Tektronix 2601B-PULSE Reference manual

Model 2601B-PULSE

tek.com/keithley

System SourceMeter

Reference Manual

2601B-PULSE-901-01 Rev. B November 2021

®

Instrument

*P2601B-PULSE-901-01B*

2601B-PULSE-901-01B

System SourceMeter® Instrument

Reference Manual

Model 2601B-PULSE

© 2021, Keithley Instruments, LLC

Cleveland, Ohio, U.S.A.

All rights reserved.

Any unauthorized reproduction, photocopy, or use of the information herein, in whole or in part,

without the prior written approval of Keithley Instruments, LLC, is strictly prohibited.

These are the original instructions in English.

TSPTM and TSP-LinkTM are trademarks of Keithley Instruments, LLC. All Keithley Instruments

product names are trademarks or registered trademarks of Keithley Instruments, LLC. Other brand

names are trademarks or registered trademarks of their respective holders.

The Lua 5.0 software and associated documentation files are copyright © 1994 - 2015, Lua.org,

PUC-Rio. You can access terms of license for the Lua software and associated documentation at

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Microsoft, Visual C++, Excel, and Windows are either registered trademarks or trademarks of

Microsoft Corporation in the United States and/or other countries.

Document number: 2601B-PULSE-901-01 Rev. B November 2021

Safety precautions

The following safety precautions should be observed before using this product and any associated instrumentation. Although
some instruments and accessories would normally be used with nonhazardous voltages, there are situations where hazardous
conditions may be present.

This product is intended for use by personnel who recognize shock hazards and are familiar with the safety precautions required
to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before using the
product. Refer to the user documentation for complete product specifications.

If the product is used in a manner not specified, the protection provided by the product warranty may be impaired.
The types of product users are:

Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring that the
equipment is operated within its specifications and operating limits, and for ensuring that operators are adequately trained.

Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the
instrument. They must be protected from electric shock and contact with hazardous live circuits.

Maintenance personnel perform routine procedures on the product to keep it operating properly, for example, setting the line
voltage or replacing consumable materials. Maintenance procedures are described in the user documentation. The procedures
explicitly state if the operator may perform them. Otherwise, they should be performed only by service personnel.

Service personnel are trained to work on live circuits, perform safe installations, and repair products. Only properly trained
service personnel may perform installation and service procedures.

Keithley products are designed for use with electrical signals that are measurement, control, and data I/O connections, with low
transient overvoltages, and must not be directly connected to mains voltage or to voltage sources with high transient
overvoltages. Measurement Category II (as referenced in IEC 60664) connections require protection for high transient
overvoltages often associated with local AC mains connections. Certain Keithley measuring instruments may be connected to
mains. These instruments will be marked as category II or higher.

Unless explicitly allowed in the specifications, operating manual, and instrument labels, do not connect any instrument to mains.
Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test

fixtures. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than
30 V RMS, 42.4 V peak, or 60 VDC are present. A good safety practice is to expect that hazardous voltage is present in any
unknown circuit before measuring.

Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators
are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential
human contact. Product operators in these circumstances must be trained to protect themselves from the risk of electric shock. If
the circuit is capable of operating at or above 1000 V, no conductive part of the circuit may be exposed.

Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance-limited
sources. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective
devices to limit fault current and voltage to the card.

Before operating an instrument, ensure that the line cord is connected to a properly-grounded power receptacle. Inspect the
connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.

When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate main input
power disconnect device must be provided in close proximity to the equipment and within easy reach of the operator.

For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under
test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting
cables or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers.

Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth)
ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the
voltage being measured.

For safety, instruments and accessories must be used in accordance with the operating instructions. If the instruments or
accessories are used in a manner not specified in the operating instructions, the protection provided by the equipment may be
impaired.

Do not exceed the maximum signal levels of the instruments and accessories. Maximum signal levels are defined in the
specifications and operating information and shown on the instrument panels, test fixture panels, and switching cards.

When fuses are used in a product, replace with the same type and rating for continued protection against fire hazard.
Chassis connections must only be used as shield connections for measuring circuits, NOT as protective earth (safety ground)

connections.
If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use

of a lid interlock.

If a screw is present, connect it to protective earth (safety ground) using the wire recommended in the user documentation.
The symbol on an instrument means caution, risk of hazard. The user must refer to the operating instructions located in the

user documentation in all cases where the symbol is marked on the instrument.
The symbol on an instrument means warning, risk of electric shock. Use standard safety precautions to avoid personal

contact with these voltages.
The symbol on an instrument shows that the surface may be hot. Avoid personal contact to prevent burns.

The symbol indicates a connection terminal to the equipment frame.
If this symbol is on a product, it indicates that mercury is present in the display lamp. Please note that the lamp must be

properly disposed of according to federal, state, and local laws.
The WARNING heading in the user documentation explains hazards that might result in personal injury or death. Always read

the associated information very carefully before performing the indicated procedure.
The CAUTION heading in the user documentation explains hazards that could damage the instrument. Such damage may

invalidate the warranty.
The CAUTION heading with the symbol in the user documentation explains hazards that could result in moderate or minor

injury or damage the instrument. Always read the associated information very carefully before performing the indicated
procedure. Damage to the instrument may invalidate the warranty.

Instrumentation and accessories shall not be connected to humans.
Before performing any maintenance, disconnect the line cord and all test cables.
To maintain protection from electric shock and fire, replacement components in mains circuits — including the power

transformer, test leads, and input jacks — must be purchased from Keithley. Standard fuses with applicable national safety
approvals may be used if the rating and type are the same. The detachable mains power cord provided with the instrument may
only be replaced with a similarly rated power cord. Other components that are not safety-related may be purchased from other
suppliers as long as they are equivalent to the original component (note that selected parts should be purchased only through
Keithley to maintain accuracy and functionality of the product). If you are unsure about the applicability of a replacement
component, call a Keithley office for information.

Unless otherwise noted in product-specific literature, Keithley instruments are designed to operate indoors only, in the following
environment: Altitude at or below 2,000 m (6,562 ft); temperature 0 °C to 50 °C (32 °F to 122 °F); and pollution degree 1 or 2.

To clean an instrument, use a cloth dampened with deionized water or mild, water-based cleaner. Clean the exterior of the
instrument only. Do not apply cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that
consist of a circuit board with no case or chassis (e.g., a data acquisition board for installation into a computer) should never
require cleaning if handled according to instructions. If the board becomes contaminated and operation is affected, the board
should be returned to the factory for proper cleaning/servicing.

Safety precaution revision as of June 2018.

Introduction .............................................................................................................. 1-1

Welcome .............................................................................................................................. 1-1

Extended warranty ............................................................................................................... 1-1

Contact information .............................................................................................................. 1-1

Customer documentation ..................................................................................................... 1-2

Product software and drivers ............................................................................................... 1-2

Capabilities and features...................................................................................................... 1-3

Sourcing and measuring ......................................................................................... 2-1

Basic source-measure procedure ........................................................................................ 2-1

Front-panel source-measure procedure .................................................................................... 2-2

Remote source-measure commands ........................................................................................ 2-4

Combining SMU outputs ...................................................................................................... 2-5

Source current using two 2601B-PULSE instruments in parallel ............................................... 2-7

Source voltage using two 2601B-PULSE instruments in series .............................................. 2-10

Source voltage with extended current using two 2601B-PULSE instruments in parallel ......... 2-13

Output-off modes ............................................................................................................... 2-16

Normal output-off mode .......................................................................................................... 2-16

High-impedance output-off mode ............................................................................................ 2-16

Zero output-off mode ............................................................................................................... 2-16

Saved setups ..................................................................................................................... 2-17

Saving user setups .................................................................................................................. 2-17

Start-up configuration .............................................................................................................. 2-19

Restoring the factory default setups using remote commands ................................................ 2-19

Operation considerations for the ADC ............................................................................... 2-20

Autozero .................................................................................................................................. 2-20

NPLC caching ......................................................................................................................... 2-21

Triggering in local mode ..................................................................................................... 2-21

Configuring trigger attributes in local mode ....................................................................... 2-22

Front-panel triggering example ............................................................................................... 2-23

Configuring for measure-only tests using the MODE key .................................................. 2-23

Voltmeter and ammeter measurements ............................................................................. 2-24

Ohms measurements ......................................................................................................... 2-25

Ohms ranging .......................................................................................................................... 2-25

Basic ohms measurement procedure ...................................................................................... 2-25

Ohms sensing ......................................................................................................................... 2-27

Power measurements ........................................................................................................ 2-28

Basic power measurement procedure ..................................................................................... 2-29

