GW Instek AFG-125, AFG-225, AFG-125P, AFG-225P User guide

Arbitrary Function Generator

AFG-125/AFG-225/AFG-125P/AFG-225P

USER MANUAL

GW INSTEK PART NO. 82AF-12500E01

ISO-9001 CERTIFIED MANUFACTURER

This manual contains proprietary information, which is protected by

photocopied, reproduced or translated to another language without

prior written consent of Good Will Corporation.

The information in this manual was correct at the time of printing.

However, Good Will continues to improve its products and therefore

reserves the right to change the specifications, equipment, and

maintenance procedures at any time without notice.

Good Will Instrument Co., Ltd.

No. 7-1, Jhongsing Rd., Tucheng Dist., New Taipei City 236, Taiwan.

Table of Contents

SAFETY INSTRUCTIONS.................................. 7

Safety Symbols .......................................................................7

Safety Guidelines.................................................................... 8

GETTING STARTED........................................ 11

Main Features ...................................................................11

Panel Overview..................................................................13

Front Panel ...........................................................................13

Rear Panel............................................................................. 14

System Requirements.........................................................15

Software Installation ............................................................15

Setup the Signal Generator..................................................16

Default Settings ................................................................17

REMOTE INTERFACE ..................................... 19

Establishing a Remote Connection ....................................19

Configure USB interface.......................................................19

Remote control terminal connection...................................20

Command Syntax .................................................................21

System Command .............................................................26

SYSTem:ERRor? ...................................................................26

*IDN? ...................................................................................26

*RST .....................................................................................27

SYSTem:VERSion?................................................................27

*OPC ....................................................................................27

*OPC?................................................................................... 28

*WAI ..................................................................................... 28

Status Register Commands ...............................................29

*CLS......................................................................................29

*ESE...................................................................................... 29

*ESR?....................................................................................30

*STB?.................................................................................... 30

*SRE .....................................................................................31

Apply Commands ..............................................................32

SOURce[1|2]:APPLy:SINusoid..............................................34

SOURce[1|2]:APPLy:SQUare ................................................ 34

SOURce[1|2]:APPLy:RAMP...................................................35

AFG-200 SERIES USER MANUAL

SOURce[1|2]:APPLy:PULSe.................................................. 35

SOURce[1|2]:APPLy:NOISe.................................................. 36

SOURce[1|2]:APPLy:USER ...................................................36

SOURce[1|2]:APPLy?............................................................ 37

Output Commands............................................................38

SOURce[1|2]:FUNCtion .......................................................38

SOURce[1|2]:FREQuency ..................................................... 39

SOURce[1|2]:AMPlitude....................................................... 41

SOURce[1|2]:DCOffset......................................................... 42

SOURce[1|2]:SQUare:DCYCle.............................................. 43

SOURce[1|2]:RAMP:SYMMetry............................................ 44

OUTPut[1|2] .........................................................................45

OUTPut[1|2]:LOAD .............................................................. 45

SOURce[1|2]:VOLTage:UNIT............................................... 46

Pulse Configuration Commands ........................................48

SOURce[1|2]:PULSe:PERiod ................................................48

SOURce[1|2]:PULSe:WIDTh................................................. 49

Amplitude Modulation (AM) Commands ...........................50

AM Overview........................................................................ 50

SOURce[1|2]:AM:STATe....................................................... 51

SOURce[1|2]:AM:INTernal:FUNCtion ................................. 51

SOURce[1|2]:AM:INTernal:FREQuency............................... 52

SOURce[1|2]:AM:DEPTh...................................................... 52

Frequency Modulation (FM) Commands............................54

FM Overview........................................................................ 54

SOURce[1|2]:FM:STATe....................................................... 55

SOURce[1|2]:FM:INTernal:FUNCtion .................................55

SOURce[1|2]:FM:INTernal:FREQuency............................... 56

SOURce[1|2]:FM:DEViation................................................. 56

Frequency-Shift Keying (FSK) Commands ..........................59

FSK Overview ....................................................................... 59

SOURce[1|2]:FSKey:STATe................................................... 59

SOURce[1|2]:FSKey:FREQuency .......................................... 60

SOURce[1|2]:FSKey:INTernal:RATE..................................... 61

Phase Modulation (PM)Commands ...................................62

PM Overview........................................................................ 62

