 24 control p
148. nerate an SRQ to the controller The query returns the current state of SRE 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 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 A serial poll clears RQS but not MSS When MSS is set it indicates that the power system has one or more reasons for requesting service Bit Position 7 6 5 4 3 2 1 0 Bit Value 128 64 32 16 8 4 Bit Name OPER MSS ESB MAV QUES ERR RQS OPER Operation status summary MAV Message available MSS Master status summary QUES Questionable status summary ROS Request for service ERR Error queue not empty ESB Event status byte summary This command instructs the power system 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 power system a Device Clear command 93 System Commands System Commands System commands control system functions that are not directly related to output control measurement or status functions Common c
149. nitiates calibration of the voltage measurement range The value that you enter selects the range Series N6700 User s Guide 73 Measurement Subsystem Measurement Subsystem The measurement subsystem consists of Measure Fetch and Sense commands Measure commands measure the output voltage or current They trigger the acquisition of new data before returning the reading Measurements are performed by digitizing the instantaneous output voltage or current for a specified time interval storing the results in a buffer and calculating the average value Use Measure commands when the measurement does not need to be synchronized with any other event Fetch commands return a reading computed from previously acquired data If you take a voltage measurement you can fetch only voltage data If you take a current measurement you can fetch only current data Use Fetch commands when it is important that the measurement be synchronized with a triggered event Sense commands controls the current measurement range the bandwidth detector of the power system and the data acquisition sequence The FETCh ARRay MEASure ARRay and SENSe commands do not apply to all models Refer to Chapter 1 Model Differences for model specific information FETCh ARRay CURRent DC lt chanlist gt FETCh ARRay VOLTage DC lt chanlist gt MEASure ARRay CURRent DC lt chanlist gt MEASure ARRay VOLTage DC lt chanlist gt These q
150. nning 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 the short form is used in the next two examples OUTP PROT CLE 1 STAT OPER COND 1 The following message shows how to combine commands from different subsystems as well as within the same subsystem VOLT LEV 7 5 1 PROT STAT ON 1 CURR LEV 0 25 1 Note the use of the optional header LEVel to maintain the correct path within the subsystems and the use of the root specifier to move between subsystems Including Common Commands Using Queries Series N6700 User s Guide 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 insert them anywhere in the message OUTPut OFF 1 RCL 1 OUTPut ON 1 Observe the following precautions with queries Add a blank space between the query indicator and any subsequent parameter such as a channel list Allocate the proper number of variables for the returned data Read back all the results of a query before sending another command to the power system Otherwise a Query Interrupted error will occur and the unreturned data will be lost 61
151. nt DC RANGe UPPer lt value gt MIN MAx lt chanlist gt SENSe CURRent DC RANGe UPPer lt chanlist gt This command selects a DC current measurement range on models that have multiple ranges The value that you enter must be higher than the maximum current that you expect to measure Units are in amperes The instrument selects the range with the best resolution for the value entered When queried the returned value is the maximum DC current that can be measured on the range that is presently set Refer to Appendix A for the available ranges for each model The RST value the highest available range SENSe FUNCtion VOLTage CURRent lt chanlist gt SENSe FUNCtion This command selects a measurement function on models that do not have simultaneous voltage and current measurement cabability This command is required so that the acquisition system knows which measurement function to acquire when a measurement is triggered The RST value VOLTage SENSe SWEep OFFSet POINts lt points gt MIN MAX lt chanlist gt SENSe SWEep OFFSet POINts lt chanlist gt This command defines the offset in a data sweep when an acquire trigger is used on models that have measurement controls Programmed values can range from 4095 through 2 000 000 000 2E9 Negative values represent data samples taken prior to the trigger Positive values represent the delay after the trigger occurs but before the
152. nt lt Bool gt chanlist OUTPut STATe lt Bool gt NORelay chanlist DELay FALL lt NRf gt chanlist RISE lt NRf gt chanlist INHibit MODE LATChing LIVE OFF PON STATe RST RCLO Description Resets the measurement trigger system to the Idle state Resets the transient trigger system to the Idle state Calibrates the output current programming Calibrates the current measurement Calibrates the peak current limit Note 1 Enters the calibration value Sets the calibration date Calibrates the current downprogrammer Advances to the next calibration step Sets the numeric calibration password Saves the new cal constants in non volatile memory Enables disables calibration mode Calibrates the output voltage programming Calibrates the voltage common mode rejection ratio Note 1 Calibrates the voltage measurement Returns the average output current Returns the average output voltage Returns the instantaneous output current Note 2 Returns the instantaneous output voltage Note 2 Enables the measurement system to receive triggers Note 2 Enables the output transient system to receive triggers Enables disables continuous transient triggers Enables disables the specified output channel s Sets the output turn off sequence delay Sets the output turn on sequence delay Sets the remote inhibit input Programs the Power On State 68 Series N6700 User s Guide SCPI Command OUTP
153. ntains installation checkout and front panel information 5969 2908 Rack Mount Kit A kit for rack mounting in a 19 inch EIA rack cabinet Includes N6700 60009 2 Front Ears 5002 2816 2 Rear Ears 5002 2815 2 Rear Ear extender support 5002 2814 6 Front ear attachment screws 8 mm 0515 0372 4 Rear extender attachment screws 6 mm 0515 0430 4 Front rail dress screws 0570 1577 6 Rear rail screws 2680 0281 10 Sheet metal clip nuts for attaching to rack frame 0590 0804 Options Option Description 054 High speed Test Extensions Includes digitized output measurements and output list capability Available for Agilent Models N6751A N6752A Included with Agilent Models N6761A N6762A 761 Output relays Includes 2 DPDT galvanic disconnect relays Disconnects both output and sense terminals Available for all Agilent Models 14 Series N6700 User s Guide Inspecting the Unit N Installing the Unit Inspecting the Unit When you receive your power system inspect it for any obvious damage that may have occurred during shipment If there is damage notify the shipping carrier and nearest Agilent Sales and Support Office immediately Refer to Appendix D for more information Until you have checked out the power system save the shipping carton and packing materials in case the unit has to be returned Safety Considerations Environment This power system is a Safety Class 1 instrument which means it has a p
154. o the initiated state which enables the power system to receive triggers To initiate the trigger system use Front Panel SCPI Command Select the Transient Control To initiate the output trigger system Scroll to Initiate and press Select for all four outputs INIT TRAN 1 4 After a trigger is received and the action completes the trigger system returns to the idle state Thus it will be necessary to enable the system each time a triggered action is desired Trigger the Output 44 The trigger system is waiting for a trigger signal in the initiated state You can immediately trigger the output as follows Front Panel SCPI Command Select Transient Control To generate an immediate trigger on Select Trigger to generate an channel 1 immediate trigger signal regardless TRIG TRAN 1 of the trigger source setting Alternatively if the trigger source is BUS you can also program a TRG or an IEEE 488 lt get gt command When a trigger is received the triggered functions are set to their programmed trigger levels When the triggered actions are completed the trigger system returns to the idle state As previously discussed a trigger can also be generated by another output channel or by a trigger signal applied to an input pin on the digital port connector If any of these systems are configured as the trigger source the instrument will wait indefinitely for the trigger signal If the trigger does not occur you mus
155. ocal state determines the instrument s remote local state The remote local state is unaffected by RST or any SCPI commands other than SYSTem COMMunicate RLState At power on the state is LOCal Series N6700 User s Guide SYSTem ERRor SYSTem VERSion IDN OPT RCL lt state gt System Commands This query returns the next error number and its corresponding message string from the 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 D for error codes 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 This query requests the power system to identify itself It returns a string of four fields separated by commas Field Information Agilent Technologies Manufacturer N67xxA Mainframe model number followed by a letter suffix 0 Zero or Mainframe serial number if available lt A gt XX XX Revision levels of firmware This query requests the mainframe to identify any installed options A 0 indicates no options are installed This command restores the power system to a state that was
156. of errors can be avoided by sending the both level and range commands in the same SCPI message When the range and setting information is received as a set no range setting conflict occurs The RST value the highest available range If programming a range value causes a range change to occur while the output is enabled the output will be temporarily disabled while the range switch occurs The transition from on to off and then from off to on will also be delayed by the settings of OUTPut DELay FALL and OUTPut DELay RISE SOURce DIGital INPut DATA This query reads the state of the digital control port The query returns the state of pins 1 2 and 3 in bits 0 1 and 2 respectively SOURce DIGital OUTPut DATA lt value gt SOURce DIGital OUTPut DATA This command sets the output data on the digital control port when that port is configured for Digital I O operation The port has three signal pins and a digital ground pin In the binary weighted value that is written to the port pin 1 is controlled by bit 0 pin 2 is controlled by bit 1 and Pin 3 is controlled by bit 2 The query returns the last programmed value of bits 0 1 and 2 To read the actual state of the pin use SOURce DIGital INPut DATA Series N6700 User s Guide 81 Source Subsystem SOURce DIGital PIN1 FUNCtion DIO DINPut TOUTput TINPut FAULt SOURce DIGital PIN1 FUNCtion SOURce DIGital PIN2 FUNCtion DIO DINPut TOUTput TINP
