Tektronix 7019-C Instruction Manual
Model 7019-CSix-Wire Ohms Matrix Card
Instruction Manual
A GREATER MEASURE OF CONFIDENCE
WARRANTY
Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of 1 year
from date of shipment.
Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable
batteries, diskettes, and documentation.
During the warranty period, we will, at our option, either repair or replace any product that proves to be defective.
To exercise this warranty, write or call your local Keithley representative, or contact Keithley headquarters in Cleveland, Ohio.
You will be given prompt assistance and return instructions. Send the product, transportation prepaid, to the indicated service
facility. Repairs will be made and the product returned, transportation prepaid. Repaired or replaced products are warranted for
the balance of the original warranty period, or at least 90 days.
LIMITATION OF WARRANTY
This warranty does not apply to defects resulting from product modification without Keithley’s express written consent, or
misuse of any product or part. This warranty also does not apply to fuses, software, non-rechargeable batteries, damage from
battery leakage, or problems arising from normal wear or failure to follow instructions.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. THE REMEDIES PROVIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES.
NEITHER KEITHLEY INSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT,
INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS
INSTRUMENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS, INC., HAS BEEN ADVISED IN ADVANCE
OF THE POSSIBILITY OF SUCH DAMAGES. SUCH EXCLUDED DAMAGES SHALL INCLUDE, BUT ARE NOT LIMITED TO: COSTS OF REMOVAL AND INSTALLATION, LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY
PERSON, OR DAMAGE TO PROPERTY.
Keithley Instruments, Inc.
BELGIUM: Keithley Instruments B.V.
CHINA: Keithley Instruments China
FRANCE: Keithley Instruments Sarl
GERMANY: Keithley Instruments GmbH
GREAT BRITAIN: Keithley Instruments Ltd
INDIA: Keithley Instruments GmbH
ITALY: Keithley Instruments s.r.l.
NETHERLANDS: Keithley Instruments B.V.
SWITZERLAND: Keithley Instruments SA
TAIWAN: Keithley Instruments Taiwan
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9/00
Model 7019-C Six-Wire Ohms Matrix Card
Instruction Manual
©1996, Keithley Instruments, Inc.
All rights reserved.
Cleveland, Ohio, U.S.A.
Second Printing, April 2001
Document Number: 7019-901-01 Rev. B
Manual Print History
The print history shown below lists the printing dates of all Revisions and Addenda created for this manual. The
Revision Level letter increases alphabetically as the manual undergoes subsequent updates. Addenda, which are
released between Revisions, contain important change information that the user should incorporate immediately into
the manual. Addenda are numbered sequentially. When a new Revision is created, all Addenda associated with the
previous Revision of the manual are incorporated into the new Revision of the manual. Each new Revision includes
a revised copy of this print history page.
Revision A (Document Number 7019-901-01) .................................................... July 1996
Addendum A (Document Number 7019-901-02)....................................... September 1996
Revision B (Document Number 7019-901-01) ................................................... April 2001
All Keithley product names are trademarks or registered trademarks of Keithley Instruments, Inc.
Other brand and product names are trademarks or registered trademarks of their respective holders.
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 the operating information
carefully before using the product.
The types of product users are:
Responsible body
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
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
to keep it operating, for example, setting the line voltage or replacing consumable materials. Maintenance procedures are described in
the manual. The procedures explicitly state if the operator may perform them. Otherwise, they should be performed only by service
personnel.
Service personnel
safe installations and repairs of products. Only properly trained service personnel may perform installation and service procedures.
Keithley products are designed for use with electrical signals that
are rated Installation Category I and Installation Category II, as described in the International Electrotechnical Commission (IEC)
Standard IEC 60664. Most measurement, control, and data I/O signals are Installation Category I and must not be directly connected
to mains voltage or to voltage sources with high transient over-voltages. Installation Category II connections require protection for
high transient over-voltages often associated with local AC mains
connections. The user should assume all measurement, control, and
data I/O connections are for connection to Category I sources unless otherwise marked or described in the Manual.
is the individual or group responsible for the use
use the product for its intended function. They must be
perform routine procedures on the product
are trained to work on live circuits, and perform
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.
that hazardous voltage is present in any unknown circuit before
measuring.
