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N6700 User`s Guide

1. Mainframe 1 Mainframe 2 Mainframe 3 123 45 674 123 45 674 123 45 674 ON Couple OFF Couple a Common Only two of the digital connector pins on each mainframe can be configured as ONCouple and OFFCouple on each synchronized mainframe The designated pins will function as both an input and an output with a negative transition on one pin providing the synchronization signal to the other pins Front Panel SCPI Command For mainframe 1 select To configure pin 6 of mainframe System IO DigPort Pin6 1 as the ON control Select Function then ONCouple DIG PIN6 FUNC ONC To configure pin 7 of mainframe 1 as the OFF control DIG PIN7 FUNC OFFC Repeat these commands for mainframes 2 and 3 Select Pins select pin 7 then select Function then OFFCouple Repeat these steps for mainframes 2 and 3 Operation Once configured and enabled turning the output on or off on any coupled channel will cause all coupled channels on all configured mainframes to turn on or off according to their user programmed delays This applies to the front panel On Off key the Web server and to SCPI com
2. If the specified integration period is at or near the minimum logging intervals the data format must be specified as binary If binary format is not specified the data will be in ASCII format and the minimum logging intervals will typically be up to five times longer than what can be achieved with binary format Front Panel SCPI Command Not Available To set the data format to binary FORM DATA REAL Select the Data Logger Trigger Source BUS EXTernal IMMediate PIN lt n gt Keysight N6700 User s Guide The TRIGger ELOG command generates an immediate trigger regardless of the trigger source Unless you are using this command select a trigger source from the following Selects GPIB device trigger TRG or lt GET gt Group Execute Trigger Selects any pin configured as a trigger input as the trigger source Selects the immediate trigger source This triggers the data logger immediately when initiated Selects a pin on the digital port lt n gt specifies the pin number The pin must be configured as a Trigger Input to be used as a trigger source see Appendix C Use the following commands to select one of the available trigger sources Front Panel SCPI Command Not Available RIG ELOG SOUR BUS 1 or RIG ELOG SOUR IMM 1 or RIG ELOG SOUR EXT 1 or RIG ELOG SOUR PIN lt n gt 1 93 4 Operating the P
3. 1 If you have not already done so install the Keysight IO Libraries Suite from the Automation Ready CD that is shipped with your product 2 Ifyou do not have a GPIB interface card installed on your computer turn off your computer and install the GPIB card 3 Connect your instrument to the GPIB interface card using a GPIB interface cable 4 Use the Connection Expert utility of the Keysight IO Libraries Suite to configure the installed GPIB interface card s parameters 5 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 Press the Menu key then use the navigation keys to select System IO GPIB b Use the numeric keys to enter a new value Valid addresses are from O to 30 Press the Enter key to enter the value Press the Meter key to exit the menu Keysight N6700 User s Guide Getting Started 3 6 You can now use Interactive IO within the Connection Expert to communicate with your instrument or you can program your instrument using the various programming environments USB Interface For detailed information about USB interface connections refer to the Keysight Technologies USB LAN GPIB Interfaces Connectivity Guide located on the Automation Ready CD that is shipped with your product The following steps will help you quickly get started connecting your USB enabled instrument to the Universal Ser
4. Step 2 To install a power module align the module over the pins and push it down onto the mainframe connector oe 0000 H MEE Os poon Keysight N6700 User s Guide 27 2 Installation Step 3 Use a T10 Torx driver and install the screws at each end of the power module Because the RFI strips apply upward pressure continue pushing down on the module until the screws are tight Step 4 Replace the blower cover when finished Carefully fit the spring clips under the lip of the power modules Rack Installation You cannot use support rails for rack mounting your instrument Support rails would block the airflow needed for cooling Use Rack Mount kit Option 908 to rack mount your instrument The Rack Mount Kit is also available by ordering part number N6709A Keysight N6700 MPS mainframes can be mounted in a 19 inch EIA rack cabinet They are designed to fit in one rack unit 1U of space Do not block the air intake and exhaust at the sides of the unit or the exhaust at the rear of the unit Tools required Phillips driver T22 Torx driver T10 Torx driver Step 1 Install eight clip nuts on the rack frame 2 in each corner where your instrument will be located 28 Keysight N6700 User s Guide Installation 2 Step 2
5. ee 59 O DE ici 13 Orale 13 OPUS A tc e 24 OSCILLATION protectiON anaa ea A 89 Ou a td 13 OUTLINE diagr a on ae id 26 102 output pancia oeae a al 66 ATEI NEEE nt da O 47 64 65 TOUS EET EE ii dete 8 QlOUPS a vival See aa 39 95 als serve INT 37 Polarity reversal i mei cease ede dba 65 A EAE ESA PEE EE IEEE EAT T T 73 Quadra 122 PESIStANCE ato 66 O ti tb dae 108 E AEEA EEE EE EEE EEEREN 68 CU ista ii oe Tree 67 A tea tiliwk aeitated 65 output trigger Enola aliadas nda ando 68 a tie tie ica 70 Mii 69 eliana iaa pitos 68 TOLIKE E EEE AAAS 69 outputs In paralelno aa 39 OUTPUTS ISERIES a a n E RA 41 Keysight N6700 User s Guide LM sa tte O 13 Over current protect eresia aa 87 over voltage protection 37 86 aTa OE 37 SEUNG hiciere lle dle eh nant ney het Ad theta 48 A 86 P parallel Output lis 95 PassWord IC osos aleros dando del MT Cod oa AL ad 59 ton panela dan 96 PE Al o cola tliat enemy 13 poweralloca Oct cri 110 POWEF cord CONE AL 30 power tactor 4OQ AZ tarda 29 power receptacles cion E 26 prestiggen dada cutaricarataltac petite 81 o o a A 2 ProrIEy MOE acti ti uae oa aside 122 PROT coana cesta trons E re trenrtetrearr etre 13 protection Cl Mies iria 89 O 88 TUNCUONS ti 86 Watchdog timen espasa ana 88 PU unicidad E aS 73 R FACKIMOUMDING ZO Wale a ate ea el 28 LOGISFEQUITE aes aslo a adie Astin aac 28 RECTAN GUA rt octet tb 81 relay OUT titi dali 65 remote interface CA O te 59 SOCU
6. N6753A N6756A N6763A N6766A Application Specific N6783A N6783A BAT MFG 80 W 80 W 24 W 18 W e e e e e Option 761 Option 761 e e e e e e e 4 4 4 4 3 2 2 e e e e e e e e e e e e e e e e e e e e e e 1 Output current is limited to 10A max on Models N6742B and Option 760 is not available on Models N6741B N6751A N6752A N6761A and N6762A Option 2UA is only available on Models N6761A and N6762A 3 Only available when using the remote interfaces not from the 20 W 20 W Oo e e 3 3 3 4 3 3 4 4 e o Oo Oo e e Oo Oo N6773A with Option 760 tincludes Option 761 ront panel List capability is not available on the negative current output on Model N6783A 10 Keysight N6700 User s Guide Quick Reference 1 The Front Panel At a Glance Display Navigation keys Output keys Turns off after 1 hour of 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 gee eS l Ye e o ola e ee Owe lo fare E E a J fo J o CV Set 20 000V 5 500A at amp bal ORS E J ss On Off switch and LED System keys Numeric entry keys LED indicates power ison Toggle between single channel and Enter values Green normal operation multiple channel view Arrow keys increment Amber disp
7. 2 The subsequent daisy chained fault signal which is sourced by the Inhibit signal Even when the initial fault condition or external signal is removed the Inhibit fault signal is still active and will continue to shut down the outputs of all the mainframes Output State To clear the daisy chained fault signal if the operating mode of the Inhibit input is Live simply clear the output protection on any ONE mainframe as explained in chapter 4 If the operating mode of the Inhibit input is Latched turn off the Inhibit input on ALL mainframes individually To re enable the chain re program the Inhibit input on each mainframe to Latched mode Only pins 4 through 7 can be configured to control the output state This function lets you connect multiple Keysight N6700 mainframes together and synchronize the output on off sequence across mainframes Refer to Appendix D for detailed information Keysight N6700 User s Guide KEYSIGHT TECHNOLOGIES Appendix C Power Allocation Power Omit DON patata 110 Module Power Allocation cccscscsseesssessssessstesssessstessstesssecssseesseees 111 This appendix discusses the power allocation function For the majority of Keysight N6700 Modular Power System configurations full power is available from all installed power modules However it is possible to configure a power system in which the combined ratings of the power modules exceed the power rating of the mainframe
8. Keysight 1253 7187 Molex 39422 0002 Keysight 1253 8485 Phoenix Contact FMC 1 5 2 ST 3 5 Keysight 8120 8821 Phoenix Contact EPB 2 5 1733169 Keysight 0360 2935 Phoenix Contact 3118151 Keysight 1253 5830 Phoenix Contact MC 1 5 4 ST 3 5 N A 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 Keysight Sales and Support Office immediately Refer to www keysight com find assist Until you have checked out the power system save the shipping carton and packing materials in case the unit has to be returned 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 Keysight Sales and Support Office Keysight N6700 User s Guide 25 2 Installation A Installing the Unit 26 Safety Considerations Environment WARNING This power system is a Safety Class 1 instrument which means it has a protective earth terminal That terminal must be connected to earth ground through a power source equipped with a ground receptacle Refer to the Safety Summary page at the beginning of this guide for general safety information Before installation or operation check the power system and review this guide for safety warnings and instructions Safety warnings for specific procedur
9. View Selects 1 channel or 4 channel view at turn on Keys Enables disables key clicks and configures the On Off key Lock Locks front panel keys Enter a password to unlock the front panel Admin Login Logout Enter a password to access the admin functions Cal Volt Vprog Calibrates High and Low voltage ranges Vlim Calibrates voltage limit High and Low ranges Vmeas Calibrates High Low and Aux voltage measurement ranges Curr Iprog Calibrates High and Low current ranges Ilim Calibrates current limit Imeas Calibrates High and Low current measurement ranges Misc CMRR Calibrates common mode rejection ratio Dprog Calibrates the downprogrammer Ipeak Calibrates peak Resistance Calibrates output resistance High and Low ranges Date Saves the calibration date for each channel Save Saves the calibration data LAN Enables disables the LAN interface and the built in Web server USB Enables disables the USB interface Nvram Resets all non volatile RAM settings to their factory defaults Password Changes the password for the admin functions About Frame Displays model serial number and firmware revisions Module Displays model serial number options voltage current power Keysight N6700 User s Guide 15 1 Quick Reference SCPI Command Summary Subsystem Commands Some optional commands have been included for clarity All settings commands have a corresponding query Not all commands apply to all models SCPI Command Descript
10. 051 Note that you can program a common delay that is longer than the maximum delay offset of the mainframe You may choose a longer value to make your program flexible for future configurations that may have power modules with longer delay offsets However if you program a value that is shorter than the maximum delay offset you may experience improper synchronization across all outputs There is no need to specify a delay offset when outputs turn off Outputs start executing their turn off delays as soon as an output Off command is received Keysight N6700 User s Guide Output On Off Synchronization Appendix D Synchronizing Multiple Mainframes Procedure The output turn on synchronization function can be used across multiple mainframes that have coupled output channels Each mainframe that will be synchronized must have at least one coupled channel Note that cross frame synchronization must be enabled for any mainframe that contains synchronized output channels 1 Configure the output channels on each mainframe as described in steps 1 through 3 of the previous procedure 2 This step is required if you have power modules with different minimum delay offsets Specify a common delay offset for all of the synchronized output channels This value must be the largest delay offset of all synchronized output channels regardless of the mainframe in which they are installed This same value must be specified as the common delay o
11. 38 WITH LOCAL SENSING JUMPERS INSTALLED TWIST LEADS OUTPUT 3 OUTPUT 1 S LS LS S S LS LS S i i NA WITH REMOTE SENSING Keysight N6700 User s Guide Installation 2 The following figure shows the paralleled connections for N678xA SMU power modules Note that remote sensing is not normally used in Current Priority mode OUTPUT 2 OUTPUT 1 F G fase F G 8 G48 SENSE JUMPERS INSTALLED FOR LOCAL SENSING TWIST LEADS Grouping the Outputs Once outputs have been connected in parallel they can be configured or grouped to act as a single higher power channel This applies when programming via the front panel or using SCPI commands How to group output channels that have been connected in parallel is discussed in Chapter 4 under System Related Operations The output grouping function is not available for N678xA SMU power modules If you are not grouping output channels first program both outputs to the desired output voltage Then program the current limit of each output In Current Priority m
12. A ten ett diets ar AE ART 2 Ni 0d 13 inhibit input CONMIGUIING E E en iat a tale diek fake 107 COMMECTIONS reetccetctatsuntventetntesaea a aSa 107 INSPECH Ones ate teh Orne detea TAAA ENE 25 Stalin ead a Tos Oden Saati OO 26 instrument identificato Aisi a iets a E 94 Storing States farttecusatseetecnaeiytomat iaaiiai 94 OR eR IEI be Ren A 12 50 PAC GOSS a ts ede nae a ee 54 ITEMS SUBDUED vetada lia ti 25 L BAN INEGI ACE aerate ca ctetere tine 12 51 52 53 parametelS sica 54 A aidadid aidan iE 52 SILO AES o aac 52 SOCKETS ita tt ale wats Ea 58 Telnet T a tenets andes NR 58 list AMD scones sities enata Vaasa te a 79 programming sete dicot tr Me tear AEREA 72 load CONNECTIONS stat tt ls 31 lockout front panel ooooonnonnnnnnncnnconnonccconcnnnos 96 M measure COMMANAS ccccooocccnooncnnnononanononnnnninonnnnss 77 measurement seamless QUTOrANGING eee 80 91 measurement features 9 measurement trigger gener Eon eae atte 85 A ETA 84 A A creas tec cd DAMES 83 126 measurements AITO AAA E E 82 CONVENE isa radi ita fede iti iodination 83 Hanning WINDOW mesisan an 81 Rectangular WIN Wa uste era 81 SamplesiMterVal a aid 80 simultaneous V and Mosesin 78 Mena n 48 Model aerea 10 ModeNUnDES escalada 24 multiple load connections nu na i 35 N N6781A auxiliary Measurements n se 78 resistance Programming uu cee 66 N678xA digitizing Speet AAA A E 80 wire length requirement ocios 33 non volatile RAM settingS
13. at the beginning of this chap ter On power modules with the 50A sense connector the LS and LS terminals are ONLY used for local sense connections as illustrated Do not connect these terminals in any other way G 48 G S INSERT WIRES TWIST LEADS LOAD SENSE JUMPERS INSTALLED FOR LOCAL SENSING TIGHTEN SCREWS 50 A CONNECTOR 12A amp 20 A CONNECTOR LOCKING LOCKING SCREW SCREW 50A y SENSE S LS LS S INSERT WIRES TWIST LEADS Keysight N6700 User s Guide SENSE JUMPERS INSTALLED FOR LOCAL SENSING 31 2 Installation Wire Size WARNING FIRE HAZARD Select a wire size large enough to carry short circuit current without overheating refer to the table below To satisfy safety requirements load wires must be heavy enough not to overheat while carrying the short circuit output current of the unit Keysight Model N678xA SMU wiring requirements are described on the following page Along with conductor temperature you must also consider voltage drop when selecting wire sizes The following table lists the resistance for various wire sizes and the maximum lengths to limit the voltage drop to 1 0 V per lead for various currents Not
14. been configured or grouped to act as a single higher power channel are assigned the channel number of the lowest numbered slot of the group Keysight N6700 User s Guide Installation 2 Power Module Installation The information in this section applies if you have purchased an N6700 mainframe without the power modules installed or if you are adding a power module to the mainframe CAUTION Turn the mainframe off and disconnect the power cord before installing or removing power modules Observe all standard electrostatic discharge precautions before handling electronic components 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 O Torx driver Small flat blade screwdriver Tools required T Firmware Note Newer power modules can only be installed in N6700 mainframes with the latest firmware Refer to the Updates section in the front of this manual for more information If your mainframe has the latest firmware version install the power module If not download and install the latest version firmware from the web Step 1 Remove the blower cover Remove the screws from the top and sides of the blower cover Tilt the cover up and slide it out
15. the trigger system will return to the idle state When this occurs you can use FETCh queries to return the measurement data Front Panel SCPI Command Not Available To return average voltage amp current FETC VOLT 1 ETC CURR 1 return RMS voltage amp current C VOLT ACDC 1 ETC CURR ACDC 1 return the high level of a pulse C VOLT HIGH 1 ETC CURR HIGH 1 return the low level of a pulse ETC VOLT LOW 1 ETC CURR LOW 1 return the maximum value ETC VOLT MAX 1 ETC CURR MAX 1 return the minimum value C VOLT MIN 1 ETC CURR MIN 1 return power ETC POW 1 e1 e1 Hy O RAO RH OH O tr O o O FH Power can only be measured on power modules with simultaneous measurement capability see chapter 1 Model Differences If a FETCh query is sent before the measurement is finished the response will be delayed until the measurement trigger occurs and the acquisition completes You can test the MEAS_active bit in the operation status register to know when the measurement trigger system has returned to the idle state Front Panel SCPI Command Not Available To query the MEAS_ active bit bit 5 STAT OPER COND 1 If a bit value of 32 is returned in the query the MEAS_active bit is true and the measurement is NOT complete When the MEAS_active bit is false you
16. 4 does not apply when using Low bandwidth mode Guard Connection The purpose of a cable guard is to eliminate the effects of leakage current that can exist in the current path of the external test circuit The cable guard can be used when the test fixture requires guarding and the power system is sourcing or measuring DC currents under 1 uA Without a guard leakage currents in the test circuit could affect the accuracy of the micro amp measurements Guarding is generally not required when measuring currents 1 WA and greater As shown below cable guards are available at the output connector of Keysight Models N678xA SMU The guard is typically used to drive the shields of cables and test fixtures It provides a buffered voltage that is at the same potential as the output terminals of the module connector The guard current is limited to about 300 yA lelte _guarp Keysight N6700 User s Guide Installation 2 Multiple Loads If you are using local sensing and are connecting multiple loads to one output connect each load to the output terminals using separate connecting wires as shown in the following figure 12A amp 20 A 50 A 8A CONNECTOR S S CONNECTOR CONNECTOR G 8 G S S 50A SENSE S LS LS S INSTALLED FOR LOCAL SENSING TWIST O O A SENSE JU
17. 5 V VOLT 5 1 To set all outputs to 10 V VOLT 10 1 4 For models with multiple ranges you can select a lower range if you need better output resolution Front Panel Press the Voltage key Select a lower range and press Select SCPI Command To select the lower range program a value that falls within the range VOLT RANG 5 1 For Keysight Models N678xA SMU operating in current priority mode you can specify a Voltage limit which limits the output voltage at the specified value In current priority mode the output current remains at its programmed setting as long as the output voltage is within the positive or negative limit Check Tracking to let the negative voltage limit track the positive voltage limit setting Front Panel Press the Voltage key Specify a Voltage limit and or a Voltage limit and press Select Check the Tracking box if you want the limit to track the limit SCPI Command To select the voltage limit VOLT LIM 5 1 To select the negative voltage limit VOLT LIM NEG 3 1 To enable voltage limit tracking VOLT LIM COUP ON 1 Keysight N6700 User s Guide Operating the Power System 4 Set the Output Current SCPI Command To set output 1 to 1 A CURR 1 1 To set all outputs to 2 A CURR 2 1 4 Front Panel Press the Current key Enter a value and press Select For models with multiple ranges you can s
18. 6 V 7 I oc V limit 8 A setting 3A ao Current 8 A 3 A 1A Voltage as operation V limit OC applies to N6784A only Z 20 V Key 6 V Sourcing power Sinking power gt Programmable Keysight N6700 User s Guide 123 Appendix E Source Operating Modes 124 The heavy solid line illustrates the locus of possible operating points as a function of the output load As shown by the vertical portion of the line the output current remains regulated at its programmed setting as long as the output voltage remains within the positive or negative voltage limit setting A CC constant current status flag indicates when the output voltage is within the limit settings If the output voltage reaches either the positive or negative voltage limit the unit no longer operates in constant current mode and the output current is no longer held constant Instead the power supply will now regulate the output voltage at its voltage limit setting Either a LIM positive voltage limit or LIM negative voltage limit status flag is set to indicate that either the positive or negative voltage limit has been reached As shown by the horizontal portions of the load line when the unit is sinking power the output current may continue to increase in the positive or negative direction as more current is forced into the unit Once the current is exceeds 112 of the rated current of the range the output wil
19. According to EN 27779 Type Test Schalldruckpegel Lp lt 70 dB A Am Arbeitsplatz ormaler Betrieb Nach EN 27779 Typpr fung Output Terminal Isolation Maximum Rating N6781A N6785A Note AC Input Input Ratings Power Consumption Power Factor NOTE Fuse N6702A Note o output terminal may be more than 240 VDC from any other terminal or chassis ground When using the AUX measurement input terminals on Models 6781A and N6785A no output or input terminal may be more than 60 VDC from any other terminal or chassis ground 100 VAC 240 VAC 50 60 400Hz 1000 VA N6700B 1440 VA N6701A 1440 VA N6702A lt 180 VAC input 2200 VA N6702A gt 180 VAC input 0 99 nominal input and rated power Internal fuse not customer accessible AC mains circuits rated at 100 180 VAC cannot supply enough current to power the N6702A mainframe when operated at its full rated power When connected to a 100 180 VAC mains internal circuits will limit the power available to modules to 600 W maximum Net Weight N67008B with 4 power modules N6701A with 4 power modules N6702A with 4 power modules Single power module typical 12 73 kg 28 lbs 11 82 kg 26 lbs 14 09 kg 31 lbs 1 23 kg 2 71 lbs Dimensions Refer to the outline diagrams on the following page 1 Under full load at 400 Hz power factor drops from 0 99 120 VAC to as low as 0 76 265 VAC Power factor degrades further under
20. An immediate trigger command either from the front panel or over the bus will generate an immediate trigger regardless of the trigger source Bus Pin lt n gt Transient lt n gt Ext Unless you are using the front panel menu or a TRIGger TRANsient 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 connector as the trigger source lt n gt specifies the pin number The selected pin must be configured as a Trigger Input in order to be used as a trigger source see Appendix B Selects the output channel s transient system as the trigger source lt n 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 Generate Trigger Out Signals Selects any pin configured as a trigger input as the trigger source Use the following commands to select a trigger source SCPI Command To select Bus triggers for output 1 Transient TrigSource Select Bus TRIG TRAN SOUR BUS 1 To select Digital pin triggers To select Digital pin triggers select Transient TrigSource Then TRIG TRAN SOUR PIN lt n gt 1 select one of the digital port pins where n is the pin number To select Transient output triggers To select Transient output triggers select Transient TrigSource Then TRIG TRAN SOUR TRAN lt n g
21. Bus and press Select TRIG TRAN SOUR BUS 1 Initiate the transient 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 74 Front Panel SCPI Command Select Transient Control TRG Select Trigger and Press Select Keysight N6700 User s Guide Operating the Power System 4 Program an Arbitrary List The following procedure shows how to generate the list of voltage changes as illustrated in the following figure Trigger Step 1 Step 2 Step 3 Step 4 Keysight N6700 User s Guide O 1 2 3 4 5 List Count 2 Lo ListCount 1 e 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 TransientiMode Set the To program output 1 use Voltage mode to List Press Select VOLT MODE LIST 1 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 outp
