Agilent Technologies 664xA, 665xA, 667xA, 669xA, 668xA manual Stb?, Meaning and Type, Description

Page 31
*STB?

*SRE

Meaning and Type

Service Request Enable Device Interface

Description

This command sets the condition of the Service Request Enable Register. This register determines which bits from the Status Byte Register (see *STB for its bit configuration) are allowed to set the Master Status Summary (MSS) bit and the Request for Service (RQS) summary bit. A 1 in any Service Request Enable Register bit position enables the corresponding Status Byte Register bit and all such enabled bits then are logically ORed to cause Bit 6 of the Status Byte Register to be set. See "Chapter 4 - Status Reporting" for more details concerning this process.

When the controller conducts a serial poll in response to SRQ, the RQS bit is cleared, but the MSS bit is not. When *SRE is cleared (by programming it with 0), the power supply cannot generate an SRQ to the controller.

Command Syntax

*SRE <NRf>

Parameters

0-to255

 

Default Value

(See *PSC)

Example

*SRE 20

 

Query Syntax

*SRE?

 

Returned Parameters

<NR1>

(Register binary value)

Related Commands

*ESE

*ESR *PSC

If *PSC is programmed to 0, then the *SRE command causes a write cycle to nonvolatile memory. The nonvolatile memory has a finite number of write cycles (see Supplemental Characteristics in the power supply Operating Guide). Programs that repeatedly write to nonvolatile memory can eventually exceed the maximum number of write cycles and may cause the memory to fail.

*STB?

Meaning and Type

Status Byte Device Status

Description

This query reads the Status Byte register, which contains the status summary bits and the Output Queue MAV bit. Reading the Status Byte register does not clear it. The input summary bits are cleared when the appropriate event registers are read (see "Chapter 4 - Status Reporting" for more information). The MAV bit is cleared at power on or by *CLS.

A serial poll also returns the value of the Status Byte register, except that bit 6 returns. Request for Service (RQS) instead of Master Status Summary (MSS). A serial poll clears RQS, but not MSS. When MSS is set, it indicates that the power supply has one or more reasons for requesting service.

Bit Configuration of Status Byte Register

Bit Position

7

6

 

5

 

4

3

2

 

1

0

Condition

OPER

MSS (RQS)1

 

ESB

 

MAV

QUES

2

 

2

2

Bit Weight

128

64

 

32

 

16

8

4

 

2

1

ESB = Event status byte summary; MAV = Message available; MSS = Master status summary;

 

 

OPER = Operation status summary; QUES = Questionable status summary; RQS = Request for service.

 

1Also represents RQS. 2These bits are always zero.

 

 

 

 

 

 

 

 

 

 

Query Syntax

*STB?

 

 

 

 

 

 

 

Returned Parameters

<NR1>

(Register binary value)

 

 

 

Related Commands

(None)

 

 

 

 

 

 