Power measurements using the remote interface ................................................................... 2-30

Range ................................................................................................................................. 2-30

Available ranges ...................................................................................................................... 2-31

Maximum source values and readings .................................................................................... 2-31

Measure autodelay .................................................................................................................. 2-32

Manual ranging ....................................................................................................................... 2-32

Table of contents

Table of contents Model 2601B-PULSE System SourceMeter® Instrument Reference Manual

Ranging limitations .................................................................................................................. 2-32

Autoranging ............................................................................................................................. 2-33

Low range limits ...................................................................................................................... 2-33

Range considerations ............................................................................................................. 2-34

Range commands ................................................................................................................... 2-35

Range programming example ................................................................................................. 2-36

Digits .................................................................................................................................. 2-36

Setting display resolution from the front panel ........................................................................ 2-36

Setting display resolution from a remote interface .................................................................. 2-36

Speed when the pulser is disabled .................................................................................... 2-37

Setting the speed from the front panel .................................................................................... 2-37

Setting the speed using the remote interface .......................................................................... 2-37

Sweep operation ................................................................................................................ 2-38

Linear staircase sweeps .......................................................................................................... 2-40

Logarithmic staircase sweeps ................................................................................................. 2-41

List sweeps ............................................................................................................................. 2-45

Pulse sweeps .......................................................................................................................... 2-46

Configuring and running sweeps ............................................................................................. 2-48

Sweeping using factory scripts ................................................................................................ 2-50

Sweep programming examples ............................................................................................... 2-51

Relative offset .................................................................................................................... 2-52

Enabling and disabling relative offset from the front panel ...................................................... 2-52

Defining a relative offset value from the front panel ................................................................ 2-53

Setting relative offset using a remote interface ....................................................................... 2-53

Filters.................................................................................................................................. 2-53

Filter types............................................................................................................................... 2-54

Response time ........................................................................................................................ 2-55

Enabling the filter from the front panel .................................................................................... 2-56

Configuring the filter from the front panel ................................................................................ 2-56

Setting the filter using a remote interface ................................................................................ 2-56

High-capacitance mode ..................................................................................................... 2-57

Understanding high-capacitance mode ................................................................................... 2-57

Enabling high-capacitance mode ............................................................................................ 2-60

Reading buffers ........................................................................................................ 3-1

Overview .............................................................................................................................. 3-1

Front-panel reading buffer control ........................................................................................ 3-1

Reading buffer options .............................................................................................................. 3-1

Configuring reading buffers ....................................................................................................... 3-2

Appending or overwriting existing reading buffers ..................................................................... 3-3

Storage operation ...................................................................................................................... 3-3

Saving reading buffers .............................................................................................................. 3-4

Recalling readings ..................................................................................................................... 3-5

Remote reading buffer programming ................................................................................... 3-6

Dedicated reading buffer designations ...................................................................................... 3-6

Reading buffer commands ........................................................................................................ 3-6

Buffer status ............................................................................................................................ 3-11

Dynamic reading buffers ......................................................................................................... 3-11

Buffer examples ...................................................................................................................... 3-12

Triggering ................................................................................................................. 4-1

Triggering ............................................................................................................................. 4-1

Model 2601B-PULSE System SourceMeter® Instrument Reference Manual Table of contents

Remote triggering overview ................................................................................................. 4-1

Using the trigger model ............................................................................................................. 4-3

SMU event detectors ............................................................................................................ 4-8

Clearing SMU event detectors .................................................................................................. 4-9

Using the TRIG key to trigger a sweep ..................................................................................... 4-9

Using trigger events to start actions on trigger objects ...................................................... 4-10

Action overruns ....................................................................................................................... 4-11

Digital I/O port and TSP-Link synchronization lines ........................................................... 4-11

Mode ....................................................................................................................................... 4-12

Pulse width ................................ .............................................................................................. 4-12

Trigger configuration on hardware lines .................................................................................. 4-12

Action overruns on hardware lines .......................................................................................... 4-14

Timers ................................................................................................................................ 4-14

Timer attributes ....................................................................................................................... 4-14

Triggering a timer .................................................................................................................... 4-15

Timer action overruns ............................................................................................................. 4-16

Using timers to perform pulsed sweeps .................................................................................. 4-16

Event blenders ................................................................................................................... 4-22

Event blender modes .............................................................................................................. 4-22

Assigning input trigger events ................................................................................................. 4-23

Action overruns ....................................................................................................................... 4-23

LAN triggering overview ..................................................................................................... 4-23

Understanding hardware value and pseudo line state ............................................................ 4-23

Understanding LXI trigger event designations ........................................................................ 4-24

Generating LXI trigger packets ................................................................................................ 4-24

Command interface triggering ............................................................................................ 4-25

Trigger generator ............................................................................................................... 4-25

Manual triggering ............................................................................................................... 4-26

Interactive triggering ........................................................................................................... 4-26

Detecting trigger events using the wait() function .................................................................... 4-26

Using the assert function to generate output triggers .............................................................. 4-27

Using the release function of the hardware lines ..................................................................... 4-27

Using the set function to bypass SMU event detectors ........................................................... 4-28

Event detector overruns .......................................................................................................... 4-28

Examples using interactive triggering ...................................................................................... 4-29

Hardware trigger modes..................................................................................................... 4-30

Falling edge trigger mode ....................................................................................................... 4-31

Rising edge master trigger mode ............................................................................................ 4-32

Rising edge acceptor trigger mode ......................................................................................... 4-33

Either edge trigger mode ......................................................................................................... 4-34

Understanding synchronous triggering modes .................................................................. 4-35

Synchronous master trigger mode (SynchronousM) ............................................................... 4-35

Synchronous acceptor trigger mode (SynchronousA) ............................................................. 4-36

Synchronous trigger mode ...................................................................................................... 4-37

Digital I/O ........................................................................................................................... 4-38

Port configuration .................................................................................................................... 4-38

Digital I/O configuration ........................................................................................................... 4-40

Controlling digital I/O lines....................................................................................................... 4-40

TSP-Link trigger lines .............................................................................................................. 4-43

Table of contents Model 2601B-PULSE System SourceMeter® Instrument Reference Manual

Theory of operation ................................................................................................. 5-1

Analog-to-digital converters ................................................................................................. 5-1

Source-measure concepts ................................................................................................... 5-1

Limit principles .......................................................................................................................... 5-2

Power equations ....................................................................................................................... 5-2

Duty cycle with the pulser disabled ........................................................................................... 5-2

Duty cycle with the pulser enabled ............................................................................................ 5-4

Optimizing apertures and filters for the 1 MS/s sample rate ...................................................... 5-5

Operating boundaries ................................................................................................................ 5-6

Basic circuit configurations ................................................................ ................................ ...... 5-20

Guard ...................................................................................................................................... 5-25

Measurement settling time considerations ......................................................................... 5-28

Programming example for controlling settling time delay ........................................................ 5-28

Effects of load on current source settling time ................................................................... 5-29

Creating pulses with the 2601B-PULSE SMU ................................................................... 5-30

Pulse rise and fall times .......................................................................................................... 5-30

SMU pulse width ..................................................................................................................... 5-31

Introduction to TSP operation ................................................................................. 6-1

Introduction to TSP operation .............................................................................................. 6-1

Controlling the instrument by sending individual command messages ..................................... 6-1

Queries ..................................................................................................................................... 6-3

Information on scripting and programming ................................................................................ 6-3

About TSP commands ......................................................................................................... 6-3

Beeper control ........................................................................................................................... 6-3

Bit manipulation and logic operations ........................................................................................ 6-4

Calibration ................................................................................................................................. 6-5

Data queue................................................................................................................................ 6-5

Digital I/O .................................................................................................................................. 6-5

Display ...................................................................................................................................... 6-6

Error queue ............................................................................................................................... 6-7

Event log ................................................................................................................................... 6-7

File I/O ...................................................................................................................................... 6-7

GPIB ......................................................................................................................................... 6-9

Instrument identification ............................................................................................................ 6-9

LAN and LXI ............................................................................................................................ 6-10

Miscellaneous ......................................................................................................................... 6-11

Parallel script execution .......................................................................................................... 6-11

Queries and response messages ............................................................................................ 6-12

Reading buffer ......................................................................................................................... 6-12

Reset ....................................................................................................................................... 6-13

RS-232 .................................................................................................................................... 6-13

Saved setups .......................................................................................................................... 6-13

Scripting .................................................................................................................................. 6-13

SMU ........................................................................................................................................ 6-14

Status model ........................................................................................................................... 6-16

Time ........................................................................................................................................ 6-17