22. Front Panel SCPI Command Not Available To query the WTG_meas bit bit 3 STAT OPER COND 1 If a bit value of 8 is returned in the query the WTG_meas bit is true and the instrument is ready to receive the trigger signal Refer to the N6700 Programmer s Reference Help file for more information It will be necessary to initiate the measurement trigger system each time a triggered measurement is desired Keysight N6700 User s Guide 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 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 85 4 Operating the Power System 86 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 Fetch the Measurement After a trigger is received and the data acquisition completes
23. Install the two front ears and the two rear extender supports 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 extender supports If the standard extender supports are either too short or too long use the longer supports c Cut the supports if required d Step 3 Install the two rear ears on the back of the instrument rack as shown in the figure Use four plain 10 32 screws to install the rear ears Step 4 Slide the instrument into the rack making sure that the rear extender supports are aligned inside the rear ears Step 5 Attach the front ears to the front of the instrument rack using the four dress 10 32 screws provided Step 6 This is optional Insert a plain 10 32 screw through the slot of the rear ear and extender support Attach it with a clip nut Note that this will prevent the unit from being slid out of the front of the rack Bench Installation CAUTION Do not block the air intake and exhaust at the sides or the exhaust at the rear of the unit Refer to the outline diagram in Appendix A Minimum clearances for bench operation are 2 inches 51 mm along the sides and back 400 Hz Operation Redundant Ground Requirement At 400 Hz AC input operation the leakage current of the unit exceeds 3 5 MA This requires the installation of a permanent redundant ground from the instrument chassis to earth ground This ensures that ground will
24. Negative DIG PRINZ FUNG LINE To select the trigger polarity DIG PIN lt 1 7 gt POL lt pol gt Keysight N6700 User s Guide Using the Digital Port Appendix B Fault Output Pins 1 and 2 can be configured as a fault output pair The polarity of pin 1 can also be configured Pin 1 is the Fault output pin 2 is the common for pin 1 Note that pin 2 must also be connected to pin 8 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 power fail condition or on some models a power limit condition Both pins 1 and 2 are dedicated to this function This provides for an optically isolated output Pin 2 s function is ignored Note that the Fault output signal remains latched until the fault condition is cleared You must also clear the protection circuit SCPI Command To configure the Fault function DIG PIN1 FUNC FAUL To select the fault output polarity DIG PIN1 POL lt pol gt Front Panel Select SystemWOWDigPortWPins Select pin 1 then Function then Fault Out In the Polarity field select 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 Pin 8 is the common for pin 3 The Inhibit Input function lets an external state of all o
25. OFF CURR LIM COUP O SENS ELOG FUNC VOLT OFF CURR LIM NEG MIN SENS ELOG FUNC VOLT MINM OFF CURR MODE FIX SENS ELOG PER 0 1 CURR PROT DEL 0 02 SENS ELOG VOLT RANG AUTO OFF CURR PROT DEL STAR SCH SENS FUNC VOLT CURR PROT STAT OF SENS FUNC CURR OFF CURR RANG AX SENS FUNC VOLT O CURR SLEW 9 9E 37 SENS FUNC VOLT INP AIN CURR SLEW MAX O SENS SWE POI 1024 or 4883 CURR TRIG IN SENS SWE OFFS POIN 0 DIG OUTP DATA 0 SENS SWE TINT 20 48E 6 DISP VIEW ETER1 SENS SWE TINT RES RES20 IT CONT TRAN OFF SENS VOLT RANG AX LIST COUN 1 SENS VOLT RANG AUTO OFF LIST CURR N SENS WIND RECT LIST DWE 0 001 STEP TOUT FALSE LIST STEP AUTO TRIG ACQ CURR l LIST TERM LAST OFF TRIG ACQ CURR SLOP POS LIST TOUT BOS OFF TRIG ACQ SOUR BUS LIST TOUT EOS OFF TRIG ACQ TOUT OFF LIST VOLT MIN TRIG ACQ VOLT l OUTP OFF TRIG ACQ VOLT SLOP POS OUTP COUP OFF TRIG ELOG SOUR BUS OUTP DEL FALL 0 TRIG TRAN SOUR BUS OUTP DEL RISE 0 VOLT l OUTP PMOD VOLT VOLT BWID LOW OUTP TMOD LOWZ VOLT LIM AX OUTP PROT COUP OFF VOLT LIM COUP O OUTP PROT DEL 0 02 VOLT LIM NEG l OUTP PROT OSC ON VOLT MODE FIX OUTP PROT WDOG OFF VOLT PROT DEL 0 OUTP REL POL NORM VOLT PROT REM AX POW LIM MAX VOLT PROT REM NEG IN RES 0 VOLT RANG AX RES STAT OFF VOLT SLEW 9 9E 37 SENS CURR CCOM ON VOLT SLEW MAX ON SENS CURR RANG MAX SOUR VOLT TRIG IN SENS CURR RANG AUTO OFF 22 Keysight N6700 User s Guide KEYSIGHT TECHNOLOGIES 2 Installation General NOM surtia R
26. RES20 Values above 20 48 microseconds are rounded to the nearest 40 96 microsecond increment when the resolution is set to RES4O You can change the time interval resolution as follows Front Panel SCPI Command Not Available To set the resolution to 20 microseconds SENS SWE TINT RES RES20 1 To set the resolution to 40 microseconds SENS SWE TINT RES RES40 41 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 more waveform cycles are in the measurement Front Panel SCPI Command Select Measure Window To set the sense window
27. SENSING 40 The following figure shows the connections for 50A power modules Keysight N6700 User s Guide Installation 2 OUTPUT 3 OUTPUT 1 OUTPUT 3 OUTPUT 1 S 4LS LS S S LS LS S S 4LS LS S 8 LS LS S SENSE JUMPER SENSE INSTALLED JUMPERS INSTALLED Q TWIST LEADS TWIST LEADS a F LOAD LOAD WITH LOCAL SENSING WITH REMOTE SENSING Setting the Outputs Outputs connected together in series cannot be grouped To program outputs connected in series 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 is determined by the output s programmed settings operating point and load condition Because these conditions may change during series operation the front panel status indicator will reflect these changes This is normal Momentary status changes are also normal Effect on Specifications Specifi
28. The data for each channel is a definite length binary block with the byte order specified by the FORMat BORDer command Terminate the Measurement Front Panel SCPI Command Not Available To abort the external data logger ABOR ELOG 1 94 Keysight N6700 User s Guide Operating the Power System 4 System Related Operations 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 front panel Err indicator comes on Press the Error key to display the list of errors on the front panel Refer to the Service Guide for further information Front Panel SCPI Command Cycle AC power TST Instrument Identification For Keysight N6700 mainframes you can return the model number serial number firmware revision backup and active firmware For power modules you can return the model number serial number installed options voltage current 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 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
29. The following table lists this along with some other restrictions that apply to the external data logger Function External Data Logger Data viewing No front panel view or front panel control Data must be exported to a spreadsheet Data storage Buffers measurements for about 20 seconds and requires that the computer periodically reads measurements to prevent the internal buffer from overflowing The computer needs to provide the data storage function Measurement Run independently on each output Some outputs can be running an external resources data log while the remaining outputs can be used in front panel control or used for other SCPI functions Measurement If a power module has only one measurement converter then either voltage or functions current but not both can be logged Logging rate Up to 102 4 microseconds for one parameter with data format set to real Briefly to make external data log measurements Select the measurement functions and ranges Specify the measurement integration period Select the trigger source rigger the data logger Retrieve the data log measurement The external data logger function cannot be programmed from the front panel Select the Measurement Functions and Ranges The following commands select a measurement function Front Panel SCPI Command Not Available To enable voltage or current measurements SENS ELOG FUNC VOLT ON 1 SENS ELOG FUNC CURR ON 1 To enable m
30. always be connected and that any leakage current will be diverted to ground Refer to the Service Guide for installation instructions Power Factor Refer to Appendix A for power factor statistics at 400 Hz operation Keysight N6700 User s Guide 29 2 Installation Connecting the Line Cord 30 WARNING 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 Keysight Sales and Support Office The AC input on the back of your unit is a universal AC input It accepts nominal line voltages in the range of 100 VAC to 240 VAC The frequency can be 50 Hz 60 Hz or 400 Hz Keysight N6702A Mainframe Note Standard AC mains circuits rated at nominal 100 120 VAC cannot supply enough current to power the N6702A mainframe when it is operated at its full rated power Nevertheless the N6702A can be connected to an AC mains circuit rated at nominal 100 120 VAC In this case internal circuits will limit the power available to modules to 600 W As a result of this power limiting the current
31. connection When SRQ goes true the instrument will send the string SRQ nn to the client The nn is the status byte value which the client can use to determine the source of the service request Keysight N6700 User s Guide Securing the Interfaces Getting Started 3 Enable Disable the USB LAN and Web Server Enable USB Enable LAN Enable Web Server The USB interface LAN interface and the Web server are enabled when shipped To enable or disable the USB interface from the front panel press the Menu key and select System Admin USB Check this box to enable the USB Uncheck to disable the USB To enable or disable the LAN interface or Web server press the Menu key and select the following menu commands System Admin LAN Check this box to enable the LAN Uncheck to disable the LAN Check this box to enable the Web server Uncheck this box to disable the Web server The LAN must be enabled in order to enable the Web server If you cannot access the Admin menu it may be password protected Password Protecting the Interfaces Factory Settings and Calibration You can password protect access to the LAN and USB interfaces as well as the non volatile RAM reset and the calibration functions This capability is available in the System Admin menu As shipped from the factory the Admin menu password is O zero This means that you do not have to enter a password to access the Admin menu Simply s
32. de The power rating of Keysight N6700 mainframes is as follows Keysight N6700A B 400 W Keysight N6701A 600 W Keysight N6702A nominal 100 120 VAC 600 W nominal 200 240 VAC 1 200 W Note that the power system will continue to operate normally as long as the combined module output power is within the power rating of the mainframe Appendix C_ Power Allocation Power Limit Operation Mainframe Power Limit If the combined power drawn from all of the power modules exceeds the mainframe s power rating a power fault protection event will occur This causes ALL outputs to turn off and remain off until a protection clear command is given This is explained in chapter 4 under Clear Output Protection Functions A status bit PF will indicate that a power fault protection event has occurred The power allocation function lets you programmatically limit the power that can be sourced from individual power modules thereby preventing the combined power from exceeding the mainframe s rated output power and causing all the outputs to turn off For N6702A mainframes operating at 100 120 VAC nominal the sum of the channel power limit settings cannot exceed 600W due to a restriction on the AC line current There is no restriction when operating at 200 240 VAC nominal Module Power Limit 110 When the power limit has been set to a value less than the maximum rating on a power module and either the output v
33. drawn from the AC mains will be lt 15 A so that standard 100 120 VAC mains circuits will not be overloaded The detachable power cord may be used as an emergency disconnecting device Removing the power cord will disconnect AC input power to the unit Keysight N6700 User s Guide Connecting the Outputs 8A CONNECTOR WARNING terminal block screws securely tightene d Installation 2 SHOCK HAZARD Turn off AC power before making rear panel connections All wires and straps must be properly connected with the Disconnect the connector plug to make your wire connections The 8A connector plug accepts wires sizes from AWG 14 to AWG 30 The 12A connector plug accepts wires sizes from AWG 12 to AWG 30 The 20A connector plug accepts wires sizes from AWG 10 to AWG 24 The 50A connector plug accepts wires sizes from AWG 6 to AWG 20 Wire sizes smaller than AWG 20 are not recommended Connect the load wires to the and terminals Connect the sense wires to the s and s terminals Sense jumpers are provided for local sensing Securely fasten all wires by tightening the screw terminals Insert the connector plug into the back of the unit Secure the 12 Aand 50A connector by tightening the locking screws A chassis ground binding post is located next to the AC input connector for ground connections Part number information for all connector plugs is provided under Items Supplied
34. gt lt Bool gt chanlist POINts chanlist VOLTage LEVel lt NRf gt lt NRf gt chanlist POINts chanlist POWer LIMit lt NRf gt chanlist RESistance LEVel IMMediate AMPLitude lt NRf gt chanlist STATe lt Bool gt chanlist STEP TOUTput lt Bool gt chanlist VOLTage LEVel IMMediatel AMPLitude lt NRf gt chanlist TRIGgered AMPLitude lt NRf gt chanlist BWIDth LOW HIGH HIGH2 HIGH3 chanlist Quick Reference 1 Description Sets the current trigger mode Sets the over current protection programming delay Sets the over current protection programming mode Enables disables over current protection on the selected output Sets the output current range Sets the output current slew rate only N678xA SMU Enables disables the maximum slew rate override N678xA SMU Reads the state of the digital port pins Sets the digital port Sets the selected pin s function Sets the selected pin s polarity Enables disables BUS generated triggers on digital pins Specifies current priority or voltage priority mode N678xA SMU List commands only on N676xA N678xA SMU and Option 054 Sets the list repeat count Sets the current list Returns the number of current list points Sets the list of dwell times Returns the number of dwell list points Specifies how the list responds to triggers Sets the list termination mode Generate triggers at the Beg
35. in increments of 1 As shipped the contrast is set to 50 Front Panel SCPI Command Select Not Available System Preferences Display Contrast Enter a contrast value in the Contrast box Then Press Select View You can specify how the output channels are displayed at turn on Front Panel SCPI Command Select System Preferences DisplayWView To display all channels Check 1 channel to display channel one e VEEN MEIER Check 4 channel to display all channels Keysight N6700 User s Guide Appendix A Specifications Keysight N6700B N6701A N6702A MPS Mainframes 100 This appendix lists the supplemental characteristics of the Keysight N6700 Modular Power System A dimensional line drawing of the mainframe is included at the end of the chapter Supplemental characteristics are not warranted but are descriptions of performance determined either by design or type testing All supplemental characteristics are typical unless otherwise noted Complete specifications and supplemental characteristics information for all power modules are included in the Keysight N6700 Modular Power System Family Specifications Guide This document is available on the Keysight N6700 Product Reference CD that is shipped along with your instrument as well as on the web at www keysight com find N6700 KEYSIGHT TECHNOLOGIES Appendix A Specifications Keysight N6700B N6701A N6702A MPS Mainframes Su
36. input or you can connect an isolated measuring instrument to the load Scope probe N6700 Modular Power System a Disconnecting the load from the output before switching the power system on or off will always protect the load from common mode currents Keysight N6700 User s Guide 43 2 Installation Connecting the Auxiliary Voltage Measurement Input 44 This information only applies to Keysight Models N6781A and N67854 The auxiliary voltage measurement input is located on the rear panel of the Keysight N6781A and N6785A It is primarily used for battery voltage rundown measurements but it is also suitable for general purpose DC measurements The auxiliary voltage measurement input is isolated from other commons It has a bandwidth of about 2 kHz It has one input range 20 to 20 VDC As shown in the following figure auxiliary voltage measurements cannot be made on test points that are at a greater potential than 60 VDC from ground Refer to chapter 4 under Making Measurements for more information When using the auxiliary voltage measurement input no output terminal or measurement input terminal may be more than 60 VDC from any other terminal and chassis ground DC voltage 60 VDC max LI Keysight N6700 User s Guide 3 Getting Started Tutning the Unit 0 CP CPP o ne 46 Sele
37. lead this requires 20 AWG or heavier for a 50 foot length Note that Keysight Models N678xA SMU require remote sensing when using any of the High output bandwidth modes discussed in Chapter 4 Also these models have additional wiring restrictions as discussed under Keysight N678xA SMU Wiring Requirements CAUTION When remote sensing on power modules with the 50A sense connector do not connect the LS and LS terminals These are dedicated for local sensing only 36 Keysight N6700 User s Guide Installation 2 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 Over voltage Protection Considerations You must take into account any voltage drop in the load leads when setting the over voltage trip point This is because the OVP circuit senses at the output terminals and not at 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 Note that for Keysight Models N678xA SMU only the OVP circuit senses at
38. 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 However list data can be saved as part of a saved instrument state Refer to Instrument State Storage later in this chapter 72 Keysight N6700 User s Guide Operating the Power System 4 Program an Output Pulse or Pulse Train Step 1 Step 2 Step 3 Step 4 Keysight N6700 User s Guide The following procedure shows how to generate an output pulse train using the List function TLS Off a Pulse width gt ae List Count 1 additional pulses gt Trigger Set the voltage or current function for which you want to ge
39. no load conditions Keysight N6700 User s Guide 101 Appendix A Specifications Outline Diagram A star 3855 SERE 5355 S n 549 7 mm 560 2 mm 21 64 22 06 N6700B N6700B N6701A N6701A 598 0 mm 608 5 mm 23 54 23 96 d N6702A N6702A y o 0000 00000 0000 00000 9000 ges990 00009 00000 0000 00000 0009 00000 00009 900090 0009 00000 a O Q y y 25 4 mm 1 00 A 432 5 mm 4 17 03 la 482 6 mm gt 44 45 mm 19 00 1 75 O e tot DO e Oooo O T NN 22a EEE AIRFLOW O i J o l OO e maaa gm O e 425 45 mm gt 16 75 102 Keysight N6700 User s Guide Appendix B Using the Digital Port Digital Control PORE a ccecse tee ceicet ecctecoteget ee eetacebeatesetadetedeies 104 Configuring the Digital Control Port eeeeeeeeeteteeeeetees 105 A Digital Control Port consisting of seven 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 Bi directional Digital I O Digital Input only External Trigger Fault Output Inhibit Input Output State see Appendix D Earlier Keysight N6700A mainframes use a 4 pin connector instead of the 8 pin connector availab
40. number e g N6700B and serialnumber is the last five characters of the 10 character mainframe serial number located on the label on the top of the unit e g 45678 if the serial number is MY12345678 A N6700B 45678 is an example of a hostname Registers the hostname using the Dynamic DNS naming system Registers the hostname using the RFC NetBIOS naming protocol Domain Select Domain if your DNS server requires an instrument to register not only the hostname but also the domain name Registers the Internet domain for the instrument The Domain must start with a letter and may contain upper and lower case letters numbers dashes and dots 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 DNS Select DNS to configure the Domain Name System DNS setup of the instrument DNS is an internet service that translates domain names into IP addresses It is also needed for the instrument to find and display its hostname assigned by the network Select this item to obtain the DNS server address from DHCP You must 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 This value is the address of the DNS server It is used if you are not using DHCP or if you need to connect to a sp
41. of load lead right across the load Keysight N6700 User s Guide 37 2 Installation Parallel Connections Only connect outputs that have identical voltage and current ratings in parallel Keysight M odels N678xA SMU may be paralleled but ONLY when operated in Current Priority mode Voltage Priority operation is not allowed OUTPUT 2 Connecting outputs in parallel provides a greater current capability than can be obt The follow ained from a single output ng figures show how to connect two outputs in parallel The figure on the left illustrates local sensing If voltage drop in the load leads is a c oncern the figure on the right shows how to connect the sense leads directly at the load Note that in both cases the remote sense term OU TPUT 1 SENSE JUMPERS INSTALLED OUTPUT 3 TWIST LEADS S x LOAD WITH LOCAL SENSING S LS LS S SENSE JUMPERS INSTALLED inals must be connected OUTPUT 2 OUTPUT 1 WITH REMOTE SENSING The following figure shows the connections for 50A power modules OUTPUT 1 S LS LS S
42. on state RST RCLO 14 Keysight N6700 User s Guide Menu Command Quick Reference 1 Control Description System 10 LAN ActiveSettings Displays the LAN interface settings that are presently active Config IP Configures the IP addressing of the instrument Name Configures the Dynamic DNS and NetBIOS naming service Domain Configures the Domain Name DNS Configures the DNS server TCP Configures the TCP keepalive function Reset Resets the LAN interface settings to the factory shipped state USB Status Displays status speed packets received and packets sent Identification USB connect string the instrument s unique USB identifier GPIB Selects the GPIB address DigPort Pins lt 1 gt Function Specifies the pin function DigIn DiglO Trigin TrigOut FaultOut Pins lt 2 gt Function Specifies the pin function DigIn DiglO Trigin TrigOut Pins lt 3 gt Function Specifies the pin function DigIn DiglO Trigin TrigOut InhibitIn Pins lt 4 7 gt Function Specifies the pin function DigIn DiglO Trigln TrigOut OnC OffC Pins lt 1 7 gt Polarity Specifies the pin polarity Positive Negative Data Sends reads data from the digital 1 0 port Groups Defines groups of output channels that are connected in parallel Preferences Display Contrast Configures the display contrast Saver Configures the screen saver and wake on 1 0 timer
43. 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 For a complete description of the electrical characteristics of the digital port see Appendix A 104 Keysight N6700 User s Guide Using the Digital Port Appendix B Configuring the Digital Control Port Bi directional Digital I O 123 45 6724 Each of the seven pins can be configured as general purpose bi directional digital inputs and outputs The polarity of the pins can also be configured Pin 8 is the signal common for the digital I O pins Data is programmed according to the following bit assignments Pin 7 6 5 4 3 2 1 Bit weight 6 5 4 3 2 1 0 msb Isb To configure the pins for digital 1 0 Front Panel SCPI Command Select System IO DigPort Pins To configure the pin function Select a pin in the Pin field DIG PIN lt 1 7 gt FUNC DIO In the Function field select Dig I O To configure pin polarity In the Polarity field select either DIGYRINS ee Positive or Negative lt pol gt To send data to the pins select de ee N System IO DigPort Data i Select the Data Out field and enter the binary word The digital I O 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 interfa
44. 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 Connect the unit for remote sensing by first disconnecting the straps between sense and load terminals Make your connections as shown in the following figure Connect the load to the output terminals using separate connecting wires Keep the wire pair as short as possible and twist or bundle it to reduce lead inductance and noise pickup Keep load leads under 14 7 meters 50 feet per lead because of inductance effects 50A CONNECTOR 12A 8 20 A CONNECTOR 8A CONNECTOR G 8 G S 50A SENSE S LS LS S TWIST LEADS Connect the sense leads as close to the load as possible Do NOT bundle the sense wire pair together with the load leads keep the load wires and sense wires separate Note that the sense leads carry only a few milliamperes of current and can be a 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
45. settings press the Menu key then use the navigation keys to select System IO LAN Config In the Config menu you can then select from the following items IP Name Domain DNS TCP and Reset Note that the Reset command resets the LAN settings to the factory shipped state IP Select IP to configure the addressing of the instrument The configurable parameters include This parameter automatically configures the addressing of the instrument When selected the instrument will first try to obtain an IP address from a DHCP server If a DHCP server is found the DHCP server will assign an IP address Subnet Mask and Default Gateway to the instrument If a DHCP server is unavailable the instrument will try to obtain an IP address using AutolP AutolP automatically assigns an IP address Subnet Mask and Default Gateway addresses on networks that do not have a DHCP server This parameter allows you to manually configure the addressing of the instrument by entering values in the following three fields These fields only appear when Manual is selected This value is the Internet Protocol IP address of the instrument An IP address is required for all IP and TCP IP communications with the instrument An IP Address consists of 4 decimal numbers separated by periods Each decimal number ranges from O through 255 This value is used to enable the instrument to determine if a client IP address is on the same local subnet When a clien