32 Language Dictionary

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Contents July PROGRAMMING GUIDE GPIB DC POWER SUPPLIESAgilent Part No Microfiche Part NoPrinting History Safety GuidelinesLANGUAGE DICTIONARY ContentsGENERAL INFORMATION REMOTE PROGRAMMINGDescription of Subsystem Commands COMPATIBILITY LANGUAGE ERROR MESSAGESSTATUS REPORTING SCPI CONFORMANCE INFORMATIONUser’s Guide General InformationAbout this Guide Documentation SummaryAccessing Online Help Prerequisites for Using this GuideVXIplug&play Power Product Instrument Drivers Downloading and Installing the DriverConventions GPIB Capabilities Of The Power SupplyRemote Programming Introduction To SCPICommon Commands Types of SCPI CommandsSCPI Messages Structure of a SCPI MessageVOLT LEV PROT CURR Parts of a SCPI MessageFigure 2-1.Command Message Structure Message ComponentRoot Specifier Traversing the Command TreeQuery Indicator Message Unit SeparatorMoving Among Subsystems Figure 2-2.Partial Command TreeActive Header Path The Effect of Optional HeadersSCPI Data Formats Including Common CommandsSCPI Queries Value CouplingClass ExamplesListening Formats Table 2-2.Suffixes and MultipliersProgramming Voltage and Current Controlling the OutputDisable the output Enable the outputWriting to the Display Saving and Recalling StatesProgramming Status Programming the Digital I/O Port System ConsiderationsThe GPIB Address A direct primary address and a secondary address Error Handling DOS DriversAgilent BASIC Controllers Sample Program CodeController Using Agilent 82335A Interface Programming Some Power Supply Functions22 Remote Programming Programming Some Power Supply Functions continued1130 24 Remote Programming Language Dictionary Related CommandsCommon Commands Subsystem CommandsFigure 3-1.Common Commands Syntax Diagram Description Of Common CommandsDescription Meaning and Type0 to Query Syntax ESR?IDN? Related CommandsPSC 0 *PSC OPC?OPT? Power-onStatus Clear Device InitializationDescription Meaning and TypeDescription Bit Configuration of Status Byte Register STB?TST? Figure 3-2.Subsystem Commands Tree Diagram Description of Subsystem CommandsCalibration Commands ABORCURRENT:LEVEL 200 MA Current SubsystemCURR CURR TRIG CURR PROT STATDigital I/O Port Programming Chart Display SubsystemDIG DATA DISPenclosed in either single ‘ or double quotes DISP MODEDISP TEXT DISP TEXT DEFAULT MODEMEAS CURR? MEAS VOLT? Initiate SubsystemMeasure Subsystem INIT INIT:CONT0 or Output SubsystemOUTP OUTP PROT CLE OUTP PROT DELOUTP REL POL NORM OUTP RELOUTP REL POL OUTP REL 1 OUTP REL OFFSTAT OPER? Status SubsystemSTAT PRES Status Operation RegistersSTAT OPER NTR STAT OPER PTR STAT OPER ENABSTATUS OPERATION ENABLE? STAT QUES ENAB Status Questionable RegistersSTAT QUES? STAT:QUES:COND?corresponding Questionable Event register System CommandsSTAT QUES NTR STAT QUES PTR SYST ERR?TRIG Trigger SubsystemSYST LANG SYST VERS?VOLTAGE LEVEL 200 MV Voltage SubsystemTRIG SOUR VOLT VOLT TRIGCommand Command SummaryVOLT:PROT Command SummaryCommand Parameters Agilent Model and Value Characteristics in the Operating GuideProgramming Parameters ParameterOperation Status Group Power Supply Status StructureRegister Commands Status ReportingMeaning Table 4-2.Bit Configurations of Status RegistersSignal Figure 4-1.Power Supply Status ModelCLS *ESR? Questionable Status GroupStandard Event Status Group Table 4-3.Status Questionable CommandsStatus Byte Register Service Request Enable RegisterInitial Conditions At Power On Determining the Cause of a Service InterruptCaused By The PON Power-OnBitServicing an Operation Status Mode Event Table 4-4.Default Power On Register StatesTable 4-5.Generating RQS from the CC Event Monitoring Both Phases of a Status TransitionAdding More Operation Events Servicing Questionable Status EventsTechniques in ANSI/IEEE Std SCPI Command CompletionDFI Discrete Fault Indicator RI Remote InhibitSystem Error Messages Error MessagesPower Supply Hardware Error Messages Calibration Error Messages60 Error Messages SCPI Version SCPI Confirmed Commands1SCPI Approved Commands SCPI Conformance InformationNON-SCPICommands1 Compatibility Language ARPS Command1 Table B-1.ARPS CommandsSimilar SCPI Table B-1.ARPS Commands continued Description Index 68 Index Page Canada Agilent Sales and Support OfficeUnited States Latin America
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668xA, 669xA, 667xA, 664xA, 665xA specifications

Agilent Technologies has long been a pioneer in the production of high-performance electronic test and measurement instruments, particularly in the field of power sources. Among its notable offerings are the Agilent 667xA, 669xA, 665xA, 664xA, and 668xA series of power supplies. These instruments are designed to provide stable, reliable power for a variety of applications, including electronic testing, industrial processes, and research laboratories.

The Agilent 667xA series is characterized by its programmability and advanced measurement functions. These power supplies support a wide range of output voltages and currents, allowing for flexible configurations that cater to different testing needs. The built-in measurement capabilities enable users to monitor the voltage, current, and power with high precision, which is essential for ensuring optimal performance in electronic applications.

The Agilent 669xA series stands out with its high-power outputs, making it suitable for demanding applications. These power supplies deliver high voltage and current levels, making them ideal for testing high-performance devices, such as power amplifiers and motor drives. Additionally, the 669xA series includes features such as overvoltage protection and complex output sequencing to enhance the safety and reliability of the testing process.

The Agilent 665xA and 664xA series focus on delivering high accuracy and excellent regulation. These models are particularly known for their low noise operation, which is critical for sensitive applications where precision is paramount. The integrated programming capabilities allow users to automate testing sequences, thus improving efficiency in research and development settings.

The 668xA series features advanced digital signal processing that enhances the precision and stability of the output. Users benefit from features like remote sensing and monitoring, allowing feedback adjustments that maintain output accuracy despite cable losses. Furthermore, the 668xA models can integrate seamlessly with various test environments thanks to their LAN, GPIB, and USB connectivity options.

Overall, the Agilent 667xA, 669xA, 665xA, 664xA, and 668xA power supplies provide a comprehensive range of solutions for diverse electronic testing needs. With their advanced features, superb measurement capabilities, and robust performance, these instruments empower engineers and researchers to conduct their work with confidence, precision, and efficiency.
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