Keithley 7001 User Manual

Model 7001 Switch System

Instruction Manual

A GREATER MEASURE OF CONFIDENCE

W ARRANTY

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 Cle veland, 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.

LIMIT A TION OF W ARRANTY

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.

Sales Ofﬁces: BELGIUM: Bergensesteenweg 709 • B-1600 Sint-Pieters-Leeuw • 02-363 00 40 • Fax: 02/363 00 64

CHINA: Yuan Chen Xin Building, Room 705 • 12 Yumin Road, Dewai, Madian • Beijing 100029 • 8610-6202-2886 • Fax: 8610-6202-2892 FINLAND: Tietäjäntie 2 • 02130 Espoo • Phone: 09-54 75 08 10 • Fax: 09-25 10 51 00 FRANCE: 3, allée des Garays • 91127 Palaiseau Cédex • 01-64 53 20 20 • Fax: 01-60 11 77 26 GERMANY: Landsberger Strasse 65 • 82110 Germering • 089/84 93 07-40 • Fax: 089/84 93 07-34 GREAT BRITAIN: Unit 2 Commerce Park, Brunel Road • Theale • Berkshire RG7 4AB • 0118 929 7500 • Fax: 0118 929 7519 INDIA: Flat 2B, Willocrissa • 14, Rest House Crescent • Bangalore 560 001 • 91-80-509-1320/21 • Fax: 91-80-509-1322 ITALY: Viale San Gimignano, 38 • 20146 Milano • 02-48 39 16 01 • Fax: 02-48 30 22 74 KOREA: FL., URI Building • 2-14 Yangjae-Dong • Seocho-Gu, Seoul 137-130 • 82-2-574-7778 • Fax: 82-2-574-7838 NETHERLANDS: Postbus 559 • 4200 AN Gorinchem • 0183-635333 • Fax: 0183-630821 SWEDEN: c/o Regus Business Centre • Frosundaviks Allé 15, 4tr • 169 70 Solna • 08-509 04 679 • Fax: 08-655 26 10 SWITZERLAND: Kriesbachstrasse 4 • 8600 Dübendorf • 01-821 94 44 • Fax: 01-820 30 81 TAIWAN: 1FL., 85 Po Ai Street • Hsinchu, Taiwan, R.O.C. • 886-3-572-9077• Fax: 886-3-572-9031

28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • Fax: 440-248-6168

1-888-KEITHLEY (534-8453) • www.keithley.com

Printed in the U.S.A.

11/01

Model 7001 Switch System Instruction Manual

Cleveland, Ohio, U.S.A.

Document Number 7001-901-01 Rev. H

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 7001-901-01).........................................................................November 1991

Addendum A (Document Number 7001-901-02) ...................................................................November 1991

Addendum A (Document Number 7001-901-03) ...................................................................November 1991

Revision B (Document Number 7001-901-01)..............................................................................January 1992

Revision C (Document Number 7001-901-01) .................................................................................April 1992

Addendum C (Document Number 7001-901-02) ............................................................................. May 1992

Revision D (Document Number 7001-901-01) ................................................................................... July 1992

Addendum D (Document Number 7001-901-02)....................................................................... October 1992

Revision E (Document Number 7001-901-01)........................................................................... February 1993

Revision F (Document Number 7001-901-01) .............................................................................. August 1993

Addendum F (Document Number 7001-901-02)............................................................................. April 1995

Addendum F (Document Number 7001-901-03)........................................................................... March 1996

Addendum F (Document Number 7001-901-04)....................................................................September 1996

Revision G (Document Number 7001-901-01) ............................................................................. August 1997

Revision H (Document Number 7001-901-01).........................................................................December 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 and follow all installation, operation, and maintenance information carefully before using the product. Refer to the manual for complete product speciﬁcations.

If the product is used in a manner not speciﬁed, the protection provided by the product 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 manual. 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, and perform

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. Assume all measurement, control, and data I/O connections are for connection to Category I sources unless otherwise marked or described in the Manual.

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.

A good safety practice is to expect

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 volts,

the circuit may be exposed.

For rack mount equipment in which the power cord is not accessible, in the event of ﬁre or other catastrophic failure, the user must provide a separate power disconnect switch.

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.

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.

no conductive part of

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 heading in a manual explains dangers that might

result in personal injury or death. Alw ays read the associated infor mation very carefully before performing the indicated procedure.

The

CAUTION heading in a manual 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., 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.

11/01

HW 9/6/01

Rev. C

ANALOG BACKPLANE

SIGNALS: Four 3-pole rows (Hi, Lo, Guard). These signals provide matrix

and multiplexer expansion between cards within one mainframe.

MAXIMUM VOLTAGE: 250V DC, 250V RMS, 350V AC peak, signal path to

signal path or signal path to chassis.

MAXIMUM CURRENT: 1A peak. PATH ISOLATION:

>10

Ω, <50pF path to path (any Hi, Lo, Guard to another Hi, Lo,

Guard).

>10

Ω, <50pF differential (Hi to Lo or Hi, Lo to Guard).

>10

Ω, <75pF path to chassis.

CHANNEL CROSSTALK: <–65dB @ 1MHz (50Ωload). BANDWIDTH: <3dB loss at 100MHz (50Ω load).

SYSTEM

CAPACITY: 2 plug-in cards per mainframe. MEMORY: Battery backed-up storage for 100 switch patterns. SWITCH SETTLING TIME: Automatically selected by the mainframe for

each card. Additional time from 0 to 99999.999 seconds can be added in 1ms increments.

TRIGGER SOURCES:

External Trigger (TTL-compatible, programmable edge, 600ns mini-

mum pulse, rear panel BNC). IEEE-488 bus (GET, *TRG) Trigger Link Manual (front panel) Internal Timer, programmable from 1ms to 99999.999 seconds in 1ms

increments.

STATUS OUTPUT: Channel Ready (TTL-compatible signal, rear panel

BNC). Low going pulse (10µs typical) issued after relay settling time. For two different switch cards, 7001 will be set to the slowest relay settling time.

SWITCHING SEQUENCE: Automatic break-before-make. MAINFRAME DIGITAL I/O: 4 open-collector outputs (30V maximum

pull up voltage, 100mA maximum sink current, 10Ω output impedance), 1 TTL compatible input, 1 common.

RELAY DRIVE: 700mA maximum for both card slots. CARD SIZE: 32mm high × 114mm wide × 272mm long (1¼ in × 4½ in

× 10¾ in).

CARD COMPATIBILITY: Fully compatible with all 7XXX cards.

THROUGHPUT

EXECUTION SPEED OF SCAN LIST

7011 Car

d 7015 Car

Individual channels:

130/second 500/second

Memory setups: 125/second 450/second

TRIGGER EXECUTION TIME (maximum time from activation of

Trigger Source to start of switch open or close

SOURCE LATENCY JITTER

GET

200 µs <50 µs

*TRG

5.0 ms Trigger Link 200 µs <13 µs External 200 µs <13 µs

Rates include switch settling time of cards: 3ms for 7011 and 500µs for 7015 cards.

Excluding switch settling time.

Assuming no IEEE-488 commands are pending execution.

IEEE-488 COMMAND EXECUTION TIME

EXECUTION TIME

COMMAND DISPLAY OFF DISPLAY ON

OPEN (@1!1) 7.5 ms 8.5 ms CLOS (@1!1) 7.5 ms 8.5 ms MEM:REC M1 5.0 ms 6.0 ms

Measured from the time at which the command terminator is taken from the

bus to the time at which the relay begins to open or close.

IEEE-488 BUS IMPLEMENTATION

STANDARDS CONFORMANCE: Conforms to SCPI-1990, IEEE-488.2

and IEEE-488.1.

MULTILINE COMMANDS: DCL, LLO, SDC, GET, GTL, UNT, UNL,

SPE, SPD.

UNILINE COMMANDS: IFC, REN, EOI, SRQ, ATN. INTERFACE FUNCTIONS: SH1, AH1,T5, TE0, L4, LE0, SR1, RL1, PP0,

DC1, DT1, C0, E1.

GENERAL

DISPLAY: Dual-line vacuum fluorescent.

1st line: 20-character alphanumeric. 2nd line: 32-character alphanumeric.

REAR PANEL CONNECTORS:

IEEE-488 8-pin micro DIN connector for digital I/O 8-pin micro DIN for Trigger Link 8-pin micro DIN for Trigger Link expansion BNC for External Trigger BNC for Channel Ready

POWER: 100V to 240V RMS , 50/60 Hz, 50VA maximum. EMC: Complies with

to European Union Directive 89/336/EEC,

EN61326-1.

SAFETY: Conforms to European Union Directive 73/23/EEC,

EN61010-1.

EMI/RFI: Meets VDE 0871B and FCC Class B. ENVIRONMENT:

Operating: 0°–50°C, <80% relative humidity (0°–35°C). Storage: –25° to +65°C.

DIMENSIONS, WEIGHT: 89mm high × 216mm wide × 375mm deep

(3½ in × 8½ in × 14¾ in). Net weight 3.4kg (7½ lbs).

Specifications subject to change without notice.

7001 High Density Switch System Specifications

1 General Information

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

1.2 Features.............................................................................................................................................................. 1-1

1.3 Warranty information...................................................................................................................................... 1-1

1.4 Manual addenda .............................................................................................................................................. 1-2

1.5 Safety symbols and terms ............................................................................................................................... 1-2

1.6 Specifications .................................................................................................................................................... 1-2

1.7 Inspection .......................................................................................................................................................... 1-2

1.8 Optional accessories......................................................................................................................................... 1-2

2 Card Installation

2.1 Introduction ...................................................................................................................................................... 2-1

2.2 Model 701X series card installation ............................................................................................................... 2-1

2.3 Non-701X series cards ..................................................................................................................................... 2-2

3 Getting Started

3.1 Introduction ...................................................................................................................................................... 3-1

3.2 Front and rear panel configurations.............................................................................................................. 3-1

3.2.1 Front panel controls ................................................................................................................................. 3-1

3.2.2 Rear panel.................................................................................................................................................. 3-1

3.2.3 Channel status display ............................................................................................................................ 3-4

3.3 Operation demo................................................................................................................................................ 3-7

3.3.1 Initial configuration ................................................................................................................................. 3-7

3.3.2 Close and open channels......................................................................................................................... 3-7

3.3.3 Scan channels............................................................................................................................................ 3-8

3.4 Overview of scan process.............................................................................................................................. 3-10

3.5 Initial configuration ....................................................................................................................................... 3-11

3.5.1 Switching card simulators .................................................................................................................... 3-11

3.5.2 Installing switching cards ..................................................................................................................... 3-12

3.5.3 Card type................................................................................................................................................. 3-12

3.6 Front panel operation .................................................................................................................................... 3-13

3.6.1 Close/open operation example............................................................................................................ 3-13

3.6.2 Scan operation example ........................................................................................................................ 3-15

3.7 IEEE-488.2 and SCPI basics........................................................................................................................... 3-18

3.7.1 Bus connections ...................................................................................................................................... 3-19

3.7.2 Primary address ..................................................................................................................................... 3-19

3.7.3 Abbreviated common command summary ....................................................................................... 3-19

3.7.4 Abbreviated SCPI command summary .............................................................................................. 3-19

3.7.5 Syntax rules............................................................................................................................................. 3-20

3.7.6 Programming examples ........................................................................................................................ 3-22

4 Front Panel Operation

4.1 Introduction....................................................................................................................................................... 4-1

4.2 Power-up procedure ........................................................................................................................................ 4-1

4.2.1 Line power connections........................................................................................................................... 4-1

4.2.2 Power switch ............................................................................................................................................. 4-2

4.2.3 Power-up sequence .................................................................................................................................. 4-2

4.3 Display ............................................................................................................................................................... 4-3

4.3.1 Channel status display............................................................................................................................. 4-4

4.3.2 Information and error messages............................................................................................................. 4-5

4.3.3 Annunciators............................................................................................................................................. 4-5

4.4 Analog backplane ............................................................................................................................................. 4-6

4.5 Mainframe programming................................................................................................................................ 4-8

4.5.1 Channel assignments ............................................................................................................................... 4-8

4.5.2 Channel list and scan list....................................................................................................................... 4-10

4.5.3 Closing and opening channels.............................................................................................................. 4-12

4.5.4 Scanning channels .................................................................................................................................. 4-13

4.5.5 Storing channel patterns (STORE and RECALL)............................................................................... 4-20

4.6 MENU .............................................................................................................................................................. 4-22

4.6.1 SAVESETUP ............................................................................................................................................ 4-24

4.6.2 GPIB.......................................................................................................................................................... 4-25

4.6.3 DIGITAL-I/O.......................................................................................................................................... 4-26

4.6.4 TEST.......................................................................................................................................................... 4-27

4.6.5 LANGUAGE ........................................................................................................................................... 4-27

4.6.6 GENERAL................................................................................................................................................ 4-27

4.7 CARD CONFIG .............................................................................................................................................. 4-28

4.7.1 TYPE ......................................................................................................................................................... 4-29

4.7.2 #-OF-POLES ............................................................................................................................................ 4-31

4.7.3 CARD-PAIR............................................................................................................................................. 4-32

4.7.4 DELAY ..................................................................................................................................................... 4-32

4.7.5 READ-I/O-CARD .................................................................................................................................. 4-33

4.8 SCAN CONFIG............................................................................................................................................... 4-33

4.8.1 CHAN-CONTROL ................................................................................................................................. 4-35

4.8.2 SCAN CONTROL................................................................................................................................... 4-38

4.8.3 ARM CONTROL..................................................................................................................................... 4-40

4.8.4 Channel restrictions................................................................................................................................ 4-42

4.9 Digital I/O port............................................................................................................................................... 4-43

4.9.1 Controlling digital circuitry .................................................................................................................. 4-44

4.9.2 Digital input channel.............................................................................................................................. 4-46

4.9.3 I/O port connections.............................................................................................................................. 4-46

4.10 External triggering.......................................................................................................................................... 4-48

4.10.1 External trigger ....................................................................................................................................... 4-48

4.10.2 Channel ready ......................................................................................................................................... 4-49

4.10.3 External triggering example.................................................................................................................. 4-49

4.11 Trigger Link..................................................................................................................................................... 4-51

4.11.1 Asynchronous operation ....................................................................................................................... 4-51

4.11.2 Semi-synchronous operation ................................................................................................................ 4-59

4.12 DUT test system using two switching mainframes ....................................................................................4-63

4.12.1 DMM settings...........................................................................................................................................4-64

4.12.2 Switching mainframe A settings (7001)................................................................................................4-65

4.12.3 Switching mainframe B settings (7001) ................................................................................................4-66

4.12.4 Run DUT test SYSTem ............................................................................................................................4-66

4.12.5 Operation details .....................................................................................................................................4-67

5 IEEE-488 Reference

5.1 Introduction ...................................................................................................................................................... 5-1

5.2 IEEE-488 bus connections ............................................................................................................................... 5-2

5.3 Primary address selection ............................................................................................................................... 5-4

5.4 Controller programming................................................................................................................................. 5-4

5.5 Front panel aspects of IEEE-488 operation ................................................................................................... 5-5

5.5.1 Error and status messages ...................................................................................................................... 5-5

5.5.2 IEEE-488 status indicators....................................................................................................................... 5-5

5.5.3 LOCAL key ............................................................................................................................................... 5-5

5.6 Status structure ................................................................................................................................................. 5-5

5.6.1 Standard event status .............................................................................................................................. 5-7

5.6.2 Operation event status............................................................................................................................. 5-8

5.6.3 Arm event status .................................................................................................................................... 5-11

5.6.4 Sequence event status............................................................................................................................ 5-13

5.6.5 Trigger event status ............................................................................................................................... 5-15

5.6.6 Questionable event status ..................................................................................................................... 5-18

5.6.7 Queues ..................................................................................................................................................... 5-18

5.6.8 Status byte and service request (SRQ)................................................................................................. 5-18

5.7 Trigger model (IEEE-488 operation).............................................................................................................5-21

5.8 General bus commands ................................................................................................................................. 5-26

5.8.1 REN (remote enable).............................................................................................................................. 5-26

5.8.2 IFC (interface clear)................................................................................................................................ 5-27

5.8.3 LLO (local lockout) ................................................................................................................................ 5-27

5.8.4 GTL (go to local) and local.................................................................................................................... 5-27

5.8.5 DCL (device clear).................................................................................................................................. 5-27

5.8.6 SDC (selective device clear).................................................................................................................. 5-28

5.8.7 GET (group execute trigger)................................................................................................................. 5-28

5.8.8 SPE, SPD (serial polling) ....................................................................................................................... 5-28

5.9 Programming syntax ......................................................................................................................................5-29

5.10 Common commands...................................................................................................................................... 5-37

5.10.1 *CLS

5.10.2 *ESE

5.10.3 *ESE?

5.10.4 *ESR?

5.10.5 *IDN?

5.10.6 *OPC

5.10.7 *OPC?

5.10.8 *OPT?

5.10.9 *RCL

5.10.10 *RST

5.10.11 *SAV

5.10.12 *SRE

5.10.13 *SRE?

5.10.14 *STB?

5.10.15 *TRG

5.10.16 *TST?

5.10.17 *WAI

5.11 :DISPlay subsystem........................................................................................................................................ 5-67

5.12 :OUTPut subsystem ....................................................................................................................................... 5-73

5.13 [:ROUTe] subsystem ...................................................................................................................................... 5-75

5.13.1 :CLOSe <list> ........................................................................................................................................... 5-76

5.13.2 :OPEN <list>|ALL..................................................................................................................................5-78

5.13.3 :SCAN <list> ............................................................................................................................................5-79



clear status................................................................................................................................ 5-39



event status enable .................................................................................................................. 5-40



event status enable query ..................................................................................................... 5-42



event status register query ................................................................................................... 5-43



identification query............................................................................................................... 5-45



operation complete................................................................................................................. 5-46



operation complete query ................................................................................................... 5-48



option identification query.................................................................................................. 5-50



recall.......................................................................................................................................... 5-51



reset............................................................................................................................................ 5-52



save ........................................................................................................................................... 5-54



service request enable ............................................................................................................. 5-55



service request enable query................................................................................................ 5-57



status byte query.................................................................................................................... 5-58



trigger....................................................................................................................................... 5-60



self-test query ......................................................................................................................... 5-61



wait-to-continue ..................................................................................................................... 5-62

iii

5.13.4 :FCHannels <lsit> ....................................................................................................................................5-81

5.13.5 :BBMake <b> ............................................................................................................................................5-82

5.13.6 :SCHannel <b> .........................................................................................................................................5-82

5.13.7 :CPAir <b>................................................................................................................................................5-83

5.13.8 <CTYPe <name>......................................................................................................................................5-84

5.13.9 :POLE <NRf> ...........................................................................................................................................5-85

5.13.10 :STIMe <n> ...............................................................................................................................................5-87

5.13.11 :SAVE M<num>.......................................................................................................................................5-88

5.13.12 :RECall M<num>.....................................................................................................................................5-88

5.14 Sense Subsystems ........................................................................................................................................... 5-91

5.15 :SOURce subsystem........................................................................................................................................ 5-93

5.16 :STATus subsystem ........................................................................................................................................ 5-95

5.16.1 [:EVENt]? ..................................................................................................................................................5-96

5.16.2 :ENABle <NRf>......................................................................................................................................5-100

5.16.3 :PTRansition <NRf> ..............................................................................................................................5-104

5.16.4 :NTRansition <NRf> .............................................................................................................................5-109

5.16.5 :CONDition?...........................................................................................................................................5-111

5.16.6 :PREset.....................................................................................................................................................5-112

5.16.7 :QUEue commands................................................................................................................................5-113

5.17 :SYSTem Subsystem ......................................................................................................................................5-117

5.17.1 :PRESet ....................................................................................................................................................5-117

5.17.2 :POSetup <name>..................................................................................................................................5-117

5.17.3 :VERSion?................................................................................................................................................5-118

5.17.4 :ERRor?....................................................................................................................................................5-119

5.18 Trigger subsystem ........................................................................................................................................ 5-121

5.18.1 :INITiate commands..............................................................................................................................5-123

5.18.2 :ABORt ....................................................................................................................................................5-124

5.18.3 :IMMediate .............................................................................................................................................5-124

5.18.4 :COUNt <n> ...........................................................................................................................................5-125

5.18.5 :DELay <n>.............................................................................................................................................5-127

5.18.6 :SOURce <name>...................................................................................................................................5-128

5.18.7 :TIMer <n>..............................................................................................................................................5-130

5.18.8 :SIGNal ....................................................................................................................................................5-131

5.18.9 TCONfigure commands .......................................................................................................................5-131

6 Theory of Operation

6.1 Introduction....................................................................................................................................................... 6-1

6.2 Overall functional description .........................................................................................................................6-1

6.3 Control function.................................................................................................................................................6-3

6.3.1 Reset circuitry............................................................................................................................................ 6-3

6.3.2 Address decoding..................................................................................................................................... 6-3

6.3.3 Memory...................................................................................................................................................... 6-3

6.4 Relay control circuitry.......................................................................................................................................6-5

6.4.1 Backplane interface................................................................................................................................... 6-5

6.4.2 Switch card interface................................................................................................................................ 6-7

6.4.3 ID data circuits .......................................................................................................................................... 6-7

6.4.4 Relay control.............................................................................................................................................. 6-9

6.4.5 Power-on safeguard ................................................................................................................................. 6-9

6.4.6 Display board circuitry............................................................................................................................ 6-9

6.4.7 External control signals.......................................................................................................................... 6-11

6.4.8 IEEE-488 interface................................................................................................................................... 6-11

6.4.9 Power supplies........................................................................................................................................ 6-11

7 Maintenance

7.1 Introduction ...................................................................................................................................................... 7-1

7.2 Service options................................................................................................................................................... 7-1

7.3 Handling and cleaning .....................................................................................................................................7-2

7.3.1 Backplane board ........................................................................................................................................ 7-2

7.3.2 Static-sensitive devices ............................................................................................................................. 7-2

7.4 Routine maintenance ........................................................................................................................................7-3

7.4.1 Line voltage selection .............................................................................................................................. 7-3

7.4.2 Changing the fuse .................................................................................................................................... 7-3

7.4.3 Changing the battery ................................................................................................................................7-3

7.4.4 Changing firmware.................................................................................................................................. 7-4

7.5 Disassembly of the instrument........................................................................................................................7-4

7.5.1 Removal of the case.................................................................................................................................. 7-4

7.5.2 Removal of individual boards................................................................................................................ 7-5

7.5.3 Replacement of the case ...........................................................................................................................7-7

7.6 Diagnostics .........................................................................................................................................................7-8

7.6.1 Preparations for running the diagnostics ............................................................................................. 7-8

7.6.2 Initial power-up test ................................................................................................................................ 7-8

7.6.3 Non-volatile memory test ........................................................................................................................7-8

7.6.4 Built-in-tests .............................................................................................................................................. 7-9

7.6.5 Display test

7.6.6 Display test

7.6.7 Display test Ñ char set ...........................................................................................................................7-11

7.7 Test description and notes .............................................................................................................................7-11

7.7.1 Initial power-up test .............................................................................................................................. 7-11

7.7.2 Non-volatile memory tests.................................................................................................................... 7-12

7.7.3 Built-in-tests .............................................................................................................................................7-12

7.8 Troubleshooting .............................................................................................................................................. 7-14

7.8.1 Digital board ........................................................................................................................................... 7-14

7.8.2 Display board.......................................................................................................................................... 7-15

7.8.3 Power supply........................................................................................................................................... 7-15

7.8.4 Micro DIN board .................................................................................................................................... 7-16

7.8.5 Backplane board ..................................................................................................................................... 7-16

7.8.6 BNC board................................................................................................................................................ 7-16



keys................................................................................................................................ 7-10



patterns ......................................................................................................................... 7-10

8 Replaceable Parts

8.1 Introduction ...................................................................................................................................................... 8-1

8.2 Electrical components list ................................................................................................................................ 8-1

8.3 Mechanical parts ............................................................................................................................................... 8-1

8.4 Ordering information .......................................................................................................................................8-1

8.5 How to obtain factory service ......................................................................................................................... 8-1

8.6 Document list ..................................................................................................................................................... 8-2

Appendices

A Interface Function Codes ............................................................................................................................... A-1

B ASCII Character Codes and IEEE-488 Multiline Interface Command Messages ................................... B-1

C Controller Programs ....................................................................................................................................... C-1

D IEEE-488 Bus Overview.................................................................................................................................. D-1

E IEEE-488 Conformance Information ............................................................................................................. E-1

F SCPI Conformance Information..................................................................................................................... F-1

List of Illustrations

2 Card Installation

Figure 2-1 Multi-pin card installation...................................................................................................................... 2-3

Figure 2-2 Screw terminal card installation ............................................................................................................ 2-4

3 Getting Started

Figure 3-1 Model 7001 front panel............................................................................................................................ 3-2

Figure 3-2 Model 7001 rear panel ............................................................................................................................. 3-3

Figure 3-3 Channel status display ............................................................................................................................ 3-5

Figure 3-4 Channel assignments (matrix cards)..................................................................................................... 3-5

Figure 3-5 Channel assignments (non-matrix type cards).................................................................................... 3-6

Figure 3-6 Simplified model of scan operation..................................................................................................... 3-10

4 Front Panel Operation

Figure 4-1 Display format.......................................................................................................................................... 4-3

Figure 4-2 Channel status display ............................................................................................................................ 4-4

Figure 4-3 Interpreting channel status display....................................................................................................... 4-4

Figure 4-4 Model 7001 analog backplane ................................................................................................................ 4-7

Figure 4-5 Matrix row connections to backplane ................................................................................................... 4-7

Figure 4-6 Channel assignments (non-matrix type cards).................................................................................... 4-8

Figure 4-7 Channel assignments (matrix cards)..................................................................................................... 4-9

Figure 4-8 Trigger Model (Front panel scan operation)...................................................................................... 4-14

Figure 4-9 Digital I/O port simplified schematic.................................................................................................. 4-43

Figure 4-10 Sample externally powered relay ........................................................................................................ 4-46

Figure 4-11 Digital I/O port .......................................................................................................................................4-47

Figure 4-12 Digital I/O connections using trigger link cable............................................................................... 4-48

Figure 4-13 External triggering connectors (BNC)................................................................................................. 4-48

Figure 4-14 External trigger and asynchronous Trigger Link Input pulse specifications................................ 4-48

Figure 4-15 Channel ready and asynchronous Trigger Link Output pulse specifications .............................. 4-49

Figure 4-16 DUT test system ..................................................................................................................................... 4-50

Figure 4-17 External trigger connectors................................................................................................................... 4-50

Figure 4-18 Trigger link connectors.......................................................................................................................... 4-51

Figure 4-19 DUT test system ..................................................................................................................................... 4-52

Figure 4-20 Trigger Link connections (asynchronous example #1)..................................................................... 4-52

vii

Figure 4-21 Operation model for asynchronous Trigger Link example #1 ........................................................ 4-54

Figure 4-22 Connections using Trigger Link adapter ............................................................................................ 4-55

Figure 4-23 DUT test system (asynchronous example #2) .................................................................................... 4-56

Figure 4-24 Trigger Link connections (asynchronous example #2) ..................................................................... 4-56

Figure 4-25 Operation model for asynchronous Trigger Link example #2 ........................................................ 4-58

Figure 4-26 Semi-synchronous trigger link pulse specifications .......................................................................... 4-59

Figure 4-27 Typical semi-synchronous mode connections.................................................................................... 4-59

Figure 4-28 Trigger Link connections (semi-synchronous example)................................................................... 4-60

Figure 4-29 Operation model for semi-synchronous Trigger Link example ...................................................... 4-62

Figure 4-30 DUT test system.......................................................................................................................................4-63

Figure 4-31 Trigger link connections .........................................................................................................................4-64

Figure 4-32 Digital multimeter flowchart .................................................................................................................4-68

Figure 4-33 Digital multimeter block diagram.........................................................................................................4-69

5 IEEE-488 Reference

Figure 5-1 IEEE-488 connector................................................................................................................................... 5-2

Figure 5-2 IEEE-488 connections............................................................................................................................... 5-2

Figure 5-3 IEEE-488 connector location.................................................................................................................... 5-3

