Agilent Technologies N3280A Uživatelský manuál

USER’S GUIDEAgilent TechnologiesModel N3280AComponent Test DC Source5Agilent Part No. 5964-8248Microfiche No. 5964-8249June, 2001

10STATus:OPERation:NTR STATus:OPERation:PTR 70STATus:PRESet 70STATus:QUEStionable[:EVENt]? 70STATus:QUEStionable:CONDition? 71STATus:QUEStionable:ENAB

B - Performance and Calibration Procedures100Negative Current Limit CalibrationAction Program Commands1. Jumper the High sense terminal to the High ou

Performance and Calibration Procedures10115mA Range Current Measurement CalibrationAction Program Commands1. Jumper the High sense terminal to the Hig

B - Performance and Calibration Procedures102Changing the Calibration PasswordThe factory default password is 0. You can change the password when the

103CError MessagesError Number ListThis appendix gives the error numbers and descriptions that are returned by the dc source. Errors areindicated in

C – Error Messages104Table C-1. Error Numbers (continued–131 Invalid suffix [unrecognized units, or units not appropriate]–138 Suffix not allowed –141

Error Messages - C105Table C-1. Error Numbers (continuedSelftest Errors 0 through 99 (sets Standard Event Status Register bit #3)0 No error1 Ou

107DLine Voltage SelectionTo change the line voltage selection:1. Remove the line cord.2. Check if the line voltage displayed in the window must be ch

109EEarlier Version Output ConnectorsThis appendix documents the earlier version output connectors used on Agilent N3280A units.Earlier style Agilent

11Current Priority, Constant Current Source Effect 93Ripple and Noise Tests 94Voltage Priority Ripple and Noise 94Current Priority Ripple and Noise 95

111Index—A—AARD, 36ABORT, 73accessories, 14address switch, 21airflow, 20averaging measurements, 43AWG ratings, 23—C—cables, 14calibration, 99equipment

Index112IEEE Std for standard codes, 31IEEE Std for standard digital interface, 31interface, 25references, 31trigger, 43, 47GPIB connector, 21ground,

Index113equipment, 83setup, 85performance test form, 97post-event triggering, 48power cord, 19, 21power line cycles, 44power-on initialization, 39pre-

Index114—V—voltage, 39protection, 40voltage priority, 15voltage programming, 86—W—waiting for measurement results, 48warranty, 2wirecurrent ratings, 2

Agilent Sales and Support OfficeFor more information about Agilent Technologies test and measurement products, applications, services,and for a curre

Manual UpdatesThe following updates have been made to this manual since its publication.6/1/01Chapter 2 has been updated with information about the ne

131General InformationDocument OrientationThis manual describes the operation of the Agilent Model N3280A Component Test DC Source. Unlessotherwise no

1 - General Information14Options and AccessoriesTable 1-1. OptionsOption Description10087−106 Vac, 47−63 Hz220191−233 Vac, 47−63 Hz230207−253 Vac, 47−

General Information - 115Output CharacteristicsVoltage Priority OperationEach Agilent N3280A output is a four-quadrant bipolar dc source that can be o

1 - General Information16If the output voltage exceeds either the positive or negative overvoltage set point, the output will shutdown and be disabled

General Information - 117The heavy line illustrates the locus of possible operating points as a function of the output load, whichmay be purely resist

1 - General Information18measurement ranges to make fast measurements. The Hanning window can be used to reduce errorscaused by other periodic noise s

192InstallationInspectionDamageWhen you receive your dc source, inspect it for any obvious damage that may have occurred duringshipment. If there is d

2Warranty InformationCERTIFICATIONAgilent Technologies certifies that this product met its published specifications at time of shipment from the facto

2 - Installation20LocationFigure 2-1 gives the dimensions of your dc source. The dc source must be installed in a location thatallows enough space at

Installation - 221Power ConnectionsConnect the Power CordConnect the power cord to the IEC 320 connector on the rear of the unit. If the wrong powe

