Agilent Technologies N6700 User Manual

Agilent Technologies Low-Profile Modular Power System

Series N6700

User’s Guide

Legal Notices

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Manual Editions

Manual Part Number: 5969-2937 Fourth Edition, January, 2008 Printed in Malaysia.

Reprints of this manual containing minor corrections and updates may have the same printing date. Revised editions are identified by a new printing date.

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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.

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Certification

Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory. Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology, to the extent allowed by the Institute's calibration facility, and to the calibration facilities of other International Standards Organization members.

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Assistance

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Microsoft and Windows are U.S. registered trademarks of Microsoft Corporation.

2 Series N6700 User’s Guide

Safety Notices

The following general safety precautions must be observed during all phases of operation of this instrument. Failure to comply with these precautions or with specific warnings or instructions elsewhere in this manual violates safety standards of design, manufacture, and intended use of the instrument. Agilent Technologies assumes no liability for the customer's failure to comply with these requirements.

General

Do not use this product in any manner not specified by the manufacturer. The protective features of this product may be impaired if it is used in a manner not specified in the operation instructions.

Before Applying Power

Verify that all safety precautions are taken. Make all connections to the 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 fuse, which is not customer accessible.

Do Not Operate in an Explosive Atmosphere

Do not operate the instrument in the presence of flammable gases or fumes.

Do Not Remove the Instrument Cover

Only qualified, service-trained personnel who are aware of the hazards involved should remove instrument covers. Always disconnect the power cable and any external circuits before removing the instrument cover.

Do Not Modify the Instrument

Do not install substitute parts or perform any unauthorized modification to the product. Return the product to an Agilent Sales and Service Office for service and repair to ensure that safety features are maintained.

In Case of Damage

Instruments that 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.

WARNING

A WARNING notice denotes a hazard. It calls attention to an operating procedure, practice, or the like that, if not correctly performed or adhered to, could result in personal injury or death. Do not proceed beyond a WARNING notice until the indicated conditions are fully understood and met.

Safety Symbols

Direct current

Alternating current

Both direct and alternating current

Three phase alternating current

Earth (ground) terminal

Protective earth ground terminal.

Frame or chassis terminal

Terminal is at earth potential.

Neutral conductor on permanently installed equipment

Line conductor on permanently installed equipment.

On supply

Off supply

Standby supply. Unit is not completely disconnected from AC mains when switch is off

In position of a bi-stable push switch

Out position of a bi-stable push switch

Caution, risk of electric shock

Caution, hot surface

Caution, refer to accompanying description

Series N6700 User’s Guide 3

In this Book

Specific chapters in this manual contain the following information:

 Quick Reference – Chapter 1 is a quick reference section that

helps you quickly become familiar with your Agilent N6700 Modular Power System. It describes the differences between the various modules in the power system.

 Installation – Chapter 2 describes how to install your power

system. It describes how to connect various loads to the output. It discusses remote sensing as well as parallel and series operation.

 Getting Started – Chapter 3 describes how to set the voltage,

current, over-voltage protection, and turn on the output. It also describes how to configure the remote interface.

 Operating the Power System – Chapter 4 describes how to use

the advanced features of the power system using the front panel menus and the corresponding SCPI commands.

 Specifications – Appendix A describes specifications and

supplemental characteristics.

NOTE

 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.

For complete details on the SCPI (Standard Commands for Programmable Instruments) commands, refer to the Programmer’s Reference Help file included on the Agilent N6700 Product Reference CD. This CD-ROM is shipped along with your instrument.

You can contact Agilent 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 Agilent in your country or specific location: www.agilent.com/find/assist Or contact your Agilent Technologies Representative.

The web contains the most up to date version of the manual. Go to

http://www.agilent.com/find/N6700

to get the latest version of the manual.

4 Series N6700 User’s Guide

1 - Quick Reference...............................................................................................................................7

The Agilent N6700 Modular Power System – At a Glance..........................8

The Front Panel - At a Glance......................................................................... 10

The Rear Panel – At a Glance.........................................................................10

Front Panel Display – At a Glance ................................................................. 11

Front Panel Keys – At a Glance...................................................................... 12

Front Panel Menu Reference ..........................................................................13

SCPI Command Summary................................................................................ 15

2 - Installation......................................................................................................................................19

General Information.......................................................................................... 20

Inspecting the Unit ........................................................................................... 21

Installing the Unit..............................................................................................21

Connecting the Line Cord ................................................................................ 24

Connecting the Outputs................................................................................... 25

Remote Sense Connections............................................................................29

Parallel Connections.........................................................................................30

Series Connections........................................................................................... 32

3 - Getting Started...............................................................................................................................35

Turning the Unit On .......................................................................................... 36

Selecting an Output Channel.......................................................................... 36

Entering an Output Voltage Setting............................................................... 36

Entering a Current Limit Setting..................................................................... 37

Enabling the Output.......................................................................................... 37

Using the Front Panel Menu........................................................................... 38

Connecting to the Interfaces ..........................................................................40

4 - Operating the Power System .......................................................................................................51

Programming the Output .................................................................................52

Synchronizing Output Steps............................................................................ 55

Making Measurements.................................................................................... 58

Using the Protection Functions...................................................................... 59

System-Related Operations............................................................................. 61

Programming High-Speed Test Extensions.................................................. 65

Series N6700 User’s Guide 5

Appendix A - Specifications ..............................................................................................................75

Agilent Models N6751A/N6752A, N6753A/N6754A, N6761A/N6762A76

Agilent Models N6731B - N6736B and N6741B - N6746B........................82

Agilent Models N6773A - N6776A................................................................. 84

Agilent N6700B, N6701A, N6702A MPS Mainframes................................ 86

Appendix B - Using the Digital Port..................................................................................................89

Digital Control Port ........................................................................................... 90

Configuring the Digital Control Port...............................................................91

Appendix C - Power Allocation .........................................................................................................95

Power Limit Operation ..................................................................................... 96

Module Power Allocation................................................................................ 97

Apendix D - Output On/Off Synchronization ...................................................................................99

Synchronizing Output Turn-on Delays.........................................................100

Synchronizing Multiple Mainframes............................................................ 103

Operation.......................................................................................................... 104

Index................................................................................................................................................... 105

6 Series N6700 User’s Guide

1 Quick Reference

The Agilent N6700 Modular Power System – At a Glance.......................... 8

The Front Panel - At a Glance......................................................................... 10

The Rear Panel – At a Glance......................................................................... 10

Front Panel Display – At a Glance .................................................................11

Front Panel Keys – At a Glance...................................................................... 12

Front Panel Menu Reference.......................................................................... 13

SCPI Command Summary................................................................................ 15

NOTE

This chapter concisely describes the operation of the Agilent N6700 Modular Power System (MPS).

This chapter does not describe every operating feature in detail. It is simply a quick reference guide to quickly become familiar with the essential operating features of the power system.

Unless otherwise noted, the Agilent N6700 Modular Power System will also be referred to as “MPS” and “power system” throughout this manual.

Series N6700 User’s Guide 7

1 Quick Reference

The Agilent N6700 Modular Power System – At a Glance

The Agilent N6700 Modular Power System is a configurable, one rackunit (1U) platform that lets you mix and match power modules to create a power system optimized for your test system requirements.

Agilent 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 50 W, 100 W, and 300 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 modules 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 output and system features are described in the following sections. Not all output features are available on every power module. The “Model Differences” section describes the features that apply only to specific power modules.

Output Features

Programmable voltage and current

Fast command processing Command processing time of less than 1 millisecond per command.

Fast up/down programming

Fast transient response Transient response is less than 100 microseconds for autoranging and

Low output noise Output noise is 4.5 mV peak-to-peak for autoranging and precision power

Full programming capability is provided for the entire range of output voltage and current. Outputs can operate as either constant voltage (CV) or constant current (CC) sources.

1.5 millisecond response time from 10% to 90% of the output rating for autoranging and precision power modules. Refer to Appendix A for details.

precision power modules. Refer to Appendix A for details.

modules, which is comparable to linear supplies. Refer to Appendix A for details.

Autoranging capability Autoranging produces the maximum rated power over a wide and

continuous range of voltage and current settings for autoranging and precision power modules. Refer to Appendix A for details.

8 Series N6700 User’s Guide

Quick Reference 1

Output On/Off sequencing A turn-on/turn-off delay capability for each output allows output on/off

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.

Voltage and current

All power modules can measure their own output voltage and current.

measurements

Voltage, current, and temperature protection

Each output has over-voltage, over-current, and over-temperature protection. Over-voltage and over-current protection are programmable. When activated, the protection circuits cause the voltage to go to zero, the output to be disabled, and the protection status to be reported.

System Features

SCPI language The instrument is compatible with the Standard Commands for

Programmable Instruments (SCPI).

Choice of three interfaces GPIB (IEEE-488), LAN, and USB remote programming interfaces are built in.

Front panel I/O setup Menus let you set up GPIB and LAN parameters from the front panel. Refer

to Chapter 3 for details.

Built-in Web server A built-in Web server lets you control the instrument directly from an

internet browser on your computer. Refer to Chapter 3 for details.

Real-time status information

Module identification Each module has identifying data stored in non-volatile memory.

The front panel indicates the status of each output. It also indicates when a protection shut-down has occurred.

Information includes model number, serial number, and options. This information can be displayed on the front panel.

Model Differences

Feature DC Power Modules Autoranging Modules Precision Modules

N6731B -

N6736B

Output power rating 50 W 100 W 300 W 50 W 100 W 300 W 50 W 100 W

Autoranging output capability NO NO NO YES YES YES YES YES

Precision output and measurement capability NO NO NO NO NO NO YES YES

Low voltage output and measurement range NO NO NO NO NO NO YES YES

Low current output and measurement range NO NO NO NO NO NO YES YES

Simultaneous voltage and current measurement NO NO NO NO NO NO YES YES

100 microampere measurement range NO NO NO NO NO NO Option Option

Output list capability (Test Extensions) NO NO NO Option Option Option YES YES

Array readback capability (Test Extensions) NO NO NO Option Option Option YES YES

Programmable sample rate (Test Extensions) NO NO NO Option Option Option YES YES

Double-wide NO NO NO NO NO YES NO NO

Series N6700 User’s Guide 9

N6741B N6746B

N6773A N6776A

N6751A N6752A N6753A

N6754A

N6761A N6762A

1 Quick Reference

The Front Panel - At a Glance

Display

Turns off after 1 hour of inactivity. Press any key to restore the display.

N6700A Modular Power System

20.007V 4.004A

CV Set: 20.000V 5.500A

o -

On/Off switch and LED

LED indicates power is on. Green = normal operation. Amber = display is screen saver mode.

The Rear Panel – At a Glance

Navigation keys

Move the cursor to a menu item. Select the highlighted menu item.

Meter

Channel

Help

Back

Error

On/Off

Voltage

Sel

Current

System keys

Toggle between single-channel and multiple-channel view. Access front panel command menu. Select an output channel to control.

Output keys

Turn the outputs on or off. Enter voltage or current.

987

456

Enter

+/-

Numeric entry keys

Enter values. Increment or decrement values.

+s + -s

4-pin output connector.

Includes +/−output and +/− sense terminals.

WARNING

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.

GPIB connector

+s + -s +s + -s

8-pin digital control connector

Connector function is user-configurable.

Chassis ground binding post

1 2 3 4 5 6 7

3-pin IEC 320 AC input connector

Power cord requires ground conductor.

USB connector LAN connector

10/100 Base-T Left LED indicates activity. Right LED indicates link integrity.

10 Series N6700 User’s Guide

Front Panel Display – At a Glance

Quick Reference 1

Single-channel view Voltage

measurement

Press the Meter key to toggle between views

Multiple-channel view Voltage and Current measurements

Press the Meter key to toggle between views

The highlighted channel is the active channel

Grouped-channel view Channels 2 through 4 are connected in parallel and have been

Refer to Chapter 4, under “System-Related Operations” for more information

Operating status (CV = constant voltage)

configured or grouped to act as a single, higher-power channel

Bar indicates output polarity is reversed

Voltage and current settings

Current measurement

Interface status (IO

= activity on interface)

Double-wide view Channel 2 is a double-wide power module that occupies two channel

Interface status indicators

Series N6700 User’s Guide 11

Grouped channels are addressed using the channel number of the lowest channel in the group

locations in the mainframe

All = the On/Off key is active on all channels Err = an error has occurred (press Error key to display error message) Lan = the LAN is connected and has been configured IO = there is

activity on one of the remote interfaces

1 Quick Reference

Operating status indicators

OFF = the output is off CV = the output is in constant voltage mode CC = the output is in constant current mode OV = the output is disabled by the over-voltage protection OC = the output is disabled by the over-current protection PF = the output is disabled by a power-fail condition CP+ = the output is limited (or disabled) by the positive power limit* OT = the over-temperature protection has tripped CP– = the output is limited by the negative power limit* 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 * see Appendix C

Front Panel Keys – At a Glance

System keys

Meter returns the display to metering mode.

Sel

Menu accesses the command menu. Channel selects or highlights a channel to control.

Back

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.

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.

Meter

Channel

Help Error

Navigation keys

Output keys

On/Off

Voltage

Current

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

The 0 through 9 keys enter numbers from 0 to 9. The (.) key enters a 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 © ª arrow keys increment or decrement the value in certain

987

fields. 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.

12 Series N6700 User’s Guide

Front Panel Menu Reference

Quick Reference 1

NOTE

Menu commands that are grayed-out are either not available for the power module, or are password protected. Refer to the Service Guide for information about front panel menu commands prior to firmware revision B.00.00.

Menu Command Control Description

Output Voltage Programs voltage setting and range.

Current Programs current setting and range.

Delay Programs Turn-on /Turn off delay.

Slew Programs voltage slew rate.

Power Programs the power allocation function.

Pol Lets you reverse the polarity of the output and sense terminals.

Couple Couples output channels for output on/off synchronization.

Measure Range Selects voltage and current measurement range.

Sweep Specifies measurement points, time interval, and trigger offset.

Window Selects measurement window: Rectangular, Hanning.

Control Lets you abort a measurement in progress.

Transient Mode 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.

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.

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-on state: *RST, RCL0.

System IO 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.

Series N6700 User’s Guide 13

1 Quick Reference

Menu Command Control Description

System IO 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 Pin1 Function

Polarity

Pin2 Function

Polarity

Pin3 Function

Polarity

Pin4 Function

Polarity

Pin5 Function

Polarity

Pin6 Function

Polarity

Pin7 Function

Polarity

Data Sends/reads data from the digital I/O 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 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.

Cal Function Vprog High Enters measured data for the High calibration point.

Vmeas Enters measured data.

CMRR Calibrates common mode rejection ratio.

Iprog High Enters measured data for the High calibration point.

Imeas 100mA Enters measured data for the 100 mA range point.

Dprog Calibrates the downprogrammer.

Ipeak Calibrates I peak.

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.