Figure 5-4 Contact assignments ................................................................................................................................ 5-3

Figure 5-5 Model 7001 status register structure...................................................................................................... 5-6

Figure 5-6 Standard event status............................................................................................................................... 5-7

Figure 5-7 Operation event status............................................................................................................................. 5-9

Figure 5-8 Arm event status..................................................................................................................................... 5-11

Figure 5-9 Sequence event status ............................................................................................................................ 5-14

Figure 5-10 Trigger event status................................................................................................................................ 5-16

Figure 5-11 Status byte and service request (SRQ)................................................................................................. 5-19

Figure 5-12 Trigger model (IEEE-488 bus operation)..............................................................................................5-22

Figure 5-13 Standard Event Status Enable Register ............................................................................................... 5-41

Figure 5-14 Standard Event Status Register ............................................................................................................ 5-44

Figure 5-15 Service Request Enable Register........................................................................................................... 5-56

Figure 5-16 Status Byte Register................................................................................................................................ 5-59

Figure 5-17 Operation Event Register ...................................................................................................................... 5-98

Figure 5-18 Trigger Event Register ........................................................................................................................... 5-98

Figure 5-19 Arm Event Register ................................................................................................................................ 5-99

Figure 5-20 Sequence Event Register...................................................................................................................... 5-100

Figure 5-21 Operation Event Enable Register ....................................................................................................... 5-102

Figure 5-22 Trigger Event Enable Register ............................................................................................................ 5-102

Figure 5-23 Arm Event Enable Register ..................................................................................................................5-103

Figure 5-24 Sequence Event Enable Register..........................................................................................................5-103

Figure 5-25 Operation Transition Filter...................................................................................................................5-105

Figure 5-26 Trigger Transition Filter .......................................................................................................................5-106

Figure 5-27 Arm Transition Filter ............................................................................................................................5-107

Figure 5-28 Sequence Transition Filter................................................................................................................... 5-108

viii

6 Theory of Operation

Figure 6-1 Model 7001 system block diagram....................................................................................................... 6-2

Figure 6-2 Block diagram

Figure 6-3 Backplane interface simplified schematic........................................................................................... 6-6

Figure 6-4 Timing diagram Figure 6-5 Block diagram

Figure 6-6 Timing diagram, IDCLK and IDDATA .............................................................................................. 6-8

Figure 6-7 Start and stop sequences ....................................................................................................................... 6-9

Figure 6-8 Display board block diagram ............................................................................................................. 6-10

Figure 6-9 BNC board block diagram .................................................................................................................. 6-11

Figure 6-10 Micro DIN board block diagram........................................................................................................ 6-12



digital circuitry and memory................................................................................ 6-4



backplane interface WRITE................................................................................ 6-7



backplane interface (one slot) ............................................................................... 6-8

7 Maintenance

Figure 7-1 First pattern for display test................................................................................................................ 7-11

Appendices

Figure D-1 IEEE-488 bus configuration ................................................................................................................... D-2

Figure D-2 IEEE-488 handshake sequence ............................................................................................................... D-3

Figure D-3 Command codes...................................................................................................................................... D-7

List of Tables

3 Getting Started

Table 3-1 Abbreviated common command summary ....................................................................................... 3-19

Table 3-2 Abbreviated SCPI command summary .............................................................................................. 3-20

4 Front Panel Operation

Table 4-1 Error and status messages ...................................................................................................................... 4-5

Table 4-2 MENU structure ..................................................................................................................................... 4-23

Table 4-3 Default conditions .................................................................................................................................. 4-25

Table 4-4 CARD CONFIG MENU structure ....................................................................................................... 4-29

Table 4-5 TYPE assignments .................................................................................................................................. 4-30

Table 4-6 CONFIGURE SCAN menu structure .................................................................................................. 4-33

5 IEEE-488 Reference

Table 5-1 IEEE contact designations ....................................................................................................................... 5-3

Table 5-2 HP BASIC 4.0 IEEE-488 statements ....................................................................................................... 5-5

Table 5-3 General bus commands and associated BASIC statements ............................................................. 5-26

Table 5-4 IEEE-488.2 common commands and queries ..................................................................................... 5-38

Table 5-5 Default conditions .................................................................................................................................. 5-53

Table 5-6 DISPlay command summary................................................................................................................ 5-67

Table 5-7 OUTPut command summary ............................................................................................................... 5-73

Table 5-8 ROUTe command summary................................................................................................................. 5-75

Table 5-9 SENSe command summary .................................................................................................................. 5-91

Table 5-10 SOURce command summary ............................................................................................................... 5-93

Table 5-11 STATus command summary................................................................................................................ 5-95

Table 5-12 SYSTem command summary ............................................................................................................. 5-117

Table 5-13 Trigger command summary............................................................................................................... 5-121

7 Maintenance

Table 7-1 Power supply checks ............................................................................................................................. 7-16

8 Replaceable Partsd

Table 8-1 Digital board, parts list .............................................................................................................................8-3

Table 8-2 Digital board, parts list .............................................................................................................................8-5

Table 8-3 Micro DIN board, parts list ......................................................................................................................8-7

Table 8-4 Backplane board, parts list .......................................................................................................................8-9

Table 8-5 BNC board, parts list .................................................................................................................................8-1

Appendices

Table A-1 Model 7001 interface function codes ................................................................................................... A-2

Table C-1 BASIC statements necessary to send bus commands ........................................................................ C-3

Table D-1 IEEE-488 bus command summary ....................................................................................................... D-5

Table D-2 Hexadecimal and decimal command codes ....................................................................................... D-8

Table D-3 Typical addressed command sequence ............................................................................................... D-8

Table D-4 Typical common command sequence ................................................................................................. D-9

Table D-5 IEEE command groups .......................................................................................................................... D-9

Table E-1 IEEE-488 documentation requirements................................................................................................ E-1

Table F-1 Syntax of SCPI confirmed commands implemented by Model 7001............................................... F-1

Table F-2 Syntax of non-SCPI commands implemented by Model 7001.......................................................... F-5

xii

General Information

1.1 Introduction

This section contains general information about the Model 7001 Switch System.

1.2 Features

1.3 Warranty Information

1.4 Manual Addenda

1.5 Safety Symbols and Terms

1.6 SpeciÞcations

1.7 Inspection

1.8 Optional Accessories

1.2 Features

Some important Model 7001 features include:

¥ Analog Backplane

connect the rows or banks of a Model 701X series card installed in one slot to the rows or banks of a second Model 701X series card installed in the other slot.

¥ Close/Open or Scan

close and/or open one or more channels, or scan through a speciÞed list of channels.

¥ Channel Status Display

play monitors the state (closed or open) of all available channels.

¥ Memory

open and closed channels) and 10 customized instrument setups can be saved in memory for later recall.

¥ IEEE-488 Bus

IEEE-488.2 and SCPI standards.

¥ Trigger Link

more versatile and precise external triggering. This is in addition to the standard in/out BNC external triggering technique.



Up to 100 channel patterns (pattern of



Can be used to internally



The Model 7001 can simply



The real-time status dis-



Bus operation conforms to the



New trigger concept to provide

¥ High Density Switching

mainframe using two switching cards.

¥ Switching Cards

cards designed speciÞcally for the Model 7001 (i.e. Models 7011, 7012 and 7013), you can use the switching cards that were originally designed for the Keithley Models 705 and 706 scanners.



Up to 80 channels per

In addition to the switching

1.3 Warranty information

Warranty information is located on the inside front cover of this instruction manual. Should your Model 7001 require warranty service, contact the Keithley representative or authorized repair facility in your area for further information. When returning the instrument for repair, be sure to Þll out and include the service

1-1

General Information

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 instrument or manual will be explained in an addendum included with the manual. Be sure to note these changes and incorporate them into the manual.

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.

1.7 Inspection

The Model 7001 was carefully inspected, both electrically and mechanically before shipment. After unpacking all items from the shipping carton, check for any obvious signs of physical damage that may have occurred during transit. Report any damage to the shipping agent immediately. Save the original packing carton for possible future reshipment. The following items are included with every Model 7001 order:

¥ Model 7001 Switch System

¥ Model 7001 Instruction Manual

¥ Accessories as ordered.

If an additional instruction manual is required, order the manual package, Keithley part number 7001-901-

00. The manual package includes an instruction manual and any pertinent addenda.

1.8 Optional accessories

The symbol on an instrument shows that high voltage 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 scanner card. Such damage may invalidate the warranty.

1.6 Speciﬁcations

Model 7001 speciÞcations may be found at the front of this manual.

The following accessories are available from Keithley for use with the Model 7001.

Model 4288-1 Single Fixed Rack Mount Kit; mounts a

single Model 7001 in a standard 19-inch rack.

Model 4288-2 Dual Fixed Rack Mount Kit; mounts

two Model 7001s side-by-side in a standard 19-inch rack.

Model 4288-3 Dual Fixed Rack Mount Kit; mounts

one Model 7001 and a Model 199 DMM side-by-side in a standard 19-inch rack.

Model 8502 Trigger Link Adapter; allows you to con-

nect the Trigger Link of the Model 7001 to an instrument that uses the standard BNC (In/Out) external triggering technique.

1-2

General Information

Models 8501-1 and 8501-2 Trigger Link Cables: The

Model 8501-1 is one meter in length, and the Model 8501-2 is two meters in length.

Model 7007 Shielded IEEE-488 Cables: Connects the

Model 7001 to the IEEE-488 bus using shielded cables to reduce electromagnetic interference (EMI). The Model 7007-1 is one meter in length and has an EMI shielded IEEE-488 connector at each end. The Model 7007-2 is identical to the Model 7007-1, but is two meters in length.

1-3

Card Installation

ATTENTION FIRST TIME USERS

If you are a ﬁrst time user , it is recommended that you perform the operation demo in Section 3, Getting Started (paragraph 3.3) before installing any switching cards into the mainframe. This demo will acquaint you with basic front panel operation.

WARNING

The procedures in this section are intended for use only by qualiÞed service personnel. Do not perform these procedures unless qualiÞed to do so. Failure to recognize and observe normal safety precautions could result in personal injury or death.

2.1 Introduction

The Model 7001 is designed to be used with the Model 701X series switch cards (i.e. Model 7011, 7012, and

7013), and with cards that were originally designed to be used with the Keithley Model 705/706 scanners.

2.3 Non-701X series card installation: Explains how

to install cards designed for the Model 705/706 scanner in the Model 7001.

2.2 Model 701X series card installation

WARNING

Turn off power from all instrumentation (including the Model 7001 mainframe) and disconnect their line cords. Make sure all power is removed and stored energy in external circuitry is discharged.

NOTE

Installation procedures in this section are organized as follows:

2.2 Model 701X series card installation: Explains how

to install a Model 701X series card (such as the Model 7011, 7012, or 7013) card in the Model 7001.

If using the screw terminal connector card, make sure your external circuitry is wired to the card (as explained in the instruction manual for the card) before installing the card assembly in the Model 7001 mainframe.

2-1

Card Installation

CAUTION

To prevent contamination to the switch card that could degrade performance, only handle the card assembly by the edges and shields. If contamination occurs, clean the card as explained in its instruction manual.

Card installation

Perform the following steps to install the card assembly in the Model 7001 mainframe:

1. Mate the connector card to the relay card if they are separate. Make sure to handle the cards by the edges and shields to prevent contamination.

2. Facing the rear panel of the Model 7001, select the slot (CARD 1 or CARD 2) that you wish to install the card in.

3. Referring to Figure 2-1 or Figure 2-2, feed the card assembly into the desired slot such that the edges of the relay card ride in the rails.

4. With the ejector arms in the unlocked position, push the card assembly into the mainframe until the arms engage into the ejector cups. Then push both arms inward to lock the card all the way into mainframe.

5. For the multi-pin connector card, install the screw shown in Figure 2-1.

Notes:

1. Once a Model 701X series card is installed in the mainframe, the Model 7001 automatically identiÞes it on power up. This ID allows the Model 7001 to conÞgure itself for proper operation.

2. When a Model 701X series card is installed, the slot assignment (Card TYPE) is performed automatically on power-up. A slot assignment change could make a channel that is currently included in the Scan List and/or a Channel Pattern unavailable. The unavailable channel causes the Scan List and/ or the affected Channel Pattern to clear (see paragraph 4.5.2 and 4.5.5 for details).

Card removal

To remove the card assembly, Þrst unlock it by pulling the ejector arms outward, then pull the card assembly out of the mainframe. Remember to handle the card assembly by the edges and shields to avoid contamination that could degrade performance.

2.3 Non-701X series cards

WARNING

Turn off power from all instrumentation (including the Model 7001 mainframe) and disconnect their line cords. Make sure all power is removed and stored energy in external circuitry is discharged.

NOTE

If using a card that requires connections to be made on the card, make sure your external circuitry is wired to the card (as explained in the instruction manual for the card) before installing the card in the Model 7001 mainframe.

CAUTION

To prevent contamination to the switch card that could degrade performance, only handle the card by the edges. If contamination occurs, clean the card as explained in its instruction manual.

Card installation

Perform the following steps to install the card in the Model 7001 mainframe:

1. Facing the rear panel of the Model 7001, select the slot (CARD 1 or CARD 2) that you wish to install the card in.

2. Using Figure 2-1 or Figure 2-2 as a guideline, feed the card into the desired slot such that the edges of the card ride in the rails.

3. With the ejector arms in the unlocked position, push the card assembly into the mainframe until the arms engage into the ejector cups. Then push both arms inward to lock the card into the mainframe.

2-2

Card Installation

NOTE

The Model 7001 cannot automatically identify non-701X cards. After the mainframe is powered up, you must enter the model number using the TYPE menu item in the CARD CONFIG MENU (see paragraph 3.5.3 in Getting Started).

Card removal

To remove the card, Þrst unlock it by pulling the ejector arms outward, then pull the card out of the mainframe. Remember to handle the card by the edges to avoid contamination that could degrade performance.

Ejector Arms (2)

Figure 2-1

Multi-pin card installation

Ejector Cup

Screw

2-3

Card Installation

Ejector Cup

Ejector Arms (2)

Figure 2-2

Screw terminal card installation

2-4

Getting Started

3.1 Introduction

This section contains introductory information on using your Model 7001 Switch System. For detailed front panel and IEEE-488 bus operation, refer to Sections 4 and 5 respectively.

The information in this section is arranged as follows:

3.2 Front and rear panel conﬁguration: Summarizes

the controls and display on the front panel of the instrument.

3.3 Operation demo: Demonstrates basic operation

using the built-in 40-channel multiplexer simulator. Recommended for ﬁrst time users.

3.4 Overview of scan process: Provides a brief over-

view of the scan process.

3.5 Initial conﬁguration: Goes over some initial con-

ﬁguration information that should be considered before operating the instrument.

3.6 Front panel operation: Demonstrates basic front

panel operation through the use of simple examples.

3.7 IEEE-488.2 and SCPI basics: Discusses funda-

mental information concerning operation over the IEEE-488 bus.

3.2 Front and rear panel conﬁgurations

3.2.1 Front panel controls

The front panel controls of the Model 7001 are shown in Figure 3-1. This ﬁgure includes important abbreviated information that should be reviewed before operating the instrument. Notice that some of the controls are dual-function, rocker-action type keys. These include SCAN/CARD CONFIGURATION, DELETE/INSERT, EXIT/ENTER and / .

3.2.2 Rear panel

The rear panel of the Model 7001 is shown in Figure 3-

2. This ﬁgure also includes important abbreviated

information that should be reviewed before operating the instrument.

3-1

Getting Started

1 2

INFO

LOCAL

POWER

4 5

INFO

Displays on-line help information. Press again (or EXIT) to cancel message.

LOCAL

Cancels remote, restores front panel control.

POWER

0 =off 1 = on

OPEN A LL

Opens all channels of both slots. Also, aborts a scan that is in progress and places 7001 in idle state.

SCAN L IST

Toggles between Scan List and Channel List

CLEA R LI ST

Clears the displayed Channel List or Scan List.

STEP

Takes 7001 out of idle state and steps through Scan List

1234567891012345678910

CARD 1 CARD 2

OPEN ALL

SCAN LIST

CLEAR LIST

STEP

MEMORY

STORE

RECALL

10 11

STORE

Stores channel pattern at a specified memory location.

RECALL

Restores 7001 to a channel pattern stored at a specified memory location.

OPE N

Opens the specified (displayed) channels in Channel List.

SCAN CONFIGURATION

Enables CONFIGURE SCAN MENU : CHAN-CONTROL SCAN-CONTROL ARM-CONTROL

CHAN-RESTRICTIONS

7001 SWITCH SYSTEM

OPEN

CONFIGURATION

SCAN CARD

DELETE INSERT

13 14

15 16

CA RD CON FI GURATI O N

Enables CARD CONFIG MENU : TYPE #-OF-POLES CARD-PAIR DELAY READ-I/O-CARD

Enables MAIN MENU: SAVESETUP GPIB DIGITAL-I/O TEST LANGUAGE

GENERAL

321

654

987

M0—

ENTEREXIT

Closes the specified (displayed) channels in Channel List.

DE LETE

Delete selected entry from Channel List or Scan List.

INSERT

Insert next entry at selected location in the Channel List or Scan List.

EXIT

Back up to previous menu selection, or exit from the menu.

ENTER

Execute the pending operation. Also, separate channels and terminate a Channel List or Scan List.

KEYPAD

0 - 9; use to enter numbers.

- ; use to specify a range of channels (i.e. 1!1 - 1!40). M ; use to precede a specified memory location number. ; use to move cursor left or ; use to move cursor right. Also, use to separate channels and terminate a Channel List on Scan List.

Figure 3-1

Model 7001 front panel

3-2

Getting Started

1 CARD 1

Slot 1 for switch card. Corresponds to Card 1 channel status display.

2 CARD 2

Slot 2 for switch card. Corresponds to Card 2 channel status display.

3 IEEE-488

CONNECTOR

Use standard IEEE-488 cables.

4 DIGITAL I/O

Micro 8-pin DIN connector. Port consists of four TTL output lines and one TTL input line (one common line).

Figure 3-2

Model 7001 rear panel

5 TRIGGER LINK IN AND

OUT

Two micro 8-pin DIN connectors.

6 CHANNEL READY

Female BNC connector for TTL output trigger pulse.

7 EXTERNAL TRIGGER

Female BNC connector for TTL input trigger pulse.

8 LINE POWER INPUT

WARNING: Connect to grounded outlet using three-wire power cord.

3-3

Getting Started

3.2.3 Channel status display

The channel status display provides real-time status of each available channel for the two slots. Only the available channels are displayed. There are two channel status display modes; the Channel List entry mode (SELECT CHANNELS) and the Scan List entry mode (SCAN CHANNELS). On power-up, the Channel List entry mode is selected. The SCAN LIST key toggles between the Channel List and the Scan List. The instrument can be returned to the channel status display by pressing the EXIT key one or more times.

The channel status display is shown in Figure 3-3. This display is structured as two 10-column grids. The left grid provides the channel status of the card installed in slot 1 (CARD 1) and the right grid provides the channel status of the card installed in slot 2 (CARD 2). As shown in the illustration, an open channel is represented as a “dot” while a closed channel is represented as a “dash”.

Channel assignments

mat is automatically determined by the card type. There is a three-integer format to express matrix card channels, and a two-integer format to express channels for all other types of switching cards. The individual integers that make up the channel assignment are separated by an exclamation point (!).



The channel assignment for-

is Row 1, the second row from the top is Row 2, the next row is Row 3, and the bottom row is Row

4. The third integer designates the column of the matrix card. The 10 matrix columns are displayed by the channel status display. The assignments for all matrix card channels are presented in Figure 3-4.

If, for example, CARD 1 in Figure 3-3 happened to be a Model 7012 matrix card, the following channels would be closed:

Channel 1!2!3 (Slot 1, Row 2, Column 3)

Channel 1!4!9 (Slot 1, Row 4, Column 9)

All other card types: All non-matrix type switch-

ing cards use the two-integer format to express channel assignments. The ﬁrst integer, like the matrix card, designates the slot number. The second integer designates switch card channel number. The channel assignments for these card types are presented in Figure 3-5.

If, for example, CARD 2 in Figure 3-3 happened to be a Model 7011 multiplexer card, the following channels would be closed:

Channel 2!14 (Slot 2, Channel 14)

Matrix cards: Matrix cards use the three-integer

format to express channel assignments. The ﬁrst integer designates the slot number that the card is installed in. Thus, a “1” designates slot 1 (CARD 1), and a “2” designates slot 2 (CARD 2). The second integer designates the row number of the matrix card. There are four rows; the top row

3-4

Channel 2!36 (Slot 2, Channel 36)

For the Model 7011 multiplexer card, Channel 14 corresponds to Bank 1, Relay 4, and Channel 36 corresponds to Bank 3, Relay 6. See the Model 7011 instruction manual for details.

CARD 1 CARD 2

Getting Started

1 23

= Open Channel = Closed Channel

Figure 3-3

Channel status display

1 2 3 4 5 6 7 8 9 10

1!1!1

1!2!1

1!3!1

1!4!1

REM4TALK

1!1!2

1!2!2

1!3!2

1!4!2

LSTN7SRQ

1!1!3

1!2!3

1!3!3

1!4!3

89101234567

Channel 2!36 for Mux Channel 2!4!6 for Matrix

1!1!4

1!2!4

1!3!4

1!4!4

1!1!5

1!2!5

1!3!5

1!4!5

1!1!6

1!2!6

1!3!6

1!4!6

1!1!7

1!2!7

1!3!7

1!4!7

1!1!8

1!2!8

1!3!8

1!4!8

1!1!9

1!2!9

1!3!9

1!4!9

ARM

8910

1!1!10

1!2!10

1!3!10

1!4!10

A. Slot 1 (Card 1)

1 2 3 4 5 6 7 8 9 10

2!1!1

2!2!1

2!3!1

2!4!1

2!1!2

2!2!2

2!3!2

2!4!2

B. Slot 2 (Card 2)

Exampels : 1!2!4 = Slot 1, Row 2, Column 4 2!3!6 = Slot 2, Row 3, Column 6

Figure 3-4

Channel assignments (matrix cards)

2!1!3

2!2!3

2!3!3

2!4!3

2!1!4

2!2!4

2!3!4

2!4!4

2!1!5

2!2!5

2!3!5

2!4!5

2!1!6

2!2!6

2!3!6

2!4!6

2!1!7

2!2!7

2!3!7

2!4!7

2!1!8

2!2!8

2!3!8

2!4!8

2!1!9

2!2!9

2!3!9

2!4!9

2!1!10

2!2!10

2!3!10

2!4!10

3-5

Getting Started

1 2 3 4 5 6 7 8 9 10

1!1

1!2

1!3

1!4

1!5

1!6

1!7

1!8

1!9

1!10

1!11

1!21

1!31

1!12

1!22

1!32

1!13

1!23

1!33

1!14

1!24

1!34

1!15

1!25

1!35

1!16

1!26

1!36

1!17

1!27

1!37

1!18

1!28

1!38

1!19

1!29

1!39

A. Slot 1 (Card 1)

1 2 3 4 5 6 7 8 9 10

2!1

2!11

2!21

2!31

2!2

2!12

2!22

2!32

2!3

2!13

2!23

2!33

2!4

2!14

2!24

2!34

2!5

2!15

2!25

2!35

2!6

2!16

2!26

2!36

2!7

2!17

2!27

2!37

2!8

2!18

2!28

2!38

2!9

2!19

2!29

2!39

B. Slot 2 (Card 2)

1!20

1!30

1!40

2!10

2!20

2!30

2!40

Exampels : 1!18 = Slot 1, Channel 18 2!36 = Slot 2, Channel 36

Figure 3-5

Channel assignments (non-matrix type cards)

3-6

Getting Started

3.3 Operation demo

A fast and easy way to acquaint yourself with basic front panel operation is to use the following operation demo. This demo uses the built-in 40-channel multiplexer simulator. This will allow you to simulate operation without the need of a switching card.

3.3.1 Initial conﬁguration

WARNING

Before turning the Model 7001 on, make sure it is connected to a grounded power receptacle using the supplied power cord or the equivalent. Failure to properly ground the unit creates a shock hazard that could result in injury or death.

Step 1 of the following procedure will RESET the Model 7001 to a default scan conﬁguration that is required for the demonstration procedures (paragraphs 3.3.2 and 3.3.3). Step 2 will assign the 40-channel multiplexer simulator to slot 2.

1. Press the CARD CONFIGURATION key. The CARD CONFIG MENU will be displayed.

2. Place the cursor on TYPE and press ENTER. The SET CARD TYPE menu will be displayed.

3. Place the cursor on SLOT-2 and press ENTER. The “SLOT-2 CARD: XXXX” message will be displayed (where XXXX is the current card assignment for slot 2).

4. Use the cursor keys to display model number “9990”.

5. With “SLOT-2 CARD: 9990” displayed, press ENTER. The SET CARD TYPE menu will be displayed.

6. Press EXIT twice to exit from the CARD CONFIG MENU.

3.3.2 Close and open channels

The following procedures assume that the initial conﬁguration procedure in paragraph 3.3.1 has been performed. This initialization will assign the 40-channel multiplexer simulator to Slot 2 for the following operating examples.

Step 1. RESET instrument

1. Press the MENU key. The MAIN MENU will be displayed.

2. Place the cursor on SAVESETUP using the and

cursor keys, and press the ENTER key. The

SETUP MENU will be displayed.

3. Place the cursor on RESET and press ENTER. The “RESETTING INSTRUMENT” message will be displayed.

4. Press ENTER again. The “RESET COMPLETE” message will be displayed.

5. Press ENTER to return the display to the SETUP MENU.

6. Press EXIT twice to exit from the MAIN MENU.

Step 2. select multiplexer simulator

NOTE

The simulator cannot be selected if there is a Model 701X series card installed in slot 2.

NOTE

The Model 7001 must be in the Channel List display mode (“SELECT CHANNELS” prompt displayed). The SCAN LIST key toggles the channel status display between “SELECT CHANNELS” (Channel List) and “SCAN CHANNELS” (Scan List). If the instrument is not in the channel status display mode, press EXIT until it is.

Create Channel List:

The Channel List speciﬁes which channels you wish to close and open. The Channel List can be made up of a single channel, or multiple channels. Consecutive channels can be speciﬁed as a range.

The following procedure will create a Channel List that includes Channels 1, 2, and 6 through 9:

3-7

Getting Started

1. If the Channel List is not currently empty, press CLEAR LIST. The following message indicates an empty Channel List:

SELECT CHANNELS

2. Individual Channel Entry - Perform the following steps to enter Channels 1 and 2 in the Channel List:

A. Press “2” and then “1” to enter Channel 1 into

the Channel List. The “2” selects slot 2.

SELECT CHANNELS 2!1

B. Press or ENTER to enter the channel sepa-

rator (,).

SELECT CHANNELS 2!1,

C. Press “2” and then “2” to enter channel 2, and

then press or ENTER to enter the channel separator (,).

SELECT CHANNELS 2!1, 2!2,

3.3.3 Scan channels

NOTE

The Model 7001 must be in the Scan List display mode (“SCAN CHANNELS” prompt displayed). The SCAN LIST key toggles the channel status display between “SELECT CHANNELS” (Channel List) and “SCAN CHANNELS” (Scan List). If the instrument is not in the channel status display mode, press EXIT until it is.

Create scan list

Perform the following steps to create a scan list that will scan channels 1 through 20:

3. Range Entry - Perform the following steps to enter Channels 6 through 9 as a range:

A. Press “2” and then “6” to enter the range limit

(Channel 6).

SELECT CHANNELS 2!1, 2!2, 2!6

B. Press “-” to enter the range separator. Note that

the slot number for the next channel is automatically entered.

SELECT CHANNELS 2!1, 2!2, 2!6-2!

C. Press “9” to enter the range limit.

SELECT CHANNELS 2!1, 2!2, 2!6-2!9

Close and open channels

1. Press CLOSE to close the channels speciﬁed in the Channel List.

2. Press OPEN to open the channels speciﬁed in the Channel List. Note that OPEN ALL opens all channels (even those not speciﬁed in the Channel List).

