Keithley 707B User manual

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Models 707B and 708B
Switching Matrix
User’s Manual
707B-900-01 Rev. A / August 2010
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com

Models 707B and 708B
Switching Matrix
User's Manual
© 2010, Keithley Instruments, Inc.
Cleveland, Ohio, U.S.A.
All rights reserved.
Any unauthorized reproduction, photocopy, or use the information herein, in whole or in part,
without the prior written approval of Keithley Instruments, Inc. is strictly prohibited.
All Keithley Instruments product names are trademarks or registered trademarks of Keithley
Instruments, Inc. Other brand names are trademarks or registered trademarks of their respective
holders.
Document number: 707B-900-01 Rev. A / August 2010

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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 non-hazardous voltages, there are situations where hazardous
conditions may be present.
This product is intended for use by qualified 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 Instruments products are designed for use with electrical signals that are rated Measurement Category I and
Measurement Category II, as described in the International Electrotechnical Commission (IEC) Standard IEC 60664. Most
measurement, control, and data I/O signals are Measurement Category I and must not be directly connected to mains voltage or
to voltage sources with high transient over-voltages. Measurement Category II connections require protection for high transient
over-voltages often associated with local AC mains connections. Assume all measurement, control, and data I/O connections are
for connection to Category I sources unless otherwise marked or described in the user documentation.
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
30V RMS, 42.4V peak, or 60VDC 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 1000V, 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.
The instrument and accessories must be used in accordance with its specifications and operating instructions, or the safety of
the equipment may be impaired.

11/07
Do not exceed the maximum signal levels of the instruments and accessories, as defined in the specifications and operating
information, and as shown on the instrument or test fixture panels, or switching card.
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 safety earth 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 safety earth ground using the wire recommended in the user documentation.
The symbol on an instrument means caution, risk of danger. The user should 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 caution, risk of danger. 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 dangers 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.
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 Instruments. Standard fuses with applicable national safety
approvals may be used if the rating and type are the same. 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 Instruments to maintain accuracy and functionality of the product). If you are unsure about the applicability of a
replacement component, call a Keithley Instruments office for information.
To clean an instrument, use a damp cloth 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.

Table of Contents
Introduction ................................................................................................................. 1-1
Introduction to this manual................................................................................................... 1-1
Models 707B and 708B applications.................................................................................... 1-1
CD-ROM contents................................................................................................................ 1-2
Using the front-panel interface.................................................................................. 2-1
Introduction .......................................................................................................................... 2-1
Model 707B front panel........................................................................................................ 2-2
Model 708B front panel........................................................................................................ 2-2
Keys and navigation wheel .................................................................................................. 2-3
Navigation wheel....................................................................................................................... 2-3
Front-panel keys ....................................................................................................................... 2-4
Display.................................................................................................................................. 2-5
Channel identification................................................................................................................ 2-6
Selecting and closing a channel from the front panel .......................................................... 2-7
Exercise: Select and close slot 1, row C, column 7 crosspoint.................................................. 2-8
Crosspoint display (Model 707B only) ................................................................................. 2-9
Selecting and closing channels using the crosspoint display .................................................. 2-10
Viewing the close or open status of a channel .................................................................. 2-11
Channel patterns................................................................................................................2-11
Create a channel pattern......................................................................................................... 2-12
Performing close and open operations on channel patterns ................................................... 2-12
Set up row, column, and channel labels ............................................................................ 2-13
Exercise: Create a row label for row D using the front panel .................................................. 2-14
Using the web interface.............................................................................................. 3-1
Introduction .......................................................................................................................... 3-1
Connect to the instrument web interface ............................................................................. 3-1
Web interface home page.................................................................................................... 3-2
Log in to the instrument........................................................................................................3-2
Card pages........................................................................................................................... 3-3
Open and close channels from the card pages ......................................................................... 3-4
Set up channel patterns from the web interface........................................................................ 3-6
Scan Builder page................................................................................................................ 3-8
Create a scan list ...................................................................................................................... 3-9
Run the scan ............................................................................................................................. 3-9
Stop the scan .......................................................................................................................... 3-10
Clear the scan list from the web interface ............................................................................... 3-10
Set up simple triggers ............................................................................................................. 3-10

