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Installation 2

Keysight N6700 User’s Guide

35

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.

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.

+S + -S

LOAD

LOAD

+

+

SENSE JUMPERS

INSTALLED FOR

LOCAL SENSING

+

TWIST

LEADS

LOAD

+

50 A
CONNECTOR

12A & 20 A
CONNECTOR

+S +LS -LS -S

SENSE
JUMPERS
INSTALLED
FOR LOCAL
SENSING

50A SENSE

-

LOAD

+

-

- - G

+ + +

S

G

-

S

TWIST

LEADS

8A CONNECTOR

LOAD

+

LOAD

-

-

+

«
...
33
34
35
36
37
...
»

Summary of Contents for N6700

Page 1: ...User s Guide Keysight Series N6700 Low Profile Modular Power System ...

Page 2: ... 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 product for more information Certification Keysight Technologies certifies that this product met...

Page 3: ...alified 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 t...

Page 4: ...ow 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 seque...

Page 5: ...llel Connections 38 Series Connections 40 Additional Load Considerations 42 Connecting the Auxiliary Voltage Measurement Input 44 3 Getting Started 45 Turning the Unit On 46 Selecting an Output Channel 46 Entering an Output Voltage Setting 46 Entering a Current Limit Setting 47 Enabling the Output 47 Using the Front Panel Menu 48 Connecting to the Interfaces 50 Communicating Over the LAN 57 Securi...

Page 6: ...ce Operating Modes 119 Single Quadrant Operation 120 Keysight N678xA Multi Quadrant Operation 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 the web site Refer to Instrument Identification in chapter 4 to vi...

Page 7: ...apter 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...

Page 8: ...ly digitize voltage and current and capture those measurements into an oscilloscope like data buffer The N678xA Source 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 wat...

Page 9: ...eamless measurement autoranging Available on Keysight N6781A N6782A N6785A and N6786A SMU power modules Output measurements seamlessly autorange between ranges however the 10 μA current range must be selected manually Microampere current measurements Available on Keysight N6761A N6762A and N678xA SMU power modules Current measurement can be made as low as 1 μA in the 10 μA range Fast digitizing Av...

Page 10: ...es 2 channel locations N6753A N6756A N6763A N6766A Feature Source Measure Units SMU Application Specific available N6781A N6782A N6784A N6785A N6786A N6783A BAT N6783A MFG Output rating 20 W 20 W 20 W 80 W 80 W 24 W 18 W 2 quadrant operation 4 quadrant operation Auxiliary voltage measurement input Output disconnect relays Option 761 Option 761 Negative voltage protection Voltage or current priorit...

Page 11: ...een single channel and multiple channel view Access front panel command menu Select an output channel to control Numeric entry keys Enter values Arrow keys increment or decrement voltage and current settings The Rear Panel At a Glance GPIB connector Chassis ground binding post 3 pin IEC 320 AC input connector Power cord requires ground conductor s s s s s s s s 1 2 3 4 5 6 7 Output connector Inclu...

Page 12: ...ted channel is the active channel Grouped channel view Channels 2 through 4 are connected in parallel and have been configured or grouped to act as a single higher power channel Refer to Chapter 4 under System Related Operations for more information 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 th...

Page 13: ...ccesses 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 Sel 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 e...

Page 14: ...ment 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 conti...

Page 15: ...at are connected in parallel Preferences Display Contrast Configures the display contrast Saver Configures the screen saver and wake on I O timer 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 Ca...

Page 16: ...6785A SAVE Saves the new cal constants in non volatile memory STATE Bool NRf Enables disables calibration mode VOLTage LEVel NRf channel Calibrates the output voltage programming CMRR channel Calibrates common mode rejection ratio only N675xA N676xA LIMit POSitive NRf channel Calibrates the positive voltage limit only on N678xA SMU MEASure NRf channel Calibrates the voltage measurement AUXiliary c...