2 - Installation22Output ConnectionsTurn the unit off before connecting any wires.Outputs 1 - 4Disconnect the mating plug from the unit by pulling it

Installation - 223+_TWIST LEADSKEEP RESISTNCE ANDINDUCTANCE LOW.USE TWISTED PAIR ORSANDWICHED PCB TRACKS.TWIST PAIRFIXTURECONNECTIONSLOADADDITION OF

2 - Installation24NOTE: Any voltage drop in the load leads must be subtracted from the full-scale voltageavailable at the output terminals.Coaxial Gua

Installation - 225Maintaining StabilityIn voltage priority mode, the constant voltage loop has the following three compensation bandwidths:♦ 30 kHz,

2 - Installation26GPIB AddressEach dc source has its own GPIB bus address, which can be set using the rear panel Address switch. Thedc source is shipp

273Turn-On CheckoutFront Panel Description1 2 3N3280A 10V, 0.5AComponent Test DC SourceFigure 3-1. Front Panel, Overall ViewQQQQ Line SwitchA

3 – Turn-On Checkout28Checkout ProcedureSuccessful tests in this chapter provide a high degree of confidence that your unit is operating properly.Comp

Turn-On Checkout - 329In Case of TroubleDc source failure may occur during power-on selftest or during operation. Either the Error or the Protindicato

3Safety SummaryThe following general safety precautions must be observed during all phases of operation of this instrument.Failure to comply with thes

314Introduction to ProgrammingExternal ReferencesGPIB ReferencesThe most important GPIB documents are your controller programming manuals - BASIC, GPI

4 - Introduction to Programming32 Introduction to SCPI SCPI (Standard Commands for Programmable Instruments) is a programming language for controlling

Introduction to Programming - 433 Multiple Commands in a Message Multiple SCPI commands can be combined and sent as a single message with one message

4 - Introduction to Programming34 Types of SCPI Messages There are two types of SCPI messages, program and response.♦ A program message consists of o

Introduction to Programming - 435 Headers Headers, also referred to as keywords, are instructions recognized by the dc source. Headers may beeither in

4 - Introduction to Programming36 Suffixes and Multipliers Class Suffix Unit Unit with Multiplier Current A ampere MA (milliampere) Amplitude V

Introduction to Programming - 437 *OPC This sets the OPC status bit when all pending operations have completed. Since yourprogram can read this status

39 5 Programming the DC Source Introduction This chapter contains examples on how to program your dc source. Simple examples show you how toprogram:

4SAFETY SYMBOLSDirect currentAlternating currentBoth direct and alternating currentThree-phase alternating currentEarth (ground) terminalProtective ea

5 - Programming the DC Source40 Overvoltage Protection The dc source will turn off its output and open the output relays if the output voltage exceed

Programming the DC Source - 541 Oscillation Protection Oscillation protection is a built in function that shuts down the output in about 10 milliseco

5 - Programming the DC Source42 Setting the Voltage and Current Trigger Levels You can program a trigger level (or alternate value) that the output v

Programming the DC Source - 543 Generating Output Triggers After you have specified the appropriate trigger source, you can generate triggers as foll

5 - Programming the DC Source44 Power Line Cycles After a power-on or *RST, the dc source automatically makes measurements based on a 0.00912 powerli

Programming the DC Source - 545 Current Ranges The dc source has three current measurement ranges. The command that controls the ranges is: SENS:CURR

5 - Programming the DC Source46 Measurement Trigger Model Figure 5-3 is a model of the measurement trigger system. The rectangular boxes represent st

Programming the DC Source - 547 To select GPIB bus triggers, use: TRIG:ACQ:SOUR BUS To select external triggers use: TRIG:ACQ:SOUR EXT Selecting the

5 - Programming the DC Source48 When the acquisition finishes, any of the FETCh queries can be used to return the results. Once themeasurement trigge

Programming the DC Source - 549 Programming the Status Registers Status register programming lets you determine the operating condition of the dc sou

