Keysight (Agilent) N6700B User’s Guide

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Agilent Technologies Modular Power System

Series N6700

User’s Guide

A A

Legal Notices

No part of this document may be photocopied, reproduced, or translated to another language without the prior agreement and written consent of Agilent Technologies, Inc. as governed by United States and international copyright laws.

Warranty

The material contained in this document is provided “as is,” and is subject to being changed, without notice, in future editions. Further, to the maximum extent permitted by applicable law, Agilent disclaims all warranties, either express or implied, with regard to this manual and any information contained herein, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Agilent shall not be liable for errors or for incidental or consequential damages in connection with the furnishing, use, or performance of this document or of any information contained herein. Should Agilent and the user have a separate written agreement with warranty terms covering the material in this document that conflict with these terms, the warranty terms in the separate agreement shall control.

Manual Editions

Manual Part Number: 5969-2908 Fifth Edition, January, 2005 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.

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.

Exclusive Remedies

THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER'S SOLE AND EXCLUSIVE REMEDIES. AGILENT TECHNOLOGIES SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.

Assistance

This product comes with the standard product warranty. Warranty options, extended support contacts, product maintenance agreements and customer assistance agreements are also available. Contact your nearest Agilent Technologies Sales and Service office for further information on Agilent Technologies' full line of Support Programs.

Technologies Licenses

The hardware and or software described in this document are furnished under a license and may be used or copied only in accordance with the terms of such license.

U.S. Government Restricted Rights

Software and technical data rights granted to the federal government include only those rights customarily provided to end user customers. Agilent provides this customary commercial license in Software and technical data pursuant to FAR 12.211 (Technical Data) and 12.212 (Computer Software) and, for the Department of Defense, DFARS 252.2277015 (Technical Data – Commercial Items) and DFARS 227.7202-3 (Rights in Commercial Computer Software or Computer Software Documentation).

Trademarks

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

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.

 Introduction to Programming – Chapter 5 gives a brief overview

of the SCPI command structure and basic programming concepts.

 Language Dictionary – Chapter 6 describes all of the SCPI

programming commands.

NOTE

 Programming Examples – Chapter 7 provides Visual Basic

example programs that illustrate some common applications.

 Specifications – Appendix A describes specifications and

supplemental characteristics.

 Verification and Calibration Procedures – Appendix B explains

the verification and calibration procedures.

 Using the Digital Port – Appendix C describes how to configure

and use the digital port on the back of the instrument.

 Service – Appendix D describes what to do if service is required.

 Compatibility – Appendix E documents the compatibility

commands of the Agilent Series 662xA DC power supplies that are supported by the Agilent N6700 Modular Power System.

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

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

2 Installation

General Information.......................................................................................... 16

Inspecting the Unit ........................................................................................... 17

Installing the Unit..............................................................................................17

Connecting the Line Cord ................................................................................ 19

Connecting the Outputs................................................................................... 20

Remote Sense Connections............................................................................ 24

Parallel Connections.........................................................................................25

Series Connections........................................................................................... 26

3 Getting Started

Turning the Unit On .......................................................................................... 30

Selecting an Output Channel.......................................................................... 30

Entering an Output Voltage Setting............................................................... 30

Entering a Current Limit Setting..................................................................... 31

Enabling the Output.......................................................................................... 31

Using the Front Panel Menu........................................................................... 32

Connecting to the Interfaces ..........................................................................34

4 Operating the Power System

Programming the Output .................................................................................46

Synchronizing Output Steps............................................................................ 49

Making Measurements.................................................................................... 52

System Related Operations.............................................................................53

Programming High-Speed Test Extensions.................................................. 57

5 Introduction to Programming

SCPI Commands................................................................................................ 68

SCPI Messages..................................................................................................70

SCPI Conventions and Data Formats.............................................................72

SCPI Command Completion ............................................................................74

Series N6700 User’s Guide 5

6 Language Dictionary

SCPI Command Summary................................................................................ 76

Calibration Subsystem......................................................................................80

Display Subsystem............................................................................................ 82

Measurement Subsystem................................................................................83

Output Subsystem.............................................................................................86

Source Subsystem ............................................................................................89

Status Subsystem .............................................................................................96

System Commands ......................................................................................... 103

Trigger Subsystem.......................................................................................... 107

7 Programming Examples

Output Programming Example...................................................................... 110

List Programming Example............................................................................112

Digitizer Programming Example....................................................................114

Appendix A Specifications

Performance Specifications.......................................................................... 118

Supplemental Characteristics....................................................................... 121

Autoranging Characteristic............................................................................128

Outline Diagram...............................................................................................128

Appendix B Verification and Calibration

Verification.......................................................................................................130

Calibration ........................................................................................................151

Appendix C Using the Digital Port

Digital Control Port .........................................................................................162

Configuring the Digital Control Port.............................................................166

Appendix D Service

Returning an Instrument................................................................................170

Disassembly.....................................................................................................171

Troubleshooting ..............................................................................................176

Parts List and Parts Location........................................................................ 183

Error Messages ...............................................................................................186

Appendix E Compatibility

Differences – In General................................................................................ 192

Compatibility Command Summary............................................................... 193

Differences in Earlier Agilent N6700A Mainframes..................................197

Index ...........................................................................................................................................................201

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

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.