Specifies the pin function: DigIn, DigIO, TrigIn, TrigOut, FaultOut. Specifies the pin polarity: Positive, Negative

Specifies the pin function: DigIn, DigIO, TrigIn, TrigOut. Specifies the pin polarity: Positive, Negative

Specifies the pin function: DigIn, DigIO, TrigIn, TrigOut, InhibitIn. Specifies the pin polarity: Positive, Negative

Specifies the pin function: DigIn, DigIO, TrigIn, TrigOut, OnC, OffC. Specifies the pin polarity: Positive, Negative

Low Enters measured data for the Low calibration point.

100uA Enters measured data for the 100 µA range point.

14 Series N6700 User’s Guide

SCPI Command Summary

Subsystem Commands

Quick Reference 1

NOTE

Some [optional] commands have been included for clarity. All settings commands have a corresponding query. Not all commands apply to all models.

SCPI Command Description

ABORt :ACQuire (@chanlist) Resets the measurement trigger system to the Idle state :TRANsient (@chanlist) Resets the transient trigger system to the Idle state

CALibrate :CURRent [:LEVel] <NRf>, (@channel) Calibrates the output current programming :MEASure <NRf>, (@channel) Calibrates the current measurement :PEAK (@channel) Calibrates the peak current limit (Agilent N6751A/52A/61A/62A) :DATA <NRf> Enters the calibration value :DATE <SPD>, (@channel) Sets the calibration date :DPRog (@channel) Calibrates the current downprogrammer :LEVel P1 | P2 | P3 Advances to the next calibration step :PASSword <NRf> Sets the numeric calibration password :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 (N6751A/52A/61A/62A) :MEASure <NRf>, (@channel) Calibrates the voltage measurement

DISPlay[:WINDow]:VIEW METER1 | METER4 Selects 1-channel or 4-channel meter view

FETCh [:SCALar] :CURRent [:DC]? (@chanlist) Returns the average output current :VOLTage [:DC]? (@chanlist) Returns the average output voltage :ARRay (Array commands only on Agilent N6761A/62A and Option 054) :CURRent [:DC]? (@chanlist) Returns the instantaneous output current :VOLTage [:DC]? (@chanlist) Returns the instantaneous output voltage

INITiate [:IMMediate] (Acquire command only on Agilent N6761A/62A and Option 054) :ACQuire (@chanlist) Enables the measurement system to receive triggers :TRANsient (@chanlist) Enables the output transient system to receive triggers :CONTinuous :TRANsient <Bool>, (@chanlist) Enables/disables continuous transient triggers

MEASure [:SCALar] :CURRent [:DC]? (@chanlist) Takes a measurement; returns the average output current :VOLTage [:DC]? (@chanlist) Takes a measurement; returns the average output voltage :ARRay (Array commands only on Agilent N6761A/62A and Option 054) :CURRent [:DC]? (@chanlist) Takes a measurement; returns the instantaneous output current :VOLTage [:DC]? (@chanlist) Takes a measurement; returns the instantaneous output voltage

Series N6700 User’s Guide 15

1 Quick Reference

SCPI Command Description

OUTPut [:STATe] <Bool> [,NORelay], (@chanlist) Enables/disables the specified output channel(s) :COUPle[:STATe] <Bool> Enables/disables channel coupling for output synchronization :CHANNel [<NR1> {,<NR1>}] Selects which channels are coupled :DOFFset <NRf> Specifies a maximum delay offset to synchronize output changes :MAX:DOFFset? Returns the maximum delay offset required for a mainframe :DELay :FALL <NRf+>, (@chanlist) Sets the output turn-off sequence delay :RISE <NRf+>, (@chanlist) Sets the output turn-on sequence delay :PMODe VOLTage | CURRent, (@chanlist) Sets the mode for turn on/off transitions (Agilent N6761A/62A) :INHibit:MODE LATChing | LIVE | OFF Sets the remote inhibit input :PON:STATe RST | RCL0 Programs the power-on state :PROTection :CLEar (@chanlist) Resets latched protection :COUPle <Bool> Enables/disables channel coupling for protection faults :DELay <NRf+>, (@chanlist) Sets over-current protection programming delay :RELay:POLarity NORMal | REVerse, (@chanlist) Sets the output relay polarity (Option 760)

SENSe :CURRent [:DC]:RANGe [:UPPer] <NRf+>, (@chanlist) Selects the current measurement range (Agilent N6761A/62A) CCOMpensate <Bool>, (@chanlist) Enables/disables the capacitive current compensation :FUNCtion “VOLTage” | ”CURRent”, (@chanlist) Selects the measurement function :SWEep (Sweep commands only on Agilent N6761A/62A and Option 054) :OFFSet:POINts <NRf+>, (@chanlist) Defines the trigger offset in the measurement sweep :POINts <NRf+>, (@chanlist) Defines the number of data points in the measurement :TINTerval <NRf+>, (@chanlist) Sets the measurement sample interval :VOLTage[:DC]:RANGe [:UPPer] <NRf+>, (@chanlist) Selects the voltage measurement range (Agilent N6761A/62A) :WINDow[:TYPE] HANNing | RECTangular, (@chanlist) Selects the measurement window (N6761A/62A and Option 054)

[SOURce:] CURRent [:LEVel] [:IMMediate][:AMPLitude] <NRf+>, (@chanlist) Sets the output current :TRIGgered [:AMPLitude] <NRf+>, (@chanlist) Sets the triggered output current :MODE FIXed | STEP | LIST, (@chanlist) Sets the current trigger mode :PROTection :DELay[:TIME] <NRf+>, (@chanlist) Sets the over-current protection programming delay :STARt SCHange | CCTRans, (@chanlist) Sets the over-current protection programming mode :STATe <Bool>, (@chanlist) Enables/disables over-current protection on the selected output :RANGe <NRf+>, (@chanlist) Sets the output current range (Agilent N6761A/62A) DIGital :INPut:DATA? Reads the state of the digital port pins :OUTPut:DATA <NRf> Sets the digital port :PIN<1-7> :FUNCtion :POLarity POSitive | NEGative Sets the selected pin’s polarity LIST (List commands only on Agilent N6761A/62A and Option 054) :COUNt <NRf+> | INFinity, (@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

16 Series N6700 User’s Guide

Quick Reference 1

SCPI Command Description

[SOURce:]LIST (continued) :STEP ONCE | AUTO, (@chanlist) Specifies how the list responds to triggers :TERMinate:LAST <Bool>, (@chanlist) Sets the list termination mode :TOUTput :BOSTep[:DATA] <Bool> {,<Bool>}, (@chanlist) Generate triggers at the Beginning Of Step :POINts? (@chanlist) Returns the number of beginning of step list points :EOSTep[:DATA] <Bool> {,<Bool>}, (@chanlist) Generate triggers at the End Of Step :POINts? (@chanlist) Returns the number of end of step list points :VOLTage[:LEVel] <NRf> {,<NRf>}, (@chanlist) Sets the voltage list :POINts? (@chanlist) Returns the number of voltage level points POWer:LIMit <NRf+>, (@chanlist) Sets the power limit on output channels STEP:TOUTput <Bool>, (@chanlist) Generate a trigger output on the voltage or current step transient VOLTage [:LEVel] [:IMMediate][:AMPLitude] <NRf+>, (@chanlist) Sets the output voltage :TRIGgered [:AMPLitude] <NRf+>, (@chanlist) Sets the triggered output voltage :MODE FIXed | STEP | LIST, (@chanlist) Sets the voltage trigger mode :PROTection[:LEVel] <NRf+>, (@chanlist) Sets the over-voltage protection level :RANGe <NRf+>, (@chanlist) Sets the output voltage range (Agilent N6761A/62A) :SLEW[:IMMediate] <NRf+> | INFinity, (@chanlist) Sets the output voltage slew rate

STATus :OPERation [:EVENt]? (@chanlist) Returns the value of the operation event register :CONDition? (@chanlist) Returns the value of the operation condition register :ENABle <NRf>, (@chanlist) Enables specific bits in the Event register :NTRansition <NRf>, (@chanlist) Sets the Negative transition filter :PTRansition <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 :PTRansition <NRf>, (@chanlist) 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 selected 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 :CATalog? Returns the groups that have been defined :DEFine (@chanlist) Group multiple channels together to create a single output :DELete <channel> 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

Series N6700 User’s Guide 17

1 Quick Reference

SCPI Command Description

TRIGger :ACQuire (Acquire commands only on Agilent N6761A/62A and Option 054) [:IMMediate] (@chanlist) Triggers the measurement immediately :SOURce BUS | PIN<n> | TRAN<n>, (@chanlist) Sets the measurement trigger source :TRANsient [:IMMediate] (@chanlist) Triggers the output immediately :SOURce BUS | PIN<n> | TRAN<n>, (@chanlist) Sets the output trigger source

Common Commands

Command Description Command Description

*CLS Clear status *RST Reset

*ESE <NRf> Standard event status enable *SAV <NRf> Saves an instrument state

*ESR? Return event status register *SRE <NRf> Set service request enable register

*IDN? Return instrument identification *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 <NRf> Recalls a saved instrument state *WAI Pauses additional command processing

*RDT? Return output channel descriptions until all device commands are done

*RST Settings

These settings are set by the *RST (Reset) command

CAL:STAT OFF OUTP:PMOD VOLT

[SOUR:]CURR 0.08 or MIN OUTP:PROT:COUP OFF

[SOUR:]CURR:MODE FIX OUTP:PROT:DEL 0.02

[SOUR:]CURR:PROT:STAT OFF OUTP:REL:POL NORM

[SOUR:]CURR:RANG MAX [SOUR:]POW:LIM MAX

[SOUR:]CURR:TRIG MIN SENS:CURR:RANG MAX

[SOUR:]DIG:OUTP:DATA 0 SENS:FUNC “VOLT”

DISP:VIEW METER1 SENS:SWE:POIN 1024

INIT:CONT:TRAN OFF SENS:SWE:OFFS:POIN 0

[SOUR:]LIST:COUN 1 SENS:SWE:TINT 20.48E−6

[SOUR:]LIST:CURR MIN SENS:VOLT:RANG MAX

[SOUR:]LIST:DWEL 0.001 SENS:WIND RECT

[SOUR:]LIST:STEP AUTO [SOUR:]STEP:TOUT FALSE

[SOUR:]LIST:TERM:LAST OFF TRIG:ACQ:SOUR BUS

[SOUR:]LIST:TOUT:BOST OFF TRIG:TRAN:SOUR BUS

[SOUR:]LIST:TOUT:EOST OFF [SOUR:]VOLT MIN

[SOUR:]LIST:VOLT MIN [SOUR:]VOLT:MODE FIX

OUTP OFF [SOUR:]VOLT:PROT MAX

OUTP:DEL:FALL 0 [SOUR:]VOLT:RANG MAX

OUTP:DEL:RISE 0 [SOUR:]VOLT:SLEW 9.9E+37

[SOUR:]VOLT:TRIG MIN

18 Series N6700 User’s Guide

2 Installation

General Information.......................................................................................... 20

Inspecting the Unit ...........................................................................................21

Installing the Unit..............................................................................................21

Connecting the Line Cord ................................................................................24

Connecting the Outputs................................................................................... 25

Remote Sense Connections............................................................................ 29

Parallel Connections.........................................................................................30

Series Connections........................................................................................... 32

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 Agilent Sales and Support Office.

Series N6700 User’s Guide 19

2 Installation

General Information

Models

Agilent Model Description

N6700B / N6701A / N6702A 400 W / 600 W / 1200W MPS Mainframe - without DC Power Modules N6751A / N6752A 50 W / 100 W High-Performance Autoranging DC Power Module N6753A / N6754A 300 W 20V / 60V High-Performance Autoranging DC Power Module N6761A / N6762A 50 W / 100 W Precision DC Power Module N6731B / N6741B 50 W / 100 W 5 V DC Power Module N6732B / N6742B 50 W / 100 W 8 V 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 50 W / 100 W / 300 W 100 V DC Power Module

Items Supplied

Item Description Part Number

Power Cord A power cord suitable for your location. Shipped w/mainframe. Call Agilent Sales & Support Office Ferrite Core Installs on power cord to reduce common mode currents. Agilent 9170-2131 Digital Connector One 8-pin connector for connecting signal lines to the digital

port. Shipped with mainframe. Product Reference CD-ROM Includes drivers and documentation. Automation-Ready CD-ROM Contains Agilent IO Libraries Suite. Shipped with mainframe. Agilent E2094N 12 A Output Connector One 12A, 4-pin connector plug for connecting power and sense

leads. Used in all except N6731B, N6741B, N6754A, N6773A.

20 A Output Connector One 20A, 4-pin connector plug for connecting power and sense

leads. Only used in N6731B, N6741B, N6754A, N6773A. 50 A Output Connector One 50A, 2-pin connector plug for connecting power leads.

Only used in N6753A.

Small Sense Jumpers Two small jumpers for local sensing at the output connector.

Used in all except N6731B, N6741B, N6754A, N6773A. Large Sense Jumpers Two large jumpers for local sensing at the output connector.

Only used in N6731B, N6741B, N6754A, N6773A. Sense Connector A 4-pin connector for connecting sense leads. Wires (p/n

5185-8847) are used for local sensing. Only used in N6753A.

Module Cal. Certificate A certificate of calibration referenced to the serial number. N/A

Shipped with mainframe. Agilent 5969-2914

Agilent 1253-6408 Phoenix Contact MC 1,5/8-ST-3,5

Agilent 1253-5826 Phoenix Contact MSTB 2,5/4-STF

Agilent 1253-6211 Phoenix Contact PC 4/4-ST-7,62

Agilent 1253-7187 Molex 39422-0002

Agilent 8120-8821 Phoenix Contact EPB 2-5(1733169)

Agilent 0360-2935 Phoenix Contact 3118151

Agilent 1253-5830 Phoenix Contact MC 1,5/4-ST-3,5

Options

Option Description

0L1 Manual Set. Contains User’s Guide and Service Guide. Also available as part number 5969-2939. 054 High-speed Test Extensions. Includes digitized output measurements and output list capability.

Available for Agilent Models N675xA. Included with Agilent Models N676xA.

760 Output disconnect/polarity reversal. Disconnects the + and – output and sense terminals. Switches

the + and – output and sense polarities. Not available on Models N6741B, N675xA, or N676xA. 761 Output disconnect. Disconnects + and – output and sense terminals. Available for all Agilent Models. 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. 2UA

20 Series N6700 User’s Guide

200 μA measurement range with output disconnect relays. Only available on Agilent Models N676xA.

Inspecting the Unit

Installing the Unit

Safety Considerations

Installation 2

When you receive your power system, inspect it for any obvious damage that may have occurred during shipment. If there is damage, notify the shipping carrier and nearest Agilent Sales and Support Office immediately. Refer to www.agilent.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.

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 procedures are located at appropriate places throughout this Guide.

Environment

WARNING

Do not operate the instrument in the presence of flammable gasses or fumes

The environmental conditions of the instrument are documented in Appendix A. Basically, the instrument should only be operated indoors in a controlled environment.

The dimensions of your instrument as well as an outline diagram are given in Appendix A. A fan cools the power system by drawing air through the sides and exhausting it out the 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.