Users of this product must be protected from electric shock at all
times. The responsible body must ensure that users are prevented
access and/or insulated from every connection point. In some cases,
connections must be exposed to potential human contact. Product
users 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 volts,
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, make sure 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.
A good safety practice is to expect
no conductive part of the circuit may be
The instrument and accessories must be used in accordance with its
specifications and operating instructions or the safety of the equipment may be impaired.
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 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 indicates that the user should refer to the operating instructions located in the manual.
The symbol on an instrument shows that it can source or measure 1000 volts or more, including the combined effect of normal
and common mode voltages. Use standard safety precautions to
avoid personal contact with these voltages.
The
WARNING
result in personal injury or death. Always read the associated information very carefully before performing the indicated procedure.
The
CAUTION
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., 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.
heading in a manual explains dangers that might
heading in a manual explains hazards that could
2/01
7019-C Six-Wire Ohms Matrix Card Specifications
MATRIX CONFIGURATION: Dual 3 rows by 6 columns,
plus two utility pathways with two 2-channel multiplexer
rows. Jumpers can be removed to isolate any row from the
backplane.
CONTACT CONFIGURATION: 1 pole Form A.
CONNECTOR TYPE: 96-pin male DIN connector.
MAXIMUM VOLTAGE: Any input to any other input or
chassis: 200V peak.
MAXIMUM CURRENT: 1A carry/0.5A switched.
MAXIMUM POWER: 10VA.
8
CONTACT LIFE: 1V, 10mA: 10
20V, 0.5A: 5 × 10
closures.
4
closures.
CHANNEL RESISTANCE: <0.5Ω initial, 1Ω at end of
contact life.
Force +
Force –
Guard
Sense +
Sense –
Guard Sense
CONTACT POTENTIAL: <25µV per single contact
or pair.
ACTUATION TIME: 500µs.
ISOLATION:
Path: >10
Differential: >10
Common Mode: >10
9
Ω, <50pF.
9
Ω, <400pF.
9
Ω, <400pF.
OFFSET CURRENT: <100pA.
INSERTION LOSS (50
Ω Source, 50Ω Load): <0.35dB
below 1MHz, <3dB below 2MHz.
CROSSTALK (1MHz, 50
Ω Load): –40dB.
RELAY DRIVE CURRENT: 15mA per channel.
ENVIRONMENT: Operating: 0° to 50°C, up to 35°C at
<80% R.H. Storage: –25° to 65°C.
J
J
A
J
J
B
J
J
C
Backplane
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
IN9
IN10
IN11
IN12
A
B
IN13
IN14
IN15
IN16
J
J
D
7/6/96
Table of Contents
1 General Information
1.1 Introduction ............................................................................................................................................................ 1-1
1.2 Features .................................................................................................................................................................. 1-1
1.3 Warranty information.............................................................................................................................................. 1-1
1.4 Manual addenda ...................................................................................................................................................... 1-1
1.5 Safety symbols and terms ....................................................................................................................................... 1-2
1.6 Specifications .......................................................................................................................................................... 1-2
1.7 Unpacking and inspection....................................................................................................................................... 1-2
1.7.1 Inspection for damage..................................................................................................................................... 1-2
1.7.2 Handling precautions ...................................................................................................................................... 1-2
1.7.3 Shipping contents............................................................................................................................................ 1-2
1.7.4 Instruction manual........................................................................................................................................... 1-2
1.7.5 Repacking for shipment .................................................................................................................................. 1-2
1.8 Optional accessories................................................................................................................................................ 1-2
2 Matrix Switching Basics
2.1 Introduction ............................................................................................................................................................ 2-1
2.2 Basic matrix configuration...................................................................................................................................... 2-1
2.2.1 Backplane jumpers.......................................................................................................................................... 2-1
2.2.2 Mainframe analog backplane .......................................................................................................................... 2-1
2.2.3 Row connections to backplane........................................................................................................................ 2-2
2.3 Typical matrix switching schemes.......................................................................................................................... 2-3
2.3.1 Six-wire ohms matrix switching .................................................................................................................... 2-3
2.3.2 Utility pathway switching ............................................................................................................................... 2-3
2.4 Matrix expansion..................................................................................................................................................... 2-3
2.4.1 Isolated switching systems.............................................................................................................................. 2-3
2.4.2 Matrix expansion (dual 3 × 12 matrix) ............................................................................................................. 2-3
i
3 Card Connections and Installation
3.1 Introduction ............................................................................................................................................................ 3-1
3.2 Handling precautions .............................................................................................................................................. 3-1
3.3 Connections ............................................................................................................................................................ 3-1
3.3.1 Backplane row jumpers .................................................................................................................................. 3-1
3.3.2 Connector terminal identification ................................................................................................................... 3-2
3.3.3 Typical connection techniques ....................................................................................................................... 3-4
3.3.4 Connector insulation and cleaning.................................................................................................................. 3-6
3.4 Typical connection schemes ................................................................................................................................... 3-6
3.4.1 Single-card system.......................................................................................................................................... 3-6
3.4.2 Multi-card system ........................................................................................................................................... 3-7
