Lecroy 7200 Operator

Table of Contents

General Information

Manuals .......................................................... i

Using This Manual ................................................. i

Warranty ......................................................... iii

Product Assistance ................................................. iv

Maintenance Agreements ............................................ iv

Service Procedure .................................................. iv

Table of Contents

Safety Precautions ..................................................

ESD Precaution ........................................... ’ ......... viii

Plug-in Module Installation and Removal ............................... x

Section 1: Product Description 1-1

Block Diagram .................................................... I-4

Section 2: Installation 2-1

Attach Line Cord ................................................... 2-1

Operate in Proper Environment ........................................ 2-1

Apply Power ...................................................... 2-2

Selecting the Computer Port .......................................... 2-2

Setting the GPIB Address ............................................ 2-2

GPIB Host and Hardcopy Operation ....................................

RS-232-C Configuration ............................................. 2-7

Install the Plug-in(s) ................................................

Section 3: Operation

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

vii

2-3

2-12

3-1

7200A Mainframe Front Panel ........................................ 3-10

Acquisition Keys .................................................. 3-11

TOC-1

Table of Contents

Waveform Display and Measurement ..................................

Panel Settings Storage ............................................... 3-51

Hardcopy ........................................................

Programming ......................................................

Using Setup Screens ................................................

Configure System ..................................................

Setting Up Traces and Processing Functions .............................

Extended Parameter Setup ............................................ 3-89

Persistence Setup Screen .............................................

Multi Zoom Setup Screen ............................................

Hardcopy Setup ....................................................

Waveform Storage Setup ............................................. 3-112

Waveform Recall Setup .............................................. 3-115

Disk Utilities ......................................................

Configure System ..................................................

Program Setup .....................................................

3-15

3-51
3-51
3-53
3-54
3-56

3-99
3-101
3-103

3-118
3-127

3-139

7242 Series Operator’s Manual

The 7242 Series ....................................................

Accessories and Options .............................................

Specifications .....................................................

Installation ........................................................

Install the Plug-in(s) ................................................ 4-3

Operation .........................................................

Probes ...........................................................

Control Layout .................................................

Display of Acquisition Settings ......................................

7242 Series Plug-in Front Panel Controls ................................ 4-8

TOC~

4-1

4-1
4-1

4-1
4-3

4-4
4-4
4-5
4-6

Table of Contents

Index to Controls ...................................................

Vertical Controls ...................................................

Timebase Controls .................................................. 4-12

Trigger Controls ...................................................

VERTICAL Status .................................................

TIMEBASE Status ................................................. 4-20

TRIGGER Status .................................................. 4-25

Standard Trigger ................................................... 4-27

Smart Trigger ...................................................... 4-27

Single Source ......................................................

Pattern .................................................. ......... 4-34

State Qualified .................................................... 4-39

Time Qualified .....................................................

TV ..............................................................

Plug-in Status .................................................... 4-51

4-9
4-10

4-14
4-17

4-30

4-45
4-50

7234 Plug-in Operator’s Manual 4-53

Installation ........................................................ 4-55

Install the Plug-in(s) ................................................

Operation ......................................................... 4-57

Probes ........................................................... 4-57

Control Layout ....................................................

Display of Acquisition Settings ...................................... 4-59

7234 Plug-in Front Panel Controls: ..................................... 4-61

Vertical Controls ................................................... 4-63

Timebase Controls .................................................. 4-66

Trigger Controls ................................................... 4-67

VERTICAL Status ................................................. 4-71

4-55

4-58

TOC-3

Table of Contents

TIMEBASE Status ................................................. 4-74

TRIGGER Status .................................................. 4-79

Standard Trigger ...................................................

Smart Trigger

TM

................................................... 4-81

Single Source ...................................................... 4-84

Pattern ........................................................... 4-88

State Qualified .................................................... 4-93

Time Qualified ..................................................... 4-99

Plug-in Status .................................................... 4-104

Appendix A

Summary of Waveform Processing, Display, and Storage ................... A-I

Appendix B

Raekmount Installation ............................................. B-1

Appendix C

Accessories ....................................................... C-1

Appendix D - 7291 2GS/sec Adaptor

Features .......................................................... D-1

4-81

A-I

B-I

C-I

D-1

Calibration ........................................................ D-2

Operation ......................................................... D-4

Appendix E - 7200ARCLK Installation, Test and Cal Procedure E-1

How to Use This Manual ............................................

Installation ........................................................ E-3

Calibration ........................................................

Test .............................................................

TOC4

E-1

E-5
E-6

Table of Contents

Appendix F - 7200A-IF2 Installation & System Test Manual

How To Use This Manual ............................................

Product Description .................................................

Specifications .....................................................

PC Utilities Operation and Description .................................

PC Utility Software Installation .......................................

Utility Program Definition ...........................................

7200A-IF2 Installation Procedure ......................................