1. If the Scan List is not currently empty, press CLEAR LIST. The following message indicates an empty Scan List:

SCAN CHANNELS

2. Press “2” and then “1” to enter the slot and the range limit.

SCAN CHANNELS 2!1

3. Press “-” to enter the separator for the range limits. Notice that the slot number for the next channel will automatically be entered.

SCAN CHANNELS 2!1-2!

4. Press “2” and then “0” to enter the limit of the range.

SCAN CHANNELS 2!1-2!20

5. Press or ENTER to enter the scan list terminator (,).

SCAN CHANNELS 2!1-2!20,

3-8

Getting Started

Note: Instead of specifying the 20 channels in the scan list as a range, they could have been entered individu-

ally (2!1, 2!2, 2!3, .... 2!20,).

Manual scan

The RESET defaults conﬁgure the instrument to manually scan an inﬁnite number of channels. After the 20th channel is scanned, operation will wrap around to the beginning of the scan list (Channel 1).

1. Press STEP to take the Model 7001 out of the idle state. The ARM indicator will turn on.

2. Press the STEP key to scan the ﬁrst channel. This channel will remain closed until another channel is scanned.

3. Press the STEP key to scan the second channel. The ﬁrst channel will open and the second channel will close.

4. Each press of the STEP key will open the previous channel and close the next channel (break-beforemake).

5. When ﬁnished, press OPEN ALL to abort the scan and open all channels. The instrument goes into the idle state (ARM indicator turns off).

4. Place the cursor on CHANNEL-SPACING and press ENTER. The SELECT CHAN SPACING menu will be displayed.

SELECT CHAN SPACING

TRIGLINK IMMEDIATE HOLD

5. Place the cursor on IMMEDIATE and press ENTER. The display will return to the CHANNEL CONTROL menu.

6. Press EXIT twice to exit from the CONFIGURE SCAN menu and return to the channel status display.

7. Press CARD CONFIGURATION. The CARD CONFIG MENU will be displayed.

CARD CONFIG MENU

DELAY READ-I/O-CARD

8. Place the cursor on DELAY and press ENTER. The SET DELAY FOR: menu will be displayed.

9. Place the cursor on SLOT-2 and press ENTER. The delay period (in seconds) will be displayed.

(2)DELAY = 00000.000

Automatic scan

Perform the following steps to automate the 20-channel scan. A 0.5 second delay will be used between each channel.

1. Press OPEN ALL if there are any channels closed or the ARM indicator is on

2. Press the SCAN CONFIGURATION key. The CONFIGURE SCAN menu will be displayed.

NOTE

Due to space limitations, not all menu selections can be displayed on the Model 7001 at the same time. A displayed arrow ( or ) indicates that there are additional menu selections to choose from. Use the and

cursor keys to display them.

3. Using the and keys, place the cursor on CHAN-CONTROL and press ENTER. The CHANNEL CONTROL menu will be displayed.

10. Use the keypad to set the delay for 0.5 seconds.

(2)DELAY = 00000.500

This delay will occur after each channel closes.

11. Press ENTER. The display will return to the SET DELAY FOR: menu.

12. Press EXIT twice to return to the channel status display.

13. To start the scan, simply press STEP. The instrument leaves the idle state (ARM indicator on) and immediately closes the ﬁrst channel. After a 0.5 second delay the ﬁrst channel will open and the second channel will close. This automatic scan will continue at the 0.5 second scan rate.

14. When ﬁnished, press OPEN ALL.

TIMER controlled scans

An internal timer can be used to control the time interval between the scans. The 20-channel scan will be modiﬁed by using a TIMER to place a 20-second interval between the start of each scan.

3-9

Getting Started

1. Press OPEN ALL to ensure that the instrument is in the idle state.

2. Press SCAN CONFIGURATION. The CONFIGURE SCAN menu will be displayed.

3. Place the cursor on SCAN-CONTROL and press ENTER. The SCAN CONTROL menu will be displayed.

4. Place the cursor on SCAN-SPACING and press ENTER. The SELECT SCAN SPACING menu will be displayed.

SELECT SCAN SPACING

TIMER EXTERNAL GPIB MANUAL

5. Place the cursor on TIMER and press ENTER. The timer interval (in seconds) will be displayed.

INTERVAL = 00000.001

6. Use the keypad to key in an interval of 20 seconds.

INTERVAL = 00020.000

Arm

Layer

Scan

Layer

Channel

Layer

Idle

Arm

Event

Scan

Event

Channel

Event

Yes

Scan

Channel

Another

Arm

Another

Scan

Another

Channel

Arm

Count

Number of

Scans

Number of

Channels

7. Press ENTER. The display will return to the SCAN CONTROL menu.

8. Press EXIT twice to exit from the CONFIGURE SCAN menu and return to the channel status display.

9. To start the scan, press STEP. The ﬁrst scan will start immediately and stop after the 20th channel closes. After 10 additional seconds expires (20 seconds after the start of the scan), the next scan will start.

10. When ﬁnished, press OPEN ALL.

3.4 Overview of scan process

The following overview is intended to acquaint you with the basic scan fundamentals without overwhelming you with the details of enhanced capabilities. This brief overview is sufﬁcient to support the operation examples in paragraphs 3.5 (front panel) and 3.6 (IEEE488 bus). For a complete explanation on all aspects of the scan process, see paragraph 4.5.4.

The simpliﬁed model for scan operation is shown in Figure 3-6. As shown, scan operation consists of three layers; the arm layer, scan layer and channel layer.

Figure 3-6

Simpliﬁed model of scan operation

Idle

The instrument is considered to be in the idle state whenever it is not operating within one of the layers of the model. The front panel ARM indicator is off when the instrument is in the idle state.

When the Model 7001 is taken out of the idle state by pressing STEP (or sending the :INIT or :INIT:CONT ON command over the IEEE-488 bus), the ARM indicator turns on and operation proceeds into the arm layer.

Arm layer

In general, the instrument requires an arm event to allow operation to proceed to the scan layer. With Immediate arm spacing selected, operation immediately proceeds to the next layer when the instrument is taken out of the idle state. With one of the other arm spacing events selected, the instrument will wait until the appropriate event occurs.

3-10

Getting Started

With Manual arm spacing selected, the instrument will wait until the front panel STEP key is pressed. With GPIB arm spacing selected, the instrument will wait until a bus trigger (GET or *TRG) is received. With External arm spacing selected, the instrument will wait until an input trigger (via EXTERNAL TRIGGER connector on rear panel) is received. With Trigger Link arm spacing selected, the instrument will wait until an input trigger is received (via TRIGGER LINK).

After all other scanning operations are completed, the instrument can be returned to the arm layer by programming the instrument for additional arms. The arm count can be set to a ﬁnite value (1 to 9999) or to inﬁnity.

After the instrument leaves the arm layer, operation proceeds into the scan layer.

Scan layer

In general, the instrument requires a scan event to allow operation to proceed to the channel layer. With Immediate scan spacing selected, operation immediately proceeds to the next layer. With one of the trigger scan spacing events selected (Timer, External, GPIB, Manual, Trigger Link), the instrument will wait until the appropriate event occurs. With Timer scan spacing selected, the ﬁrst pass through the scan layer will occur immediately. If programmed for additional scans, the instrument will wait until the Timer times out. The Timer can be set for an interval from 1msec to

99999.999 seconds.

nel. With Timer channel spacing selected, the ﬁrst channel will be scanned immediately. Each additional channel will wait for the Timer to time out before it will be scanned.

Typically, the channel count (number of channels to scan) is set to the number of channels that are contained in the Scan List (scan-list-length). However, the channel count can be set to a ﬁnite value (1 to 9999) or to inﬁnity.

3.5 Initial conﬁguration

WARNING

Before performing any basic operations (close/open channels or scan channels) there are a few initial conﬁgurations that must ﬁrst be considered. If you are using Model 701X series cards (i.e. Model 7011, 7012 and

7013), and they are already installed in the mainframe (as explained in Section 2), skip the following conﬁguration information and proceed to paragraphs 3.5 (front panel operation) and 3.6 (IEEE-488 bus operation).

The scan count (number of scans) can be set to a ﬁnite value (1 to 9999) or for an inﬁnite number of scans.

After the instrument leaves the scan layer, operation proceeds into the channel layer.

Channel layer

In general, channel events control the channel scan rate. With Immediate channel spacing selected, a channel will be scanned immediately. With one of the other channel spacing events selected (Timer, External, GPIB, Manual or Trigger Link), the instrument will wait until the appropriate event occurs before scanning a chan-

3.5.1 Switching card simulators

Instrument operation can be performed without any switching cards installed in the Model 7001 by using the switching card simulators. By selecting the appropriate switching card simulator, the Model 7001 will operate as if a 40-channel switching card or a 4 trix card were installed. This is useful if you want to develop a test program without having a card installed.

When a slot is assigned the model number 9990, the mainframe will operate as if a 40-channel switching card is installed. When a slot is assigned model number 9991, the mainframe will operate as if a 4

10 ma-

10 matrix

3-11

Getting Started

card is installed. These simulator model numbers are assigned by setting card TYPE in the CARD CONFIG MENU (see paragraph 3.5.3). If you are going to use the simulators to perform the operating examples in paragraph 3.6, conﬁgure Slot 1 for non-matrix switching (model 9990), and Slot 2 for matrix switching (model

9991).

NOTE

A simulator cannot be assigned to a slot that already has a Model 701X series card installed in it. To use a simulator, turn off the Model 7001 and remove the card from the slot.

3.5.2 Installing switching cards

The procedure to install switching cards in the mainframe is explained in Section 2 of this manual. If using switching card simulators as explained in the previous paragraph, leave the slots empty.

Perform the following procedure to assign a model number (or designate it as empty) to one or both of the mainframe slots:

1. Turn on the Model 7001. During the power-up sequence, the instrument will brieﬂy display which Model 701X series cards are currently installed, or the last slot assignments.

Example 1, and slot 2 was last designated to be empty, the following message will be displayed brieﬂy during the power-up sequence:

If slot 2 is empty and you do not wish to assign it a simulator, stop here and proceed to basic front panel operation (paragraph 3.5). If slot 2 has a non701X series card (i.e. Model 7156) installed in it, continue with this procedure to assign the appropriate model number to the slot.

2. Press CARD CONFIGURATION to enable the following menu:



If a Model 7013 card is installed in slot

#1 = 7013 #2 = NONE

3.5.3 Card type

In order for the Model 7001 to operate properly, it must know what type of card is installed in each of its two slots. If a Model 701X series card (such as the Model 7011, 7012 or 7013) is installed in a slot, the mainframe automatically identiﬁes the card type on power-up and conﬁgures its operation appropriately. With Model 701X series cards installed in the mainframe, you can disregard the procedure in this paragraph and proceed on to basic front panel operation (paragraph 3.5).

For other card types (non-701X series cards) and simulators, the user must assign the proper model number to the slot. Once a model number is assigned by the user, it will be remembered on subsequent power-ups as long as a Model 701X series card is not installed. Note that a slot can also be designated as empty. With this assignment, the front panel status display for that slot will be disabled.

A slot assignment change could make a channel that is currently included in the Scan List and/or a Channel Pattern unavailable. The unavailable channel causes the Scan List and/or the affected Channel Pattern to clear (see paragraphs 4.5.2 and 4.5.5 for details).

CARD CONFIG MENU

TYPE #-OF-POLES CARD-PAIR

DELAY READ-I/O-CARD

NOTE

A displayed arrow ( or ) indicates that more menu selections are available. Use the cursor keys ( and

) to display them.

3. Using the and cursor keys, place the cursor (ﬂashing menu item) on TYPE and press ENTER. The following menu will be displayed:

SET CARD TYPE

SLOT-1 SLOT-2

4. Place the cursor on the slot that needs to be assigned and press ENTER. For example, if you selected Slot 1, the following typical message will be displayed:

SLOT-1 CARD: NONE

The above message indicates that there is not a Model 701X series card installed in slot 1, and slot 1 was last designated as an empty slot.

3-12

Getting Started

5. Perform one of the following steps: A. Empty Slot

empty, use the cursor keys ( and ) to display the “NONE” message. Example:

SLOT-1 CARD: NONE

The above message indicates that, when ENTERed (Step 6), slot 1 will be conﬁgured to operate as an empty slot.

B. Simulator

40- channel switching card, use the cursor keys ( and ) to display model number 9990. If you want the slot to simulate a 4 card, use the cursor keys to display model number 9991. Example:

SLOT-1 CARD: 9990

The above message indicates that, when ENTERed (Step 6), slot 1 will be conﬁgured to operate as a 40-channel switching card.

C. Non-701X Series Card

the non-701X series card, use the cursor keys ( and ) to display the model number of that card. For example, if a Model 7156 is installed in slot 1, use the cursor keys to display the following message:

SLOT-1 CARD: 7156



If you want to assign the slot as



If you want the slot to simulate a



To assign the slot to

10 matrix

3.6 Front panel operation

Basic front panel operation will be demonstrated through the use of examples. One example demonstrates close/open operation and the other example demonstrates scanning. These examples are only intended to teach basic operation. Complete details for using the full capabilities of the Model 7001 from the front panel are contained in Section 4 of this manual.

NOTE

Operation examples assume that the Model 7001 is initially conﬁgured for proper operation as explained in paragraph 3.5.

3.6.1 Close/open operation example

One of the basic functions of the Model 7001 is to simply close and open one or more speciﬁed channels. The following example will demonstrate this operation.

The example can be performed if you have a non-matrix switching card installed and/or a matrix card installed. If using the card simulators, conﬁgure slot 1 for non-matrix switching (model 9990) and slot 2 for matrix switching (model 9991) as explained in paragraph

3.5.3.

The above message indicates that, when ENTERed (Step 6), slot 1 will operate properly with a Model 7156 installed in it.

6. With the appropriate slot assignment message displayed, press ENTER to execute the assignment. The display will return to the SET CARD TYPE menu.

7. To assign the other slot, repeat steps 4 through 6.

8. To exit from the CARD CONFIG MENU, press EXIT twice.

NOTE

The EXIT key can be used anywhere in the CARD CONFIG MENU structure. Each press of the EXIT key will back up the display to the previous menu level without executing a pending operation.

Channels that are controlled in this example include:

Switching Card Channels: 1, 3, 4, 5 and 6.

Matrix Card Channels: Row 1 Column 1, Row 2 Column 2, Row 2 Column 3, Row 2 Column 4, Row 2 Column 5 and Row 2 Column 6

Perform the following steps to close/open channels of a non-matrix switching card and/or a matrix card.

Step 1. Place instrument in Channel List display state.

If not already in the channel status display state, press EXIT one or more times. Once in the channel status display state, the SCAN KEY will toggle between the Channel List (SELECT CHANNELS) and the Scan List (SCAN CHANNELS).

3-13

Getting Started

SELECT CHANNELS

If there is Channel List currently displayed, press CLEAR LIST to cancel it. Also, if there are any channels currently closed, press OPEN ALL to open them.

Step 2. Enter Channel List.

Switching Card  For a non-matrix switching card,

enter the Channel List (Channels 1, 3, 4, 5 and 6) for slot 1 as follows:

NOTE

The following procedure assumes that slot 1 is conﬁgured for non-matrix switching. If using slot 2 for non-matrix switching, modify (A) of steps 1 and 2 by pressing “2” instead of “1”.

1. Enter ﬁrst channel (Channel 1) using the single channel entry method:

A. Press “1” Enters slot B. Press “1” Enters channel C. Press “ ” or “ENTER” Enters channel sepa-

rator (comma)

Note: The following procedure assumes that Slot 2 is conﬁgured for a matrix. If using slot 1 for a matrix, modify (A) of steps 1 and 2 by pressing “1” instead of “2” to enter the slot.

1. Enter ﬁrst channel (Row 1 Column 1) using the single channel entry method:

A. Press “2” Enters slot B. Press “1” Enters row C. Press “1” Enters column D. Press “ ” or “ENTER” Enters channel sepa-

rator (comma)

SELECT CHANNELS 2!1!1,

2. Enter the rest of the channels (Row 2 Column 2 through Row 2 Column 5) using the channel range entry method:

A. Press “2” Enters slot B. Press “2” Enters row of ﬁrst channel C. Press “2” Enters column of ﬁrst chan-

nel D. Press “-” Enters range designator E. Press “2” Enters row of last channel F. Press “5” Enters column of last channel G. Press “ ” or Enters channel list terminator

“ENTER” (comma)

SELECT CHANNELS 1!1,

2. Enter the rest of the channels (Channels 3 through

6) using the channel range entry method: A. Press “1” Enters slot B. Press “3” Enters ﬁrst channel C. Press “-” Enters range designator

and slot D. Press “6” Enters last channel E. Press “ ” or Enters channel list termi-

“ENTER” nator (comma)

SELECT CHANNELS 1!1, 1!3-1!6,

Note: Channels 3, 4, 5, and 6 could have been entered using the single channel entry method demonstrated in step 1.

Matrix card  For a matrix card, enter the Channel List

(Row 1 Column 1,Row 2 Column 2, Row 2 Column 3, Row 2 Column 4, and Row 2 Column 5 for slot 2) as follows:

SELECT CHANNELS 2!1!1, 2!2!2-2!2!5,

Note: The single channel entry method demonstrated in step 1 could have been used to enter the channels for row 2.

Step 3. Close (or open) listed channels.

1. To close the channels speciﬁed in the channel list, simply press CLOSE. The closed channels will be indicated on the channel status display.

2. To open the closed channels that are speciﬁed in the channel list, press OPEN. Note that only channels speciﬁed in the list are opened. Unspeciﬁed channels (as well as channels in the channel list) are opened by pressing OPEN ALL.

Closing additional channels

After you have closed the channels in channel list, you may want to close one or more additional channels. Closing an additional channel is simply a matter of en-

3-14

Getting Started

tering the channel in the channel list and pressing “CLOSE”. For example, assume your channel list looks like this:

SELECT CHANNELS 1!1, 1!3-1!6,

To close channel 1!8, position the cursor at the end of the channel list and press “1”, “8” and then CLOSE. The channel list will now look like this:

SELECT CHANNELS 1!1, 1!3-1!6, 1!8,

You could also have closed the additional channel by ﬁrst clearing the channel list (pressing CLEAR LIST), and then entering and closing the channel. However, keep in mind that once you clear a channel list, it cannot be recalled. You will have to re-enter the entire list.

Opening closed channels

As previously explained, pressing OPEN will open all the channels speciﬁed in the channel list. If you want to open one or more, but not all channels, you will have to clear the channel list by pressing CLEAR LIST, and then enter a new channel list that speciﬁes the closed channels you wish to open. Once the new channel list is entered, simply press OPEN to open those channels.

Perform the following steps to scan channels of a nonmatrix switching card and/or a matrix card. Three scans of the speciﬁed Scan List will be performed.

Step 1. RESET the Model 7001.

By performing RESET, the Model 7001 will set itself to default conditions that are typically used to control a scan.

1. Press the MENU key. The following menu will be displayed:

MAIN MENU

SAVESETUP GPIB DIGITAL-I/O

TEST LANGUAGE GENERAL

2. Use the cursor keys ( and ) to place the cursor (ﬂashing menu item) on SAVESETUP and press the ENTER key. The following menu will be displayed:

SETUP MENU

SAVE RESTORE PWRON RESET

3. Place the cursor on RESET and press ENTER. The following message will be displayed;

3.6.2 Scan operation example

The Model 7001 can scan through a list of speciﬁed channels. The order of the channels in the Scan List determines the channel order for the scan. The following example will demonstrate this operation.

The example can be performed if you have a non-matrix switching card installed and/or a matrix card installed. If using the card simulators, conﬁgure slot 1 for non-matrix switching (model 9990), and slot 2 for matrix switching (model 9991) as explained in paragraph

3.4.3.

Channels that are scanned in this example include:

Switching Card Channels: 1, 3, 4, 5, and 6.

Matrix Card Channels: Row 1 Column 1, Row 2 Column 2, Row 2 Column 3, Row 2 Column 4, Row 2 Column 5 and Row 2 Column 6.

RESETTING INSTRUMENT

4. Press ENTER. The following message will be displayed:

RESET COMPLETE

5. Again press ENTER to return to the SETUP MENU.

6. Press EXIT twice to exit from the menu structure.

Step 2. Place instrument in Scan List display state.

With the instrument in the Channel List display state, press SCAN LIST to select the Scan List entry display state. The following message prompt will be displayed:

SCAN CHANNELS

If there is a scan list currently displayed, press CLEAR LIST to cancel it. Also, if there are any channels currently closed, press OPEN ALL to open them.

3-15

Getting Started

Step 3. Enter Scan List.

Switching Card  For a non-matrix switching card,

enter the scan list (Channels 1, 3, 4, 5, and 6) for slot 1 as follows:

Note: The following procedure assumes that slot 1 is conﬁgured for non-matrix switching. If using slot 2 for non-matrix switching, modify (A) of steps 1 and 2 by pressing “2” instead of “1”.

1. Enter ﬁrst channel (Channel 1) using the single channel entry method:

A. Press “1” Enters slot B. Press “1” Enters channel C. Press “ ” or “ENTER” Enters channel sepa-

rator (comma)

SCAN CHANNELS 1!1,

2. Enter the rest of the channels (Channels 3 through

6) using the channel range entry method: A. Press “1” Enters slot B. Press “3” Enters ﬁrst channel C. Press “-” Enters range designator and

slot D. Press “6” Enters last channel E. Press “ ” or Enters channel list terminator

“ENTER” (comma)

SCAN CHANNELS 1!1, 1!3-1!6,

Note: Channels 3, 4, 5 and 6 could have been entered using the single channel entry method demonstrated in step 1.

Matrix Card  For a matrix card, enter the scan list

(Row 1 Column 1, Row 2 Column 2, Row 2 Column 3, Row 2 Column 4, and Row 2 Column 5 for slot 2) as follows:

Note: The following procedure assumes that slot 2 is conﬁgured for a matrix. If using slot 1 for a matrix, modify (A) of steps 1 and 2 by pressing “1” instead of “2”.

1. Enter ﬁrst channel (Row 1 Column 1) using the single channel entry method:

A. Press “2” Enters slot

B. Press “1” Enters row C. Press “1” Enters column D. Press “ ” or Enters channel separa-

“ENTER” tor (comma)

SCAN CHANNELS 2!1!1,

2. Enter the rest of the channels (Row 2 Column 2 through Row 2 Column 5)using the channel range entry method:

A. Press “2” Enters slot B. Press “2” Enters row of ﬁrst channel C. Press “2” Enters column of ﬁrst chan-

nel

D. Press “-” Enters range designator and

slot E. Press “2” Enters row of last channel F. Press “5” Enters column of last channel G. Press “ ” or Enters channel list terminator

“ENTER” (comma)

SCAN CHANNELS 2!1!1, 2!2!2-2!2!5,

Note: The single channel entry method demonstrated in step 1 could have been used to enter the channels for row 2.

Step 4. Conﬁgure channel layer of scan.

NOTE

When RESET was performed (Step 1), the channel layer was reset to MANUAL channel scanning. In MANUAL, the ﬁrst press of STEP will take the instrument out of the idle state and each subsequent press will manually step through the scan. Go ahead and try it. When ﬁnished, press OPEN ALL to place the Model 7001 in the idle state.

For this example, the channel scan rate will be controlled by the timer. In general, every time the timer times out, the next channel in the scan will be selected.

Since the Model 7001 was RESET, only CHANNEL SPACING needs to be programmed.

Conﬁgure the channel layer as follows:

3-16

Getting Started

1. Press SCAN CONFIGURATION to display the following menu:

CONFIGURE SCAN

CHAN-CONTROL SCAN-CONTROL

ARM-CONTROL CHAN-RESTRICTIONS

2. Using the cursor keys ( and ), place the cursor on CHAN-CONTROL (Channel Layer) and press ENTER. The following menu will be displayed:

CHANNEL CONTROL

CHANNEL-SPACING NUMBER-OF-CHANS

CONTROL

3. Place the cursor on CHAN-SPACING and press ENTER. The following menu will be displayed:

SELECT CHAN SPACING

TIMER EXTERNAL GPIB MANUAL

TRIGLINK IMMEDIATE HOLD

4. Place the cursor on TIMER and press ENTER. The current timer interval (in seconds) will be displayed:

Step 5. Conﬁgure scan layer of scan.

When the Model 7001 was RESET (Step 1), the scan layer was reset to IMMEDIATE scan spacing, which is appropriate for this example. This means each programmed scan will occur immediately and not wait for an event to occur.

Also, the scan layer was RESET to perform an inﬁnite number of scans. Since this example requires only three scans, change the NUMBER OF SCANS as follows:

1. The Model 7001 should be displaying the following menu:

CONFIGURE SCAN

CHAN-CONTROL SCAN-CONTROL

ARM-CONTROL CHAN-RESTRICTIONS

2. Place the cursor on SCAN-CONTROL and press ENTER. The following menu will be displayed:

SCAN CONTROL

SCAN-SPACING NUMBER-OF-SCANS

CONTROL

INTERVAL = 00000.001

The above message indicates that the timer is currently set for 1msec.

5. Set the timer for a half second interval by using the cursor keys and number keys. The timer interval should look like this:

INTERVAL = 00000.500

6. Press ENTER to select the timer as the event that controls the channel scan. The display returns to the following menu:

CHANNEL CONTROL

CHANNEL-SPACING NUMBER-OF-CHANS

CONTROL

Note: When the Model 7001 was RESET, the number of channels to scan was set to the scan list length, which is what you want for this example.

7. Press EXIT to return the display to the CONFIGURE SCAN menu.

3. Place the cursor on NUMBER-OF-SCANS and press ENTER. The following menu will be displayed:

NUMBER OF SCANS

INFINITE ENTER-SCAN-COUNT

4. Place the cursor on ENTER-SCAN-COUNT and press ENTER. The following typical message indicating the scan count will be displayed:

SCAN COUNT = 0000

A scan count of zero indicates that the scan layer is currently conﬁgured for an inﬁnite number of scans.

5. Key in a scan count of 3.

SCAN COUNT = 0003

6. To conﬁgure the instrument for three scans, press ENTER. The display will return to the SCAN CONTROL menu.

7. Press EXIT twice to exit from the menu structure.

3-17

Getting Started

Note: RESET (Step 1) configured the arm layer for IMMEDIATE arming, and for an arm count of one. Both of these arm conditions are appropriate for this example. Thus, arm layer conﬁguration is not necessary.

Step 6. Perform the scan.

To perform the scan, simply press the STEP key. On the display, the scan will arm (ARM indicator will turn on), and the mainframe will scan through the channels of the scan list three times. At the conclusion of the third scan, the Model 7001 will return to the idle state (ARM indicator will turn off). Note however that the last channel in the scan list remains closed.

NOTE

The last channel in the scan remains closed. If your test requires that the last channel open after the scan, proceed to the next step.

Step 7. Open the last channel

To have the last channel open at the conclusion of the third scan, you will need to assign a blank channel pattern (all channels open) from memory as the last channel entry in the Scan List.

2. Use the cursor key to position the cursor at the end of the scan list.

3. Enter the blank channel pattern by pressing “M”, “1” and then or ENTER to terminate the Scan List.

SCAN CHANNELS 1!1, 1!3-1!6, 2!1!1, 2!2!2-2!2!5, M1,

Repeat the scans by again pressing STEP. At the conclusion of the third scan, the last channel (Channel 2!2!5, if using the scan list above), will open.

3.7 IEEE-488.2 and SCPI basics

The following paragraphs discuss fundamental information concerning operation over the IEEE-488 bus. Detailed information on operating the instrument from over the bus is contained in Section 5 of this manual.

SCPI overview

IEEE-488.2 deﬁnes a syntax for sending data to and from instruments. It also deﬁnes a set of Common Commands that are used to perform basic operations such as reading status registers, providing triggers and resetting the instrument to default conditions.

To save a blank channel pattern in memory, perform the following steps:

1. Display the Channel List (SELECT CHANNELS) and press OPEN ALL to open all channels.

2. Press STORE. The following typical message will be displayed:

STORE CHANS AT #001

3. To store the blank channel pattern in memory location 1, press ENTER. Note that the blank channel pattern could have been stored at any one of the 100 memory locations (1 to 100) by keying in the desired value and then pressing ENTER.