3.5 Model 7019-C installation and removal ................................................................................................................. 3-8
3.5.1 Matrix card installation................................................................................................................................... 3-8
3.5.2 Matrix card removal ....................................................................................................................................... 3-9
4 Operation
4.1 Introduction ............................................................................................................................................................ 4-1
4.2 Safety and signal considerations............................................................................................................................. 4-1
4.2.1 Safety considerations ...................................................................................................................................... 4-1
4.2.2 Maximum signal levels................................................................................................................................... 4-1
4.2.3 Maximizing relay life ..................................................................................................................................... 4-1
4.3 Mainframe control of matrix card........................................................................................................................... 4-1
4.3.1 Channel assignments ...................................................................................................................................... 4-2
4.3.2 Front panel control.......................................................................................................................................... 4-3
4.3.3 IEEE-488 bus operation.................................................................................................................................. 4-3
4.3.4 Automatic crosspoint sequencing ................................................................................................................... 4-3
4.4 Measurement considerations .................................................................................................................................. 4-3
4.4.1 Path isolation .................................................................................................................................................. 4-4
4.4.2 Magnetic fields ............................................................................................................................................... 4-4
4.4.3 Radio frequency interference.......................................................................................................................... 4-4
4.4.4 Ground loops .................................................................................................................................................. 4-4
4.4.5 Keeping connectors clean............................................................................................................................... 4-5
4.5 Six-wire ohms resistance testing applications ........................................................................................................ 4-5
4.5.1 Types of resistor networks.............................................................................................................................. 4-5
4.5.2 Typical resistor network tests ......................................................................................................................... 4-6
4.5.3 Six-wire ohms measurement technique .......................................................................................................... 4-6
4.5.4 Six-wire ohms test switching connections...................................................................................................... 4-7
4.5.5 Basic six-wire ohms test procedure ................................................................................................................ 4-7
4.5.6 Split Kelvin measurement technique .............................................................................................................. 4-8
4.5.7 Split Kelvin test connections .......................................................................................................................... 4-9
4.5.8 Basic test procedure........................................................................................................................................ 4-9
ii
5 Servicing
5.1 Introduction............................................................................................................................................................. 5-1
5.2 Handling and cleaning precautions ......................................................................................................................... 5-1
5.3 Performance verification......................................................................................................................................... 5-1
5.3.1 Environmental conditions ............................................................................................................................... 5-2
5.3.2 Recommended verification equipment ........................................................................................................... 5-2
5.3.3 Matrix card connections.................................................................................................................................. 5-2
5.3.4 Channel resistance tests .................................................................................................................................. 5-4
5.3.5 Offset current tests .......................................................................................................................................... 5-5
5.3.6 Path isolation tests........................................................................................................................................... 5-6
5.3.7 Common-mode isolation tests......................................................................................................................... 5-7
5.4 Special handling of static-sensitive devices............................................................................................................ 5-8
5.5 Principles of operation ............................................................................................................................................ 5-8
5.5.1 Block diagram ................................................................................................................................................. 5-8
5.5.2 Card identification ROM ................................................................................................................................ 5-8
5.5.3 Relay control ................................................................................................................................................... 5-8
5.5.4 Power-on safeguard......................................................................................................................................... 5-8
5.6 Troubleshooting ...................................................................................................................................................... 5-9
5.6.1 Troubleshooting equipment ............................................................................................................................ 5-9
5.6.2 Troubleshooting access ................................................................................................................................... 5-9
5.6.3 Troubleshooting procedure ............................................................................................................................. 5-9
6 Replaceable Parts
6.1 Introduction............................................................................................................................................................. 6-1
6.2 Parts lists ................................................................................................................................................................. 6-1