Page 17: ... the average output power VOLTage DC chanlist Takes a measurement returns the average voltage ACDC chanlist Takes a measurement returns the total rms voltage AC DC HIGH chanlist Takes a measurement returns the high level of a voltage pulse LOW chanlist Takes a measurement returns the low level of a voltage pulse MAXimum chanlist Takes a measurement returns the maximum voltage MINimum chanlist Take...

Page 18: ... VOLTage DC RANGe UPPer NRf chanlist Sets the external data log voltage range AUTO Bool chanlist Enables disables measurement autoranging N6781A N6782A FUNCtion VOLTage CURRent NONE chanlist Selects the measurement function for backward compatibility CURRent Bool chanlist Enables disables current measurements replaces FUNCtion VOLTage Bool chanlist Enables disables voltage measurements replaces FU...

Page 19: ...inity chanlist Sets the list repeat count CURRent LEVel NRf NRf chanlist Sets the current list POINts chanlist Returns the number of current list points DWELl NRf NRf chanlist Sets the list of dwell times POINts chanlist Returns the number of dwell list points STEP ONCE AUTO chanlist Specifies how the list responds to triggers TERMinate LAST Bool chanlist Sets the list termination mode TOUTput BOS...

Page 20: ...ion NRf chanlist Sets the Positive transition filter PRESet Presets all enable and transition registers to power on QUEStionable EVENt chanlist Returns the value of the questionable event register CONDition chanlist Returns the value of the questionable condition register ENABle NRf chanlist Enables specific bits in the Event register NTRansition NRf chanlist Sets the Negative transition filter PT...

Page 21: ...ta log trigger source TRANsient IMMediate chanlist Triggers the output immediately SOURce BUS EXTernal IMMediate PIN 1 7 TRANsient 1 4 chanlist Sets the output trigger source Common Commands Command Description Command Description CLS Clear status RDT Return output channel descriptions ESE NRf Standard event status enable RST Reset ESR Return event status register SAV NRf Saves an instrument state...

Page 22: ...ES20 INIT CONT TRAN OFF SENS VOLT RANG MAX LIST COUN 1 SENS VOLT RANG AUTO OFF LIST CURR MIN SENS WIND RECT LIST DWEL 0 001 STEP TOUT FALSE LIST STEP AUTO TRIG ACQ CURR MIN LIST TERM LAST OFF TRIG ACQ CURR SLOP POS LIST TOUT BOST OFF TRIG ACQ SOUR BUS LIST TOUT EOST OFF TRIG ACQ TOUT OFF LIST VOLT MIN TRIG ACQ VOLT MIN OUTP OFF TRIG ACQ VOLT SLOP POS OUTP COUP OFF TRIG ELOG SOUR BUS OUTP DEL FALL ...

Page 23: ...iscusses 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...

Page 24: ...Options Mainframe Options Description 0L1 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 digitiz...

Page 25: ...ne 50 A 2 pin connector plug for connecting power leads Only used in N6753A N6755A N6763A N6765A Keysight 1253 7187 Molex 39422 0002 AUX Measurement connector plug A 2 pin connector plug for connecting the auxiliary measurement inputs Only used in N6781A and N6785A Keysight 1253 8485 Phoenix Contact FMC 1 5 2 ST 3 5 Small Sense Jumpers Two small jumpers for local sensing at the output connector Us...

Page 26: ... 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 Cleaning WARNING 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 ...

Page 27: ...ystem 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 Tools required T10 Torx driver Small flat blade screwdriver 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 informatio...

Page 28: ...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 th...

Page 29: ... 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 clearan...

Page 30: ...put 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...

Page 31: ...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 A and 50 A 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 Item...

Page 32: ...itive 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 for stranded copper wire Resistance Max Length to Limit Voltage to 1 V Lead for 5 A for 10 A for 20A for 50 A AWG 2 wires bundled 4 wires bundled Ω foot Wire length in feet 20 7 8 6 9 0 0102 20 x x x 18 14 5 12 8 0 0064 3...

Page 33: ...0 6 to 3 m 10 ohm coaxial inductance per cable foot 32 nH 8 5 to 33 ft 2 to 10 m High Bandwidth Modes with Remote Sensing The following 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 1 Load wires must be twisted pair or coax and must not be tw...