With a blank channel pattern stored at memory location 1 (M1), add it to your Scan List as follows:

1. Display the scan list (press SCAN LIST if necessary).

SCPI (Standard Commands for Programmable Instruments) deﬁnes a standard set of commands (and format) to control every other aspect of instrument operation. Together, IEEE-488.2 and SCPI create a command structure for all programmable instruments.

Compatibility

An instrument that uses the IEEE-488.2 standard and SCPI does not have any special hardware requirements. The IEEE-488 interface that you used with the old standard will work with the new standard. Simply connect the Model 7001 to a computer that is equipped with an IEEE-488 interface.

NOTE

The term GPIB (General Purpose Interface Bus) is used in this manual and in the menu structure of the instrument. GPIB is simply another term for the IEEE-488 bus.

3-18

Getting Started

3.7.1 Bus connections

Before using the instrument over the bus, you must connect the IEEE-488 connector on the rear panel of the instrument to the IEEE-488 connector of your controller. Use a Keithley Model 7007 or similar IEEE-488 cable for this connection.

3.7.2 Primary address

The primary address of the Model 7001 must agree with the primary address you intend to specify in the controller’s programming language. The factory setting for the primary address is 7, so if you intend to use that address, you need not change it. However, the primary address can be set to any value between 0 and 30 by using the GPIB setup menu (ADDRESS selection) available with the MENU key.

3.7.3 Abbreviated common command summary

Table 3-1 provides an abbreviated list of Common Commands which are deﬁned by the IEEE-488.2 standard. These are the Common Commands that are most used for bus operation. Note that each Common Command is preceded by a star (*).

3.7.4 Abbreviated SCPI command summary

Most instrument operations are controlled using SCPI commands. Table 3-2 provides an abbreviated list of the SCPI commands necessary to perform some basic operations.

Not shown in the table are companion query commands for the :ARM and :TRIGger Subsystem commands (:COUNt?, :DELay?, :SOURce?, and :TIMer?). For example, the :TRIGger:SOURce? query command is used to request the currently selected control source. After the query command is sent and the Model 7001 is addressed to talk, a message identifying the selected control source will be sent to the computer.

Table 3-1

Abbreviated common command summary

Mnemonic Name Description

*CLS Clear status Clears Error Queue and event registers.

*RST Reset Returns the 7001 to *RST default conditions (see Table 5-6).

*TRG Trigger Issues a bus trigger (same as group execute trigger command; GET).

*SAV <n> Save Saves the current setup conﬁguration in memory (n = 0 to 9).

*RCL <n> Recall Returns the instrument to the setup conﬁguration stored in memory

(n = 0 to 9).

3-19

Getting Started

Table 3-2

Abbreviated SCPI command summary

:SYSTem

:PRESet

[:ROUTe]

:CLOSe <list>

:STATe ? :OPEN <list>|ALL :SCAN <list>

:INITiate :ABORt :ARM

:LAYer2

:COUNt <n>|INF

:DELay <num>

:SOURce HOLD|IMMediate|

TIMer|MANual|BUS|TLINk| EXTernal

:TIMer <num>

:TRIGger

:COUNt <n>|INF

:AUTo ON/OFF :DELay <num> :SOURce HOLD|IMMediate|MANual|

BUS|TLINk|EXTernal|TIMer :TIMer <num>

Subsystem command path.

Set scan to a default conﬁguration (see Table 5-6)

Subsystem command path.

Path and command to close speciﬁed channels:

Request channels that are closed. Open speciﬁed (or all) channels. Path and command to specify channel list:

Initiate one trigger (scan) cycle. Reset trigger system and goes to idle state. Subsystem command path to conﬁgure scan:

Path to program scan layer:

Program number of scans (1 to 9999, or INFinite).

Program delay (0 to 99999.999 seconds

Select event to control scan spacing.

Set timer interval (0.001 to 99999.999 sec).

Subsystem command path to program channel layer:

Program number of channels (1 to 9999, or INFinite).

Enable/disable automatic scan list count. Program delay (0 to 99999.999 sec) Select event to control channel spacing.

Set timer interval (0.001 to 99999.999 sec).

Note: Command shortform is indicated by the uppercase characters. For example, instead of sending “:arm:layer2:source immediate”, you can send “:arm:lay2:sour imm”.

3.7.5 Syntax rules

The root command for the above example is :ROUTe. This is an optional command word (as indicated by the brackets in the table) and need not be used.

The following information explains some of the programming syntax for the Model 7001. For more complete information see Programming Syntax which is located just after the tab labled “SCPI Command Subsystems”.

Note that there must be a space between the command word and the parameter. In the above example, there is a space between the :OPEN command word and the ALL parameter.

General form

The general form for SCPI commands is demonstrated in Table 3-2. Notice that they are hierarchical in nature and begin with a root command. For example, to open all channels, you would send the following command:

SCPI command words and Common Commands are not case sensitive. They can be sent in uppercase or lowercase. The commands in Table 3-2 show a combination of upper and lowercase characters. The uppercase characters identify the short-form version of the command. For example, all the following versions of

:OPEN ALL

the same program message are valid:

3-20

Getting Started

:ARM:LAYER2:SOURCE MANUAL

:ARM:LAY2:SOUR MAN

:arm:layer2:source manual

:arm:lay2:sour man

:Arm:Lay2:Sour Man

:ArM:LaY2:SouR MaN

Parameters

As previously mentioned, a parameter is separated from the command word by a space. The parameter can consist of one or more data types such as channel list, real, integer, string, name or boolean. Examples:

1. :open (@ 1!1, 1!2)

2. :open all

3. :scan (@ 1!1:1!10)

4. :trigger:count:auto on

5. :trigger:delay 0.5

1. (@ 1!1, 1!2)  This list parameter is used to specify

a Channel List. Parentheses ( ) are used to enclose the list of channels. The @ symbol must precede the ﬁrst channel in the list. The exclamation point (!) is a SCPI delimiter used to separate the slot number from the card relay number. Each channel in the list must be separated by a comma (,).

2. All  This name parameter can instead be used as

the parameter for the :OPEN command if you wish to open all channels.

3. (@ 1!1:1!10)  This list parameter is used to specify

a Scan List. This is the same type of parameter used in Example 1. In this example, Channels 1 through 10 are speciﬁed. Notice that the colon (:) is used as a separator for the range limits.

4. On  This boolean parameter is used to enable an

automatic scan list count. A “1” could have instead been used. “Off” or “0” will disable the function.

5. 0.5  This real number parameter sets the delay

period in seconds.

Multiple commands

Multiple commands can be sent in the same message as long as they are separated by semicolons (;). For example:

Instead of sending...

:system:error?

:system:preset

You can send ...

:system:error?;preset

When the above message is sent, the ﬁrst command word is recognized as the root command. When the path pointer sees the colon (:) after the semicolon (;), it resets to the root and starts over.

Proper use of the path pointer allows commands in the same command level to be serviced without having to re-type the entire command path. For example, the command :ARM:LAYer2:SOURce MANual moves the path pointer down to the last command level in the path. As a result, the :COUNt, :DELay, and :TIMer commands and their companion query commands can be included in the same program message without repeating the entire path. Examples:

Instead of sending...

:arm:lay2:sour man;:arm:lay2:sour?

You can send ...

:arm:lay2:sour man;sour?

Instead of sending...

:trig:coun 1;:trig:del 1;:trig:tim 1

You can send ...

:trig:coun 1;del 1;tim 1

Notice that the colon (:) for the additional commands is not included. Remember, when a colon (not preceeded by a semicolon) is seen, the path pointer moves down to the next command level. For example:

:trig:del 1;coun:auto on

When this message is sent, the path pointer moves down one command level for the DELAY and COUNT commands. The colon after the COUNT command then moves the pointer down to the next command level and enables AUTO.

3-21

Getting Started

A couple of important points:

1. The path pointer can only move down. It cannot be moved up a level.

2. Each new message (line) must begin with the root command.

3. Any time one or more query commands are included in a program message, the Model 7001 must be addressed to talk to send the response message to the computer.

3.7.6 Programming examples

The following programming examples are written in Hewlett-Packard BASIC 4.0 programming language. The programs assume that the Model 7001 is set to primary address 7.

Programming example #1  closing and opening channels

The following program will close channels 1, 3, 4, 5, and 6 of slot 1, and then open them after a short delay:

10 OUTPUT 707; “*RST;:open all” 20 OUTPUT 707; “:clos (@ 1!1, 1!3:1!6)” 30 OUTPUT 707; “:clos:stat?” 40 ENTER 707; A$ 50 PRINT A$ 60 WAIT 3 70 OUTPUT 707; “:open (@ 1!1, 1!3:1!6)” 80 END

Line 10 Opens any channels that are closed. Line 20 Close channels 1, 3, 4, 5, and 6 of slot 1. Line 30 Request the closed channels. Line 40 Address 7001 to talk. Line 50 Display closed channels. Line 60 Three second delay. Line 70 Open the channels speciﬁed in the channel

list.

30 OUTPUT 707; “:init” 40 END

Line 10 Return 7001 to :SYSTem:PRESet default con-

ﬁguration (scan count = inﬁnite, channel count = 10 channels, channel control source =

manual). Line 20 Deﬁne scan list. Line 30 Take 7001 out of idle state.

When the above program is run, the scan will arm (ARM indicator on) and then wait for front panel STEP key presses to control the channel scan. After taking the Model 7001 out of remote (press LOCAL key), each press of the STEP key will scan the next channel in the scan list.

Programming example #3  bus trigger controlled scan

The program in Example #2 is modiﬁed so that the channel scan will be controlled by bus triggers (*TRG or GET):

10 OUTPUT 707; “:syst:pres” 20 OUTPUT 707; “:scan (@1!1:1!10)” 25 OUTPUT 707; “:trig:sour bus” 30 OUTPUT 707; “:init” 40 END

Line 10 Return 7001 to :SYSTem:PRESet default con-

ﬁguration (scan count = inﬁnite, channel

count = 10 channels, channel control source =

manual). Line 20 Deﬁne scan list. Line 25 Program channel control source for bus trig-

gers. Line 30 Take 7001 out of idle state.

When the above program is run, the scan will arm and then wait for bus triggers to control the channel scan. Any of the following two programming statements can be used to provide a bus trigger:

Programming example #2  manual scanning

The following program will conﬁgure the Model 7001 to perform an inﬁnite number of manual scans of 10 channels for slot 1:

10 OUTPUT 707; “:syst:pres” 20 OUTPUT 707; “:scan (@1!1:1!10)”

3-22

OUTPUT 707; “*TRG”

TRIGGER 707

Every time one of the above statements is executed, a bus trigger will occur causing the next channel in the scan list to be scanned.

Getting Started

Programming example #4  timer controlled channel scan

The program in Example #2 is modiﬁed so that the channel scan will be controlled by a timer:

10 OUTPUT 707; “:syst:pres”

20 OUTPUT 707; “:scan (@1!1:1!10)”

25 OUTPUT 707; “:trig:sour tim”

26 OUTPUT 707; “:trig:tim 0.5”

30 OUTPUT 707; “:init”

40 END

Line 10 Return 7001 to :SYSTem:PRESet default con-

ﬁguration (scan count = inﬁnite, channel count = 10 channels, channel control source = manual).

Line 20 Deﬁne scan list.

Line 25 Program channel control source for timer.

Line 26 Set timer for 0.5 second interval.

Line 30 Take 7001 out of idle state.

When the above program is run, the scan will arm and scan channels continuously at a 0.5 second rate.

Programming example #5  timer controlled scan

The program in Example #4 is modiﬁed to perform two scans, the ﬁrst scan will start immediately and the second scan will start 10 seconds after the start of the ﬁrst scan:

10 OUTPUT 707; “:syst:pres” 20 OUTPUT 707; “:scan (@1!1:1!10)” 22 OUTPUT 707; “:arm:lay2:coun 2” 23 OUTPUT 707; “:arm:lay2:sour tim” 24 OUTPUT 707; “:arm:lay2:tim 10” 25 OUTPUT 707; “:trig:sour tim” 26 OUTPUT 707; “:trig:tim 0.5” 30 OUTPUT 707; “:init” 40 END

Line 10 Return 7001 to :SYSTem:PRESet default con-

ﬁguration (scan count = inﬁnite, channel count = 10 channels, channel control source =

manual). Line 20 Deﬁne scan list. Line 22 Program scan count to 2. Line 23 Program scan control source for timer. Line 24 Set timer for 10 second interval. Line 25 Program channel control source for timer. Line 26 Set timer for 0.5 second interval. Line 30 Take 7001 out of idle state.

3-23

Getting Started

3-24

Front Panel Operation

4.1 Introduction

This section covers all aspects of Paragraphs in this section are organized as follows:

4.2 Power-up procedure: Covers information on

connecting the instrument to line power, and the power-up sequence.

4.3 Display: Covers the display formats and lists

messages that may appear while using the instrument.

4.4 Analog backplane: Explains how two Model

701X series switching cards may be internally connected together through the analog backplane of the Model 7001.

4.5 Mainframe programming: Explains how to cre-

ate a channel list and a scan list. The basic close/ open operation and scan operation is covered here.

4.6 MENU: Covers miscellaneous operations and se-

lections controlled from the MAIN MENU.

front panel operation.

4.9 Digital I/O port: Describes the input/output

port, which is made up of four output lines and one input line.

4.10 External triggering: Covers external triggering

using the rear panel BNC connectors.

4.11 Trigger link: Covers external triggering using the

trigger link.

4.2 Power-up procedure

The Model 7001 can be operated from line voltages from 100-240VAC at line frequencies of 50 or 60Hz.

4.2.1 Line power connections

Using the supplied power cord, connect the instrument to an appropriate AC power source. The female end of the cord connects to the AC receptacle on the rear panel of the instrument. The other end of the cord connects to a grounded AC outlet.

4.7 CARD CONFIG: Covers the various conÞgura- tion operations for the two slots (Card 1 and Card

2) from the CARD CONFIG MENU.

4.8 SCAN CONFIG: Covers the CONFIGURE

SCAN menu, which is used to conÞgure the various layers of scan operation.

WARNING

The Model 7001 must be connected to a grounded outlet to maintain continued protection against possible shock hazards. Failure to use a grounded outlet may result in personal injury or death due to electric shock.

4-1

Front Panel Operation

4.2.2 Power switch

To turn on the power, simply push in the front panel POWER switch. Power is on when the switch is at the inner (1) position. To turn off power, press POWER a second time to release the switch.

4.2.3 Power-up sequence

On power-up, the Model 7001 will go through the following sequence:

1. The instrument will perform self-tests on its EPROM and RAM memory elements. If a failure is detected, the instrument will lock up and display the following message:

No Comm Link

Note: If a problem develops while the instrument is under warranty, return it to Keithley Instruments, Inc. for repair.

Model 7011 multiplexer card is installed in slot 1 and a Model 7012 matrix card is installed in slot 2, the following message will be displayed brieﬂy:

#1 = 7011 #2 = 7012

Non-701X series cards  The Model 7001 cannot

automatically identify non-701X series cards. The model numbers of these cards are entered by the user using the Card Conﬁguration menu (see paragraph 4.7). On power-up, the mainframe checks its memory and displays the model number last entered by the user. For example:

#1 = 7052 #2 = NONE

“7052” indicates that a Model 7052 card was last assigned to slot 1. There may or may not be a Model 7052 card currently installed in slot 1. The message “NONE” indicates that the user last designated slot 2 to be empty, or the last card installed in the now empty slot was a Model 701X series card. Slot 2 may be empty or it may contain an unassigned non-701X series card.

2. If the instrument passes the self-tests, the ﬁrmware revision levels and currently selected IEEE-488 address will be displayed. An example of this display is shown as follows:

Model 7001

Rev. AXX AY IEEE Addr = 07

where: Rev. AXX is the ﬁrmware level for the main CPU.

Rev. A YY is the ﬁrmware level for the display CPU. 7 is the current IEEE-488 Addr ess. Note that the in-

strument is shipped from the factory with the address set to 7.

3. The Model 7001 will then perform card identiﬁca- tion (Card ID). Card ID is required so that the mainframe can conﬁgure itself to operate properly for installed cards. Card ID is described as follows:

Model 701X series cards  If a Model 701X series

card (i.e. 7011, 7012 or 7013) is installed in the mainframe, it will be automatically identiﬁed. The operator need not do anything. For example, if a

“9990” or “9991” indicates that the slot was assigned by the user to simulate a switching card. With “9990” assigned, the mainframe will operate as if a 40 channel multiplexer card is installed. W ith “9991” assigned, the mainframe will operate as if a 4 × 10 matrix is installed. This simulation mode allows you to develop and test a switching system without having the card installed.

NOTE

For non-701X series cards, make sure that the power-up Card ID model number messages correspond to what is actually installed in the mainframe. Use the Card Conﬁguration menu (see paragraph 4.7) to assign the correct model numbers to the slots.

4. After card identiﬁcation, the instrument will go to the channel status display state (see paragraph 4.3 Display).

4-2

Front Panel Operation

4.3 Display

The display of the Model 7001 (see Figure 4-1) is primarily used to display channel status along with the entered channel list or scan list. When not displaying

Annunciators

CARD 1 CARD 2

Channel

Entry

Prompt

1 23

REM4TALK

A) Channel List Display (Power Up Default)

LSTN7SRQ

89101234567

channel status, the display is used for informational type messages, such as menu headings and selections. At the top of the display are annunciators to indicate various states of operation.

ARM

8910

Channel

Status

Display

Channel

Entry

Prompt

B) Scan List Display

Figure 4-1

Display format

1 23

REM4TALK

CARD 1 CARD 2

LSTN7SRQ

89101234567

ARM

8910

Channel

Status

Display

4-3

Front Panel Operation

4.3.1 Channel status display

The channel status display provides real-time status (open or closed) of each available channel for the two slots; Card 1 and Card 2. Only available channels are displayed. A single “dot” indicates that the available channel is open. A “dash” (5 dots) indicates that the channel is closed (see Figure 4-2).

The channel entry prompt depends on which display mode is currently selected. After power-up, the instrument is in the channel list entry state (see Figure 4-1A) for basic close/open operation. When SCAN LIST is pressed, the instrument goes to the scan list entry state as shown in Figure 4-1B. In general, pressing the EXIT key will select the channel status display, and pressing the SCAN LIST key will toggle between the channel list and the scan list.

Channel designations for the channel status display depend on the type of card installed. For example, if a non-matrix type card (i.e. Model 7011 multiplexer or Model 7013 relay switch card) is installed, the channels would be numbered 1 through 40. Figure 4-3A shows Channel 27 of a non-matrix type card closed. If, however , a matrix card (i.e. Model 7012) is installed, channels are designated as row/column crosspoint coor dinates. Figure 4-3B shows matrix crosspoint at Row 3, Column 7 closed.

CARD 1

1 234567 8910

11 21 31

Channel 27 Closed

A) Non-Matrix Type Cards

CARD 1

Column

1 234567 8910

1 2

Row

3 4

Row 3, Column 7 Crosspoint Closed

B) Matrix Cards

Figure 4-3

Interpreting channel status display

20 30 40

1 23

= Open Channel = Closed Channel

Figure 4-2

Channel status display

4-4

CARD 1 CARD 2

REM4TALK

LSTN7SRQ

89101234567

ARM

8910

Channel 2!36 for Mux Channel 2!4!6 for Matrix

Front Panel Operation

4.3.2 Information and error messages

When not displaying channel status, the front panel display is used for other information messages, such as menu items, store and recall information, and error and status messages. Error and status messages for the Model 7001 are summarized in Table 4-1.

Also included is a front panel INFO key that displays helpful operating information about the feature you are trying to use. Pressing EXIT or INFO a second time will cancel the message.

4.3.3 Annunciators

The ﬁve annunciators along the top of the display indicate the following conditions:

SRQ  Turns on when the unit requests service over

the IEEE-488 bus. Programming the Service Request Enable Register allows you to control which conditions will generate an SRQ (see Section 5).

REM  Turns on to indicate that the Model 7001 is in

remote when used over the IEEE-488 bus. The Model 7001 can be placed in remote by addressing it to listen with the bus REN line true.

TALK  T urns on to indicate that the Model 7001 is the

active talker on the IEEE-488 bus. The unit can be placed in the talker active state by sending it the correct bus talk command, which is derived from the primary address.

LSTN  Turns on when the unit is an active IEEE-488

bus listener . The Model 7001 can be placed in the active listener state by addressing it to listen.

ARM  T urns on when the Model 7001 is taken out of

the idle state. A scan can only be performed with the Model 7001 out of the idle state.

Table 4-1

Error and status messages

Code number Description

+550 +522 +521 +510

+174 +173 +172 +171 +161 +126

+125 +124 +123 +122 +121

+101 0

-100

-101

-102

-103

-104

-105

-108

-109

-110

-111

-112

-113

-114

-120

-121

-123

-124

-128

-140

-141

-144

-148

-150

-151

-154

-158

-160

-161

“Forbidden channel error” (EE) “Slot 2 identiﬁcation error” (EE) “Slot 1 identiﬁcation error” (EE) “Saved state error” (EE)

“Re-entering idle layer” (SE) “Waiting in arm layer 2” (SE) “Waiting in arm layer 1” (SE) “Waiting in trigger Layer” (SE) “Program running” (SE) “Device calculating” (SE)

“Device measuring” (SE) “Device sweeping” (SE) “Device ranging” (SE) “Device settling” (SE) “Device calibrating” (SE)

“Operation Complete” (SE) “No error” (SE) “Command Error” (EE) “Invalid Character” (EE) “Syntax Error” (EE

“Invalid Separator” (EE) “Data Type Error” (EE) “GET not allowed” (EE) “Parameter not allowed” (EE) “Missing Parameter” (EE)

“Command Header Error” (EE) “Command Header Separator Error” (EE) “Program mnemonic too long” (EE) “Undeﬁned header” (EE) “Header sufﬁx out of range” (EE)

“Numeric data error” (EE) “Invalid character in number” (EE) “Exponent too large” (EE) “Too many digits in number” (EE) “Numeric data not allowed” (EE)

“Character data error” (EE) “Invalid character data” (EE) “Character data too long” (EE) “Character data not allowed” (EE) “String data error” (EE)

“Invalid string data” (EE) “String too long” “String data not allowed” (EE) “Block data error” (EE) “Invalid block data” (EE)

4-5

Front Panel Operation

Table 4-1 (cont.)

Error and status messages

Code number Description

-168

-170

-171

-178

-200

-201

-202

-210

-211

-212

-213

-214

-215

-220

-221

-222

-223

-224

-241

-260

-281

-282

-284

-285

-330

-350

-410

-420

-430

-440

“Block data not allowed” (EE) “Expression error” (EE) “Invalid expression” (EE) “Expression data not allowed” (EE) “Execution error” (EE)

“Invalid while in local” (EE) “Settings lost due to rtl” (EE) “Trigger error” (EE) “Trigger ignored” (EE) “Arm ignored” (EE)

“Init ignored” (EE) “Trigger deadlock” (EE) “Arm deadlock” (EE) “Parameter Error” (EE) “Settings conﬂict” (EE)

“Parameter data out of range” (EE) “Too much data” (EE) “Illegal parameter value” (EE) “Hardware missing” (EE) “Expression Error” (EE)

“Cannot create program” (EE) “Illegal program name” (EE) “Program currently running” (EE) “Program syntax error” (EE) “Self Test failed” (EE)

“Queue overﬂow” (EE) “Query interrupted” (EE) “Query unterminated” (EE) “Query deadlocked” (EE) “Query unterminated after indeﬁnite response” (EE)

EE = Error event SE = Status event

4.4 Analog backplane

The Model 7001 has a three-pole analog backplane that allows the rows or banks of a Model 701X series card installed in one slot to be connected to the rows or banks of a second Model 701X series card installed in the other slot. The three-pole analog backplane of the mainframe is shown in Figure 4-4.

For example, if the backplane jumpers of two Model 7012 matrix cards are installed, the rows of the two cards are connected together by simply installing them in the mainframe. The result is a single 4 × 20 matrix. If the backplane jumpers on one or both of the matrix cards were removed, the two car ds would be electrically isolated from each other resulting in two separate 4

10 matrices. Figure 4-5 shows how the Model 7012

matrix card is connected to the analog backplane. Note that the matrix card has only two poles (High and Low). The third pole (Guard) of the analog backplane is not used.

Keep in mind that not all Model 701X series cards can be connected to the analog backplane of the Model

7001. The Model 7013 Relay Switch Card is made up of 20 individual IN/OUT relay channels. Each channel is electrically isolated from each other. A Model 7013 installed in a slot of the mainframe will be electrically isolated from any other card installed in the other slot.

NOTE

The Model 7001 does not provide an analog backplane for non-701X series cards (such as the Model 7052). A non701X series card installed in a slot of the mainframe will be electrically isolated from any other card installed in the other slot. The only way to connect one of these cards to a card in the other slot is to wire them together.

4-6

Model 7001

Front Panel Operation

Card 1 Card 2

Analog

Backplane

Row 1 or Bank A

Row 2 or Bank B

Row 3 or Bank C

Row 4 or Bank D

Figure 4-4

Model 7001 analog backplane

Figure 4-5

Matrix row connections to backplane

H = High L = Low G = Guard

Matrix Row

H = High L = Low G = Guard

(1 of 4)

Jumpers

Note : Rows correspond to matrix cards and banks correspond to multiplexer cards.

7001

Analog

Backplane

4-7

Front Panel Operation

4.5 Mainframe programming

The following paragraphs provides detailed information on programming the Model 7001 from the front panel to close channels and perform a scan.

4.5.1 Channel assignments

Channel assignments used to program the mainframe are based on the switching card type and the slot in which it is installed.

Non-matrix type cards: A non-matrix type card, such

as the Model 7011 multiplexer card, simply consists of 40 channels (1-40) as shown in Figure 4-3A. When programming the Model 7001, you need to designate the

1 2 3 4 5 6 7 8 9 10

1!1

1!2

1!3

1!4

1!5

slot in which the card is installed. Thus, combining the slot number with card channel number provides the CHANNEL assignment for the mainframe. The slot and card channel are separated by an exclamation point (!). For the following examples, “CHANNEL” refers to the programming channel assignment for the mainframe, while “Channel” refers to the channel number of the switching card.

CHANNEL 1!1 = Slot 1, Channel 1 CHANNEL 1!20 = Slot 1, Channel 20 CHANNEL 2!2 = Slot 2, Channel 2 CHANNEL 2!36 = Slot 2, Channel 36

All mainframe channel assignments for non-matrix type switching cards are shown in Figure 4-6.

CARD 1

1!6

1!7

1!8

1!9

1!10

1!11

1!21

1!31

1!12

1!22

1!32

1!13

1!23

1!33

1!14

1!24

1!34

1!15

1!25

1!35

1!16

1!26

1!36

1!17

1!27

1!37

1!18

1!28

1!38

1!19

1!29

1!39

A. Slot 1 (Card 1)

CARD 2

1 2 3 4 5 6 7 8 9 10

2!1

2!11

2!21

2!31

2!2

2!12

2!22

2!32

2!3

2!13

2!23

2!33

2!4

2!14

2!24

2!34

2!5

2!15

2!25

2!35

2!6

2!16

2!26

2!36

2!7

2!17

2!27

2!37

2!8

2!18

2!28

2!38

2!9

2!19

2!29

2!39

B. Slot 2 (Card 2)

Examples : 1!18 = Slot 1, Channel 18 2!36 = Slot 2, Channel 36

1!20

1!30

1!40

2!10

2!20

2!30

2!40

Figure 4-6

Channel assignments (non-matrix type cards)

4-8

Front Panel Operation

Matrix cards: Channels for a matrix card, such as the

Model 7012, are organized as row/column cr osspoints as shown in Figure 4-3B. When programming the Model 7001, you need to designate the slot in which the card is installed. Thus, combining the slot number with the crosspoint coordinates (row/column) provides the CHANNEL assignment for the mainframe. Slot, row, and column are separated by exclamation points (!). For the following examples, “CHANNEL” refers to the programming channel assignment for the mainframe.