6.3 Ordering information .............................................................................................................................................. 6-1
6.4 Factory service ........................................................................................................................................................ 6-1
6.5 Component layouts and schematic diagrams .......................................................................................................... 6-1
iii
iv
List of Illustrations
2 Matrix Switching Basics
Figure 2-1 Simplified Model 7019-C schematic .......................................................................................................... 2-2
Figure 2-2 Mainframe analog backplane ...................................................................................................................... 2-2
Figure 2-3 Row connections to backplane.................................................................................................................... 2-2
Figure 2-4 Six-wire ohms matrix switching ................................................................................................................. 2-3
Figure 2-5 Utility pathway switching ........................................................................................................................... 2-3
Figure 2-6 Isolated switching system ........................................................................................................................... 2-4
Figure 2-7 Dual 3 × 12 matrix ........................................................................................................................................ 2-4
3 Card Connections and Installation
Figure 3-1 Backplane row jumpers............................................................................................................................... 3-2
Figure 3-2 Model 7019-C connector terminal identification ........................................................................................ 3-3
Figure 3-3 Typical round cable connection techniques ................................................................................................ 3-5
Figure 3-4 Model 7011-MTR connector pinout ........................................................................................................... 3-6
Figure 3-5 Model 7011-KIT-R assembly, shown with cables ...................................................................................... 3-6
Figure 3-6 Single-card system example........................................................................................................................ 3-7
Figure 3-7 Two-card system connection example ........................................................................................................ 3-8
Figure 3-8 Model 7019-C installation in Model 7001 .................................................................................................. 3-9
Figure 3-9 Model 7019-C installation into Model 7002 ............................................................................................... 3-9
4 Operation
Figure 4-1 Channel status display................................................................................................................................. 4-2
Figure 4-2 Model 7019-C card channel/crosspoint assignments .................................................................................. 4-2
Figure 4-3 Path isolation resistance .............................................................................................................................. 4-4
Figure 4-4 Ground loops ............................................................................................................................................... 4-5
Figure 4-5 Ground loop elimination connections ......................................................................................................... 4-5
Figure 4-6 Types of resistor networks .......................................................................................................................... 4-6
Figure 4-7 Six-wire ohms guarded measurement technique......................................................................................... 4-7
Figure 4-8 Six-wire ohms test connections................................................................................................................... 4-8
Figure 4-9 Split Kelvin measurement technique .......................................................................................................... 4-8
Figure 4-10 Split Kelvin test connections....................................................................................................................... 4-9
v
5 Servicing
Figure 5-1 96-pin connector terminal identification .................................................................................................... 5-3
Figure 5-2 Connections for channel resistance tests .................................................................................................... 5-4
Figure 5-3 Connections for offset current tests ............................................................................................................ 5-5
Figure 5-4 Connections for path isolation tests ............................................................................................................ 5-6
Figure 5-5 Connections for common-mode isolation tests........................................................................................... 5-7
Figure 5-6 Block diagram............................................................................................................................................. 5-9
vi
List of Tables
2 Matrix Switching Basics
Table 2-1 SourceMeter matrix connections................................................................................................................. 2-3
3 Card Connections and Installation
Table 3-1 Backplane jumper identification ................................................................................................................. 3-2
Table 3-2 Connector accessories ................................................................................................................................. 3-4
4 Operation
Table 4-1 Crosspoint channel assignments ................................................................................................................. 4-3
Table 4-2 SourceMeter and matrix card connections.................................................................................................. 4-7
5 Servicing
Table 5-1 Recommended verification equipment ....................................................................................................... 5-2
Table 5-2 Channel resistance test summary ................................................................................................................ 5-5
Table 5-3 Offset current test summary........................................................................................................................ 5-6
Table 5-4 Path isolation test summary ........................................................................................................................ 5-7
Table 5-5 Common-mode isolation test summary ...................................................................................................... 5-8
Table 5-6 Recommended troubleshooting equipment................................................................................................. 5-9
Table 5-7 Troubleshooting procedure ....................................................................................................................... 5-10
6 Replaceable Parts
Table 6-1 Relay board parts list................................................................................................................................... 6-2
Table 6-2 Connector board parts list ........................................................................................................................... 6-2
vii
viii
1
General Information
1.1 Introduction
This section contains general information about the Model
7019-C Six-Wire Ohms Matrix Card. The Model 7019-C is
designed specifically to provide both six-wire ohms connections and “split kelvin” configurations, as well as generalpurpose multiplexing, all in one system. The Model 7019-C
is optimized for use with the series 2400 SourceMeters.