Rack Installation

CAUTION

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.

Agilent 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.

Series N6700 User’s Guide 21

2 Installation

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.

Step 2. 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.

22 Series N6700 User’s Guide

Bench Installation

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.

Channel Number

The channel number of a power module is determined by the location of that module in the mainframe. When viewed from the rear, the module next to the GPIB connector is always output channel one. Numbering continues sequentially to the left, from one to four.

If there are less than four modules, channel numbering corresponds to the actual number of installed power modules. Unused channel slots must contain filler modules to ensure proper airflow for cooling.

Double-wide power modules are assigned the channel number of the lowest numbered slot in which is installed. For example, if a doublewide module is installed in slots 3 and 4, it is assigned channel number 3.

Installation 2

NOTE

Power modules that are connected in parallel and have been configured or grouped to act as a single, higher-power channel are addressed using the channel number of the lowest channel in the group.

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 always be connected and that any leakage current will be diverted to ground. Refer to the Service Guide for installation instructions.

Power Factor

At 400 Hz AC input operation, the unit’s power factor is affected as follows:

 Under full load at 400 Hz, power factor drops from 0.99 (@120

 Power factor degrades further under no load conditions.

VAC) to as low as 0.76 (@ 265 VAC).

Cleaning

WARNING

Series N6700 User’s Guide 23

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 attempt to clean internally.

2 Installation

Connecting the Line Cord

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 Agilent 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.

Agilent 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 drawn from the AC mains will be < 15 A, so that standard 100-120 VAC AC mains circuits will not be overloaded.

NOTE

The detachable power cord may be used as an emergency disconnecting device. Removing the power cord will disconnect AC input power to the unit.

Snap-On Ferrite Core

Installing the ferrite core is only necessary if you are connecting highly sensitive loads to the output of the modular power system. The purpose of the ferrite core is to reduce the possibility of common mode current spikes appearing at the output of the modular power system when AC power is switched on or off.

Additional measures to protect sensitive loads from common mode currents are discussed under “Protecting Sensitive Loads from AC Power Switching Transients” later in this chapter.

Installation

 Locate the core anywhere along the length of the cord.

 Pass the power cord through the core twice.

 Close the core.

24 Series N6700 User’s Guide

Connecting the Outputs

Installation 2

LOCKING

SCREW

WARNING

CAUTION

12 A

CONNECTOR

+S + -S

SHOCK HAZARD Turn off AC power before making rear panel connections. All wires and straps must be properly connected with the terminal block screws securely tightened.

Disconnect the connector plug to make your wire connections. The 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 A connector by tightening the locking screws. A chassis ground binding post is located next to the AC input connector for ground connections.

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.

TIGHTEN SCREWS

20 A CONNECTOR

50 A

CONNECTOR

+S + -S

LOCKING

SCREW

50A

SENSE

+S +LS -LS -S

INSERT WIRES

TWIST LEADS

LOAD

SENSE JUMPERS

INSTALLED FOR LOCAL SENSING

LOAD

INSERT WIRES

TWIST LEADS

SENSE JUMPERS

INSTALLED FOR

LOCAL SENSING

LOAD

Series N6700 User’s Guide 25

2 Installation

Wire Size

WARNING

FIRE HAZARD Select a wire size large enough to carry short-circuit current without overheating. To satisfy safety requirements, load wires must be heavy enough not to overheat while carrying the short-circuit output current of the unit (refer to the following table).

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.

Note 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

for stranded copper wire

AWG 2 wires bundled 4 wires bundled ΩΩΩΩ/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 mm2 2 wires bundled 4 wires bundled ΩΩΩΩ/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 12.7 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 26.6 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.

Resistance Max. Length to Limit Voltage to 1 V/Lead

for 5 A for 10 A for 20A for 50 A

26 Series N6700 User’s Guide

Multiple Loads

Installation 2

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 & 20 A

CONNECTOR

+S + -S

TWIST LEADS

+ +

LOAD

50 A CONNECTOR

50A SENSE

+S +LS -LS -S

SENSE JUMPERS

INSTALLED FOR

LOCAL SENSING

LOAD

SENSE JUMPERS

INSTALLED FOR

LOCAL SENSING

TWIST LEADS

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.

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.

Response Time with an External Capacitor

When programming with an external capacitor, voltage response time may be longer than that specified in Appendix A. Use the following formula to estimate the additional response time for up programming:

Response Time = (Added Output Capacitor)X(Change in Vout) Current Limit Setting

Note that programming into an external output capacitor may cause the power system to briefly enter constant current or constant power operating mode, which adds additional time to the estimation.

Positive and Negative Voltages

Either positive or negative voltages can be obtained from the output by grounding (or "commoning") one of the output terminals. Always use two wires to connect the load to the output regardless of where or how the system is grounded. The instrument can be operated with any output terminal ± 240 VDC including output voltage from ground.

Series N6700 User’s Guide 27

2 Installation

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 modular 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 modular power system.

Operating the AC line switch can inject common mode current spikes into the DC output leads, resulting in voltage spikes, which may damage sensitive loads. 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 the DC output of the modular power system. These filters typically include common mode capacitors connected to the power system chassis. 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 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 modular power system is turned on or off by the AC line switch:

1 Install the ferrite core on the power cord as described under

"Snap-On Core". This inserts impedance in the current path.

2 Install a separate “bonding” wire from the load’s common point,

to the ground terminal of the modular 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 input or you can connect an isolated measuring instrument to the load.

Scope

probe

NOTE

N6700 Modular

Power System

-S

Disconnecting the load from the output before switching the modular power system on or off will always protect the load from common mode currents.

28 Series N6700 User’s Guide

Remote Sense Connections

Installation 2

WARNING

12A & 20 A

CONNECTOR

TWIST

PAIR

SHOCK HAZARD Turn off AC power before making or changing rear 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 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.

50 A

+S + -S

TWIST LEADS

CONNECTOR

50A SENSE

+S +LS -LS -S

TWIST

PAIR

LOAD

CAUTION

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 sense leads as close to the load as possible. Refer to the “Wire Size” section for information about selecting the proper wire size. Best results are obtained by using the shortest load leads practical. It is recommended to keep load leads under 14.7 meters (50 feet) per lead because of inductance effects.

The sense leads carry only a few milliamperes of current and 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

0.5Ω per lead (this requires 20 AWG or heavier for a 50 foot length).

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.

Series N6700 User’s Guide 29

2 Installation

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

The OVP circuit senses at the main output terminals and not through the sense terminals. Due to the voltage drop in the load leads, the voltage sensed by the OVP circuit could be higher than the voltage being regulated at the load. Therefore, you must take into account the additional voltage drop in the load leads when setting the overvoltage trip point.

Output Noise Considerations

Parallel Connections

CAUTION

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 in Appendix A apply at the output terminals when using local sensing. However, voltage transients may be produced at the load by noise induced in the leads or by load current transients acting on the inductance and resistance of the load lead. If it is desirable to keep voltage transient levels to a minimum, place an aluminum or tantalum capacitor, with an approximate value of 10 µF per foot (30.5 cm) of load lead, right across the load.

Only connect outputs that have identical voltage and current ratings in parallel.

Connecting outputs in parallel provides a greater current capability than can be obtained from a single output.

The following 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 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 together.

30 Series N6700 User’s Guide

Installation 2

OUTPUT 2 OUTPUT 1

+S + -S

SENSE

JUMPERS

INSTALLED

TWIST LEADS

LOAD

WITH LOCAL SENSING

OUTPUT 1OUTPUT 3

OUTPUT 1

+S + -S

SENSE

JUMPERS

INSTALLED

OUTPUT 2

+S + -S

TWIST LEADS

LOAD

WITH REMOTE SENSING

The following figure shows the connections for 50A power modules.

OUTPUT 1OUTPUT 3

+S +LS -LS -S +S +LS -LS -S +S +LS -LS -S

LOAD

WITH LOCAL SENSING WITH REMOTE SENSING

+S +LS -LS -S

SENSE

JUMPERS

INSTALLED

TWIST LEADS

LOAD

TWIST LEADS

Grouping the Outputs

NOTE

The ability to group outputs is only available on power system mainframes with firmware revision B.00.00 and up.

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”.

Series N6700 User’s Guide 31

2 Installation

On mainframes with earlier version firmware, first program both outputs to the desired output voltage. Then program the current limit point of each output. The current limit of the paralleled outputs will be the sum of both individual current limit points.

Effect on 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 coefficient of current readback, use the minus current specifications:

Current 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.

Voltage All parallel specifications referring to voltage are the same as for a single

output except for CV load effect, CV load cross regulation, CV source effect, and CV short term drift. These are all twice the voltage programming accuracy (including the percentage portion) at all operating points.

Load Transient

Recovery Time

Series Connections

WARNING

CAUTION

Load transient specifications are typically twice the single output.

SHOCK HAZARD Floating voltages must not exceed 240 VDC. No output terminal may be more than 240 VDC from chassis ground.

Only connect outputs that have identical voltage and current ratings 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 2 must remain connected to the -sense terminal of output 1.

32 Series N6700 User’s Guide

Installation 2

OUTPUT 2

+S + -S

SENSE

JUMPERS

INSTALLED

TWIST LEADS

+S + -S

LOAD

WITH LOCAL SENSING

OUTPUT 1OUTPUT 3

OUTPUT 1

SENSE

JUMPERS

INSTALLED

OUTPUT 2

+S + -S

SENSE

JUMPER

INSTALLED

TWIST LEADS

OUTPUT 1

+S + -S

LOAD

WITH REMOTE SENSING

The following figure shows the connections for 50A power modules.

OUTPUT 1OUTPUT 3

+S +LS -LS -S

SENSE

JUMPERS

INSTALLED

TWIST LEADS

LOAD

WITH LOCAL SENSING WITH REMOTE SENSING

+S +LS -LS -S

SENSE

JUMPER

INSTALLE D

+S +LS -LS -S

LOAD

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.

+S +LS -LS -S

TWIST LEADS

NOTE

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.

Series N6700 User’s Guide 33

2 Installation

Effect on Specifications

Specifications for outputs operating in series can be obtained from the specifications for single outputs. Most specifications are expressed as a constant or a percentage (or ppm) plus a constant. For series operation, the percentage portion remains unchanged while constant portions or any constants are changed as indicated.

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 Recovery Time

Load transient specifications are typically twice the single output.

34 Series N6700 User’s Guide

3 Getting Started

Turning the Unit On.......................................................................................... 36

Selecting an Output Channel ..........................................................................36

Entering an Output Voltage Setting ............................................................... 36

Entering a Current Limit Setting..................................................................... 37

Enabling the Output.......................................................................................... 37

Using the Front Panel Menu ........................................................................... 38

Connecting to the Interfaces ..........................................................................40

NOTE

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 Agilent Technologies USB/LAN/GPIB Interfaces Connectivity Guide, which is available on the Automation-Ready CD included with this product

Series N6700 User’s Guide 35

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 selftest 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.

When the front panel display appears, you can use the front panel controls to enter voltage and current values.

Selecting an Output Channel

Channel

Press the Channel key to select the output channel that you wish to program.

Entering an Output Voltage Setting

Method 1 – Use the Navigation and Arrow Keys

Navigation Keys

Sel

Arrow Keys

Method 2 - Use the Voltage key to enter a value

Voltage

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.

You can also use the arrow keys to adjust the value up or down. 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.

Use the Voltage key to select the voltage entry field. In the display below, channel 1’s voltage setting is selected. Enter the desired setting using the numeric keypad. Then press Enter.

NOTE

36 Series N6700 User’s Guide

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.

Entering a Current Limit Setting

Method 1 – Use the Navigation and Arrow Keys

Getting Started 3

Navigation Keys

Sel

Arrow Keys

©©©© ªªªª

Use the left and right navigation keys to navigate to the setting that 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.

You can also use the arrow keys to adjust the value up or down. 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

Use the Current key to select the current entry field. In the display below, channel 1’s voltage setting is selected. Enter the desired setting using the numeric keypad. Then press Enter.

NOTE

Enabling the Output

Use the On/Off key to enable the output

On/Off

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.

If a load is connected to the output, the front panel display will indicate that it is drawing current. Otherwise, the current reading will be zero. The status indicator next to the channel number indicates the output’s status. In this case, the output channel is in constant voltage mode.

For a description of the status indicators, refer to Chapter 1, under “Front Panel Display – At a Glance”.

Series N6700 User’s Guide 37

3 Getting Started

Using the Front Panel Menu

The front panel command menu lets you access most of the power system’s functions. The actual function controls are located at the lowest menu level. Briefly:

 Press the Menu key to access the command menu.

 Press the navigation keys to move across the menu commands.

 Press the center (Sel) key to select a command and move down to

 Press the Help key at the lowest menu level to display help

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.

Press the Menu key to access the front panel command menu.

The first line identifies the output channel that is being controlled followed by the menu path. Since the top level is displayed, the path is empty.

The second line indicates the commands that are available at the present menu level. In this case, the top-level menu commands are shown, with the Output command highlighted.

The third line indicates which commands are available under the Output command. Selecting the highlighted command accesses this lower level.

the next level in the menu.

information about the function controls.

Press the right arrow f navigation key to traverse the menu until the Protect

Sel

command is highlighted. Press the Sel key to select the Protect command.

The menu path now shows that the commands shown on the second line are

Sel

located under the Protect command. The OVP command is highlighted. The third line indicates which functions are located under the OVP command. Press the Sel key to select the OVP command.

38 Series N6700 User’s Guide

Sel

4 4 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.

Press the Channel key at any time to select a different output channel. This can save time because you can directly access the OVP control of each channel without having to navigate through the menu levels.

NOTE

If you program an over-voltage protection level that is lower than the present output voltage, the over-voltage protection circuit will trip and turn the output channel off. The front panel status indicator will show OV.

Exiting the Command Menu

There are two ways to exit the command menu.

Meter

Back

Press the Meter key to immediately return to the metering screen. This is the quickest way to return to metering mode.

Press the Back key to back up one level at a time in the command menu. This method may be more convenient if there are other menu commands to be given.

Detailed instructions on how to use the power system’s functions and capabilities are found in the next chapter. Detailed information about the SCPI programming commands are found in the Programmer’s Reference Help file on your Agilent N6700 Product Reference CD.

In Case of Trouble

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 0L1). An electronic copy of the N6700 Service Guide is also included on the N6700 Product Reference CD-ROM.

Series N6700 User’s Guide 39

3 Getting Started

Connecting to the Interfaces

CAUTION

GPIB Interface

NOTE

Connect to GPIB Interface Card installed in PC.

Electrostatic discharges greater than 1 kV near the interface connectors may cause the unit to reset and require operator intervention.

The Agilent N6700 MPS supports GPIB, LAN, and USB interfaces. All three interfaces are live at power-on. The front panel IO indicator comes on whenever there is activity on the remote interfaces.

For detailed information about GPIB interface connections, refer to the Agilent 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 instrument to the General Purpose Interface Bus (GPIB). The following figure illustrates a typical GPIB interface system.