Page 34: ...he 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 μA Without a guard leakage currents in the test circuit could affect the accuracy of the micro amp measurements Guarding is gen...

Page 35: ...s 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...

Page 36: ...to reduce lead inductance and noise pickup Keep load leads under 14 7 meters 50 feet per lead because of inductance effects 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 lea...

Page 37: ...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 Considerat...

Page 38: ...allel The figure on the left illustrates local sensing If voltage drop in the load leads is a concern the figure on the right shows how to connect the sense leads directly at the load Note that in both cases the remote sense terminals must be connected The following figure shows the connections for 50A power modules OUTPUT 2 OUTPUT 1 S S LOAD S S WITH LOCAL SENSING OUTPUT 1 S S OUTPUT 2 S S WITH R...

Page 39: ... Specifications 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 coef...

Page 40: ...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 sh...

Page 41: ...g 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 progra...

Page 42: ... in increased current measurement noise and a reduction in current measurement accuracy Protecting Sensitive Loads from AC Power Switching Transients NOTE 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 groun...

Page 43: ...ent path This ferrite core is now installed inside N6701A and N6702A mainframes 2 Install a 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...

Page 44: ... 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 CAUTION When using the aux...

Page 45: ...ur 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 NOTE Detailed information on configuring the remote interfaces is included in t...

Page 46: ... Voltage Setting Method 1 Use the Navigation and Arrow Keys Navigation Keys Sel Use the left and right navigation keys to navigate to the setting that you wish to change In the display below channel 1 s voltage setting is selected Enter a value using the numeric keypad Then press Enter Arrow Keys You can also use the arrow keys to adjust the value up or down and switch between and limits on Model ...

Page 47: ...ed 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 NOTE 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...

Page 48: ...urns off the affected output if the output voltage reaches the programmed over voltage limit Menu 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 menu level In this case the top ...

Page 49: ...rn to the metering screen This is the quickest way to return to metering mode Back 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 fo...

Page 50: ...rfaces 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 instrument to the General Purpose Interface Bus GPIB The following figure illustrates a typical GPIB interface system 1 If you have not already done so install the Keysight IO Libraries Suite from the Automation Ready CD that is shippe...

Page 51: ...ysight 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 ...

Page 52: ...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 power system and verify a connection To add the instrument you can request the Connection Expert to d...

Page 53: ...ost Keysight products and most computers will automatically choose an IP 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 NOTE Turning off DHCP reduces the time required to fully configure a network connection wh...

Page 54: ...ressing 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 AutoIP AutoIP automatically assigns an IP address Subnet Mask and Default Gateway a...

Page 55: ... a hostname Use Dynamic DNS naming service Registers the hostname using the Dynamic DNS naming system Use NetBIOS naming service 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 Domain name Registers the Internet domain for the instrument The Domain must start with ...

Page 56: ...strument 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 TCP keepalive timeout 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 applica...

Page 57: ...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 NOTE 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 Ru...

Page 58: ...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 sendin...

Page 59: ...ory the Admin menu password is 0 zero This means that you do not have to enter a password to access the Admin menu Simply select 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 ri...

Page 60: ...name A N67xxx xxxxx Ping server Enabled Web password Blank Other factory shipped non volatile settings Admin Calibration password 0 zero On Off key affects all channels Disabled 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 En...

Page 61: ...etails 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 ...

Page 62: ...ou need better output resolution Front Panel SCPI Command Press the Voltage key Select a lower range and press Select 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 r...

Page 63: ...nd Press the Current key Specify a Current limit and or a Current limit and press Select Check the Tracking box if you want the limit to track the limit To select the current limit CURR LIM 5 1 To select the negative current limit CURR LIM NEG 3 1 To enable current limit tracking CURR LIM COUP ON 1 Set the Output Mode NOTE This information applies to Keysight Models N678xA SMU only For Keysight Mo...

Page 64: ...ircuit 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...