157. olarity Pin 2 Function Specifies the pin function DiglO Trigln TrigOut or DigIn Polarity Specifies the pin polarity Pin 3 Function Specifies the pin function DiglO Trigin TrigOut DigIn or Inhibitin Polarity Specifies the pin polarity Data Sends reads data from the digital I O port function Preferences Display Configures Screen saver Wake on I O and Display contrast Keys Enables disables key clicks and configures the On Off key Security ResetNVRam Resets all non volatile RAM settings to their factory defaults Error Displays the Error log Calibrate State Enables disables calibration You must supply a password to enable Sequence VProg High Enters measured data for high calibration point Low Enters measured data for low calibration point VMeas Enters measured data CMRR Calibrates common mode rejection ratio IProg High Enters measured data for high calibration point Low Enters measured data for low calibration point IMeas Enters Measured data DPRog Calibrates the downprogrammer IPeak Calibrates peak Date Saves the calibration date for each channel Save Saves the calibration data Password Changes the password About Frame Displays model serial number firmware revision backup revision and active firmware Module Displays model serial number options voltage current and power Series N6700 User s Guide 33 Configuring the Interface Configuring the Interface Once you have your power system up and r
158. omain name for your instrument in this field The Domain name is translated into an IP address Use the navigation keys to enter an alpha character Use the up down navigation or arrow keys to select a letter from the alphabetic choices as you scroll through the selections Use the number keys to enter a number g To configure the TCP settings select the following menu commands System Interface LAN TCP The following parameters can be configured 36 Series N6700 User s Guide USB Interface Series N6700 User s Guide Configuring the Interface Enable TCP Keeps a LAN socket active for the specified number keepalive of seconds This is useful to determine if a client is still reachable If there has been no activity on the connection after the specified time the instrument will send keepalive probes to the client to determine if it is still alive After the specified time out the connection will be marked as down or dropped The instrument releases resources that were allocated to the client TCP keepalive Enter the number of seconds to keep a LAN socket timeout active h To enable or disable the LAN as well as the built in Web server on your instrument select the following menu commands System Interface LAN Enable Enable LAN This is enabled when shipped To disable the LAN simply uncheck this box Enable Web This is enabled when shipped It lets you control the Server instrument directly from the internet browser on yo
159. ommands are also used to control system functions SYSTem CHANnel COUNt SYSTem CHANnel MODel1 This query returns the number of output channels installed in a mainframe lt chanlist gt This query returns the model numbers of the selected output channels Model numbers are comma delimited SYSTem CHANnel OPTion lt chanlist gt This query returns a list of options installed in each channel given in the channel list The list of options for each channel is surrounded by double quotes If there are no options installed in a channel an empty pair of double quotes is returned SYSTem CHANnel SERial lt chanlist gt This query returns the serial numbers of the selected output channels Serial numbers are comma delimited SYSTem COMMunicate RLSTate LOCal REMote RWLock lt chanlist gt SYSTem COMMunicate RLSTate lt chanlist gt 94 LOCal REMote RWLock This command configures the remote local state of the instrument according to the following settings The instrument is set to front panel and remote interface control The instrument is set to front panel and remote interface control The front panel keys are disabled The instrument can only be controlled via the remote interface The remote local state can also be set by interface commands over the GPIB and some other IO interfaces When multiple remote programming interfaces are active the interface with the most recently changed remote l
160. ong form or in 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 When the long form notation is used in this document the capital letters indicate the equivalent short form For example MEASure is the long form and MEAS indicates the short form equivalent Query Indicator Series N6700 User s Guide Following a header with a question mark turns it into a query VOLTage VOLTage TRIGgered The is the query indicator If a query contains a parameter place the query indicator at the end of the last header before the parameter VOLTage TRIGgered MAX 1 63 SCPI Conventions and Data Formats Message Unit Separator Root Specifier When two or more message units are combined into a compound message separate the units with a semicolon STATus OPERation 1 QUEStionable 1 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 The following messages terminators are permitted newline lt NL gt which is ASCII decimal 10 or hex OA end or identify lt END gt EOI with ATN false both of the above lt NL gt lt END gt also lt CR gt lt
161. or any errors WriteString Syst err ErrString ReadString give message if there is an error If Val ErrString Then MsgBox Error in instrument amp vbCrLf amp ErrString End If With Series N6700 User s Guide 101 List Programming Example List Programming Example This program executes a 10 point current and voltage list It also specifies 10 different dwell times When done the program checks for instrument error and gives a message if there is an error For ease in reading error checking is not included Sub main List 102 Dim IDN As String Dim GPIBaddress As String Dim ErrString As String Dim channel As String These next three strings are the points in the list All three strings are the same length The first one controls voltage the second current and the third dwell time Const voltPoints 1 2 3 4 5 6 7 8 9 10 Const currPoints 0 5 1 1 5 2 2 5 3 3 5 4 4 5 5 Const dwellPoints 1 2 0 5 1 0 25 1 5 0 1 1 0 75 1 2 These variable are neccessary to initialize the VISA COM Dim ioMgr As AgilentRMLib SRMC1ls Dim Instrument As VisaComLib Formatted1I0488 Dim ioAddress As String The following command line provides the program with the VISA name of the interface that it will be communication with It is currently set to use GPIB to communicate GPIBaddress GPIB1 5 INSTR Use the following line for LAN communication TCPIPaddress TCPIPO 141 25 36 214 use the following l
162. or was found in the command string Program mnemonic too long The header contains more than 12 characters Undefined header A command was received that was not valid for this instrument Header suffix out of range The value of the numeric suffix is not valid Numeric data error Generic numeric data error Invalid character in number An invalid character for the data type was found in the command string Exponent too large The magnitude of the exponent was larger than 32000 Too many digits The mantissa of a numeric parameter contained more than 255 digits excluding leading zeros Numeric data not allowed A numeric parameter was received but a character string was expected Suffix error Generic suffix error Invalid suffix A suffix was incorrectly specified for a numeric parameter Suffix too long The suffix contains more than 12 characters Suffix not allowed A suffix is not supported for this command Character data error Generic character data error Invalid character data Either the character data element contains an invalid character or the element is not valid Character data too long The character data element contains more than 12 characters Character data not allowed A discrete parameter was received but a string or numeric parameter was expected String data error Generic string data error Invalid string data An invalid character string was received Check that the string is enclosed in quotation
163. ort connector 144 conventions used in this guide 64 coupled commands 62 CP 90 CP 90 current measurement range 46 75 monitoring resistor 119 167 Index output range 81 programming accuracy 123 readback accuracy 123 returning current data 56 current limit setting 29 40 CV 89 load effect 120 noise 121 source effect 121 CV operating mode outputs in parallel 23 outputs in series 25 damage 15 DDE 92 description front panel display 11 overview 8 device clear 66 digital 1 0 configuring 149 connections 146 digital input configuring 149 connections 147 digitizer programming 54 programming example 104 dimensions 15 115 disassembly 153 tools required 153 electronic load 119 electrostatic discharge precautions 153 environment conditions 15 ERR 93 error messages 156 ESB 93 EXE 92 external trigger configuring 148 connections 145 168 fault output configuring 148 connections 145 fetch commands 45 74 FETC ARR CURR 74 FETC ARR VOLT 74 FETC CURR 75 FETC VOLT 75 front panel display 11 menus 32 screen saver 47 front panel menu exiting 31 using 30 GPIB interface 34 ground earth 15 guide user s 4 Hanning 55 header 63 long form 63 short form 63 inhibit input clearing 145 configuring 148 connections 145 initiate commands INIT NAME 97 inspection 15 installation 15 installing modules 153 instrument identification
164. output remains at the step If a trigger is received before the dwell time completes the trigger is ignored To ensure that no triggers are lost in a trigger paced list set the dwell time to zero Step 5 Specify if you want the list to generate trigger signals that can be used to trigger actions on other output channels or on external equipment connected to the digital port Front Panel Select Transient List Config Select the List Step number To generate a trigger enter a 1 in the Tout Begin Step or Tout End Step field If a zero is entered no trigger is generated for the step Repeat this for each step Use the t keys to select the next step Xi SCPI Command To program a trigger at the beginning of step 4 for output 1 use LIST TOUT BOST 0 0 0 0 1 0 1 To program a trigger at the end of step 0 2 and 4 for output 1 use LIST TOUT EOST 1 0 1 0 1 0 1 0 1 2 3 4 5 Trigger at BOST a P H 0 1 2 3 4 5 Trigger at EOST Step 6 Specify how you want the list to terminate Front Panel Select Transient List Terminate Select Stop Last Step Press Select SCPI Command To program the output 1 list to remain at the last list step when finished use LIST TERM 1 1 Step 7 If applicable specify how many times you want the list to repeat Sending the INFinity parameter in the SCPI command makes the list repeat indefinitely At