The Model 7019-C assembly consists of a multi-pin (mass
termination) connector card and the relay card. External test
circuit connections to the matrix are made via the 96-pin
male DIN connector on the connector card. Keithley offers a
variety of optional accessories that can be used to make connections to the connector card (refer to paragraph 1.8).
1.2 Features
The Model 7019-C is a single-pole, dual, 3 × 6 (three rows by
six columns) matrix card. Some of the key features include:
• Reed relays for long contact life and fast actuation, making the Model 7019-C suitable for production testing.
• Design optimized for use with the six-wire ohms feature of the series 2400 SourceMeters, while also providing for “split kelvin” connections and general-purpose
multiplexing to resistive networks.
• High isolation resistance (>1G Ω ) for minimal loading
effects when making resistance measurements.
• Low contact potential and offset current for minimal
effects on low-level signals.
• Backplane row jumpers. Cutting jumpers disconnects
rows from the Model 7001 or Model 7002 analog backplane.
1.3 Warranty information
Warranty information is located on the inside front cover of
this manual. Should your Model 7019-C require warranty
service, contact the Keithley representative or authorized repair facility in your area for further information. When returning the matrix card for repair, be sure to fill out and
include the service form at the back of this manual in order
to provide the repair facility with the necessary information.
1.4 Manual addenda
Any improvements or changes concerning the matrix card or
manual will be explained in an addendum included with the
card. Addenda are provided in a page replacement format.
Simply replace the obsolete pages with the new pages.
1-1
General Information
1.5 Safety symbols and terms
The following symbols and terms may be found on an instrument or used in this manual.
The symbol on an instrument indicates that the user
should refer to the operating instructions located in the instruction manual.
The
may be present on the terminal(s). Use standard safety precautions to avoid personal contact with these voltages.
The WARNING heading used in this manual 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 used in this manual explains hazards that could damage the matrix card. Such damage may
invalidate the warranty.
symbol on an instrument indicates that high voltage
1.6 Specifications
Model 7019-C specifications are found at the front of this
manual. These specifications are exclusive of the switching
mainframe specifications.
1.7.3 Shipping contents
The following items are included with every Model 7019-C order:
• Model 7019-C Six-Wire Ohms Matrix Card
• Model 7019-C Instruction Manual
• Additional accessories as ordered
1.7.4 Instruction manual
If an additional instruction manual is required, order the
manual package, Keithley part number 7019-901-00. The
manual package includes an instruction manual and any pertinent addenda.
1.7.5 Repacking for shipment
Should it become necessary to return the Model 7019-C for
repair, carefully pack the unit in its original packing carton
or the equivalent, and include the following information:
• Call the Repair Department at 1-800-552-1115 for a
Return Material Authorization (RMA) number.
• Advise as to the warranty status of the matrix card.
• Write ATTENTION REPAIR DEPARTMENT and the
RMA number on the shipping label.
• Fill out and include the service form located at the back
of this manual.
1.7 Unpacking and inspection
1.7.1 Inspection for damage
The Model 7019-C is packaged in a re-sealable, anti-static
bag to protect it from damage due to static discharge and
from contamination that could degrade its performance. Before removing the card from the bag, observe the following
precautions on handling.
1.7.2 Handling precautions
• Always grasp the card by the side edges and shields. Do
not touch the board surfaces or components.
• When not installed in a Model 7001 or 7002 mainframe,
keep the card in the anti-static bag, and store it in the
original packing carton.
• After removing the card from its anti-static bag, inspect
it for any obvious signs of physical damage. Report any
damage to the shipping agent immediately.
1.8 Optional accessories
The following accessories are available for use with the
Model 7019-C.