Triggering ................................................................................................................................ 6-17

TSP-Link ................................................................................................................................. 6-19

TSP-Net .................................................................................................................................. 6-19

Userstrings .............................................................................................................................. 6-20

Factory scripts .................................................................................................................... 6-20

Running a factory script .......................................................................................................... 6-21

Model 2601B-PULSE System SourceMeter® Instrument Reference Manual Table of contents

Retrieving and modifying a factory script listing ...................................................................... 6-21

KISweep factory script ............................................................................................................ 6-22

KIHighC factory script ............................................................................................................. 6-22

KIParlib factory script .............................................................................................................. 6-22

KISavebuffer factory script ...................................................................................................... 6-22

Instrument programming ......................................................................................... 7-1

Fundamentals of scripting for TSP ....................................................................................... 7-1

What is a script? ........................................................................................................................ 7-2

Runtime and nonvolatile memory storage of scripts .................................................................. 7-2

What can be included in scripts? ............................................................................................... 7-2

Commands that cannot be used in scripts ................................................................................ 7-3

Manage scripts .......................................................................................................................... 7-3

Working with scripts in nonvolatile memory............................................................................. 7-11

Programming example: Interactive script ................................................................................ 7-13

Fundamentals of programming for TSP ............................................................................. 7-14

What is Lua? ........................................................................................................................... 7-15

Lua basics ............................................................................................................................... 7-15

Standard libraries .................................................................................................................... 7-29

Programming example: User script ......................................................................................... 7-33

Password management ..................................................................................................... 7-33

Setting the password from a command or web interface ........................................................ 7-34

Unlocking the remote interface ................................................................................................ 7-35

Resetting the password ........................................................................................................... 7-35

Key-press codes ................................................................................................................ 7-35

Sending key codes .................................................................................................................. 7-35

Capturing key-press codes...................................................................................................... 7-36

Test Script Builder .............................................................................................................. 7-37

Installing the TSB software...................................................................................................... 7-37

Using Test Script Builder (TSB) .............................................................................................. 7-38

Project navigator ..................................................................................................................... 7-39

Script editor ............................................................................................................................. 7-40

Outline view............................................................................................................................. 7-40

Programming interaction ......................................................................................................... 7-41

Working with TSB Embedded ............................................................................................ 7-41

Simplify the display ................................................................................................................. 7-42

Create a script using TSB Embedded ..................................................................................... 7-42

Copy an existing script ............................................................................................................ 7-42

Run a script ............................................................................................................................. 7-43

Delete a script ......................................................................................................................... 7-43

Modify a script ......................................................................................................................... 7-43

Import a script from a computer .............................................................................................. 7-43

Export a script to a computer .................................................................................................. 7-44

Export a script to the instrument USB ..................................................................................... 7-44

Reset the instrument using TSB Embedded ........................................................................... 7-44

Send individual instrument commands with TSB Embedded .................................................. 7-45

Advanced scripting for TSP ............................................................................................... 7-45

Global variables and the script.user.scripts table .................................................................... 7-45

Create a script using the script.new() command ..................................................................... 7-47

Rename a script ...................................................................................................................... 7-49

Retrieve a user script .............................................................................................................. 7-51

Delete user scripts from the instrument ................................................................................... 7-52

Restore a script to the runtime environment ........................................................................... 7-53

Memory considerations for the runtime environment .............................................................. 7-53

TSP-Link system expansion interface ................................................................................ 7-55

Table of contents Model 2601B-PULSE System SourceMeter® Instrument Reference Manual

Master and subordinates ......................................................................................................... 7-55

TSP-Link nodes ....................................................................................................................... 7-56

Connections ............................................................................................................................ 7-56

Initialization ............................................................................................................................. 7-57

Resetting the TSP-Link network .............................................................................................. 7-57

Accessing nodes ..................................................................................................................... 7-58

Using the reset() command ..................................................................................................... 7-59

Using the abort command ....................................................................................................... 7-60

Triggering with TSP-Link ......................................................................................................... 7-60

TSP advanced features ........................................................................................................... 7-60

Using groups to manage nodes on TSP-Link network ............................................................ 7-63

Running simultaneous test scripts ........................................................................................... 7-64

Using the data queue for real-time communication ................................................................. 7-65

Copying test scripts across the TSP-Link network .................................................................. 7-66

Removing stale values from the reading buffer cache ............................................................ 7-66

TSP-Net ............................................................................................................................. 7-67

TSP-Net capabilities ................................................................................................................ 7-67

Using TSP-Net with any ethernet-enabled instrument ............................................................ 7-68

TSP-Net compared to TSP-Link to communicate with TSP-enabled devices ......................... 7-70

TSP-Net instrument commands: General device control ........................................................ 7-70

TSP-Net instrument commands: TSP-enabled device control ................................................ 7-70

Example: Using tspnet commands .......................................................................................... 7-71

TSP command reference ......................................................................................... 8-1

TSP command programming notes ..................................................................................... 8-1

Placeholder text ........................................................................................................................ 8-1

Syntax rules .............................................................................................................................. 8-2

Time and date values ................................................................................................................ 8-2

Settings ignored when the pulser is enabled ................................................................ ............. 8-3

Settings ignored when the pulser is disabled ............................................................................ 8-3

Using the TSP command reference ..................................................................................... 8-4

Command name and summary table ........................................................................................ 8-4

Command usage ....................................................................................................................... 8-6

Command details ...................................................................................................................... 8-6

Example section ........................................................................................................................ 8-7

Related commands and information .......................................................................................... 8-7

TSP commands .................................................................................................................... 8-8

beeper.beep() ............................................................................................................................ 8-8

beeper.enable ........................................................................................................................... 8-8

bit.bitand() ................................................................................................................................. 8-9

bit.bitor() .................................................................................................................................. 8-10

bit.bitxor() ................................................................................................................................ 8-10

bit.clear() ................................................................................................................................. 8-11

bit.get() .................................................................................................................................... 8-12

bit.getfield() ............................................................................................................................. 8-13

bit.set() .................................................................................................................................... 8-14

bit.setfield().............................................................................................................................. 8-15

bit.test() ................................................................................................................................... 8-16

bit.toggle() ............................................................................................................................... 8-17

bufferVar.appendmode ........................................................................................................... 8-18

bufferVar.basetimestamp ........................................................................................................ 8-19

bufferVar.cachemode .............................................................................................................. 8-20

bufferVar.capacity ................................................................................................................... 8-21

bufferVar.clear() ...................................................................................................................... 8-22

bufferVar.clearcache() ............................................................................................................. 8-22

bufferVar.collectsourcevalues ................................................................................................. 8-23

bufferVar.collecttimestamps .................................................................................................... 8-24

Model 2601B-PULSE System SourceMeter® Instrument Reference Manual Table of contents

bufferVar.fillcount .................................................................................................................... 8-25

bufferVar.fillmode .................................................................................................................... 8-26

bufferVar.measurefunctions .................................................................................................... 8-26

bufferVar.measureranges ....................................................................................................... 8-28

bufferVar.n .............................................................................................................................. 8-29

bufferVar.readings ................................................................................................................... 8-30

bufferVar.sourcefunctions ....................................................................................................... 8-31

bufferVar.sourceoutputstates .................................................................................................. 8-32

bufferVar.sourceranges ........................................................................................................... 8-33

bufferVar.sourcevalues ........................................................................................................... 8-34

bufferVar.statuses ................................................................................................................... 8-35

bufferVar.timestampresolution ................................................................................................ 8-36

bufferVar.timestamps .............................................................................................................. 8-37

dataqueue.add() ...................................................................................................................... 8-38

dataqueue.CAPACITY ............................................................................................................ 8-39

dataqueue.clear() .................................................................................................................... 8-40

dataqueue.count ..................................................................................................................... 8-41

dataqueue.next() ..................................................................................................................... 8-42

delay() ..................................................................................................................................... 8-43

digio.readbit() .......................................................................................................................... 8-43

digio.readport() ........................................................................................................................ 8-44

digio.trigger[N].assert() ............................................................................................................ 8-45

digio.trigger[N].clear() .............................................................................................................. 8-45

digio.trigger[N].EVENT_ID ...................................................................................................... 8-46

digio.trigger[N].mode ............................................................................................................... 8-46

digio.trigger[N].overrun ............................................................................................................ 8-48

digio.trigger[N].pulsewidth ....................................................................................................... 8-48

digio.trigger[N].release() .......................................................................................................... 8-49

digio.trigger[N].reset() ............................................................................................................. 8-50

digio.trigger[N].stimulus ........................................................................................................... 8-51