165. ow More cycles in the acquisition window results in better ripple rejection You can vary the measurement data sampling rate using the following commands Front Panel SCPI Command Select Measure Sweep Points For example to set the time interval Enter a value and press Select to 60us with 4096 samples use Then scroll to Time Interval entera SENS SWE TINT 60E 6 1 value and press Select again SENS SHEP POIN 4096 1 The time interval is rounded to the nearest 20 48us interval which is 61 44us Acquire Pre trigger Data The measurement system lets you capture data before after or at the trigger signal As shown in the following figure you can move the block of data being read into the acquisition buffer with reference to the trigger This allows pre or post trigger data sampling Series N6700 User s Guide Programming High Speed Test Extensions 4096 DATA POINTS OFFSET 4095 TIME 4096 DATA POINTS OFFSET 2048 4096 DATA POINTS OFFSET 0 9 OFFSET 0 to 2 oO 4096 DATA POINTS TRIGGER To offset the beginning of the acquisition buffer relative to the acquisition trigger use Front Panel SCPI Command Select Measure Sweep Offset To offset the measurement on Enter an offset value and press channel 1 by 100 points use Select SENS SWE OFFS POIN 100 1 With a negative offset values at the beginning of the buffer represent samples taken prior to
166. ower System 39 Programming the Output 40 Synchronizing Output Steps 42 Making Measurements 45 System Related Operations46 Programming High Speed Test Extensions 49 5 Introduction to Programming 59 SCPI Commands60 SCPI Messages 62 SCPI Conventions and Data Formats 64 SCPI Command Completion 66 Device Clear66 Series N6700 User s Guide 6 Language Dictionary 67 SCPI Command Summary 68 Calibration Subsystem 72 Measurement Subsystem 74 Output Subsystem 77 Source Subsystem 80 Status Subsystem 87 System Commands 94 Trigger Subsystem 97 7 Programming Examples 99 Output Programming Example 100 List Programming Example 102 Digitizer Programming Example104 A Specifications 107 Performance Specifications 108 Supplemental Characteristics 110 Auto Ranging Characteristic 115 Outline Diagram 115 B Verification and Calibration 117 Verification 118 Calibration 133 C Using the Digital Port 143 Digital Control Port 144 Configuring the Digital Control Port 148 D Service 151 Types of Service Available 152 Operating Checklist 152 Repackaging for Shipment 152 Disassembly 153 Error Messages 156 E Compatibility 161 Differences In General 162 Compatibility Command Summary 163 Index 167 Series N6700 User s Guide 1 Quick Reference The Agilent N6700 Modular Power System At a Glance 8 The Front Panel Ata Glance 10 The Rear Panel Ata Glance 10 Front Panel Display Ata Glance 11 Front Panel Keys At a
167. pending operations have completed Since your program can read this status bit on an interrupt basis OPC allows subsequent commands to be executed 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 state Device Clear 66 You can send a Device Clear at any time to abort a SCPI command that may be hanging up the GPIB interface Device Clear clears the input and output buffers of the power system and prepares the power system to accept a new command string The status registers error queue and all configuration states are left unchanged by Device Clear The following statement shows how to send a device clear over the GPIB interface using Agilent BASIC CLEAR 705 IEEE 488 Device Clear Series N6700 User s Guide Series N6700 User s Guide 6 Language Dictionary SCPI Command Summary 68 Calibration Subsystem 72 Measurement Subsystem 74 Output Subsystem 77 Source Subsystem80 Status Subsystem 87 System Commands 94 Trigger Subsystem97 This section gives the syntax and parameters for all the IEEE 488 2 SCPI commands and the Common commands used by the power system It is assumed that you are familiar with the material in chapter 5 which explains the terms symbols and syntactical structures used here and gives an introduction to programming You should also be familiar with chapter
168. perform the requested operation Lists not same length One or more lists are not the same length Data corrupt or stale Possible invalid data A new reading was started but not completed Data questionable The measurement accuracy is suspect Invalid format The data format or structure is inappropriate Invalid version The version of the data format is incorrect to the instrument Hardware error The command could not be executed because of a hardware problem with the instrument Hardware missing The command could not be executed because of missing hardware such as an option Expression error An expression program data element related error occurred Math error in expression An expression program data element could not be executed due to a math error Series N6700 User s Guide 159 Error Messages Query Errors these errors set Standard Event Status register bit 2 400 Query Error Generic error query 410 Query INTERRUPTED A condition causing an interrupted query error occurred 420 Query UNTERMINATED A condition causing an unterminated query error occurred 430 Query DEADLOCKED A condition causing a deadlocked query error occurred 440 Query UNTERMINATED after indefinite response A query was received in the same program message after a query indicating an indefinite response was executed Selftest Errors these errors set Standard Event Status register bit 3 202 Selftest Fail Aux Adc
169. pin will disable all output channels SOURce DIGital PIN1 POLarity POSitive NEGative SOURce DIGital PIN1 POLarity SOURce DIGital PIN2 POLarity POSitive NEGative SOURce DIGital PIN2 POLarity SOURce DIGital PIN3 POLarity POSitive NEGative SOURce DIGital PIN3 POLarity These commands set the polarity of the three digital port pins The pin polarities are saved in non volatile memory Setting a polarity to POSitive means that a logical true signal is a voltage high at the pin Setting the polarity NEGative means that a logical true signal is a voltage low at the pin For trigger inputs and outputs POSitive means a rising edge NEGative means a falling edge 82 Series N6700 User s Guide Source Subsystem SOURce LIST COUNt lt count gt MIN MAX INFinity lt chanlist gt SOURce LIST COUNt lt chanlist gt This command sets the number of times that the list is executed before it is completed Applies only to models with list capability The range is 1 through 256 Use INFinity to execute a list indefinitely In this case use ABORt TRANsient to stop the list The RST value 1 SOURce LIST CURRent LEVel lt curr gt lt curr gt lt chanlist gt SOURce LIST CURRent LEVel lt chanlist gt This command specifies the current setting for each list step in amperes Applies only to models with list capability A comma delimited list of up to 512 steps may be programmed The order in whic
170. ple selects the 5 volt programming range of channel 1 The value to program a range must be the maximum voltage of the range Front Panel SCPI Command Select CAL VOLT 5 1 System Cal Sequences Vprog Then select the Low range Step 8 Select the first voltage calibration point Front Panel SCPI Command Select Next The information field CAL LEV P1 OPC should indicate Enter P1 data Step 9 Measure the output voltage with the DVM and enter the data Front Panel SCPI Command Select the Measured Data field Enter CAL DATA lt data gt the data from the external DVM Press Select when done Step 10 Select the second voltage calibration point Front Panel SCPI Command Select Next The information field CAL LEV P2 should indicate Enter P2 data OPC Step 11 Measure the output voltage with the DVM and enter the data Front Panel SCPI Command Select the Measured Data field Enter CAL DATA lt data gt the data from the external DVM Press Select when done Press Next to finish calibration 135 Calibration 136 Low Range Voltage Measurement Calibration This only applies to Agilent Models N6761A and N6762A Step 12 Select the low voltage measurement range This example selects the 5 volt measurement range of channel 1 The value to program a range must be the maximum voltage of the range Front Panel SCPI Command Select CAL VOLT MEAS 5 1 System Cal Sequences Vmeas Step 13 Sel
171. pment list Step 18 Select peak current limit calibration Front Panel SCPI Command Select CAL CURR PEAK 1 System Cal Sequences Peak Step 19 Select the first current calibration point Front Panel SCPI Command Select Next The calibration is CAL LEV P1 automatic OPC Step 20 Replace the 25 ohm resistor with the 4 ohm load resistor see equipment list Step 21 Select the second current calibration point Front Panel SCPI Command Select Next The calibration is CAL LEV P2 automatic OPC Steps 22 through 24 only apply to Agilent Models N6731A through N6735A and N6742A through N6745A Step 22 Connect the 4 ohm load resistor across the output terminals see the equipment list Step 23 Select peak current limit calibration Front Panel SCPI Command Select CAL CURR PEAK 1 System Cal Sequences IPeak Step 24 Select the first current calibration point Front Panel SCPI Command Select Next The calibration is CAL LEV P1 automatic OPC 140 Series N6700 User s Guide CAUTION Save and Exit Calibration Mode Calibration Storing calibration constants overwrites the existing ones in non volatile memory If you are not sure you want to permanently store the new constants do not Save the data when you exit the calibration mode The calibration will then remain unchanged Series N6700 User s Guide Front Panel Select System Cal Date Enter the calibration date in the
172. pple and Noise peak to peak Both N A 15 mV rms Both N A 5 mV Transient Response Voltage at 200 us Both 200 mV 200 mV Constant Current Tests Current Programming amp Readback Minimum Current lout Both 10 mA 30 mA Front Panel Display Readback Both lout 4 mA lout 4 mA High Current lout N6734A 1 47775 A 1 52225 A N6744A 2 9755 A 3 0245 A Front Panel Display Readback N6734A lout 6 25 mA lout 6 25 mA N6744A lout 8 5 mA lout 8 5 mA CC Load Effect Both 2 mA 2 mA CC Source Effect Both 1mA 1 mA Instrument Settings Test Description N6734A N6744A Voltage Programming amp Readback Zero Voltage 20 mV 1A 20 mV 3A Voltage Programming amp Readback High Voltage 35V 1A 35V 3A CV Load Effect Source Effect Ripple and Noise 35V 1A 35V 3A Transient Response 35 V from 0 75 A to 1 5A 35V from 1 5 A to 3 A Current Programming amp Readback Zero Current 10 mA 35 V 10 mA 35 V Current Programming amp Readback High Current 1 5 A 35 V 3A 35V CC Load Effect Source Effect 1 5 A 35 V 3A 35V Series N6700 User s Guide 131 Verification 132 Test Record Form Agilent N6735A and N6745A Agilent N6735A and N6745A Report No Date Description Model Minimum Specs Results Maximum Specs Constant Voltage Tests Voltage Programming amp Readback Minimum Voltage Vout Both 40 mV 80 mV Front Panel Display Readback Both Vout 60 mV Vout 60 mV High Voltage Vout Both 49 89 V 50 11 V Front Panel