Model 7011-KIT-R —This connection kit includes a 96-pin
female DIN connector that will mate directly to the connector on the Model 7019-C or to a standard 96-pin male DIN
bulkhead connector (see Model 7011-MTR). This connector
uses solder cups for connections to external circuitry. It includes an adapter for a round cable and the housing.
Model 7011-MTC-2 —This two-meter round cable assem-
bly is terminated with a 96-pin female DIN connector on
each end. It will mate directly to the connector on the Model
7019-C and to a standard 96-pin male DIN bulkhead connector (see Model 7011-MTR).
Model 7011-MTR —This 96-pin male DIN bulkhead con-
nector uses solder cups for connections to external circuitry.
It will mate to the Model 7011-KIT-R connector and Model
7011-MTC-2 cable assembly.
1-2
2
Matrix Switching Basics
2.1 Introduction
This section covers the basics for matrix switching. For details on card connections and installation, refer to Section 3.
2.2 Basic matrix configuration
A simplified schematic of the Model 7019-C matrix card is
shown in Figure 2-1. The card is configured as two independent 3 × 6 matrices. Each of the 36 crosspoints is made up of
a single-pole switch. By closing the appropriate crosspoint
switch, any of the three rows in one matrix can be connected
to any of the six columns in the same 3 × 6 matrix.
One 3 × 6 matrix switches the FORCE+, FORCE–, and
GUARD signals of the SourceMeter, while the second matrix
switches the SENSE+, SENSE–, and GUARD SENSE terminals. The odd-numbered column inputs (IN1 through IN11)
can be connected to the SENSE+, SENSE–, and GUARD
SENSE rows through the appropriate crosspoints, while the
even-numbered column inputs (IN2 through IN12) can be
switched to the FORCE+, FORCE–, and GUARD rows.
In addition to the two 3 × 6 matrices, there is an extra set of
utility rows (A and B) that can be used for other switching
purposes.
2.2.1 Backplane jumpers
As shown in Figure 2-1, there are four pairs of backplane
jumpers located on the relay card. Six of the jumpers are associated with the six-wire ohms pathways (Banks A, B, and
C). The remaining two jumpers are connected to the utility
pathways A and B, which are connected to Bank D.
With the jumpers installed, the matrix card is connected to
the analog backplane of the Model 7001 or 7002, allowing
matrix expansion with other Model 7019-C cards installed in
the mainframe. With the jumpers removed (cut), the matrix
card is electrically isolated from any other switching card installed in the mainframe.
2.2.2 Mainframe analog backplane
The analog backplane of the mainframe is shown in Figure
2-2.The analog backplane allows the rows of a Model
7019-C matrix card installed in one slot to be connected to
the rows of another Model 7019-C card installed in another
slot of the mainframe.
Each of the four Model 7001/7002 backplane banks has a
high (H), low (L), and guard (G) pathway. The guard pathways are not used by the Model 7019-C.
2-1
Matrix Switching Basics
F
F
M
SourceMeter
6-Wire
Ohms
Rows
FORCE+
FORCE –
GUARD
SENSE +
SENSE –
GUARD SENSE
Backplane
Jumpers
Backplane
Banks
A
B
C
Utility
Rows
A
B
igure 2-1
Simplified Model 7019-C schematic
Model
7019-C
Card 1
FORCE +
SENSE +
FORCE -
SENSE -
GUARD
GUARD SENSE
Mainframe
Analog
Backplane
H
Bank A
L
G
H
Bank B
L
G
H
Bank C
L
G
H
A
B
Bank D
L
G
IN1
IN2 IN3 IN4 IN5 IN6 IN7 IN8 IN9 IN10 IN11 IN12 IN13 IN14 IN15 IN16
6-Wire Ohms Column Inputs Utility Column
Model
7019-C
Card 2
2.2.3 Row connections to backplane
Figure 2-3 shows how rows of the Model 7019-C are connected to the backplane through the backplane jumpers. As noted,
FORCE +
SENSE +
the G (guard) pathways are not used by the Model 7019-C.
The Model 7019-C is shipped from the factory with the
FORCE -
SENSE -
backplane row jumpers installed. Removing (cutting) the
backplane jumpers isolates the card from the backplane, and
subsequently, any card installed in any other slot. For information on removing the jumpers, refer to paragraph 3.3.1.