A quick reference programming command chart is included in the beginning of chapter 6.

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

Series N6700 User’s Guide 7

1 Quick Reference

The Agilent N6700 Modular Power System – At a Glance

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

Up to four power modules can be installed in each Agilent N6700A/B MPS mainframe. Power modules come in power levels of 50 and 100 Watts, have various voltage and current combinations, and provide the following output performance levels:

 The N675xA High-Performance, Autoranging DC Power Modules

provide low noise, high accuracy, fast programming times, and advanced programming and measurement capabilities to speed test throughput.

 The N676xA Precision DC Power Modules provide precise control

and measurements in the milli- and micro-ampere region with the ability to simultaneously digitize voltage and current and capture those measurements into an oscilloscope-like data buffer.

 The N673xA/B and N674xA/B 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.

Output Features

Programmable voltage and current

Fast command processing

Fast up/down programming

Fast transient response

Low output noise

Autoranging capability

Full programming capability is provided for the entire range of output voltage and current. O

sources.

Command processing time of less than 1 millisecond per command.

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

Transient response is less than 100 microseconds for autoranging and precision power modules. Refer to Appendix A for details.

Output noise is typically 4 mV peak-to-peak for autoranging and precision power modules, which is comparable to linear supplies. Refer to Appendix A for details.

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.

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.

utputs can operate as either constant voltage (CV) or constant current (CC)

Output On/Off sequencing

8 Series N6700 User’s Guide

A turn-on/turn-off delay capability for each output allows output on/off sequencing.

Quick Reference 1

Remote voltage sensing

Two remote sensing terminals are provided for each output. When shipped from the factory, the remote sense jumpers are included in a separate bag. Refer to Chapter 2 for details.

Voltage

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

and current measurements

Voltage, current, and temperature protection

Each output has over-voltage, over-current, and over-temperature protection. Overvoltage 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

Front panel I/O setup

GPIB (IEEE-488), LAN, and USB (mini B) remote programming interfaces are built in.

Menus let you set up GPIB and LAN parameters from the front panel. Refer to Chapter 3 for details.

Built-in Web server

Real-time status information

Module identification

A built-in Web server lets you control the instrument directly from an internet browser on your computer. Refer to Chapter 3 for details.

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

Each module has identifying data stored in non-volatile memory. Information includes model number, serial number, and options. This information can be displayed on the front panel.

Model Differences

Feature DC Power Modules (A+B) Autoranging Modules Precision Modules

N6731 -

N6736

Output power rating 50 W1 100 W2 50 W 100 W 50 W 100 W

Autoranging output capability NO NO YES YES YES YES

Precision output and measurement capability NO NO NO NO YES YES

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

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

Simultaneous voltage and current measurement NO NO NO NO YES YES

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

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

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

Model N6735A has a maximum output of 40 W.

Models N6742A and N6745A have a maximum output of 80 W.

N6741 N6746

N6751A N6752A N6761A N6762A

Series N6700 User’s Guide 9

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 meter mode and the command menus. Exit a menu and return to meter mode. Select an output channel to display.

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. (N6700A mainframes use a 4-pin connector.)

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

Single-channel View Voltage measurement Current measurement

Press the Meter key to toggle between views

Operating mode (CV =

constant voltage mode)

Multiple-channel View Voltage and Current measurements

Press the Meter key to toggle between views

Voltage and Current settings

Quick Reference 1

Remote interface status (ALL, SRQ, ERR, IO)

The highlighted channel is the active channel

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

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

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

Grouped channels are addressed using the channel number of the

lowest channel in the group

Series N6700 User’s Guide 11

1 Quick Reference

Front Panel Keys – At a Glance

System Keys

Meter returns the display to metering mode.

Back

Sel

On/Off

Voltage

Current

Menu accesses the command menu. Channel selects or highlights a channel to control. Back backs out of a menu without activating any changes. Help accesses information about the displayed menu control. Error displays any error messages in the error queue.

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.

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.

Meter

Channel

Help Error

Navigation Keys

Output Keys

Number Keys

987

The number keys let you enter digits from 0 to 9 and a decimal point. The minus sign is selected by the +/− key. The exponent must be added to the right of the E symbol. The backspace key deletes digits as it backspaces over them. © ª arrow keys increment or decrement the value in certain 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 appear grayed-out on the display are either not available for the power module that is being programmed, or are password protected. Refer to appendix E for information about the front panel menu commands for firmware revisions prior to 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.

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.

System I/O LAN ActiveSettings Displays the LAN interface settings that are presently active.

Config IP Enables/disables DHCP and Auto IP. Also sets LAN addresses.

Name Configures the Dynamic DNS and NetBIOS naming service.

Domain Configures the Domain Name.

DNS Configures the DNS server.

TCP Configures the TCP keepalive function.

Reset Resets the LAN interface settings to the factory-shipped state.

USB Status USB connect string - the instrument’s unique USB identifier.

Identification Displays status, speed, packets received, and packets sent.

Series N6700 User’s Guide 13

1 Quick Reference

Menu Command Control Description

System I/O GPIB Selects the GPIB address.

DigPort Pin 1 Function Specifies the pin function: DigIO, TrigIn, TrigOut, DigIn, FaultOut.