173. program the instrument settings as described in the test record form under CV Load Effect Set the electronic load for the output channel s current as described in the test record form under CV Load Effect The CV annunciator on the front panel must be on If it isn t adjust the load so that the output current drops slightly Record the output voltage reading from the DVM Series N6700 User s Guide Series N6700 User s Guide Verification 5 Open the load Record the voltage reading from the DVM again The difference between the DVM readings in steps 4 and 5 is the load effect which should not exceed the value listed in the test record form for the appropriate model under CV Load Effect CV Source Effect Test category 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 1 Turn off the power system and connect the ac power line through a variable voltage transformer or an AC source 2 Connect a DVM and an electronic load as shown in Test Setup figure A Set the variable voltage transformer or AC source to nominal line voltage 3 Turn on the power system and program the instrument settings as described in the test record form under CV Source Effect 4 Set the electronic load for the output channel s current as described in the test record form under CV Source Effect
174. put voltage reaches the programmed over voltage limit Press the Menu key to access the front panel command menu The first line identifies the output channel that is being controlled followed by the menu path Since the top level is displayed the path is empty The second line indicates the commands that are available at the present menu level In this case the top level menu commands are shown with the Output command highlighted The third line indicates which commands are available under the Output command The output command must be selected to access the next level Chan 1 5 Measure Transient Protect States System Voltage Current Delay Press the right arrow gt navigation key to traverse the menu until the Protect command is highlighted Press the Sel key to select the Protect command Output Measure Transient BELG OWP OCP Inhibit Coupling Clear States System The menu path now shows that the commands shown on the second line are located under the Protect command The OVP command is highlighted The third line indicates which functions are located under the OVP command Press the Sel key to select the OVP command Chan 1 Protect ds OCP Inhibit Coupling Clear Overvoltage protection settings Series N6700 User s Guide Channel Using the Front Panel Menu The command menu is now at the function control level This is the lowest level in this path Two over voltage function controls are a
175. ransient Recovery Time Series N6700 User s Guide Specifications for outputs operating in series can be obtained from the specifications for single outputs Most specifications are expressed as a constant or a percentage or ppm plus a constant For series operation the percentage portion remains unchanged while constant portions or any constants are changed as indicated All series specifications referring to voltage are twice the single output specification except for programming resolution which is the same as for a single output All series specifications referring to current are the same as for a single output except for CC load effect CC load cross regulation CC source effect and CC short term drift which are twice the current programming accuracy including the percentage portion Load transient specifications are typically twice the single output 25 Series N6700 User s Guide 3 Getting Started Turning the Unit On 28 Selecting an Output Channel 28 Entering an Output Voltage Setting 28 Entering a Current Limit Setting 29 Enabling the Output 29 Using the Front Panel Menu 30 Configuring the Interface34 This chapter describes how to get started using your power system It discusses turning the unit on using the front panel controls and navigating the front panel command menu A map of the front panel command structure is also included This chapter also contains information on how to configure the
176. real time unlatched summary of all Status Byte register bits that are enabled by the Service Request Enable register MSS is set whenever the power system 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 Status Byte register The RQS bit is a latched version of the MSS bit Whenever the power system requests service it sets the SRQ interrupt line true and latches RQS into bit 6 of the Status Byte register When the controller 87 Status Subsystem 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 MAV Bit and Output Queue The Output Queue is a first in first out FIFO data register that stores power system 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 QUESTIONABLE STATUS IDENTICAL REGISTERS FOR EACH CHANNEL CONDITION PTR NTR EVENT ENABLE Ov oc PF CP OT CP CHAN 1 QSUM INH UNR PROT STAT QUES COND STAT QUES ENAB lt n gt STAT QUES PTR NTR lt n gt STAT QUES ENAB STAT QUES PTR NTR STAT QUES EVEN ERROR QUEUE es A SERVICE S REQUEST STATUS BYTE ENABLE EVENT ENABLE
177. reset the list count is set to 1 Front Panel Select the Transient List Count Enter a value in the Count field and press Select SCPI Command To program the output 1 list to repeat 2 times use LIST COUN 2 1 Step 8 Select a trigger source initiate and trigger the list This is described in detail under Synchronizing Output Steps Series N6700 User s Guide 53 Programming High Speed Test Extensions 54 The Digitizer Function The digitizer function lets you access the enhanced voltage and current measurement capabilities of the power system These include Adjusting the measurement sample rate to a maximum of 50 kHz Adjusting measurement triggers to capture pre trigger transients Selecting a measurement window that can attenuate ac noise Retrieving arrays that contain the digitized output current or output voltage Synchronizing measurements with either a Bus Transient or external trigger Programming the Digitizer Adjust the Measurement Sample Rate The following figure illustrates the relationship between measurement samples or points and the time interval between samples in a typical measurement TRIGGER m MEASUREMENT OCCURS SAMPLE i em lt TIME INTERVAL BETWEEN SAMPLES lt ACQUISITION TIME TIME INTERVAL X SAMPLES Ripple rejection is a function of the number of cycles of the ripple frequency contained in the acquisition wind
178. ress the Help key to obtain additional help about any function control menu level Press the Back key to exit the Help menu If the self test fails or if other operating problems occur with your instrument the Err annunciator comes on Press the Error key to display the list of errors Refer to Appendix D for further information 31 Using the Front Panel Menu Front Panel Menu Commands Menu Command Control Description Output Voltage Programs voltage setting and range Current Programs current setting and range Delay Program Turn on Turn Off delay Measure Range Selects voltage and current measurement range Sweep Specifies measurement points time interval and trigger offset Window Selects measurement window Rectangular Hanning Control Lets you abort a measurement in progress Transient Mode Voltage Selects voltage mode Fixed Step or List Current Selects current mode Fixed Step or List Step Programs voltage and current steps Enables step trigger signals List Pace Specifies Dwell or Trigger paced list Repeat Specifies number of list repetitions or specifies continuous list Terminate Specifies list settings when the list terminates Config Configures the list steps Specify voltage current and dwell values Also specifies trigger output signal states Reset Aborts the list and resets all list parameters TrigSource Specify the trig
179. rnate Manufacturing Site Manufacturer s Name Agilent Technologies Inc Agilent Technologies Malaysia Sdn Bhd Manufacturer s 550 Clark Drive Suite 101 Malaysia Manufacturing Address Budd Lake New Jersey 07828 Bayan Lepas Free Industrial Zone PH III USA 11900 Penang Malaysia Declares under sole responsibility that the product as originally delivered Product Name Modular Power System Model Numbers N6700 N6731A N6732A N6733A N6734A N6735A N6742A N6743A N6744A N6745A N6751A N6752A N6761A N6762A Product Options This declaration covers all options of the above product s complies with the essential requirements of the following applicable European Directives and carries the CE marking accordingly Low Voltage Directive 73 23 EEC amended by 93 68 EEC EMC Directive 89 336 EEC amended by 93 68 EEC and conforms with the following product standards EMC Standard IEC 61326 1997 A1 1998 A2 2000 Limit EN 61326 1997 A1 1998 A2 2001 CISPR 11 1997 EN 55011 1998 Group 1 Class A IEC EN 61000 4 2 1995 A1 1998 A2 2001 4 kV CD 8 kV AD IEC EN 61000 4 3 2002 3 V m 80 1000 MHz 80 AM IEC 61000 4 4 1995 A1 2000 EN 61000 4 4 1995 A1 2 0 5 kV signal lines 1 kV power lines IEC 61000 4 5 1995 A1 2000 EN 61000 4 5 1995 A1 2 0 5 kV differential 1 kV common mode IEC 61000 4 6 1996 A1 2000 EN 61000 4 6 1996 A1 2 3 Vrms 0 15 80 MHz 80 AM IEC 61000 4 11 1994 A1 2000 EN 61000 4 11 1994 A1 100 20 ms IE
180. ront Panel Display Readback Both lout 45 pA lout 45 pA CC Load Effect Both 30 pA 30 pA CC Source Effect Both 30 pA 30 pA Instrument Settings Test Description N6761A N6762A Voltage Programming amp Readback Min Voltage 15 mV 1 5A 15mV 3A Voltage Programming amp Readback High Voltage 50V 1A 50V 2A Voltage Programming amp Readback Low Voltage 5 5 V 1 5 A 5 5 V 3 A CV Load Effect Source Effect Ripple and Noise 50V 1A 50 V 2 A Transient Response 50 V from 0 5 A to 1 A 50 V from 1 A to 2 A Current Programming amp Readback Min Current 1 mA 50 V 1 mA 50 V Current Programming amp Readback High Current 1 5 A 33 V 3 A 33V Current Programming amp Readback Low Current 0 1 A 50 V 0 1 A 50 V CC Load Effect Source Effect Ripple and Noise 1 5 A 33 V 3 A 33 V Series N6700 User s Guide 127 Verification 128 Test Record Form Agilent N6731A Agilent N6731A Report No Date Description Model Minimum Specs Results Maximum Specs Constant Voltage Tests Voltage Programming amp Readback Minimum Voltage Vout 1mV 39 mV Front Panel Display Readback Vout 20 mV Vout 20 mV High Voltage Vout 4 976 V 5 024 V Front Panel Display Readback Vout 25 mV Vout 25 mV CV Load Effect 2 mV CORRERE ESEN 2 mV CV Source Effect 1mV 1 mV CV Ripple and Noise peak to peak N A 10 mV rms N A 2 mV Transient Response Voltage at 200 us 80 mV 80 mV Constant Current Tests