digio.trigger[N].wait() ............................................................................................................... 8-52

digio.writebit() .......................................................................................................................... 8-53

digio.writeport() ....................................................................................................................... 8-54

digio.writeprotect ..................................................................................................................... 8-54

display.clear() .......................................................................................................................... 8-55

display.getannunciators() ........................................................................................................ 8-55

display.getcursor() ................................................................................................................... 8-57

display.getlastkey() ................................................................................................................. 8-58

display.gettext() ....................................................................................................................... 8-59

display.inputvalue() ................................................................................................................. 8-60

display.loadmenu.add() ........................................................................................................... 8-62

display.loadmenu.catalog() ..................................................................................................... 8-63

display.loadmenu.delete() ....................................................................................................... 8-64

display.locallockout ................................................................................................................. 8-64

display.menu() ......................................................................................................................... 8-65

display.numpad ....................................................................................................................... 8-66

display.prompt() ...................................................................................................................... 8-66

display.screen ......................................................................................................................... 8-68

display.sendkey() .................................................................................................................... 8-68

display.smua.digits .................................................................................................................. 8-69

display.setcursor() ................................................................................................................... 8-70

display.settext() ....................................................................................................................... 8-71

display.smua.limit.func ............................................................................................................ 8-72

display.smua.measure.func..................................................................................................... 8-73

display.trigger.clear() ............................................................................................................... 8-73

display.trigger.EVENT_ID ....................................................................................................... 8-74

display.trigger.overrun ............................................................................................................. 8-74

display.trigger.wait() ................................................................................................................ 8-75

display.waitkey() ...................................................................................................................... 8-75

errorqueue.clear() ................................................................................................................... 8-77

errorqueue.count ..................................................................................................................... 8-77

Table of contents Model 2601B-PULSE System SourceMeter® Instrument Reference Manual

errorqueue.next() .................................................................................................................... 8-78

eventlog.all() ............................................................................................................................ 8-79

eventlog.clear() ....................................................................................................................... 8-79

eventlog.count ......................................................................................................................... 8-80

eventlog.enable ....................................................................................................................... 8-80

eventlog.next() ........................................................................................................................ 8-81

eventlog.overwritemethod ....................................................................................................... 8-82

exit() ........................................................................................................................................ 8-83

fileVar:close() .......................................................................................................................... 8-83

fileVar:flush() ........................................................................................................................... 8-84

fileVar:read() ........................................................................................................................... 8-85

fileVar:seek() ........................................................................................................................... 8-87

fileVar:write() ........................................................................................................................... 8-88

format.asciiprecision ............................................................................................................... 8-89

format.byteorder ...................................................................................................................... 8-90

format.data .............................................................................................................................. 8-91

fs.chdir() .................................................................................................................................. 8-92

fs.cwd() ................................................................................................................................... 8-93

fs.is_dir() ................................................................................................................................. 8-93

fs.is_file() ................................................................................................................................. 8-94

fs.mkdir() ................................................................................................................................. 8-95

fs.readdir() ................................ ................................ ............................................................... 8-95

fs.rmdir() ................................................................................................................................ .. 8-96

gettimezone() .......................................................................................................................... 8-97

gm_isweep() ............................................................................................................................ 8-97

gm_vsweep() ........................................................................................................................... 8-98

gpib.address ............................................................................................................................ 8-99

i_leakage_measure() ............................................................................................................ 8-100

i_leakage_threshold() ............................................................................................................ 8-101

io.close()................................................................................................................................ 8-103

io.flush() ................................................................................................................................ 8-103

io.input() ................................................................................................................................ 8-104

io.open() ................................................................................................................................ 8-105

io.output() .............................................................................................................................. 8-106

io.read() ................................................................................................................................. 8-107

io.type() ................................................................................................................................. 8-108

io.write() ................................................................................................................................ 8-109

lan.applysettings() ................................................................................................................. 8-111

lan.autoconnect ..................................................................................................................... 8-111

lan.config.dns.address[N] ...................................................................................................... 8-112

lan.config.dns.domain ........................................................................................................... 8-113

lan.config.dns.dynamic .......................................................................................................... 8-114

lan.config.dns.hostname ....................................................................................................... 8-114

lan.config.dns.verify .............................................................................................................. 8-115

lan.config.duplex ................................................................................................................... 8-116

lan.config.gateway ................................................................................................................ 8-116

lan.config.ipaddress .............................................................................................................. 8-117

lan.config.method .................................................................................................................. 8-118

lan.config.speed .................................................................................................................... 8-118

lan.config.subnetmask .......................................................................................................... 8-119

lan.linktimeout ....................................................................................................................... 8-120

lan.lxidomain ......................................................................................................................... 8-120

lan.nagle................................................................................................................................ 8-121

lan.reset() .............................................................................................................................. 8-121

lan.restoredefaults() .............................................................................................................. 8-122

lan.status.dns.address[N] ...................................................................................................... 8-123

lan.status.dns.name ................................................................ .............................................. 8-123

lan.status.duplex ................................................................................................................... 8-124

lan.status.gateway ................................................................................................................ 8-125

lan.status.ipaddress .............................................................................................................. 8-125

lan.status.macaddress .......................................................................................................... 8-126

Model 2601B-PULSE System SourceMeter® Instrument Reference Manual Table of contents

lan.status.port.dst .................................................................................................................. 8-126

lan.status.port.rawsocket ...................................................................................................... 8-127

lan.status.port.telnet .............................................................................................................. 8-127

lan.status.port.vxi11 .............................................................................................................. 8-128

lan.status.speed .................................................................................................................... 8-128

lan.status.subnetmask .......................................................................................................... 8-129

lan.timedwait ......................................................................................................................... 8-129

lan.trigger[N].assert() ............................................................................................................ 8-130

lan.trigger[N].clear() .............................................................................................................. 8-130

lan.trigger[N].connect() .......................................................................................................... 8-131

lan.trigger[N].connected ........................................................................................................ 8-132

lan.trigger[N].disconnect() ..................................................................................................... 8-132

lan.trigger[N].EVENT_ID ....................................................................................................... 8-133

lan.trigger[N].ipaddress ......................................................................................................... 8-133

lan.trigger[N].mode ................................................................................................................ 8-134

lan.trigger[N].overrun ............................................................................................................ 8-135

lan.trigger[N].protocol ............................................................................................................ 8-136

lan.trigger[N].pseudostate ..................................................................................................... 8-136

lan.trigger[N].stimulus ........................................................................................................... 8-137

lan.trigger[N].wait() ................................................................................................................ 8-138

localnode.autolinefreq ........................................................................................................... 8-139

localnode.description ............................................................................................................ 8-140

localnode.license ................................................................................................................... 8-140

localnode.linefreq .................................................................................................................. 8-141

localnode.model .................................................................................................................... 8-142

localnode.password .............................................................................................................. 8-142

localnode.passwordmode ..................................................................................................... 8-143

localnode.prompts ................................................................................................................. 8-144

localnode.prompts4882 ......................................................................................................... 8-145

localnode.reset() ................................................................................................................... 8-145

localnode.revision ................................................................................................................. 8-146

localnode.serialno ................................................................................................................. 8-147

localnode.showerrors ............................................................................................................ 8-147

makegetter() .......................................................................................................................... 8-148

makesetter() .......................................................................................................................... 8-149

meminfo() .............................................................................................................................. 8-149

node[N].execute() .................................................................................................................. 8-150

node[N].getglobal() ................................................................................................................ 8-151

node[N].setglobal() ................................................................................................................ 8-152

opc() ...................................................................................................................................... 8-152

os.remove() ........................................................................................................................... 8-153

os.rename() ........................................................................................................................... 8-154

os.time() ................................................................................................................................ 8-154

print() ..................................................................................................................................... 8-155

printbuffer()............................................................................................................................ 8-156

printnumber() ......................................................................................................................... 8-157

reset() .................................................................................................................................... 8-158

savebuffer() ........................................................................................................................... 8-159

script.anonymous .................................................................................................................. 8-159

script.delete() ........................................................................................................................ 8-160

script.factory.catalog() ........................................................................................................... 8-161

script.load() ........................................................................................................................... 8-161

script.new()............................................................................................................................ 8-162

script.newautorun() ............................................................................................................... 8-163

script.restore() ....................................................................................................................... 8-164

script.run() ............................................................................................................................. 8-165

script.user.catalog() ............................................................................................................... 8-165

scriptVar.autorun ................................................................................................................... 8-166

scriptVar.list() ........................................................................................................................ 8-167

scriptVar.name ...................................................................................................................... 8-167

scriptVar.run() ....................................................................................................................... 8-168