GPIB Cable

Instrument

Connect to GPIB port on instrument.

Instrument

1 If you have not already done so, install the Agilent IO Libraries

Suite from the Automation-Ready CD that is shipped with your product.

2 If you 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 Agilent 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 0 to 30. Press the Enter key to enter the value. Press the Meter key to exit the menu.

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.

40 Series N6700 User’s Guide

USB Interface

Getting Started 3

NOTE

For detailed information about USB interface connections, refer to the Agilent 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 Serial Bus (USB). The following figure illustrates a typical USB interface system.

USB Cable

Connect to USB port on PC.

Connect to USB port on instrument.

Instrument

1 If you have not already done so, install the Agilent IO 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 Agilent 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.

LAN Interface

NOTE

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\IO\USB\Identification.

5 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.

For detailed information about LAN interface connections, refer to the Agilent 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 connections that are discussed in this section are site networks and private networks.

Series N6700 User’s Guide 41

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 services such as DHCP and DNS servers.

To Network Interface Card (NIC)

To Site LAN

To LAN Port

NOTE

Instrument

1 If you have not already done so, install the Agilent 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 Agilent 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 instrument cannot be found, add the instrument using the instrument’s hostname or IP address.

NOTE

If this does not work, refer to the chapter on “Troubleshooting Guidelines” in the Agilent Technologies USB/LAN/GPIB Interfaces Connectivity Guide.

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. They are typically small, with no centrally-managed resources.

42 Series N6700 User’s Guide

Getting Started 3

NOTE

To Network Interface Card (NIC)

CAT5 Crossover Cable

To LAN Port

Instrument

1 If you have not already done so, install the Agilent IO 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 obtain 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 on a 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 Agilent 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 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 Agilent IO Libraries

NOTE

If this does not work, refer to the chapter on “Troubleshooting Guidelines” in the Agilent Technologies USB/LAN/GPIB Interfaces Connectivity Guide.

5 You can now use Interactive IO within the Connection Expert to

Series N6700 User’s Guide 43

3 Getting Started

LAN Parameters

Viewing the Currently Active LAN Settings

To view the currently active LAN settings, press the Menu key, then use the navigation keys to select: System\IO\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.

Power system mainframes with firmware revision C.00.00 and up 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. The front panel Lan indicator will come on when the LAN port is connected and configured.

Configuring the LAN Parameters

NOTE

The power system must be rebooted for any LAN parameter modifications to take effect.

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 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.

Select IP to configure the addressing of the instrument. The configurable parameters include:

Automatic 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 AutoIP. AutoIP automatically assigns an IP address, Subnet Mask, and Default Gateway addresses on networks that do not have a DHCP server.

Manual 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.

44 Series N6700 User’s Guide

Getting Started 3

IP Address 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 0 through 255.

Subnet Mask This value is used to enable the instrument to determine if a client IP

address is on the same local subnet. When a client IP address is on a different subnet, all packets must be sent to the Default Gateway.

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.

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.

Host name This field registers the supplied name with the selected naming service. 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.

Each power system is shipped with a default hostname with the format: Amodelnumber-serialnumber, where modelnumber is the mainframe’s 6character model 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.

Use Dynamic DNS

naming service

Use NetBIOS

naming service

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.

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.

Series N6700 User’s Guide 45

3 Getting Started

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.

Obtain DNS server

from DHCP

Use the following

DNS server

DNS Server This value is the address of the DNS server. It is used if you are not using

NOTE

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.

DHCP or if you need to connect to a specific DNS server.

For improved performance when connected to an isolated subnet, select Use

the following DNS server. However, leave the DNS server address field blank.

TCP

Select TCP to configure the TCP keepalive settings of the instrument.

Enable TCP

Keepalive

TCP keepalive

timeout

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 timeout 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.

LAN Communication

The Agilent IO Libraries Suite along with instrument drivers for specific programming environments can 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.

46 Series N6700 User’s Guide

Getting Started 3

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.

NOTE

The built-in Web server only operates over the LAN interface. It requires Internet Explorer 6+, Netscape 6.2+, 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, the tab functionality does not work with multiple connections. 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:

3 Click on the Browser Web Control button in the navigation bar

on the left to begin controlling your instrument.

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 & Modify Configuration button. Refer to the on-line help for additional information about setting a password.

Series N6700 User’s Guide 47

3 Getting Started

Using Telnet

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.

Using Sockets

NOTE

Power system mainframes with firmware revision C.00.00 and up installed allow any combination of up to four simultaneous data socket, control socket, and telnet connections to be made.

Agilent 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?

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 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.

48 Series N6700 User’s Guide

Securing the Interfaces

Enable/Disable the USB, LAN, and 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.

Enable USB Check this box to enable the USB.

Uncheck this box 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.

Enable LAN Check this box to enable the LAN. Uncheck this box to disable the LAN.

Getting Started 3

Enable Web

Server

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 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 right password.

If 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

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\IO\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.

Series N6700 User’s Guide 49

3 Getting Started

Factory-shipped non-volatile LAN settings

Get IP Address Automatic Dynamic DNS naming service Enabled

IP Address 169.254.67.0 NetBIOS naming service Enabled

Subnet Mask 255.255.0.0 Domain name Blank

Default Gateway 0.0.0.0 TCP keepalive Enabled

Obtain DNS server from DHCP Enabled TCP keepalive seconds 1800

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 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 Enabled

Front panel lockout Disabled Screen saver delay 60 minutes

Front panel meter view 1-channel USB interface Enabled

GPIB Address 5 Wake on I/O Enabled

Key clicks Enabled Web server Enabled

LAN interface Enabled

50 Series N6700 User’s Guide

4 Operating the Power System

Programming the Output ................................................................................. 52

Synchronizing Output Steps............................................................................ 55

Making Measurements.................................................................................... 58

Using the Protection Functions ......................................................................59

System-Related Operations ............................................................................. 61

Programming High-Speed Test Extensions.................................................. 65

This chapter contains examples on how to operate your power system from the front panel and over the remote interface using SCPI commands.

The simple examples discussed in this chapter show you how to program:

 Output voltage and current functions

 Protection functions

 Internal and external triggers

 Measurement functions

 System functions

 High-speed test extensions

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.

Series N6700 User’s Guide 51

4 Operating the Power System

Programming the Output

Select an Output Channel

Set the Output Voltage

Front Panel: SCPI Command:

Press the Channel key to select an output channel.

Front Panel: SCPI Command:

Press the Voltage key.

Enter a value and press Select.

For models with multiple ranges, you can select a lower range if you need better output resolution.

Front Panel: SCPI Command:

Press the Voltage key.

Select a lower range and press Select.

Enter the selected channel(s) in the command’s parameter list. (@1,2)

To set output 1 to 5 V:

VOLT 5,(@1)

To set all outputs to 10 V:

VOLT 10,(@1:4)

To select the lower range, program a value that falls within the range:

VOLT:RANG 5,(@1)

Set the Voltage Slew Rate

NOTE

The ability to program the voltage slew rate is only available on power system mainframes with firmware revision B.00.00 and up.

Front Panel: SCPI Command:

Select Output\Slew

Enter a slew rate in the Voltage Slew Rate field. Enter the value in volts/second. Check MAX to program the fastest slew rate.

When MAXimum, INFinity, or very large values are selected, the slew rate will be limited by the analog performance of the output circuit.

Also, the slowest or minimum slew rate is a function of the full-scale voltage range. For a model with a 50 V range, the minimum slew rate is about 4.76 V/s. For other voltage ranges the minimum slew rate is proportional to this value, so for a model with a 5 V range the minimum slew rate is about 0.476 V/s.

To set the slew rate to 5 V/s

VOLT:SLEW 5,(@1)

To set the fastest slew rate:

VOLT:SLEW MAX,(@1)

52 Series N6700 User’s Guide

Set the Output Current

Front Panel: SCPI Command:

Press the Current key.

Enter a value and press Select.

For models with multiple ranges, you can select a lower range if you need better output resolution.

Front Panel: SCPI Command:

Press the Current key.

Select a lower range and press Select.

Enable the Output

Front Panel: SCPI Command:

Press the On/Off key.

To enable/disable ALL outputs using the On/Off key, select System\Preferences\Keys. Check On/Off affects all channels.

The All indicator will be on.

Operating the Power System 4

To set output 1 to 1 A:

CURR 1,(@1)

To set all outputs to 2 A:

CURR 2,(@1:4)

To select the lower range, program a value that falls within the range:

CURR:RANG 1,(@1)

To enable only output 1:

OUTP ON,(@1)

To enable outputs 1-4:

OUTP ON,(@1:4)

Because of internal circuit start-up procedures and any installed relay 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.

Sequence Multiple Outputs

Turn-on and turn-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 an output. Then select Output\Delay.

Select either Turn-on or Turn-off. Enter a delay in seconds, then press Select.

Select System\Preferences\Keys. Check On/Off affects all channels.

To program a 50 millisecond turn-on delay for output 1 and a 100 millisecond turn-on delay for output 2:

OUTP:DEL:RISE .05,(@1) OUTP:DEL:RISE .1,(@2)

To program a 200 millisecond turn-off delay for outputs 3 and 4:

OUTP:DEL:FALL .2,(@3,4)

Series N6700 User’s Guide 53

4 Operating the Power System

Program the Output Relays

Output channel turn-on characteristics vary across the three module types - DC Power, Autoranging, and Precision (Refer to Appendix D for more information). When output channels of the same module type are programmed off-to-on, output sequencing is precisely determined by the programmed turn-on delays.

When outputs of different module types are sequenced, there may be an additional offset of a few milliseconds from one output to another. This offset is the same for each module type and is repeatable. Once you have characterized this offset, using an oscilloscope for example, you can adjust the programmed delays to compensate for the offset and give the desired output sequencing.

Outputs within the same module type can also have an offset if one model has output relays (Option 761) and another does not. These offsets are also repeatable and can be compensated by adjusting the programmed delay values.

Programmable output relays are available on power modules with Option 760 or Option 761. Option 761 provides double-pole, doublethrow relays that disconnect both the output and sense terminals. Option 760 is the same as option 761 but adds output reversal relays.

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.

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. 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\Polarity. Then check the Reverse box.

Uncheck the Reverse box to return the polarity to normal.

To switch the output and sense terminal polarities of output 1:

OUTP:REL:POL REV,(@1)

To return the polarities back to normal: OUTP:REL:POL NORM,(@1)

NOTE

54 Series N6700 User’s Guide

When the output polarity has been reversed, the voltage meter on the front panel display will show a bar over the voltage reading:

10.001V

Synchronizing Output Steps

The transient system lets you step the output voltage and current up or down in response to triggered events. To generate a triggered output step you must:

1. Enable the output to respond to trigger commands.

2. Set the voltage or current trigger levels.

3. Select the transient trigger source.

4. Initiate the trigger system and provide a trigger signal.

Enable the Output to Respond to Trigger Commands

First, you must enable the output to respond to trigger commands. Unless an output is enabled to respond to triggers, nothing will happen even if you have programmed a trigger level and generated a trigger for the output.

Use the following commands to enable an output to respond to triggers:

Front Panel: SCPI Command:

Select Transient\Mode.

For voltage step triggering, set the Voltage mode to Step. For current step triggering, set the Current mode to Step. Then press Select.

Operating the Power System 4

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 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.

Select the Trig Voltage box to set the voltage. Select the Trig Current box to set the current. Enter a value and press Select.

Series N6700 User’s Guide 55

To set a voltage and current trigger level for output 1 use:

VOLT:TRIG 15,(@1) CURR:TRIG 1,(@1)

4 Operating the Power System

Select the Transient Trigger Source

NOTE

Bus

Pin<n>

Transient

An immediate trigger command either from the front panel or over the bus will generate an immediate trigger regardless of the trigger source.

Unless you are using the front panel menu or a TRIG:TRAN command to trigger the output, select a trigger source from the following:

Selects GPIB device trigger, *TRG, or <GET> (Group Execute Trigger).

Selects a pin on the external port connector as the trigger source. <n> 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).

<n> Selects the output channel’s transient system as the trigger source.

<n> 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”.

Use the following commands to select a trigger source:

Front 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)

where n is the pin number.

To select Transient output triggers:

TRIG:TRAN:SOUR TRAN<n>,(@1)

where n is the output channel that will generate the trigger signal.

Initiate the Transient Trigger System

Next, you must initiate or enable the transient trigger system.

When the power system is turned on, the trigger system is in the idle state. In this state, the trigger system is disabled, ignoring all triggers. Initiating the trigger system moves it from the idle state to the initiated state, which enables the power system to receive triggers. To initiate the trigger system, use:

Front Panel: SCPI Command:

Select the Transient\Control.

Scroll to Initiate and press Select.

After a trigger is received and the action completes, the trigger system returns to the idle state. Thus, it will be necessary to enable the system each time a triggered action is desired.

56 Series N6700 User’s Guide

To initiate the output trigger system for all four outputs:

INIT:TRAN (@1:4)

Trigger the Output

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.

Select Trigger to generate an immediate trigger signal regardless of the trigger source setting.

When a trigger is received, the triggered functions are set to their programmed trigger levels. When the triggered actions are completed, the trigger system returns to the idle state.

As previously discussed, a trigger can also be generated by another output channel or by a trigger signal applied to an input pin on the digital port connector. If any of these systems are configured as the trigger source, the instrument will wait indefinitely for the trigger signal. If the trigger does not occur, you must manually return the trigger system to the idle state.

Operating the Power System 4

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

The following commands return the trigger system to the idle state:

Front Panel: SCPI Command:

Select Transient\Control. Scroll to and select Abort.

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 channel that is the trigger source. Select Transient\Step.

Check Enable Trigger Output. Then press Select.

ABOR:TRAN (@1)

To program channel 3’s step function to generate a trigger signal, use STEP:TOUT ON,(@3)

Series N6700 User’s Guide 57

4 Operating the Power System

Making Measurements

Simultaneous Voltage and Current Measurements

Each output channel has its own measurement capability. The output voltage and current is measured by acquiring a number of samples at the selected time interval, applying a window function to the samples, and averaging the samples.

The power-on and *RST time interval and number of samples settings yield a measurement time of 21 milliseconds per reading (1024 data points at 20.48 μs intervals). The output windowing function is Rectangular. Use the following commands to make a measurement:

Front Panel: SCPI Command:

Select the Meter key. To measure average voltage or current:

MEAS:VOLT?(@1:4) MEAS:CURR?(@1:4)

Some models have simultaneous voltage and current measurement capability (Refer to Chapter 1, “Model Differences”). In this case BOTH voltage and current are acquired on any measurement, regardless of the parameter that is being measured. To return both values of a simultaneous measurement:

Front Panel: SCPI Command:

Not available.

First, measure the output voltage (or current):

MEAS:VOLT?(@1:4)

Then Fetch the other parameter: FETC:CURR?(@1:4)

Measurement Ranges

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.

Select a range and 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 > 0.1 A and ≤ 3.06 A.

0.10 A range To select, program values > 200 μA and ≤ 0.1 A.

200 μA range (option 2UA)

58 Series N6700 User’s Guide

To select, program values ≤ 200 μA.