Page 65: ...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 In the front panel menu select Output Sequence Couple The Max delay offset for this frame field displays the delay offset of the slowest power module in the frame ...

Page 66: ...to normal OUTP REL POL NORM 1 NOTE When the output polarity has been reversed the voltage meter on the front panel display will show a bar over the voltage reading Set the Output Resistance NOTE 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 progr...

Page 67: ... 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 Output Advanced Bandwidth Select a bandwidth from the selections listed and press Select To select the bandwidth VOLT BWID HIGH1 1 Set the Output Turn Off Mode NOTE This information applies to Keysight Models N678xA SMU o...

Page 68: ...to Step For current step triggering set the Current mode to Step Then press Select To enable the voltage function on output 1 to respond to triggers use VOLT MODE STEP 1 To enable the current function on output 1 to respond to triggers use CURR MODE STEP 1 NOTE In Step mode the triggered value becomes the immediate value when the trigger is received In Fixed mode trigger signals are ignored the im...

Page 69: ...ont Panel SCPI Command To select Bus triggers select Transient TrigSource Select Bus To select Digital pin triggers select Transient TrigSource Then select one of the digital port pins To select Transient output triggers select Transient TrigSource Then select one of the output channels To select Bus triggers for output 1 TRIG TRAN SOUR BUS 1 To select Digital pin triggers TRIG TRAN SOUR PIN n 1 w...

Page 70: ... Transient Control Select Trigger to generate an immediate trigger signal regardless of the trigger source setting To generate an immediate trigger on channel 1 TRIG TRAN 1 Alternatively if the trigger source is BUS you can also program a TRG or an IEEE 488 get command As previously discussed a trigger can also be generated by another output channel or by a trigger signal applied to an input pin o...

Page 71: ...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 an output Step occurs Front Panel SCPI Command Use the Channel key to select the c...

Page 72: ...igger 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 trigge...

Page 73: ...t Step 0 and Press Select To program output 1 use LIST VOLT 15 1 LIST DWEL 1 1 Step 3 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 Select Dwell and press Select LIST STEP AUTO 1 If you only wish to program a single pulse skip steps 4 and 5 and go to step 6 Step 4 If you want to generate a puls...

Page 74: ...EOST 1 0 1 You must program a value of 0 no trigger for step 1 as a placeholder Step 7 Specify the output state after the pulse has completed For example to return the output to the state it was in before the pulse use Front Panel SCPI Command Select Transient List Terminate Select Return to Start Press Select To program output 1 use LIST TERM LAST 0 1 Step 8 Select the trigger source that will ge...

Page 75: ...alue Press Select Repeat this for each step Use the keys to select the next step To program output 1 use LIST VOLT 9 0 6 0 3 0 1 Step 3 Determine the time interval in seconds that the output remains at each step in the list before it advances to the next step To specify the six dwell intervals in the figure a list may include the following values 2 3 5 3 7 3 Front Panel SCPI Command Select Transie...

Page 76: ...Step field If a zero is entered no trigger is generated for the step Repeat this for each step Use the keys to select the next step To program a trigger at the start of step 4 for output 1 use LIST TOUT BOST 0 0 0 0 1 0 1 To program a trigger at the end of step 0 2 and 4 for output 1 use LIST TOUT EOST 1 0 1 0 1 0 1 Step 6 Specify how you want the list to terminate For example if you want the list...

Page 77: ...t the lower measurement range from the voltage or current dropdown menu Then press Select To set the 5 V measurement range SENS VOLT RANG 5 1 To set the 1 A measurement range SENS CURR RANG 1 1 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 prog...

Page 78: ...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 sen...

Page 79: ...easurement completes Programming the Digitizer 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 If a power module has simultaneous measurements see chapter 1 Model Difference...

Page 80: ...f points and press Select Scroll to Time Interval enter a value and press Select To set the time interval to 60µs with 4096 samples use SENS SWE TINT 60E 6 1 SENS SWE POIN 4096 1 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 f...

Page 81: ...culates 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 ...