Table of contents Model 2601B-PULSE System SourceMeter® Instrument Reference Manual

scriptVar.save() ..................................................................................................................... 8-169

scriptVar.source .................................................................................................................... 8-170

serial.baud............................................................................................................................. 8-170

serial.databits ........................................................................................................................ 8-171

serial.flowcontrol ................................................................................................................... 8-172

serial.parity ............................................................................................................................ 8-173

serial.read() ........................................................................................................................... 8-174

serial.write() ........................................................................................................................... 8-175

settime() ................................................................................................................................ 8-175

settimezone() ........................................................................................................................ 8-176

setup.poweron ....................................................................................................................... 8-177

setup.recall() ......................................................................................................................... 8-178

setup.save() .......................................................................................................................... 8-179

smua.abort() .......................................................................................................................... 8-180

smua.buffer.getstats() ........................................................................................................... 8-180

smua.buffer.recalculatestats() ............................................................................................... 8-182

smua.cal.adjustdate .............................................................................................................. 8-182

smua.cal.date ........................................................................................................................ 8-183

smua.cal.due ......................................................................................................................... 8-184

smua.cal.lock() ...................................................................................................................... 8-185

smua.cal.password ............................................................................................................... 8-186

smua.cal.polarity ................................................................................................................... 8-186

smua.cal.restore() ................................................................................................................. 8-187

smua.cal.save() ..................................................................................................................... 8-188

smua.cal.state ....................................................................................................................... 8-189

smua.cal.unlock() .................................................................................................................. 8-190

smua.contact.calibratehi() ..................................................................................................... 8-190

smua.contact.calibratelo() ..................................................................................................... 8-192

smua.contact.check() ............................................................................................................ 8-193

smua.contact.r() .................................................................................................................... 8-194

smua.contact.speed ................................................................ .............................................. 8-195

smua.contact.threshold ......................................................................................................... 8-196

smua.interlock.enable ........................................................................................................... 8-197

smua.makebuffer() ................................................................................................................ 8-197

smua.measure.autorangeY ................................................................................................... 8-198

smua.measure.autozero ....................................................................................................... 8-199

smua.measure.calibrateY() ................................................................................................... 8-200

smua.measure.count ............................................................................................................. 8-201

smua.measure.delay ............................................................................................................. 8-202

smua.measure.delayfactor .................................................................................................... 8-203

smua.measure.filter.count ..................................................................................................... 8-203

smua.measure.filter.enable ................................................................................................... 8-204

smua.measure.filter.type ....................................................................................................... 8-205

smua.measure.highcrangedelayfactor .................................................................................. 8-206

smua.measure.interval .......................................................................................................... 8-206

smua.measure.lowrangeY..................................................................................................... 8-207

smua.measure.nplc ............................................................................................................... 8-208

smua.measure.overlappedY() ............................................................................................... 8-209

smua.measure.rangeY .......................................................................................................... 8-210

smua.measure.rel.enableY ................................................................................................... 8-211

smua.measure.rel.levelY ....................................................................................................... 8-212

smua.measure.Y() ................................................................................................................. 8-213

smua.measureYandstep() ..................................................................................................... 8-214

smua.nvbufferY ..................................................................................................................... 8-215

smua.pulser.enable ............................................................................................................... 8-216

smua.pulser.measure.aperture ............................................................................................. 8-217

smua.pulser.measure.calibrateY() ........................................................................................ 8-218

smua.pulser.measure.delay .................................................................................................. 8-219

smua.pulser.protect.sensev .................................................................................................. 8-220

smua.pulser.protect.sourcev ................................................................................................. 8-221

smua.pulser.protect.tripped ................................................................ ................................... 8-222

Model 2601B-PULSE System SourceMeter® Instrument Reference Manual Table of contents

smua.pulser.source.calibratebiasi() ....................................................................................... 8-223

smua.pulser.rangeY .............................................................................................................. 8-224

smua.pulser.source.calibratei() ............................................................................................. 8-225

smua.reset() .......................................................................................................................... 8-226

smua.savebuffer() ................................................................................................................. 8-226

smua.sense ........................................................................................................................... 8-227

smua.source.autorangeY ...................................................................................................... 8-228

smua.source.calibrateY() ...................................................................................................... 8-229

smua.source.compliance ...................................................................................................... 8-230

smua.source.delay ................................................................................................ ................ 8-230

smua.source.func .................................................................................................................. 8-231

smua.source.highc ................................................................................................ ................ 8-232

smua.source.levelY ............................................................................................................... 8-233

smua.source.limitY ................................................................................................................ 8-234

smua.source.lowrangeY ........................................................................................................ 8-235

smua.source.offfunc .............................................................................................................. 8-235

smua.source.offlimitY ............................................................................................................ 8-236

smua.source.offmode ............................................................................................................ 8-237

smua.source.output ............................................................................................................... 8-238

smua.source.rangeY ............................................................................................................. 8-239

smua.source.settling ............................................................................................................. 8-240

smua.source.sink .................................................................................................................. 8-241

smua.trigger.arm.count ......................................................................................................... 8-241

smua.trigger.arm.set() ........................................................................................................... 8-242

smua.trigger.arm.stimulus ..................................................................................................... 8-242

smua.trigger.ARMED_EVENT_ID ......................................................................................... 8-244

smua.trigger.autoclear .......................................................................................................... 8-244

smua.trigger.count ................................................................................................................ 8-245

smua.trigger.endpulse.action ................................................................................................ 8-247

smua.trigger.endpulse.set()................................................................................................... 8-247

smua.trigger.endpulse.stimulus............................................................................................. 8-249

smua.trigger.endsweep.action .............................................................................................. 8-250

smua.trigger.IDLE_EVENT_ID .............................................................................................. 8-251

smua.trigger.initiate() ............................................................................................................ 8-251

smua.trigger.measure.action ................................................................................................. 8-252

smua.trigger.measure.set() ................................................................................................... 8-254

smua.trigger.measure.stimulus ............................................................................................. 8-254

smua.trigger.measure.Y()...................................................................................................... 8-256

smua.trigger.MEASURE_COMPLETE_EVENT_ID .............................................................. 8-257

smua.trigger.PULSE_COMPLETE_EVENT_ID .................................................................... 8-257

smua.trigger.source.action .................................................................................................... 8-258

smua.trigger.source.limitY ..................................................................................................... 8-259

smua.trigger.source.linearY() ................................................................................................ 8-260

smua.trigger.source.listY() .................................................................................................... 8-261

smua.trigger.source.logY() .................................................................................................... 8-262

smua.trigger.source.pulsewidth ............................................................................................. 8-263

smua.trigger.source.set() ...................................................................................................... 8-264

smua.trigger.source.stimulus ................................................................................................ 8-264

smua.trigger.SOURCE_COMPLETE_EVENT_ID ................................................................. 8-266

smua.trigger.SWEEP_COMPLETE_EVENT_ID ................................................................... 8-266

smua.trigger.SWEEPING_EVENT_ID .................................................................................. 8-267

status.condition ..................................................................................................................... 8-268

status.measurement.* ........................................................................................................... 8-270

status.measurement.buffer_available.* ................................................................................. 8-272

status.measurement.current_limit.* ....................................................................................... 8-273

status.measurement.instrument.* .......................................................................................... 8-274

status.measurement.instrument.smua.* ................................................................................ 8-276

status.measurement.protection.* ........................................................................................... 8-278

status.measurement.reading_overflow.* ............................................................................... 8-279

status.measurement.voltage_limit.* ...................................................................................... 8-280

status.node_enable ............................................................................................................... 8-282