F-1

F-1
F-1
F-3
F-3
F-4
F-7
F-10

Appendiz G - 7200A Version 2.2.0, Keyboard and SCSI Support G-1

Keyboard Support ..................................................

Additional Keyboard Support ................................ . ......... G-2

New Display Options ...............................................

SCSI Sequence ....................................................

Software Installation

7200A Install / Archive Utility ........................................

With the 7200A powered off: .........................................

Gol

G-3
G-3

Install-1

1
1

7200A Installation of New Software ...................................

MS-DOS Copy ....................................................

7200A Back Up / Restore Utility ...................................... 5

7200A Back Up/Restore Utility .......................................

Setup Screen Selections ..............................................

Restrictions .......................................................

Back Up and Restore Operation .......................................

Progress Display ...................................................

2

4

6
6

7
8
9

TOC-5

General Information

~,~. :.

Four manuals are included with the LeCroy 7200A Modular Oscilloscope System:

¯ LeCroy 7200 Series Modular Oscilloscope System Operator’s Manual explains

front-panel operation~ ~:

LeCroy 7200 Set)’ies Modular Oscilloscope System Programmer’s Manual

¯

e xp!a|ns programming protocol for controlling the 7200 Series from a host
computer, R~bte command descriptions for the 7200 Series and 7242/34 Series
plug,ins areialso included.

Getting SMrtedWith the LeCroy 7200 Modular Oscilloscope System and 7242/34

¯

Sede$ P, lug-in Modules helps a new user to quickly operate the instrument.

NEW -

LeCro.y¯7200 Series Technical Reference Manual, explaining the Pulse
P’arameters for the 7200 Series Oscilloscope.

Note

A/I Controls and Operation for the 7200 and 7200A Modular Oscilloscope

Mainframes are the same except for the following:

Time of Flight processing functions
Persistence setup Screen

1.44 MByte Floppy Format

Trace Annotation.Setup
Display Opi~0ns Setup

Display Options

Using, Manual

This operator’s manual cbntains installation and operating instructions for the 7200A

Modular Oscilloscope.,.. System:

Section 1: Product Description

Section 2: Im~latie.

... ,... ~.’ ’,.~

Overviews the 7200A’s major features. It also contains a
simple block diagram.

Describes the proper operating environment, setup pro-

cedures, and plug-in installation.

p. 3-74
p. 3-99
p. 3-122

p. 3-123
p. 3-125
p 3-128

Using This Manual

Section 3: Operation

Section 4:7200 Series

Plug-in Operation

Introduces concepts which are fundamental to operating
the 7200A. Then, =Using Front Panel Controls" details
manual operation. The remainder of the section explains

how to use setup screens to configure controls.
Explains the Operation and Control of all 7200 Series

Plug-in modules.

ii

Warranty

LeCroy warrants operation under normal use for a period of two years from the date of ship­ment. Replacement parts and repairs are warranted for 90 days. Accessory products not
manufactured by LeCroy are covered by the original equipment manufacturers’ warranties.

LeCroy provides software code error corrections at no charge.

USA

EAST

LeCmy Corporation
690 Chestnut Ridge Road

Chestnut Ridge, New York 10977-6449
TEL: [phone]

FAX: [phone]

FARWF.3T

LeCroy Corporation
5912 Stoneridge Mall Road, Suite 150

Pleasanton, California 94566

TEL: [phone]

FAX: [phone]

SOUTHWEST

LeCroy Corporation
14800 Central Avenue, S.E.

Albuquerque, New Mexico 87123

TEL: [phone]

FAX: [phone]

CANADA

LeCroy Canada Inc.
2751 Jacques Cartier est
Suite 200

Longueull, PQ, J4N IL7
TEL: [phone]

FAX: [phone]

EUROPE

WEST GERMANY

LeCroy GmbH
Postfach 10-37-67

Manhelmer Str. 177
D.6900 Heidelberg

West Germany
TEL: [phone]

FAX: [phone]

FRANCE

LeCroy SARL
B.P. 214

Avenue du Parana
F-91941 Les Ulis Cedex

France

TEL: [phone]

FAX: [phone]

SWITZERLAND

LeCroy SA
2, CheminPre-de-ia-Fontaine
P.O. Box 341

CH-1217 Meyrin 1 Geneva,
Switzerland

TEL: [phone]

LeCroy SA
Bahnhofstrasse 18

CH - 5600 Lenzburg
Switzerland

TEL: [phone]

FAX: [phone]

ENGLAND

LeCmy LTD
28 Blacklands Way

Abingdon Business Park
Abingdon, Oxon OX14 1DY

Great Britain

TEL: [phone]

FAX: [phone]

ITALY

LeCroy S.r.I.
Via Roccaporena 58

1-00191 Roma
Italy

TEL: [phone]

FAX: [phone]

LeCroy S.r.l.
Via Pinturricchio, 9

I - 20133 Milano
Italy

TEL: [phone]
FAX: [phone]