SOURce[1|2]:PM:STATe....................................................... 63

SOURce[1|2]:PM:INTernal:FUNction.................................. 63

SOURce[1|2]:PM:INTernal:FREQuency............................... 64

SOURce[1|2]:PM:DEViation................................................. 64

SUM Modulation (SUM) Commands ..............................66

SUM Overview .....................................................................66

SOURce[1|2]:SUM:STATe .................................................... 67

Table of Contents

SOURce[1|2]:SUM:INTernal:FUNction................................67

SOURce[1|2]:SUM:INTernal:FREQuency.............................68

SOURce[1|2]:SUM:AMPL.....................................................68

Frequency Sweep Commands ............................................70

Sweep Overview ...................................................................70

SOURce[1|2]:SWEep:STATe ................................................. 71

SOURce[1|2]:FREQuency:STARt ..........................................72

SOURce[1|2]:FREQuency:STOP...........................................72

SOURce[1|2]:FREQuency:CENTer........................................73

SOURce[1|2]:FREQuency:SPAN........................................... 74

SOURce[1|2]:SWEep:SPACing..............................................75

SOURce[1|2]:SWEep:TIME................................................... 75

SOURce[1|2]:SWEep:SOURce.............................................. 76

SOURce[1|2]:MARKer:FREQuency....................................... 77

SOURce[1|2]:MARKer........................................................... 77

Burst Mode Commands.....................................................79

Burst Mode Overview...........................................................79

SOURce[1|2]:BURSt:STATe..................................................81

SOURce[1|2]:BURSt:MODE ................................................. 81

SOURce[1|2]:BURSt:NCYCles..............................................82

SOURce[1|2]:BURSt:INTernal:PERiod .................................83

SOURce[1|2]:BURSt:PHASe................................................. 83

SOURce[1|2]:BURSt:TRIGger:SOURce ................................ 84

SOURce[1|2]:BURSt:TRIGger:DELay....................................85

SOURce[1|2]:BURSt:TRIGger:SLOPe................................... 86

SOURce[1|2]:BURSt:GATE:POLarity .................................... 86

SOURce[1|2]:BURSt:OUTPut:TRIGger:SLOPe ....................87

SOURce[1|2]:BURSt:OUTPut[1|2]:TRIGger..........................88

Arbitrary Waveform Commands .........................................89

Arbitrary Waveform Overview..............................................89

SOURce[1|2]:FUNCtion USER .............................................90

SOURce[1|2]:DATA:DAC ...................................................... 90

SOURce[1|2]:ARB:EDIT:COPY .............................................91

SOURce[1|2]:ARB:EDIT:DELete ...........................................92

SOURce[1|2]:ARB:EDIT:DELete:ALL .................................... 92

SOURce[1|2]:ARB:EDIT:POINt.............................................92

SOURce[1|2]:ARB:EDIT:LINE............................................... 93

SOURce[1|2]:ARB:EDIT:PROTect.........................................93

SOURce[1|2]:ARB:EDIT:PROTect:ALL .................................94

SOURce[1|2]:ARB:EDIT:UNProtect......................................94

SOURce[1|2]:ARB:OUTPut...................................................94

Phase ................................................................................95

SOURce[1|2]:PHASe............................................................. 95

SOURce[1|2]:PHASe:SYNChronize......................................95

AFG-200 SERIES USER MANUAL

Couple...............................................................................96

SOURce[1|2]:FREQuency:COUPle:MODE .......................... 96

SOURce[1|2]:FREQuency:COUPle:OFFSet.......................... 96

SOURce[1|2]:FREQuency:COUPle:RATio ............................ 97

SOURce[1|2]:AMPlitude:COUPle:STATe ............................. 97

SOURce[1|2]:TRACk............................................................. 97

Sync ..................................................................................99

OUTPut:SYNC...................................................................... 99

OUTPut[1|2]:SYNC:MODE .................................................. 99

OUTPut[1|2]:SYNC:POLarity.............................................. 100

OUTPut:SYNC:SOURce..................................................... 101

Power Commands............................................................102

VOUTput............................................................................ 102

VSET ................................................................................... 102

Save and Recall Commands .............................................104

*SAV................................................................................... 104

*RCL ................................................................................... 104

MEMory:STATe:DELete .....................................................104

MEMory:STATe:DELete ALL .............................................. 105

Error Messages................................................................106

Command Error Codes...................................................... 106

Execution Errors................................................................. 108

Query Errors....................................................................... 115

Arbitrary Waveform Errors................................................. 115

SCPI Status Register........................................................117

AFG-200 SERIES Status System ........................................ 118

Questionable Status Register ............................................ 119

Standard Event Status Registers ....................................... 119

The Status Byte Register .................................................... 121

Output Queue.................................................................... 122

Error Queue........................................................................ 122

APPDENIX.................................................... 123

AFG-200 Specifications....................................................123

TABLE OF CONTENTS

SAFETY INSTRUCTIONS

This chapter contains important safety instructions that should be followed when operating and storing the function generator. Read the following before any operation to ensure your safety and to keep the function generator in the best condition.