Page 82: ...ARR POW 1 MEAS ARR CURR 1 Retrieve array data Once a measurement finishes you may wish to retrieve the array data without initiating a new measurement Use FETCh queries to return the array data from the last 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 ...

Page 83: ...e 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 ...

Page 84: ...ediate trigger regardless of the trigger source Unless you are using a TRIGger ACQuire command to trigger the measurement select a trigger source from the following Bus Selects GPIB device trigger TRG or GET Group Execute Trigger External Selects any pin configured as a trigger input as the trigger source Pin n Selects a pin on the external port connector as the trigger source n specifies the pin ...

Page 85: ...after being initiated 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 NOTE It will be necessary to initiate the measurement trigger system each time a triggere...

Page 86: ...CURR LOW 1 To return the maximum value FETC VOLT MAX 1 FETC CURR MAX 1 To return the minimum value FETC VOLT MIN 1 FETC CURR MIN 1 To return power FETC POW 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 finished the response will be delayed until the measurement trigger occurs...

Page 87: ...tion on the AC mains has disabled the output CP 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 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 i...

Page 88: ...C 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 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 nuisa...

Page 89: ... 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 Check the Enable Coupling box and press Select To enable output protection coupling OUTP PROT COUP ON Output Watchdog Timer The o...

Page 90: ... The condition is annunciated on the front panel by the OSC status annunciator Front Panel SCPI Command Select Protect OSC Check the OSC box and press Select To enable oscillation protection for output 1 VOLT PROT OSC ON 1 2 Clear Output Protection Functions If an over voltage over current over temperature power fail condition power limit condition protection condition or inhibit signal occurs the...

Page 91: ...m overflowing The computer needs to provide the data storage function Measurement resources Run independently on each output Some outputs can be running an external data log while the remaining outputs can be used in front panel control or used for other SCPI functions Measurement functions If a power module has only one measurement converter then either voltage or current but not both can be logg...

Page 92: ...cross ranges Autoranging does not include the 10 μA 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 The integration period can be set from a minimum of 102 4 microseconds to a maximum of 60 seconds Front Panel SCPI Command Not Available To set ...

Page 93: ...ypically 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 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 BUS Selects GPIB device trig...

Page 94: ...ed 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...

Page 95: ...alled options voltage current and power rating Front Panel SCPI Command Select System About Frame or Select System About Module IDN SYST CHAN MOD 1 SYST CHAN OPT 1 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 be overwritte...

Page 96: ...erload 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 module...

Page 97: ...ssword 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 l...

Page 98: ...mote 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 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...

Page 99: ...ted but are descriptions of performance determined either by design or type testing All supplemental characteristics are typical unless otherwise noted NOTE 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 C...

Page 100: ...akage current 1 mA 16 5 VDC Maximum low level output voltage 0 5 V 4 mA 1 V 50 mA 1 75 V 100 mA Maximum low level sink current 100 mA Typical high level leakage current 0 8 mA 16 5 VDC Maximum low level input voltage 0 8 V Minimum high level input voltage 2 V Typical low level current 2 mA 0 V internal 2 2k pull up Typical high level leakage current 0 12 mA 16 5 VDC Interface Capabilities GPIB LXI...

Page 101: ...ote When using the AUX measurement input terminals on Models N6781A and N6785A no output or input terminal may be more than 60 VDC from any other terminal or chassis ground AC Input Input Ratings Power Consumption Power Factor NOTE 1 Fuse 100 VAC 240 VAC 50 60 400Hz 1000 VA N6700B 1440 VA N6701A 1440 VA N6702A 180 VAC input 2200 VA N6702A 180 VAC input 0 99 nominal input and rated power Internal f...

Page 102: ...Appendix A Specifications 102 Keysight N6700 User s Guide Outline Diagram ...

Page 103: ...igurable 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 NOTE Earlier Keysight N6700A mainframes use a 4 pin connector instead of the 8 pin connector available on the N6700B N6701A and N6702A mainframes Refer to the Service Guide for information on pin functionality ...

Page 104: ...ribes 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 Pin 8 In addition to the...