SENS:CURR:RANG 0.1, (@1) SENS:VOLT:RANG 5, (@1)

Using the Protection Functions

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, OC, PROT, and INH are user- programmable.

Operating the Power System 4

CP+

PROT

INH

Over-voltage protection is a hardware OVP whose trip level is a programmable value. The OVP is always enabled.

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.

PF indicates that a power fail condition on the AC mains has disabled the output.

CP+ indicates that a positive current 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 because of a coupled protection signal from another output.

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

The over-voltage protection function turns off the affected output if the output voltage reaches the programmed over-voltage limit.

Front Panel: SCPI Command:

Select Protect\OVP.

Enter a value in the OVP level box and press Select.

To set the OVP level for outputs 1 and 2 to 10 V: VOLT:PROT 10,(@1,2)

Set the Over-Current Protection

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.

Check Enable OCP and press Select.

Series N6700 User’s Guide 59

To enable OCP for outputs 1 and 2: CURR:PROT:STAT 1,(@1,2)

4 Operating the Power System

Couple Output Protection

You can also specify a delay to prevent momentary CV-to-CC status changes from tripping the over-current protection.

Front Panel: SCPI Command:

Select Protect\OCP.

Enter a delay value and press Select.

Check "Start delay on CC" to start the delay timer by ANY output transition into CC mode. Otherwise, the delay timer will only be started by a settings change in voltage, current, or output state.

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 specify a 10 millisecond delay:

OUTP:PROT:DEL 0.01,(@1,2)

To start the delay timer by ANY output transition into CC mode:

CURR:PROT:DEL:STAR CCTR, (@1,2)

To start the delay timer by a settings change in voltage current or output:

CURR:PROT:DEL:STAR SCH, (@1,2)

To enable output protection coupling: OUTP:PROT:COUP ON

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 power system turns off the affected output channel. The appropriate operating status indicator on the front panel will be on (e.g. OV, OC, OT, PF, CP+, PROT, INH). 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.

Select the Clear button.

To clear a protection fault on output 1: OUTP:PROT:CLE(@1)

60 Series N6700 User’s Guide

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.

Instrument Identification

For Agilent 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. or

Select System\About\Module.

Operating the Power System 4

*TST?

*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 overwritten.

Front Panel: SCPI Command:

Select States\SaveRecall.

In the SaveRecall field, enter a location from 0 to 1, and press Select. Select Save to save the 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 0 at power-on.

Front Panel: SCPI Command:

Select States\PowerOn.

Select Recall State 0, then press Select.

To save a state:

*SAV <n>

To recall a state:

*RCL <n>

OUTP:PON:STAT RCL0

Series N6700 User’s Guide 61

4 Operating the Power System

Output Groups

NOTE

The ability to group outputs is only available on power system mainframes with firmware revision B.00.00 and up.

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 for grouped channels:

 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 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 Agilent N673xB, N674xB,

and N677xA

power modules are grouped. Refer to Appendix C.

Front Panel: SCPI Command:

Select System\Groups.

In the matrix that appears, select the channels you want to group. Each row defines a separate group.

To configure a group of channels:

SYST:GRO:DEF (@2,3,4)

This groups channels 2 through 4. To address the group, use channel 2.

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.

In the matrix, place each output

To ungroup all channels:

SYST:GRO:DEL:ALL

channel in its own separate group.

Reboot the unit for the grouping or ungrouping changes to take effect.

Front Panel: SCPI Command:

Cycle AC power.

SYST:REB

62 Series N6700 User’s Guide

Front Panel Keys

Lockout

Operating the Power System 4

NOTE

The ability to lock the front panel from the front panel is only available on power system mainframes with firmware revision B.00.00 and up.

You can lock the front panel keys to prevent unwanted control of the instrument from the front panel. This is the most 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 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 Agilent 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.

Not Available

Keys

You can enable or disable the front panel key clicks.

Front Panel: SCPI Command:

Select System\Preferences\Keys

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 System\Preferences\Keys. Check On/Off key affects all channels.

The ON/Off key will now be active on ALL channels. The All indicator will be on.

Series N6700 User’s Guide 63

Not Available

4 Operating the Power System

Front Panel Display

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. 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.

If the Wake on I/O 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

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 I/O bus activity.

Not Available.

Contrast

You can set the contrast of the front panel display to compensate for ambient lighting conditions. The contrast can be set from 0% to 100% in increments of 1%. As-shipped, the contrast is set to 50%.

Front Panel: SCPI Command:

Select System\Preferences\Display\Contrast

Enter a contrast value in the Contrast box. Then Press Select.

Not Available.

View

You can specify how the output channels are displayed at turn on.

Front Panel: SCPI Command:

Select System\Preferences\Display\View

Check 1-channel to display channel one. Check 4-channel to display all channels.

64 Series N6700 User’s Guide

To display all channels:

DISP:VIEW METER4

Programming High-Speed Test Extensions

Operating the Power System 4

NOTE

The High-Speed Test Extensions described in this section are not available on all models (Refer to Chapter 1, “Model Differences”).

The List Function

Either output voltage or output current, or both together, may be listcontrolled. 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 0 to 262.144 seconds. The default dwell time is 0.001 seconds.

If you need an output list to closely follow external events, then a trigger-paced list is more appropriate. In a trigger-paced list, the list advances one step for each trigger received. As previously discussed, a number of trigger sources can be selected to generate triggers. With a trigger-paced list, you do not need to program a dwell time for each step. If you do program a dwell time, triggers that are received during the dwell period are ignored.

NOTE

Voltage and current lists can also be configured to generate trigger signals at specified steps. This is accomplished by two additional lists: a beginning-of-step (BOST) and an end-of-step (EOST) list. These lists define which steps will generate a trigger signal and if the trigger occurs at the beginning or end of the step. These trigger signals can be used to synchronize other events with the list.

When either a voltage or current list is programmed, the associated dwell, BOST, and EOST lists must all be set to the same number of steps, otherwise an error will occur when the list is run. For convenience, a list may be programmed with only one step or value. In this case, a single-step list is treated as if it had the same number of steps as the other lists, with all values being equal to the one value.

List data is not stored in non-volatile memory. This means that list data that is sent to the instrument either from the front panel or over the bus will be lost when the power system is turned off.

Series N6700 User’s Guide 65

4 Operating the Power System

Program an Output Pulse or Pulse Train

Step 1. Set the voltage or current function for which you want to generate a

Step 2. Set the amplitude and width of the pulse. For example, to generate a

The following procedure shows how to generate an output pulse train using the List function.

Trigger

Pulse width

Off

time

List Count = 1+additional pulses

pulse to List mode. This example programs a voltage pulse.

Front Panel: SCPI Command:

Select Transient\Mode. Set the voltage mode to List. Press Select.

To program output 1, use VOLT:MODE LIST, (@1)

pulse with an amplitude of 15 V and a pulse width of 1 second, use:

Front Panel: SCPI Command:

Select Transient\List\Config.

Select List Step 0 and enter a voltage value of 15. Press Select.

To program output 1, use

LIST:VOLT 15, (@1) LIST:DWEL 1, (@1)

Enter a dwell value of 1 for List Step 0 and Press Select.

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.

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.

Step 4. If you want to generate a pulse train, you must specify the off time

between pulses. To do this you must program another step. For a voltage list, you must specify an amplitude and an off time. For example, to program an off time of 2 seconds with an amplitude of 0 V between pulses, use:

Front Panel: SCPI Command:

Select Transient\List\Config.

Select List Step 1 and enter a voltage value of 0. Press Select.

To program output 1, use

LIST:VOLT 15,0, (@1) LIST:DWEL 1,2, (@1)

Enter a dwell value of 2 for List Step 1 and Press Select.

66 Series N6700 User’s Guide

Operating the Power System 4

Step 5. To generate a pulse train, you can simply repeat the pulse as needed.

For example, to program a pulse train of 50 pulses, use:

Front Panel: SCPI Command:

Select Transient\List\Repeat.

Enter the number of list repetitions (50) and Press Select.

Step 6. Specify if you want the output pulse to generate a trigger signal that

can be used to trigger actions on other output channels or on any external equipment connected to the digital port. For example, to generate a trigger signal at the end of the pulse, use:

Front Panel: SCPI Command:

Select Transient\List\Config.

Select List Step 0 and check the Tout Step box. Press Select.

To program output 1, use LIST:COUN 50, (@1)

To program a trigger at the End of the pulse for output 1, use

LIST:TOUT:EOST 1,0, (@1)

You must program a value of 0 (no trigger) for step 1 as a placeholder.

Step 7. Specify the output state after the pulse has completed. For example,

to return the output to the state it was in before the pulse, use:

Front Panel: SCPI Command:

Select Transient\List\Terminate.

Select Return to Start. Press Select.

Step 8. Select the trigger source that will generate the pulse or pulse train.

For example, to select Bus triggers as the trigger source, use:

Front Panel: SCPI Command:

Select Transient\TrigSource.

Select Bus and press Select.

Step 9. Initiate the output trigger system. To enable the trigger system for

one transient event or trigger use:

Front Panel: SCPI Command:

Select the Transient\Control. Select Initiate and Press Select.

Step 10. Trigger the output pulse or pulse train.

Front Panel: SCPI Command:

Select Transient\Control. Select Trigger and Press Select.

To program output 1, use LIST:TERM:LAST 0, (@1)

To program output 1, use: TRIG:TRAN:SOUR BUS, (@1)

To program output 1, use

INIT:TRAN (@1)

*TRG

Series N6700 User’s Guide 67

4 Operating the Power System

Program an Arbitrary List

Trigger

Step 1. Set the function, voltage or current, for which you want to generate a

Step 2. Program the list of values for the List function. The order in which

The following procedure shows how to generate the list of voltage changes as illustrated in the following figure.

02 34 5

List Count = 1

List Count = 2

list to List mode. This example programs a voltage list.

Front Panel: SCPI Command:

Select Transient\Mode. Set the Voltage mode to List. Press Select.

To program output 1, use VOLT:MODE LIST, (@1)

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, 0

Front Panel: SCPI Command:

Select Transient\List\Config.

Select the List Step number and

To program output 1, use

LIST:VOLT 9,0,6,0,3,0, (@1)

enter a voltage value. Press Select.

Repeat this for each step. Use the © ª keys to select the next step.

Step 3. Determine the time interval, in seconds, that the output remains at

each step in the list before it advances to the next step. To specify the six dwell intervals in the figure, a list may include the following values: 2, 3, 5, 3, 7, 3

Front Panel: SCPI Command:

Select Transient\List\Config.

Select the List Step number and

To program output 1, use

LIST:DWEL 2,3,5,3,7,3, (@1)

enter a dwell value. Press Select.

Repeat this for each step. Use the © ª keys to select the next step.

NOTE

The number of dwell steps must equal the number of voltage steps. If a dwell list has only one value, that value will be applied to all steps in the list.

Step 4. Determine how the list is paced. To pace the list by dwell time, set

the list pacing to Dwell-paced on the front panel menu. (Set the LIST:STEP command to AUTO.) As each dwell time elapses, the next step is immediately output.

68 Series N6700 User’s Guide

Operating the Power System 4

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 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.

Step 5. Specify if you want the list to generate trigger signals that can be

used to trigger actions on other output channels or on external equipment connected to the digital port.

Front Panel: SCPI Command:

Select Transient\List\Config.

Select the List Step number. To generate a trigger, enter a 1 in the Tout Begin Step or Tout End Step field. If a zero is entered, no trigger is generated for the step.

Repeat this for each step. Use the

To program a trigger at the beginning of step 4 for output 1, use

LIST:TOUT:BOST 0,0,0,0,1,0, @(1)

To program a trigger at the end of step 0, 2, and 4 for output 1, use

LIST:TOUT:EOST 1,0,1,0,1,0, (@1)

02 34 5 1

Trigger at BOST

02 34 5

Trigger at EOST

Step 6. 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.

Select Stop Last Step. Press Select.

To program output 1, use LIST:TERM:LAST 1, (@1)

Step 7. If applicable, specify how many times you want the list to repeat.

Sending the INFinity parameter in the SCPI command makes the list repeat indefinitely. At reset, the list count is set to 1.

Front Panel: SCPI Command:

Select the Transient\List\Repeat.

Enter the number of list repetitions (2) and Press Select.

To program the output 1 list to repeat 2 times, use LIST:COUN 2, (@1)

Step 8. Select a trigger source, initiate, and trigger the list. This is described

in detail under "Synchronizing Output Steps".

Series N6700 User’s Guide 69

4 Operating the Power System

The Digitizer Function

The digitizer function lets you access the enhanced voltage and current measurement capabilities of the power system. You can:

 Adjust the measurement sample rate - to a maximum of 50 kHz.

 Adjust measurement triggers to capture pre-trigger transients.

 Select a measurement window that can attenuate AC noise.

 Retrieve arrays of the digitized current or voltage measurement.

 Synchronize measurements using trigger signals.

NOTE

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

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

OCCURS

Ripple rejection is a function of the number of cycles of the ripple frequency contained in the acquisition window. More cycles in the acquisition window results in better ripple rejection. You can vary the measurement data sampling rate using the following commands:

Front Panel: SCPI Command:

Select Measure\Sweep.

Enter the points and press Select. Scroll to Time Interval, enter a value and press Select again.

*The time interval is rounded to the nearest 20.48µs interval, which is 61.44µs.

MEASUREMENT SAMPLE (POINT )

TIME INTERVAL BETW EEN SAMPLES

ACQUISITION TIME

(TIME INTERVAL X #SAMPLES - 1)

For example, to set the time interval to 60µs* with 4096 samples, use:

SENS:SWE:TINT 60E-6, (@1) SENS:SWE:POIN 4096, (@1)

Acquire Pre-trigger Data

The measurement system lets you capture data before, after, or at the trigger signal. As shown in the following figure, you can move the block of data being read into the acquisition buffer with reference to the trigger. This allows pre- or post-trigger data sampling.

70 Series N6700 User’s Guide

4096 DATA POINTS

OFFSET = -4095

4096 DATA POINTS

OFFSET = -2048

Operating the Power System 4

4096 DATA POINTS

OFFSET = 0

TIME

NOTE

OFFSET = 0 to 2

TRIGGER

4096 DATA POINTS

To offset the beginning of the acquisition buffer relative to the acquisition trigger, use:

Front Panel: SCPI Command:

Select Measure\Sweep.

Enter an offset value and press Select.

To offset the measurement on channel 1 by 100 points use:

SENS:SWE:OFFS:POIN 100,(@1)

With a negative offset, values at the beginning of the buffer represent samples taken prior to the trigger. When the value is 0, all values are taken after the trigger. Values greater than 0 can be used to program a delay time from the receipt of the trigger until the values entered into the buffer are valid. (Delay time = offset x sample period).

If, during a pre-trigger data acquisition, a trigger occurs before the pre-trigger data count is completed, the measurement system ignores this trigger. This will prevent the completion of the measurement if another trigger is not generated.

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 nonintegral 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 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.