Table of contents Model 2601B-PULSE System SourceMeter® Instrument Reference Manual

status.node_event ................................................................................................................. 8-284

status.operation.* .................................................................................................................. 8-285

status.operation.calibrating.* ................................................................................................. 8-288

status.operation.instrument.*................................................................................................. 8-289

status.operation.instrument.digio.* ........................................................................................ 8-291

status.operation.instrument.digio.trigger_overrun.* ............................................................... 8-292

status.operation.instrument.lan.* ........................................................................................... 8-295

status.operation.instrument.lan.trigger_overrun.* .................................................................. 8-297

status.operation.instrument.smua.* ....................................................................................... 8-299

status.operation.instrument.smua.trigger_overrrun.* ............................................................ 8-301

status.operation.instrument.trigger_blender.*........................................................................ 8-303

status.operation.instrument.trigger_blender.trigger_overrun.* .............................................. 8-304

status.operation.instrument.trigger_timer.* ........................................................................... 8-306

status.operation.instrument.trigger_timer.trigger_overrun.* .................................................. 8-307

status.operation.instrument.tsplink.* ..................................................................................... 8-310

status.operation.instrument.tsplink.trigger_overrun.* ............................................................ 8-311

status.operation.measuring.*................................................................................................. 8-313

status.operation.remote.* ...................................................................................................... 8-314

status.operation.sweeping.* .................................................................................................. 8-315

status.operation.trigger_overrun.* ......................................................................................... 8-317

status.operation.user.* .......................................................................................................... 8-319

status.questionable.* ............................................................................................................. 8-321

status.questionable.calibration.* ............................................................................................ 8-323

status.questionable.instrument.* ........................................................................................... 8-325

status.questionable.instrument.smua.* ................................................................................. 8-326

status.questionable.over_temperature.* ................................................................................ 8-328

status.questionable.unstable_output.* .................................................................................. 8-329

status.request_enable ........................................................................................................... 8-330

status.request_event ............................................................................................................. 8-332

status.reset() ......................................................................................................................... 8-334

status.standard.* ................................................................................................................... 8-334

status.system.* ...................................................................................................................... 8-336

status.system2.* .................................................................................................................... 8-339

status.system3.* .................................................................................................................... 8-341

status.system4.* .................................................................................................................... 8-343

status.system5.* .................................................................................................................... 8-345

SweepILinMeasureV() ........................................................................................................... 8-347

SweepIListMeasureV() .......................................................................................................... 8-348

SweepILogMeasureV() ......................................................................................................... 8-349

SweepVLinMeasureI() ........................................................................................................... 8-350

SweepVListMeasureI() .......................................................................................................... 8-352

SweepVLogMeasureI() ......................................................................................................... 8-353

timer.measure.t() ................................................................................................................... 8-354

timer.reset() ........................................................................................................................... 8-355

trigger.blender[N].clear() ....................................................................................................... 8-356

trigger.blender[N].EVENT_ID ................................................................................................ 8-356

trigger.blender[N].orenable.................................................................................................... 8-357

trigger.blender[N].overrun ..................................................................................................... 8-357

trigger.blender[N].reset() ....................................................................................................... 8-358

trigger.blender[N].stimulus[M] ............................................................................................... 8-359

trigger.blender[N].wait() ......................................................................................................... 8-360

trigger.clear() ......................................................................................................................... 8-361

trigger.EVENT_ID ................................................................................................................. 8-361

trigger.generator[N].assert() .................................................................................................. 8-362

trigger.generator[N].EVENT_ID ............................................................................................. 8-362

trigger.timer[N].clear() ........................................................................................................... 8-363

trigger.timer[N].count ............................................................................................................. 8-363

trigger.timer[N].delay ............................................................................................................. 8-364

trigger.timer[N].delaylist ........................................................................................................ 8-365

trigger.timer[N].EVENT_ID .................................................................................................... 8-366

trigger.timer[N].overrun ......................................................................................................... 8-366

Model 2601B-PULSE System SourceMeter® Instrument Reference Manual Table of contents

trigger.timer[N].passthrough .................................................................................................. 8-367

trigger.timer[N].reset() ........................................................................................................... 8-367

trigger.timer[N].stimulus ........................................................................................................ 8-368

trigger.timer[N].wait() ............................................................................................................. 8-370

trigger.wait() .......................................................................................................................... 8-370

tsplink.group .......................................................................................................................... 8-371

tsplink.master ........................................................................................................................ 8-372

tsplink.node ........................................................................................................................... 8-372

tsplink.readbit() ...................................................................................................................... 8-373

tsplink.readport() ................................................................................................................... 8-373

tsplink.reset() ......................................................................................................................... 8-374

tsplink.state ........................................................................................................................... 8-375

tsplink.trigger[N].assert() ....................................................................................................... 8-375

tsplink.trigger[N].clear() ......................................................................................................... 8-376

tsplink.trigger[N].EVENT_ID .................................................................................................. 8-377

tsplink.trigger[N].mode .......................................................................................................... 8-377

tsplink.trigger[N].overrun ....................................................................................................... 8-379

tsplink.trigger[N].pulsewidth .................................................................................................. 8-379

tsplink.trigger[N].release() ..................................................................................................... 8-380

tsplink.trigger[N].reset() ......................................................................................................... 8-381

tsplink.trigger[N].stimulus ...................................................................................................... 8-381

tsplink.trigger[N].wait() .......................................................................................................... 8-383

tsplink.writebit() ..................................................................................................................... 8-383

tsplink.writeport() ................................................................................................................... 8-384

tsplink.writeprotect ................................................................................................................ 8-385

tspnet.clear() ......................................................................................................................... 8-385

tspnet.connect() .................................................................................................................... 8-386

tspnet.disconnect() ................................................................................................................ 8-387

tspnet.execute() .................................................................................................................... 8-388

tspnet.idn() ............................................................................................................................ 8-389

tspnet.read() .......................................................................................................................... 8-390

tspnet.readavailable() ............................................................................................................ 8-391

tspnet.reset() ......................................................................................................................... 8-391

tspnet.termination() ............................................................................................................... 8-392

tspnet.timeout ........................................................................................................................ 8-393

tspnet.tsp.abort() ................................................................................................................... 8-393

tspnet.tsp.abortonconnect ..................................................................................................... 8-394

tspnet.tsp.rbtablecopy() ......................................................................................................... 8-395

tspnet.tsp.runscript() ............................................................................................................. 8-396

tspnet.write() ......................................................................................................................... 8-397

userstring.add() ..................................................................................................................... 8-397

userstring.catalog() ............................................................................................................... 8-398

userstring.delete() ................................................................................................................. 8-399

userstring.get() ...................................................................................................................... 8-400

waitcomplete() ....................................................................................................................... 8-400

Troubleshooting guide ............................................................................................ 9-1

Introduction .......................................................................................................................... 9-1

Error levels ........................................................................................................................... 9-1

Effects of errors on scripts ................................................................................................... 9-1

Retrieving errors ................................................................................................................... 9-2

Error summary list ................................................................................................................ 9-2

Calibration .............................................................................................................. 10-1

Calibration .......................................................................................................................... 10-1

Table of contents Model 2601B-PULSE System SourceMeter® Instrument Reference Manual

Calibration test requirements .................................................................................................. 10-2

Uninstalling the 2601B-P-INT .................................................................................................. 10-5

Restoring factory defaults........................................................................................................ 10-6

Performing the calibration test procedures .............................................................................. 10-6

Current source accuracy ......................................................................................................... 10-8

Current measurement accuracy ............................................................................................ 10-10

Voltage source accuracy ....................................................................................................... 10-13

Voltage measurement accuracy ............................................................................................ 10-14

Pulse accuracy ...................................................................................................................... 10-15

Bias source accuracy ............................................................................................................ 10-19

Adjustment ....................................................................................................................... 10-20

Environmental conditions ...................................................................................................... 10-21

Adjustment considerations .................................................................................................... 10-21

Adjustment overview ............................................................................................................. 10-23

Calibration and adjustment commands quick reference ........................................................ 10-25

Adjustment procedure ........................................................................................................... 10-27

Common commands .............................................................................................. 11-1

Common command summary ............................................................................................ 11-1

Script command equivalents .............................................................................................. 11-3

Command reference .......................................................................................................... 11-3

Identification query: *IDN?....................................................................................................... 11-3

Operation complete and query: *OPC and *OPC? .................................................................. 11-4

Reset: *RST ............................................................................................................................ 11-4

Self-test query: *TST? ............................................................................................................. 11-4

Trigger: *TRG .......................................................................................................................... 11-4

Wait-to-continue: *WAI ............................................................................................................ 11-5

General bus commands ..................................................................................................... 11-5

REN ........................................................................................................................................ 11-5

IFC .......................................................................................................................................... 11-6

LLO ......................................................................................................................................... 11-6

GTL ......................................................................................................................................... 11-6

DCL ......................................................................................................................................... 11-6

SDC ........................................................................................................................................ 11-7

GET ......................................................................................................................................... 11-7

SPE, SPD................................................................................................................................ 11-7

Status model .......................................................................................................... 12-1

Overview ............................................................................................................................ 12-1

Status register set contents ................................................................ ................................ ..... 12-1

Queues ................................................................................................................................... 12-2

Status function summary ......................................................................................................... 12-3

Status model diagrams ........................................................................................................... 12-5

Clearing registers ............................................................................................................. 12-13

Programming enable and transition registers .................................................................. 12-14

Reading registers ............................................................................................................. 12-15

Status byte and service request (SRQ) ........................................................................... 12-15