Table of Contents Models 707B and 708B Switching Matrix User's Manual
ii 707B-900-01 Rev. A / August 2010
TSB Embedded.................................................................................................................. 3-11
Create a script using TSB Embedded ..................................................................................... 3-11
Working with the Model 4200-SCS ............................................................................ 4-1
Introduction .......................................................................................................................... 4-1
Equipment required to run the example............................................................................... 4-1
Configure Model 707B or 708B for Model 4200-SCS.......................................................... 4-1
Add Model 707B or 708B to Model 4200-SCS .................................................................... 4-2
Next steps ............................................................................................................................ 4-3
Working with the Series 2600A.................................................................................. 5-1
About the Series 2600A examples....................................................................................... 5-1
Equipment required to run the examples ............................................................................. 5-2
Connect the equipment........................................................................................................ 5-2
Logical block diagram of test connections ........................................................................... 5-3
Example 1: Control with separate interfaces ....................................................................... 5-4
Set up communication............................................................................................................... 5-4
Example program code for the Model 707B or 708B ................................................................ 5-5
Example program code for the Model 2635 .............................................................................. 5-5
Example code to run the test..................................................................................................... 5-6
Example 2: Using TSP-Link to configure instruments ......................................................... 5-7
Set up communication............................................................................................................... 5-8
Example program code ............................................................................................................. 5-9
Example code to run the test................................................................................................... 5-10
Example 3: Configure using TSP-Link and interactive triggers ......................................... 5-12
Set up communication............................................................................................................. 5-12
Example program code ........................................................................................................... 5-13
Example program code to run the test .................................................................................... 5-16
Example 4: Using the scanning and triggering model ....................................................... 5-17
Set up communication............................................................................................................. 5-17
Example program code ........................................................................................................... 5-17
Example program code to run the test .................................................................................... 5-20
Using background scans for longer scan lists ......................................................................... 5-21
Working with the Series 2400 .................................................................................... 6-1
About the Series 2400 examples ......................................................................................... 6-1
Equipment required to run the examples ............................................................................. 6-1
Connect the equipment........................................................................................................ 6-1
Logical block diagram of test connections ........................................................................... 6-2
Example 1: Individual commands for switch-measure......................................................... 6-3
Example program code for the Model 2400 .............................................................................. 6-3
Example program code for the Model 707B or 708B ................................................................ 6-4
Example 2: Digital I/O triggering for switch-measure synchronization ................................ 6-5

Models 707B and 708B Switching Matrix User's Manual Table of Contents
707B-900-01 Rev. A / August 2010 iii
Example program code for the Model 2400 .............................................................................. 6-5
Example program code for the Model 707B or 708B ................................................................ 6-6
Overview of running the test...................................................................................................... 6-9
Example code to run the test..................................................................................................... 6-9
Troubleshooting FAQs ............................................................................................... 7-1
About this section................................................................................................................. 7-1
Need different line frequency or voltage .............................................................................. 7-1
Model 4200-SCS does not recognize switch matrix ............................................................ 7-1
"A" model software does not run on "B" models .................................................................. 7-3
Matrix Ready and External Trigger lines.............................................................................. 7-3
Switch matrix does not recognize my card .......................................................................... 7-3
Instrument's internal web page is not accessible................................................................. 7-4
Error when I try to close a channel ...................................................................................... 7-5
Switch relays will not close .................................................................................................. 7-5
Save the present state of the instrument ............................................................................. 7-5
LabVIEW driver for the Model 707B or 708B....................................................................... 7-6
Next steps.................................................................................................................... 8-1
Index....................................................................................................................Index-1

Section 1
Introduction
In this section:
Introduction to this manual ......................................... 1-1
Models 707B and 708B applications .......................... 1-1
CD-ROM contents...................................................... 1-2
Introduction to this manual
The purpose of this manual is to provide detailed tutorials to help you achieve success with your
Keithley Instruments Model 707B or 708B Semiconductor Switching Matrix. The basics of the two
simplest interfaces, the front panel and the web interface, are provided to familiarize you with the
instrument. The tutorials build upon one another, so we recommend that you read this manual from
Section 1 to the end of Section 3. Select and run all examples in Sections 4, 5, and 6 that are relevant
to your intended use and to the equipment you are using.
Some of the examples in this manual may use unfamiliar commands and concepts. For detailed
information about these, refer to the Models 707B and 708B Reference Manual (part number
707B-901-01) on the Product Information CD-ROM that came with your instrument.
Models 707B and 708B applications
Unlike a standalone instrument, the Keithley Instruments Models 707B and 708B are switching
systems that are used to intelligently connect other instruments to multiple devices. This manual
provides application examples that guide you through several common instrument-to-device switching
scenarios. These applications are presented after the summary information about the switching
matrix, and include:
•Working with the Model 4200-SCS (on page 4-1): Demonstrates how to connect the Keithley
Instruments Model 4200 Semiconductor Characterization System to a Model 707B or 708B. This
enables the Model 4200-SCS to automate measurements to multiple devices for DC, C-V, and
pulsed I-V characterization.
•Working with the Series 2600A (on page 5-1): Demonstrates how to use the Model 707B or 708B
with a Keithley Instruments Series 2600A System SourceMeter®instrument to perform an I-V
sweep across a diode.
•Working with the Series 2400 (on page 6-1): Demonstrates the basic interaction of the Model
707B or 708B with a Keithley Instruments Model 2400 SourceMeter instrument, including how to
use digital I/O triggering to synchronize source and measure actions between the Model 707B or
708B and the Model 2400. The concepts in these examples can be applied when used using the
Model 707B or 708B with other SCPI-based instruments.