1 2 3 4 5 6 7 8 9 10

1!1!1

1!2!1

1!3!1

1!4!1

1!1!2

1!2!2

1!3!2

1!4!2

1!1!3

1!2!3

1!3!3

1!4!3

1!1!4

1!2!4

1!3!4

1!4!4

1!1!5

1!2!5

1!3!5

1!4!5

A. Slot 1 (Card 1)

CHANNEL 1!1!1 = Slot 1, Row 1, Column 1 CHANNEL 2!3!6 = Slot 2, Row 3, Column 6

All mainframe channel assignments for matrix cards are shown in Figure 4-7.

CARD 1

1!1!6

1!2!6

1!3!6

1!4!6

1!1!7

1!2!7

1!3!7

1!4!7

1!1!8

1!2!8

1!3!8

1!4!8

1!1!9

1!2!9

1!3!9

1!4!9

1!1!10

1!2!10

1!3!10

1!4!10

1 2 3 4 5 6 7 8 9 10

2!1!1

2!2!1

2!3!1

2!4!1

2!1!2

2!2!2

2!3!2

2!4!2

B. Slot 2 (Card 2)

Examples : 1!2!4 = Slot 1, Row 2, Column 4 2!3!6 = Slot 2, Row 3, Column 6

Figure 4-7

Channel assignments (matrix cards)

2!1!3

2!2!3

2!3!3

2!4!3

2!1!4

2!2!4

2!3!4

2!4!4

CARD 2

2!1!5

2!2!5

2!3!5

2!4!5

2!1!6

2!2!6

2!3!6

2!4!6

2!1!7

2!2!7

2!3!7

2!4!7

2!1!8

2!2!8

2!3!8

2!4!8

2!1!9

2!2!9

2!3!9

2!4!9

2!1!10

2!2!10

2!3!10

2!4!10

4-9

Front Panel Operation

4.5.2 Channel list and scan list

The Model 7001 can perform two basic operations; it can close and open a list of channels, and it can scan through a list of channels. The following paragraphs explain how to enter channels for these operations. The basic operations are explained in paragraphs 4.5.3 (Closing and Opening Channels) and 4.5.4 (Scanning Channels).

Each operation has its own list. For basic close/open operation, channels are entered into a channel list. For scan operation, channels are entered into a scan list. In general, press EXIT to select the channel status display (if not already displayed as shown in Figure 4-2) and press SCAN LIST to toggle between the channel list and scan list.

A pr ogrammed CHANNEL for the mainframe consists of the slot number and the card channel. Slot and card channel are separated by an exclamation point (!). For a matrix card, the card channel consists of a row and column that are also separated by an exclamation point (!). Individual CHANNELS in the deﬁned list are separated by a comma (,). A range of CHANNELS is separated by a hyphen (-). A channel pattern stored in memory is designated by the letter “M” followed by the memory location number. Finally, the list is terminated by a comma (,).

The following examples demonstrate how the Scan List is lost:

1. Assume the Scan List includes channel 1!21 and the assignment for slot 1 is changed to a multiplexer card that has only 20 channels. Since channel 1!21 no longer exits, the entire Scan List is cleared.

2. Assume the Scan List includes channel 1!1 and the assignment for slot 1 is changed to a matrix card. Since channel 1!1 is an incorrect format for a matrix card, it no longer exists. The enire Scan List is cleared.

3. Assume the Scan List includes channel 1!21 and the slot (slot 1) is conﬁgured for 2-pole operation. Changing the pole-mode of slot 1 to 4-pole operation makes channel 1!21 unavailable and clears the entire Scan List.

4. Assume Channel Pattern M1 is included in the Scan List and M1 includes channel 1!1 as a closed channel. If channel 1!1 becomes unavailable, the entire Scan List is cleared. Also note that Channel Pattern M1 is also cleared (see paragraph 4.5.5).

5. Assume the Scan List includes channel 1!1. If channel 1!1 is then added to the restricted channel list, the entire Scan List is cleared.

6. Assume the Scan List includes channel 1!1 and Card Pair is enabled. Note that with card pair enabled, channel 2!1 is indirectly included in the Scan List. If cahnnel 2!1 is then added as a restricted channel, the entire Scan List will clear since one of its channels has become restricted.

For basic close/open operation, the order of channels in the channel list is not important since all listed channels will either close or open at the same time. For scan operation, the order of channels is important. Channels will be scanned in the order that they are presented in the scan list.

The Scan List is not lost (cleared) after the instrument is turned off. However , the Scan List is clear ed if any of the following events occur:

1. A channel in the Scan List becomes unavailable. A channel can become unavailable by changing a slot assignment (Card TYPE) or by changing to a pole mode that reduces the number of available channels.

2. A channel in the Scan List becomes restricted. A channel becomes restricted by adding it to the restricted channel list.

4-10

Perform the following steps to create a channel list or scan list:

Step 1. Select display mode.

1. If you are entering a list of channels for basic close and open operation, make sure the instrument is in the channel list display state (see Figure 4-1A) with the following message prompt displayed:

SELECT CHANNELS

The Model 7001 powers-up to this state. The SCAN LIST key toggles between the channel list and the scan list.

2. If you are entering a list of channels for scan operation, display the scan list:

SCAN CHANNELS

Front Panel Operation

Note: If an unwanted list is currently displayed, press CLEAR LIST to clear the display of all listed channels.

Step 2. Enter slot number and card channel.

1. Enter slot number  If the desired channel is on Card 1 (slot 1), press the “1” key on the keypad. If the desired channel is on Card 2 (slot 2), press the “2” key. The separator between slot and channel will automatically be entered after you key in the slot number . For example, if you selected slot 1, the entered channel data will look like this:

SELECT CHANNELS 1! SCAN CHANNELS 1!

2. Enter card channel: Non-matrix type card  For a non-matrix type

card, use the keypad to enter the card channel number. For example, if you entered channel 20 (with slot 1 previously selected), the entered channel data will look like this:

SELECT CHANNELS 1!20 SCAN CHANNELS 1!20

SELECT CHANNELS M SCAN CHANNELS M1

Paragraph 4.5.5 explains how to store channel patterns into memory.

At this point, the entered channel can be cancelled by pressing the left cursor key ( ).

Step 3. Enter channel separator or terminator.

Channel separators are required for multiple channel entries, and a terminator should be used after the last entered channel.

The comma (,) is used to separate channels, and serves to terminate the list. After entering a channel, as explained in Step 2, press the right cursor key ( ) or ENTER to put in the comma separator. Another channel can then be keyed-in. After the last channel in list is keyed-in, use the ENTER key or the right cursor key ( ) to terminate the list. The comma terminator prevents the last entered channel from being cancelled when the left cursor key ( ) is pressed. The following example shows proper format:

Matrix card  For a matrix card, use the keypad to ﬁrst enter the row number (1 through 4), and then the column number. The separator between row and column will automatically be inserted after you enter the row number. For example, if you entered row 3, column 6 (with slot 2 previously selected), the entered channel data will look like this:

SELECT CHANNELS 2!3!6 SCAN CHANNELS 2!3!6

NOTE

The Model 7001 can store up to 100 channel patterns in memory locations M1 through M100. The closed channels in any one of these patterns can be entered by simply keying in the memory location using the “M” key on the keypad. For example, assume memory location M1 contains 10 closed channels for a speciﬁc slot, enter the channel pattern by simply keying in M1 from the keypad. The entered channel data will look like this:

SELECT CHANNELS 1!1, 1!2, 1!3, 1!4, 1!5, 1!6, 1!7, 1!8, 1!9, 1!10, M1,

SCAN CHANNELS 1!1, 1!2, 1!3, 1!4, 1!5, 1!6, 1!7, 1!8, 1!9, 1!10, M1,

The above display indicates that channels 1!1 through 1!10, and the closed channels stored at memory location 1 (M1) are entered.

The hyphen (-) is used to designate a range of channels. After entering the ﬁrst channel, as explained in Step 2, press the “-” key on the keypad to put in the hyphen, and then key-in the last channel. The following example shows proper format:

SELECT CHANNELS 1!1-1!10, M1, SCAN CHANNELS 1!1-1!10, M1,

The above display indicates that channels 1!1 through 1!10, and the closed channels stored at memory location 1 (M1) are entered.

Step 4. Repeat the basic procedure in steps 2 and 3 to enter all required channels.

4-11

Front Panel Operation

Step 5. Edit the entered list as required.

Edit keys are available to make changes to a list. These keys allow you to change channels, delete channels, or insert channels anywhere in the list. When editing, a channel range (i.e. 1!1-1!6) and a memory location (i.e. M1) are treated as single channel entries.

1. Changing a channel  Perform the following steps to change a channel:

A. Use the cursor keys to place the cursor at the

beginning of the channel entry to be changed.

B. Key in the new channel entry, and press the

right cursor key ( ) or ENTER to add the comma.

2. Deleting a channel  to delete a channel:

A. Place the cursor at the beginning of the channel

to be deleted.

B. Press the DELETE key to delete the channel en-

try.

3. Inserting a channel  Perform the following steps to insert a channel anywhere in the list:

A. Position the cursor at the desired location in the

list. The channel will be inserted between the selected channel entry and the channel entry before it.

B. Press the INSERT key. The following message

will be displayed:

INSERTING ENTRY

C. Key in the new channel entry, and press the

right cursor key ( ) or ENTER to add the comma.

D. Press INSER T a second time to cancel the insert

edit function.

4. Deleting all channels  The entire list can be cleared by pressing CLEAR LIST.

Perform the following steps

Summary of channel list and scan list entry keys:

Keypad:

Number keys  Enter slot and channel numbers (row and column for matrix).

“M” and number keys  Enter memory location of stored channels (i.e. M1).

“-”  Deﬁne a range of channels (i.e. 1!1-1!9).

“ and ”  After terminating list, use cursor keys to select channel entry to be edited.

ENTER: Enter channel separator (,) and list terminator (,) (i.e 1!1,).

INSERT: Create new channel entry at selected location in the list.

DELETE: Clear selected channel entry. CLEAR LIST: Clear displayed list.

NOTES

1. When a scan list is modiﬁed over the IEEE-488 bus, the displayed scan list will not update until a display state change occurs (i.e., pressing the SCAN LIST key).

2. A channel list is lost after the instrument is turned off.

4.5.3 Closing and opening channels

One of the basic capabilities of the Model 7001 is to close (or open) one or more channels speciﬁed by the user . All the speciﬁed channels will either close or open at the same time. An exception to this is when the Single Channel mode is enabled (see paragraph 4.8.4). With Single Channel mode enabled, only the lowest numbered channel in the lowest numbered slot will close.

This operation is performed with the instrument in the channel list display state. The instrument powers up to the channel list display state.

The procedure to close and open channels requir es that you understand how to enter the channels to be controlled. In general, a channel list is entered using the keypad. The number keys are used to enter slot and channel (row and column for a matrix card). The right cursor key ( ) (or ENTER key) adds a comma (,) which is used as a channel separator and list terminator. The hyphen key (-) is used to deﬁne a range of channels. Finally, the “M” key is used to enter closed channels of a channel pattern stored in memory. For details, see paragraph 4.5.2.

“”  Enter channel separator (,).

4-12

Front Panel Operation

Perform the following steps to close and open channels:

NOTE

Before performing any close/open operations, make sure the switching cards you are using are properly conﬁgured. The CARD CONFIG MENU is used to conﬁgure various aspects of operation for the installed card(s). See paragraph 4.7 for details.

Step 1. Place instrument in channel list display state.

If the Model 7001 is not in the channel list display state, press EXIT and/or SCAN LIST until the following message prompt is displayed:

SELECT CHANNELS

Step 2. Enter channel list.

Enter the channels to be closed/opened as explained in paragraph 4.5.2. The following example demonstrates proper format:

SELECT CHANNELS 1!1, 1!2, 2!1-2!5, M1,

The above channel list includes channels 1 and 2 of slot 1, channels 1 through 5 of slot 2, and whatever channel pattern is stored in memory location 1 (M1).

Summary of close/open keys:

CLOSE  Close channels deﬁned in channel list. OPEN  Open channels deﬁned in channel list. OPEN ALL  Open all closed channels.

4.5.4 Scanning channels

The Model 7001 can scan through a speciﬁed list of channels. The order that the channels are presented in the scan list determine the channel order for the scan.

Scan process (Trigger Model)

The following information describes front panel control of the scan process. The ﬂowchart (Trigger Model) in Figure 4-8 summarizes scan operation from the front panel.

Idle

The instrument is considered to be in the idle state whenever it is not operating within one of the layers of the T rigger Model. The front panel ARM indicator is off when the instrument is in the idle state. While in the idle state, the instrument cannot perform a scan.

Step 3. Close (or open) listed channels.

Perform the appropriate close/open operation as follows:

1. To close the listed channels, press the CLOSE key. The “dashes” on the channel status display will indicate the closed channels.

2. To open the listed channels that are currently closed, press OPEN. Note that only the listed channels will open. Any channels that are closed, but not included in the list, will not open when OPEN is pressed. To open unlisted channels, you must press OPEN ALL.

Note: The OPEN and CLOSE keys are only functional while in the normal channel display state. The OPEN ALL key is functional at all times no matter what is currently being displayed.

From the front panel, the Model 7001 is taken out of the idle state by pressing the STEP key. When not in the idle state (ARM indicator on) the scanning function is considered to be enabled.

A scan can be aborted at any time by pressing the OPEN ALL key. The Model 7001 will return to the idle state.

Once the instrument is taken out of the idle state, operation proceeds into the arm layer of the Trigger Model.

4-13

Front Panel Operation

Idle

Arm Layer

Scan

Layer

Spacing

Manual Immediate GPIB External Triglink Hold

Spacing

Timer External GPIB Manual Triglink Immediate Hold

OPEN

ALL

Idle

STEP

Arm Trigger Control = Source

(Source Bypass Enabled)

Arm Event

Detection

Scan Trigger Control = Source

(Source Bypass Enabled)

Scan Event

Detection

Yes

Another

Output Trigger

Source

Bypass

Enabled

Another

Scan

Output Trigger

Source

Bypass

Enabled

Arm

Yes

Arm Count

Number of Scans

Channel

Layer

Spacing

Timer External GPIB Manual Triglink Immediate Hold

Channel Event

Detection

Figure 4-8

Trigger Model (Front panel scan operation)

Channel Trigger Control = Source

(Source Bypass Enabled)

Channel

(Device Action)

Scan

Yes

Another

Channel

Output

Trigger

Number of Channels

4-14

Front Panel Operation

Arm layer

NOTE

The arm layer is programmed from the SETUP ARM CONTROL menu (see paragraph 4.8.3).

In general, the instrument requires an arm event to allow operation to proceed to the next layer (scan layer). With Immediate arm spacing selected, operation immediately proceeds to the next layer when the instrument is taken out of the idle state. RESET and factory defaults set arm spacing to Immediate. With one of the other arm spacing events selected, the instrument will wait until the appropriate event occurs.

With Manual arm spacing selected, the instrument will wait until the front panel STEP key is pressed. With GPIB arm spacing selected, the instrument will wait until a bus trigger is received (GET or *TRG). With External arm spacing selected, the instrument will wait until an input trigger (via EXTERNAL TRIGGER connector on rear panel) is received. With TrigLink (Trigger Link) arm spacing selected, the instrument will wait until an input trigger is received (via TRIGGER LINK). With Hold arm spacing selected, the instrument will not respond to any of the arm spacing events.

As can be seen in the ﬂowchart, there is a path that allows operation to loop around the programmed spacing event. This path is called the Source Bypass. When the Source Bypass is enabled (Arm Trigger Control set to Source) and External or TrigLink arm spacing is selected, operation will loop around the spacing event on the initial pass through the arm layer. If programmed for another arm (arm count >1), the bypass loop will not be in effect even though it will be enabled. The Source Bypass loop will reset (be in effect ) when oper ation goes into Idle.

TRIGGER LINK output line. For all other arm spacing selections, the output trigger pulse will be available at the CHANNEL READY connector. The output trigger for this layer is disabled when the Source Bypass is disabled (Arm Trigger Control set to Acceptor). RESET and factory defaults set Arm Trigger Control to Acceptor.

The instrument can be programmed for additional arms. The arm count can be set to inﬁnity or to a ﬁnite value (1 to 9999). RESET and factory defaults set arm count to 1.

After leaving the arm layer , operation proceeds into the scan layer.

Scan layer

NOTE

The scan layer is programmed from the SCAN CONTROL menu (see paragraph 4.8.2).

Operation in the scan layer is similar to operation in the arm layer, except that spacing is controlled by scan events rather than arm events. A timer is available in this layer to control scan spacing. When Timer scan spacing is selected, operation will immediately proceed into the channel layer on the initial pass through the scan layer. Each additional scan (1 to 9999 or inﬁ- nite) will not occur until the programmed timer interval elapses. The timer can be set to an interval from 1msec to 99999.999 seconds.

The Source Bypass and Output Trigger function in the same manner as the Source Bypass and Output Trigger in the arm layer . The Source Bypass (if enabled) will r eset (back in effect) after all programmed scans are completed.

Enabling the Source Bypass also enables the Output T rigger in this layer . When operation r eturns to the arm layer from the scan layer, an output trigger pulse will occur. If TrigLink arm spacing is selected, the output trigger pulse will be available on the programmed

RESET and factory defaults set scan spacing to Immediate, scan count to inﬁnite and Scan T rigger Contr ol to Acceptor.

4-15

Front Panel Operation

After leaving the scan layer, operation proceeds into the channel layer.

Channel layer

NOTE

The channel layer is programmed from the CHANNEL CONTROL menu (see paragraphs 4.8.1).

Operation in the channel layer is similar to operation in the scan layer, except that spacing is controlled by channel events rather than scan events, and the Output Trigger is always enabled.

When Timer channel spacing is selected, the ﬁrst channel will be scanned immediately . Each additional channel is then scanned at a rate determined by the programmed timer interval (1msec to 99999.999 seconds). With Immediate channel spacing selected, channels will be scanned immediately. The scan rate will primarily be determined by the internally set relay settling time and any user programmed delay (see paragraph

4.7.4). For Model 701X series cards, the internal relay settling time is 6msec; 3msec after the relay closes and 3msec after the relay opens. The user programmed delay is in addition to the relay settling time.

The device action (scan channel) for each channel includes:

1. If not the ﬁrst channel in the scan, open the previous channel and wait for the internal settling delay to time out.

2. Close the next channel in the scan and wait for the internal settling delay to time out.

3. Wait for the user programmed delay (0 to

99999.999 seconds) to time out.

the CHANNEL READY connector. For TrigLink channel spacing, the Output Trigger functions as follows:

1. If the asynchronous Trigger Link mode is selected, the TTL Output Trigger pulse will be available on the programmed Trigger Link output line.

2. If the semi-synchronous Trigger Link mode is selected and the Source Bypass is disabled (Channel Trigger Control set for Acceptor), the Trigger Link line will be released (goes high).

3. If the semi-synchronous Trigger Link mode is selected, and the Source Bypass is enabled (Channel Trigger Control set for Source), the Trigger Link line will be pulled down low and then released.

See paragraph 4.11 for details on the Trigger Link.

RESET and factory defaults set channel spacing to Manual, channel count to the scan list length, and Channel Trigger Control to Source.

Scan list

Scanning channels requires that you understand how to enter channels for the scan list. In general, a channel is entered using the keypad. The number keys are used to enter the slot and channel (row and column for a matrix card). The right cursor key ( ) (or ENTER key) adds a comma (,) which is used as a channel separator or list terminator. The hyphen key (-) is used to deﬁne a range of channels. Finally, the “M” key is used to enter a channel pattern stored in memory. For details, see paragraph 4.5.2.

When a channel pattern is scanned, the closed switches in the pattern will close and remain closed for the duration of the scan. A channel pattern is useful for supplying bias voltages in a test system.

The Source Bypass (if enabled) will reset (be in effect) after the programmed number of channels are scanned.

The Output Trigger for the channel layer is always enabled and occurs after each channel is scanned (device action). For all channel spacing selections, except TrigLink, the TTL Output Trigger Pulse is available at

4-16

Scan procedure

Perform the following steps to scan channels:

NOTE

Before performing scan operation, make sure the switching cards that you are using are properly conﬁgured. The CARD CONFIG menu is used to

Front Panel Operation

conﬁgure various aspects of operation for the installed card(s). See paragraph

4.7 for details.

Step 1. Press OPEN ALL.

Before conﬁguring a scan, you should place the Model 7001 in the idle state by pressing OPEN ALL. This will stop any scan that is currently in process, open all channels, and place the Model 7001 in the idle state.

Step 2. Create a scan list.

With the instrument in the scan list display state, enter the channels to be scanned as explained in paragraph

4.5.2. The following example demonstrates proper format:

SCAN CHANNELS 1!1, 1!2, 2!1-2!5, M1,

The above scan list includes channels 1 and 2 of slot 1, channels 1 through 5 of slot 2, and whatever closed channels are stored in memory location 1. Channels will be scanned in the order that they are presented in this list. M1 will be treated as a single channel. If for example, M1 is made up of two closed channels, those two channels will close and remain closed when M1 is scanned.

At the conclusion of a scan, the last channel in the list will remain closed. If you wish to open the last channel, specify a memory location that has no closed channels as the last entry in the scan list. For example, if in the above scan list M1 has no closed channels, Channel 2!5 will open at the conclusion of a single scan.

Step 3. Conﬁgure the Channel Layer of the scan.

The channel layer is programmed from the CHAN CONTROL menu of the CONFIGURE SCAN menu. Detailed information on using the CHANNEL CONTROL menu is provided in paragraph 4.8.1 and Table 4-6.

The following procedure summarizes the steps to conﬁgure the channel layer:

2. From the CHANNEL CONTROL menu, select CHANNEL-SPACING.

3. From the SELECT CHAN SPACING menu, select one of the following events (or IMMEDIATE) to control the process of scanning channels:

A. TIMER  Use to set a time interval (1msec to

99999.999 seconds) between channels.

B. EXTERNAL  With this selection, external

triggers control channel spacing. Each trigger applied to the rear panel EXTERNAL TRIGGER connector will select the next channel of the scan.

C. GPIB  With this selection, bus triggers (GET

or *TRG) control channel spacing. Each bus trigger received by the Model 7001 will select the next channel of the scan.

D. MANUAL  With this selection, the front pan-

el STEP key is used to control channel spacing. Each press of the STEP key will select the next channel of the scan.

E. TRIGLINK  With this selection, triggers re-

ceived over the Trigger Link will control channel spacing. Each trigger will select the next channel in the scan.

F. IMMEDIATE  With this selection, events are

not used to control channel spacing. Only the time delay for relay settling and an optional DELAY (see paragraph 4.7) programmed by the user affect channel spacing in the scan.

4. From the CHANNEL CONTROL menu, select NUMBER OF CHANS.

5. From the NUMBER OF CHANNELS menu, select one of following items to specify the number of channels to scan:

A. USE SCANLIST LENGTH  With this selec-

tion, a single scan of all the channels in the scan list will occur for every programmed scan (scan count).

B. CHAN-COUNT  With this selection, you

have the following two options for CHANNEL COUNT:

a. INFINITE  With this count selection, the

channel scan will repeat indeﬁnitely.

b. ENTER-CHAN-COUNT  Use this selec-

tion to deﬁne the number of channels (1 to

9999) to scan. The channel scan wraps around and continues to satisfy a channel count that exceeds the scan list length.

1. Fr om the CONFIGURE SCAN menu, select CHAN CONTROL.

4-17

Front Panel Operation

Step 4. Conﬁgure the Scan Layer of the scan.

The scan layer is programmed from the SCAN CONTROL menu of the CONFIGURE SCAN menu. Detailed information on using the SCAN CONTROL menu is provided in paragraph 4.8.2.

The following procedure summarizes the steps to conﬁgure the scan layer:

1. From the CONFIGURE SCAN menu, select SCAN CONTROL.

2. From the SCAN CONTROL menu, select SCAN SPACING.

3. From the SELECT SCAN SPACING menu, select one of the following events (or IMMEDIATE) to control scan spacing:

A. TIMER  Use to set a time interval (1msec to

99999.999 seconds) between scans.

B. EXTERNAL  With this selection, external

triggers control scan spacing. A trigger applied to the rear panel EXTERNAL TRIGGER connector will allow operation to proceed to the channel layer.

C. GPIB  With this selection, bus triggers (GET

or *TRG) control scan spacing. A bus trigger received by the Model 7001 will allow operation to proceed to the channel layer.

D. MANUAL  With this selection, the front pan-

el STEP key is used to control scan spacing. Each press of the STEP key will allow operation to proceed to the channel layer.

E. TRIGLINK  With this selection, triggers re-

ceived over the Trigger Link will control scan spacing. A trigger will allow operation to proceed to the channel layer.

F. IMMEDIATE  With this selection, events are

not used to control scan spacing. Operation will proceed immediately to the channel layer.

4. From the SCAN CONTROL menu, select NUMBER-OF-SCANS.

5. Fr om the NUMBER OF SCANS menu, select one of following items to specify the number of scans to be performed:

A. INFINITE  With this selection, the scan will

repeat indeﬁnitely.

B. ENTER-SCAN-COUNT  Use this selection to

deﬁne the number of scans (1 to 9999) to be performed.

Step 5. Conﬁgure the Arm Layer of the scan.

The arm layer is programmed from the ARM CONTROL menu of the CONFIGURE SCAN menu. Detailed information on using the ARM CONTROL menu is provided in paragraph 4.8.3.

The following procedure summarizes the steps to conﬁgure the arm layer:

1. From the CONFIGURE SCAN menu, select ARM CONTROL.

2. From the SETUP ARM CONTROL menu, select ARM SPACING.

3. From the SELECT ARM SPACING menu, select one of the following events (or IMMEDIATE) to control the interval between arms:

A. MANUAL  With this selection, the front pan-

el STEP key is used to control arm spacing. Pressing the STEP key will allow operation to proceed to the scan layer.

B. IMMEDIATE  With this selection, events are

not used to control arm spacing. Operation will proceed immediately to the scan layer.

C. GPIB  With this selection, bus triggers (GET

or *TRG) control arm spacing. A bus trigger received by the Model 7001 will allow operation to proceed to the scan layer.

D. EXTERNAL  With this selection, external

triggers control arm spacing. A trigger applied to the rear panel EXTERNAL TRIGGER connector will allow operation to proceed to the scan layer.

E. TRIGLINK  With this selection, triggers re-

ceived over the Trigger Link will control arm spacing. A trigger will allow operation to proceed to the scan layer.

4. From the SETUP ARM CONTROL menu, select ARM COUNT.

5. From the ARM-COUNT menu, select one of following items to specify the number of arms to be performed:

A. INFINITE  With this selection, the number of

arms is inﬁnite.

B. ENTER-ARM-COUNT  Use this selection to

deﬁne the number of arms (1 to 9999) to be performed.

4-18

Front Panel Operation

Step 6. Start the scan.

NOTE

To view the scan, exit from the CONFIGURE SCAN menu by pressing EXIT until the instrument returns to the channel status display state. If needed, press SCAN LIST to display the channels to be scanned.

Step 1 of this procedure placed the Model 7001 in the idle state. In this idle state, a scan cannot be performed. The Model 7001 is taken out of the idle state by pressing the STEP key.

Once out of the idle state, the scan is considered enabled. The scan will proceed according to how the three layers are programmed. If Immediate spacing is selected, operation will pass immediately into the next layer. If spacing is programmed for a particular event, operation will not pass into the next layer until the event occurs.

Scanning examples:

The following examples assume two scans of a twochannel scan list. All events in these examples can be substituted by the STEP key. For example, if the instrument is waiting for an EXTERNAL trigger event, you can instead press STEP to provide the event.