Status Byte Register ............................................................................................................. 12-16

Service Request Enable Register ......................................................................................... 12-17

Serial polling and SRQ .......................................................................................................... 12-18

SPE, SPD (serial polling) ...................................................................................................... 12-18

Status byte and service request commands.......................................................................... 12-19

Model 2601B-PULSE System SourceMeter® Instrument Reference Manual Table of contents

Enable and transition registers .............................................................................................. 12-19

Controlling node and SRQ enable registers .......................................................................... 12-19

Status register sets .......................................................................................................... 12-20

System Summary Registers .................................................................................................. 12-20

Standard Event Register ....................................................................................................... 12-21

Operation Status Registers ................................................................................................... 12-22

Questionable Status Registers .............................................................................................. 12-23

Measurement Event Registers .............................................................................................. 12-24

Register programming example ............................................................................................ 12-25

TSP-Link system status ................................................................................................... 12-25

Status model configuration example ..................................................................................... 12-25

Display character codes ........................................................................................ 13-1

2601B-PULSE display character codes ............................................................................. 13-1

Frequently asked questions .................................................................................. 14-1

How do I display the instrument's serial number? ............................................................. 14-1

How do I optimize performance? ....................................................................................... 14-1

Disabling autozero to increase speed ..................................................................................... 14-2

How do I use the digital I/O port? ....................................................................................... 14-2

How do I trigger other instruments? ................................................................................... 14-2

Triggering a scanner ............................................................................................................... 14-3

Interactive trigger programming .............................................................................................. 14-3

More information about triggering ........................................................................................... 14-3

How do I generate a GPIB service request?...................................................................... 14-3

Setting up a service request .................................................................................................... 14-4

Service request programming example ................................................................................... 14-4

Polling for SRQs ...................................................................................................................... 14-4

How do I store measurements in nonvolatile memory? ..................................................... 14-4

When should I change the output-off state? ...................................................................... 14-5

How do I make contact check measurements? ................................................................. 14-5

How can I change the line frequency or voltage? .............................................................. 14-6

Where can I get the LabVIEW driver? ............................................................................... 14-6

What should I do if I get an 802 interlock error? ................................................................ 14-6

Why is the reading value 9.91e37? .................................................................................... 14-6

Next steps ............................................................................................................... 15-1

Additional 2601B-PULSE information ................................................................................ 15-1

In this section:

Welcome .................................................................................. 1-1

Extended warranty ................................................................... 1-1

Contact information ................................ .................................. 1-1

Customer documentation ......................................................... 1-2

Product software and drivers.................................................... 1-2

Capabilities and features .......................................................... 1-3

Welcome

Thank you for choosing a Keithley Instruments product. The 2601B-PULSE System SourceMeter®
10 μs Pulser/SMU Instrument with PulseMeter™ technology is an industry-leading high current/high
speed pulser with measure capabilities and the full functionality of a traditional source-measure
instrument (SMU). This instrument offers 10 A current pulse output at 10 V with a minimum pulse
width of 10 μs. Its built-in dual 1 megasample/second (MS/s), 18-bit digitizers make it possible to
acquire both pulse current and voltage waveforms simultaneously without the need to use a
separate instrument.

Extended warranty

Additional years of warranty coverage are available on many products. These valuable contracts
protect you from unbudgeted service expenses and provide additional years of protection at a fraction
of the price of a repair. Extended warranties are available on new and existing products. Contact your
local Keithley Instruments office, sales partner, or distributor for details.

Contact information

If you have any questions after you review the information in this documentation, please contact your
local Keithley Instruments office, sales partner, or distributor. You can also call the Tektronix
corporate headquarters (toll-free inside the U.S. and Canada only) at 1-800-833-9200. For worldwide
contact numbers, visit tek.com/contact-us.

Section 1

Introduction

Section 1: Introduction Model 2601B-PULSE System SourceMeter® Instrument Reference Manual

1-2 2601B-PULSE-901-01 Rev. B November 2021

Customer documentation

The documentation for the 2601B-PULSE includes a Quick Start Guide, User's Manual (this
document), and Reference Manual. The 2601B-PULSE Quick Start Guide is provided as a hard copy
with the instrument. You can also access it from tek.com/keithley as an Adobe Acrobat PDF file.

The documents include the following information:

• Quick Start Guide: Provides unpacking instructions, describes basic connections, and reviews

basic operation information. If you are new to Keithley Instruments equipment, refer to the Quick
Start Guide to take the steps needed to unpack, set up, and verify operation.

• User's Manual: Includes installation, instrument description, operation, and maintenance

information.

• Reference Manual: Includes advanced operation information. Programmers looking for a

command reference and users looking for an in-depth description of how the instrument works
(including troubleshooting and optimization) should refer to the Reference Manual.

Product software and drivers

Go to the Product Support and Downloads web page (tek.com/product-support) to download drivers
and software for your instrument.

Available drivers and software include:

• KickStart Software: Enables quick test setup and data visualization when using one or

more instruments.

• Test Script Builder (TSB): This software provides an environment to develop a test program and

the ability to load the test program onto the instrument. Running a program loaded on the
instrument eliminates the need to send individual commands from the host computer to the
instrument when running a test.

• IVI-COM Driver: An IVI instrument driver you can use to create your own test applications in

C/C++, VB.NET, or C# programming languages. It can also be called from other languages that
support calling a DLL or ActiveX (COM) object. Refer to IVI Foundation (ivifoundation.org) for
additional information.

• LabVIEW

™

Software drivers: Drivers to communicate with National Instruments

LabVIEW Software.

• Keithley I/O layer: Manages the communications between Keithley instrument drivers and

software applications and the instrument itself. The I/O Layer handles differences in
communications required to support GPIB, serial, ethernet, and other communications buses so
that drivers and software applications do not need to handle the differences themselves.

Model 2601B-PULSE System SourceMeter® Instrument Reference Manual Section 1: Introduction

2601B-PULSE-901-01 Rev. B November 2021 1-3

To identify IP addresses of instruments that are connected to the local area network (LAN) and
support the VXI-11 discovery protocol, you can also use LXI Discovery Tool, available from the

Resources (lxistandard.org/Resources/Resources.aspx) page of the LXI Consortium website

(lxistandard.org).

Capabilities and features

Key features:

• Pulser output of 10 A at 10 V

• Source-measure unit (SMU) output of 10 A at 20 V

• No tuning required; works with inductive loads up to 3 μH

• Pulser has dual 1 megasample/second digitizers for simultaneous high-speed sampling of current

and voltage

• SMU has dual integrating analog-to-digital converters for simultaneous measurement of current

and voltage

• DC capability up to ±40 V at ±1.0 A, 40 W

• TSP technology embeds complete test programs inside the instrument for best-in-class

system-level throughput

• TSP-Link expansion technology for multi-channel parallel test without a mainframe

• USB 2.0, ethernet, GPIB, RS-232, and digital I/O interfaces

• Supported in the Keithley KickStart Software.

Section 1: Introduction Model 2601B-PULSE System SourceMeter® Instrument Reference Manual

1-4 2601B-PULSE-901-01 Rev. B November 2021

General features:

• 4.5, 5.5, or 6.5 digit display resolution

• Resistance and power measurement functions

• Four-quadrant sink or source operation

• Linear, logarithmic, and custom sweeping

• Filtering to reduce reading noise

• Trigger model supports extensive triggering and synchronization schemes at hardware speeds

• The SMU provides contact check

• The SMU provides high-capacitance mode for load impedances up to 50 µF

• Internal memory stores five user setup options

• Dedicated reading buffers that can each store and recall over 140,000 measurements; additional

dynamic reading buffers can be created

• USB flash drive access for saving data buffers, test scripts, and user setups

• Digital I/O port: Allows the 2601B-PULSE to control other devices

• Version 1.5 LXI Device Specification 2016 compliant

In this section:

Basic source-measure procedure ............................................ 2-1

Combining SMU outputs .......................................................... 2-5

Output-off modes ................................................................... 2-16

Saved setups ......................................................................... 2-17

Operation considerations for the ADC .................................... 2-20

Triggering in local mode ......................................................... 2-21

Configuring trigger attributes in local mode ............................ 2-22

Configuring for measure-only tests using the MODE key ....... 2-23

Voltmeter and ammeter measurements ................................. 2-24

Ohms measurements ............................................................. 2-25

Power measurements ............................................................ 2-28

Range .................................................................................... 2-30

Digits ...................................................................................... 2-36

Speed when the pulser is disabled ......................................... 2-37

Sweep operation .................................................................... 2-38

Relative offset ........................................................................ 2-52

Filters ..................................................................................... 2-53

High-capacitance mode ......................................................... 2-57

Basic source-measure procedure

You can perform basic source-measure operations from the front panel of the instrument, which is
shown in the following figure.