46. should not be used with grouped channels otherwise a measurement overload error will occur Low current output ranges however can be used Over current protection delay has a slightly slower response time 10 ms and slightly less resolution than an ungrouped channel When output channels have been grouped they are addressed using the channel number of the lowest channel in the group Power limiting should not be used when Keysight N673xB N674xB and N677xA power modules are grouped Refer to Appendix C Front Panel SCPI Command Select System Groups To configure a group of channels In the matrix that appears SYST GRO DEF 2 3 4 select the channels you want This groups channels 2 through 4 To to group Each row defines a address the group use channel 2 separate group To return grouped channels back to an ungrouped state first remove the parallel connections between channels and proceed as follows Front Panel SCPI Command Select System Groups To ungroup all channels In the matrix place each Sao enc meee output channel in its own separate group Reboot the unit for the changes to take effect Front Panel SCPI Command Cycle AC power SYST REB 96 Keysight N6700 User s Guide Operating the Power System 4 Front Panel Keys Keysight N6700 User s Guide Lockout You can lock the front panel keys to prevent unwanted control of the instrument from the front panel This is the mos
47. the 4 wire sense terminals rather than at the output terminals This allows for more precise overvoltage monitoring directly at the load Since incorrect sense terminal wiring could defeat this feature there is also a backup local OVP function The local OVP function tracks the programmed OVP setting and trips if the voltage at the and output terminals rises more than 1 5 V above the programmed OVP setting The local OVP also trips if the voltage at the and output terminals exceeds 7 5 V on the 6 V range and 21 5 V on the 20 V range Output Noise Considerations 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 pickup 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 documented in the Keysight N6700 Modular Power System Family Specifications Guide 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 tantalum capacitor with an approximate value of 10 uF per foot 30 5 cm
48. to Then select either Rectangular Hanning for output 1 use or Hanning and press Select SENS WIND HANN 1 Send the Measurement Command The following commands trigger and return measurement data Front Panel SCPI Command Select the Meter key Front To measure average voltage amp panel meters can only measure current average voltage and current MEAS VOLT 1 MEAS CURR 1 To measure RMS voltage amp current MEAS VOLT ACDC 1 MEAS CURR ACDC 1 81 4 Operating the Power System 82 Front Panel SCPI Command Not Available To measure the high level of a pulse EAS VOLT HIGH 1 EAS CURR HIGH 1 To measure the low level of a pulse EAS VOLT LOW 1 EAS CURR LOW 1 measure the maximum value EAS VOLT MAX 1 EAS CURR MAX 1 To measure the minimum value EAS VOLT MIN 1 EAS CURR MIN 1 o measure power EAS POW 1 o o o Power can only be measured on power modules with simultaneous measurement capability see chapter 1 Model Differences Array queries return all values in the voltage and current measurement buffer No averaging is applied only raw data is returned from the buffer Front Panel SCPI Command Not Available MEAS ARR VOLT 1 MEAS ARR POW 1 MEAS ARR CURR 1 Retrieve array data Once a measurement finishes you may wish to retrieve the ar
49. 020 30 40 50 60 70 80 9 a milisecones nternal delay offset programmed turn on delay Keysight N6700 User s Guide Output On Off Synchronization Appendix D To synchronize power modules with different minimum delay offsets as shown above you can specify a common delay offset parameter By setting the common delay offset to be greater than or equal to the largest minimum delay offset you can synchronize the programmed turn on delays as shown in the following example N6731B w relays 1 60 10 N6751A 2 60 20 N6751A w relays 3 60 30 N6761A 4 60 40 A 10 20 30 40 50 60 70 80 90 100 seconds on 60 ms common delay offset Since there will be an additional delay due to the common delay offset you will need to account for the additional delay time As shown in the previous example if you program a common delay of 60 ms and user programmed delays of 10 ms 20 ms 30 ms and 40 ms for output channels 1 through 4 the actual output delays from the on event will be 70 ms 80 ms 90 ms and 100 ms respectively Even though this 60 ms delay offset will be seen on all outputs the additional delay time will not affect most applications because the relative delay times between output module turn on will still be 10 ms 20 ms 30 ms and 40 ms the exact values originally specified Ifyou have previously characterized the minimum turn on del
50. 24 nspecting the AA 25 nstalling the Unit st ct ctesctetatatecaceactcaetateidccantaidsataaidcetecctaietaire diene 26 Connecting the Line Cord ecececceceeseececeeceeceeceesteetesteeteseeseeeeees 30 Connecting the OUtOUtS eececeeeceeceseeeeeeseeeeceseeeneteseeeserseneeateas 31 Remote Sense Connections issoria iia 36 Parallel COMME ac 38 Series co 40 Additional Load Considerations oooconccoocnnocnnooncoonnnonnnonnnonnnconnnonnno 42 Connecting the Auxiliary Voltage Measurement Input 44 This chapter describes how to install your power system It discusses rack mounting and line cord connections This chapter also 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 describes various loads configurations and how to connect the output terminals in series and parallel 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 Keysight Sales and Support Office 2 Installation General Information Models Keysight Model Description N6700B N6701A N6702A 400 W 600 W 1200W MPS Mainframe without power modules N6710B N6711A N6712A Build to order Modular Power System mainframe with installed power modules N6731B N6741B 50 W 100 W 5V DC Pow
51. 240 VDC from chassis ground CAUTION Only connect outputs that have identical voltage and current ratings in OUTPUT 2 S S series Keysight Models N678xA SMU and N6783A x cannot be connected in series To prevent currents from damaging the power system when the load is connected always turn series connected outputs on and off together Do not leave one output on while the other is off 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 outputs connected in series must have equivalent current ratings The following figures show how to connect two outputs in series to a single load If voltage drop in the load leads is a concern connect the sense leads of output 1 and output 2 for remote sensing as shown in the figure on the right Note that the sense lead of output 1 must remain connected to the sense terminal of output 2 OUTPUT 1 OUTPUT 2 OUTPUT 1 S S S gt S S gt S DH AJO ORHAARO SkERRRO Anuario SENSE JUMPER SENSE SENSE INSTALLED JUMPERS JUMPERS INSTALLED INSTALLED TWIST LEADS TWIST LEADS a LOAD LOAD WITH LOCAL SENSING WITH REMOTE
52. 4 Operating the Power System Front Panel Display 98 Screen Saver The power system has a front panel screen saver that significantly increases the life of the LCD display by turning it off during periods of inactivity The delay can be set from 30 to 999 minutes in 1 minute increments As shipped from the factory the screen saver comes on one hour after activity on the front panel or interface has ceased 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 f the Wake on 1 0 function is selected the display is restored whenever there is activity on the remote interface This also resets the timer on the screen saver As shipped Wake on I O is active Front Panel SCPI Command Select System Preferences Display Saver Not Available Enable or disable the screen saver by checking or unchecking 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 I O to activate the display with 1 0 bus activity 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
53. 58 ms Current priority without relays 23 ms Current priority with relay option 760 45 ms N6781A N6782A N6784A Voltage Priority Low Z mode Current Priority 25 6 ms Voltage Priority High Z mode 24 8 ms With relays always closed Voltage Priority Low Z mode Current Priority 5 2 ms Voltage Priority High Z mode 7 3 ms N6785A N6786A Voltage Priority Low Z mode Current Priority 35 9 ms Voltage Priority High Z mode 34 9 ms With relays always closed Voltage Priority Low Z mode Current Priority 5 2 ms Voltage Priority High Z mode 7 3 ms To determine which power modules are installed in your mainframe select System About Module from the front panel This identifies the power module and the installed options If N676xA power modules are installed send the OUTP PMODE query to determine if Current priority mode has been set To determine the actual turn on delay between the on event such as pressing the Output On key or sending an Output On command you must add the programmed turn on delay to the minimum delay offset as shown in the following example In this example if you program delay values of 10 ms 20 ms 30 ms and 40 ms for output channels 1 through 4 respectively the actual output delays will be 68 ms 45 ms 81 ms and 72 ms for output channels 1 through 4 N6731B w relays 1 58 10 N6751A 2 25 20 N6751A wirelays 3 51 30 N6761A 4 32 40 a A 1
54. 6 6 0 0051 39 2 19 6 9 8 3 9 6 37 6 33 2 0 0034 58 29 14 7 5 9 10 59 2 52 3 0 0020 102 51 25 10 3 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 x indicates wire is not rated for the maximum output current of the power module 5 Because of wire inductance considerations it is also recommended that you keep your load leads twisted tie wrapped or bundled together and less than 50 feet 14 7 meters in length per lead 32 Keysight N6700 User s Guide Installation 2 Keysight N678xA SMU Wiring Requirements Because of the effect of wire inductance the wire length information given in the previous table does not apply to Keysight Models N678xA SMU To minimize the effect of wire inductance the following table describes the allowable load lead and wire length for several common output wire types Using longer or shorter wire lengths than those indicated in the table may cause output oscillation To module connector Cable Type Length in Length in feet meters Twisted pair AWG 14 or 1to 4 25ft 0 3 to1 3m smaller 50 ohm coaxial RG 58 2 to 10 ft 0 6 to 3m 10 ohm coaxial inductance per 8 5 to 33 ft 2to 10m cable foot lt 32 nH High Bandwidth Modes with Remote Sensing The fol
55. 700 Programmer s Reference Help file for more information Unless INITiate CONTinuous TRANsient is programmed it will be necessary to initiate the transient trigger system each time a triggered action is desired Trigger the Output 70 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 Select Trigger to generate an on channel 1 immediate trigger signal TRIG TRAN 1 regardless of the trigger source Alternatively if the trigger source setting 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 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 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 Transient Control ABOR TRAN 1 Scroll to and select Abort 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 You can test the TRAN_active
56. E ih eee 13 D DAME Me el sce tartans tenet hed ered MN 25 data SOCKEL chien EAH ALR nico Ra Alek 58 A rete terre rere terre rer reer etre 58 Declaration of conformity sassen 2 default GATEWAY cidcid ltd 55 digital 1 0 CONMOUNING iso sia 105 CONNECUO Sirocco 105 digital input COMIQUIANO Mace ae selina irene 106 COMNECUON Saa Ron 106 digitizer programmiNgi titi aa 79 GUIMMERMSIOMS ieiet besiitos 102 GOWNPrOGraMMING cee eee eee 121 E environmental CONAIIONS ooo 26 a EEE E A ulus A E EN S 12 49 external data LOGGING ie reni inona 90 IME a bas 92 NN Sen a a Sa a ale 93 sample meral wwii eden ies 91 terminate eane rere rere 93 EG ger SQUICE eii tisdale ES 92 external trigger CONG WING vitesse lite ete ale 106 CONNEC ONS vate Geen a 106 F fault output CONTIGUA Quai aci Seite 107 CONMECUONS te tes heed ene cia 107 TELECO ac unore ear rererrer rere reetre 30 TELE COMMANCS oh tee teeta toutes 77 TEQGUENCY 400 Hiatt 29 front panel CONUAST tastiest aia cad 97 Aispl einser deetonkd det adnehns 12 ROWS oo i me a tea at ace ou th ca i 13 Ocio 96 MENUS aaa oia 14 Sres O aaa 97 VIEW errata alocado ea enterito thts duce 2 97 front panel menu AIN cab 49 Appendix E Source Operating Modes BOOKS Ss aise a eer ott eats 50 ground CAC eats e E a E a oe 26 CA O 29 groups chal e e O ets Ge 95 rt cet E Meh wea te Osa AS pee 12 guard CONNECHIONS hiciste 34 H Hana ida 81 EE 48 49
57. ENS FUNC CURR ON 1 Initiate and trigger the measurement system INIT ACQ 1 TRIG ACQ 1 Fetch the voltage and current measurement FETC VOLT 1 FETC CURR 1 Auxiliary Voltage Measurements Keysight Models N6781A and N6785A have an auxiliary voltage measurement input whose primary use is for battery voltage rundown measurements It may also be suitable for other applications including general purpose DC voltage measurements between 20 VDC The auxiliary voltage measurement input is isolated from other commons It has a bandwidth of about 2 kHz It has one input range 20 to 20 VDC Auxiliary voltage measurements cannot be made along with output voltage measurements When the auxiliary voltage measurement input is selected the voltage measurement input will be switched to the Aux Voltage inputs instead of the normal and sense terminals To enable auxiliary voltage measurements Front Panel SCPI Command Select Measure Input To enable auxiliary measurements Select Auxiliary and press Select SENS FUNC VOLT INP AUX 1 Select Main to reconnect the Take the auxiliary voltage voltage measurement input to measurement the output terminals MEAS VOLT 1 When the auxiliary voltage measurement terminals are left unconnected the front panel meter will indicate a voltage reading of approximately 1 6V This is a normal indication which does not affect the voltage measurement once the au
58. INH CEN A OA 7 L 123 45 674 1 23 45 674 al a al j Panic A 3 INH switch Input o Oo INH Common As shown in the figure when the Fault outputs and Inhibit inputs of several mainframes are daisy chained an internal fault condition in one of the mainframes will disable all of them without intervention by either the controller or external circuitry You can also connect the Inhibit input to a manual switch or external control signal that will short the Inhibit pin to common whenever it is necessary to disable all output channels in the mainframe Negative polarity must be programmed for all pins in this case You can also use the Fault output to drive an external relay circuit or signal other devices whenever a user definable fault occurs Clearing a System Protection Fault To restore all instruments to a normal operating condition when a fault condition occurs in a daisy chained system protection configuration two fault conditions must be removed 1 The initial protection fault or external Inhibit signal
59. Keysight N678xA SMU power modules 5 12 us sample for one parameter 10 24 us sample for two parameters System Features Choice of three GPIB IEEE 488 LAN and USB remote programming interfaces are built in interfaces Built in Web server A built in Web server lets you control the instrument directly from an internet browser on your computer SCPI language The instrument is compatible with the Standard Commands for Programmable Instruments SCPI Front panel I O setup Menus let you set up GPIB and LAN parameters from the front panel Real time status The front panel indicates the status of each output It also indicates when a information protection shut down has occurred Module identification Each module has identifying data stored in non volatile memory Information includes model number serial number and options Universal AC input Mainframes have universal input voltage capability with active power factor correction Keysight N6700 User s Guide 9 1 Quick Reference Model Differences Feature DC Power High Performance Precision e available N673xB N674xB N677xA N675xA N676xA 50 W output rating N6731B N6736B N6751A N6761A 100 W output rating N6741B N6746B N6752A N6762A 300 W output rating N6773A N6777A N6753A N6754A N6763A N6764A 500 W output rating N6755A N6756A N6765A N6766A Output disconnect relays Option 761 Option 761 Option 761 Output disconnect polarity reversal rel
60. Keysight Series N6700 Low Profile Modular Power System User s Guide KEYSIGHT TECHNOLOGIES Legal Notices Keysight Technologies 2006 2015 No part of this document may be photocopied reproduced or translated to another language without the prior agreement and written consent of Keysight Technologies as governed by United States and international copyright laws Warranty 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 Keysight 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 Keysight 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 Keysight 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 2937 Edition 8 January 2015 Printed in Malaysia Reprints of this manual containing minor corrections and updates may have the same printing date Revised editions are identi
61. MPERS LEADS l UU SENSE TWIST JUMPERS LEADS INSTALLED FOR LOCAL De ba SENSING LOAD LOAD LOAD LOAD This minimizes mutual coupling effects and takes full advantage of the power system s low output impedance Keep each pair of wires as short as possible and twist or bundle them to reduce lead inductance and noise pickup Note that Keysight Models N678xA SMU have additional wiring restrictions as discussed under Keysight N678xA SMU Wiring Requirements If load considerations require the use of distribution terminals that are located away from the instrument connect the output 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 Keysight N6700 User s Guide 35 2 Installation Remote Sense Connections SHOCK HAZARD Turn off AC power before making or changing rear WARNING panel connections Remote sensing improves 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
62. Measure Units SMU have a multiple quadrant power mesh with separate voltage and current priority source modes These models are optimized for applications such as battery drain analysis and functional testing The N6783A Application Specific DC Power Modules are two quadrant low wattage models specifically designed for battery charging discharging and mobile communications applications 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 Full programming capability is provided for the entire range of output and current Low output noise Fast up down programming voltage and current Outputs can operate as either constant voltage CV or constant current CC sources Available on Keysight N676xA and N675xA power modules Output noise is lt 4 5 mV peak to peak which is comparable to linear supplies Available on Keysight N675xA N676xA and N678xA SMU power modules lt 1 5 millisecond response time from 10 to 90 of the output rating Fast transient response Available on Keysight N675xA N676xA and N678xA SMU power modules Transient response is less than 100 us Keysight N6700 User s Guide Quick Reference 1 Output autoranging Available on Keysight N676xA and N675xA power modules
63. Note that this command briefly turns the output off while the output and sense terminal polarities are switched Also note that if this option is installed in Model N6742B the maximum output current will be limited to 10A Front Panel SCPI Command Select Output Advanced Pol To switch the output and sense Then check the Reverse box terminal polarities of output 1 Uncheck the Reverse box to OUTP REL POL REV 1 return the polarity to normal To return the polarities back to normal OUTP REL POL NORM 1 When the output polarity has been reversed the voltage meter on the front panel display will show a bar over the voltage t000 V Set the Output Resistance This information applies to Keysight Models N6781A and N6785A only Output resistance programming is primarily used in battery testing applications and only applies in Voltage priority mode Values are programmed in Ohms from 40 mO to 1 Q Front Panel SCPI Command Select To set the output resistance to 0 5 Q OutputAdvanced Resistance OUTP RES 0 5 1 Enter a value and press Select Set the Output Bandwidth This information applies to Keysight Models N678xA SMU only 66 Keysight Models N678xA SMU have several voltage bandwidth modes to allow you to optimize output response time with capacitive loads The Low bandwidth setting provides stability with a wide range of output capacitors Additional bandwidth modes provi
64. 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 Keysight 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 unit 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
65. POL Positive or Negative To read the pin data To read the data from the pins Bie DATA select System lO DigPort Data The input data is displayed as a binary number in the Data In field External Trigger 106 Each of the seven 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 Pin 8 is the signal common for the trigger pins When configured as a trigger input you can apply either a negative going or a positive going pulse to the designated trigger input pin The trigger latency is 5 microseconds The minimum pulse width is 4 microseconds for positive going signals and 10 microseconds for negative going signals 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 10 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 Front Panel SCPI Command Select SystemWOWDigPortWPins To select the trigger output Select a pin in the Pin field function for pin 1 In the Function field select either DIG PIN1 FUNC TOUT Trig In or Trig Out To select the trigger input In the Polarity field select either function for pin 2 Positive or
66. PROTection CLEar chanlist COUPle lt Bool gt DELay lt NRf gt chanlist 0SCillation lt Bool gt chanlist WDOG STATe lt Bool gt DELay lt NRf gt RELay POLarity NORMal REVerse chanlist SENSe CURRent CCOMpensate lt Bool gt chanlist DC RANGe UPPer lt NRf gt chanlist AUTO lt Bool gt chanlist ELOG CURRent DC RANGe UPPer lt NRf gt chanlist AUTO lt Bool gt chanlist FUNCtion CURRent lt Bool gt chanlist MINMax lt Bool gt chanlist VOLTage lt Bool gt chanlist MINMax lt Bool gt chanlist PERiod lt NR1 gt chanlist VOLTage DC RANGe UPPer lt NRf gt chanlist AUTO lt Bool gt chanlist FUNCtion VOLTage CURRent NONE chanlist CURRent lt Bool gt chanlist VOLTage lt Bool gt chanlist INPut MAIN AUXiliary chanlist SWEep OFFSet POINts lt NRf gt chanlist POINts lt NRf gt chanlist TINTerval lt NRf gt chanlist RESolution RES20 RES40 chanlist VOLTage DC RANGe UPPer lt NRf gt chanlist AUTO lt Bool gt chanlist WINDow TYPE HANNing RECTangular chanlist SOURce CURRent LEVel IMMediatel AMPLitude lt NRf gt chanlist TRIGgered AMPLitude lt NRf gt chanlist LIMit POSitive IMMediate AMPLitude lt NRf gt chanlist COUPle lt Bool gt chanlist NEGative IMMe
67. RMOM E A 59 PEMOLE SENSING tit rs 36 reset static lies 22 A E 66 S A 3 O 26 A tae nt wilde lang 26 sample Intervalos esti cea o ssl 80 91 SCPI COMMON COMMANA Siinain asita aian 21 subsystem COMMANAS eiiiai 16 SCIEEN SAVE aima aitat eaen atea 97 Keysight N6700 User s Guide Source Operating Modes Appendix E deidad 94 sense leads OPEN eeceeeececeseceeeeeeteeeeteeeetteenees 37 sensitiva dal iia cta n ARAE 42 SOCKETS etheet antadetetatdevtvaabtieth tenet 58 specifications characterises atari tee malate 99 OT a l 58 Step PKOGTAMMING 2 uenia aA 68 Storing States iaieiiea a 94 s bnet maskiran anea N 54 55 Support ral a A AS 28 switching transients iriko srana aioa 42 synchronizing measurements coccion 83 SYSTEM TEALULES canes tate AA 9 system protection ClEANING ER A E A E 108 CONMECUONS sestiana aa S 108 T TENET aea a ea nee eer renee e ea rey 58 LOST OXTENSIONS anie NAAN 72 79 transient trigge en iei arae Series 71 OOT state aA AEI 67 t r oN deliyi nsere tananan 65 U UNT UPA 95 UNR ninaona a a a 13 o AT 6 USB INTE a aL de 51 V voltage measurement ranges niarit enta taisot 77 priority Mode ato 63 returning voltage dataen ee 82 Sica 46 62 Sl Wire tatiana 64 voltage pOr it dd 122 W Wario iiainiates Sates 3 WALCNOOG IME caiit ieteka 88 VWERISCIVED Aa ae dither oie 57 Web UR Scar ln 4 WITESIZ S008 satiated ata aii aaa 32 127 This information is subject to change without notice Keysight Techn
68. UEStionable EVENt chanlist CONDition chanlist ENABle lt NRf gt chanlist NTRansition lt NRf gt chanlist PTRansition lt NRf gt chanlist Description Sets the positive voltage limit only on N678xA SMU Sets the voltage limit tracking state only on N6784A Sets the negative voltage limit only on N6784A Sets the voltage trigger mode Sets the over voltage protection level Sets the over voltage protection delay only on N6783A Sets the positive remote OV protection level only on N678xA SMU Sets the negative remote OV protection level only on N6784A Tracking commands only on Option J01 Enables disables tracking OVP Sets the tracking OVP offset Sets the output voltage range Sets the output voltage slew rate Enables disables the maximum slew rate override 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 SYSTem CHANnel COUNt Returns the number of output channels in a mainframe MODel chanlist Returns the model number of the sele