Example 1:

5. The next channel spacing event will scan the second channel.

6. The next scan spacing event will pass operation back into the channel layer.

7. The next channel spacing event will scan the ﬁrst channel.

8. The next channel spacing event will scan the second channel and disarm (idle) the scan.

Example 2:

ARM SPACING = IMMEDIATE SCAN SPACING = IMMEDIATE CHANNEL SPACING = TIMER, EXTERNAL, GPIB, MAN-

UAL or TRIGLINK

1. Press OPEN ALL to open all channels and place the Model 7001 in the idle state.

2. Press STEP to take the 7001 out of idle state, and operation into the channel layer.

3. The ﬁrst channel spacing event will scan the ﬁrst channel.

4. The next channel spacing event will scan the second channel.

5. Operation passes automatically back into the channel layer since IMMEDIA TE scan spacing is selected.

6. The next channel spacing event will scan the ﬁrst channel.

7. The next channel spacing event will scan the second channel and disarm (idle) the scan.

ARM SPACING = IMMEDIATE SCAN SP ACING = TIMER, EXTERNAL, GPIB, MANUAL or

TRIGLINK CHANNEL SPACING = TIMER, EXTERNAL, GPIB, MAN-

UAL or TRIGLINK

1. Press OPEN ALL to open all channels and place the Model 7001 in the idle state.

2. Press STEP to take the 7001 out of the idle state (ARM indicator turns on).

3. The ﬁrst scan spacing event will pass operation into the channel layer.

4. The ﬁrst channel spacing event will scan the ﬁrst channel in the scan list.

Example 3:

ARM SPACING = MANUAL, GPIB, EXTERNAL or TRIGLINK

SCAN SP ACING = TIMER, EXTERNAL, GPIB, MANUAL or TRIGLINK

CHANNEL SPACING = TIMER, EXTERNAL, GPIB, MANUAL or TRIGLINK

1. Press OPEN ALL to open all channels and place the Model 7001 in the idle state.

2. Press STEP to take the 7001 out of the idle state.

3. The arm spacing event allows operation to pass into the scan layer.

4. The ﬁrst scan spacing event passes operation into the channel layer.

4-19

Front Panel Operation

5. The ﬁrst channel spacing event will scan the ﬁrst channel in the scan list.

6. The next channel spacing event will scan the second channel.

7. The next scan spacing event will pass operation back into the channel layer.

8. The next channel spacing event will scan the ﬁrst channel.

9. The next channel spacing event will scan the second channel and disarm (idle) the scanner.

Example 4:

ARM SPACING = MANUAL, GPIB, EXTERNAL or TRIGLINK

SCAN SPACING = IMMEDIATE CHANNEL SPACING = TIMER, EXTERNAL, GPIB, MAN-

UAL or TRIGLINK

1. Press OPEN ALL to open all channels and place the Model 7001 in the idle state.

2. Press STEP to take the 7001 out of the idle state.

3. The arm spacing event allows operation to pass into the scan layer.

4. Operation passes immediately into the channel layer since IMMEDIATE scan spacing is selected.

5. The ﬁrst channel spacing event will scan the ﬁrst channel in the scan list.

6. The next channel spacing event will select the second channel.

7. Operation passes automatically back into the channel layer since IMMEDIA TE scan spacing is selected.

8. The next channel spacing event will select the ﬁrst channel.

9. The next channel spacing event will select the second channel and disarm (idle) the scan.

3. With Single Channel enabled, only the lowest numbered channel in a memory location (i.e. M1) will close when selected.

4. Car d Pair is functional during a scan. The channels included in the scan list and the corresponding channels for the other slot will be scanned.

Summary of scan keys:

OPEN ALL  Use to stop a scan, open all channels, and place the Model 7001 in the scan idle state.

STEP  Use to take the Model 7001 out of the idle state; and also, use to manually step through a scan.

4.5.5 Storing channel patterns (STORE and RECALL)

Any displayed channel pattern can be stored in memory locations M1 through M100. A channel pattern is simply a pattern of open and closed channels.

Channel Patterns are not lost (cleared) when the instrument is turned off. However, a Channel Pattern is cleared if any of the following events occur:

1. A closed channel in the Channel Pattern becomes unavailable. A channel can become unavailable by changing a slot assignment (Card TYPE) or by changing to a pole mode that reduces the number of available channels.

2. A closed channel in the Channel Pattern becomes restricted. A channel becomes restricted by adding it to the restricted channel list.

The following examples demonstrate how a Channel Pattern is lost:

Scanning notes:

1. The STEP key is always functional during a scan and can be used to provide a spacing event. For example, if programmed for TIMER channel spacing, the STEP key can also be used to select the next channel.

2. Forbidden Channels cannot be entered into the scan list.

4-20

1. Assume a Channel Pattern includes channel 1!21 as a closed channel and the assignment for slot 1 is changed to a multiplexer card that has only 20 channels. Since channel 1!21 no longer exits, the Channel Pattern is cleared.

2. Assume a Channel Pattern includes channel 1!1 as a closed channel and the assignment for slot 1 is changed to a matrix card. Since channel 1!1 is an incorrect format for a matrix card, it no longer exists. The Channel Pattern is cleared.

Front Panel Operation

3. Assume a Channel Pattern includes channel 1!21 and the slot (slot 1) is conﬁgured for 2-pole operation. Changing the pole-mode of slot 1 to 4-pole operation makes channel 1!21 unavailable and clears the Channel Pattern.

4. Assume a Channel Pattern includes channel 1!1. If channel 1!1 is then added to the restricted channel list, the Channel Pattern is cleared.

5. Assume a Channel Pattern includes channel 1!1 and Card Pair is enabled. Note that with card pair enabled, channel 2!1 is then added as a restricted channel, the Channel Pattern will clear since one of its channels has become restricted.

Note that if a Channel pattern is included in the Scan List (i.e. M1) and the Channel Pattern is lost (as explained above), then the Scan List will also be lost (see paragraph 4.5.2).

Storing channel patterns

Perform the following steps to store a channel pattern in a memory location:

1. Press STORE. The following typical message will be displayed:

STORE CHANS AT #001

The above message indicates that the channel pattern will be stored at memory location M1.

NOTE

You can exit from the Store mode without storing the channel pattern by pressing EXIT. The instrument will return to the channel list display state.

2. If you wish to store the channel pattern at the displayed memory location, proceed to step 3. Otherwise, use the cursor keys ( and ) and the number keys to key in the desired memory location (001 to 100).

3. To store the channel pattern at the displayed memory location, press ENTER. The instrument will return to the channel status display state.

Step 1. Place instrument in channel list display state.

SELECT CHANNELS

Step 2. If there are any undesired channels currently closed, press OPEN ALL to open them.

Step 3. Enter channels that you wish to close.

Channel list entry is explained in paragraph 4.5.2. The following example demonstrates proper format:

SELECT CHANNELS 1!1, 1!2, 2!4,

The above channel list includes channels 1 and 2 of slot 1, and channel 4 of slot 2.

Step 4. Close channels.

Close the channels speciﬁed in the list by pressing CLOSE.

Step 5. Store the displayed channel pattern.

Recalling channel patterns

There are two ways to recall a channel pattern. One way is to immediately access the channel pattern from memory using RECALL. The open/close channel pattern will be displayed on the Model 7001 indicating the actual state of each channel. The other way is to specify the memory location (i.e. M1) of the channel pattern in the channel list and/or scan list. The closed channels in the channel pattern will close when that memory location is closed or scanned.

Recalling a channel pattern using RECALL

Perform the following steps to use RECALL:

1. While in channel list or scan list display states, press RECALL to display the following typical message:

RECALL CHANS AT #001

The above message indicates that the channel pattern will be recalled from memory location M1.

Perform the following steps to store the channel pattern:

4-21

Front Panel Operation

NOTE

You can exit from the Recall mode without recalling the channel pattern by pressing EXIT. The instrument will return to the channel list display state.

2. If you wish to recall the channel pattern from the displayed memory location, proceed to step 3. Otherwise, use the cursor keys ( and ) and the number keys to key in the desired memory location (001 to 100).

3. To recall the channel pattern from the displayed memory location, press ENTER. The instrument will return to the channel status display state and display the recalled channel pattern.

CAUTION

As soon as the display updates to the selected channel pattern, the corresponding relays on the card will also update. Thus, make sure you want to energize the card relays before recalling a channel pattern.

Recalling a channel pattern via channel list and/or scan list

A channel pattern can be recalled by specifying the memory location in a channel list and/or scan list. For example, assume a channel pattern that has Channels 2!11 and 2!36 closed is stored at memory location M10. Also assume that M10 is included in the following channel list:

SELECT CHANNELS 1!1, 1!4, M10,

When CLOSE is pressed with the above channel list displayed, Channels 1!1, 1!4, 2!11 and 2!36 will close.

Now assume the M10 is included in the following scan list:

SCAN CHANNELS 1!1, 1!4, M10, 1!6,

When M10 is selected in the scan, both Channels 2!11 and 2!36 will be closed at the same time and will remain closed when channel 1!6 is scanned.

4.6 MENU

Various instrument operations to conﬁgure the Model 7001 are performed using the front panel MENU. The MENU structure is shown and summarized in Table 4-

General rules to use MENU

1. The MAIN MENU is displayed by placing the instrument in the normal channel display state, and then pressing the MENU key. If already in the menu structure, the MAIN MENU can be displayed by pressing and releasing the EXIT key until the MAIN MENU selections are displayed (see next rule). The MAIN MENU selections are shown as follows:

MAIN MENU

SAVESETUP GPIB DIGITAL-I/O

TEST LANGUAGE GENERAL

2. Pressing the EXIT key causes the display to back up to the previous menu level. Also, keyed-in parameter changes are ignored if an EXIT is performed. When the MAIN MENU is displayed, pressing EXIT or MENU will disable MENU.

3. The position of the cursor is denoted by the blinking menu selection or parameter. The cursor is moved from one item to the next using the cursor keys ( and ).

4. A displayed arrow ( or ) indicates that there is more information or additional menu items to select from. When “ ” is displayed, use the cursor key to display the additional message(s); and conversely, when “ ” is displayed, use the

cursor key.

5. A numeric parameter is keyed in by placing the cursor on the digit to be changed, and pressing the appropriate key on the keypad. After keying in a number, the cursor will move to the next digit to the right.

6. A parameter change is only executed when the ENTER key is pressed.

7. ENTERing an invalid parameter generates an err or and ignores the entry.

8. The INFO key can be used anywhere in the menu structure to display helpful information messages concerning operation. To cancel an information message, press EXIT or INFO a second time.

4-22

Front Panel Operation

Table 4-2

MENU structure

Menu item Description

SAVESETUP Setup Menu:

SAVE Save setup at a memory location (up to 10). RESTORE Return 7001 to setup stored at a memory location. PWRON Power-on Menu:

FACTORY DEFAULT Power-on to factory default setup conditions. USER SETUP Power-on to setup stored at a memory location.

RESET Return 7001 to original power-on setup.

GPIB GPIB Setup Menu:

ADDRESS Check/change IEEE-488 address. STATUS Display IEEE-488 status byte.

DIGITAL-I/O Digital I/O Menu:

OUTPUT-STATUS Check/change states of digital output channels. OUTPUT-POLARITY Check/change polarity of digital output port. INPUT-STATUS Read digital input channel.

TEST Self-Test Menu:

BUILT-IN TESTS Test Digital Board:

AUTO Run all tests automatically MANUAL Select tests to run

DISPLAY TESTS Test Display Board:

KEYS Verify operation of front panel keys PATTERNS Verify operation of display CHAR SET Display ASCII character set.

LANGUAGE Choose 7001 Language:

ENGLISH Display messages in English. GERMAN Display messages in German. FRENCH Display messages in French.

GENERAL General Menu:

SERIAL # Displays serial number, SCPI version, and software revision. STATUS-MESSAGES Enables/disables status message mode. BREAK BEFORE MAKE Enables/disables Break-Before-Make.

4-23

Front Panel Operation

4.6.1 SAVESETUP

The SAVESETUP menu is used for the following operations:

• Save the current setup conditions in memory for future recall. Up to 10 setups can be saved in memory.

• Restore the instrument to setup conditions stored in memory.

• Setup the power-on (PWRON) conﬁguration. The instrument can be set to power-on to the factory default setup conditions, or power-on to the setup conditions stored at a speciﬁed memory location.

• Reset the instrument to the original power-on setup conditions (see Table 4-3).

Perform the following steps to display the SAVESETUP menu:

1. Display the MAIN MENU (see paragraph 4.6, General rule #1).

2. Use the cursor keys ( and ) to place the cursor on SAVESETUP, and press ENTER to access the following menu:

SETUP MENU

SAVE RESTORE PWRON RESET

SAVE 

conditions in memory at a speciﬁed memory location. To select SAVE, place the cursor on SAVE and press ENTER. The following typical message will be displayed:

1. To save the current setup at the displayed memory

2. To save the current setup to a different memory lo-

RESTORE 

ment to the setup conditions that are stored in memory at a speciﬁed memory location. To select RESTORE, place the cursor on RESTORE and press ENTER. The following typical message will be displayed:

Use this menu item to save the current setup

SAVE SETUP #0 (0-9)

location, press ENTER. The instrument will return to the SETUP MENU.

cation, key in a value (0 to 9) and press ENTER. The instrument will return to the SETUP MENU.

Use this menu item to return the instru-

1. To restore the instrument to the setup conditions stored at the displayed memory location, press ENTER. The instrument will return to the SETUP MENU.

2. To restore the instrument to the setup conditions stored at a different memory location, key in the memory location (0 to 9) and press ENTER. The instrument will return to the SETUP MENU.

PWRON 

Use this menu item to select the setup conditions that the instrument will power-on to. To select the PWRON menu item, place the cursor on PWRON and press ENTER. The following menu will be displayed:

SET POWER-ON DEFAULT

FACTORY-DEFAULT USER-SETUP

FACTORY DEFAULT 

ment will return to the factory default conditions (see Table 4-3) the next time it is turned on. To select the FACTORY-DEFAULT menu item, place the cursor on FACTORY-DEFAULT and press ENTER. The instrument will return to the SETUP MENU.

USER SETUP 

Using this selection, the instrument will power-on to the setup conditions saved at a speciﬁed memory location. T o select USER-SETUP, place the cursor on USER-SETUP and press ENTER. The following typical message will then be displayed:

PWRON DEFAULT = #0

1. To power-on to the setup conditions stored at the displayed memory location, press ENTER. The instrument will return to the SETUP MENU.

2. To power-on to setup conditions stored at a different memory location, key in the memory location (0 to 9) and press ENTER. The instrument will return to the SETUP MENU.

RESET 

Use this menu item to reset the instrument to the RESET default setup conditions (see Table 4-3). To select RESET , place the cursor on RESET and press ENTER. The following message will be displayed:

RESETTING INSTRUMENT

Press ENTER to display:

RESET COMPLETE

With this selection, the instru-

RESTORE SETUP #0

4-24

Press ENTER to return to the SETUP MENU.

Table 4-3

Default conditions

Item Factory default RESET

Channel status All open All open Channel list Cleared No change Scan list No change No change GPIB address No change No change Digital I/O output level High High Language No change No change Status messages Off Off # of poles No change No change Card pair Off Off Delay 0 sec 0 sec Channel spacing Manual (STEP key) Manual (STEP key) Number of channels Scan list length Scan list length Channel trigger control Source Source Scan spacing Immediate Immediate Number of scans Inﬁnite Inﬁnite Scan trigger control Acceptor Acceptor Arm spacing Immediate Immediate Arm count 1 1 Arm trigger control Acceptor Acceptor Single channel Off Off Restricted channels No change No change Break Before Make On On

Note: “No change” indicates that the currently set conditions are not affected.

Front Panel Operation

4.6.2 GPIB

The GPIB menu is used for the following operations:

• Check and/or change the address of the IEEE-488 bus.

• Display the status byte of the IEEE-488 bus.

Perform the following steps to display the GPIB menu:

1. Display the MAIN MENU (see paragraph 4.6, General rule #1).

2. Use the cursor keys ( and ) to place the cursor on GPIB, and press ENTER to display the following menu:

GPIB SETUP MENU

ADDRESS STATUS

ADDRESS 

Use this menu item to check and/or change the IEEE-488 address. At the factory the address is set to 7, but can be changed to any value from 0 to 30. To select ADDRESS, place the cursor on ADDRESS and press ENTER. If the address is currently set to 7, the following message will be displayed:

ADDRESS = 07 (0-30)

1. To retain the displayed address, press ENTER or EXIT. The instrument will return to the GPIB SETUP MENU.

2. To change the address, simply key in a valid value (0 to 30) and press ENTER. The instrument will return to the GPIB SETUP MENU.

STATUS 

Use this menu item to display the IEEE-488

status byte. Refer to Section 4 (IEEE-488 Reference) for

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Front Panel Operation

information on the status byte. T o select STATUS, place the cursor on STATUS and press ENTER. If for example, all bits of the status byte are reset to zero, it will be displayed as follows:

SHOW STATUS BYTE

EVA = 0 QSB = 0 MAV = 0 ESB = 0 MSS = 0 OSB = 0

When ﬁnished viewing the status byte, press either ENTER or EXIT . The instrument will return to the GPIB SETUP MENU.

4.6.3 DIGITAL-I/O

The DIGITAL-I/O menu is used for the following operations:

• Check and/or change the OUTPUT -ST ATUS (on or off) of the four digital output channels.

• Check and/or change the OUTPUT-POLARITY of the digital output port. Polarity can be active-high (on = +5V) or active-low (on = 0V).

mined by the polarity, which is controlled by the next menu item (OUTPUT-POLARITY). To select OUTPUTSTATUS, place the cursor on OUTPUT-STATUS and press ENTER. If for example, all the digital output channels are off, the following message will be displayed:

DIGITAL OUTPUT LINES

1 = OFF 2 = OFF 3 = OFF 4 = OFF

1. To retain the displayed states of the output channels, press ENTER or EXIT . The instr ument will return to the DIGITAL-I/O MENU.

2. To change the state of one or more digital output channels, perform the following steps:

A. Position the cursor at the channel that you wish

to change.

B. Press any one of the keys on the keypad. These

keys simple toggle between “ON” and “OFF”.

C. Repeat steps A and B for each channel that you

wish to change.

D. With the desired states displayed, press EN-

TER. The instrument will return to the DIGITAL-I/O MENU.

• Check the INPUT-STATUS (on or off) of the single digital input channel.

NOTE

The digital output port uses default levels of 0V and +5V. However, a user supplied voltage level of up to 30V can be used instead of the 5V level (see paragraph 4.9.1).

Perform the following steps to display the DIGIT AL-I/ O MENU:

1. Display the MAIN MENU (see paragraph 4.6, General rule #1).

2. Use the cursor keys ( and ) to place the cursor on DIGITAL-I/O and press ENTER to access the following menu:

DIGITAL-I/O MENU

OUTPUT-STATUS OUTPUT-POLARITY

INPUT-STATUS

OUTPUT-STATUS 

change the state (on or off) of the four digital output channels. The actual level of an “on” channel is deter-

Use this menu item to check and/or

OUTPUT-POLARITY 

Use this menu item to check and/ or change the polarity of the digital output port. The polarity of each channel can be active-high (ON = +5V) or active low (ON = 0V). To select OUTPUT-POLARITY, place the cursor on OUTPUT-POLARITY and press ENTER. The following message will be displayed:

SELECT OUTPUT LINE

TTL1 TTL2 TTL3 TTL4

1. Place the cursor on the appropriate channel and press ENTER. A message indicating the polarity of the selected channel will be displayed. For example:

TTL1 LOGIC SENSE

ACTIVE-HIGH ACTIVE-LOW

Cursor position will indicate the polarity of the channel.

2. To retain the currently selected polarity, press ENTER or EXIT. The display will return to the SELECT OUTPUT LINE MENU.

3. To change polarity, place the cursor on the alternate selection using the cursor keys ( or ) and press ENTER. The instrument will return to the SELECT OUTPUT LINE MENU.

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Front Panel Operation

4. When ﬁnished, press EXIT to return to the DIGITAL I/O MENU.

INPUT-STATUS 

the digital input channel. Polarity is ﬁxed at activehigh (ON = 5V).

To select INPUT-STATUS, place the cursor on INPUTSTATUS and press ENTER. If for example, the digital input channel is “on”, the following message will be displayed:

Use this menu item to read (on or off)

DIGITAL INPUT LINE

Status = ON

Press ENTER or EXIT to return the instrument to the Digital I/O Menu.

4.6.4 TEST

The TEST menu is to be used as a diagnostic tool to isolate problems with the Model 7001. Refer to Section 7 Maintenance for information on using these test procedures.

The cursor will be located on the currently selected language. Note that if a language other than English is currently selected, the menu will be displayed in the selected language.

3. To retain the currently selected language, press EXIT or ENTER. The display will return to the MAIN MENU.

4. To select one of the other languages, place the cursor on the desired language selection and press ENTER. The instrument will return to the MAIN MENU.

Note: The selected language becomes the powerup default.

4.6.6 GENERAL

The GENERAL MENU is used for the following operations:

• Serial # of the Model 7001.

• SCPI version control number.

• Softwar e revision level installed in the Model 7001.

4.6.5 LANGUAGE

The LANGUAGE menu is used to change the language for display messages. Language selections include:

• Display messages in ENGLISH.

• Display messages in GERMAN.

• Display messages in FRENCH.

Perform the following steps to change the language of menu display messages:

1. Display the MAIN MENU (see paragraph 4.6, General rule #1).

2. Use the cursor keys ( and ) to place the cursor on LANGUAGE and press ENTER. The following language menu selections will be displayed:

CHOOSE MENU LANGUAGE

ENGLISH GERMAN FRENCH

• Select the Status Message Mode.

Perform the following steps to display the GENERAL MENU:

1. Display the MAIN MENU (see General Rule #1, paragraph 4.6).

2. Use the cursor keys ( and ) to place the cursor on GENERAL and press ENTER. The following menu will be displayed:

GENERAL MENU

SERIAL # STATUS-MESSAGES

SERIAL # 

and software revision level of the instrument, place the cursor on SERIAL # and press ENTER. The following information will be displayed:

To display the serial number, SCPI version

Serial #XXXXXX

SCPI version #XXX.X software rev AXX/AYY

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Front Panel Operation

where; AXX is the software revision of the main CPU.

AYY is the software revision of the display CPU.

When ﬁnished, press ENTER or EXIT to return to the GENERAL MENU.

STATUS MESSAGES 

disable the status message mode. When enabled, status messages will be displayed to identify speciﬁc operations that are performed. Place the cursor on STATUSMESSAGES and press ENTER. The following message will be displayed:

This selection is used to enable or

STATUS MESSAGES

OFF ON

Place the cursor on the desired state (on or off) and press ENTER. The instrument will return to the GENERAL MENU.

Cursor position indicates the current state of Break-Before-Make.

Place the cursor on the desired state and press ENTER. The instrument will retrun to the GENERAL MENU.

NOTE

When ﬁnsihed with the GENERAL MENU, use EXIT to back out of the menu structure.

4.7 CARD CONFIG

Various operations to conﬁgure the slots of the mainframe are performed from the CARD CONFIG MENU. The menu structure is shown and summarized in Table 4-4.

General rules to use CARD CONFIG MENU:

BREAK-BEFORE-MAKE 

or disable Break-Before-Make. When enabled, the previous channel will open before the next channel closes during a scan. This ensures that two scanned channels will not be closed at the same time. When recalling a channel pattern from memory, all other channels will open before the channels in the pattern close.

When disabled, break-before-make is no longer ensured. During a scan, this could result in two channels closed momentarily at the same time. When recalling a channel pattern, the channels in the pattern could close before the previous channels open.

Break-Before-Make incorporates a delay to make sure that a channel(s) opens before the nect channel(s) closes. If Break-Before-Make is not necessary for your test system, you can increase scanning speed by disabling it.

Place the curor on BREAK-BEFORE-MAKE and press ENTER to display the following selections:

This selection is used to enable

BREAK BEFORE MAKE

ON OFF

1. The CARD CONFIG MENU is displayed by placing the instrument in the channel status display state, and then pressing the CARD CONFIGURATION key. If already in the menu structure, the CARD CONFIG MENU can be displayed by pressing and releasing the EXIT key until the CARD CONFIG MENU selections are displayed (see next rule). The CARD CONFIG MENU selections are shown as follows:

CARD CONFIG MENU

TYPE #-OF-POLES CARD-PAIR

DELAY READ-I/O-CARD

2. The EXIT key causes the display to back up to the previous menu level. Also, keyed-in parameter changes are ignored if an EXIT is performed. When the CARD CONFIG MENU is displayed, pressing EXIT will disable card conﬁguration.

3. The position of the cursor is denoted by the blinking menu selection or parameter. The cursor is moved from one item to the next using the cursor keys ( and ).

4. A displayed arrow ( or ) indicates that there is more information or additional menu items to select from. When “ ” is displayed, use the cursor key to display the additional message(s);

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Front Panel Operation

and conversely, when “ ” is displayed, use the

cursor key.

6. A parameter change is only executed when the ENTER key is pressed.

7. ENTERing an invalid parameter generates an err or and ignores the entry

8. The INFO key can be used anywhere in the menu structure to display helpful information messages concerning operation. To cancel an information message, press EXIT or INFO a second time.

4.7.1 TYPE

Use the TYPE feature to assign a model number to each non-701X series card installed in the mainframe. This menu selection also allows you to assign a slot to operate as a simulator. By assigning a slot the value 9990, the mainframe will operate as if a 40 channel multiplexer card is installed. If you assign a slot the value 9991, the mainframe will operate as if a 4 x 10 matrix card is installed in that slot. These simulators allow you to develop a test program even though the card is not installed in the mainframe.

The TYPE menu selection displays an assignment message for each slot. These messages were determined by the Model 7001 mainframe during its power-up sequence and is explained in paragraph 4.2.3. In general, the Model 7001 mainframe detects (on power-up) Model 701X series cards that are installed. All other type cards are not detected and thus, the slot must be assigned the appropriate model number by the user. This user assigned model number is “remembered” by the mainframe after it is turned off. However, if the mainframe detects a 701X series card in the slot on the subsequent power-up, it disregards the model number assigned by the user and assigns the model number of the 701X series card to the slot. You can use Table 4-5 to interpret the displayed messages for TYPE.

Each used slot must be assigned the correct model number (either automatically by the mainframe for 701X series cards or manually by the user) in order for the mainframe to operate correctly. The model number assignment automatically determines the settling time for the relays.

Changing a slot assignment (Card TYPE) could make a channel that is currently included in the Scan List and/ or a Channel Pattern unavailable. The unavailable channel causes the Scan List and/or the affected Channel Pattern to clear (see paragraphs 4.5.2 and 4.5.5 for details).

Table 4-4

CARD CONFIG MENU structure

Menu item Description

TYPE Set Card Type:

SLOT-1 Assign model number to card in slot 1. SLOT-2 Assign model number to card in slot 2.

#-OF-POLES Select # Of Poles:

SLOT-1 Select pole mode for card in slot 1.

SLOT-2 Select pole mode for card in slot 2. CARD-PAIR Enable or disable Card Pair. DELAY Set Delay For:

SLOT-1 Set delay for card in slot 1.

SLOT-2 Set delay for card in slot 2. READ-I/O-CARD Identify I/O Cards.

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Front Panel Operation

Table 4-5

TYPE assignments

Assignment message Interpretation*

SLOT-1 CARD: 701X** 701X series card installed in slot 1. SLOT-1 CARD: NONE No card installed in slot 1, or slot 1 is not assigned. SLOT-1 CARD: 7YYY*** Non-701X series model number assigned to slot 1 by the user. The card may or

may not be installed in the slot. Also, a different non-701X series card may be installed.

SLOT-1 CARD: 9990 Slot 1 assigned by user to simulate a 40-channel multiplexer. A non-701X card may

be installed.

SLOT-1 CARD: 9991 Slot 1 assigned by user to simulate a 4 × 10 matrix. A non-701X card may be

installed. SLOT-2 CARD: 701X** 701X series card installed in slot 2. SLOT-2 CARD: NONE No card installed in slot 2, or an unassigned card installed. SLOT-2 CARD: 7YYY*** Non-701X series model number assigned to slot 2 by the user. The card may or

may not be installed in the slot. Also, a different non-701X series card may be

installed. SLOT-2 CARD: 9990 Slot 2 assigned by user to simulate a quad 1 × 10 multiplexer. A non-701X card

may be installed. SLOT-2 CARD: 9991 Slot 2 assigned by user to simulate a 4 × 10 matrix. A non-701X card may be

installed.

* Assumes that power is cycled whenever a card is installed or removed from the mainframe. ** Model 701X series card, such as the Model 7011, 7012 or 7013. *** Models 7052 though 7402.