Series N6700 User’s Guide 71

weighting function to the data

4 Operating the Power System

To select a window function, use:

Front Panel: SCPI Command:

Select Measure\Window.

Then select either Rectangular or Hanning and press Select.

To set the sense window to Hanning for output 1 use: SENS:WIND HANN, (@1)

Retrieve Measurement Array Data

Array queries return all values in the voltage and current measurement buffer. No averaging is applied, only raw data is returned from the buffer. The following commands initiate and trigger a measurement and return the measurement array:

Front Panel: SCPI Command:

Not Available

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

MEAS:ARR:VOLT?(@1:4) MEAS:ARR:CURR?(@1:4)

FETC:ARR:VOLT?(@1:4) FETC:ARR:CURR?(@1:4)

If a FETCh query is sent before the measurement is started or before it is finished, the response will be delayed until the measurement trigger occurs and the acquisition completes. This may tie up the computer if the measurement trigger does not occur immediately.

Synchronizing Digitizer Measurements

Use the measurement trigger system to synchronize the acquisition of measurements with 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:

1. Select the measurement function to trigger.

2. Select the trigger source.

3. Initiate the trigger system and generate a trigger.

4. Fetch the triggered measurements.

Select the Measurement Function to Trigger

Some models have two measurement converters, which allow simultaneous voltage and current measurements (Refer to Chapter 1, “Model Differences”). If a power model has only one converter and a triggered measurement is initiated, the parameter that it measures (either voltage or current) must be specified.

72 Series N6700 User’s Guide

Operating the Power System 4

To trigger measurements on models that do not have simultaneous voltage and current measurement capability, select the measurement function as follows.

Front Panel: SCPI Command:

Not Available To select the measurement function:

SENS:FUNC ”VOLT”,(@1:4) SENS:FUNC ”CURR”,(@1:4)

If a model has simultaneous voltage and current measurements capability, then BOTH voltage and current are acquired on any triggered measurement, regardless of the setting of the SENSe:FUNCtion command.

Select the Measurement Trigger Source

NOTE

An immediate trigger command over the bus will generate an immediate trigger regardless of the trigger source.

Unless you are using a TRIG:ACQ command to trigger the measurement, select a trigger source from the following:

Bus Selects GPIB device trigger, *TRG, or <GET> (Group Execute Trigger).

Pin<n> Selects a pin on the external port connector as the trigger source.

<n> 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).

Transient

<n>

Selects the output channel’s transient system as the trigger source. <n> 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” 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 Digital pin triggers:

TRIG:ACQ:SOUR PIN<n>,(@1)

where n is the pin number.

To select Transient output triggers:

TRIG:ACQ:SOUR TRAN<n>,(@1)

where n is the output channel that will generate the trigger signal.

Series N6700 User’s Guide 73

4 Operating the Power System

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 measurement system to receive triggers. To initiate the measurement trigger system, use:

Front Panel: SCPI Command:

Not Available To initiate the measurement trigger

system for all four outputs: INIT:ACQ (@1:4)

After a trigger is received and the data acquisition completes, the trigger system will return to the idle state. Thus, it will be necessary to initiate the measurement system each time a triggered measurement is desired.

Trigger the Measurement

The trigger system is waiting for a trigger signal in the initiated state. You can immediately trigger the measurement as follows:

Front Panel: SCPI Command:

Not Available To generate a measurement trigger

on output 1:

TRIG:ACQ (@1)

Alternatively, if the trigger source is BUS, you can also program a *TRG or an IEEE-488 <get> command.

As previously discussed, a trigger can also be generated by another output channel or an input pin on the digital port connector. If any of these systems are configured as the trigger source, the instrument will wait indefinitely for the trigger signal. If the trigger does not occur, you must manually return the trigger system to the idle state.

The following commands return the trigger system to the idle state:

Front Panel: SCPI Command:

Select Measure\Control.

Then select the Abort control.

74 Series N6700 User’s Guide

ABOR:ACQ (@1)

Appendix A Specifications

Agilent Models N6751A/N6752A, N6753A/N6754A, N6761A/N6762A76

Agilent Models N6731B - N6736B and N6741B - N6746B........................ 82

Agilent Models N6773A - N6776A.................................................................84

Agilent N6700B, N6701A, N6702A MPS Mainframes................................86

This chapter lists the specifications and supplemental characteristics of the Agilent N6700 Modular Power System. A dimensional line drawing of the mainframe is included at the end of the chapter.

Unless otherwise noted, specifications are warranted over the ambient temperature range of 0 to 55°C after a 30-minute warm-up period, with each module's sense terminals externally jumpered directly to their respective output terminals (local sensing).

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.

Series N6700 User’s Guide 75

Appendix A Specifications

Agilent Models N6751A/N6752A, N6753A/N6754A, N6761A/N6762A

Performance Specifications

N6751A / N6752A N6753A N6754A N6761A / N6762A

DC Output Ratings:

Voltage 50 V 20 V 60 V 50 V

Current (derated 1% per °C above 40°C) 5 A / 10A 50 A 20 A 1.5 A / 3 A

Power 50 W / 100 W 300 W 300 W 50 W / 100 W

Output Ripple and Noise (PARD):

(from 20 Hz – 20 MHz)

CV peak-to-peak 4.5 mV 5 mV 6 mV 4.5 mV

CV rms 0.35 mV 1 mV 1 mV 0.35 mV

Load Effect (Regulation):

(for any output load change, with a maximum load-lead drop of 1V/lead)

Voltage 2 mV 2 mV 2 mV 0.5 mV

Current 2 mA 12 mA 5 mA

Source Effect (Regulation):

Voltage 1 mV 0.5 mV 1.2 mV 0.5 mV

Current 1 mA 5 mA 2 mA

Programming Accuracy:

(@ 23 °C ±5 °C after 30 min. warm-up. Applies from min. to max. programming range)

Voltage high range 0.06% + 19 mV

Voltage low range (≤ 5.5 V)

N/A N/A N/A 0.016% + 1.5 mV

Current high range 0.1% + 20 mA 0.1% + 30 mA 0.1% + 12 mA

Current low range (≤ 100mA, @ 0 - 7 V) (≤ 100mA, @ 7 - 50 V)

N/A N/A

0.06% + 10 mV 0.06% + 25 mV

N/A N/A

Measurement Accuracy:

(at 23 °C ±5 °C)

Voltage high range 0.05% + 20 mV

Voltage low range (≤ 5.5 V)

N/A N/A N/A 0.016% + 1.5 mV

Current high range 0.1% + 4 mA 0.1% + 30 mA 0.1% + 8 mA

Current low range (≤ 100mA, @ 0 - 7 V) (≤ 100mA, @ 7 - 50 V)

200 μA current range (Option 2UA)

N/A N/A

N/A N/A N/A 0.5% + 100 nA

0.05% + 10 mV 0.05% + 25 mV

N/A N/A

Load Transient Recovery Time: (time to recover to within the settling band following a load change

- from 60% to 100% and from 100% to 60% of full load for models N6751A & N6761A

- from 50% to 100% and from 100% to 50% of full load for models N6752A, N6762A, N6753A, & N6754A.)

Voltage settling band ± 75 mV

Time

Applies when measuring 4096 data points (SENSe:SWEep:POINts = 4096).

When relay option 761 is installed, the settling band is ±125 mV for Model N6752A.

When relay option 760 or 761 is installed, the settling band is ±200 mV for Model N6753A.

When relay option 760 or 761 is installed, the settling band is ±350 mV for Model N6754A.

NOTE 2

± 30 mV

< 100 μs < 100 μs < 100 μs < 100 μs

NOTE 3

± 90 mV

NOTE 4

30 μA (@ 0 – 7 V)

65 μA (@ 7 – 50 V)

30 μA

0.016% + 6 mV

0.04% + 200 μA

0.04% + 15 μA

0.04% + 55 μA

0.016% + 6 mV

0.04% + 160 μA

0.03% + 15 μA

0.03% + 55 μA

± 75 mV

NOTE 1

76 Series N6700 User’s Guide

Specifications Appendix A

Supplemental Characteristics

N6751A / N6752A N6753A N6754A N6761A / N6762A

Programming Ranges:

Voltage high range 20 mV – 51 V 10 mV – 20.4V 25 mV- 61.2V 15 mV – 51 V

Voltage low range (≤ 5.5 V) N/A N/A N/A 12 mV – 5.5 V

Current high range

10 mA – 5.1A/10 mA- 10.2A

50 mA – 51A 20 mA- 20.4A

Current low range (≤ 0.1 A) N/A N/A N/A 0.1 mA – 0.1 A

Programming Resolution:

Voltage high range 3.5 mV 1.5 mV 4.2 mV 880 μV

Voltage low range (≤ 5.5 V) N/A N/A N/A 90 μV

Current high range 3.25 mA 16.3 mA 6.5 mA 60 μA

Current low range (≤ 0.1 A) N/A N/A N/A 2 μA

Measurement Resolution:

Voltage high range 1.8 mV 0.8 mV 2.2 mV 440 μV

Voltage low range (≤ 5.5 V) N/A N/A N/A 44 μV

Current high range 410 μA 2.05 mA 0.82 mA 30 μA

Current low range (≤ 0.1 A) N/A N/A N/A 1 μA

200 μA current range (Option 2UA) N/A N/A N/A 2 nA

Programming Temperature Coefficient per °C:

Voltage high range 18 ppm + 160 μV

Voltage low range (≤ 5.5 V) N/A N/A N/A 40 ppm + 70 μV

Current high range 100 ppm + 45 μA

Current low range (≤ 0.1 A) N/A N/A N/A 60 ppm + 1.5 μA

20 ppm + 20 μV 20 ppm + 50 μV

60ppm + 500 μA 60ppm + 200 μA

Measurement Temperature Coefficient per °C:

Voltage high range 25 ppm + 35 μV

Voltage low range (≤ 5.5 V) N/A N/A N/A 30 ppm + 40 μV

Current high range 60 ppm + 3 μA

Current low range (≤ 0.1 A) N/A N/A N/A 50 ppm + 0.3 μA

200 μA current range (Option 2UA) N/A N/A N/A 100 ppm + 3 nA/°C

20 ppm + 20 μV 20 ppm + 50 μV

60 ppm + 30 μA 60 ppm + 12 μA

Output Ripple and Noise: (PARD)

CC rm: 2 mA 10 mA 4 mA 2 mA

Common Mode Noise: (from 20 Hz – 20 MHz; from either output to chassis)

rms

peak-to-peak < 2 mA < 2 mA < 3 mA < 2 mA

500 μA 500 μA 750 μA 500 μA

Over-voltage Protection:

Accuracy 0.25% + 0.25 V 0.25% + 0.45V 0.25% + 0.6V 0.25% + 0.25 V

Maximum setting 55 V 22 V 66 V 55 V

Response time 50 μs from occurrence of over-voltage condition to start of output shutdown

Remote Sense Capability:

Outputs can maintain specifications with up to a 1-volt drop per load lead.

Series and Parallel Operation:

Identically rated outputs can be operated directly in parallel or be connected for straight

If you are operating the unit below 255 μA in constant current mode, the output may become unregulated with the following load conditions: The load resistance is <175 mΩ and the load inductance is >20 μH. If this occurs, an UNRegulated flag will be generated and the output current may rise above the programmed value but will remain less than 255 μA.

series operation. Auto-series and auto-parallel operation is not available.

1 mA–1.53 A/1 mA–3.06 A

NOTE 1

18 ppm + 140 μV

33 ppm + 10 μA

23 ppm + 40 μV

40 ppm + 0.3 μA

Series N6700 User’s Guide 77

Appendix A Specifications

Supplemental Characteristics (continued)

N6751A / N6752A N6753A N6754A N6761A / N6762A

Up-programming Time with full resistive load:

(time f

rom 10% to 90% of total voltage excursion)

Small voltage step 0 V to 10 V 0 V to 6 V 0 V to 15 V 0 V to 10 V

Time 0.2 ms 0.4 ms 0.35 ms 0.6 ms

Large voltage step 0 V to 50 V 0 V to 20 V 0 V to 60 V 0 V to 50 V

Time 1.5 ms 1.5 ms 2 ms 2.2 ms

Up-programming Settling Time with full resistive load:

(time from start of voltage change to output voltage within 0.1% of full scale value)

Small voltage step 0 V to 10 V 0 V to 6 V 0 V to 15 V 0 V to 10 V

Time 0.5 ms 0.8 ms 0.8 ms 0.9 ms

Large voltage step 0 V to 50 V 0 V to 20 V 0 V to 60 V 0 V to 50 V

Time 4 ms 3 ms 4.2 ms 4 ms

Down-programming Time with no load:

(time f

rom start of voltage change to output voltage < 0.5 V)

Small voltage step 10 V to 0 V 6 V to 0 V 15 V to 0 V 10 V to 0 V

Time 0.3 ms 0.55 ms 0.6 ms 0.3 ms

Large voltage step 50 V to 0 V 20 V to 0 V 60 V to 0 V 50 V to 0 V

Time 1.3 ms 1.8 ms 2.2 ms 1.3 ms

Down-programming Settling Time with no load:

(time f

rom start of voltage change to output voltage within 0.1% of full scale value)

Small voltage step 10 V to 0 V 6 V to 0 V 15 V to 0 V 10 V to 0 V

Time 0.45 ms 0.8 ms 0.8 ms 0.45 ms

Large voltage step 50 V to 0 V 20 V to 0 V 60 V to 0 V 50 V to 0 V

Time 1.4 ms 2 ms 2.3 ms 1.4 ms

Down-programming Time with Capacitive load:

(time f

rom start of voltage change to output voltage < 0.5 V)

Small voltage step 10 V to 0 V 6 V to 0 V 15 V to 0 V 10 V to 0 V

Time 2.1 ms 2.2 ms 2.3 ms 4.5 ms

Large voltage step 50 V to 0 V 20 V to 0 V 60 V to 0 V 50 V to 0 V

Time 11 ms 8.5 ms 10 ms 23 ms

Capacitive load

1000µF

NOTE 2

4700µF

Down-programming Capability:

Continuous power 7 W 12.5 W 12.5 W 7 W

Peak current 7 A 15 A 6 A 3.8 A

High-Speed Test Extensions:

High-speed test extensions are included in Models

N676xA and are available

as Option 054 in Models N675xA.

Modules can discharge a 1000µF capacitor from full scale to 0V at a rate of 4 times/second.

Modules can discharge a 4700µF capacitor from full scale to 0V at a rate of 4 times/second.

Modules can discharge a 680µF capacitor from full scale to 0V at a rate of 4 times/second.