69. WE OFFS POIN 100 1 When the value is O all values are taken after the trigger Values greater than O 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 Negative values let you acquire samples prior to the trigger f 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 Select the Measurement Trigger Source An immediate trigger command over the bus will generate an immediate trigger regardless of the trigger source Bus External Pin lt n gt Transient lt n gt Unless you are using a TRIGger ACQuire command to trigger the measurement select a trigger source from the following Selects GPIB device trigger TRG or lt GET gt Group Execute Trigger Selects any pin configured as a trigger input as the trigger source Selects a pin on the external port connector as the trigger source lt n gt specifies the pin number The selected pin must be configured as a Trigger Input in order to be used as a trigger source see Appendix B Selects the output channel s transient system as the trigger source lt n gt specifies the channel When you select a channel you must also set up that channel s transient system to genera
70. a minimum of 102 4 microseconds to a maximum of 60 seconds Front Panel SCPI Command Not Available To set an integration period of 600 microseconds SENS ELOG PER 600E 6 1 During the integration period data log samples are averaged and the minimum and maximum values are tracked At the end of each integration period the average minimum and maximum values are added to the internal FIFO buffer Although the absolute minimum integration period is 102 4 microseconds the actual minimum varies as a function of the number of parameters that are being logged The actual minimum is 102 4 microseconds times the number of parameters being logged at each interval Note that you can measure up to 4 parameters with the time interval resolution set to 20 microseconds and up t o 8 parameters with the resolution set to 40 microseconds Keysight N6700 User s Guide Operating the Power System 4 102 4 microseconds 1 parameter voltage or current 204 8 microseconds 2 parameters voltage current 409 6 microseconds 4 parameters voltage min max current with 20 us time interval resolution 409 6 microseconds Up to 8 parameters with 40 us time interval resolution You can change the time interval resolution as follows Front Panel SCPI Command Not Available To set the resolution to 20 microseconds SENS SWE TINT RES RES20 1 To set the resolution to 40 microseconds SENS SWE TINT RES RES40 1
71. annel uncheck the box 3 Specify the Turn On Delays for each Output Channel Turn on delays can be specified for all coupled output channels Any delay sequence can be implemented There are no restrictions on what the sequence is or what channel comes up first Front Panel SCPI Command For channels 1 2 3 and 4 Program a turn on delays for select Output Sequence Delay channels 1 through 4 Specify the Turn on delay for OUTP DEL RISE 01 1 each channel in seconds then OUTP DEL RISe 02 2 press Select OUTP DEL RISE 03 3 OUTP DEL RISE 04 4 4 Specify the Common Delay Offset Specifying a common delay offset assures that the user programmed turn on delays will be synchronized to start at the completion of the common delay offset Select the delay offset of the slowest power module in the mainframe and use that as the common delay offset Front Panel SCPI Command n the front panel menu select To query the delay offset of the Output Sequence Couple slowest power module in the The Max delay offset for this frame mainframe the maximum delay field displays the delay offset of offset in seconds the slowest power module in the OUTP COUP MAX DOFE frame Enter the delay offset value To specify the common delay of the slowest power module in offset for the mainframe in the Delay offset field in seconds milliseconds then press Select OUTP COUP DOFF
72. ate as follows Front Panel SCPI Command Select Measure Sweep To set the time interval to 60us Enter the number of points and with 4096 samples use press Select Scroll to Time SENS SWE TINT 60E 6 1 Interval enter a value and press SENS SWE POIN 4096 1 Select The maximum number of sample points that are available for all measurements is 512 K points K 1024 If you specify a voltage measurement with 500 K points on channel 1 for example you will only have 12 K points available for all other measurements Time interval values can range from 5 12 microseconds for one parameter on Models N678xA SMU to 40 000 seconds Note that the shortest time interval fastest speed that can be specified depends on the number of parameters that are being measured the model that is doing the measuring and the time interval resolution 5 12 microseconds 1 parameter models N678xA SMU only 10 24 microseconds 1 or 2 parameters all models 20 48 microseconds 3 or 4 parameters all models with 20 us resolution 20 48 microseconds Up to 8 parameters all models with 40 us resolution Keysight N6700 User s Guide Keysight N6700 User s Guide Operating the Power System 4 Time interval values from 10 24 up to 20 48 microseconds are rounded to the nearest 10 24 microsecond increment Values above 20 48 microseconds are rounded to the nearest 20 48 microsecond increment when the resolution is set to
73. ays NOTE Option 760 Option 760 Option 760 Autoranging output capability Voltage or current turn on priority N6761A N6762A Precision voltage and current measurements Low voltage and low current output range N6761A N6762A Low voltage and low current measurement range 200 microampere measurement range NOTE Option 2UA Simultaneous voltage and current measurements SCPI command output list capability NOTES Option 054 Option 054 SCPI command array readback NOTES Option 054 Option 054 SCPI command programmable sample rate NOTES Option 054 Option 054 SCPI command external data logging NES Option 054 Option 054 Double wide occupies 2 channel locations Feature e available Output rating 20 W 2 quadrant operation 4 quadrant operation Auxiliary voltage measurement input Output disconnect relays egative voltage protection Voltage or current priority mode Programmable output resistance tiple voltage output ranges tiple current output ranges tiple voltage measurement ranges tiple current measurement ranges Simultaneous voltage and current measurements CHS a ie e UUU e o o Seamless measurement autoranging SCPI command output list capability NOTES 4 SCPI command array readback NOTES SCPI command programmable sample rate NOTES SCPI command external data logging N91E Double wide occupies 2 channel locations Source Measure Units SMU N6781A N6782A N6784A N6785A N6786A
74. ays of the power modules that you are synchronizing and have incorporated this delay in your application program you do not need to rewrite your test program Your application will continue to work as before Procedure Keysight N6700 User s Guide To configure the output turn on delays 1 Enable the turn on synchronization function on the mainframe 2 Specify the output channels that will be synchronized or coupled 3 Specify the user programmed turn on delay for each output channel that will be synchronized 4 This step is required if you have power modules with different minimum delay offsets Specify a common delay offset for all of the synchronized output channels When the common delay offset completes the user programmed turn on delays will start 1 Enable the Synchronization Function Output turn on synchronization must be enabled on the mainframe Front Panel SCPI Command In the front panel menu select To enable send Output Sequence Couple OUTP COUP ON Check the box labeled Enable To disable send To disable uncheck the box OUTP COUP OFF 115 Appendix D Output On Off Synchronization 116 2 Specify which Output Channels will be Synchronized Select the output channels that will be synchronized Front Panel SCPI Command In the front panel menu select To specify a channel or Output Sequence Couple channels Check which channels will be coupled OUTP COUP CHAN 1 2 3 4 To remove a ch
75. be overwritten Front Panel SCPI Command Select States SaveRecall To save a state SAV lt n gt In the SaveRecall field enter a location from O to 1 and press TO recall a state Select Select Save to save the id state or Recall to recall a state 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 O at power on Front Panel SCPI Command Select States PowerOn OUTP PON STAT RCLO Select Recall State 0 then press Select Keysight N6700 User s Guide 95 4 Operating the Power System Output Groups Output grouping does not apply to Keysight Models N678xA SMU Output channels can be configured or grouped to create a single output with higher current and power capability Almost all instrument functionality is supported by grouped channels including voltage and current programming measurements status step and list transients The following conditions apply Up to four output channels can be grouped per mainframe Output channels that are grouped must also be connected in parallel as described in Chapter 2 Grouped channels do not have to be adjacent but they must have identical model numbers and options installed The maximum output current is the sum of the maximum of each channel in the group Low current measurement ranges
76. be used to communicate with your power system You can also communicate with your power system using its built in Web server the Telnet utility or sockets These latter methods are a convenient way to communicate with the power system without using I O libraries or drivers In all cases you must first establish a LAN connection from your computer to the power system as previously discussed Using the Web Server Your power system has a built in Web server that lets you control it directly from an internet browser on your computer With the Web server you can access the front panel control functions including the LAN configuration parameters Up to two simultaneous connections are allowed With additional connections performance will be reduced The built in Web server only operates over the LAN interface It requires Internet Explorer 7 or Firefox2 You also need the Java Sun Plug in This is included in the Java Runtime Environment Refer to Sun Microsystem s website If you are using Internet Explorer 7 open a separate browser window for each connection The Web server is enabled when shipped To launch the Web server 1 Open the internet browser on your computer 2 Enter the instrument s hostname or IP address into the browser s Address field to launch the Web server The following home page will appear 5 Welcome Page Keysight N6700 User s Guide KEYSIGHT TECHNOLOGIEN Modular Power System Welcome to you
77. bit in the operation status register to know when the transient trigger system has returned to the idle state Keysight N6700 User s Guide Front Panel Not Available Operating the Power System 4 SCPI Command To query the TRAN_active bit bit 6 STAT OPER COND 1 If a bit value of 64 is returned in the query the TRAN_active bit is true and the transient action is NOT complete When the TRAN_active bit is false the transient action is complete Refer to the N6700 Programmer s Reference Help file for more information Generate Trigger Out Signals 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 Keysight N6700 User s Guide an output Step occurs 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 SCPI Command To program channel 3 s step function to generate a trigger signal use STEP TOUT ON 3 71 4 Operating the Power System Programming Output Lists The Output List function described in this section is not available on all models Refer to the Test Extensions feature under Model Differences in chapter 1 The List Function Either output voltag
78. btain its address from DHCP and that NetBIOS over TCP IP is enabled Note that if the computer had been connected to a site LAN it may still retain previous network settings from the site LAN Wait one minute after disconnecting it from the site LAN before connecting it to the private LAN This allows Windows to sense that it is ona different network and restart the network configuration If you are running Windows 98 you may need to manually release the previous settings 3 The factory shipped instrument LAN settings are configured to automatically obtain an IP address from a site network using a DHCP server You can leave these settings as they are Most Keysight products and most computers will automatically choose an P address using auto IP if a DHCP server is not present Each assigns itself an IP address from the block 169 254 nnn Note that this may take up to one minute The front panel Lan indicator will come on when the LAN port has been configured Turning off DHCP reduces the time required to fully configure a network connection when the power system is turned on To manually configure the instrument LAN settings refer to Configuring the LAN Parameters later in this chapter 4 Use the Connection Expert utility of the Keysight IO Libraries Suite to add the N6700 power system and verify a connection To add the instrument you can request the Connection Expert to discover the instrument If the inst
79. can retrieve the measurement Refer to the N6700 Programmer s Reference Help file for more information Keysight N6700 User s Guide Operating the Power System 4 Using the Protection Functions OV OV OC OT OSC PF CP CP PROT INH Each output has independent protection functions A front panel status indicator will turn on when a protection function has been set Protection functions are latching which means that they must be cleared once they have been set As explained under Couple Output Protection you can configure the instrument so that when a protection fault occurs on one output ALL outputs will be turned off Of the following protection functions only OV OV OC OSC PROT and INH are user programmable Over voltage protection is a hardware OVP whose trip level is a programmable value The OVP is always enabled Negative voltage protection is a hardware OVP Only applies to Keysight N678xA SMU and N6783A Over current protection is a programmable function that can be enabled or disabled When enabled the output will be disabled when the output current teaches the current limit setting Over temperature protection monitors the temperature of each output and shuts down the output if any temperature exceeds the maximum factory defined limits Oscillation protection shuts down the output if an oscillation is detected on the output Only applies to Keysight N678xA SMU PF indicates
80. capability Autoranging supplies the maximum rated power over a continuous range of voltage and current settings Output On Off A turn on turn off delay capability for each output allows output on off sequencing sequencing Remote voltage sensing Two remote sensing terminals are provided for each output When shipped the remote sense jumpers are included in a separate bag See Chapter 2 Output protection Each output has over voltage over current and over temperature protection Over voltage and over current protection are programmable Multiple Quadrant Available on Keysight N678xA SMU and N6783A power modules operation 2 quadrant operation provides source and sink output capability Keysight model N6784A offers 4 quadrant output operation Measurement Features Multiple output Single Switch between a 4 output summary view and a 1 output detailed view of output meter display power supply information All power modules display real time output voltage and current measurements as well as status information Seamless measurement Available on Keysight N6781A N6782A N6785A and N6786A SMU power autoranging modules Output measurements seamlessly autorange between ranges however the 10 pA current range must be selected manually Microampere current Available on Keysight N6761A N6762A and N678xA SMU power modules measurements Current measurement can be made as low as 1 pA in the 10 pA range Fast digitizing Available on
81. cases these temporary conditions would not be considered an over current protection fault and having an OCP condition disable the output when the CC status bit is set would be a nuisance Specifying an OCP delay lets the OCP circuit ignore the CC status bit during the specified delay period Once the OCP delay time has expired and if the CC mode persists the output will shut down The delay can be programmed from 0 to 0 255 seconds You can specify if the OCP delay timer is started by any transition of the output into CC mode or only at the end of a settings change in voltage current or output state Front Panel SCPI Command Select Protect OCP To specify a 10 millisecond delay Enter a delay value and press Select OUTP PROT DEL 0 01 1 Check Start delay on CC to start To start the delay timer by ANY the delay timer by ANY output output transition into CC mode transition into CC mode Otherwise CURR PROT DEL STAR CCTR 1 the delay timer will only be started To start the delay timer by a settings by a settings change in voltage change in voltage current or output current or output state CURR PROT DEL STAR SCH 1 Keysight N6700 User s Guide Operating the Power System 4 Factors that influence how long the settings change or output load change may last include difference between old output value and new output value the current limit setting and the load capacitance in CV m
82. cations 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 Voltage 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 Current 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 These are twice the current programming accuracy including the percentage portion at all operating points Load Transient Load transient specifications are typically twice the single output Recovery Time Keysight N6700 User s Guide 41 2 Additional Load Considerations 42 Response Time with an External Capacitor When programming with an external capacitor voltage response time may be longer than that for purely resistive loads Use the following formula to estimate the additional up programming response time Response Time Current Limit Setting Load Current 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 estima
83. ce circuit connections using the digital I O functions 16 5 V Max 123 45 674 coll A Keysight N6700 User s Guide Current AO 0 1A Max Digital Output gt SI a Pins 1 7 1 23 45 67 L Relay driver TTL AS CMOS HC Pins 1 7 contain internal clamp diodes for AA inductive flyback Digital Input Pins 1 7 A Relay Circuits B Digital Interface Circuits 105 Appendix B_ Using the Digital Port Digital Input Each of the seven pins can be configured as digital input only The polarity of the pins can also be configured Pin 8 is the signal common for the digital input pins 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 binary output word To configure the pins for digital input only Front Panel SCPI Command Select SystemWOWDigPortWPins To configure the pin function Select a pin in the Pin field DIG PIN lt 1 7 gt FUNC DINP In the Function field select Dig In To configure pin polarity In the Polarity field select either Ree Seen S
84. cted channel OPTion chanlist Returns the option installed in the selected channel SERial chanlist Returns the serial number of the selected channel COMMunicate RLSTate LOCal REMote RWLock Specifies the Remote Local state of the instrument TCPip CONTrol Returns the control connection port number ERRor Returns the error number and error string GROup Group commands do NOT apply to N678xA SMU CATalog Returns the groups that have been defined DEFine chanlist Group multiple channels to create a single output DELete lt channel gt Removes the specified channel from a group ALL Ungroups all channels PASSword FPANel RESet Resets the front panel lock password to zero REBoot Returns the unit to its power on state VERSion Returns the SCPI version number TRIGger ACQuire Acquire commands only on N676xA N678xA SMU and Option 054 IMMediate chanlist Triggers the measurement immediately CURRent LEVel lt NRf gt chanlist Sets the current trigger level SLOPe POSitive NEGative chanlist Sets the current trigger slope 20 Keysight N6700 User s Guide Quick Reference 1 SCPI Command Description TRIGger continued SOURce BUS CURRent lt 1 4 gt EXTernal PIN lt 1 7 gt Sets the measurement trigger source TRANsient lt 1 4 gt VOLTage lt 1 4 gt chanlist TOUTput ENABle lt Bool gt chanlist Enables measurement triggers to be sent to a digital port pin VOLTage LEVel lt NRf gt chanl
85. cting an Qutput 801 1a1a PORN U UUPU0oo O PPP A 46 Entering an Output Voltage Setting wo eee eee 46 Entering a Current Limit Setting ren 47 Enabling th A tonto oats 47 Ls eet Pies Gril aries 425 c1ssanehinatantiaaatandganinandbansnaaabaatnananagans 48 Connecting to the Interfaces coin 50 Communicating Over the LAN ER 57 Securing the Interfaces eccescceceseeeceseceeeeseeeeeeeeeeeeeeeeeseeeeeetens 59 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 menu structure is found in Chapter 1 This chapter also contains information on how to configure the three remote interfaces that are provided on the back of the instrument Detailed information on configuring the remote interfaces is included in the Keysight Technologies USB LAN GPIB Interfaces Connectivity Guide which is available on the Automation Ready CD included with this product KEYSIGHT TECHNOLOGIES 3 Getting Started 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 front panel Err indicator comes on Press the Error key to display th
86. ctivity on interface Multiple channel Voltage and Current measurements view Press the Meter key 12 5237 10 234 3 000 0 000Y views O 179A 0 3414 0 200A 0 0004 The highlighted channel is the active channel Grouped channel Channels 2 through 4 are connected in parallel and have been view configured or grouped to act as a single higher power channel Refer to Chapter 4 cao cane 12 923 10 234V for more information O 179A 2 3914 Grouped channels are addressed using the channel number of the lowest channel in the group Double wide view Channel 2 is a double wide power module that occupies two channel locations in the mainframe 12 523 10 234V 0 000 0 1794 40 341A 0 000A MO E Interface status Err an error has occurred press Error key to display error message indicators Lan the LAN is connected and has been configured 10 there is activity on one of the remote interfaces Keysight N6700 User s Guide Operating status indicators Quick Reference 1 OFF the output is off CV the output is in constant voltage mode CC the output Is in constant current mode CP the output is limited or disabled by the positive power limit CP the output is limited or disabled by the negative power limit VL the output is in positive or negative voltage limit mode CL the output is in positive or negative current limit mode OV the output is disabled by the over voltage protection OV the output is disabled by
87. d Press Select 73 4 Operating the Power System Step 5 Step 6 Step 7 Step 8 Step 9 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 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 Select List Step O and check the Of 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 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 output 1 use Select Return to Start Press LIST TERM LAST 0 1 Select 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
88. de faster output response when the output capacitance is restricted to smaller values Keysight N6700 User s Guide Setting Low High High2 High3 Operating the Power System 4 If capacitive loads cause the output to oscillate on the default Low bandwidth or any of the other bandwidth settings a protection function will detect the oscillation and latch the output off The condition is annunciated by the OSC status bit At power on the oscillation protection function is enabled Select a bandwidth according to the following output capacitances and lead lengths Output Sensing Maximum distance from ESR Capacitance sense point to capacitor 100 kHz 0 150 uF Localorremote Full lead length see chapter 2 50 to 200 mQ 0 1 pF Remote only 6 inches 155 mm 50 to 200 mQ 1 7 uF Remote only 6 inches 155 mm 50 to 200 mQ 7 150 pF Remote only 6 inches 155 mm 50 to 200 mQ See Chapter 2 under Keysight N678xA SMU Wiring Requirements for additional information on allowable load lead lengths Connecting capacitive loads that fall outside the indicated ranges may result in output instability or oscillation and may cause the output to turn off setting the OSC status bit Front Panel SCPI Command Select To select the bandwidth Output Advanced Bandwidth VOLT BWID HIGH1 1 Select a bandwidth from the selections listed and press Select Set the Output Turn Off Mode Keysight N6700 User s Guide This information app
89. diatel AMPLitude lt NRf gt chanlist Description Resets latched protection Enables disables channel coupling for protection faults Sets over current protection programming delay Enables disables output oscillation protection N678xA SMU Enables disables the I O watchdog timer Sets the watchdog timer delay Sets the output relay polarity Option 760 Enables disables the capacitive current compensation Selects the current measurement range Enables disables measurement autoranging N6781A N6782A N6785A N6786A Sets the external data log current range Enables disables measurement autoranging N6781A N6782A N6785A N6786A Enables disables external current data logging Enables disables external min max current data logging Enables disables external voltage data logging Enables disables external min max voltage data logging Sets the integration time of the external data logging Sets the external data log voltage range Enables disables measurement autoranging N6781A N6782A Selects the measurement function for backward compatibility Enables disables current measurements replaces FUNCtion Enables disables voltage measurements replaces FUNCtion Selects the voltage measurement input only on N6781A N6785A Sweep commands only on N676xA N678xA SMU and Option 054 Defines the trigger offset in the measurement sweep Defines the number of data points in the measurement Sets the measurement sample interval S