Safety Symbols

These safety symbols may appear in this manual or on the instrument.

WARNING

CAUTION

Warning: Identifies conditions or practices that could result in injury or loss of life.

Caution: Identifies conditions or practices that could result in damage to the function generator or to other objects or property.

DANGER High Voltage

Attention: Refer to the Manual

Protective Conductor Terminal

Earth (Ground) Terminal

DANGER Hot Surface

AFG-200 SERIES USER MANUAL

Double Insulated

Do not dispose electronic equipment as unsorted municipal waste. Please use a separate collection facility or contact the supplier from which this instrument was purchased.

Safety Guidelines

General Guideline

CAUTION

• Do not place heavy objects on the instrument.

• Do not place flammable objects on the

• Avoid severe impact or rough handling that

• Avoid discharges of static electricity on or near

• Use only mating connectors, not bare wires, for

• The instrument should only be disassembled by

instrument.

may damage the function generator.

the function generator.

the terminals.

a qualified technician.

Power Supply

WARNING

Fuse

WARNING

• DC Input voltage: 5V/2A.

• Do not exceed an input voltage of 5V±5%.

• Fuse type: F3.15A/125V.

• Only qualified technicians should replace the

fuse.

• To ensure fire protection, replace the fuse only

with the specified type and rating.

• Disconnect the power and all test leads before

replacing the fuse.

• Make sure the cause of fuse blowout is fixed

before replacing the fuse.

AFG-200 SERIES USER MANUAL

Cleaning the function generator

Operation Environment

Storage environment

• Disconnect the power cord before cleaning the

function generator.

• Use a soft cloth dampened in a solution of mild

detergent and water. Do not spray any liquid into the function generator.

• Do not use chemicals containing harsh products

such as benzene, toluene, xylene, and acetone.

• Location: Indoor, no direct sunlight, dust free,

almost non-conductive pollution (Note below) and avoid strong magnetic fields.

• Relative Humidity: < 80%

• Altitude: < 2000m

• Temperature: 0°C to 40°C

(Pollution Degree) EN 61010-1:2010 specifies pollution degrees and their requirements as follows. The function generator falls under degree 2.

Pollution refers to “addition of foreign matter, solid, liquid, or gaseous (ionized gases), that may produce a reduction of dielectric strength or surface resistivity”.

• Pollution degree 1: No pollution or only dry, non-conductive pollution occurs. The pollution has no influence.

• Pollution degree 2: Normally only non-conductive pollution occurs. Occasionally, however, a temporary conductivity caused by condensation must be expected.

• Pollution degree 3: Conductive pollution occurs, or dry, non-conductive pollution occurs which becomes conductive due to condensation which is expected. In such conditions, equipment is normally protected against exposure to direct sunlight, precipitation, and full wind pressure, but neither temperature nor humidity is controlled.

• Location: Indoor

• Relative Humidity: < 70%

• Temperature: -10°C ~ 70°C

AFG-200 SERIES USER MANUAL

Disposal

Do not dispose this instrument as unsorted municipal waste. Please use a separate collection facility or contact the supplier from which this instrument was purchased. Please make sure discarded electrical waste is properly recycled to reduce environmental impact.

AFG-200 SERIES USER MANUAL

GETTING STARTED

The Getting started chapter introduces the function generator’s main features, appearance and introduces a quick instructional summary of some of the basic functions. For comprehensive operation instructions, please see the operation chapter.