Perform the following steps to assign card TYPE.

1. Display the CARD CONFIG MENU (see paragraph 4.7, General rule #1).

2. Place the cursor on TYPE and press ENTER. The following message will be displayed:

SET CARD TYPE

SLOT-1 SLOT-2

SLOT-1 

and press ENTER. A message indicating the current slot assignment will be displayed. For example, if slot 1 was last assigned as a Model 7052, the following message will be displayed:

Note: If slot 1 is assigned as a Model 701X series card, you will not be able to change the assignment since that is the card that is actually installed in the slot. Press EXIT to return to the SET CARD TYPE menu.

To assign slot 1, place the cursor on SLOT-1

SLOT-1 CARD: 7052

1. Determine the correct assignment for slot 1 using the following guidelines:

A. If slot 1 is empty and is not going to be used, as-

sign it as “NONE”. This will turn off the front panel channel status display for slot 1 since it is not going to be used.

B. If using a non-701X series card (Models 7052

through 7402) that is installed in slot 1, assign slot 1 as that model number . For example, if the Model 7062 is installed in slot 1, assign slot 1 as “7062”

C. If slot 1 is going to be used to simulate a 40

channel mux, assign it as “9990”. To simulate a 4 × 10 matrix, assign it as “9991”. Note that a non-701X series card left installed will be controlled while using slot 1 as a simulator.

2. Use the cursor keys ( and ) to display the correct slot assignment. In general, the cursor key increments the displayed model number while the

cursor key decrements the model number.

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Front Panel Operation

3. With the correct slot assignment displayed, press ENTER. The display will return to the SET CARD TYPE menu.

SLOT-2 

and press ENTER. A message indicating the current slot assignment will be displayed. For example, if slot 2 was last assigned as a Model 7052, the following message will be displayed:

Note: If slot 2 is assigned as a Model 701X series card, you will not be able to change the assignment since that is the card that is actually installed in the slot. Press EXIT to return to the SET CARD TYPE menu.

1. Determine the correct assignment for slot 2 using

2. Use the cursor keys ( and ) to display the cor-

3. With the correct slot assignment displayed, press

To assign slot 2, place the cursor on SLOT-2

SLOT-2 CARD: 7052

the following guidelines: A. If slot 2 is empty and is not going to be used, as-

sign it as “NONE”. This will turn off the front panel channel status display for slot 1 since it is not going to be used.

B. If using a non-701X series card (Models 7052

through 7402) that is installed in slot 2, assign slot 2 as that model number . For example, if the Model 7062 is installed in slot 2, assign slot 2 as “7062”.

C. If slot 2 is going to be used to simulate a 40

channel mux, assign it as “9990”. To simulate a 4 × 10 matrix, assign it as “9991”. Note that a non-701X series card left installed will be controlled while using slot 2 as a simulator.

rect slot assignment. In general, the cursor key increments the displayed model number while the

cursor key decrements the model number.

ENTER. The display will return to the SET CARD TYPE menu.

Switch cards that have an additional pole mode capability are summarized as follows:

Pole Mode Card 1-Pole 2-Pole 4-Pole 7011 N/A 40 channels 20 channels

7056 20 channels 10 channels N/A 7156 20 channels 10 channels N/A

If you attempt to select an invalid pole mode, a settings conﬂict error will occur and the entry will be ignored.

Changing the pole mode for a slot could cause channels to become unavailable. As can be seen from the above table for the Model 7011 mux card, 20 channels become unavailable when changing from 2-pole to 4pole operation. If one or more of those unavailable channels were included in the Scan List and/or in a Channel Pattern, then the entire Scan List and/or the affected Channel Pattern will be lost (cleared). See paragraph 4.5.2 and 4.5.5 for details.

Perform the following steps to display the #-OFPOLES menu:

1. Display the CARD CONFIG MENU (see paragraph 4.7, General rule #1).

2. Place the cursor on #-OF-POLES and pr ess ENTER to access the following menu:

SELECT # OF POLES

SLOT-1 SLOT-2

SLOT-1 

mode for the card in slot 1. Place the cursor on SLOT-1 and press ENTER. The pole mode selections will be displayed. The cursor (ﬂashing menu item) indicates the currently selected pole mode.

Use this menu item to conﬁgure the pole

4.7.2 #-OF-POLES

The pole conﬁguration of some switching cards can be altered. For example, the Model 7011 is normally used as 2-pole, 40-channel multiplexer card. However, since Banks A and B can be isolated from Banks C and D, you can conﬁgure the card for 4-pole operation. In the 4pole mode, channels are paired together to form 20 4pole channels. See the Model 7011 Instruction Manual for details.

# OF POLES SLOT-1

1-POLE 2-POLE 4-POLE

1. To retain the displayed pole mode, press ENTER or EXIT. The instrument will return to the SELECT # OF POLES menu.

2. To change the displayed pole mode, place the cursor on the desired selection and press ENTER. The instrument will return to the SELECT # OF POLES menu.

4-31

Front Panel Operation

SLOT-2 

mode for the card in slot 2. Place the cursor on SLOT-2 and press ENTER. The pole mode selections will be displayed. The cursor (ﬂashing menu item) indicates the currently selected pole mode.

Use this menu item to conﬁgure the pole

# OF POLES SLOT-2

1-POLE 2-POLE 4-POLE

1. To retain the displayed pole mode, press ENTER or EXIT. The instrument will return to the SELECT # OF POLES menu.

2. To change the displayed pole mode, place the cursor on the desired selection and press ENTER. The instrument will return to the SELECT # OF POLES menu.

4.7.3 CARD-PAIR

The CARD-PAIR is used to enable (on) or disable (off) the CARD-PAIR feature of the Model 7001. CARDP AIR can be enabled to pair two similar type switching cards that have the same number of channels. When enabled, corresponding channels of both cards operate together as a pair. For example, closing Channel 4 of slot 1 will also close Channel 4 of slot 2. Conversely, closing Channel 5 of slot 2 will also close Channel 5 of slot 1. This feature is especially useful when performing four-wire scanning.

4. To select the alternate state, place the cursor on the selection and press ENTER. The instrument will return to the CARD CONFIG MENU.

4.7.4 DELAY

The DELAY feature sets a channel delay for each of the two cards installed in the mainframe. The delay can be set from 00000.001 seconds (1msec) to 99999.999 seconds. This delay is in addition to the internally set relay settling time delay.

This user programmed delay is the time delay between channels during a scan. The ﬁrst delay period occurs after the ﬁrst channel(s) closes. In other words, the programmed delay does not occur at the beginning of a scan.

Perform the following steps to set the delay:

1. Display the CARD CONFIG MENU (see paragraph 4.7, General rule #1).

2. Place the cursor on DELAY and press ENTER. The following message will be displayed:

SET DELAY FOR:

SLOT-1 SLOT-2

If enabling Card Pair adds a restricted channel to the Scan List and/or a Channel Pattern, then the entire Scan List and/or Channel Pattern is cleared. See paragraphs 4.5.2 and 4.5.5 for more information.

Perform the following steps to check or change the state of the CARD-PAIR feature:

1. Display the CARD CONFIG MENU (see paragraph 4.7, General rule #1).

2. Place the cursor on CARD-PAIR and press ENTER. The current state of the CARD-P AIR featur e will be indicated by the ﬂashing cursor:

SET CARD PAIR

OFF ON

3. To retain the displayed CARD-PAIR state, press ENTER or EXIT. The instrument will return to the CARD CONFIG MENU.

SLOT-1 

cursor on SLOT-1 and press ENTER. The currently set delay will be displayed. For example, if the card in slot 1 is set for a one second delay, the following message will be displayed:

1. To change the delay period, use the cursor keys

2. With the desired delay displayed, press ENTER.

SLOT-2 

cursor on SLOT-2 and press ENTER. The currently set delay will be displayed. For example, if the card in slot 2 is set for a 10 second delay, the following message will be displayed:

T o set the delay for the card in slot 1, place the

(1) DELAY = 00001.000

and the keypad to key in the desired value.

The instrument will return to the SET DELAY FOR: menu.

T o set the delay for the card in slot 2, place the

(2) DELAY = 00010.000

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Front Panel Operation

1. To change the delay period, use the cursor keys and the keypad to key in the desired value.

2. With the desired delay displayed, press ENTER. The instrument will return to the SET DELA Y FOR: menu.

card. If no I/O card is installed, the following message will be displayed:

No I/O Cards

3. Press EXIT to return to the CARD CONFIG MENU.

4.7.5 READ-I/O-CARD

This menu selection is used to identify if there are any I/O cards installed in the Model 7001.

4.8 SCAN CONFIG

1. Display the CARD CONFIG MENU (see paragraph 4.7, General Rule #1).

2. Place the cursor on READ-I/O-CARD and press ENTER to display the model number of the I/O

Table 4-6

CONFIGURE SCAN menu structure

Menu item Description

CHAN-CONTROL Conﬁgure Channel Layer:

CHANNEL-SPACING Select channel spacing:

TIMER Use a timer to select each channel in the scan. EXTERNAL Use an external trigger to select each channel. GPIB Use a bus trigger to select each channel. MANUAL Use STEP key to select each channel. TRIGLINK Use a Trigger Link trigger to select each channel.

ASYNCHRONOUS Use separate lines for In/Out triggers.

SEMI-SYNCHRONOUS Use same line for In/Out triggers. IMMEDIATE Use to scan channels immediately. HOLD Use to hold up the scan in the channel layer.

NUMBER-OF-CHANS Deﬁne number of channels to scan:

USE-SCANLIST-LENGTH Count = number of channel entries in scan list. CHAN-COUNT User deﬁned count:

INFINITE Repeat channel scanning indeﬁnitely.

ENTER-CHAN-COUNT Count = user deﬁned value (1 to 9999)

CONTROL Select trigger control mode:

SOURCE Enable the Source Bypass.

Various operations to conﬁgure a scan are performed from the CONFIGURE SCAN menu. The menu structure is shown and summarized in Table 4-6 (cont.).

4-33

Front Panel Operation

Table 4-6 (cont.)

CONFIGURE SCAN menu structure

Menu item Description

SCAN-CONTROL Conﬁgure Scan Layer:

SCAN-SPACING Select scan spacing:

TIMER Use the timer to control scan spacing. EXTERNAL Use external triggers to control scan spacing. GPIB Use bus triggers to control scan spacing. MANUAL Use STEP key to control scan spacing. TRIGLINK Use Trigger Link triggers to control scan spacing. IMMEDIA TE Use to pass operation immediately into the channel layer. HOLD Use to hold up the scan in the scan layer.

NUMBER-OF-SCANS Deﬁne number of scans to be performed:

INFINITE Repeat scan indeﬁnitely. ENTER-SCAN-COUNT Count = user deﬁned value (1 to 9999).

CONTROL Select trigger control mode:

SOURCE Enable Source Bypass. ACCEPTOR Disable Source Bypass.

ARM-CONTROL Conﬁgure Arm Layer:

ARM SPACING Select arm spacing control:

MANUAL Use STEP key to arm scanner. IMMEDIATE Use to arm scanner immediately. GPIB Use a bus trigger to arm scanner. EXTERNAL Use an external trigger to arm scanner. TRIGLINK Use a Trigger Link trigger to arm scanner. HOLD Use to hold up the scan in the arm layer.

ARM-COUNT Deﬁne number of times to arm scanner:

INFINITE Continuously re-arm scanner. ENTER-ARM-COUNT User deﬁned count value (1 to 9999).

TRIGGER-CONTROL Select trigger control mode:

SOURCE Enable Source Bypass. ACCEPTOR Disable Source Bypass.

CHAN-RESTRICTIONS Deﬁne channel restrictions:

SINGLE-CHAN Enable/disable Single Channel Mode RESTRICTED-CHANNELS Designate channels that cannot be closed.

General rules to use CONFIGURE SCAN:

1. The CONFIGURE SCAN menu is displayed by placing the instrument in the channel status display state, and then pressing the SCAN CONFIGURATION key. If already in the menu structure, the CONFIGURE SCAN menu can be displayed by pressing and releasing the EXIT key until the CONFIGURE SCAN menu selections are dis-

4-34

played (see next rule). The CONFIGURE SCAN menu selections are shown as follows:

CONFIGURE SCAN

CHAN-CONTROL SCAN-CONTROL

ARM-CONTROL CHAN-RESTRICTIONS

2. The EXIT key causes the display to back up to the previous menu level. Also, keyed-in parameter

Front Panel Operation

changes are ignored if an EXIT is performed. When the CONFIGURE SCAN menu is displayed, pressing EXIT will disable SCAN CONFIGURATION.

3. The position of the cursor is denoted by the blinking menu selection or parameter. The cursor is moved from one item to the next using the cursor keys ( and ).

4. A displayed arrow ( or ) indicates that there is more information or additional menu items to select from. When “ ” is displayed, use the cursor key to display the additional message(s), and conversely, when “ ” is displayed, use the

cursor key.

6. A parameter change is only executed when the ENTER key is pressed.

7. ENTERing an invalid parameter generates an err or and ignores the entry.

8. The INFO key can be used anywhere in the menu structure to display helpful information messages concerning operation. To cancel an information message, press EXIT or INFO a second time.

CHANNEL SPACING 

Use this menu item to select the event that controls the time period between channel closures of the scan. With the CHANNEL CONTROL menu displayed, select this menu item by placing the cursor on CHANNEL-SP ACING and pr essing ENTER. The following menu will be displayed:

SELECT CHAN SPACING

TIMER EXTERNAL GPIB MANUAL

TRIGLINK IMMEDIATE HOLD

Timer 

timer is used to set a time interval between channel closures of the scan. The timer can be set for an interval from zero to 99999.999 seconds with 0.001 second (1msec) resolution. The ﬁrst interval begins after the ﬁrst channel of the scan closes. Perform the following steps to use the timer:

1. With the SELECT CHAN SPACING menu dis-

Use the timer to control channel spacing. The

played, place the cursor on TIMER and press ENTER. A message indicating the currently set time interval (in seconds) will be displayed. If, for example the timer is set to 1msec, the following message will be displayed:

INTERVAL = 00000.001

4.8.1 CHAN-CONTROL

Channel control is used for the following operations:

• To select the event that controls the time period (CHANNEL SPACING) between channel closures of a scan.

• Designate the NUMBER OF CHANS (channels) in the scan.

• Enable or disable the Source Bypass.

Perform the following steps to display the CHANNEL CONTROL menu:

1. Display the CONFIGURE SCAN menu (see paragraph 4.8, General rule #1).

2. Use the cursor keys ( and ) to place the cursor on CHAN-CONTROL and press ENTER to access the following menu:

CHANNEL CONTROL

CHANNEL-SPACING NUMBER-OF-CHANS

CONTROL

2. To retain the displayed timer interval, press EXIT or ENTER. The instrument will return to the CHANNEL CONTROL menu.

3. To set a different time interval, use the keypad to key in the value (in seconds) and press ENTER. The instrument will return to the CHANNEL CONTROL menu.

Note: The front panel STEP key (see MANUAL) is active with the timer selected. Each press of the STEP key will select the next channel of the scan. This can be used to quickly step through a scan that has a relatively long timer interval.

External 

With this selection, external triggers are used to control channel spacing for the scan. Each trigger stimulus applied to the Model 7001 will open the current channel and close the next channel of the scan. The external trigger is applied to the rear panel “EXTERNAL TRIGGER” BNC connector. In the external trigger mode, the Model 7001 can be used to trigger another instrument. After a channel is closed and settled, a trigger pulse is applied to the rear panel “CHANNEL READY” BNC connector . This trigger pulse can, for ex-

4-35

Front Panel Operation

ample, be used to trigger a DMM to take a reading. External triggering is covered in detail in paragraph 4.10.

Select external triggering from the SELECT CHAN SPACING menu by placing the cursor on EXTERNAL and pressing ENTER. The instrument will return to the CHANNEL CONTROL menu.

Note: The front panel STEP key (see MANUAL) is active with external triggering selected. Each press of the STEP key will select the next channel of the scan.

GPIB 

With this selection, bus triggers ar e used to control channel spacing for the scan. Each trigger sent over the bus (GET or *TRG) will open the current channel and close the next channel of the scan. See Section 5 for detailed information on bus triggers.

Select bus triggering from the SELECT CHAN SPACING menu by placing the cursor on GPIB and pressing ENTER. The instrument will return to the CHANNEL CONTROL menu.

Note: The front panel STEP key (see MANUAL) is active with bus triggering selected. Each press of the STEP key will select the next channel of the scan.

Manual 

With this selection, the front panel STEP key is used to control channel spacing. Each time the STEP key is pressed, the current channel of the scan will open and the next channel will close.

Select manual triggering from the CHANNEL SPACING menu by placing the cursor on MANUAL and pressing ENTER. The instrument will return to the CHANNEL CONTROL menu.

Note: The front panel STEP key is active when TIMER, EXTERNAL, GPIB or TRIGGER LINK is selected.

Triglink 

With this selection, channel spacing of the

scan is controlled by the Trigger Link of the Model

7001. Trigger Link is an enhanced trigger system that uses up to six lines to direct trigger pulses to and from other instruments. Each trigger stimulus applied to the Model 7001 will open the current channel and close the next channel of the scan. See paragraph 4.11 for details on using the Trigger Link.

Note: The front panel STEP key (see MANUAL) is active with Trigger Link selected. Each press of the STEP key will select the next channel of the scan.

Select the T rigger Link from the SELECT CHAN SPACING menu by placing the cursor on TRIGLINK and pressing ENTER. The following menu will be displayed:

SET TRIGGERLINK MODE

ASYNCHRONOUS SEMI-SYNCHRONOUS

ASYNCHRONOUS 

mode is used for trigger conﬁgurations that require input and output triggers to be routed on separate lines. Perform the following steps to select the asynchronous mode, and to select the input and output trigger lines for the Model 7001:

1. With the SET TRIGGERLINK MODE menu displayed, place the cursor on ASYNCHRONOUS and press ENTER. The following message will be displayed:

SELECT INPUT LINE #1 #2 #3 #4 #5 #6

The position of the cursor indicates the currently selected input line.

2. To select a trigger input line for the Model 7001, place the cursor on the desired line number and press ENTER. The following message will be displayed:

SELECT OUTPUT LINE #1 #2 #3 #4 #5 #6

The position of the cursor indicates the currently selected output line.

3. To select a trigger output line for the Model 7001, place the cursor on a different line number and press ENTER. The instrument will return to the SET TRIGGERLINK MODE menu. Note that you cannot use the same trigger line for both input and output.

SEMI-SYNCHRONOUS

put triggers for the Model 7001 are assigned to the same line. Perform the following steps to select the semi-synchronous mode, and to select the trigger line:

The asynchronous trigger link

 In this mode, the input and out-

4-36

Front Panel Operation

1. With the SET TRIGGERLINK MODE menu displayed, place the cursor on SEMI-SYNCHRONOUS and press ENTER. The following message will be displayed:

SET SEMI-SYNC LINE #1 #2 #3 #4 #5 #6

The position of the cursor indicates the currently selected trigger line.

2. To select a trigger line for the Model 7001, place the cursor on the desired line number and press ENTER. The instrument will return to the SET TRIGGERLINK MODE menu.

Immediate 

With this selection, events (such as the TIMER and EXTERNAL triggers) do not control channel spacing. Once the scan starts, the Model 7001 will step through it as fast as the internal settling time and user programmed delay (see paragraph 4.7) will allow .

Select immediate triggering from the SELECT CHAN SP ACING menu by placing the cursor on IMMEDIATE and pressing ENTER. The instrument will return to the CHANNEL CONTROL menu.

Hold 

When HOLD is selected, channel spacing is suppressed. As a result the, scan is stopped and will not continue until HOLD is cancelled by selecting another channel spacing selection. Select trigger hold from the SET CHAN SPACING menu by placing the cursor on HOLD and pressing ENTER. The instrument will return to the CHANNEL CONTROL menu.

NUMBER OF CHANS 

Use this menu item to deﬁne the number of channels to be scanned. With the CHANNEL CONTROL menu displayed, select this menu item by placing the cursor on NUMBER-OF-CHANS and pressing ENTER. The following menu will be displayed:

NUMBER OF CHANNELS

USE-SCANLIST-LENGTH CHAN-COUNT

Use-scanlist-length 

channels in the scan will be determined by the number of channels deﬁned in the scan list. For example, if the scan list is made up of channels 1!1, 1!2, 1!3 and 1!4, the number of channels to be scanned will be four. Select scan list length count from the NUMBER OF CHAN-

With this selection, the number of

NELS menu by placing the cursor on USE-SCANLISTLENGTH and pressing ENTER. The display will return to the CHANNEL CONTROL menu.

Chan-count 

With this selection, the user determines the number (count) of channels to scan. The user programmed count can be smaller , equal to, or lar ger than the number of channels in the scan list. For example, if the scan list is made up of four channels (1!1, 1!2, 1!3 and 1!4), the user can program a count of 12. With this count value, the instrument will repeat the channel scan three times. An advantage of repeating channels (rather than scans) is that delays in the scan layer of operation (SCAN CONTROL) are avoided. The channel spacing delay between all 12 channels are the same.

Select CHAN-COUNT from the NUMBER OF CHANNELS menu by placing the cursor on CHAN-COUNT and pressing ENTER. The following menu will be displayed:

CHANNEL COUNT

INFINITE ENTER-CHAN-COUNT

INFINITE

scan. With the CHANNEL COUNT menu displayed, select this menu item by placing the cursor on INFINITE and pressing ENTER. The display will return to the CHANNEL CONTROL menu.

ENTER-CHAN-COUNT 

number of channels in the scan. Perform the following steps to deﬁne a ﬁnite count:

CONTROL 

source bypass. The source bypass is used to bypass the channel spacing event on the ﬁrst pass through the



Use this selection to continuously repeat the

Use this selection to define the

1. With the CHANNEL COUNT menu displayed, place the cursor on ENTER-CHAN-COUNT and press ENTER. A message indicating the current count will be displayed.

CHANNEL COUNT = 0010

The above message indicates that the current count is set to 10.

2. To program for a different count (1 to 9999), use the keypad to enter the count value.

3. With the desired count value displayed, press ENTER. The display will return to the CHANNEL CONTROL menu.

Use this menu item to enable or disable the

4-37

Front Panel Operation

scan. With the CHANNEL CONTROL menu displayed, select this menu item by placing the cursor on CONTROL and pressing ENTER. The following menu will be displayed:

TRIGGER CONTROL

SOURCE ACCEPTOR

Source

 With this selection, the source bypass is en-

abled. The channel spacing event will be bypassed on the first pass through the channel layer if EXTERNAL or TRIG LINK channel spacing is selected. This will allow the first channel in the scan to close without having to wait for the programmed event.

Acceptor

 W ith this selection, the sour ce bypass is dis-

abled.

4.8.2 SCAN CONTROL

Scan control is used for the following operations:

• To select the event that controls scan spacing.

• Designate the NUMBER-OF-SCANS to be performed.

• Enable or disable the Source Bypass.

Perform the following steps to display the SCAN CONTROL menu:

1. Display the CONFIGURE SCAN menu (see paragraph 4.8, General rule #1).

2. Use the cursor keys ( and ) to place the cursor on SCAN-CONTROL and press ENTER to access the following menu:

SCAN CONTROL

SCAN-SPACING NUMBER-OF-SCANS

CONTROL

Timer 

Use the timer feature to control scan spacing. The timer is used to set a time interval between scans. The timer can be set for an interval from zero to

99999.999 seconds with 0.001 second (1msec) resolution. After a scan is triggered to start, the next scan will start at the end of the programmed timer interval. If however, the programmed timer interval is shorter than the time it takes to complete a single scan, the next scan will not start until the previous scan is completed.

Note: The front panel STEP key (see MANUAL) is active with the timer selected. Pressing the STEP key after the completion of a scan will start the next scan (assuming the Model 7001 is programmed for another scan; see NUMBER OF SCANS).

Perform the following steps to use the timer:

1. With the SELECT SCAN SPACING menu displayed, place the cursor on TIMER and press ENTER. A message indicating the currently set time interval (in seconds) will be displayed:

INTERVAL = 00000.001

2. To retain the displayed timer interval, press EXIT or ENTER. The instrument will return to the SELECT SCAN CONTROL menu.

3. To set a different time interval, use the keypad to key in the value (in seconds) and press ENTER. The instrument will return to the SCAN CONTROL menu.

External 

With this selection, external triggers are used to control scan spacing. A trigger stimulus applied to the Model 7001 will pass operation into the channel layer . The external trigger is applied to the rear panel “EXTERNAL TRIGGER” BNC connector. See paragraph 4.10 for detailed information on external triggering.

SCAN-SPACING 

Use this menu item to select the event that controls the time period between scans. With the SCAN CONTROL menu displayed, select this menu item by placing the cursor on SCAN-SPACING and press ENTER. The following menu will be displayed:

SELECT SCAN SPACING

TIMER EXTERNAL GPIB MANUAL

TRIGLINK IMMEDIATE HOLD

4-38

Note: The front panel STEP key (see MANUAL) is active with external triggering selected. Pressing the STEP key after the completion of a scan will start the next scan (assuming the Model 7001 is programmed for another scan; see NUMBER OF SCANS).

Select external triggering from the SELECT SCAN SPACING menu by placing the cursor on EXTERNAL and pressing ENTER. The display will return to the SCAN CONTROL menu.

Front Panel Operation

GPIB 

With this selection, bus triggers ar e used to control scan spacing. Operation will pass into the channel layer when a bus trigger (GET or *TRG) is received by the Model 7001. See Section 5 for detailed information on bus triggers.

Note: The front panel STEP key (see MANUAL) is active with bus triggering selected. Pressing the STEP key after the completion of a scan will start the next scan (assuming the Model 7001 is programmed for another scan; see NUMBER OF SCANS).

Select bus triggering from the SELECT SCAN SPACING menu by placing the cursor on GPIB and pressing ENTER. The display will return to the SCAN CONTROL menu.

Manual 

With this selection, the front panel STEP key is used to control scan spacing. Operation will pass into the channel layer when STEP is pressed.

Note: The front panel STEP key is active when TIMER, EXTERNAL, GPIB or TRIGGER LINK is selected.

Select manual triggering from the SELECT SCAN SPACING menu by placing the cursor on MANUAL and pressing ENTER. The instrument will return to the SCAN CONTROL menu.

Triglink 

With this selection, scan spacing is contr olled by the Trigger Link of the Model 7001. Trigger Link is an enhanced trigger system that uses up to six lines to direct trigger pulses to and from other instruments. Operation passes into the channel layer when the Model 7001 receives a trigger over the Trigger Link. See paragraph 4.11 for details on using the Trigger Link.

Note: The front panel STEP key (see MANUAL) is active with the Trigger Link selected. Pressing the STEP key after the completion of a scan will start the next scan (assuming the Model 7001 is programmed for another scan; see NUMBER OF SCANS).

Select the Trigger Link from the SELECT SCAN SPACING menu by placing the cursor on TRIGLINK and pressing ENTER. The following menu will be displayed:

SELECT INPUT LINE #1 #2 #3 #4 #5 #6

The position of the cursor indicates the currently selected input line.

To select a trigger input line for the Model 7001, place the cursor on the desired line number and press ENTER. The following message will be displayed:

SELECT OUTPUT LINE #1 #2 #3 #4 #5 #6

The position of the cursor indicates the currently selected output line.

To select a trigger output line for the Model 7001, place the cursor on a different line number and press ENTER. Note that you cannot use the same trigger line for both input and output.

Immediate 

With IMMEDIATE selected, operation passes immediately into the channel layer. Select immediate scanning from the SELECT SCAN SPACING menu by placing the cursor on IMMEDIA TE and pressing ENTER. The instrument will return to the SCAN CONTROL menu.

Hold 

When HOLD is selected, scan spacing is suppressed. As a result, operation will not continue until HOLD is cancelled by selecting one of the other scan spacing selections. Select HOLD from the SELECT SCAN SPACING menu by placing the cursor on HOLD and pressing ENTER. The instrument will return to the SCAN CONTROL menu.