181. rotective 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 power system and review this guide for safety warnings and instructions Safety warnings for specific procedures are located at appropriate places throughout this Guide Do not operate the instrument in the presence of flammable gasses or fumes The environmental conditions of the instrument are documented in Appendix A Basically the instrument should only be operated indoors in a controlled environment The dimensions of your instrument as well as an outline diagram are given in Appendix A A fan cools the power system by drawing air through the sides and exhausting it out the back The instrument must be installed in a location that allows sufficient space at the sides and back of the unit for adequate air circulation Rack Installation CAUTION Do not block the air intake and exhaust at the sides of the unit or the exhaust at the rear of the unit Refer to the outline diagram in Appendix A You cannot use support rails for rack mounting your instrument as they would block the airflow needed for cooling Use the Rack Mount kit to rack mount your instrument The Rack Mount Kit is shipped with your instrument and is also available by ordering part number N6700 60009
182. s as well as NTR and PTR filters The Standard Event status group is also programmed using Common commands Common commands control additional status functions such as the Service Request Enable and the Status Byte registers 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 Questionable Status Group The Questionable Status registers record signals that indicate abnormal operation As shown below the group consists of the same register types as the Status Operation group The outputs of the Questionable Status group are logically ORed into the QUEStionable summary bit 8 of the Status Byte register Standard Event Status Group The Standard Event registers are programmed by Common commands The Standard Event event register latches events relating to communication status 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 Status Byte Register This register summarizes the information from all other status groups as defined in the IEEE 488 2 Standard Digital Interface for Programmable Instrumentation MSS and ROS Bits MSS is a
183. s that you can program the power system using the same commands that are used to program the Agilent 662xA power supplies The following table describes the model mapping In addition to the pre configured models listed below Agilent 662xA commands will also work in mainframes that contain any combination of N675xA or N675xA power modules Agilent 662xA commands will NOT work in mainframes that contain any Agilent of N673xA or N674xA power modules This is true even if the mainframes also contain Agilent N675xA or N676xA power modules Pre configured Agilent MPS Model Description Previous Agilent Model N6721A N6722A N6723A N6724A N6725A N6726A N6727A N6728A N6729A N6700A Mainframe with 2 N6752A autoranging modules 6621A N6700A Mainframe with 2 N6752A autoranging modules 6622A N6700A Mainframe with 2 N6751A and 1 N6752A 6623A autoranging module N6700A Mainframe with 4 N6751A autoranging modules 6624A N6700A Mainframe with 1 N6761A and 1 N6762A 6625A precision module N6700A Mainframe with 2 N6761A and 2 N6762A 6626A precision modules N6700A Mainframe with 4 N6751A autoranging modules 6627A N6700A Mainframe with 2 N6762A precision modules 6628A N6700A Mainframe with 4 N6762A precision modules 6629A Series N6700 User s Guide 161 Compatibility Commands Differences In General The following table documents the general differences between the way
184. sassemble instruments only in a static free work area Use a conductive work area to reduce static charges Use a conductive wrist strap to reduce static accumulation Minimize handling Keep replacement parts in original static free packaging Remove all plastic foam vinyl paper and other static generating materials from the immediate work area For the disassembly procedures in this manual the following tools are required T10 Torx driver to remove or install modules in the mainframe T25 Torx driver remove a mainframe from the equipment rack Removing Installing Modules WARNING SHOCK HAZARD FAN HAZARD Turn off the mainframe and disconnect its power cord before attempting any of the following procedures CAUTION Modules must be installed next to one another starting with slot 1 Do not leave any empty slots between modules otherwise the power system will not operate Any remaining unused slots must have a filler module installed to ensure proper cooling Do not install filler modules between power modules Series N6700 User s Guide Step 1 Step 2 Step 3 Remove the blower cover Remove three screws from the top of the cover and two screws on the sides Tilt the cover up and slide it out To remove a module first remove the two fastening screws at either end of the module Grasp the module at the ends near the fan and the output connector and lift it straight up out of the ma
185. should not exceed the value listed in the test record form for the appropriate model under CC Source Effect 125 Verification 126 Test Record Form Agilent N6751A and N6752A Agilent N6751A and N6752A Report No Date Description Model Minimum Specs Results Maximum Specs Constant Voltage Tests Voltage Programming amp Readback Minimum Voltage Vout Both 1mV 39 mV Front Panel Display Readback Both Vout 20 mV Vout 20 mV High Voltage Vout Both 49 951 V 50 049 V Front Panel Display Readback Both Vout 45 mV Vout 45 mV CV Load Effect Both 2 mV 2 mV CV Source Effect Both 1mV 1 mV CV Ripple and Noise peak to peak Both N A 6 mV rms Both N A 1 mV Transient Response Voltage at 100 us Both 75 mV 75 mV Constant Current Tests Current Programming amp Readback Minimum Current lout Both 10 mA 30 mA Front Panel Display Readback Both lout 4 mA lout 4 mA High Current lout N6751A 4 975 A 5 025 A N6752A 9 970 A 10 030 A Front Panel Display Readback N6751A lout 9 mA lout 9 mA N6752A lout 14 mA lout 14 mA CC Load Effect Both 2 mA 2 mA CC Source Effect Both 1mA 1 mA Instrument Settings Test Description N6751A N6752A Voltage Programming amp Readback Min Voltage 20 mV 5A 20 mV 10A Voltage Programming amp Readback High Voltage 50V 1A 50V 2A CV Load Effect Source Effect Ripple and Noise 50V 1A 50V 2A Transient Response 50 V from 0 5 A to 1 A 50 V from 1 A to 2 A C
186. strument s USB Alias name from the Edit Config dialog box on your PC You can also do this later using IO Config 6 You can also use IO Config to display the USB Devices dialog box From this box you can check instrument identification parameters 7 Use an application such as VISA Assistant to verify communications with instruments via the USB interface Remote Interface and Other Non volatile Factory Settings Remote interface settings are stored in non volatile memory The following table documents the the factory shipped non volatile settings The interface settings can be restored by selecting the Reset control located in the System Interface menu All non volatile settings can be restored by selecting the ResetNVRam control located in the System Preferences Security ResetNVRam menu Factory shipped non volatile interface settings can be resorted with either Reset or ResetNVRam control GPIB Address 5 Use DNS naming service Enabled DHCP Enabled Use NetBIOS naming service Enabled AutolP Enabled Domain Name Blank IP Address 127 0 0 1 TCP keepalive Enabled Subnet Mask 255 255 255 0 TCP keepalive seconds 1800 Default Gateway Blank Web server Enabled Obtain DNS server from DHCP Enabled LAN Enabled DNS server Blank USB Enabled Host name A N6700A xxxxx Other factory shipped non volatile settings can be restored with the ResetNVRam control Digital port function all pins Digital In Wake on 1 0 Enabled Digital port polarity a
187. t Series N6700 User s Guide Programming High Speed Test Extensions Step 5 To generate a pulse train you can simply repeat the pulse as needed For example to program a pulse train of 50 pulses use Front Panel SCPI Command Select Transient List Repeat To program output 1 use Enter the number of list repetitions LIST COUN 50 1 50 and Press Select Step 6 Specify if you want the output pulse to generate a trigger signal that can be used to trigger actions on other output channels or on any external equipment connected to the digital port For example to generate a trigger signal at the end of the pulse use Front Panel SCPI Command Select Transient List Config To program a trigger at the End of the Select List Step 0 and check the pulse for output 1 use Tout Step box Press Select LIST TOUT EOST 1 0 1 You must program a value of 0 no trigger for step 1 as a placeholder Step 7 Specify the output state after the pulse has completed For example to return the output to the state it was in before the pulse use Front Panel SCPI Command Select Transient List Terminate To program the output 1 use Select Return to Start Press Select LIST TERM 0 1 Step 8 Select the trigger source that will generate the pulse or pulse train For example to select Bus triggers as the trigger source use Front Panel SCPI Command Select Transient TrigSource To program output 1 use Select Bus and pr
188. t a wire size large enough to carry short circuit current without overheating To satisfy safety requirements load wires must be heavy enough not to overheat while carrying the short circuit output current of the unit refer to the following chart Along with conductor temperature you must also consider voltage drop when selecting wire sizes The following chart lists the resistivity for various wire sizes and also the maximum lengths to limit the voltage drop to 1 0 volts for various currents Wire size Current carrying capacity Amps Resistance Max Length to Limit Voltage to 1 V Lead for5A for 10 A for 20A AWG 2 wires bundled 4 wires bundled Q foot Wire length in feet 20 78 6 9 0 0102 20 10 5 18 14 5 12 8 0 0064 30 15 7 5 16 18 2 16 1 0 0040 50 25 12 5 14 29 3 25 9 0 0025 40 20 12 37 6 33 2 0 0016 30 Area in mm2 2 wires bundled 4 wires bundled Q meter Wire length in meters 0 5 7 8 6 9 0 0401 5 2 4 1 2 0 75 9 4 8 3 0 0267 7 4 3 8 1 8 1 12 7 11 2 0 0200 10 5 2 6 1 5 15 0 13 3 0 0137 14 6 7 2 3 6 2 5 23 5 20 8 0 0082 12 2 6 Notes 1 Capacity for AWG wires derived from MIL W 5088B Max ambient temp 55 C Max wire temp 105 C 2 Capacity for metric wires are derived from IE Publication 335 1 3 Capacity of aluminum wire is approximately 84 of that listed for copper wire 4 Because of wire inductance considerations it is recommended that you keep your load leads twisted tie wrapped or bundled toge