Figure 1: Model 2601B-PULSE front panel

Section 2

Sourcing and measuring

Section 2: Sourcing and measuring Model 2601B-PULSE System SourceMeter® Instrument Reference Manual

2-2 2601B-PULSE-901-01 Rev. B November 2021

Front-panel source-measure procedure

Use the following procedure to perform the basic source-measure operations of the 2601B-PULSE
SMU using the front panel. The following procedure assumes that the 2601B-PULSE is already

connected to the device under test (DUT), as explained in “DUT test connections” in the

Model 2601B-PULSE User's Manual.

Hazardous voltages may be present on all output and guard terminals. To prevent electrical
shock that could cause injury or death, never make or break connections to the 2601B-PULSE
while the instrument is powered on. Turn off the equipment from the front panel or
disconnect the main power cord from the rear of the 2601B-PULSE before handling cables.
Putting the equipment into standby does not guarantee that the outputs are powered off if a
hardware or software fault occurs.

Step 1: Select and set the source level

To select the source and edit the source value:

1. Press the SRC key as needed to select the voltage source or current source, as indicated by the
units in the source field on the display. The flashing digit (cursor) indicates which value is
presently selected for editing.

2. Move the cursor to the digit to change, then press the navigation wheel to enter the EDIT mode.

3. Use the RANGE keys to select a range that accommodates the value you want to set. For best
accuracy, use the lowest possible source range.

4. Enter the source value.

5. Press the ENTER key or the navigation wheel to complete editing.

Step 2: Set the compliance limit

Perform the following steps to edit the compliance limit value:

1. Press the LIMIT key.

2. Move the cursor to the digit to change, then press the navigation wheel to enter the EDIT mode,
as indicated by the EDIT indicator.

3. Enter the limit value, then press the ENTER key or the navigation wheel to complete editing.

Model 2601B-PULSE System SourceMeter® Instrument Reference Manual Section 2: Sourcing and measuring

2601B-PULSE-901-01 Rev. B November 2021 2-3

Step 3: Select the measurement function and range

Select measurement function and range as follows:

1. Select the measurement function by pressing the MEAS key.

2. Set the measurement range with the RANGE keys, or enable AUTO range. When setting the
range, consider the following points:

▪ When measuring the source (such as when sourcing V and measuring V), you cannot select

the measurement range using the RANGE keys. The selected source range determines the
measurement range.

▪ When not measuring the source (such as when sourcing V but measuring I), you can select

the measurement range selection manually or the instrument can set it automatically. When
using manual ranging, use the lowest possible range for best accuracy. When autorange is
enabled, the 2601B-PULSE automatically goes to the most sensitive range to make
the measurement.

Step 4: Turn the output on

Turn on the output by pressing the OUTPUT ON/OFF switch. The OUTPUT indicator light turns on.

Step 5: Observe readings on the display.

Press the TRIG key if necessary to trigger the instrument to begin making readings. The readings are
on the top line, and source and limit values are on the bottom line.

Step 6: Turn the output off

When finished, turn the output off by pressing the OUTPUT ON/OFF switch. The OUTPUT indicator
light turns off.

Section 2: Sourcing and measuring Model 2601B-PULSE System SourceMeter® Instrument Reference Manual

2-4 2601B-PULSE-901-01 Rev. B November 2021

Remote source-measure commands

Basic source-measurement procedures can also be performed through a remote interface. To do this,
send the appropriate commands. The following table summarizes basic source-measure commands.
See Introduction to TSP operation (on page 6-1) for more information on using these commands.
Some source-measure commands are not available when the pulser is enabled. Refer to Settings

ignored when the pulser is enabled (on page 8-3) for information on those commands.

Basic source-measure commands

Command

Description

smua.measure.autorangei = smua.AUTORANGE_ON

Enable current measure autorange

smua.measure.autorangev = smua.AUTORANGE_ON

Enable voltage measure autorange

smua.measure.autorangei = smua.AUTORANGE_OFF

Disable current measure autorange

smua.measure.autorangev = smua.AUTORANGE_OFF

Disable voltage measure autorange

smua.measure.rangei = rangeval

Set current measure range

smua.measure.rangev = rangeval

Set voltage measure range

reading = smua.measure.i()

Request a current reading

reading = smua.measure.v()

Request a voltage reading

iReading, vReading = smua.measure.iv()

Request a current and voltage reading

reading = smua.measure.r()

Request a resistance reading

reading = smua.measure.p()

Request a power reading

smua.source.autorangei = smua.AUTORANGE_ON

Enable current source autorange

smua.source.autorangev = smua.AUTORANGE_ON

Enable voltage source autorange

smua.source.autorangei = smua.AUTORANGE_OFF

Disable current source autorange

smua.source.autorangev = smua.AUTORANGE_OFF

Disable voltage source autorange

smua.source.func = smua.OUTPUT_DCVOLTS

Select voltage source function

smua.source.func = smua.OUTPUT_DCAMPS

Select current source function

smua.source.leveli = sourceval

Set current source value

smua.source.levelv = sourceval

Set voltage source value

smua.source.limiti = level

Set current limit

smua.source.limitv = level

Set voltage limit

smua.source.limitp = level

Set power limit

smua.source.output = smua.OUTPUT_ON

Turn on source output

smua.source.output = smua.OUTPUT_OFF

Turn off source output

smua.source.rangei = rangeval

Set current source range

smua.source.rangev = rangeval

Set voltage source range

smua.sense = smua.SENSE_LOCAL

Select local sense (2-wire)

smua.sense = smua.SENSE_REMOTE

Select remote sense (4-wire)

Requesting readings

You can request readings by including the appropriate measurement command as the argument for
the print() command. The following programming example illustrates how to request a
current reading:

print(smua.measure.i())

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2601B-PULSE-901-01 Rev. B November 2021 2-5

Source-measure programming example

The following SMU programming example illustrates the setup and command sequence of a basic
source-measure procedure with the following parameters:

• Source function and range: Voltage, autorange

• Source output level: 5 V

• Current compliance limit: 10 mA

• Measure function and range: Current, 10 mA

-- Restore 2601B-PULSE defaults. This disables the pulser.

smua.reset()

-- Select voltage source function.

smua.source.func = smua.OUTPUT_DCVOLTS

-- Set source range to auto.

smua.source.autorangev = smua.AUTORANGE_ON

-- Set voltage source to 5 V.

smua.source.levelv = 5

-- Set current limit to 10 mA.

smua.source.limiti = 10e-3

-- Set current range to 10 mA.

smua.measure.rangei = 10 e-3

-- Turn on output.

smua.source.output = smua.OUTPUT_ON

-- Print and place the current reading in the reading buffer.

print(smua.measure.i(smua.nvbuffer1))

-- Turn off output.

smua.source.output = smua.OUTPUT_OFF

Combining SMU outputs

The following information provides important considerations that need to be observed when
combining SMU outputs.

Use care when combining SMUs. Whenever SMUs are combined, it is best to use instruments with
identical current and voltage envelopes and ranges.

Carefully consider and configure the appropriate output-off state, source function, and
compliance limits before connecting the 2601B-PULSE to a device that can deliver energy (for
example, other voltage sources, batteries, capacitors, solar cells, or other 2601B-PULSE
instruments). Configure recommended instrument settings before making connections to the
device. Failure to consider the output-off state, source, and compliance limits may result in
damage to the instrument or to the device under test (DUT).

Section 2: Sourcing and measuring Model 2601B-PULSE System SourceMeter® Instrument Reference Manual

2-6 2601B-PULSE-901-01 Rev. B November 2021

The following figure and table illustrate the pulse regions for each SMU when used in combination
with another SMU. The programmed current and voltage levels for both SMUs must fall within the
same pulse region. Refer to the 2601B-PULSE specifications on tek.com/keithley for the latest pulse
width and duty cycle information. Measurements are given priority over source and display operations,
so make sure that the measurement time does not exceed the allowable pulse width and duty cycle in
a particular pulse region.

Figure 2: Pulse regions

Pulse region specification (pulser disabled)

Region (quadrant diagram)

Region maximum

Maximum pulse width

Maximum duty cycle

1

1 A at 40 V

DC, no limit

100%

1

3 A at 6 V

DC, no limit

100%

2

1.5 A at 40 V

100 ms

25%

3

5 A at 35 V

4 ms

4% 4 10 A at 20 V

1.8 ms

1% 5 5 A at 6 V

10 ms

10%