5Declaration PageDECLARATION OF CONFORMITYAccording to ISO/IEC Guide 22 and CEN/CENELEC EN 45014 Responsible Party Alternate Manufacturing SiteManufac

5 - Programming the DC Source50 Table 5-1. Bit Configurations of Status Registers Bit Signal Meaning 0 1 2 3 4 5 6 CV CL+ CL- CC VL+ VL- OFF Ope

Programming the DC Source - 551 Questionable Status Group The Questionable Status registers record signals that indicate abnormal operation. As shown

5 - Programming the DC Source52 Determining the Cause of a Service Interrupt You can determine the reason for an SRQ by the following actions: Step 1

53 6 Language Dictionary Introduction This section gives the syntax and parameters for all the IEEE 488.2 SCPI commands and the Commoncommands used

6 – Language Dictionary54SCPI Programming Commands - At a GlanceTable 6-1. Subsystem Commands SyntaxABORtResets the trigger system to the Idle stateC

Language Dictionary - 655Table 6-1. Subsystem Commands Syntax (continued)[SOURce:] CURRent [:LEVel] [:IMMediate][:AMPLitud

6 – Language Dictionary56Table 6-2. Common Commands Syntax*CLSClear status*ESE <n>Standard event status enable*ESE?Return standard event status

Language Dictionary - 657 Calibration Commands Calibration commands let you enable and disable the calibration mode, change the calibration password,

6 – Language Dictionary58 CALibrate:DATA This command enters a calibration value that you obtain by reading an external meter. You must firstselect a

Language Dictionary - 659 CALibrate:SAVE This command saves any new calibration constants after a calibration procedure has been completed innonvolat

6Acoustic Noise InformationHerstellerbescheinigungDiese Information steht im Zusammenhang mit den Anforderungen derMaschinenläminformationsverordnung

6 – Language Dictionary60 Measurement Commands Measurement commands consist of fetch, measure, and sense commands. Measure commands measure the outpu

Language Dictionary - 661MEASure:ARRay:CURRent?MEASure:ARRay:VOLTage?These queries initiate and trigger a measurement and return an array containing

6 – Language Dictionary62SENSe:FUNCtionThis command configures the sensing function for triggered measurements. The dc source has twomeasurement sens

Language Dictionary - 663SENSe:SWEep:POINtsThis command defines the number of points in a measurement.Command SyntaxSENSe:SWEep:POINts <NRf+>Pa

6 – Language Dictionary64Output CommandsOutput commands consist of output and source commands.Output commands enable the output and oscillation funct

Language Dictionary - 665[SOURce:]CURRent[:IMMediate][SOURce:]CURRent:TRIGgeredThese commands set the immediate and the pending triggered current lev

6 – Language Dictionary66[SOURce:]CURRent:MODE[SOURce:]CURRent:LIMit:MODEThese commands determine what happens to the output current and current limi

Language Dictionary - 667[SOURce:]FUNCtion:MODEThis comand configures the output operating mode. Note that if the output is on, changing the outputmo

6 – Language Dictionary68[SOURce:]VOLTage:MODEThis command determines what happens to the output voltage during a triggered event.FIXedThe output vol

Language Dictionary - 669Status CommandsStatus commands program the dc source status registers. The dc source has three groups of statusregisters; Op

7Table of ContentsWarranty Information 2Safety Summary 3Declaration Page 5Acoustic Noise Information 6Printing History 6Table of Contents 7GENERAL INF

6 – Language Dictionary70STATus:OPERation:NTRSTATus:OPERation:PTRThese commands set or read the value of the Operation NTR (Negative-Transition) and

Language Dictionary - 671STATus:QUEStionable:CONDition?This query returns the value of the Questionable Condition register. That is a read-only regis

6 – Language Dictionary72System CommandsSystem commands control system functions that are not directly related to output control or measurementfuncti

Language Dictionary - 673Trigger CommandsTrigger commands consist of trigger and initiate commands.Initiate commands initialize the trigger system.Tr

6 – Language Dictionary74TRIGger:ACQuire:SOURceThis command selects the trigger source for the measurement trigger system.EXTExternal trigger input s