Maximum number of List steps = 512 Maximum List dwell time in seconds = 262 Maximum List repetitions = 256, or infinite Maximum measurement points = 4096 Maximum sample rate = 50 kHz

NOTE 3

680µF

NOTE 4

1000µF

NOTE 2

78 Series N6700 User’s Guide

Autoranging Characteristic

Specifications Appendix A

Voltage

50 V

10 V

320

160

IMPEDANCE (milliohms)

2.5

1.25

Autoranging 50 W Output

1 A

Magnitude

50 W curve

5 A

Current

Voltage

Autoranging

100 W Output

50 V

100 W curve

12 V

8.5 V

2 A

8.33 A

10 A

Output Impedance Graphs

Phase

Current

135

-45

320

160

2.5

60 V 20 V

15 V

Voltage

6 V

Autoranging

300 W Output

5 A

15 A

Magnitude

300 W curve

Current

20 A 50 A

Voltage

50 V

33 V

Precision

50 W & 100 W

1 A

1.5 A

2 A

3 A

Outputs

Current

- 50 W

- 100 W

Phase

135

-45

PHASE (degrees)

100

FREQUENCY (Hz)

Model N6752A, CV Mode, @50V, 2A

10k 100k

100

FREQUENCY (Hz)

10k 100k

Model N6762A, CV Mode, @50V, 2A

IMPEDANCE (ohms)

0.25

0.125

0.062

0.5

100

Magnitude

FREQUENCY (Hz)

Model N6752A, CC Mode, @50V, 2A

Phase

10k 100k

-45

-90

Magnitude

0.5

0.25

0.125

100

FREQUENCY (Hz)

10k 100k

Phase

-45

-90

Model N6762A, CC Mode, @50V, 2A

PHASE (degrees)

Series N6700 User’s Guide 79

Appendix A Specifications

-45

-90

2.5

1.25

0.62

100

Magnitude

FREQUENCY (Hz)

10k 100k

Phase

135

-45

Model N6753A, Option 760, CV Mode, @20V, 15A

IMPEDANCE (milliohms)

2.5

1.25

0.62

Magnitude

100

FREQUENCY (Hz)

10k 100k

Model N6753A, CV Mode, @20V, 15A

Phase

-45

-90

-135

0.8

0.4

0.2

0.1

0.05

0.025

0.0125

0.0062

Magnitude

Phase

-45

-90

IMPEDANCE (ohms)

0.025

0.0125

0.0062

0.8

0.4

0.2

0.1

0.05

Magnitude

Phase

PHASE (degrees)

100

FREQUENCY (Hz)

10k 100k

Model N6753A, CC Mode, @20V, 15A

100

FREQUENCY (Hz)

Model N6753A, Option 760, CC Mode, @20V, 15A

10k 100k

80 Series N6700 User’s Guide

Specifications Appendix A

-45

-90

0.8

0.4

0.2

0.1

0.05

0.025

0.0125

0.0062

Magnitude

100

FREQUENCY (Hz)

10k 100k

Model N6754A, Option 760, CV Mode, @60V, 5A

Phase

-45

-90

0.8

0.4

0.2

0.1

0.05

IMPEDANCE (ohms)

0.025

0.0125

0.0062

100

Magnitude

FREQUENCY (Hz)

Model N6754A, CV Mode, @60V, 5A

Phase

10k 100k

-45

-90

-135

0.5

0.25

0.125

0.062

Magnitude

Phase

-45

-90

-135

IMPEDANCE (ohms)

0.5

0.25

0.125

0.062

Magnitude

Phase

PHASE (degrees)

100

FREQUENCY (Hz)

10k 100k

Model N6754A, CC Mode, @60V, 5A

100

Model N6754A, Option 760, CC Mode, @60V, 5A

FREQUENCY (Hz)

10k 100k

Series N6700 User’s Guide 81

Appendix A Specifications

Agilent Models N6731B - N6736B and N6741B - N6746B

Performance Specifications

N6731B/

N6741B

N6732B/

N6742B

N6733B/

N6743B

N6734B/

N6744B

N6735B/

N6745B

N6736B/

N6746B

DC Output Ratings:

Voltage 5 V 8 V 20 V 35 V 60 V 100 V

NOTE 1

Current

Power 50 W / 100 W 50 W / 100 W 50 W / 100 W 52.5W / 105W 50 W / 100 W 50 W / 100 W

10 A / 20 A

NOTE 2

6.25 A / 12.5 A 2.5 A / 5 A

1.5 A / 3 A

0.8 A / 1.6 A

0.5 A / 1 A

Output Ripple and Noise (PARD):

(from 20 Hz – 20 MHz)

CV peak-to- peak 10 mV / 11mV 12 mV 14 mV 15 mV 25 mV 30 mV

CV rms 2 mV 2 mV 3 mV 5 mV 9 mV 18 mV

Load Effect (Regulation): (with output change from no load to full load, up to a maximum load-lead drop of 1V/lead)

Voltage 5 mV 6 mV 9 mV 11 mV 13 mV / 16 mV 20 mV / 30 mV

Current 2 mA 2 mA 2 mA 2 mA 2 mA 2 mA

Source Effect (Regulation):

Voltage 1 mV 2 mV 2 mV 4 mV 6 mV 10 mV

Current

1 mA 1 mA 1 mA 1 mA 1 mA 1 mA

Programming Accuracy:

(@ 23 °C ±5 °C after 30 minute warm-up. Applies from minimum to maximum programming range)

Voltage 0.1% + 19 mV 0.1% + 19 mV 0.1% + 20 mV 0.1% + 35 mV 0.1% + 60 mV 0.1% +100 mV

Current

0.15% + 20 mA 0.15% + 20 mA 0.15% + 20 mA 0.15% + 20 mA 0.15% + 20 mA 0.15% + 10mA

Measurement Accuracy: (at 23 °C ±5 °C)

Voltage 0.1% + 20 mV 0.1% + 20 mV 0.1% + 20 mV 0.1% + 35 mV 0.1% + 60 mV 0.1% +100 mV

Current

0.15% + 20 mA 0.15% + 10 mA 0.15% + 5 mA 0.15% + 4 mA 0.15% + 4 mA 0.15% + 2 mA

Load Transient Recovery Time: (time to recover to within the settling band following a load change from 50% to 100% and from 100% to 50% of full load.)

Voltage settling band

Time < 200 µs < 200 µs < 200 µs < 200 µs < 200 µs < 200 µs

Output current is derated 1% per °C above 40°C.

When relay option 760 is installed on Model N6742B, the maximum output current will be limited to 10 A.

When relay option 760 or 761 is installed, the settling band is ±0.10V/0.125 V. Option 760 is not available on Model N6741B.

NOTE 3

±0.08 V / 0.1 V

NOTE 3

±0.08 V / 0.1 V

± 0.2 V / 0.3 V ± 0.2 V / 0.3 V ± 0.4 V / 0.5 V ± 0.5 V / 1.0 V

82 Series N6700 User’s Guide

Supplemental Characteristics

Specifications Appendix A

N6731B/

N6741B

N6732B/

N6742B

N6733B/

N6743B

N6734B/

N6744B

N6735B/

N6745B

N6736B/

N6746B

Programming Ranges:

Voltage

Current

15 mV – 5 .1 V 15 mV – 8 .16 V 30 mV – 20.4 V 40 mV – 35.7 V 70 mV – 61.2 V 100 mV – 102 V

60 mA – 10.2 A/

60 mA – 20.4 A

40 mA –6.375 A/

40 mA – 12.75 A

10 mA – 2.55 A/

10 mA – 5.1 A

5 mA – 1.53 A/

5 mA – 3.06 A

2.5mA – 0.85 A/

2.5m A – 1.7 A

1.5 mA – 0.51A/

1.5 mA – 1.02 A

Programming Resolution:

Voltage 3.5 mV 4 mV 7 mV 10 mV 18 mV 28 mV

Current 7 mA 4 mA 3 mA 2 mA 1 mA 0.5 mA

Measurement Resolution:

Voltage 3 mV 4 mV 10 mV 18 mV 30 mV 50 mV

Current 10 mA 7 mA 3 mA 2 mA 1 mA 0.5 mA

Temperature Coefficient per °C:

Voltage Programming

Current Programming

Voltage Measurement

Current Measurement

0.005% + 0.1 mV 0.005% + 0.1 mV 0.005% + 0.2 mV 0.005% + 0.5 mV 0.005% + 0.5 mV 0.005% + 1 mV

0.005% + 1 mA 0.005% + 0.5 mA 0.005% + 0.1 mA 0.005% + 0.05 mA 0.005% + 0.02 mA 0.005% + 0.02 mA

0.01% + 0.1mV 0.01% + 0.1 mV 0.01% + 0.2 mV 0.01% + 0.2 mV 0.01% + 0.5 mV 0.01% + 0.5 mV

0.01% + 1 mA 0.01% + 0.5 mA 0.01% + 0.1 mA 0.01% + 0.05 mA 0.01% + 0.02 mA 0.01% + 0.02 mA

Output Ripple and Noise (PARD):

CC rms 8 mA 4 mA 2 mA 2 mA 2 mA 2 mA

Common Mode Noise:

(from

20 Hz – 20 MHz; from either output to chassis)

Rms 1 mA 1 mA 1 mA 1 mA 1 mA 1 mA

Peak-to- peak < 15 mA < 10 mA < 10 mA < 10 mA < 10 mA < 10 mA

Over-voltage Protection:

Accuracy 0.25% + 50mV 0.25% + 50 mV 0.25% + 75 mV 0.25% + 100 mV 0.25% + 200 mV 0.25% + 250 mV

Accuracy w/opt 760 0.25%+600mV 0.25% + 600 mV 0.25% + 350 mV 0.25% + 250 mV 0.25% + 300 mV 0.25% + 300 mV

Accuracy w/opt 761 0.25%+600mV 0.25% + 600 mV 0.25% + 350 mV 0.25% + 250 mV 0.25% + 300 mV 0.25% + 300 mV

Maximum setting 7.5 V 10 V 22 V 38.5 V 66 V 110 V

Response time

50 µs from occurrence of over-voltage condition to start of output shutdown

Remote Sense Capability:

Outputs can maintain specifications with up to a 1-volt drop per load lead.

Series and Parallel Operation:

Identically rated outputs can be operated directly in parallel or can be connected for straight series operation. Auto-

series and auto-parallel operation is not available.

Maximum Up-programming and Down-programming Time with full resistive load:

(time f

rom 10% to 90% of total voltage excursion)

From 0 V to full scale and full scale to 0 V

20 ms 20 ms 20 ms 20 ms 20 ms 20 ms

Maximum Up-programming and Down-programming Settling Time with full resistive load:

(time from start of voltage change until voltage settles within 0.1% of the full-scale voltage of its final value)

From 0 V to full scale and full scale to 0 V

100 ms 100 ms 100 ms 100 ms 100 ms 100 ms

Series N6700 User’s Guide 83

Appendix A Specifications

Agilent Models N6773A - N6776A

Performance Specifications

N6773A N6774A N6775A N6776A

DC Output Ratings:

Voltage 20 V 35 V 60 V 100 V

NOTE 1

Current

15 A

Power 300 W 300W 300 W 300 W

Output Ripple and Noise (PARD):

(from 20 Hz – 20 MHz)

CV peak-to- peak 20 mV 22 mV 35 mV 45 mV

CV rms 3 mV 5 mV 9 mV 18 mV

Load Effect (Regulation): (with output change from no load to full load, up to a maximum load-lead drop of 1V/lead)

Voltage 13 mV 16 mV 24 mV 45 mV

Current 6 mA 6 mA 6 mA 6 mA

Source Effect (Regulation):

Voltage 2 mV 4 mV 6 mV 10 mV

Current

1 mA 1 mA 1 mA 1 mA

Programming Accuracy:

(@ 23 °C ±5 °C after 30 minute warm-up. Applies from minimum to maximum programming range)

Voltage 0.1% + 20 mV 0.1% + 35 mV 0.1% + 60 mV 0.1% +100 mV

Current

0.15% + 60 mA 0.15% + 60 mA 0.15% + 60 mA 0.15% + 30 mA

Measurement Accuracy: (at 23 °C ±5 °C)

Voltage 0.1% + 20 mV 0.1% + 35 mV 0.1% + 60 mV 0.1% +100 mV

Current

0.15% + 15 mA 0.15% + 12 mA 0.15% + 12 mA 0.15% + 6 mA

Load Transient Recovery Time: (time to recover to within the settling band following a load change from 50% to 100% and from 100% to 50% of full load.)

Voltage settling band ± 0.3 V

Time

Output current is derated 1% per °C above 40°C.

When relay Option 760 is installed, the maximum output current will be limited to 10 A.

When relay Option 760 or 761 is installed, the settling band is ±0.35 V.

< 250 µs < 250 µs < 250 µs < 250 µs

NOTE 2

8.5 A 5 A 3 A

NOTE 3

± 0.3 V

NOTE 3

± 0.5 V ± 1.0 V

84 Series N6700 User’s Guide

Specifications Appendix A

Supplemental Characteristics

N6773A N6774A N6775A N6776A

Programming Ranges:

Voltage

Current

Programming Resolution:

Voltage 7 mV 10 mV 18 mV 28 mV

Current 9 mA 6 mA 3 mA 1.5 mA

Measurement Resolution:

Voltage 10 mV 18 mV 30 mV 50 mV

Current 9 mA 6 mA 3 mA 1.5 mA

Temperature Coefficient per °C:

Voltage Programming

Current Programming

Voltage Measurement

Current Measurement

Output Ripple and Noise (PARD):

CC rms 6 mA 6 mA 6 mA 6 mA

Common Mode Noise:

(from

20 Hz – 20 MHz; from either output to chassis)

Rms 2 mA 2 mA 2 mA 2 mA

Peak-to- peak < 20 mA < 20 mA < 20 mA < 20 mA

Over-voltage Protection:

Accuracy 0.25% +100 mV 0.25% + 130 mV 0.25% + 260 mV 0.25% + 650 mV

Accuracy w/opt 760 0.25% + 700 mV 0.25% + 700 mV 0.25% + 400 mV 0.25% + 650 mV

Accuracy w/opt 761 0.25% + 500 mV 0.25% + 350 mV 0.25% + 350 mV 0.25% + 650 mV

Maximum setting 22 V 38.5 V 66 V 110 V

Response time

Remote Sense Capability:

Outputs can maintain specifications with up to a 1-volt drop per load lead.

Series and Parallel Operation:

Identically rated outputs can be operated directly in parallel or can be connected for straight series operation. Auto-

Maximum Up-programming and Down-programming Time with full resistive load:

(time f

rom 10% to 90% of total voltage excursion)

From 0 V to full scale and full scale to 0 V

Maximum Up-programming and Down-programming Settling Time with full resistive load:

(time from start of voltage change until voltage settles within 0.1% of the full-scale voltage of its final value)

From 0 V to full scale and full scale to 0 V

30 mV – 20.4 V 40 mV – 35.7 V 70 mV – 61.2 V 100 mV – 102 V

30 mA – 15.3 A 15 mA – 8.67 A 7.5 mA – 5.1 A 4.5 mA – 3.06 A

0.01% + 0.2 mV 0.01% + 0.5 mV 0.01% + 0.5 mV 0.01% + 1 mV

0.01% + 0.5 mA 0.01% + 0.5 mA 0.01% + 0.1 mA 0.01% + 0.1 mA

0.01% + 0.2 mV 0.01% + 0.2 mV 0.01% + 0.5 mV 0.01% + 0.5 mV

0.01% + 0.5 mA 0.01% + 0.5 mA 0.01% + 0.05 mA 0.01% + 0.05 mA

50 µs from occurrence of over-voltage condition to start of output shutdown

series and auto-parallel operation is not available.