189. t manually return the trigger system to the idle state The following commands return the trigger system to the idle state Front Panel SCPI Command Select the Transient Control ABOR Scroll to and select Abort Series N6700 User s Guide Making Measurements Generating Trigger Out Signals Making Measurements Each output channel can generate trigger signals that can be used by other output channels or routed to a pin on the digital port that has been configured as a trigger output TOUT Use the following commands to program transient trigger signals that are generated when an output Step occurs SCPI Command To program channel 3 s step function to generate a trigger signal use STEP TOUT ON 3 Front Panel Use the Channel key to select the channel that is the trigger source Select Transient Step Check Enable Trigger Output Then press Select Each output channel has its own measurement capability The output voltage and current is measured by acquiring a number of samples at the selected time interval applying a window function to the samples and averaging the samples The power on and RST time interval and number of samples settings yield a measurement time of 21 milliseconds per reading 1024 data points at 20 48 us intervals The windowing function is Rectangular Use the following commands to make a measurement SCPI Command To measure the average output voltage or current use MEAS VO
190. t the output of the differential amplifier to the oscilloscope with a 50 Q termination at the input of the oscilloscope 121 Verification 122 Set the differential amplifier to multiply by ten divide by one and 1 Megohm input resistance The positive and negative inputs of the differential amplifier should be set to AC coupling Set the oscilloscope s time base to 5 ms div and the vertical scale to 10 mV div Turn the bandwidth limit on usually 20 or 30 MHz and set the sampling mode to peak detect Program the power supply to the settings indicated in the in the test record form for the appropriate model under CV Ripple and Noise and enable the output Let the oscilloscope run for a few seconds to generate enough measurement points On the Agilent Infiniium scope the maximum peak to peak voltage measurement is indicated at the bottom of the screen on the right side Divide this value by 10 to get the CV peak to peak noise measurement The result should not exceed the peak to peak limits in the test record form for the appropriate model under CV Ripple and Noise peak to peak df the measurement contains any question marks clear the measurement and try again This means that some of the data received by the scope was questionable Disconnect the oscilloscope and connect an rms voltmeter in its place Do not disconnect the 50 ohm termination Divide the reading of the rms voltmeter by 10 The result should not excee
191. the Compatibility programming commands work on the Agilent N6700 MPS and the way they work on the Agilent 662xA series DC power supplies Item Differences Queries The Agilent N672xA models will respond to multiple queries It will not allow a space separator between numbers It will not allow a user to query information read back only a portion of the information send another command and finish reading back the information from the original query Sending a second query without reading the response to the first will generate an error Model number queries will only return the N6700A model number Status functions Serial Poll will be controlled by the SCPI status model and will not act like a 662xA serial poll SRQ will be controlled by the SCPI status model Parallel poll will not work The Agilent N67xxA modules will never set the CC bit All other status bits are translated to the closest 662xA bits Settings The full scale limits will match the Agilent N67xxA module limits There is no automatic setting adjustment Measurement Measurements use the present settings for points time interval etc Floating point numbers returned by the instrument may not have exactly the same syntax or number of digits Calibration Calibration must be done in SCPI Storage states The Agilent N67xxA modules have 2 non volatile states and 9 volatile states The 9 volatile states are only available when using compatibility comm
192. the straps between sense and load terminals Make your connections as shown in the previous figure Connect the sense leads as close to the load as possible Refer to the Wire Size section for information about selecting the proper wire size Best results are obtained by using the shortest load leads practical It is recommended that you keep your load leads under 14 7 meters 50 feet per lead because of inductance effects The sense leads carry only a few milliamperes of current and therefore can be lighter gauge than the load leads However note that any voltage drop in the sense leads can degrade the voltage regulation of the instrument Try to keep the sense lead resistance less than about 0 5Q per lead this requires 20 AWG or heavier for a 50 foot length Open Sense Leads The sense leads are part of the output s feedback path Connect them in such a way so that they do not inadvertently become open circuited The power system includes protection resistors that reduce the effect of open sense leads during remote sensing operation If the sense leads open during operation the power system returns to the local sensing mode with the voltage at the output terminals approximately 1 higher than the programmed value Output Noise Considerations 22 Any noise picked up on the sense leads will appear at the output terminals and may adversely affect CV load regulation Twist the sense leads or use a ribbon cable to minimize the pick
193. the trigger When the value is 0 all values are taken after the trigger Values greater than 0 can be used to program a delay time from the receipt of the trigger until the values entered into the buffer are valid Delay time offset x sample period 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 Series N6700 User s Guide Specify a Window Function Windowing is a signal conditioning process that reduces the error in average measurements made in the presence of periodic signals and noise Two window functions are available Rectangular and Hanning At power on the measurement window is Rectangular The Rectangular window calculates average measurements without any signal conditioning However in the presence of periodic signals such ac line ripple a Rectangular window can introduce errors when calculating average measurements This can occur when a non integral number of cycles of data has been acquired due to the last partial cycle of acquired data One way of dealing with AC line ripple is to use a Hanning window The Hanning window applies a cos weighting function to the data when calculating average measurements This attenuates the AC noise in the measurement window The best attenuation is achieved when at least three or
194. ther and less than 50 feet 14 7 meters in length per lead Note that the minimum wire size required to prevent overheating as shown in the above chart may not be large enough to prevent OV trip and to maintain good regulation Under most conditions the load wires should be heavy enough to limit the voltage drop to no more than 1 0 V per lead To help prevent nuisance tripping of the over voltage circuit select a wire size sufficient to handle the FULL output current of the unit no matter what the intended load current or current limit setting Series N6700 User s Guide Load lead resistance is an important factor relating to the CV stability of the instrument when remote sensing capacitive loads If high capacitance loads are expected you should not use wire gauges heavier than 12 to 14 AWG for long runs of load lead 19 Connecting the Outputs 20 Multiple Loads If you are using the as shipped terminal block strapping pattern local sensing and are connecting multiple loads to one output connect each load to the output terminals using separate connecting wires see the figure below This minimizes mutual coupling effects and takes full advantage of the power system s low output impedance Each pair of wires should be as short as possible and twisted or bundled to reduce lead inductance and noise pickup If load considerations require the use of distribution terminals that are located away from the instrument connect the o
195. tion Inhibit To latch the Inhibit signal Select either Latching or Live OUTP INH MODE LAIC To disable Inhibit select Off To set the Inhibit signal live OUTP INH MODE LIVE To disable the Inhibit signal OUTP INH MODE OFF Each of the three pins can be configured as general purpose digital inputs and outputs The polarity of the pins can also be configured Front Panel SCPI Command Select System DigPort then either To configure the pin function Pin 1 Pin2 or Pin 3 DIG PIN lt gt FUNC DIO Select Function and configure the To configure pin polarity pin as DiglO DIG PIN lt gt POL lt pol gt To send data to the pins Go back one level select Polarity DIG OUTP DATA lt data gt then either Positive or Negative To send digital data to the pins select System DigPort Data Select DataOut and enter the data Each of the three pins can be configured as digital input only The polarity of the pins can also be configured Front Panel SCPI Command Select System DigPort then either To configure the pin function Pin 1 Pin2 or Pin 3 DIG PIN lt gt FUNC DINP Select Function and configure the To configure pin polarity pin as DigIn DIG PIN lt gt POL lt pol gt To read the pin data Go back one level select Polarity DIG INP DATA then either Positive or Negative To read the data from the pins select System DigPort Data Select Dataln and read the data 149 Ser
196. to Agilent Technologies Warranty Service For warranty service this product must be returned to a service facility designated by Agilent Technologies Customer shall pay shipping expenses to return the product to Agilent Agilent shall pay for return of the product to the Customer 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 Remedies THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER S SOLE AND EXCLUSIVE REMEDIES AGILENT TECHNOLOGIES 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 previous 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 Technologies Licens
197. tor lt NL gt then the output queue and the MAV bit are also cleared Series N6700 User s Guide 91 Status Subsystem ESE ESE ESR OPC OPC 92 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 Status Enable register The bit configuration of the Standard Event register is as follows Bit Position 7 6 Bit Value 128 Bit Name PON PON Power on has occurred CME Command error EXE Execution error 32 CME 4 3 2 1 0 16 8 4 1 EXE DDE QUE OPC DDE Device dependent error QUE Query error OPC Operation complete 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 The command is mainly used for program synchronization It causes the instrument to set the OPC bit bit 0 of the Standard Event Status register when the instrument has completed all pending operations sent before the OPC command Pending operations are complete