Page 105: ...In the Polarity field select either Positive or Negative To send data to the pins select System IO DigPort Data Select the Data Out field and enter the binary word To configure the pin function DIG PIN 1 7 FUNC DIO To configure pin polarity DIG PIN 1 7 POL pol To send data to the pins DIG OUTP DATA data The digital I O pin can be used to control both relay circuits as well as digital interface cir...

Page 106: ...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 micro...

Page 107: ...POL pol 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 input signal control the output state of all of the output channels in the mainframe The signal latency is 5 microseconds Pin 3 can be programmed for the following Inhibit modes which are stored in non volatil...

Page 108: ...dition occurs in a daisy chained system protection configuration two fault conditions must be removed 1 The initial protection fault or external Inhibit signal 2 The subsequent daisy chained fault signal which is sourced by the Inhibit signal NOTE 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 ...

Page 109: ...owever it is possible to configure a power system in which the combined ratings of the power modules exceed the power rating of the mainframe 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 combin...

Page 110: ...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 limi...

Page 111: ...y the power limits that are set send Front Panel SCPI Command Select Output Advanced Power The power allocation for all output channels is displayed in the dialog boxes POW LIM 1 4 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 NOTE When an output channel is set...

Page 112: ......

Page 113: ... 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 t...

Page 114: ...iority 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 inst...

Page 115: ...OTE If you have previously characterized the minimum turn on delays 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 To configure the output turn on delays 1 Enable the turn on synchronization function on the mainframe 2 Specify the out...

Page 116: ...hronized 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 In the front panel menu select Output Sequence Couple The Max delay offset for this frame field displays the delay offset of the slowest power module in the frame Enter the delay offset value of the slow...

Page 117: ...nframe select Output Sequence Couple In the Delay offset field enter the delay offset value of the slowest power module of all the mainframes in milliseconds then press Select The Max delay offset for this frame field displays the delay offset of the slowest power module in this frame To specify the common delay offset for each mainframe in seconds OUTP COUP DOFF 051 To return the delay offset of ...

Page 118: ...me 1 as the ON control 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 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...

Page 119: ...e Quadrant Operation 120 Keysight N678xA Multi Quadrant Operation 122 This appendix discusses the difference between constant voltage and constant current operating modes multiple output quadrant operation and other advanced source functions ...

Page 120: ...nges the output current remains 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 m...

Page 121: ...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 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 curre...

Page 122: ...ng 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 Key Sourcing power Sinking power Programmable V setting I limit I...

Page 123: ...d 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 ...

Page 124: ...ge 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 porti...

Page 125: ...turning current data 82 setting 47 63 current priority 123 current sinking 121 CV 13 D damage 25 data socket 58 DCL 58 Declaration of conformity 2 default gateway 55 digital I O configuring 105 connections 105 digital input configuring 106 connections 106 digitizer programming 79 dimensions 102 downprogramming 121 E environmental conditions 26 Err 12 49 external data logging 90 initiate 92 returni...

Page 126: ...measurement features 9 measurement trigger generate 85 initiate 84 source 83 measurements arrays 82 converter 83 Hanning window 81 Rectangular window 81 sample interval 80 simultaneous V and I 78 Menu 48 model differences 10 model numbers 24 multiple load connections 35 N N6781A auxiliary measurements 78 resistance programming 66 N678xA digitizing speed 80 wire length requirements 33 non volatile ...

Page 127: ...36 reset states 22 resistance 66 S safety 3 class 26 warning 26 sample interval 80 91 SCPI common commands 21 subsystem commands 16 screen saver 97 self test 94 sense leads open 37 sensitive loads 42 sockets 58 specifications characteristics 99 SRQ 58 step programming 68 storing states 94 subnet mask 54 55 support rails 28 switching transients 42 synchronizing measurements 83 system features 9 sys...

Page 128: ...ndix E Source Operating Modes 128 Keysight N6700 User s Guide This information is subject to change without notice Keysight Technologies 2006 2015 Edition 8 January 2015 5969 2937 5969 2937 www keysight com ...

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