Main Features

Model AFG-125 AFG-125P AFG-225 AFG-225P

Frequency Range

Output Channels 1 1 2 2

Power Output None Yes None Yes

Performance

Features

• DDS signal generator

• 1μHz resolution over the full range

• 20ppm frequency stability

• Arbitrary Waveform Capability

120 MSa/s sample rate 60 MSa/s repetition rate 4 k-point waveform length 4k waveform memory, 10 groups User-defined output DWR (Direct waveform reconstruction) capability PC waveform editing

• Sine, Square, Ramp, Pulse & Noise as standard

waveforms

• Internal LIN/LOG sweeps with marker output

• AM, FM, FSK, SUM modulation

• Triggered burst function

• Save/recall 10 setup memories

• Output overload protection

1uHz-25MHz

AFG-200 SERIES USER MANUAL

Interface

Power Supply (AFG-125P/ 225P only)

• USB interface as standard

• AWES (arbitrary waveform editing software) PC

software

• 2.5V/3.3V/5V supply output

• 0.6A current output

AFG-200 SERIES USER MANUAL

YNC

Panel Overview

Front Panel

Power Supply Status LEDs

Negative Output

GND

Positive Output

SYNC

CH1

These LEDs indicate the immediate status of the power supply function on the AFG-125P/225P:

2.5V

3.5V

OVER LOAD

2.5V output is on

3.5V output is on

5V output is on

Overload condition

Negative output port

Ground port

Positive output port

Sync output. A TTL signal is output as the sweep marker or sync output signal.

CH1 (Signal 1) output.

50Ω

AFG-200 SERIES USER MANUAL

CH2

Rear Panel

Ven t

USB Device Port

Input Power

50Ω

Vent USB Device Port Input Power

Cooling vent.

CH1 (Signal 2) output (AFG-225/AFG-225P only).

DC 5V

INPUT

2A MAX.

Interfaces with the GDS-2000A and can also provide power.

Input power source: DC 5V; 2A max.

AFG-200 SERIES USER MANUAL

System Requirements

Operating System

Microsoft Windows XP

Microsoft Windows 7

Microsoft Windows Vista

CPU

Memory

Hard Disk Space

Supports USB2.0(compatible with USB1.1)

300MHz

256MB

100MB

The USB 2.0 Universal Serial Bus specification is supported with transfer rates from USB1.1 to USB2.0.

Software Installation

Close all the programs that are currently running. Insert the included installation CD into your CD-ROM drive, and execute the following steps:

1. Execute the installer on the CD. Install the software step by step by following the prompts.

2. Connect hardware after the installation is completed. The computer will automatically search for the new hardware and install its driver. You can start to use the signal generator after the driver is installed.

AFG-200 SERIES USER MANUAL

Setup the Signal Generator

PC Communication

1. Plug the power adapter into the power input port on the rear panel.

2. Connect the type B end of the accessory USB cable to the USB B port on the signal generator, and then connect the type A end of the USB cable to the USB A port on the computer.

3. Turn on the PC and control the signal generator through the PC software.

The signal generator is ready for use.

AFG-200 SERIES USER MANUAL

Default Settings

The command *RST is used to restore the default panel settings.

Output Settings

Modulation

(AM/FM/FSK/

PM/SUM)

Function Sine Wave

Frequency 1kHz

Amplitude 1.000 Vpp

Offset 0.00V dc

Output units Vpp

Output terminal 50Ω

Power OFF

Sync OFF

Carrier wave 1kHz sine wave

Modulation wave 100Hz sine wave

AM depth 100%

FM deviation 100Hz

*RST

Sweep

FSK hop frequency 100Hz

FSK frequency 10Hz

PM phase deviation 180˚

SUM amplitude 50%

Modem status Off

Start/Stop frequency 100Hz/1kHz

Sweep time 1s

Sweep type Linear

AFG-200 SERIES USER MANUAL

Burst

System Settings

Sweep status Off

Burst frequency 1kHz

Ncycle 1

Burst period 10ms

Burst starting phase 0˚

Burst status Off

Power off signal On

Error queue Cleared

Memory settings No change

Output Off

AFG-200 SERIES USER MANUAL

REMOTE INTERFACE

Establishing a Remote Connection ....................................19

Configure USB interface.......................................................19

Remote control terminal connection...................................20

Command Syntax .................................................................21

Establishing a Remote Connection

The AFG-200 supports USB remote connections

Configure USB interface

USB configuration

PC side connector

AFG-200 series side connector

Type B, slave

Speed

Panel Operation

1. Connect the USB cable to the rear panel USB B (slave) port.

2. When the PC asks for the USB driver, select XXXXXXX.inf included in the software package or download the driver from the GW website,

www.gwinstek.com

1.1/2.0 (full speed)

AFG-200 SERIES USER MANUAL

Remote control terminal connection

Te rm i na l application

Functionality check

PC Software

Invoke the terminal application such as MTTTY (Multi-Threaded TTY). For USB, set the COM port, baud rate, stop bit, data bit, and parity accordingly.