90. e LXI Compliance Class C only applies to units with LXI label on front panel USB 2 0 Requires Keysight IO Library version M 01 01 or 14 0 and up 10 100 LAN Requires Keysight IO Library version L 01 01 or 14 0 and up Built in Web server Requires Internet Explorer 7 or Firefox 2 Regulatory Compliance EMC Complies with European EMC Directive for test and measurement products e IEC EN 61326 1 e CISPR 11 Group 1 class A e AS NZS CISPR 11 e ICES NMB 001 Complies with Australian standard and carries C Tick mark This ISM device complies with Canadian ICES 001 Cet appareil ISM est conforme la norme NMB 001 du Canada Safety Complies with European Low Voltage Directive and carries the CE marking Conforms to UL 61010 1 and CSA C22 2 61010 1 100 Keysight N6700 User s Guide Specifications Appendix A Supplemental Characteristics continued N6700B N6701A N6702A Environmental Conditions Operating environment Temperature range Relative humidity Altitude Storage temperature Acoustic Noise Declaration This statement is provided to comply with the requirements of the German Sound Emission Directive from 18 January 1991 Indoor use installation category II for AC input pollution degree 2 0 C to 55 C output current is derated 1 per C above 40 C ambient temperature Up to 95 Up to 2000 meters 30 C to 70 C Sound Pressure Lp lt 70 dB A At Operator Position ormal Operation
91. e list of errors on the front panel Refer to the Service Guide 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 Channel 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 a 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 o 6 O 0 0000V 0 0000A Set o ooooa Arrow Keys You can also use the arrow keys to adjust the value up or down and ay switch between and limits on Model N6784A When the 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 Voltage key to enter a value Voltage Press Voltage 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 Outputt 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 46 Keysight N6700 Us
92. e 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 GO Tr ZE 0r A 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 description gt be 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 Keysight 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 Operatin
93. e or output current or both may be list controlled For Keysight Models N678xA SMU only the parameters associated with one of the priority modes either voltage priority or current priority 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 Dwell times can be programmed from O to 262 144 seconds The default dwell time is 0 001 seconds f 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 the dwell period are ignored Voltage and current lists can also be configured to generate trigger signals at specified steps This is accomplished by two additional
94. e that the minimum wire size required to prevent overheating may not be large enough to prevent over voltage tripping or maintain good regulation Under most conditions the load wires should also be heavy enough to limit the voltage drop to no more than L 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 Load lead resistance is also 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 Wire size Current carrying capacity in Amps Resistance Max Length to Limit Voltage to 1 V Lead for stranded copper wire for5A for10A for20A for 50 A AWG 2 wires bundled 4 wires bundled Q foot Wire length in feet 20 7 8 6 9 0 0102 20 x x x 18 14 5 12 8 0 0064 30 15 x x 16 18 2 16 1 0 0040 50 25 X x 14 29 3 25 9 0 0025 80 40 20 x 12 37 6 33 2 0 0016 125 63 30 x 10 51 7 45 7 0 0010 200 100 50 20 8 70 5 62 3 0 0006 320 160 80 32 6 94 83 0 0004 504 252 126 50 Area in mm 2 wires bundled 4 wires bundled Q meter Wire length in meters 0 5 7 8 6 9 0 0401 5 X X x 0 75 9 4 8 3 0 0267 7 4 X X X 1 N27 11 2 0 0200 10 5 x x 1 5 15 0 13 3 0 0137 14 6 7 2 x X 2 5 23 5 20 8 0 0082 24 4 12 2 6 1 x 4 30 1 2
95. e web site Refer to Instrument Identification in chapter 4 to view the firmware version that is currently installed in your mainframe Updated versions of this manual are also posted on the web Go to http www keysight com find N6 700 to get the latest version of the manual Keysight N6700 User s Guide 1 Quick Reference The Keysight N6700 Modular Power System At a Glance 8 The Front Panel At a Glance concoccncnnonnccnnoncicncnnccnnnancnnnnncnnnnnnns 11 The Rear Panel At a Glance oo eee ceceeeceeceteeceeeteeeeeeeeeeeeeeeeeenens 11 Front Panel Display At a Glance ooccccccicnicnocnonconnoncnnnoncnnconcnncnno 12 Front Panel Keys At a Glance concooconconconccoconncononncnnonncnnonncnncnncnno 13 Front Panel Menu Reference eccecceeceeceeeseeceeeeeeseeereneeeneeeaeeaes 14 gt CPC SUMMAT RARA 16 This chapter concisely describes the operation of the Keysight 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 For complete details on the SCPI Standard Commands for Programmable Instruments commands refer to the Programmer s Reference Help file included on the Keysight N6700 Product Reference CD This CD ROM is shipped along with your instrument Unless otherwise noted t
96. ecific DNS server 55 3 Getting Started For improved performance when connected to an isolated subnet select Use the following DNS server However leave the DNS server address field blank 56 Enable TCP Keepalive TCP keepalive timeout TCP Select TCP to configure the TCP keepalive settings of the instrument Check the Enable box to enable the TCP keepalive function The instrument uses the TCP keepalive timer 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 If not the connection will be marked as down or dropped The instrument will release any resources that were allocated to that client This is the delay in seconds before TCP keepalive probes will be sent to the client It is recommended that the largest value be used that still meets the application s need for unreachable client detection Smaller keepalive time out values will generate more keepalive probes network traffic using more of the available network bandwidth Allowed values 720 99999 seconds Reset Resets the LAN settings to the factory shipped state These settings are listed at the end of this chapter Keysight N6700 User s Guide Getting Started 3 Communicating Over the LAN The Keysight IO Libraries Suite along with instrument drivers for specific programming environments can
97. ector plug 12 A Output Connector plug 20 A Output Connector plug 50 A Output Connector plug AUX Measurement connector plug Small Sense Jumpers Large Sense Jumpers Sense Connector Module Cal Certificate One 8 A 8 pin connector plug for connecting power and sense leads Only used in N678xA SMU One 12 A 4 pin connector plug for connecting power and sense leads Used in all except N6731B N6741B N6753A N6756A N6763A N6766A N6773A N678xA SMU One 20 A 4 pin connector plug for connecting power and sense leads Only used in N6731B N6741B N6754A N6756A N6764A N6766A N6773A One 50 A 2 pin connector plug for connecting power leads Only used in N6753A N6755A N6763A N6765A A 2 pin connector plug for connecting the auxiliary measurement inputs Only used in N6781A and N6785A Two small jumpers for local sensing at the output connector Used in all except N6731B N6741B N6753A N6756A N6763A N6766A N6773A N678xA SMU Two large jumpers for local sensing at the output connector Only used in N6731B N6741B N6754A N6756A N6764A N6766A N6773A A 4 pin connector for connecting sense leads Wires p n 5185 8847 are used for local sensing Only used in N6753A N6755A N6763A N6765A A certificate of calibration referenced to the serial number Keysight 1253 6408 Phoenix Contact MC 1 5 8 ST 3 5 Keysight 1253 5826 Phoenix Contact MSTB 2 5 4 STF Keysight 1253 6211 Phoenix Contact PC 4 4 ST 7 62
98. elect System Admin Login and press Enter To password protect the Admin menu select System Admin Password The password must be numeric and up to 15 digits long When done log out of the Admin menu to activate the password You can now only enter the Admin menu by providing the right password f the password is lost access can be restored by setting an internal switch to reset the password to 0 If the message Locked out by internal switch setting or Calibration is inhibited by switch setting appears the internal switch is set to prevent the password from being changed Refer to the Service Guide Restoring the Non volatile Factory Settings Keysight N6700 User s Guide Remote interface settings are stored in non volatile memory The factory shipped interface settings documented in the following table are optimized for connecting your power system to a site network They should also work well for other network configurations These factory shipped LAN settings can be restored by selecting the Reset control in the System lIO LAN Config Reset menu All non volatile settings including LAN can be restored by selecting the Reset control located in the System Admin Nvram menu 59 3 Getting Started Factory shipped non volatile LAN settings Get IP Address Automatic Dynamic DNS naming service Enabled P Address 169 254 67 0 NetBIOS naming service Enabled Subnet Mask 255 255 0 0 Domain name Blank Defau
99. elect a lower range if you need better output resolution SCPI Command To select the lower range program a value that falls within the range CURR RANG 1 1 Front Panel Press the Current key Select a lower range and press Select For Keysight Models N678xA SMU operating in voltage priority mode you can specify a Current limit which limits the output current at the specified value In voltage priority mode the output voltage remains at its programmed setting as long as the load current is within the positive or negative limit Check Tracking to let the negative current limit track the positive current limit setting SCPI Command To select the current limit Specify a Current limit and or a CURR LIM 5 1 Current limit and press Select To select the negative current Check the Tracking box if you limit want the limit to track the CURR LIM NEG 3 1 limit To enable current limit tracking CURR LIM COUP ON 1 Front Panel Press the Current key Set the Output Mode This information applies to Keysight Models N678xA SMU only Keysight N6700 User s Guide For Keysight Models N678xA SMU you can select either Voltage priority or Current priority mode In voltage priority mode the output is controlled by a bi polar constant voltage feedback loop which maintains the output voltage at its positive or negative programmed setting The output voltage will remain at its programmed sett
100. els N678xA SMU Measure Range Selects voltage and current measurement range Sweep Specifies measurement points time interval and trigger offset Window Selects measurement window Rectangular Hanning Input Selects Auxiliary voltage measurements on Models N6781A N6785A Control Lets you abort a measurement in progress Transient Mode Selects voltage or current transient mode Fixed Step List Step Programs voltage and current step value Enables step triggers 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 list step voltage current dwell and trigger signals Reset Aborts the list and resets all list parameters TrigSource Specify the trigger source Bus Tran 1 4 Pin 1 7 Ext Control Initiates Triggers or Aborts output triggers Displays trigger state Protect OVP Configures over voltage protection function ocP Configures over current protection function Inhibit Configures the external inhibit signal Off Latching Live Coupling Disables ALL output channels when a protection fault occurs Wdog Configures the output watchdog timer Osc Enables disables oscillation protection on Models N678xA SMU Clear Clears output protection Displays output state States Reset Resets the instrument to its reset RST state SaveRecall Saves or recalls an instrument state PowerOn Selects the power
101. emedies THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER S SOLE AND EXCLUSIVE REMEDIES KEYSIGHT 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 This product comes with the standard product warranty Warranty options extended support contacts product maintenance agreements and customer assistance agreements are also available Contact your nearest Keysight Technologies Sales and Service office for further information on Keysight Technologies full line of Support Programs Technologies Licenses 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 Keysight 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 Trademarks Microsoft and Windows are U S registered trademarks of Microsoft Corporation Keysight N6700 User s Guide Safety
102. enerated a trigger for the output Use the following commands to enable an output to respond to triggers Front Panel SCPI Command Select TransientiMode To enable the voltage function For voltage step triggering set the On output 1 to respond to Voltage mode to Step For current triggers use step triggering set the Current VOLT MODE STEP 1 mode to Step Then press Select To enable the current function on output 1 to respond to triggers use CURR MODE STEP 1 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 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 Front Panel SCPI Command Select Transient Step To set a voltage and current Select the Trig Voltage box to trigger level for output 1 use set the voltage Select the Trig VOLT TRIG 15 1 Current box to set the current CURR TRIG 1 1 Enter a value and press Select 68 Keysight N6700 User s Guide Operating the Power System 4 Select the Transient Trigger Source
103. ent Function to Trigger The following commands select a measurement function Front Panel SCPI Command Not Available To select the voltage measurement function SENS FUNC VOLT ON 1 To select the current measurement function SENS FUNC CURR ON 1 Some power modules have two measurement converters which allow simultaneous voltage and current measurements Refer to Chapter 1 Model Differences In that case BOTH voltage and current measurements can be enabled If a power module has only one converter the parameter that it measures either voltage or current must be specified Capture 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 524 288 DATA POINTS OFFSET 524 287 524 288 DATA POINTS OFFSET 262 144 524 288 DATA POINTS OFFSET 0 OFFSET 0 to 2E9 gt 524 288 DATA POINTS TIME TRIGGER Keysight N6700 User s Guide 83 4 Operating the Power System 84 To offset the beginning of the acquisition buffer relative to the acquisition trigger use Front Panel SCPI Command Select Measure Sweep To offset the measurement on Enter an offset value and press Channel 1 by 100 points use Select SENS S
104. er Module N6732B N6742B 50 W 100 W 8V DC Power Module N6733B N6743B N6773A 50 W 100 W 300 W 20 V DC Power Module N6734B N6744B N6774A 50 W 100 W 300 W 35 V DC Power Module N6735B N6745B N6775A 50 W 100 W 300 W 60 V DC Power Module N6736B N6746B N6776A N6777A 50 W 100 W 300 W 100 V DC Power Module N6751A N6752A 50 W 100 W High Performance Autoranging DC Power Module N6753A N6754A N6755A N6756A 300 W 500 W High Performance Autoranging DC Power Module N6761A N6762A 50 W 100 W Precision DC Power Module N6763A N6764A N6765A N6766A N6781A N6782A N6784A N6785A N6786A N6783A MFG N6783A BAT 300 W 500 W Precision DC Power Module 20 W Source Measure Unit SMU 80 W Source Measure Unit SMU 18 W 24 W Application Specific DC Power Module Options Mainframe Description Options OL1 English Manual Set Contains User s Guide and Service Guide Also available as part number 5969 2939 908 Rack Mount Kit For mounting in a 19 inch EIA rack cabinet Also available as Model N6709A FLR Filler module For mainframes with less than four power modules Also available as Model N6708A Power Module Options 054 High Speed Test Extensions Includes digitized output measurements and output list capability Available for Models N673xB 4xB 5xA 7xA Included with Models N676xA N678xA SMU and N6783A 760 NOTE Output disconnect polarity reversal Disconnects the and output and sense term
105. er s Guide Getting Started 3 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 a you wish to change In the display below channel 1 s current setting is selected Enter a value using the numeric keypad Then press Enter o 6 O 0 0000V 0 0000A E o ee s ooa Arrow Keys You can also use the arrow keys to adjust the value up or down and ay switch between and limits on Models N678xA SMU When the 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 Press Current to select the current entry field In the display below channel 1 s current setting is selected Enter the desired setting using the numeric keypad Then press Enter Chan 1 Qutput Current 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 Enabling the Output Use the On Off key to enable the output On Off Ifa 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
106. es a measurement returns the high level of a current pulse Takes a measurement returns the low level of a current pulse Takes a measurement returns the maximum current Takes a measurement returns the minimum current Takes a measurement returns the average output power Takes a measurement returns the average voltage Takes a measurement returns the total rms voltage AC DC Takes a measurement returns the high level of a voltage pulse Takes a measurement returns the low level of a voltage pulse Takes a measurement returns the maximum voltage Takes a measurement returns the minimum voltage Array commands only on N676xA N678xA SMU and Option 054 Takes a measurement returns the instantaneous output current Takes a measurement returns the instantaneous output power Takes a measurement returns the instantaneous output voltage Enables disables the specified output channel s Enables disables channel coupling for output synchronization Selects which channels are coupled Specifies a maximum delay offset to synchronize output changes Returns the maximum delay offset required for a mainframe Sets the output turn off sequence delay Sets the output turn on sequence delay Sets the mode for turn on off transitions N6761A N6762A Specifies the turn on turn off impedance only on N678xA SMU Sets the remote inhibit input Programs the power on state Keysight N6700 User s Guide 17 1 Quick Reference SCPI Command
107. es are located at appropriate places throughout this Guide Do not operate the instrument in the presence of flammable gasses or fumes Cleaning ZANNE 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 side and 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 SHOCK HAZARD To prevent electric shock unplug the unit before cleaning Use a dry cloth or one slightly dampened with water to clean the external case parts Do not use detergent or chemical solvents Do not attempt to clean internally Power Module Channel Assignment The slot location of a power module in the mainframe determines the channel assignment of the module When viewed from the rear the module next to the GPIB connector is always output channel one Numbering continues sequentially to the left from 1 up to 4 Double wide power modules are assigned the number of the lowest numbered slot in which is installed For example if a double wide module is installed in slots 3 and 4 it is assigned channel number 3 Grouped power modules those that are connected in parallel and have
108. ets the measurement resolution Selects the voltage measurement range Enables disables measurement autoranging N6781A N6782A Selects measurement window N676xA N678xA SMU Option 054 Sets the output current Sets the triggered output current Sets the positive current limit only on N678xA SMU N6783A Sets the current limit tracking state only on N678xA SMU Sets the negative current limit only on N678xA SMU N6783A BAT 18 Keysight N6700 User s Guide SCPI Command SOURce CURRent continued MODE FlXed STEP LIST chanlist PROTection DELay TIME lt NRf gt chanlist STARt SCHange CCTRans chanlist STATe lt Bool gt chanlist RANGe lt NRf gt chanlist SLEW IMMediate lt NRf gt INFinity chanlist MAXimum lt Bool gt chanlist DiGital INPut DATA OUTPut DATA lt NRf gt PIN lt 1 7 gt FUNCtion DIO DINPut TOUTput TINPut FAULt INHibit ONCouple OFFCouple POLarity POSitive NEGative TOUTput BUS ENABle lt Bool gt FUNCtion CURRent VOLTage chanlist 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
109. evel 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 Selecting the highlighted command accesses this lower level Press the ri command Measure Transient Protect States System Voltage Current Hice Sequence Advanced ght arrow gt key to traverse the menu until the Protect s highlighted Press Sel to select the Protect command Output Measure Transient a States System OWP OCP Inhibit Coupling WOog s2 Clear The menu path now shows that the commands shown on the second line are loc ated under the Protect command The OVP command is highlighted The third line indicates which functions are located under the OVP command Press Sel to select the OVP command Chan 1 Protect Overvoltage protection settings Keysight N6700 User s Guide Enter Channel Getting Started 3 The command menu is now at the function control level This is the lowest level in this path 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 OwP Press Channel 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 throug
110. f the output ch 5 microseconds Pin 3 can modes which are stored in input signal con trol the output annels in the mainframe The signal latency is be programmed for the followin g Inhibit non volatile m emory LATChing Causes a logic true transition on the Inhibit input to disable all outputs The outputs will remain disabled after the inhibit signal is received LIVE 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 OFF The Inhibit input is ignored Front Panel SCPI Command Select System lO DigPort Pins To configure the Inhibit function Select pin 3 then Function then _D1G PIN3 FUNC INH l Inhibit In In the Polarity field o select the inhibit input polarity select either Positive or SDIO RINS EOE eee Negative o latch the Inhibit signal S EPA Inhibi OUTP INH MODE LATC RI To set the Inhibit signal live Select either Latching or Live OUTP INH MODE LIVE To disable the Inhibit signal To disable the Inhibit signal select Off OUTP INH MODE OFF Keysight N6700 User s Guide 107 Appendix B_ Using the Digital Port 108 Fault Inhibit System Protection FLT INH my 123 4 5 6 The following figure illustrates some ways that you can connect the Fault Inhibit pins of the connector FLT INH FLT
111. ffset for each mainframe Front Panel SCPI Command In the front panel menu of each To specify the common delay mainframe select offset for each mainframe in Output Sequence Couple seconds In the Delay offset field enter the OUTP COUP DOFF 051 delay offset value of the slowest To return the delay offset of the power module of all the slowest power module in each mainframes in milliseconds then mainframe the maximum delay press Select offset in seconds The Max delay offset for this frame OUTP COUP MAX DOFF field displays the delay offset of the slowest power module in this frame 3 Connect and configure the digital connector pins of the synchronized mainframes as described in the following section Digital Connections and Configuration Only pins 4 through 7 can be configured as synchronization pins You cannot configure more than one ON couple and one OFF couple pin per mainframe The polarity of the pins is not programmable Keysight N6700 User s Guide The digital connector pins of the synchronized mainframes that contain coupled channels must be connected together as shown in the following figure In this example pin 6 will be configured as the output On control Pin 7 will be configured as the output Off control The ground or Common pins also need to be connected together 117 Appendix D Output On Off Synchronization
112. fied by a new printing date Declaration of Conformity Declarations of Conformity for this product and for other Keysight products may be downloaded from the Web Go to http www keysight com go conformi and click on Declarations of Conformity You can then search by product number to find the latest Declaration of Conformity Waste Electrical and Electronic Equipment WEEE Directive 2002 96 EC This product complies with the WEEE Directive 2002 96 EC marketing requirement The affixed product label see below indicates that you must not discard this electrical electronic product in domestic household waste Product Category With reference to the equipment types in the WEEE directive Annex 1 this product is classified as Monitoring and Control instrumentation product Do not dispose in domestic household waste To return unwanted products contact our local Keysight office or see www keysight com environment for more information roduct gt Certification Keysight Technologies certifies that this product met its published specifications at time of shipment from the factory Keysight 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 Exclusive R
113. fuse which is not customer accessible Keysight 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 a Keysight Sales and Service Office for service and repair to ensure that safety features are maintained In Case of Damage Instruments that 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 th
114. g 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 E Specifications Appendix A describes the mainframe characteristics Using the Digital Port Appendix B describes how to configure and use the digital port on the back of the instrument Power Allocation Appendix C describes the power allocation function which applies to power system in which the combined ratings of the power modules exceed the power rating of the mainframe Output On Off Synchronization Appendix D discusses output on off synchronization which lets you accurately synchronize output turn on sequences across multiple mainframes Source Operating Modes Appendix E discusses operating mode information for all power modules For complete details on the SCPI Standard Commands for Programmable Instruments commands refer to the N6700 Programmer s Reference Help file included on the Keysight N6700 Product Reference CD This CD ROM is shipped along with your instrument You can contact Keysight Technologies at one of the following telephone numbers for warranty service or technical support information In the United States 800 829 4444 In Europe 31 20 547 2111 In Japan 0120 421 345 Or use our Web link for information on contacting Keysight in your country or specific location www keysight com find assist Or contact your Ke