198. ueries return an array containing the digitized output current in amperes or output voltage in volts The data returned by the FETCh command is the result of the last measurement command or acquisition trigger The data is valid until the next MEASure or INITiate command occurs The output voltage or current is digitized whenever a measurement command is sent or an acquisition trigger occurs The sampling rate 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 74 Series N6700 User s Guide Measurement Subsystem FETCh SCALar CURRent DC FETCh SCALar VOLTage DC lt chanlist gt lt chanlist gt MEASure SCALar CURRent DC lt chanlist gt MEASure SCALar VOLTage DC lt chanlist gt These queries return the DC output current in amperes or output voltage in volts The data returned by the FETCh command is the result of the last acquisition The data is valid until the next MEASure or INITiate command occurs The output voltage or current is digitized whenever a measurement command is sent or an acquisition 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 SENSe CURRe
199. ues see Supplemental Characteristics 2 With an output change from no load to full load up to a maximum load lead drop of 1 V per lead 3 Applies from minimum to maximum programming range see Supplemental Characteristics 108 Series N6700 User s Guide Performance Specifications Agilent Models N6731A N6735A and N6742A N6745A N6731A N6732A N6742A N6733A N6743A N6734A N6744A N6735A N6745A DC Output Ratings Voltage 5V 8V 20 V 35 V 50 V Current 10 A 6 25A 10A 25A 5A 15A 3A 08A 16A Power 50 W 50 W 80 W 50 W 100 W 52 5 W 105 W 40 W 80 W Output Ripple and Noise PARD from 20 Hz 20 MHz CV peak to peak 10 mV 12 mV 14 mV 15 mV 20 mV CV rms 2 mV 2 mV 3 mV 5 mV 9 mV Load Effect Regulation 07E 1 Voltage 2 mV 2 mV 2 mV 4 mV 6 mV Current 2mA 2mA 2mA 2mA 2mA Source Effect Regulation Voltage 1 mV 2 mV 2 mV 4 mV 6 mV Current 1 mA 1 mA 1 mA 1 mA 1 mA Programming Accuracy NOTE 2 at 23 C 5 C after a 30 minute warm up Voltage 0 1 19 mV 0 1 19 mV 0 1 20 mV 0 1 35 mV 0 1 60 mV Current 0 15 20 mA 0 15 20 mA 0 15 20 mA 0 15 20 mA 0 15 20 mA Measurement Accuracy at 23 C 5 C Voltage 0 1 20 mV 0 1 20 mV 0 1 20 mV 0 1 35 mV 0 1 60 mV Current 0 15 20 mA 0 15 10 mA 0 15 5 mA 0 15 4 mA 0 15 4 mA Load Transient Recovery Time time to recover to within the settling band following a load change from 50 to 100 and from 100 to 50 of ful
200. umber of end of step list points Note 2 Sets the voltage list Note 2 Returns the number of voltage level points Note 2 Generate a trigger output on the voltage or current step transient Series N6700 User s Guide SCPI Command Summary SCPI Command SOURce continued VOLTage LEVel IMMediate AMPLitude lt NRf gt chanlist TRIGgered AMPLitude lt NRf gt chanlist MODE FlXed STEP LIST chanlist PROTection LEVel lt NRf gt chanlist STATe lt Bool gt chanlist RANGe lt NRf gt chanlist STATus OPERation EVENt chanlist CONDition chanlist ENABle lt NRf gt chanlist NTRansition lt NRf gt chanlist PTRansition lt NRf gt chanlist PRESet QUEStionable EVENt chanlist CONDition chanlist ENABle lt NRf gt chanlist NTRansition lt NRf gt chanlist PTRansition lt NRf gt chanlist SYSTem CHANnel COUNt MODel chanlist OPTion chanlist SERial chanlist COMMunicate RLSTate LOCal REMote RWLock ERRor VERSion TRIGger AC Quire IMMediate chanlist SOURce BUS PIN lt pin gt TRAN lt chan gt chanlist TRANsient MMediate chanlist SOURce BUS PIN lt pin gt TRAN lt chan gt chanlist Note 1 Only applies to Models N6751A N6752A N6761A and N6762A Description Sets the output voltage Sets the triggered output voltage Sets the voltage trigger
201. unning you can configure the remote interface The Agilent N6700 MPS supports GPIB LAN and USB interfaces All three interfaces are live at power on For detailed information about interface communication refer to the Agilent Technologies USB LAN GPIB Interfaces Connectivity Guide which you can download from the Agilent web site at http www agilent com find connectivity CAUTION Electrostatic discharges greater than 1 kV near the interface connectors may cause the unit to reset and require operator intervention GPIB Interface The following steps will help you quickly get started connecting your instrument to the General Purpose Interface Bus GPIB 1 Ifyou do not have the Agilent I O Library software installed on your PC you can download the I O library software from the Agilent web site at http www agilent com find connectivity 2 Ifyou do not have a GPIB card installed in your PC turn off your computer and install the GPIB interface card 3 Connect your instrument to the GPIB card using a GPIB interface cable Observe the following precautions 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 Do not stack more than three connector blocks together on any GPIB connector Make sure all connectors are fully seated and the lock scre
202. up of external noise In extremely noisy environments it may be necessary to shield the sense leads Ground the shield at the power system end only do not use the shield as one of the sensing conductors The noise specifications in Appendix A apply at the output terminals when using local sensing However voltage transients may be produced at the load by noise induced in the leads or by load current transients acting on the inductance and resistance of the load lead If it is desirable to keep voltage transient levels to a minimum place an aluminum or a tantalum capacitor with an approximate value of 10 uF per foot 30 5cm of load lead right across the load Series N6700 User s Guide Parallel Connections Parallel Connections CAUTION Only outputs that have equivalent voltage and current ratings can be connected in parallel Connecting outputs in parallel provides a greater current capability than can be obtained from a single output Only parallel outputs that have equivalent voltage and current capability As an example the figure on the left shows how to connect two outputs in parallel to a single load with local sensing If it is necessary to remote voltage sense at the load parallel the sense leads of output 1 with the sense leads of output 2 and connect to the load as shown in the figure in the right OUTPUT 2 OUTPUT 1 OUTPUT 2 OUTPUT 1 S S S S S S S S roel HHHH r HH LO II
203. upled to a protection condition that occurred on another channel UNR The output is unregulated INH The output is inhibited by an external signal CP The output is limited by the negative power limit STATus QUEStionable CONDition OT The over temperature protection has tripped CP The output is limited by the positive power limit PF The output is disabled by the power fail which may be caused by a low line or bownout condition on the AC line OC The output is disabled by the over current protection OV The output is disabled by the over voltage protection lt chanlist gt 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 power system Series N6700 User s Guide Status Subsystem STATus QUEStionable ENABle lt value gt lt chanlist gt STATus QUEStionable ENABle lt chanlist gt 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 STATus QUEStionable NTRansiton lt value gt lt chanlist gt STATus QUEStionable PTRansiton lt value gt lt chanlist gt
204. ur computer Provided that you have correctly configured the previously discussed LAN settings simply type the instrument s Host name or IP address in your browser to launch the application i To exit out of the menu press the Meter key Use IO Config to configure the TCP IP LAN Client interface Then add your instrument identifiers to the interface software Use an application such as VISA Assistant or the Telnet utility to verify communications with instruments via the LAN The following steps will help you quickly get started connecting your USB enabled instrument to the Universal Serial Bus USB 1 If you do not have the Agilent I O Library software installed on your PC you can download the I O library software from the Agilent web site at http www agilent com find connectivity Connect your instrument to the USB port on your PC The USB interface requires no front panel configuration other than enabling or disabling it To view the instrument s USB connect string use the navigation keys to select the following menu commands System Interface USB Identification The Status command lets you view status information about the interface when it is in use To enable or disable the USB interface select the following menu commands System Interface USB Enable Enable USB This is enabled when shipped To disable the USB simply uncheck this box 37 Configuring the Interface 38 5 You can set or change the in
205. urement system to receive triggers To initiate the measurement trigger system use Front Panel SCPI Command Not Available To initiate the measurement trigger system for all four outputs INIT ACQ 1 4 After a trigger is received and the data acquisition completes the trigger system will return to the idle state Thus it will be necessary to initiate the measurement system each time a triggered measurement is desired Trigger the Measurement The trigger system is waiting for a trigger signal in the initiated state You can immediately trigger the measurement as follows Front Panel SCPI Command Not Available To generate a measurement trigger on output 1 TRIG ACQ 1 Alternatively if the trigger source is BUS you can also program a TRG or an IEEE 488 lt get gt command As previously discussed a trigger can also be generated by another output channel or an input pin on the digital port connector If any of these systems are configured as the trigger source the instrument will wait indefinitely for the trigger signal If the trigger does not occur you must manually return the trigger system to the idle state The following commands return the trigger system to the idle state Front Panel SCPI Command Select Measure Control ABOR ACQ 1 Then select the Abort control 58 Series N6700 User s Guide Series N6700 User s Guide 5 Introduction to Programming SCPI Commands60 SCPI Messages 62 SCPI
206. urrent Programming amp Readback Min Current 10 mA 50 V 10 mA 50 V Current Programming amp Readback High Current 5A 10V 10 A 8 5 V CC Load Effect Source Effect Ripple and Noise 5A 10V 10 A 8 5 V Series N6700 User s Guide Verification Test Record Form Agilent N6761A and N6762A Agilent N6761A and N6762A Report No Date Description Model Minimum Specs Results Maximum Specs Constant Voltage Tests High Range Voltage Prog amp Readback Minimum Voltage Vout Both 9mV 21 mV Front Panel Display Readback Both Vout 6 mV Vout 6 mV High Voltage Vout Both 49 986 V 50 014 V Front Panel Display Readback Both Vout 14 mV Vout 14 mV Low Range Voltage Prog amp Readback Low Voltage Vout Both 5 4976 V 5 5024 V Front Panel Display Readback Both Vout 2 4 mV Vout 2 4 mV CV Load Effect Both 0 5 mV 0 5 mV CV Source Effect Both 0 5 mV 0 5 mV CV Ripple and Noise peak to peak Both N A 6 mV rms Both N A 1 mV Transient Response Voltage at 150 us Both 75 mV 75 mV Constant Current Tests High Range Current Prog amp Readback Minimum Current lout Both 0 8 mA 1 2 mA Front Panel Display Readback Both lout 200 pA lout 200 pA High Current lout N6761A 1 4992 A 1 5008 A N6762A 2 9986 A 3 0014 A Front Panel Display Readback N6761A lout 0 65 mA lout 0 65 mA N6762A lout 1 1 mA lout 1 1 mA Low Range Current Prog amp Readback Low Current Full Scale lout Both 0 099945 A 0 100055 A F