To check the COM port No, see the Device Manager in the PC. For WinXP, Control panel → System → Hardware tab.

Run this query command via the terminal.

*idn?

This should return the Manufacturer, Model number, Serial number, and Firmware version in the following format.

GW INSTEK, AFG-X25X, SN:XXXXXXXX,Vm.mm

Note: ^j or ^m can be used as the terminal character when using a terminal program.

The proprietary PC software, downloadable from GWInstek website, can be used for remote control.

AFG-200 SERIES USER MANUAL

Command Syntax

Compatible standard

• IEEE488.2, 1992 (fully compatible)

• SCPI, 1994 (partially compatible)

Command Tree

The SCPI standard is an ASCII based standard that defines the command syntax and structure for programmable instruments.

Commands are based on a hierarchical tree structure. Each command keyword is a node on the command tree with the first keyword as the root node. Each sub node is separated with a colon.

Shown below is a section of the SOURce[1|2] root node and the :PM and :PULSe sub nodes.

Command types

Commands can be separated in to three distinc types, simple commands, compound commands and queries.

Simple

A single command with/without a parameter

Example *OPC

Compound

Two or more commands separated by a colon (:) with/without a parameter

Example SOURce1:PULSe:WIDTh

AFG-200 SERIES USER MANUAL

Query

A query is a simple or compound command followed by a question mark (?). A parameter (data) is returned. The maximum or minimum value for a parameter can also be queried where applicable.

Example

SOURce1:FREQuency? SOURce1:FREQuency? MIN

Command forms

Commands and queries have two different forms, long and short. The command syntax is written with the short form of the command in capitals and the remainder (long form) in lower case.

The commands can be written in capitals or lower-case, just so long as the short or long forms are complete. An incomplete command will not be recognized.

Below are examples of correctly written commands:

LONG SOURce1:DCOffset

SOURCE1:DCOFFSET

source1:dcoffset

SHORT

SOUR1:DCO

sour1:dco

AFG-200 SERIES USER MANUAL

Command Format

1: command header

2: single space

3: parameter

4: message terminator

Square Brackets []

Commands that contain squares brackets indicate that the contents are optional. The function of the command is the same with or without the square bracketed items. Brackets are not sent with the command.

For example, the frequency query below can use any of

the following 3 forms:

SOURce1:FREQuency? [MINimum|MAXimum]

SOURce1:FREQuency? MAXimum

SOURce1:FREQuency? MINimum

SOURce1:FREQuency?

Braces {}

Commands that contain braces indicate one item within the braces must be chosen. Braces are not sent with the command.

Angled Brackets <>

Angle brackets are used to indicate that a value must be specified for the parameter. See the parameter description below for details. Angled brackets are not sent with the command.

Bars |

Bars are used to separate multiple parameter choices in the command format.

Parameters Type Description Example

<NR1>

<NR2>

<NR3>

<NRf>

Boolean logic 0, 1/ON,OFF

integers 0, 1, 2, 3

decimal numbers

0.1, 3.14, 8.5

floating point 4.5e-1, 8.25e+1

any of NR1, 2, 3 1, 1.5, 4.5e-1

AFG-200 SERIES USER MANUAL

<NRf+>

NRf type with a suffix including MINimum, MAXimum or DEFault parameters.

<aard>

Arbitrary ASCII characters.

Discrete ASCII character parameters

NRf+ type including frequency unit suffixes.

NRf+ type including voltage peak to peak.

NRf+ type including volt unit suffixes.

1, 1.5, 4.5e-1

MAX, MIN,

IMM, MAN

1 KHZ, 1.0 HZ, ΜHZ

VPP

NRf+ type including time unit suffixes.

NRf type N/A

Message terminators

EOI

Note

LF CR

line feed code (new line) and carriage return.

line feed code (new line)

IEEE-488 EOI (End-Or-Identify)

^j or ^m should be used when using a terminal program.

NS, S MS US

AFG-200 SERIES USER MANUAL

Command Separators

Semicolon (;)

Colon +

Comma (,)

Space

Colon (:)

Semicolon (:;)

A space is used to separate a parameter from a keyword/command header.