GUARD
GUARD SENSE
A
B
FORCE +
SENSE +
Inputs
7019-C
Matrix Row
(1 of 8)
D
Mainframe
Analog Backplane
H
L
H = High
L = Low
G = Guard
igure 2-2
ainframe analog backplane
2-2
Backplane
Jumper
Figure 2-3
Row connections to backplane
G
HI
LO
Test Instrument
A
B
IN16IN13
DUTS
Model 7019-C
Matrix Switching Basics
2.3 Typical matrix switching schemes
The following paragraphs give an overview of the two basic
switching schemes that are possible with the Model 7019-C:
six-wire ohms switching and utility pathway switching.
These switching schemes should include shielding configurations to help minimize noise pickup in sensitive measurement applications. These shields are normally connected to
chassis ground. For some test configurations, shielding may
be more effective connected to circuit common. Chassis
ground is accessible at the rear panel of the series 2400
SourceMeters, as well as at the rear panel of the Model 7001/
7002. Note, however, that shields should normally be connected only at one end to avoid noise problems caused by
ground loops.
2.3.1 Six-wire ohms matrix switching
Figure 2-4 shows the basic method for connecting the series
2400 SourceMeters to the two 3 × 6 matrices. Note that the
SourceMeter is connected to the rows, and the DUTs are connected to the columns. Table 2-1 summarizes these connections,
and Section 3 covers connecting methods in more detail.
DUTs
IN1
INPUT/OUTPUT HI
INPUT/OUTPUT LO
V, Ω Guard
4-WIRE SENSE HI
4-WIRE SENSE LO
Guard Sense
2400 Series SourceMeter
FORCE +
FORCE -
GUARD
SENSE +
SENSE -
GUARD SENSE
Model 7019-C
Figure 2-4
Six-wire ohms matrix switching
Table 2-1
SourceMeter matrix connections
SourceMeter jack Model 7019-C terminal
INPUT/OUTPUT HI FORCE+
INPUT/OUTPUT LO FORCE–
V, Ω GUARD GUARD
4-WIRE SENSE HI SENSE+
4-WIRE SENSE LO SENSE–
GUARD SENSE GUARD SENSE
IN12
2.3.2 Utility pathway switching
Figure 2-5 shows typical utility pathway switching. Pathways labeled A and B are connected to Bank D of the mainframe.
Figure 2-5
Utility pathway switching
2.4 Matrix expansion
With the use of additional matrix cards and mainframes, larger
matrices can be configured. Each Model 7001 Switch System
mainframe will accommodate up to two cards, and up to six
mainframes can be connected together, for a maximum of 12
cards in a 7001/7019-C system. Similarly, each Model 7002
Switch System mainframe can accommodate up to 10 cards,
allowing up to 60 Model 7019-C cards in a six mainframe
configuration. The limits on the number of cards in the Model
7001 and 7002 Switch Systems are due to triggering.
2.4.1 Isolated switching systems
Two single-card systems can be configured by removing the
backplane jumpers from one of the cards. The two cards will
be controlled by the same mainframe, but they will be electrically isolated from each other. Figure 2-6 shows an example using two Model 7019-C matrix cards.
2.4.2 Matrix expansion (dual 3 × 12 matrix)
A dual 3 × 12 matrix is configured by installing two "as
shipped" Model 7019-C cards in the Model 7001 mainframe.
By leaving the backplane jumpers installed, the rows of the
matrix card installed in slot 1 (CARD 1) are automatically
connected to the rows of the matrix card installed in slot 2
(CARD 2) through the analog backplane. The dual 3 × 12 matrix is shown in Figure 2-7.
2-3
Matrix Switching Basics
1
1
2
7019-C
Columns
Card 1
16
Mainframe
Analog
Backplane
7019-C
1
Columns
Card 2
16
1
2
3
4
Rows
5
6
7
8
Dual 3X6 Matrix
Figure 2-6
Isolated switching system
7019-C
1
1
2
3
Columns
Card 1
Jumpers
Removed
16
Mainframe
Analog
Backplane
3
4
Rows
5
6
7
8
Dual 3X6 Matrix
7019-C
1
Columns
Card 2
16
1
2
3
4
Rows
5
6
7
8
Figure 2-7
Dual 3x12 matrix
All Backplane
Jumpers Installed
4
5
6
7
8
Rows
2-4
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