115. h the menu levels Chan 2 ProtectiO wP OWP Level 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 off The front panel status indicator will show OV Exiting the Command Menu Meter Back There are two ways to exit the command menu Press Meter to immediately return to the metering screen This is the quickest way to return to metering mode Press Back 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 programming commands are found in the Programmer s Reference Help file on your Keysight N6700 Product Reference CD In Case of Trouble Keysight N6700 User s Guide Press the Help key to obtain additional help about any function control menu level Press the Back key to exit the Help menu The front panel Err indicator comes on if self test fails or if other operating problems occur with your instrument Press the Error key to display the list of errors Refer to the N6700 Service Guide for further information The N6700 Service Guide is included as part of the optional Manual Set Option OL1 An electronic copy of the N6700 Service Guide is also i
116. he DC output These filters typically include common mode capacitors connected to the chassis of the power system Since the AC input has an earth ground any load that is also earth grounded provides a possible return path for common mode currents The following figure illustrates a typical situation where a load that might otherwise be floating becomes grounded thereby providing a return Keysight N6700 User s Guide C S Installation 2 path for any injected currents In this case the return path is created by the low side of the scope probe which is connected to the load circuit common and also to the scope s chassis For this and similar cases the following steps by order of preference will help mitigate common mode current spikes appearing at the output when the power system is turned on or off by the AC line switch 1 Install a ferrite core Keysight p n 9170 2131 on the power cord to insert additional impedance in the current path This ferrite core is now installed inside N6701A and N6702A mainframes 2 Installa separate bonding wire from the load s common point to the ground terminal of the power system This provides a lower impedance path that helps direct injected currents away from the DC output leads and the sensitive load 3 Break the return path through the external equipment For example instead of the single ended scope shown in the figure you can use a differential scope with a floating
117. he Keysight N6700 Modular Power System will also be referred to as MPS and power system throughout this manual KEYSIGHT TECHNOLOGIES 1 Quick Reference The Keysight N6700 Modular Power System At a Glance The Keysight N6700 Modular Power System is a configurable one rack unit 1U platform that lets you mix and match power modules to create a power system optimized for your test system requirements Keysight N6700 N6702 MPS mainframes are available in power levels of 400 W 600 W and 1 200 W Up to four power modules can be installed in each mainframe Power modules come in power levels of 20 W through 500 W have various voltage and current combinations and provide the following performance features The N673xB N674xB and N677xA DC Power Modules provide programmable voltage and current measurement and protection features making these economical models suitable for powering the device under test or system resources such as fixture controls 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 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 N678xA Source
118. he voltage measurement AUXiliary channel Calibrates the auxiliary voltage measurement only on N6781A N6785A DISPlay WINDow CHANnel lt channel gt Selects the channel in 1 channel meter view VIEW METER1 METER4 Selects 1 channel or 4 channel meter view FETCh Fetch commands only on N676xA N678xA SMU and Option 054 SCALar CURRent DC chanlist Returns the average current ACDC chanlist Returns the total rms current AC DC HIGH chanlist Returns the high level of a current pulse LOW chanlist Returns the low level of a current pulse MAXimum chanlist Returns the maximum current MINimum chanlist Returns the minimum current POWer DC chanlist Returns the average output power VOLTage DC chanlist Returns the average voltage ACDC chanlist Returns the total rms voltage AC DC HIGH chanlist Returns the high level of a voltage pulse LOW chanlist Returns the low level of a voltage pulse MAXimum chanlist Returns the maximum voltage MINimum chanlist Returns the minimum voltage 16 Keysight N6700 User s Guide SCPI Command FETCh continued ARRay CURRent DC chanlist POWer DC chanlist VOLTage DC chanlist ELOG lt NR1 gt chanlist FORMat DATA ASCII REAL BORDer NORMal SWAPped INITiate IMMediate ACQuire chanlist ELOG chanlist TRANsient chanlist CONTinuous TRANsient lt Bool gt cha
119. hrough 9 keys enter numbers The key is the decimal point The key is only used to enter a minus sign The E key enters an exponent Add the value to the right of the E The backspace key deletes digits as it backspaces over them The Y arrow keys increment or decrement the voltage or current settings They are also used to select letters in alphabetic entry fields The Enter key enters a value If you exit a field without pressing the Enter key the value is ignored 13 1 Quick Reference Front Panel Menu Reference Menu Command Output Voltage Menu commands that appear grayed out on the front panel are either not available for the power module or are password protected Control Description Programs voltage setting limits and ranges Current Programs current setting limits and ranges Mode Programs output priority mode on Models N678xA SMU Sequence Delay Programs Turn on Turn off delay Couple Couples output channels for output on off synchronization Advanced Slew Voltage Programs voltage slew rate Current Programs current slew rate on Models N678xA SMU Power Programs the power allocation function Pol Lets you reverse the polarity of the output and sense terminals Resistance Programs output resistance on Models N6781A N6785A Bandwidth Programs output voltage bandwidth on Models N678xA SMU Tmode Programs turn on turn off impedance on Mod
120. ial Bus USB The following figure illustrates a typical USB interface system Il S5 Vl Vl Connect to Instrument Connect to USB USB port on port on PC instrument 1 If you have not already done so install the Keysight lO Libraries Suite from the Automation Ready CD that is shipped with your product 2 Connect your instrument to the USB port on your computer 3 With the Connection Expert utility of the Keysight IO Libraries Suite running the computer will automatically recognize the instrument This may take several seconds When the instrument is recognized your computer will display the VISA alias IDN string and VISA address This information is located in the USB folder 4 Note that you can also view the instrument s VISA address from the front panel Press the Menu key then use the navigation keys to select System lIO USB Identification 5 You can now use Interactive lO within the Connection Expert to communicate with your instrument or you can program your instrument using the various programming environments LAN Interface For detailed information about LAN interface connections refer to the Keysight Technologies USB LAN GPIB Interfaces Connectivity Guide located on the Automation Ready CD that is shipped with your product The following steps will help you quickly get started connecting and configuring your instrument on a local area network The two types of local area networks connect
121. in max measurements SENS ELOG FUNC VOLT MINM ON 1 SENS ELOG FUNC CURR MINM ON 1 Keysight N6700 User s Guide 91 4 Operating the Power System lf a power module has simultaneous measurements see chapter 1 Model Differences you can enable BOTH voltage and current measurements on the same output channel Power modules that do not have simultaneous measurement capability cannot externally log both voltage and current Some power modules also have multiple measurement ranges Selecting a lower measurement range provides greater measurement accuracy provided that the measurement does not exceed the range To select lower measurement ranges use Front Panel SCPI Command Not Available To set the 5 V measurement range SENS ELOG VOLT RANG 5 1 To set the 1 A measurement range SENS ELOG CURR RANG 1 1 Seamless Measurements Seamless voltage and current measurement autoranging is available on Keysight Models N6781A N6782A N6785A and N6786A This enables a wide dynamic measurement range with no data lost across ranges Autoranging does not include the 10 WA range which must be selected manually Front Panel SCPI Command Not Available To enable seamless elog autoranging SENS ELOG VOLT RANG AUTO ON 1 SENS ELOG CURR RANG AUTO ON 1 Specify the Integration Period 92 The integration period can be set from
122. inals Switches the and output and sense polarities Not available on N6741B N6751A N6752A N676xA or N678xA SMU 761 NOTE Output disconnect Disconnects and output and sense terminals Available for all power modules UK6 Commercial calibration with test results data 1A7 ISO 17025 calibration certificate 2UA 200 microampere measurement range with output disconnect relays Only on Models N6761A N6762A J01 Tracking overvoltage protection function Only available on Models N6752A N6754A and N6762A when installed in an N6700B N6701A or N6702A mainframe 1 A small AC network is always present across the output terminals 24 Keysight N6700 User s Guide Installation 2 Part Number Items Supplied Mainframe Items Description Power Cord A power cord suitable for your location Ferrite Core for N6700B Installs on power cord to reduce common mode currents Digital Connector plug Product Reference CD ROM Automation Ready CD ROM Quick Reference Guide T 10 Torx tool 8 pin connector for connecting signal lines to the digital port Includes drivers and documentation Contains Keysight 10 Libraries Suite Contains quick reference information Torx tool for installing or removing power modules Call Keysight Sales amp Support Office Keysight 9170 2131 Keysight 1253 6408 Phoenix Contact MC 1 5 8 ST 3 5 Keysight 5969 2914 Keysight E2094N Keysight 5969 2950 Keysight 8710 2416 Power Module Items 8 A Output Conn
123. ination of up to four simultaneous data socket control socket and telnet connections to be made Keysight instruments have standardized on using port 5025 for SCPI socket services A data socket on this port can be used to send and receive ASCII SCPI commands queries and query responses All commands must be terminated with a newline for the message to be parsed All query responses will also be terminated with a newline The socket programming interface also allows a control socket connection The control socket can be used by a client to send device clear and to receive service requests Unlike the data socket which uses a fixed port number the port number for a control socket varies and must be obtained by sending the following SCPI query to the data socket SYSTem COMMunicate TCPip CONTrol ae After the port number is obtained a control socket connection can be opened As with the data socket all commands to the control socket must be terminated with a newline and all query responses returned on the control socket will be terminated with a newline To send a device clear send the string DCL to the control socket When the power system has finished performing the device clear it echoes the string DCL back to the control socket Service requests are enabled for control sockets using the Service Request Enable register Once service requests have been enabled the client program listens on the control
124. ing as long as the load current remains within the positive or negative current limit In current priority mode the output is controlled by a bi polar constant current feedback loop which maintains the output sourcing or sinking current at its programmed setting The output current will remain at ts programmed setting as long as the load voltage remains within the positive or negative voltage limit 63 4 Operating the Power System Front Panel SCPI Command Select Output Mode To set output 1 to current priority Select either Voltage priority or FUNC CURR 1 Current priority and press Select When switching between Voltage priority and Current priority the output is turned off and the output settings revert to their Power on or RST values Refer to Appendix E for information about voltage and current priority mode operation Set the Slew Rate Front Panel SCPI Command Select Output Advanced Slew To set the voltage slew rate to 5 V s Then select Voltage or Current VOLT SLEW 5 1 Enter the voltage or current To set the current slew rate to 1 A s slew rate in the Slew Rate field CURR SLEW 1 1 Check Max slew rate to To set the fastest slew rate program the fastest slew rate VOLT SLEW MAX 1 The voltage slew rate determines the rate at which the voltage changes to anew programmed setting When set to MAXimum INFinity or to a very large value the slew rate will be limited b
125. inning Of Step Returns the number of beginning of step list points Generate triggers at the End Of Step Returns the number of end of step list points Sets the voltage list Returns the number of voltage level points Sets the power limit on output channels Sets the output resistance only on N6781A N6785A Enables disables output resistance programming only N6781A N6785A Generate a trigger output on the voltage or current step transient Sets the output voltage Sets the triggered output voltage Sets the voltage bandwidth only on N678xA SMU Keysight N6700 User s Guide 19 1 Quick Reference SCPI Command SOURce VOLTage continued LIMit POSitive IMMediate AMPLitude lt NRf gt chanlist COUPle lt Bool gt chanlist NEGative IMMediate AMPLitude lt NRf gt chanlist MODE FlXed STEP LIST chanlist PROTection LEVel lt NRf gt chanlist DELay TIME lt NRf gt chanlist REMote POSitive LEVel lt NRf gt chanlist NEGative LEVel lt NRf gt chanlist TRACking STATe lt Bool gt chanlist OFFSet lt NRf gt chanlist RANGe lt NRf gt chanlist SLEW IMMediate lt NRf gt INFinity chanlist MAXimum lt Bool gt chanlist STATus OPERation EVENt chanlist CONDition chanlist ENABle lt NRf gt chanlist NTRansition lt NRf gt chanlist PTRansition lt NRf gt chanlist PRESet Q
126. ion ABORt ACQuire chanlist Resets the measurement trigger system to the Idle state ELOG chanlist Stops the external data log TRANsient chanlist Resets the transient trigger system to the Idle state CALibrate CURRent LEVel lt NRf gt channel Calibrates the output current programming LIMit NEGative lt NRf gt channel POSitive lt NRf gt channel MEASure lt NRf gt channel Calibrates the negative current limit only on N6783A Calibrates the positive current limit only on N678xA SMU Calibrates the current measurement PEAK channel Calibrates the peak current limit only on N675xA N676xA DATA lt NRf gt Enters the calibration value DATE lt date gt channel Sets the calibration date DPRog channel Calibrates the current downprogrammer LEVel P1 P2 P3 PASSword lt NRf gt RESistance 20 6 channel SAVE STATE lt Bool gt lt NRf gt Advances to the next calibration step Sets the numeric calibration password Calibrates the output resistance only on N6781A N6785A Saves the new cal constants in non volatile memory Enables disables calibration mode VOLTage LEVel lt NRf gt channel Calibrates the output voltage programming CMRR channel Calibrates common mode rejection ratio only N675xA N676xA LIMit POSitive lt NRf gt channel MEASure lt NRf gt channel Calibrates the positive voltage limit only on N678xA SMU Calibrates t
127. ions that are discussed in this section are site networks and private networks Keysight N6700 User s Guide 51 3 Getting Started Connecting to a Site LAN A site LAN is a local area network in which LAN enabled instruments and computers are connected to the network through routers hubs and or switches They are typically large centrally managed networks with To Network Interface To LAN Port Card NIC To Site LAN Instrument services such as DHCP and DNS servers 1 If you have not already done so install the Keysight IO Libraries Suite from the Automation Ready CD that is shipped with your product 2 Connect the instrument to the site LAN The factory shipped instrument LAN settings are configured to automatically obtain an IP address from the network using a DHCP server DHCP is set On Note that this may take up to one minute The DHCP server will register the instrument s hostname with the dynamic DNS server The hostname as well as the IP address can then be used to communicate with the instrument The front panel Lan indicator will come on when the LAN port has been configured If you need to manually configure any instrument LAN settings refer to Configuring the LAN Parameters later in this chapter for information about configuring the LAN settings from the front panel of the instrument 3 Use the Connection Expert utility of the Keysight IO Libraries Suite to add the N6700
128. ist Sets the voltage trigger level SLOPe POSitive NEGative chanlist Sets the voltage trigger slope ELOG IMMediate chanlist Triggers the external data log immediately SOURce BUS EXTernal IMMediate PIN lt 1 7 gt chanlist Sets the external data log trigger source TRANsient IMMediate chanlist Triggers the output immediately SOURce BUS EXTernal IMMediate PIN lt 1 7 gt Sets the output trigger source TRANsient lt 1 4 gt chanlist Common Commands Command Description Command Description CLS Clear status RDT Return output channel descriptions ESE lt NRf gt Standard event status enable RST Reset ESR Return event status register SAV lt NRf gt Saves an instrument state IDN Return instrument identification SRE lt NRf gt Set service request enable register LRN Returns a sequence of SCPI commands STB Return status byte OPC Enable operation complete bit in ESR TRG Trigger OPT Return option number TST Performs self test then returns result RCL lt NRf gt Recalls a saved instrument state WAI Waits until all device commands are done Keysight N6700 User s Guide 21 1 Quick Reference RST Settings CAL STAT OF SENS ELOG CURR RANG AUTO OFF CURR 0 08 or MIN SENS ELOG FUNC CURR O CURR LIM MAX SENS ELOG FUNC CURR MINM
129. its current limit setting Either a LIM positive current limit or LIM negative current limit status flag is set to indicate that a current limit has been reached As shown by the vertical portions of the load line when the unit is sinking power the output voltage may continue to increase in the positive or negative direction as more current is forced into the unit When the output voltage exceeds either the positive or negative over voltage setting the output will shut down the output relays will open and either the OV or OV and the PROT status bits will be set Either the user defined over voltage setting or the local over voltage function can trip the over voltage protection Current Priority Mode In current priority mode the output current should be programmed to the desired positive or negative value A positive voltage limit value should also be set The voltage limit should always be set higher than the actual output voltage requirement of the external load With tracking enabled the negative voltage limit tracks the positive voltage limit setting With tracking disabled you can set different values for the positive and negative voltage limits The following figure shows the current priority operating locus of the power modules The area in the white quadrants shows the output as a source sourcing power The area in the shaded quadrants shows the output as a load sinking power Voltage 20 V OV
130. ks the real time programmed settings Option JO1 is only available on models N6752A N6754A and N6762A 87 4 Operating the Power System Front Panel SCPI Command Select Protect OVP To set an OVP of 10 V for output 1 Enter a value inthe OVP level VOLT PROT 10 1 2 For JO1 units enter a value in VORT PROI du AS the Tracking OVP Offset box To enable track ng OVP for output 1 and check the Enable box eer cil Then press Select To set the tracking offset for output 1 VOLT PROT TRAC OFFS 2 1 Keysight Models N678xA SMU also have a back up local OVP function Refer to Over voltage Protection in chapter 2 for a description of the feature Additionally for Keysight Model N6784A you can program a negative over voltage value Enter the value in the OVP field Set the Over Current Protection 88 When over current protection is enabled the power system turns off the output if the output current reaches the current limit setting and transitions from CV to CC mode Front Panel SCPI Command Select Protect OCP To enable OCP for outputs 1 and 2 Check Enable OCP and press Select CURR PROT STAT 1 1 2 You can also specify an OCP delay to prevent momentary CV to CC status changes from tripping the over current protection The power system may momentarily transition into CC mode when it is turned on when an output value is programmed or when the output load is connected In most
131. l shut down the output relays will open and the OC and PROT status bits will be set Keysight N6700 User s Guide Index A Admin Menu PASSWOMG coococicccicoccccioccconccccinncnnos 59 A Asahi atti dts Sah as fa 26 29 102 TL gs te st o e ee en e 64 allocation POWER eem canon shin alee we 110 AULOFANIGING wes tasers Sica ances osha ture en Saclay 121 auxiliary voltage measurement ou 44 auxiliary voltage measurements cceeeeeees 78 B Dar WIG dedos 66 DECO CN car tar AS 29 C Capacitor external ts arsen oeaan 42 COUT NO 3 CC secrets dtett Sarin E ee es Sete 13 channel POUP tek atid adas 39 95 LOCATION sc ait tee tiie E shave abies baie ead 26 o Nal na ryt Errore 26 SOLO CHIR hae ste sy eens arth ani a eat ds 46 62 cleaning dea eae ee teat OH ae ek es 26 connections guard iea aen a cnet inlets onal 34 Multiple a aa E A A 35 Negative VONAGE raien ci n 42 paralel casn daba 38 positive y ltage in ane aaa 42 remote SENSING cx o iene a A 36 E AERA ET AEE A AE E EE 40 contrast front panel ssesssesssnssnssnsernserrserree 97 control port CONNECTION ss sssesssisseisseissirrreneene 104 COMULOUSOCKET et a O 58 CRA een eean ed a dd 13 a AER AREE E Bere ese caret terre tener ere eee 13 110 current measurementrangE citada 77 prionityiModes cian 63 LELURMING CURE NT datane erectos el 82 SOLEMN G EEEN ENEAS AE rias 47 63 CUNA PROM stn teeth Snead Sect 123 CUIENUSINKING eiii 121 GV Ei a ah Ts
132. lay is screen Access front panel command menu or decrement voltage saver mode Select an output channel to control and current settings The Rear Panel At a Glance 3 pin IEC 320 AC input connector Chassis ground Power cord requires GPIB connector binding post ground conductor 12345674 UIT SPERRER Output connector 8 pin digital control USB connector LAN connector Includes output and connector 10 100 Base T sense terminals Connector function is Left LED indicates user configurable activity Right LED indicates link integrity Mio 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 Keysight N6700 User s Guide 11 1 Quick Reference Front Panel Display At a Glance 12 Single channel view Voltage Bar indicates output Current measurement polarity is reversed measurement Press the Meter key n to toggle between aiak 0 1789A views CEMENTO Operating a Voltage and Interface status CV constant voltage current settings IO a
133. le on the N6700B N6701A and N6702A mainframes Refer to the Service Guide for information on pin functionality of the 4 pin connector KEYSIGHT TECHNOLOGIES Appendix B_ Using the Digital Port Digital Control Port An 8 pin connector and a quick disconnect connector plug are provided on each instrument for accessing the five digital control port functions aa SCREWS Tere ee rinivinin Output trigger signal or J g 19 Signal Common Input trigger o lt signal Ox 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 digital port functions For a complete description of the electrical characteristics of the digital I O port refer to Appendix A Pin Function Available configurable pins Digital I O and Digital In Pins 1 through 7 External Trigger In Out Pins 1 through 7 Fault Out Pins 1 and 2 Inhibit In Pin 3 Output State Pins 4 through 7 Common 1 Pin 8 In addition to the configurable pin functions the active signal
134. lies to Keysight Models N678xA SMU only This lets you specify high impedance or low impedance mode at output turn on and turn off Low impedance At turn on the output relays are closed after which the output is programmed to the set value At turn off the output is first programmed to zero after which the output relays are opened High impedance At turn on the output is programmed to the set value after which the output relays are closed At turn off the output relays are opened while the output remains at its set value This reduces current pulses that may be undesirable in some applications Front Panel SCPI Command Select Output Advanced Tmode To set output 1 to a high Select either High Impedance or impedance mode Low impedance and press Select OUTP TMOD HIGHZ 1 67 4 Operating the Power System 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 g