Language Dictionary - 675Common Commands*CLSThis command causes the following actions (see chapter 5 for the descriptions of all registers):K Clears

6 – Language Dictionary76*IDN?This query requests the dc source to identify itself. It returns a string composed of four fields separatedby commas.Qu

Language Dictionary - 677*RSTThis command resets the dc source to a factory-defined state as defined in the following table. *RST alsoforces an ABORt

6 – Language Dictionary78Table 6-8. Bit Configuration of Status Byte RegisterBit Position 7 6 5 4 3 2 1 0Bit Name OPER MSS(RQS)ESB MAV QUES WTG 0 0Bi

79ASpecificationsIntroductionTable A-1 lists the specifications of the dc source. Unless otherwise noted, specifications are warrantedat 25°C ± 5°C af

8INTRODUCTION TO PROGRAMMING 31External References 31GPIB References 31SCPI References 31GPIB Capabilities of the DC Source 31Introduction to SCPI 32C

A - Specifications80Table A-2 lists the supplemental characteristics, which are not warranted but are descriptions of typicalperformance determined ei

Specifications - A81Table A-2 Supplemental Characteristics (continued)Parameter Voltage Priority Current PriorityProgramming OutputFall TimeVoltage11

A - Specifications8284210.50.250.12590450-45-90ooooo1k 10k 100k 1MFREQUENCY (Hz)VOLTAGE PRIORITY (bandwidth = 30kHz)OUTPUT IMPEDANCE (ohms)PhaseMagnit

83BPerformance Tests and CalibrationIntroductionThis appendix contains test procedures to verify that the dc source is operating normally and is withi

B - Performance and Calibration Procedures84Table B-1. Equipment Required (continued)Oscilloscope Sensitivity: 1 mV/div.Bandwidth Limit: 20 to 30 MHzP

Performance and Calibration Procedures85Electronic LoadMany of the test procedures require the use of a variable load capable of dissipating the requi

B - Performance and Calibration Procedures86Voltage Priority TestsVoltage Programming and Readback AccuracyThese tests verify that the voltage program

Performance and Calibration Procedures875. Set the ammeter to the 1A range, and record the output currentreading on the ammeter. The ammeter reading s

B - Performance and Calibration Procedures887.Turn on the output and program the 15mA current readback range.Measure the output current.“OUTP ON,(@1)”

Performance and Calibration Procedures89Load Effect TestsThe following tests verify the dc regulation of the output voltage and current. To insure tha

9Pre-trigger and Post-trigger Data Acquisition 48Programming the Status Registers 49Operation Status Group 50Questionable Status Group 51Standard Even

B - Performance and Calibration Procedures90Voltage Priority, +Current Limit Load EffectThis test measures the change in output current resulting from

Performance and Calibration Procedures91Current Priority Constant Current TestThis test measures the change in output current resulting from a change

B - Performance and Calibration Procedures924.Read back the N3280A status to be sure that it's in the CV mode. Thisquery should return a Bit valu

Performance and Calibration Procedures933.Read back the N3280A status to be sure that it’s in the –CL mode. Thisquery should return a Bit value of “4”

B - Performance and Calibration Procedures94Ripple and Noise TestsVoltage Priority Ripple and NoisePeriodic and random deviations (PARD) in the output

Performance and Calibration Procedures95Current Priority Ripple and NoisePeriodic and random deviations (PARD) in the output combine to produce a resi

B - Performance and Calibration Procedures96Figure B-2. Transient Waveform Voltage PriorityCurrent Priority Transient Recovery TimeThis test measures

Performance and Calibration Procedures97Figure B-3. Transient Waveform Current PriorityPerformance Test Equipment FormTest Facility:__________________

B - Performance and Calibration Procedures98Performance Test Record FormModel Agilent N3280A - Output 1 Report No ______________ Date _______________

Performance and Calibration Procedures99Performing the Calibration ProcedureYou can only calibrate the dc source by using SCPI commands within your co