A colon is used to separate keywords on each node.

A semi colon is used to separate subcommands that have the same node level.

For example: SOURce[1|2]:DCOffset?

SOURce[1|2]:OUTPut? ÆSOURce1:DCOffset?;OUTPut?

A colon and semicolon can be used to combine commands from different node levels.

For example: SOURce1:PM:SOURce?

SOURce:PULSe:WIDTh? ÆSOURce1:PM:SOURce?:;SOURce: PULSe:WIDTh?

When a command uses multiple parameters, a comma is used to separate the parameters.

For example: SOURce:APPLy:SQUare 10KHZ, 2.0

VPP, -1V

AFG-200 SERIES USER MANUAL

System Command

SYSTem:ERRor?

Description

Query Syntax SYSTem:ERRor?

Return parameter <string> Returns an error string,

Example SYSTem:ERRor?

Reads an error from the error queue. See page 122 for details regarding the error queue.

-138 Suffix not allowed

Returns an error string.

*IDN?

Description

Query Syntax *IDN?

Return parameter <string>

Example *IDN?

Returns the function generator manufacturer, model number, serial number and firmware version number in the following format:

GW INSTEK,AFG-X25X,SN:XXXXXXXX,Vm.mm

GW INSTEK,AFG-225,SN:XXXXXXXX,Vm.mm

System Query

<256 ASCII characters.

System Query

Returns the identification of the function generator.

AFG-200 SERIES USER MANUAL

*RST

Description

Reset the function generator to its factory default

System Command

state.

Note

Note the *RST command will not delete instrument save states in memory.

Syntax *RST

SYSTem:VERSion?

Description

Performs a system version query. Returns a string

System Query

with the instrument, firmware version, FPGA revision

Query Syntax SYSTem:VERSion?

Return parameter <string>

Example SYST:VERS?

AFG-225 VX.XXX_XXXX

*OPC

Description

Returns the year and version for that year (1).

System Command

This command sets the Operation Complete Bit (bit 0) of the Standard Event Status Register after the function generator has completed all pending operations. For the AFG-200 series, the *OPC command is used to indicate when a sweep or burst has completed.

Note

Before the OPC bit is set, other commands may be executed.

Syntax *OPC

AFG-200 SERIES USER MANUAL

*OPC?

Description

Note

Query Syntax *OPC?

Return parameter 1

Example *OPC?

Returns the OPC bit to the output buffer when all pending operations have completed. I.e. when the OPC bit is set.

Commands cannot be executed until the *OPC? query has completed.

Returns a “1” when all pending operations are complete.

*WAI

Description

Note

This command waits until all pending operations have completed before executing additional commands. I.e., when the OPC bit is set.

This command is only used for triggered sweep and burst modes.

System Query

System Command

Syntax *WAI

AFG-200 SERIES USER MANUAL

Status Register Commands

*CLS

Description

Syntax *CLS

The *CLS command clears all the event registers, the error queue and cancels an *OPC command.

*ESE

Description

Note

Syntax *ESE <enable value>

Parameter

Example *ESE 20

The Standard Event Status Enable command determines which events in the Standard Event Status Event register can set the Event Summary Bit (ESB) of the Status Byte register. Any bit positions set to 1 enable the corresponding event. Any enabled events set bit 5 (ESB) of the Status Byte register.

The *CLS command clears the event register, but not the enable register.

<enable value> 0~255

Sets a bit weight of 20 (bits 2 and 4).

System Command

Query Syntax *ESE?

Return Parameter

Bit Register Bit Register 0 Not used 4 Message Available

1 Not used 5 Standard Event

2 Error Queue 6 Master Summary

3 Questionable

Data

7 Not used

AFG-200 SERIES USER MANUAL

Example *ESE?

*ESR?

Description

Bit 2 is set.

System Command

Reads and clears the Standard Event Status Register. The bit weight of the standard event status register is returned.

Note

The *CLS will also clear the standard event status register.

Query Syntax *ESR?

Return Parameter Bit Register Bit Register

0 Operation

4 Execution Error

Complete

1 Not Used 5 Command Error

2 Query Error 6 Not Used

3 Device Error 7 Power On

Query Example *ESR?

Returns the bit weight of the standard event status register (bit 0 and 2).

*STB?

Description

Note

Syntax *STB?

Reads the Status byte condition register.

Bit 6, the master summary bit, is not cleared.

System Command

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