135. lowing wiring requirements apply when using Keysight Models N678xA SMU in the High bandwidth modes with remote sensing Refer to chapter 4 under Output Bandwidth for more information about the bandwidth settings Keysight N6700 User s Guide 1 Load wires must be twisted pair or coax and must not be twisted along with the sense wires Refer to the above table for length L 2 Sense wires must be twisted pair or coax and must not be twisted with the load wires 3 No capacitors are allowed within the sense compensated load path 4 Ifthe load capacitor C1 is not located at the sense point the distance from the sense point to the load capacitor cannot exceed 15 cm and must be twisted pair coax or pc traces 33 2 34 Installation 1 N678xA SMU connector 2 Guard shield can be the shield of a coaxial cable 5 If the test fixture consists of pc traces the positive and negative traces should be directly facing on adjacent layers To minimize inductance the width w of the traces should be at least as great as the thickness of the dielectric h It is better to make the traces much wider than this minimum requirement in order to minimize the DC resistance wi j h 7 Low Bandwidth Mode with Remote or Local Sensing All previously stated wiring requirements still apply in Low bandwidth mode except for the following The 15 cm maximum limit between the sense point and the load capacitor see
136. lt Gateway 0 0 0 0 TCP keepalive Enabled Obtain DNS server from Enabled TCP keepalive seconds 1800 DHCP DNS server Blank Ethernet Auto negotiation Enabled Host name A N67XXX XXXXX Ping server Enabled Web password Blank Other factory shipped non volatile settings Admin Calibration password O zero On Off key affects all Disabled channels Calibration date March 5 2003 Output Inhibit mode Off Channel grouping No groups Saved states RST command Digital port function all pins Digital In Screen contrast 50 Digital port polarity all pins Positive Screen saver Enabled Front panel lockout Disabled Screen saver delay 60 minutes Front panel meter view 1 channel USB interface Enabled GPIB Address 5 Wake on 1 0 Enabled Key clicks Enabled Web server Enabled LAN interface Enabled 60 Keysight N6700 User s Guide KEYSIGHT TECHNOLOGIES 4 Operating the Power System Programming INCA oran nt tante 62 Synchronizing Output Steps oocccccnicnncnconocnonconcnnnnnnnncnn cnn nnnnnnnnnnn 68 Programming Qutput LISTS 1ssnaistasasciasesaceaatsinantaiaiasasdtaseaasedaneasiddads 72 Making Measurements cccecceeceeeceeeeeeeeeeeeceeeeeeeeeeseeneesetenseeatens 77 Using the DiGitiZer ceccesccecesecceceseeeeceeeeeeeecresaeseesaeseeeseeseeeateas 79 Using the Protection Functions eolica criacicciiao 87 External Data LoggiN G RARA 91 System Related Operations ccccccecesecseceeeeeeeeeeeeeeeeeee
137. mands If a mainframe has its ON OFF key coupled located in the System Preferences Keys menu turning the output on or off on any coupled channel will cause all coupled channels as well as non coupled channels on that mainframe to turn on or off 118 Keysight N6700 User s Guide KEYSIGHT TECHNOLOGIES Appendix E Source Operating Modes ingl rant CARON merei aaa a tease statettacst aa eeeentace se 120 Keysight N678xA Multi Quadrant Operation eee 122 This appendix discusses the difference between constant voltage and constant current operating modes multiple output quadrant operation and other advanced source functions Appendix E Source Operating Modes Single Quadrant Operation The Keysight N6700 Modular Power System can operate in either constant voltage CV or constant current CC over the rated output voltage and current Constant voltage mode is defined as an operating mode in which the de source maintains its output voltage at the programmed voltage setting in spite of changes in load line or temperature Thus when the load resistance changes the output voltage remains constant while the output current changes to accommodate the change in load Constant current mode is defined as an operating mode in which the dc source maintains its output current at the programmed current limit in spite of changes in load line or temperature Thus when the load resistance changes the output current remai
138. mum rated value For Keysight Models N678xA SMU the power limit function does not apply Keysight N6700 User s Guide Power Allocation Appendix C Module Power Allocation The following commands program the module power limit function Front Panel SCPI Command Select Output Advanced Power To set a power limit on output 1 Enter a power limit for each output POW LIM 100 1 To query the power limits that are set send Front Panel SCPI Command Select OutputAdvanced Power POW LIM 1 4 The power allocation for all output channels is displayed in the dialog boxes To return all output channels to their default settings you can either cycle AC power or send the following commands Front Panel SCPI Command Select States Reset RST or POW LIM MAX 1 4 When an output channel is set to MAX it returns to its maximum rated value and the power limit function will not activate Keysight N6700 User s Guide 111 KEYSIGHT TECHNOLOGIES Appendix D Output On Off Synchronization Synchronizing Output Turn on Delays eee eeeeeeeeereeees 114 Synchronizing Multiple Mainframes cececeeeeeeeeeteeteeteeees 117 Opera NoN e ee ee aaa e aeee a Ea e eE E E 118 This appendix discusses output on off synchronization This function lets you accurately synchronize output turn on sequences by letting you specify a common delay offset which serves as a reference point for the user prog
139. ncluded on the N6700 Product Reference CD ROM 49 3 Getting Started Connecting to the Interfaces The Keysight N6700 MPS supports GPIB LAN and USB interfaces All three interfaces are live at power on Connect your interface cable to the appropriate interface connector Information on configuring the interfaces is found later in this chapter The front panel IO indicator comes on whenever there is activity on the remote interfaces The front panel Lan indicator comes on when the LAN port is connected and configured Power system mainframes provide Ethernet connection monitoring With Ethernet connection monitoring the instrument s LAN port is continually monitored and automatically reconfigured when the instrument is unplugged for a minimum of 20 seconds and then reconnected to a network GPIB Interface For detailed information about GPIB interface connections refer to the Keysight Technologies USB LAN GPIB Interfaces Connectivity Guide located on the Automation Ready CD that is shipped with your product 50 Connect to GPIB Interface Connect to GPIB Card installed in PC port on instrument The following steps will help you quickly get started connecting your instrument to the General Purpose Interface Bus GPIB The following figure illustrates a typical GPIB interface system GPIB Cable il a m M MAA Instrument 01 pa Wh Wl Wil Wl Instrument
140. nerate a pulse to List mode This example programs a voltage pulse Front Panel SCPI Command Select Transient Mode Set the To program output 1 use voltage mode to List 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 O 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 O 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 an
141. nge from the voltage or To set the 1 A measurement range current dropdown menu Then SENS CURR RANG 1 1 press Select The maximum measurable current is the maximum rating of the range If the measurement exceeds the range an Overload error will occur Examples of programming measurement ranges are 3 06 A range To select program values gt 0 1 A and lt 3 06 A 0 10 A range To select program values gt 200 uA and lt 0 1 A 200 pA range option 2UA To select program values lt 200 A Seamless Measurements Seamless voltage and current measurement autoranging is available on Keysight Models N6781A N6782A N6785A and N6786A This enables a wide dynamic measurement range with no data lost across ranges Autoranging does not include the 10 pA range which must be selected manually Front Panel SCPI Command Select Measure Range To enable seamless voltage or current Select Auto from the voltage autoranging on channel 1 or current dropdown menu SENS VOLT RANG AUTO ON 1 Then press Select SENS CURR RANG AUTO ON 1 77 4 Operating the Power System Simultaneous Voltage and Current Measurements Some models have simultaneous voltage and current measurement capability Refer to Chapter 1 Model Differences In this case BOTH voltage and current can be acquired on any measurement Front Panel SCPI Command Not available Select the measurement function SENS FUNC VOLT ON 1 S
142. nlist MEASure SCALar CURRent DC chanlist ACDC chanlist HIGH chanlist LOW chanlist MAXimum chanlist MINimum chanlist POWer DC chanlist VOLTage DC chanlist ACDC chanlist HIGH chanlist LOW chanlist MAXimum chanlist MINimum chanlist ARRay CURRent DC chanlist POWer DC chanlist VOLTage DC chanlist OUTPut STATe lt Bool gt NORelay chanlist COUPle STATe lt Bool gt CHANNel lt NR1 gt lt NR1 gt DOFFset lt NRf gt MAX DOFFset DELay FALL lt NRf gt chanlist RISE lt NRf gt chanlist PMODe VOLTage CURRent chanlist TMODe HIGHZ LOWZ chanlist INHibit MODE LATChing LIVE OFF PON STATe RST RCLO Quick Reference 1 Description Returns the instantaneous output current Returns the instantaneous output power Returns the instantaneous output voltage Returns the most recent external data log records Returns data as ASCII or binary Sets the byte order of the external data log data Acquire command only on N676xA N678xA SMU and Option 054 Enables the measurement system to receive triggers Enables external data log measurements Enables the output transient system to receive triggers Enables disables continuous transient triggers Takes a measurement returns the average current Takes a measurement returns the total rms current AC DC Tak
143. no SCPI I O activity on the remote interfaces USB LAN GPIB within the user specified time period Note that the watchdog timer function is NOT reset by activity on the front panel or when using the Web server the outputs will still shut down after the time period has elapsed After the time period has expired the outputs will be disabled but the programmed output state is not changed The PROT bit in the status questionable register as well as the PROT indicator on the front panel will be set The watchdog delay can be programmed from 1 to 3600 seconds in 1 second increments As shipped from the factory the watchdog timer is set to disable the outputs 60 seconds after all lO activity has ceased The watchdog state and delay settings are volatile but can be saved and recalled as part of the instrument state A watchdog protect can be cleared as described under Clear Output Protection Functions 89 4 Operating the Power System Front Panel SCPI Command Select Protect Wdog To enable the output watchdog Check Enable Watchdog to timer enable the watchdog timer OUTP PROT WDOG ON Enter a value in the Watchdog To set the output watchdog timer to Delay box and press Select 600 seconds OUTP PROT WDOG DEL 600 Set the Oscillation Protection This information applies to Keysight Models N678xA SMU only If open sense leads or capacitive loads outside the allowable range cause the output to oscillate the oscillation
144. ns constant while the output voltage changes to accommodate the change in load All DC power modules except for Keysight Models N678xA SMU are designed as constant voltage sources This means that the specifications and operating characteristics are optimized for constant voltage mode operation Note that these power modules cannot be programmed to operate in a specific mode At turn on the operating mode will be determined by the voltage setting current setting andthe load resistance In the following figure operating point 1 is defined by a fixed load line traversing the positive operating quadrant in the constant voltage region Operating point 2 is defined by a fixed load line traversing the positive operating quadrant in the constant current region Voltage Vmax 12 Vset i 2 g7 amp S PS amp NA Downprogrammer ES Is characteristic Q D l i LS l EL Moreload Y Qe e resistance G va RAN yon i 2 I I I I Less load resistance Current 0 Iset Imax 120 Keysight N6700 User s Guide Source Operating Modes Appendix E Autoranging Autoranging only applies to Keysight N675xA and N676xA power modules The following figure illustrates the autoranging output characteristic of the Keysight N675xA and N676xA power modules Point 3 shows a situation in which the voltage and current settings are such that the operating locus is limited b
145. ode program the output current of each output to one half of the total desired output current Set the voltage limit to a value higher than the expected output voltage Effect on Specifications Current Voltage Load Transient Recovery Time Keysight N6700 User s Guide 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 specifications 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 utput 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 o gt Load transient specifications are typically twice the single output 39 2 Installation Series Connections MENNA SHOCK HAZARD Floating voltages must not exceed 240 VDC No output terminal may be more than
146. ode or load inductance in CC mode The delay required must be determined empirically the power module programming response time characteristics may be used as guidelines Note that the time it takes the output to go into CC mode varies depending on the magnitude of the over current condition compared to the current limit setting For example if the over current is only slightly greater than the current limit setting it may take several tens of milliseconds depending on the power module type for the output to set the CC status bit If the over current is significantly greater than the current limit setting it may only take a few milliseconds or less depending on power module type for the output to set the CC status bit To determine when the output will shut down you must add the time it takes for the CC status bit to the over current protection delay time If the over current persists beyond the sum of these two time intervals the output will shut down Couple Output Protection Protection coupling lets you disable all output channels when a protection condition occurs on a single output channel To couple output protection Front Panel SCPI Command Select Protect Couple To enable output protection Check the Enable Coupling box Coupling and press Select OUTP PROT COUP ON Output Watchdog Timer Keysight N6700 User s Guide The output watchdog timer causes all outputs to go into protection mode if there is
147. off delays control the power up and power down sequencing of the output channels in relation to each other Front Panel SCPI Command Press the Channel key to select To program a 50 millisecond turn an output Then select on delay for output 1 and a 100 OutputiSequence Delay millisecond turn on delay for Select either Turn on or Turn off Output 2 Enter a delay in seconds then OUTP DEL RISE 05 1 press Select OUTP DEL RISE 1 2 Select System Preferences Keys To program a 200 millisecond turn Check On Off affects all off delay for outputs 3 and 4 channels OUTP DEL FALL 2 3 4 Output turn on characteristics vary across the power module types DC Power Autoranging Precision and Source Measure When output channels of the same module type are programmed off to on output sequencing is determined by the programmed turn on delays When outputs of different module types are sequenced there may be additional offsets of a few milliseconds from one output to another that must be accounted for Specifying a common delay offset assures that the programmed turn on delays will be synchronized to start at the completion of the common delay offset Select the delay offset of the slowest power module in the mainframe and use that as the common delay offset See Appendix D for more information Front Panel SCPI Command n the front panel menu select To query the delay offset of the Output Sequence C
148. ologies 2006 2015 Edition 8 January 2015 KEYSIGHT AIC TECHNOLOGIES 5969 2937 www keysight com
149. oltage or the output current increases to a point where the module exceeds the power limit setting the module s power limit function will activate If the power limit is left at the maximum rating then the power module will not enable its power limit function On Keysight N673xB N674xB and N677xA power modules the power limit function will turn the output off after a power limit condition persists for about 1 millisecond A status bit CP will indicate that the output has been turned off because of a power limit condition To restore the output you must first adjust the load so that it draws less power Then you must clear the protection function as explained in chapter 4 under Clear Output Protection Functions Note that on these models it may be preferable for some applications to use the current or voltage setting to limit the output power so as to avoid turning the output off On Keysight N675xA and N676xA power modules the power limit function will limit the output power at its programmed setting A status bit CP will indicate that the output is in power limit mode When the power drawn by the load is reduced below the power limit setting the output automatically returns to normal operation either constant voltage or constant current mode Power limiting should not be used when Keysight N673xB N674xB and N677xA power modules are grouped When these power modules are grouped you must reset the power limit to its maxi
150. ouple slowest power module in the The Max delay offset for this frame mainframe the maximum delay field displays the delay offset of offset in seconds the slowest power module in the OUTP COUP MAX DOFF frame Enter this value into the To specify the common delay Delay offset field in milliseconds offset for the mainframe in then press Select seconds OUTP COUP DOFF 051 Program the Output Relays Keysight N6700 User s Guide Output relay availability and options are described in Chapter 1 under odel Differences Option 761 provides double pole double throw relays that disconnect both the output and sense terminals Option 760 is the same as option 761 but adds output reversal relays Note that a small AC network is always present across the output terminals If you have Option 761 installed the normal operating mode of the relay is to open and close as the output is turned on or off The relays are only opened or closed when the output is at a safe state zero voltage zero current Note however that you can program the output state on or off while leaving the relay state unchanged 65 4 Operating the Power System Front Panel SCPI Command Not Available To leave the relays closed when output 1 is turned off OUTP OFF NOR 1 To leave the relays open when output 1 is turned on OUTP ON NOR 1 If you have Option 760 installed you can also reverse the polarity of the output and sense terminals
151. output channel is in constant voltage mode 12 5230V 0 1 89A m cv se BR zo For a description of the status indicators refer to Chapter 1 under Front Panel Display At a Glance Keysight N6700 User s Guide 47 3 Getting Started Using the Front Panel Menu 48 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 Briefly Press Press the ne Press e Menu key to access the command menu e navigation keys to move across the menu commands th th Press the center Sel key to select a command and move down to xt level in the menu th e Help key at the lowest menu level to display help information about the function controls A map of the front panel command structure is found in Chapter 1 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 The over voltage protection function turns off the affected output if the output voltage reaches the programmed over voltage limit Menul Press Menu 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 me nu l
152. ower System Initiate and Trigger the Data Logger 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 command enables the measurement system to receive triggers To initiate and trigger the external data log Front Panel SCPI Command Not Available To initiate data log measurements INIT ELOG 1 To trigger the data logger TRIG ELOG 1 If the trigger source is BUS you can also program TRG or lt GET gt to trigger the data logger When triggered the data logger starts placing data in the internal measurement buffer Because the buffer is only large enough to hold 20 seconds of accumulated measurement your PC application must periodically retrieve or fetch the data from this buffer Periodically Retrieve the Data log Measurement Each FETCh command returns number of requested records of the data in the buffer and removes them making room available for more data The measurement continues until it is aborted Front Panel SCPI Command Not Available To retrieve a maximum of 1000 records FETC ELOG 1000 1 ASCII data the default format is returned as comma separated ASCII numeric data sets of average min max values terminated by a newline ASCII queries can only fetch data from one channel at a time Binary data is returned as a comma separated list of data for each channel requested
153. power system and verify a connection To add the instrument you can request the Connection Expert to discover the instrument If the instrument cannot be found add the instrument using the instrument s hostname or IP address f If this does not work refer to the chapter on Troubleshooting Guidelines in the Keysight Technologies USB LAN GPIB Interfaces Connectivity Guide 52 4 You can now use Interactive IO within the Connection Expert to communicate with your instrument or you can program your instrument using the various programming environments You can also use the Web browser on your computer to communicate with the instrument as described under Using the Web Server later in this chapter Connecting to a Private LAN A private LAN is a network in which LAN enabled instruments and computers are directly connected and not connected to a site LAN Keysight N6700 User s Guide Getting Started 3 They are typically small with no centrally managed resources To Network To LAN Port Interface Card NIC CAT5 Crossover Cable Instrument 1 Ifyou have not already done so install the Keysight lO Libraries Suite from the Automation Ready CD that is shipped with your product 2 Connect the instrument to the computer using a LAN crossover cable Alternatively connect the computer and the instrument to a standalone hub or switch using regular LAN cables Make sure your computer is configured to o
154. pplemental Characteristics N6700B N6701A N6702A Maximum Power Available for Modules sum of total module output power 400 W for N6700B mainframes 600 W for N6701A mainframes 1200 W for N6702A mainframes Internal Flash Memory 8 Mbyte Protection Response Characteristics INH input 5 us from receipt of inhibit to start of shutdown Fault on coupled outputs lt 10 us from receipt of fault to start of shutdown Command Processing Time lt 1 ms from receipt of command to start of output change Digital Control Characteristics Maximum voltage ratings 16 5 VDC 5 VDC between pins pin 8 is internally connected to chassis ground Pins 1 and 2 as FLT output aximum low level output voltage 0 5 V 4 mA aximum low level sink current 4 mA Typical high level leakage current 1 mA 16 5 VDC Pins 1 7 as digital trigger outputs aximum low level output voltage 0 5 V 4 mA pin 8 common V 50 mA 1 75 V 100 mA aximum low level sink current 100 mA Typical high level leakage current 0 8 mA 16 5 VDC Pins 1 7 as digital trigger inputs aximum low level input voltage 0 8 V and pin 3 as INH input inimum high level input voltage 2 V pin 8 common Typical low level current 2 mA O V internal 2 2k pull up Typical high level leakage current 0 12 mA 16 5 VDC Interface Capabilities GPIB SCPI 1993 IEEE 488 2 compliant interfac
155. protection function detects the oscillation and latches the output off The condition is annunciated on the front panel by the OSC status annunciator Front Panel SCPI Command Select Protect OSC To enable oscillation protection for Check the OSC box and output 1 press Select VOLT PROT OSC ON 1 2 Clear Output Protection Functions 90 If an over voltage over current over temperature power fail condition power limit condition protection condition or inhibit signal occurs the power system turns off the affected output channel The appropriate operating status indicator on the 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 output 1 Select the Clear button OUTP PROT CLE 1 Keysight N6700 User s Guide Operating the Power System 4 External Data Logging The external data log function is only available on mainframes with firmware revision D 01 09 and up It cannot be programmed from the front panel The power system has an external data logger ELOG function that lets you log voltage and current measurements from all four outputs directly to an internal FIFO first in first out buffer Note that this buffer is only large enough to hold about 20 seconds of accumulated measurements
156. r Low Profile MPS Mainframe CET o Low Profie es Mainframe E os i 3 r aS Se Keysight N6700B MY43000101 me Hostname A N6700B 00101 usa agilent com Farm SS EE gt EREE D lm ES he So IP Address 141 121 202 235 TCPIPO 4 N67008 00101 INSTR Turn On Front Panel Identification Indicator Advanced Information Use the navigation bar on the left to access your Low Profile MPS Mainframe and related information Click the Web Control button in the navigation bar on the leftto start the application Keysight Technologiesc 2014 3 Click on the Browser Web Control button in the navigation bar on the left to begin controlling your instrument 57 3 Getting Started 58 Using Telnet Using Sockets 4 For additional help about any of the pages click on the Help with this Page button If desired you can control access to the Web server using password protection As shipped from the factory no password is set To set a password click on the View amp Modify Configuration button Refer to the on line help for additional information about setting a password In an MS DOS Command Prompt box type telnet hostname 5024 where hostname is the N6700 hostname or IP address and 5024 is the instrument s telnet port You should get a Telnet session box with a title indicating that you are connected to the power system Type the SCPI commands at the prompt Power system mainframes allow any comb