20 ms 20 ms 20 ms 20 ms

100 ms 100 ms 100 ms 100 ms

Series N6700 User’s Guide 85

Appendix A Specifications

Agilent N6700B, N6701A, N6702A MPS Mainframes

Supplemental Characteristics

N6700B, N6701A, N6702A

Command Processing Time:

≤ 1 ms from receipt of command to start of output change

Protection Response Characteristics:

INH input

Fault on coupled outputs

Digital Control Characteristics:

Maximum voltage ratings

Pins 1 and 2 as FLT output

Pins 1 - 7 as digital/trigger outputs (pin 8 = common)

Pins 1 - 7 as digital/trigger inputs and pin 3 as INH input (pin 8 = common)

Interface Capabilities:

GPIB

LXI Compliance

USB 2.0

10/100 LAN

Built-in Web server

Regulatory Compliance:

EMC

Safety

5 µs from receipt of inhibit to start of shutdown

< 10 µs from receipt of fault to start of shutdown

+16.5 VDC/− 5 VDC between pins (pin 8 is internally connected to chassis ground).

Maximum low-level output voltage = 0.5 V @ 4 mA Maximum low-level sink current = 4 mA Typical high-level leakage current = 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

SCPI - 1993, IEEE 488.2 compliant interface

Class C (only applies to units with LXI label on front panel)

Requires Agilent IO Library version M.01.01 or 14.0 and up

Requires Agilent IO Library version L.01.01 or 14.0 and up

Requires Internet Explorer 5+ or Netscape 6.2+

Complies with EMC directive for Class A test and measurement products. Complies with Australian standard and carries C-Tick mark. This ISM device complies with Canadian ICES-001. Cet appareil ISM est conforme à la norme NMB-001 du Canada.

Electrostatic discharges greater than 1 kV near the I/O connectors may cause the unit to reset and require operator intervention.

Complies with European Low Voltage Directive and carries the CE-marking. Complies with US and Canadian safety standards for test and measurement products.

86 Series N6700 User’s Guide

Specifications Appendix A

Supplemental Characteristics (continued)

N6700B, N6701A, N6702A

Environmental Conditions

Operating environment

Temperature range

Relative humidity

Altitude

Storage temperature

LED statement

Acoustic Noise Declaration:

This statement is provided to comply with the requirements of the German Sound Emission Directive, from 18 January 1991.

Power Available to Modules:

Values represent combined

power rating of all modules installed per mainframe.

AC Input:

Nominal Input Ratings

Input Range

Power Consumption (units have power factor correction)

Fuse

Agilent N6702A Note: AC mains circuits rated at nominal 100-120 VAC cannot supply enough current to power the N6702A mainframe when 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.

Output Terminal Isolation:

Maximum Rating No power module output terminal may be more than 240

Dimensions:

Height

Width

Depth (including handles)

Net Weight:

N6700B with 4 power modules

N6701A with 4 power modules

N6702A with 4 power modules

Single power module (typical)

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

Any LEDs in this unit are Class 1 LEDs as per IEC 825-1

Sound Pressure Lp <70 dB(A), At Operator Position, Normal Operation, According to EN 27779 (Type Test). Schalldruckpegel Lp <70 dB(A), Am Arbeitsplatz, Normaler Betrieb, Nach EN 27779 (Typprüfung).

400 W (for N6700B mainframes) 600 W (for N6701A mainframes) 1200 W (for N6702A mainframes)

100 VAC – 240 VAC; 50/60/400Hz

86 VAC – 264 VAC

1000 VA (N6700B mainframes) 1500 VA (N6701A mainframes) 3000 VA (N6702A mainframes)

Internal fuse - not customer accessible.

VDC from any other terminal or chassis ground.

44.45 mm / 1.75 in.

432.5 mm / 17.03 in.

585.6 mm / 23.06 in. (N6700B/N6701A mainframes)

633.9 mm / 24.96 in. (N6702A mainframes)

12.73 kg / 28 lbs.

11.82 kg / 26 lbs.

14.09 kg / 31 lbs.

1.23 kg / 2.71 lbs

Series N6700 User’s Guide 87

Appendix A Specifications

Outline Diagram

432.5 mm

17.03"

482.6 mm

19.00"

549.7 mm

21.64"

N6700B/

N6701A

598.0 mm

23.54"

N6702A

560.2 mm

22.06"

N6700B/

N6701A

608.5 mm

23.96"

N6702A

25.4 mm

1.00"

44.45 mm

1.75"

425.45 mm

16.75"

= AIRFLOW

88 Series N6700 User’s Guide

Appendix B Using the Digital Port

Digital Control Port ........................................................................................... 90

Configuring the Digital Control Port...............................................................91

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

NOTE

 External Trigger

 Fault Output

 Inhibit Input

 Output State (see Appendix D)

Earlier Agilent 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 of the 4-pin connector.

Series N6700 User’s Guide 89

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.

TIGHTEN SCREWS

1 2 3 4 5 6 7

+ -

Output trigger

signal, or

Input trigger

signal

INSERT WIRES

Signal Common

The digital control connector accepts wires sizes from AWG 14 to AWG 30. Note that wire sizes smaller than AWG 24 are not recommended. Disconnect the connector plug to make your wire connections.

NOTE

It is good engineering practice to twist and shield all signal wires to and from the digital connectors. If shielded wire is used, connect only one end of the shield to chassis ground to prevent ground loops.

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

External Trigger In/Out

Fault Out

Inhibit In

Output State

Common (⊥)

Pins 1 through 7

Pins 1 and 2

Pin 3

Pins 4 through 7

Pin 8

In addition to the configurable pin functions, the active signal polarity for each pin is also configurable. When Positive polarity is selected, a logical true signal is a voltage high at the pin. When Negative polarity is selected, a logical true signal is a voltage low at the pin.

90 Series N6700 User’s Guide

Configuring the Digital Control Port

Bi-directional Digital I/O

Each of the seven pins can be configured as general purpose bidirectional 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 1 2 3 4 5 6 7 Bit 0 1 2 3 4 5 6

To configure the pins for digital I/O:

Front Panel: SCPI Command:

Select System\IO\DigPort\Pin<n>, where <n> is the pin number.

Select Function, then Digital I/O.

Go back one level, select Polarity, then either Positive or Negative.

To send digital data to the pins, select System\IO\DigPort\Data.

Select Data Out and enter the data as a binary number.

Using the Digital Port Appendix B

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 circuits. The following figure illustrates typical relay circuits as well as digital interface circuit connections using the digital I/O functions.

Ports 0, 1, 2

TTL, AS, CMOS, HC

1 2 3 4 5 6 7

Relay driver Ports 0, 1, 2. (contains internal clamp diodes for inductive flyback)

16.5 V Max.

Coil Current

0.1 A Max.

1 2 3 4 5 6 7

Digital Output

1 2 3 4 5 6 7

Digital Input

Ports 0, 1, 2

B) Digital Interface CircuitsA) Relay Circuits

For a complete description of the electrical characteristics of the digital I/O port, see Appendix A.

Series N6700 User’s Guide 91

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 digital output word.

To configure the pins for digital input only:

Front Panel: SCPI Command:

Select System\IO\DigPort\Pin<n>, where <n> is the pin number.

Select Function, then Digital In.

Go back one level, select Polarity, then either Positive or Negative.

To read the data from the pins, select System\IO\DigPort\Data.

The input data is displayed as a binary number in the Data In field.

To configure the pin function:

DIG:PIN<1-7>:FUNC DINP

To configure pin polarity: DIG:PIN<1-7>:POL <pol>

To read the pin data: DIG:INP:DATA?

External Trigger

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 negativegoing 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 positivegoing or negative-going when referenced to common.

Front Panel: SCPI Command:

Select System\IO\DigPort\Pin<n>, where <n> is the pin number.

Select Function, then either Trigger In or Trigger Out.

Go back one level, select Polarity, then either Positive or Negative.

To select the trigger output function for pin 1:

DIG:PIN1:FUNC TOUT

To select the trigger input function for pin 2:

DIG:PIN2:FUNC TINP

To select the trigger polarity: DIG:PIN<1-7>:POL <pol>

92 Series N6700 User’s Guide

Fault Output

Using the Digital Port Appendix B

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.

Front Panel: SCPI Command:

Select System\IO\DigPort\Pin1.

Select Function, then Fault Out.

Go back one level, select Polarity, then either Positive or Negative.

To configure the Fault function: DIG:PIN1:FUNC FAUL

To select the fault output polarity: DIG:PIN1:POL <pol>

Inhibit Input

LATChing Causes a logic-true transition on the Inhibit input to disable all outputs. The

LIVE Allows the enabled outputs to follow the state of the Inhibit input. When the

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-volatile memory:

outputs will remain disabled after the inhibit signal is received.

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\IO\DigPort\Pin3.

Select Function, then Inhibit In.

Go back one level, select Polarity, then either Positive or Negative.

Select Protect\Inhibit.

Select either Latching or Live.

To disable Inhibit, select Off

To configure the Inhibit function: DIG:PIN3:FUNC INH

To select the inhibit input polarity:

DIG:PIN3:POL <pol>

To latch the Inhibit signal: OUTP:INH:MODE LATC

To set the Inhibit signal live: OUTP:INH:MODE LIVE

To disable the Inhibit signal: OUTP:INH:MODE OFF

Series N6700 User’s Guide 93

Appendix B Using the Digital Port

Fault/Inhibit System Protection

The following figure illustrates some ways that you can connect the Fault/Inhibit pins of the connector.

INH

FLT

1 2 3 4 5 6 7

+ - + -

FLT

1 2 3 4 5 6 7

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:

INH

FLT

1 2 3 4 5 6 7

+ -

INH

Input

INH

Common

Panic

switch

NOTE

Output State

1. The initial protection fault or external Inhibit signal.

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.

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 Agilent N6700 mainframes together and synchronize the output on/off sequence across mainframes. Refer to Appendix D for detailed information.

94 Series N6700 User’s Guide

Appendix C Power Allocation

Power Limit Operation .....................................................................................96

Module Power Allocation................................................................................ 97

This chapter discusses the power allocation function.

For the majority of Agilent 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.

NOTE

The power rating of Agilent N6700 mainframes is as follows:

 Agilent N6700A/B = 400 W

 Agilent N6701A = 600 W

 Agilent 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.

The power allocation function is only available on power system mainframes with firmware revision C.00.00 and up. To upgrade your power system with the latest firmware revision, go to http://www.agilent.com/find/N6700firmware If this firmware is not installed, the later higher-power modules will not be recognized by the mainframe and a self-test error will result.

Series N6700 User’s Guide 95

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.

NOTE

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

When the power limit has been set to a value less than the maximum rating on a power module, and either the output voltage 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 Agilent N673xA, N674xA, 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.

On Agilent 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.

NOTE

96 Series N6700 User’s Guide

Power limiting should not be used when Agilent N673xB, N674xB, and N677xA power modules are grouped. When these power modules are grouped, you must reset the power limit to its maximum rated value.

Module Power Allocation

Power Allocation Appendix C

The following commands program the module power limit function:

Front Panel: SCPI Command:

Select Output\Power.

Enter a power limit for each output.

To query the power limits that are set, send:

Front Panel: SCPI Command:

Select Output\Power.

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

To set a power limit on output 1:

POW:LIM 100,(@1)

POW:LIM? (@1:4)

*RST or

POW:LIM MAX,(@1:4)

NOTE

When an output channel is set to MAX, it returns to its maximum rated value, and the power limit function will not activate.

Series N6700 User’s Guide 97

Appendix D Output On/Off Synchronization

Synchronizing Output Turn-on Delays.........................................................100

Synchronizing Multiple Mainframes............................................................103

Operation .......................................................................................................... 104

This chapter 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-programmed turn-on delays.

NOTE

This same reference point also makes it possible to connect multiple Agilent 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.

The output turn-on synchronization function is only available on Agilent N6700B, N6701A, and N6702A mainframes with firmware revision C.01.01 and up. To upgrade your power system with the latest firmware revision, go to

http://www.agilent.com/find/N6700firmware

Agilent N6700A mainframes with the 4-pin digital connector do not support this function.

Series N6700 User’s Guide 99

Appendix D Output On/Off Synchronization

Synchronizing Output Turn-on Delays

Tutorial

All N6700 Power Modules that are installed in an Agilent 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 in the following table.

Power Modules Options and Mode Minimum

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 Without relays 32 ms

With relay option 760 58 ms

Without relays; Current priority 23 ms

With relay option 760; Current priority 45 ms

Delay Offset

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)

N6751A (2)

N6751A w/relays (3)

N6761A (4)

58 10

= internal delay offset = programmed turn-on delay

20 30 40 50 60 70 80

milliseconds

To synchronize power modules with different minimum delay offsets as shown above, you can specify a common delay offset parameter.

100 Series N6700 User’s Guide

Agilent Technologies N6700 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Legal Notices

Safety Notices

In this Book

Contents

The Agilent N6700 Modular Power System – At a Glance

Output Features

System Features

Model Differences

The Front Panel - At a Glance

The Rear Panel – At a Glance

Front Panel Display – At a Glance

Front Panel Keys – At a Glance

Front Panel Menu Reference

SCPI Command Summary

Subsystem Commands

Common Commands

*RST Settings

General Information

Models

Items Supplied

Options

Inspecting the Unit

Installing the Unit

Safety Considerations

Environment

Rack Installation

Channel Number

400 Hz Operation

Cleaning

Connecting the Line Cord

Snap-On Ferrite Core

Connecting the Outputs

Multiple Loads

Response Time with an External Capacitor

Positive and Negative Voltages

Protecting Sensitive Loads from AC Power Switching Transients

Remote Sense Connections

Over-voltage Protection Considerations

Output Noise Considerations

Parallel Connections

Grouping the Outputs

Effect on Specifications

Series Connections

Setting the Outputs

Effect on Specifications

Turning the Unit On

Selecting an Output Channel

Entering an Output Voltage Setting

Method 1 – Use the Navigation and Arrow Keys

Method 2 - Use the Voltage key to enter a value

Entering a Current Limit Setting

Method 1 – Use the Navigation and Arrow Keys

Method 2 - Use the Current key to enter a value

Enabling the Output

Use the On/Off key to enable the output

Using the Front Panel Menu

Set the Over-Voltage Protection

Exiting the Command Menu

In Case of Trouble

Connecting to the Interfaces

GPIB Interface

LAN Interface

LAN Communication

Programming the Output

Select an Output Channel

Set the Output Voltage

Set the Voltage Slew Rate

Set the Output Current

Enable the Output

Sequence Multiple Outputs

Program the Output Relays

Synchronizing Output Steps

Enable the Output to Respond to Trigger Commands

Set the Voltage or Current Trigger Levels

Select the Transient Trigger Source

Initiate the Transient Trigger System