207. ut SOURce DIGital PIN2 FUNCtion SOURce DIGital PIN3 FUNCtion DIO DINPut TOUTput TINPut INHibit SOURce DIGital PIN3 FUNCtion These commands set the functions of the three digital port pins The pin functions are saved in non volatile memory DIO The pin is a general purpose ground referenced digital input output The output can be set with SOURce DIGital OUTPut DATA lt value gt DINPut The pin is in digital input only mode The digital output data of the corresponding pin is ignored TOUTput The pin is configured as a trigger output When configured as a trigger output the pin will only generate output triggers if the Step or List transient system has been configured to generated trigger signals TINPut The pin is configured as a trigger input When configured as a trigger input the pin can be selected as a source of measurement and transient trigger signals FAULt Applies only to pin 1 Setting FAULt means that pin 1 functions as an isolated fault output The fault signal is true when any output is in a protected state from OCP OVP OT PF or INH Note also that Pin 2 serves as the isolated common for pin 1 When pin 1 is set to the FAULt function the instrument ignores any commands to program pin 2 Queries of pin 2 will return FAULLt If pin 1 is changed from FAULt to another function pin 2 is set to DINPut INHibit Applies only to pin 3 When pin 3 is configured as an inhibit input a true signal at the
208. ut continued PROTection CLEar chanlist COUPle lt Bool gt DELay lt NRf gt chanlist RELay STATe lt Bool gt chanlist SENSe CURRent DC RANGe UPPer lt NRf gt chanlist FUNCtion VOLTage CURRent chanlist SWEep OFFSet POINts lt NRf gt chanlist POINts lt NRf gt chanlist TINTerval lt NRf gt chanlist VOLTage DC RANGe UPPer lt NRf gt chanlist WINDow TYPE HANNing RECTangular chanlist SOURce CURRent LEVel MMediate AMPLitude lt NRf gt chanlist TRIGgered AMPLitude lt NRf gt chanlist MODE FlXed STEP LIST chanlist PROTection STATe lt Bool gt chanlist RANGe lt NRf gt chanlist DIGital INPut DATA OUTPut DATA lt NRf gt PIN1 PIN2 PIN3 FUNCtion DIO DINP TOUT TINP FAUL INH2 POLarity POSitive NEGative LIST COUNt lt NRf gt INFinity chanlist CURRent LEVel lt NRf gt lt NRf gt chanlist POINts chanlist DWELI lt NRf gt lt NRf gt chanlist POINts chanlist STEP ONCE AUTO chanlist TERMinate LAST lt Bool gt chanlist TOUTput BOSTep DATA lt Bool gt lt Bool gt chanlist POINts chanlist EOSTep DATA lt Bool gt lt Bool gt chanlist POINts chanlist VOLTage LEVel lt NRf gt lt NRf gt chanlist POINts chanlist STEP TOUTput
209. utput terminals to the remote distribution terminals by a pair of twisted or bundled wires Connect each load to the distribution terminals separately Remote voltage sensing is recommended under these circumstances Sense either at the remote distribution terminals or if one load is more sensitive than the others directly at the critical load is SENSE JUMPERS INSTALLED FOR LOCAL SENSING TWIST LEADS Positive and Negative Voltages Either positive or negative voltages can be obtained from the output by grounding or commoning one of the output terminals Always use two wires to connect the load to the output regardless of where or how the system is grounded The instrument can be operated with any output terminal 240 VDC including output voltage from ground Response Time with an External Capacitor When programming with an external capacitor voltage response time may be longer than that specified in Appendix A Use the following formula to estimate the additional response time for up programming Response Time Added Output Capacitor X Change in Vout Current Limit Setting Note that programming into an external output capacitor may cause the power system to briefly enter constant current or constant power operating mode which adds additional time to the estimation Series N6700 User s Guide Connecting the Outputs Remote Voltage Sensing Because of the unavoidab
210. vailable Use the navigation keys to highlight the Enable OVP control This control enables or disables over voltage protection Pressing SEL or Enter will check or uncheck this control Use the navigation keys to highlight the OVP Level control as shown below Enter the desired over voltage level using the numeric keypad Then press Enter Chan 1 Protect OVP Enable OVP TAE od Press the Channel key at any time to select a different output channel This can save time because you can directly access the OVP control of each channel without having to navigate through the menu levels Chan 2 Protect OWP OVP Level 54 000 If you program an over voltage protection level that is lower than the present output voltage the over voltage protection circuit will trip and turn the output channel off The status indicator will show OV Exiting the Command Menu There are two ways to exit the command menu Press the Meter key to immediately return to the metering screen This is the quickest way to return to metering mode Press the Back key to back up one level at a time in the command menu This method may be more convenient if there are other menu commands to be given Detailed instructions on how to use the power system s functions and capabilities are found in the next chapter Detailed information about the SCPI programing commands are found in chapters 5 and 6 In Case of Trouble Series N6700 User s Guide P
211. vailable System Interface LAN Web To enable the Web server check the Enable Web Server checkbox Series N6700 User s Guide Programming High Speed Test Extensions Programming High Speed Test Extensions The High Speed Test Extensions described in this section are not available on all models Refer to Chapter 1 Model Differences for model specific information The List Function Either output voltage or output current or both together may be list controlled List mode lets you generate complex sequences of output changes with rapid precise timing which may be synchronized with internal or external signals Lists can contain up to 512 individually programmed steps and can be programmed to repeat themselves The voltage and current lists are paced by a separate list that defines the duration or dwell of each step Each of the up to 512 steps can have an individual dwell time associated with it which specifies the time in seconds that the list will remain at that step before moving on to the next step If you need an output list to closely follow external events then a trigger paced list is more appropriate In a trigger paced list the list advances one step for each trigger received As previously discussed a number of trigger sources can be selected to generate triggers With a trigger paced list you do not need to program a dwell time for each step If you do program a dwell time triggers that are received during
212. within a single message Use a semicolon to separate commands within a message There is an implied header path that affects how commands are interpreted by the power system 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 OUTPut STATe ON 1 PROTection CLEar 1 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 OUTPut was omitted because after the OUTPut STATe ON command the header path became 60 Series N6700 User s Guide SCPI Commands defined as OUTPut and thus the instrument interpreted the second command as OUTPut PROTection CLEar 1 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 OUTPut OUTPut PROTection CLEar 1 which is incorrect 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 begi
213. ws are firmly finger tightened 4 Set the power system s GPIB address The power system is shipped with its GPIB address set to 5 Use the front panel menu if you need to change the GPIB address a To access the front panel menu press the Menu key b To view the GPIB address use the front panel navigation keys to select System Interface GPIB c To change the address use the numeric keys to enter a new value Valid addresses are from 0 to 30 Press the Enter key d To Exit out of the menu press the Meter key 5 Configure the GPIB interface card on your PC Use IO Config to configure the installed GPIB interface card s parameters 6 Use an application such as VISA Assistant to verify communications with instruments via the GPIB interface 34 Series N6700 User s Guide Configuring the Interface LAN Interface The following steps will help you quickly get started connecting and configuring your LAN enabled instrument 1 Ifyou do not have the Agilent I O Library software installed on your PC you can download the I O library software from the Agilent web site at http www agilent com find connectivity 2 Connect your instrument to the LAN Configure your power system As shipped from the factory the power system s pre configured settings will probably work in most LAN environments If you need to manually configure these settings you can do so using the instrument s front panel menu Press the Menu key to acc
214. y delay for output 1 and a 100 Select either Turn on or Turn off millisecond turn on delay for output 2 OUTP DEL RISE 05 1 Enter a delay in seconds then OUTP DEL RISE 1 2 press Select To turn on outputs 1 and 2 OUTP ON 1 2 To program a 200 millisecond turn off delay for outputs 3 and 4 OUTP DEL FALL 2 3 4 To turn off outputs 3 and 4 OUTP OFF 3 4 Set the Over Voltage Protection When over voltage protection is enabled the power system will turn off its output if the output voltage reaches the over voltage limit Front Panel SCPI Command Select Protect OVP To set the OVP level for outputs 1 and Check the OVP enable box and 2 to 10 V press Select VOLT PROT 10 1 2 Enter a value in the OVP level box To enable OVP for output 1 and 2 and press Select VOLT PROT STAT 1 1 2 Set the Over Current Protection Series N6700 User s Guide When over current protection is enabled the power system will turn off its output if the output current reaches the current limit setting Front Panel SCPI Command Select Protect OCP To enable OCP for output 1 and 2 Check the OCP enable box and CURR PROT STAT 1 1 2 press Select 41 Synchronizing Output Steps Clear Output Protection Functions If an over voltage over current over temperature inhibit signal or a power fail condition occurs the power system turns off the affected output channel The PROT annunciator on the

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