157. rammed turn on delays This same reference point also makes it possible to connect multiple Keysight N6700 series mainframes together and program accurate turn on sequences across multiple mainframes There is no need to specify a delay offset when outputs turn off Outputs start executing their turn off delays as soon as an output Off command is received For complete details on the SCPI commands discussed in this appendix refer to the N6700 Programmer s Reference Help file included on the Keysight N6700 Product Reference CD This CD ROM is shipped along with your instrument Appendix D Output On Off Synchronization Synchronizing Output Turn on Delays 114 All N6700 Power Modules that are installed in a Keysight N6700 mainframe exhibit a minimum delay offset that applies from the time that a command to turn on the output is received until the output actually turns on If you specify a user programmed turn on delay this delay will be added to the minimum delay offset resulting in a turn on delay that is actually longer than the one you programmed The minimum delay offset is shown as follows Power Modules Options and Mode Delay Offset N673xB N674xB N677xA Without relays 32 ms With relay option 760 58 ms N6751A N6752A Without relays 25 ms With relay option 760 51 ms N6753A N6754A Without relays 18 ms With relay option 760 44 ms N6761A N6762A Voltage Priority without relays 32 ms Voltage Priority with relay option 760
158. ray data without initiating a new measurement Use FETCh queries to return the array data from the last measurement Fetch queries do not alter the data in the measurement buffer The commands are Front Panel SCPI Command Not Available FETC ARR VOLT 1 FETC ARR POW 1 FETC ARR CURR 1 Power can only be measured on power modules with simultaneous measurement capability see chapter 1 Model Differences 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 You can test the MEAS_active bit in the operation status register to know when the measurement has completed as explained in the following section Keysight N6700 User s Guide Operating the Power System 4 Synchronizing Digitizer Measurements Use the measurement trigger system to synchronize the acquisition of measurements with a Bus Transient or an external trigger Then use FETCh commands to return voltage or current information from the acquired data Briefly to make a triggered measurement Select the measurement function to trigger Adjust the measurement to capture pre trigger data Select the trigger source Initiate the trigger system and generate a trigger Fetch the triggered measurements Select the Measurem
159. rfaC E Skrien 59 A 61 Programming the UI Esaiaic nca dedo dela driebciniadaiadabeladietecoiiadintds 62 Sed A ee E 68 Programming Output Li sci ncininnoionacsniiicn stan seaseawaersteaneeatancioninate 72 Makina Measurement sscananona 77 Using lan 0 yo ara OCC 79 Using the Protection FUNCUONS sar 87 Emer Met Data Mis ola Lao AO AAN OO UU oa 91 System Related DRETS td tancia cinco 95 5 A UCD tii ee celal ot alt oa ed la ibe ra cab 99 Keysight N6700B N6701A N6702A MPS Mainframes 100 cs A 103 Digital Control POE 104 Configuring the Digital Control Po nasa 105 C Power ASOMO hs checsextnescssadimnatenansi rapier Aene retida EE 109 Power Omit Operation citrato 110 Module Power AUG CAI My ci ac astteadieatanesieniseeiiuadiveldestiecsaeblasecteadie 111 D Output On Off SY TGP NMA OM cscs dics tsiie ca sduco nia nna talca ca 113 Synchronizing Output Turn on Delays s es 114 Synchronizing Multiple Mainframes cceeeeceeseeseeseeseeteeeeeeeees 117 Operati Olsene aa aa ia NERE ELA ETELE 118 Es So rce Operating MI aiii di ii a Rinit 119 Single Quadrant Operation c oocccncnnnnninnicocnocnocnoncnnnoncnncarcnncnnnn 120 Keysight N678xA Multi Quadrant Operation eee 122 Updates This manual describes firmware revision D 03 08 and up Go to http www keysight com find N6700firmware if you need to download this or any later versions of the firmware Information on how to install the firmware is available on th
160. rument cannot be found add the instrument using the instrument s hostname or IP address If this does not work refer to the chapter on Troubleshooting Guidelines in the Keysight Technologies USB LAN GPIB Interfaces Connectivity Guide Keysight N6700 User s Guide 5 You can now use Interactive lO within the Connection Expert to communicate with your instrument or you can program your instrument using the various programming environments You can also use the Web browser on your computer to communicate with the instrument as described under Using the Web Server later in this chapter 53 3 Getting Started 54 Viewing the Active LAN Settings To view the currently active LAN settings press the Menu key then use the navigation keys to select System lIO LAN ActiveSettings The currently active settings for the IP Address Subnet Mask and Default Gateway may be different from the front panel configuration menu settings depending on the configuration of the network If the settings are different it is because the network has automatically assigned its own settings Modifying the LAN Settings The power system must be rebooted for any LAN setting modifications to take effect Automatic Manual IP Address Subnet Mask Default Gateway As shipped from the factory the power system s pre configured settings should work in most LAN environments If you need to manually configure these
161. serseeesrees 95 This chapter contains examples on how to operate your power system from the front panel and over the remote interface using SCPI commands For complete details on the SCPI Standard Commands for Programmable Instruments commands refer to the Programmer s Reference Help file included on the Keysight N6700 Product Reference CD This CD ROM is shipped along with your instrument The simple examples discussed in this chapter show you how to program Output voltage and current functions Output triggers Measurement functions Measurement triggers Protection functions System functions Refer to Appendix B for information about using the Digital Port on the back of your instrument Refer to Appendix C for information about using the power allocation function 4 Operating the Power System Programming the Output 62 Select a Channel View Front Panel Press the Meter key to toggle between single channel and multiple channel view Select an Output Channel Front Panel Press the Channel key to select an output channel Set the Output Voltage Front Panel Press the Voltage key Enter a value and press Select SCPI Command To select single channel view DISP VIEW METER1 To set multiple channel view DISP VIEW METER4 SCPI Command Enter the selected channel s in the command s parameter list OUTP STAT 41 2 SCPI Command To set output 1 to
162. t 1 select one of the output channels where n is the output channel that will generate the trigger signal Front Panel To select Bus triggers select Initiate the Transient Trigger System Keysight N6700 User s Guide 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 to the initiated state which enables the power system to receive triggers To initiate the trigger system use SCPI Command To initiate the transient trigger system INIT TRAN 1 Front Panel Select the Transient Control Scroll to Initiate and press Select It takes a few milliseconds for the instrument to be ready to receive a trigger signal after receiving the INITiate TRANsient command 69 4 Operating the Power System If a trigger occurs before the trigger system is ready for it the trigger will be ignored You can test the WTG_tran bit in the operation status register to know when the instrument is ready to receive a trigger after being initiated Front Panel SCPI Command Not Available To query the WTG_tran bit bit 4 STAT OPER COND 1 If a bit value of 16 is returned in the query the WTG_tran bit is true and the instrument is ready to receive the trigger signal Refer to the N6
163. t IP address is on a different subnet all packets must be sent to the Default Gateway This value is the IP Address of the default gateway that allows the instrument to communicate with systems that are not on the local subnet as determined by the subnet mask setting A value of 0 0 0 0 indicates that no default gateway is defined Keysight N6700 User s Guide Host name Use Dynamic DNS naming service Use NetBIOS naming service Domain name Obtain DNS server from DHCP Use the following DNS server DNS Server Keysight N6700 User s Guide Getting Started 3 Name Select Name to configure the hostname of the instrument If you want to change the hostname you should do so before you connect the instrument to the network Otherwise the original hostname may be cached in the network for up to several hours This field registers the supplied name with the selected naming ervice If the field is left blank no name is registered A hostname may contain upper and lower case letters numbers and dashes The maximum length is 15 characters 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 n Each power system is shipped with a default hostname with the format A modelnumber serialnumber where modelnumber is the mainframe s 6 character model
164. t secure way of locking the front panel keys because you need a password to unlock the front panel The lockout setting is saved in non volatile memory so that the front panel remains locked even after AC power is cycled Front Panel SCPI Command Select System Preferences Lock Not Available In the dialog box enter the password to unlock the front panel Then select Lock The menu to unlock the front panel appears every time a key is pressed Enter the password to unlock the front panel If the password is lost the SYSTem PASSword FPANel RESet command can reset the front panel lockout password Refer to the Programmer s Reference Help file on your Keysight N6700 Product Reference CD for more information The SYSTem COMMunicate RLSTate RWLock command can also lock and unlock the front panel This command is completely independent of the front panel lockout function If you use this command to lock the front panel the front panel will be unlocked when AC power is cycled Keys You can enable or disable the front panel key clicks Front Panel SCPI Command Select System Preferences Keys Not Available Check Enable key clicks to enable key clicks Uncheck to disable key clicks You can configure the On Off key to enable or disable ALL outputs Front Panel SCPI Command Select SystemWPreferences Keys Not Available Check On Off key affects all channels The ON Off key will now be active on ALL channels 97
165. te a trigger out signal See Generate 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 ACQ SOUR BUS 1 To select a Digital pin as the trigger TRIG ACQ SOUR PIN lt n gt 1 To select a Transient output as trigger TRIG ACQ SOUR TRAN lt n gt 1 where n is the output channel that will generate the trigger signal Keysight N6700 User s Guide Operating the Power System 4 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 trigger system to receive triggers To initiate the trigger system use Front Panel SCPI Command Not Available To initiate the measurement trigger system INIT ACO 1 It takes a few milliseconds for the instrument to be ready to receive a trigger signal after receiving the INITiate ACQuire command and it can take longer for Keysight Models N678xA SMU If a trigger occurs before the trigger system is ready for it the trigger will be ignored You can test the WTG_meas bit in the operation status register to know when the instrument is ready to receive a trigger after being initiated
166. that a power fail condition on the AC mains has disabled the output CP indicates that a positive power limit condition has disabled the output This protection function does not apply to all power modules Refer to Appendix C for further information CP indicates that a negative power limit condition has disabled the output This protection function does not apply to all power modules Refer to Appendix C for further information Prot indicates that the output is disabled either because of a coupled protection signal from another output or because the programmed output watchdog time has expired The Inhibit input pin 3 on the rear panel digital connector can be programmed to act as an external shutdown signal Refer to Appendix B for further information Set the Over Voltage Protection Keysight N6700 User s Guide The over voltage protection function turns off the affected output if the output voltage reaches the programmed over voltage limit The OVP circuit monitors the voltage at the and output terminals However on Keysight Models N678xA SMU and units with Option J01 the voltage is monitored at the and sense terminals This allows for more precise over voltage monitoring directly at the load Units with Option J01 have tracking OVP in addition to the standard overvoltage protection It lets you set an overvoltage protection limit that is offset from the programmed voltage The tracking OVP threshold automatically trac
167. the negative over voltage protection OC the output is disabled by the over current protection OT the over temperature protection has tripped PF the output is disabled by a power fail condition OSC the output is disabled by the oscillation protection INH the output is disabled by an external inhibit signal UNR the output is unregulated PROT the output is disabled by a condition from a coupled 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 a o 6 O a The Arrow keys let you move around in the command menus The Select key lets you make a selection in the command menus It also lets you enter edit mode for numeric parameters Output keys On Off 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 setting of the selected channel Number keys 7 8 9 t 4 5 6 4 1 2 3 E Enter Keysight N6700 User s Guide The O t
168. tion Positive and Negative Voltages Either positive or negative voltages with respect to ground 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 Keysight Models N678xA SMU are optimized for grounding the negative output terminal Grounding the positive terminal may result in increased current measurement noise and a reduction in current measurement accuracy Protecting Sensitive Loads from AC Power Switching Transients This only applies if you are connecting loads that are highly sensitive to voltage or current transients to the output of the power system If your load is connected directly to the output of the power system and is not connected to chassis ground in any way you do not need to worry about AC power switching transients appearing at the output of the power system Operating the AC line switch can inject common mode current spikes into the DC output leads resulting in voltage spikes that may damage loads that are highly sensitive to voltage or current transients Note that any electronic device meeting international standards for EMI compliance is likely to generate similar current spikes This situation arises from the presence of EMI filters at both the AC input and t
169. tiple measurement ranges Selecting a lower measurement range provides greater measurement accuracy provided that the measurement does not exceed the range To select lower measurement ranges use Front Panel SCPI Command Select Measure Range To set the 5 V measurement range Select the lower measurement SENS VOLT RANG 5 1 range from the voltage or To set the 1 Ameasurement range current dropdown menu Then SENS CURR RANG 1 1 press Select 79 4 Operating the Power System 80 Seamless Measurements Seamless voltage and current measurement autoranging is available on Keysight Models N6781A N6782A N6785A and N6786A This enables a wide dynamic measurement range with no data lost across ranges Autoranging does not include the 10 pA range which must be selected manually Front Panel SCPI Command Select Measure Range To enable seamless voltage or current Select Auto from the voltage autoranging on channel 1 or current dropdown menu SENS VOLT RANG AUTO ON 1 Then press Select SENS CURR RANG AUTO ON 1 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 POINT lt TIME INTERVAL BETWEEN SAMPLES gt AX O ACQUISITION TIME TIME INTERVAL X SAMPLES 1 You can vary the measurement data sampling r
170. ut 1 use Select the List Step number and LIST VOLT 9 0 6 0 3 0 1 enter a voltage value Press Select Repeat this for each step Use the t Y keys to select the next step 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 Sy Oy Spe clips O 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 Y 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 ist 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 75 4 Operating the Power System 76 Step 5 Front Panel SCPI Command Select Transient List Pace LIST STEP AUTO 1 Select Dwell paced Press Select 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
171. with each step determines the minimum time that the 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 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 SCPI Command Select Transient List Config To program a trigger at the start of Select the List Step number step 4 for output 1 use To generate a trigger enter a 1 in LIST TOUT BOST 0 0 0 0 1 0 the Tout Begin Step or Tout End E Step field If a zero is entered no TO program a trigger at the end of trigger is generated for the step Step 0 2 and 4 for output 1 use Repeat this for each step Use the P13T TOUT EOST 1 0 1 0 1 0 Step 6 Step 7 Step 8 1 t Y keys to select the next step ce X al Vol H 2 3 4 5 0 1 2 3 4 5 Trigger at BOST Trigger at EOST Specify how you want the list to terminate For example if you want the list to remain at the values of the last list step when finished use Front Panel SCPI Command Select Transient List Terminate To program output 1 use Select Stop Last Step Press Select LIST TERM LAST 1 1 If applicable specify how many times you want the list to repeat Sending the INFinit
172. xiliary measurement terminals are connected 78 Keysight N6700 User s Guide Using the Digitizer Operating the Power System 4 The Digitizer functions described in this section are not available on all models Refer to the Test Extensions feature under Model Differences in chapter 1 The digitizer function lets you access the enhanced voltage and current measurement capabilities of the power system You can Specify a measurement function and range Adjust the measurement sample rate Select a measurement window that can attenuate AC noise Retrieve arrays of the digitized current or voltage measurement Synchronize measurements using trigger signals When a remote interface measurement is in progress the front panel display may indicate Front panel measurements resume when the remote measurement completes Programming the Digitizer Keysight N6700 User s Guide Select the Measurement Function and Range The following commands select a measurement function To enable the measurement function use Front Panel SCPI Command Not Available To enable voltage measurements SENS FUNC VOLT ON 1 To enable current measurements SENS FUNC CURR ON 2 lf a power module has simultaneous measurements see chapter 1 Model Differences you can enable BOTH voltage and current measurements on the same output channel Some power modules also have mul
173. xternal load With tracking enabled the negative current limit tracks the positive current limit setting With tracking disabled you can set different values for the positive and negative current limits The following figure shows the voltage priority operating locus of the power modules The area in the white quadrants shows the output as a source sourcing power The area in the shaded quadrants shows the output as a load sinking power Voltage 20 V OV 6V yaz y De V setting i 8A 3A 1A l Current 8 A 3 A I limit l limit 1A Voltage operation applies to N6784A only Z 20 V OV Key 6 V Sourcing power Sinking power gt Programmable The heavy solid line illustrates the locus of possible operating points as a function of the output load As shown by the horizontal portion of the line the output voltage remains regulated at its programmed setting as long as the load current remains within the positive or negative current limit setting A CV constant voltage status flag indicates that the output current is within the limit settings Keysight N6700 User s Guide Source Operating Modes Appendix E When the output current reaches either the positive or negative current limit the unit no longer operates in constant voltage mode and the output voltage is no longer held constant Instead the power supply will now regulate the output current at
174. y parameter in the SCPI command makes the list repeat indefinitely At reset the list count is set to 1 Front Panel SCPI Command Select the Transient List Repeat To program the output 1 list to Enter the number of list repetitions repeat 2 times use 2 and Press Select LIST COUN 2 1 Select a trigger source initiate and trigger the list This is described in detail under Synchronizing Output Steps Keysight N6700 User s Guide Making Measurements Operating the Power System 4 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 time interval is 20 48 microseconds The output window function is Rectangular Use the following commands to make a simple measurement Front Panel SCPI Command Select the Meter key To measure average voltage or current MEAS VOLT 1 MEAS CURR 1 Measurement Ranges Keysight N6700 User s Guide Some models have multiple voltage and current measurement ranges Refer to Chapter 1 Model Differences Selecting a lower measurement range provides greater measurement accuracy provided the measurement does not exceed the range Front Panel SCPI Command Select Measure Range To set the 5 V measurement range Select the lower measurement SENS VOLT RANG 5 1 ra
175. y the analog performance of the output circuit The slowest or minimum slew rate is model dependent and is a function of the full scale range For other ranges the minimum slew rate is proportional to the full scale range The current slew rate control is only available on Keysight Models N678xA SMU It determines the rate at which the current changes to a new programmed setting When set to MAXimum INFinity or to a very large value the slew rate will be limited by the analog performance of the output circuit The slowest or minimum slew rate is model dependent and is a function of the full scale range For other ranges the minimum slew rate is proportional to the full scale range Enable the Output Front Panel SCPI Command Press the On Off key To enable only output 1 To enable disable ALL outputs OUTP ON 1 using the On Off key select To enable outputs 1 4 System Preferences Keys OUTP ON 1 4 Check On Off affects all channels Because of internal circuit start up procedures and any installed relay 64 options output on may take between 35 and 50 milliseconds to complete its function Conversely output off may take between 20 and 25 milliseconds to complete its function To mitigate these built in delays you can program the output to zero volts rather than using the output on off function Keysight N6700 User s Guide Operating the Power System 4 Sequence Multiple Outputs Turn on and turn
176. y the maximum output power boundary of the output Depending on the power module this may be greater than the output power rating of the module In this situation the output is not guaranteed to meet its operating specifications because it is operating in an area that is outside its specified power rating Voltage Vmax Veet th boos bee koe Sus l l Downprogrammer characteristic I I More load x resistance S Less load resistance Current 0 Iset Imax Downprogramming As shown by the dashed line on the left in the figures the power system is capable of sinking current over the output voltage range from zero volts to the rated voltage This negative current sinking capability provides fast downprogramming of the output The negative current is not programmable Keysight N6700 User s Guide 121 Appendix E Source Operating Modes Keysight N678xA Multi Quadrant Operation 122 Keysight Models N678xA SMU can be operated in either voltage or current priority mode They can source as well as sink output power Note that Keysight Models N6781A N6782A N6785A and N6786A operate only in the Voltage quadrants Voltage Priority Mode In voltage priority mode the output voltage should be programmed to the desired positive or negative value A positive current limit value should also be set The current limit should always be set higher than the actual output current requirement of the e
177. ysight Technologies Representative Keysight N6700 User s Guide Contents 1 Quick Reference 2 Installation A 3 Getting Started 4 Operating the Power System Keysight N6700 User s Guide idilio 7 The Keysight N6700 Modular Power System At a Glance 8 The Front Panel ANC atacada 11 The Rear Panel Ata UI 11 Front Panel Display At a Glance conncnccicninniocionnonconconcnnconanncncno 12 Front Panel Keys At a Glance ooocococonnonconnnocnonnonncnncnncnnonccnncnnonos 13 Front Panel Men Rda didacticas 14 SCPI Command SUMMARY recia 16 E E N A EE A 23 General A 24 Inspecting the TUE siscetetadeaatecetetateietsseletateeetecetetateietvseletatastseteiates 20 Installing the Uan sli 26 Connecting the Line Old ccoo 30 Connecting the OUTPUTS ntsc 31 Remote Sense CONNECTIONS siii 36 Parallel Connections AAA EF Oo PP 38 Series Connections Sn 40 Agqditional Load Considera tons cta 42 Connecting the Auxiliary Voltage Measurement Input 44 irte 45 Turning the Unit ON ooncciniiniociocinnnonconnon non nonon nn nono rca 46 Selecting an Output ChaMMBlinicccccocccnicnocnocnonconconconnonconcarcnncino 46 Entering an Output Voltage Setting wateciietisinceticactstdiensteatescntcaiiaaes 46 Entering a amp Current LESS sosa 47 Enabling Ee UTIL tus is one eine metre 47 Using the Front Panel MENU ao 48 Comectna tothe MSCS sssi aa 50 Comm nicating Over the LAN etciataiaiaa 57 Sec ring the IMe

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