NUMBER-OF-SCANS 

Use this menu item to deﬁne the number of scans to be performed by the Model 7001. With the SCAN CONTROL menu displayed, select this menu item by placing the cursor on NUMBER-OFSCANS and press ENTER. The following menu will be displayed:

NUMBER OF SCANS

INFINITE ENTER-SCAN-COUNT

Infinite 

scan. Select continuous scanning from the NUMBER OF SCANS menu by placing the cursor on INFINITE and pressing ENTER. The display will return to the SCAN CONTROL menu.

Use this selection to continuously repeat the

4-39

Front Panel Operation

Enter-Scan-Count 

With this selection, the user determines the number of scans to perform. You can program the Model 7001 to perform from 1 to 9999 scans. For example, if you enter a scan count of 10, the programmed scan will be performed 10 times. Perform the following steps to enter the scan count:

1. With the NUMBER OF SCANS menu displayed, place the cursor on ENTER-SCAN-COUNT and press ENTER. A message indicating the current scan count will be displayed.

SCAN COUNT = 0001

The above scan count indicates that the Model 7001 will perform one scan. A value of “0000” indicates that the scan count is set to inﬁnite.

2. To program for a different count (1 to 9999), use the keypad to enter the count value.

3. With the desired count value displayed, press ENTER. The display will return to the SCAN CONTROL menu.

• Designate the number of times the scanner is to be armed (ARM COUNT)

• Enable or disable the Source Bypass.

Perform the following steps to display the ARM CONTROL menu:

1. Display the CONFIGURE SCAN menu (see paragraph 4.8, General rule #1).

2. Use the cursor keys ( and ) to place the cursor on ARM CONTROL and press ENTER to access the following menu:

SETUP ARM CONTROL

ARM-SPACING ARM-COUNT

TRIGGER-CONTROL

ARM-SPACING 

event that controls the arm spacing. T o select this menu item, place the cursor on ARM-SPACING and press ENTER. The following menu will be displayed:

This menu item is used to select the

CONTROL 

Use this menu item to enable or disable the source bypass. The source bypass is used to bypass the scan spacing event on the ﬁrst pass through the scan. With the SCAN CONT ORL menu displayed, select this menu item by placing the cursor on CONTROL and pressing ENTER. The following menu will be displayed:

TRIGGER CONTROL

SOURCE ACCEPTOR

Source

 With this selection, the source bypass is en-

abled. The scan spacing event will be bypassed on the first pass through the scan layer if EXTERNAL or TRIG LINK scan spacing is selected. This will allow operation to proceed on into the channel layer without having to wait for the programmed event.

Acceptor

 W ith this selection, the sour ce bypass is dis-

abled.

4.8.3 ARM CONTROL

ARM SPACING

MANUAL IMMEDIATE GPIB

EXTERNAL TRIGLINK HOLD

Manual 

is used to control arm spacing. Operation will pass into the scan layer when the STEP key is pressed.

Note: The front panel STEP key is active when TIMER, EXTERNAL, GPIB or TRIGGER LINK is selected.

To select manual triggering (STEP key) from the SELECT ARM SPACING menu, place the cursor on MANUAL and press ENTER. The instrument will return to the SETUP ARM CONTROL menu.

Immediate 

mediately into the scan layer.

Select immediate triggering from the SELECT ARM SP ACING menu by placing the cursor on IMMEDIATE and pressing ENTER. The instrument will return to the SETUP ARM CONTROL menu.

With this selection, the front panel STEP key

With this selection, operation will pass im-

Arm control is used for the following operations:

• To select the arming event (ARM SPACING) for

the scanner.

4-40

GPIB 

With this selection, bus triggers ar e used to control arm spacing. Operation will pass immediately into the scan layer when a bus trigger (GET or *TRG) is re-

Front Panel Operation

ceived by the Model 7001. See Section 5 for detailed information on bus triggers.

Note: The front panel STEP key (see MANUAL) is active with bus triggering selected. Pressing the STEP key will pass operation into the scan layer.

To select bus triggering from the SELECT ARM SPACING menu, place the cursor on GPIB and press ENTER. The display will return to the SETUP ARM CONTROL menu.

External 

With this selection, external triggers are used to control arm spacing. A trigger stimulus applied to the Model 7001 will pass operation into the scan layer . The external trigger is applied to the rear panel “EXTERNAL TRIGGER” BNC connector. See paragraph

4.10 for detailed information on external triggering.

Note: The front panel STEP key (see MANUAL) is active with external triggering selected. Pressing the STEP key will pass operation into the scan layer.

To select external triggering from the SELECT ARM SPACING menu, place the cursor on EXTERNAL and press ENTER. The instrument will return to the SETUP ARM CONTROL menu.

Triglink 

With this selection, arm spacing is contr olled by the Trigger Link of the Model 7001. Trigger Link is an enhanced trigger system that uses up to six lines to direct trigger pulses to and from other instruments. Operation passes into the scan layer when the Model 7001 receives a trigger over the Trigger Link. See paragraph 4.11 for details on using the Trigger Link.

Note: The front panel STEP key (see MANUAL) is active with the Trigger Link selected. Pressing the STEP key will pass operation into the scan layer.

To select a trigger input line for the Model 7001, place the cursor on the desired line number and press ENTER. The following message will be displayed:

SELECT OUTPUT LINE #1 #2 #3 #4 #5 #6

The position of the cursor indicates the currently selected output line.

To select a trigger output line for the Model 7001, place the cursor on a different line number and press ENTER. Note that you cannot use the same trigger line for both input and output.

Hold 

When HOLD is selected, arm spacing is suppressed. As a result, operation will not pass into the scan layer until HOLD is cancelled by selecting one of the other arm spacing selections. Select HOLD from the SELECT ARM SPACING menu by placing the cursor on HOLD and pressing ENTER. The instrument will return to the SETUP ARM CONTROL menu.

ARM-COUNT 

This menu item is used to define the number of times operation will return to the arm layer. With the SETUP ARM CONTROL menu displayed, select this menu item by placing the cursor on ARMCOUNT and press ENTER. The following menu will be displayed:

ARM COUNT

INFINITE ENTER-ARM-COUNT

Infinite 

eration to the arm layer . Select continuous arming from the ARM COUNT menu by placing the cursor on INFINITE and pressing ENTER. The display will return to the SETUP ARM CONTROL menu.

Use this selection to continuously return op-

To select the Trigger Link from the SELECT ARM SPACING menu, place the cursor on TRIGLINK and press ENTER. The following menu will be displayed:

SELECT INPUT LINE #1 #2 #3 #4 #5 #6

The position of the cursor indicates the currently selected input line.

Enter-Arm-Count 

With this selection, the user determines the number of times operation returns to the arm layer. You can program the Model 7001 to arm up to 9999 times. Perform the following steps to enter the arm count:

1. With the ARM COUNT menu displayed, place the cursor on ENTER-ARM-COUNT and press ENTER. A message indicating the current arm count will be displayed.

ARM COUNT = 0001

4-41

Front Panel Operation

The above arm count indicates that the scanner will arm one time. An arm count of “0000” indicates that inﬁnite is selected.

2. To program for a different count (1 to 9999), use the keypad to enter the count value.

3. With the desired count value displayed, press ENTER. The display will return to the SETUP ARM CONTROL menu.

TRIGGER CONTROL 

Use this menu item to enable or disable the source bypass. The source bypass is used to bypass the arm spacing event on the ﬁrst pass through the scan. With the SETUP ARM CONTROL menu displayed, select this menu item by placing the cursor on TRIGGER-CONTROL and pressing ENTER. The following menu will be displayed:

TRIGGER CONTROL

SOURCE ACCEPTOR

Source

abled. The arm spacing event will be bypassed on the first pass through the arm layer if EXTERNAL or TRIG LINK arm spacing is selected. This will allow operation to proceed on into the scan layer without having to wait for the programmed event.

Acceptor

abled.

 With this selection, the source bypass is en-

 W ith this selection, the sour ce bypass is dis-

2. Use the cursor keys ( and ) to place the cursor on CHAN-RESTRICTIONS, and press ENTER to access the following menu:

CHANNEL RESTRICTIONS

SINGLE-CHAN RESTRICTED-CHANNELS

SINGLE-CHAN 

Use this menu item to enable or disable the single channel mode. With the single channel mode enabled (ON), only one channel can be closed. Two or more channels cannot be closed at the same time.

Perform the following steps to enable or disable the single channel mode:

1. With the CHANNEL RESTRICTIONS menu displayed, place the cursor on SINGLE-CHAN and press ENTER. The following message will be displayed:

SINGLE CHANNEL MODE

OFF ON

Cursor position indicates the current status of the single channel mode.

2. Place the cursor on the desired state (ON or OFF) and press ENTER. The display will return to the CHANNEL RESTRICTIONS menu.

4.8.4 Channel restrictions

The Model 7001 can be programmed for the following channel restrictions:

• The user can enable the SINGLE CHAN (channel) mode to prevent more than one channel from being closed at the same time.

• The user can deﬁne a list of RESTRICTED CHANNELS. Channels in this list cannot be closed.

Perform the following steps to display the CHANNEL RESTRICTIONS menu:

1. Display the CONFIGURE SCAN menu (see paragraph 4.8, General rule #1).

Operating Notes:

1. For Single Channel, when more than one channel is assigned to a channel list, only the lowest numbered channel in the lowest numbered slot will close when CLOSE is pressed. For example, assume the following channel list is deﬁned:

SELECT CHANNELS 2!1, 2!2, 1!5 When CLOSE is pressed, Channel 1!5 will close.

2. When the single channel mode is enabled, all stored channel patterns are cleared. For example, if closed Channels 1!1 and 1!2 are stored at memory location #001 (M1), enabling single channel will clear that memory location.

3. The single channel mode cannot be enabled if two or more channels are currently closed.

4-42

Front Panel Operation

RESTRICTED-CHANNELS  Used to designate channels that cannot be closed from either the front or over the bus. This is primarily used as a safety feature to prevent the inadvertent closing of a channel(s) that could cause damage to instrumentation or DUT (i.e. shorting a power supply in a matrix test system).

If you specify a channel to be restricted and it is already included in the Scan List and/or a Channel Pattern, a saved state error (+510) occurs and the entire Scan List and/or Channel pattern is cleared (lost)/ See paragraphs 4.5.2 and 4.5.5 for more information.

Perform the following steps to deﬁne the restricted channels:

Pin 5 - Digital Output #2

Pin 6 - Digital Output #3

Pin 7 - Digital Output #4

1. With the CHANNEL RESTRICTIONS menu displayed, place the cursor on RESTRICTED-CHANNELS and press ENTER. The following message will be displayed:

RESTRICTED CHANNELS

SELECT CHANNELS

2. Use the keypad to enter the channel list and press EXIT.

4.9 Digital I/O port

The Model 7001’s Digital I/O port is an 8-pin microDIN socket (J1007) located on the rear panel. Figure 4-9 shows a simpliﬁed schematic containing pin designations.

10Ω

Pin 3 - External Voltage Flyback connection (+5V to +30V)

+5V

Digital Output Flyback Diodes

Figure 4-9

Digital I/O port simpliﬁed schematic

Pin Designations 1 = Digital In

2 = N/C 3 = V

4 = Digital Output #1 5 = Digital Output #2 6 = Digital Output #3 7 = Digital Output #4 8 = Digital Ground

fly-back connection (+5V to +30V)

ext

10kΩ

Pin 4 - Digital Output #1 Pin 5 - Digital Output #2 Pin 6 - Digital Output #3 Pin 7 - Digital Output #4

Pin 8 - Digital Ground

DIGITAL

OUT

(Connector J1007)

4-43

Front Panel Operation

The Model 7001’s Digital I/O port can be used to control external circuitry. The port provides four output lines and one input line. Each open-collector output can be set high (+5V) or low (0V) and will sink up to 100mA. The four output lines can also operate external supplies from +5V to +30V.

Use the DIGITAL I/O MENU to select the following options (information about each menu item is contained in paragraph 4.6.3):

• OUTPUT-STATUS ON or OFF selectable for each output line (1

through 4). Use this option to check or change the output state. For example, the following OUTPUTSTATUS display is set to ON for digital output #1, while outputs #2 through #4 are set to OFF:

DIGITAL OUTPUT LINES

1=ON 2=OFF 3=OFF 4=OFF

Changing the display to the following turns digital output #1, #3, #4 to OFF and output #2 to ON.

DIGITAL OUTPUT LINES

1=OFF 2=ON 3=OFF 4=OFF

• OUTPUT-POLARITY

4.9.1 Controlling digital circuitry

Each of the four digital, open-collector outputs (connector J1007, pins 4 through 7) includes a built-in pull up resistor to +5V. The output transistor is capable of sinking up to 100mA at voltages up to +30V.

Early versions of the Model 7001 have an additional 10kΩ resistor connected between the collector and the internal built-in test circuitry. Under certain combinations of output states, this resistor limits the output high to 2.5V. For example:

Output #1 set high (+5V) Outputs #2, #3, and #4 set low (0V) Actual output of digital output #1 is restricted to +2.5V

If using the digital output to sink current from external devices a Model 7001 containing the additional 10kΩ resistors will function correctly. The transistor switch is open restricting current ﬂow through the external device in the high state (+5V). However, if the output is directly used as an input to a typical logic input, the

2.5V high state may not be reliably detected as a high. To correct this condition (if a 2.5V high is unacceptable), use one of the following solutions:

ACTIVE-HIGH or ACTIVE-LOW selectable for each output line (TTL1 through TTL4). Use to check or change the logic sense. Select the desired output line (TTL1 through TTL4), and check or change the output-polarity. For example, the following shows the display used to check or change TTL3 (digital output #3):

SELECT OUTPUT LINE

TTL1 TTL2 TTL3 TTL4

Selecting TTL3 and pressing Enter changes the display to:

TTL3 LOGIC SENSE

ACTIVE-HIGH ACTIVE-LOW

ACTIVE-HIGH is the current setting for digital output #3.

• INPUT ON or OFF. Use this option to check or change the

status of the digital input line. Sense is ﬁxed at active-high (ON=5V).

• Add external 1kΩ pull-up resistors to the logic cir-

cuit inputs.

• Remove the built-in test resistors (R606, R608, R610, and R612),

• Use an external voltage supply.

External voltage supply

Each output can be operated from external voltage supplies (voltage range from +5V to +30V applied through the device being driven). Refer to Figure 4-9 for a simpliﬁed schematic of the digital I/O port. The high current sink capacity of the output driver allows direct control of relays, solenoids, and lamps (no additional circuitry needed). Each output channel contains a ﬂy-back diode for protection when switching inductive loads (such as a low power solenoid or relay coils). To use these ﬂy-back diodes, connect the external supply voltage to pin 3 of J1007 (the digital I/O port). Make sure the external supply voltage is between +5V and +30V and the current required by the device does not exceed 100mA.

4-44

Front Panel Operation

CAUTION

Do not apply more than 100mA maximum current or exceed +30V maximum voltage on pin 3 of J1007 (the digital I/O port). Applying current or voltage exceeding these limits may damage the instrument.

An externally powered relay connected to the digital output port is shown in Figure 4-10. Other externally powered devices can be similarly connected by replacing the relay with the device. When using the Model 7001’s collector outputs to turn on externally powered devices, set the correspinding digital output line parameters as follows (set through the MAIN MENU > DIGITAL-I/O > OUTPUT-STATUS and OUTPUT-POLARITY menus):

OUTPUT-STATUS=ON

TTLX LOGIC-SENSE=ACTIVE-LOW

NOTE

The X in TTLX represents the digital output line number (TTL1 through TTL4). This parameter is set through the OUTPUT-POLARITY menu by selecting the desired digital output line number and pressing Enter.

In the low state (0V), the output transistor sinks current through the external device. In the high state, the output transistor is off (transistor switch is open). This interrupts current ﬂow through the external device. Most applications use active-low (ON=0V) LOGIC-SENSE. Use the LOGIC-SENSE menu to check or change the sense of each digital output line (refer to OUTPUT -POLARITY in paragraph 4.6.3).

Outputs used as logic inputs

To use the digital outputs as logic inputs to active TTL, Low-power TTL, or CMOS inputs:

1. Connect the Model 7001 digital outputs to the logic inputs.

2. Connect the digital grounds.

3. Using the OUTPUT-STATUS menu, check the setting of the Model 7001 output lines. The OUTPUTST ATUS value for each output used should be ON.

4. Using the OUTPUT-POLARITY menu, check the logic-sense setting of the Model 7001 output lines (TTL1 through TTL4). Make sure the correct LOGICSENSE value is selected for each output line. The LOGIC-SENSE value varies according to the type of TTL, Low-power TTL, or CMOS inputs used (ACTIVE-HIGH or ACTIVE-LOW).

When low (0V), the output sink can drive at least 10 standard TTL inputs. When high (+5V), the 10kΩ pullup resistor will source >100µA while remaining at >3.75V output (a reliable logic high).

4-45

Front Panel Operation

To other three digital outputs

Digital Output #1 Flyback Diodes

Model 7001

10Ω

+5V

10kΩ Pull Up Resistor

Equivalent Circuit

Pin 3 - External Voltage Flyback connection (+5 to +30V)

External Power

Relay Coil

(+)

(+5V to +30V)

(-)

Pin 4 - Digital Output #1

Pin 8 - Digital Ground

DIGITAL

OUT

(Connector J1007)

Relay Coil

Flyback Diodes

Figure 4-10

Sample externally powered relay

4.9.2 Digital input channel

The Model 7001 has one digital input channel that is used to read a TTL input level. A TTL high on the input will be read as “ON”.

The front panel MENU feature reads the level of the digital input channel.

External Power

(+5V to +30V)

(+)

(-)

Transistor Switch

4.9.3 I/O port connections

The DIGITAL I/O port is located on the rear panel as shown in Figure 4-11. This drawing also provides the pin identiﬁcation for the 8-pin micro DIN female receptacle. Since the DIGITAL I/O receptacle is the same as the TRIGGER LINK receptacle, you can use a trigger link cable (Keithley Model 8501) to make connections.

By cutting a trigger link cable in two, it is possible to hard-wire the unterminated end directly to an external digital circuit.

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Front Panel Operation

By hard-wiring an external circuit to an 8-pin micro DIN female receptacle (see rear panel; Keithley Model

8501), you can use one complete Trigger Link cable for the digital I/O connections. Figure 4-12 provides pin identiﬁcation for the Trigger Link cable when it is used for the DIGITAL I/O port.

C A R D 1

DIGITAL I/O

CHANNEL

READY

R D

U T

TRIGGER LINK

LINE

RATING

IEEE-488

EXTERNAL

TRIGGER

CAUTION

T rigger Link and the Digital I/O port use the same type of connector. To prevent possible damage, do not connect the Digital I/O to the Trigger Link. Also, when connecting an external circuit to the Digital I/O, take care to not accidentally connect it to the Trigger Link.

Figure 4-11

Digital I/O port

Digital I/O Port

1 = Digital Input 2 = N/C 3 = External Voltage Flyback connection (up to 30V) 4 = Digital Output #1 5 = Digital Output #2 6 = Digital Output #3 7 = Digital Output #4

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Front Panel Operation

Figure 4-12

Digital I/O connections using trigger link cable

Trigger Link Cable

Cable Plug

1 = Digital Input 2 = N/C 3 = Voltage Input (up to 30V) 4 = Digital Output #1 5 = Digital Output #2 6 = Digital Output #3 7 = Digital Output #4 8 = Digital Common

4.10 External triggering

The Model 7001 has BNC connectors on the rear panel (see Figure 4-13) associated with external triggering. The EXTERNAL TRIGGER input jack allows the Model 7001 to be triggered by other instruments and the CHANNEL READY output jack allows the Model 7001 to trigger other instruments.

CHANNEL

READY

Figure 4-13

External triggering connectors (BNC)

4.10.1 External trigger

EXTERNAL

TRIGGER

Triggers on Leading Edge

TTL High (2V-5V)

TTL Low (≤0.8V)

2µs Minimum

Figure 4-14

External trigger and asynchronous Trigger Link Input pulse speciﬁcations

In general, external triggers can be used as events to control scan operation. In order for the Model 7001 to respond to external triggers, the appropriate layers of scan operation must be conﬁgured for it. Paragraph 4.8 explains how to program the three layers of the scan.

The EXTERNAL TRIGGER input jack requires a falling-edge, TTL-compatible pulse with the speciﬁcations shown in Figure 4-14.

4-48

Front Panel Operation

4.10.2 Channel ready

The CHANNEL READY output jack provides a TTLcompatible output pulse that can be used to trigger other instrumentation. The speciﬁcations for this trigger pulse are shown in Figure 4-15.

Channel

Ready

TTL High

(3.4V Typical)

TTL Low

(0.25V Typical)

10µs

Minimum

Figure 4-15

Channel ready and asynchronous Trigger Link Output pulse speciﬁcations

Typically, you would want the Model 7001 to output a trigger after each channel closes and settles (settling time includes the internally set relay settle time and the user programmed DELAY period; see paragraph 4.7). An output trigger will occur after each scanned channel as long as channel spacing is set to external. See paragraph 4.8.1 for details on programming the channel layer.

The Model 7001 can also output a trigger while in the scan and/or arm layers of operation. Figure 4-9 shows where these triggers occur in the trigger model. An output trigger will occur on each return path through the scan layer if the scan layer Source Bypass is enabled (Control = Source) and Scan Spacing is programmed for External. An output trigger will occur on each return path through the arm layer if the arm layer Source Bypass is enabled (Control = Source) and Arm Spacing is programmed for External. See paragraph 4.8.2 and

4.8.3 for programming the scan and arm layer.

4.10.3 External triggering example

In a typical test system, you may want to close a channel and then measure the DUT connected to that channel with a DMM such as the Keithley Model 196. Such a test system is shown in Figure 4-16 which uses a Model 7011 multiplexer card to switch 10 DUTs to the DMM.

The external trigger connections for this test system are shown in Figure 4-17. Channel Ready (output) of the Model 7001 is connected to External Trigger Input of the Model 196, and External Trigger (input) of the Model 7001 is connected to Voltmeter Complete Output of the Model 196.

For this test system, the Model 196 is conﬁgured for external triggering and the scan is conﬁgured as follows:

Scan List = 1!1-1!10,

Arm Layer:

Arm Spacing = Immediate* Arm Count = 1* Arm Trigger Control = Acceptor*

Scan Layer:

Scan Spacing = Immediate* Number of Scans = 1 Scan Trigger Control = Acceptor*

Channel Layer:

Channel Spacing = External Number of Channels = Use Scan list Length* Channel Trigger Control = Source*

* Indicates that the setting is the RESET (and factory) default

condition.

Notice that Channel Trigger Control is set for Source. With this selection, scan operation will initially bypass the need for an external trigger to close the ﬁrst channel. Since arm spacing and scan spacing are set for Immediate, the scan will start immediately as soon as the scanner is taken out of the idle state by pressing the STEP key.

When the front panel STEP key is pressed, the scanner will arm and close the ﬁrst channel. After Channel 1!1 settles (channel ready), a trigger is sent from Channel

4-49

Front Panel Operation

Ready of the Model 7001 to External Trigger Input of the Model 196 to trigger a measurement of DUT #1. After the Model 196 completes the measurement, it will output a trigger from Voltmeter Complete Output to External Trigger input of the Model 7001, which closes the next channel. After Channel 1!2 settles, a trigger is sent to the Model 196 to trigger a measurement of DUT

DUT

#2. When the measurement is completed, a trigger is sent to the Model 7001 to close the next channel. After this channel settles, a trigger is sent to the DMM to trigger a measurement. This process continues until all 10 channels are scanned and measured. The data store of the Model 196 could be used to store the measurements as they occur.

OUTPUT

HI LO

196 DMM

Figure 4-16

DUT test system

DUT

#10

Channel

Ready

7001 Switch System

7011 MUX Card

External

Trigger

7051-2

BNC to BNC

Cables (2)

Card 1

External

Trigger

Input

Voltmeter Complete

Output

196 DMM

Figure 4-17

External trigger connectors

4-50

Front Panel Operation

4.11 Trigger Link

The Model 7001 has enhanced external triggering capabilities using the Trigger Link. The Trigger Link has six lines allowing up to six instruments to be controlled over this trigger bus. The micro 8-pin DIN sockets used for the Trigger Link are shown in Figure 4-18.

O U

TRIGGER LINK

Figure 4-18

Trigger link connectors

events. Typically, a Trigger Link output trigger from the Model 7001 would be used to trigger another instrument to measure the currently selected channel.

There are two modes of operation for Trigger Link; asynchronous and semi-synchronous. In the asynchronous mode, separate lines are used for input and output triggers, and in semi-synchronous mode, the same line is used for both input and output triggers.

4.11.1 Asynchronous operation

In the asynchronous operating mode, Trigger Link functions fundamentally in the same manner as External Triggering (see paragraph 4.10). Like External Triggering, the asynchronous mode uses separate lines for input and output triggers. Also, the asynchronous mode uses the same TTL-compatible pulses as External Triggering. The input trigger speciﬁcations for asynchronous mode are shown in Figure 4-14 and the output trigger speciﬁcations are shown in Figure 4-15.

NOTE

The two rear panel Trigger Link connectors are actually connected in parallel to each other. Thus, the IN and OUT labels are a misnomer . It does not matter which connector you use when connecting the T rigger Link to another instrument.

CAUTION

In general, Trigger Link input triggers to the Model 7001 are used to control scan operation. In order for the Model 7001 to respond to Trigger Link compatible triggers, the appropriate layers of the scan must be programmed for it. For example, if you want Trigger Link input triggers to control the channel scan process, you must program Channel Spacing for TRIGLINK trigger

For typical Asynchronous Trigger Link operation, the channel layer of the scan is conﬁgured with Channel Spacing set to TRIGLINK and Triggerlink Mode set to Asynchronous. You must also select input and output lines for the channel layer. Input and output triggers can be set to any of the six lines, but they cannot use the same line. For example, if you select line #1 for input triggers, then output triggers must use one of the other ﬁve lines (#2 through #6). During operation in the channel layer , each Trigger Link input trigger will close a channel in the scan. After the relay settles, and the user programmed DELAY (see paragraph 4.7) times out, the Model 7001 will output a Trigger Link trigger (typically to a DMM to make a measurement). The channel layer is conﬁgured using the CONFIGURE SCAN menu (see paragraph 4.8.1).

The scan layer and/or arm layer can also be programmed for TRIGGER LINK; Scan Spacing is set to TRIGLINK, and ARM SPACING is set to TRIGLINK. When using T rigger Link in these layers, you must also select input and output lines as you did in the channel layer. Keep in mind that you can use the same lines in the scan and arm layers that you selected in the channel layer.

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Front Panel Operation

Asynchronous Trigger Link example #1

In a typical test system, you may want to close a channel and then measure the DUT connected to that channel with a meter . Such a test system is shown in Figure 4-19 which uses a Model 7011 multiplexer card to switch 10 DUTs to a meter that is equipped with Trigger Link.

DUT

#10

The Trigger Link connections for this test system are shown in Figure 4-20. Trigger Link of the Model 7001 is connected to T rigger Link of the meter . Notice that only one Trigger Link cable is needed.

OUTPUT

HI LO

DMM

Card 1

7011 MUX Card

Figure 4-19

DUT test system

OUT

Trigger

Link

7001 Switch System

Trigger

Link Cable

(8501)

Figure 4-20

Trigger Link connections (asynchronous example #1)

Meter

Trigger

Link

OUT

4-52

Keithley 7001 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Safety Precautions

7001 High Density Switch System Specifications

Table of Contents

List of Illustrations

List of Tables

General Information

1.1 Introduction

1.2 Features

1.3 Warranty Information

1.4 Manual addenda

1.5 Safety symbols and terms

1.7 Inspection

1.8 Optional accessories

Card Installation

2.1 Introduction

2.2 Model 701X series card installation

2.3 Non-701X series cards

Getting Started

3.1 Introduction

3.3 Operation demo

3.4 Overview of scan process

3.6 Front panel operation

3.7 IEEE-488.2 and SCPI basics

Front Panel Operation

4.1 Introduction

4.2 Power-up procedure

4.3 Display

4.4 Analog backplane

4.5 Mainframe programming

4.6 MENU

4.7 CARD CONFIG

4.8 SCAN CONFIG

4.9 Digital I/O port

4.10 External triggering

4.11 Trigger Link