JAPAN

LeCroy OS
Esaka Sansho Bldg - 3rd Floor

16-3, 3-Chome

Tarumicho, Suite City
Osaka 564 Japan
TEL: [phone]

FAX: [phone]
LeCroy TK

Zaiken Bldg 6th Floor

Sasazuka, Shibuya-ku

Tokyo 151 Japan
TEL: [phone]

FAX: [phone]

BENELUX

LeCroy BV

Waalreseweg 17
NL-5554 HA Valkenswaard

The Netherlands
TEL: [phone]

FAX: [phone]

m

Service Procedure

In exercising this warranty, LeCroy will repair or, at its option, replace any product returned
to the factory or an authorized service facility within the warranty period only if the warran­tor’s examination discloses that the product is defective due to workmanship or materials
and the defect has not been caused by misuse, neglect, accident, or abnormal conditions or
operations.

The purchaser is responsible for transportation and insurance charges. LeCroy will retum all
in-warranty products with transportation prepaid.

This warranty is in lieu of all other warranties, express or implied, including but not limited to
any implied warranty of merchantability, fitness, or adequacy for any particular purpose or
use. LeCroy Corporation shall not be liable for any special, incidental, or consequential dam­ages, whether in contract, or otherwise.

Product Assistance

LeCroy Corporation will gladly answer your questions. Write or call your regional field serv-

ice office (see next page) or Test & Measurement Division, 700 Chestnut Ridge Road, Chest­nut Ridge, New York 10977-6499. TEL: [phone], ext. 6011.

Maintenance Agreements

LeCroy offers a choice of customer support services to meet your individual needs. Annual
software maintenance contracts, ensures your 7200A always features the latest processing

enhancements and extensions. Extended warranty maintenance agreements let you budget

maintenance costs after the initial warranty has expired. Other services such as installation,

training, calibration, enhancements and on-site repair are available through specific Supple-

mental Support Agreements. Contact your regional field service office for details:

Service Procedure

Refer any servicing requiring removal of exterior enclosure panels to qualified LeCroy serv­ice personnel. Be prepared to describe the problem in detail.

WARNING: Do not remove chassis panels. Removing the

ax~rlor covers exposes parts which could cause electric [

Jl

ahock.

If the product is under warranty, LeCroy will, at its option, repair or replace the 7200A at no

charge. For repairs after the warranty period, the customer must provide a Purchase Order

iv

Service Procedure

Number before the service engineer can initiate repairs. The customer will be billed for the
parts, labor, and shipping.

Shipping Guidelines

First, attach a tag to the instrument which indicates:

Purchase Order Number

Owner’s name and complete address
The service required including detailed operational problems

Person to contact for confirmation (include phone number)

Ship the unit in its original packaging. If not possible, provide a 275 lb. strength double wall
corrugated cardboard box with inside dimensions at least eight inches greater than the
instrument dimensions. The extra space will provide adequate room for cushioning.

Protect the finish by carefully wrapping the unit in polyethylene sheeting.
Place adequate dunnage or urethane foam in the container (approximately 4 inch depth) and

place the wrapped unit on it. Allow approximately four inches of space on all four sides and
the top of the unit.

Fasten the container with packaging tape and/or industrial staples. Address the container to
LeCroy’s service location and include your return address.

Safety Precautions

This manual describes how to maintain the LeCroy 7200 Series Precision Digital Oscilloscope. For ease of refer­ence, this equipment is referred to as the 7200 Mainframe throughout this manual.

The general Safety precautions listed below must be followed during all phases of operation and service of the Le­Croy 7200 Series Precision Digital OscoUoscope. These wamings and other specific safety notices may be repeated

elsewhere in this manual. LeCroy Corporation assumes no liability for the operator who fails to comply with these
precautions.

AC POWER SOURCE

This product Is designed to operate from an AC
power soume that will supply not more than 250

volts rms, between the two supply conductors (line
and neutral), or between either supply conductor

and ground.

PROPER GROUNDING

The 7200A Is a Safety Class 1 instrument. This

means that the instrument enclosure is connected

to protective earth ground through the three-conduc­tor power supply cord, and properly grounded AC

power outlet. This protective grounding minimizes
shock hazard and is essential for safe opera-

tion. Any interruption of the protective earth connec­tion will cause a potential shock hazard, as all
accessible conductive parts, (even knobs and con-

trois which may appear to be non-conductive) may
render an electric shuck.

FUSES

To avoid fire hazard, use only fuses of the same
type, current rating, and voltage rating, as speclfl-

caUy called out in this manual.

DO NOT OPERATE IN AN EXPLOSIVE

ATMOSPHERE

Do not operate the 7200A In an atrnosphere of ex­plosive gases of flammable gases.

DO NOT REMOVE COVERS OR

PANELS

To avoid personal Injury, the operator should not re.

move the protective covers, or attempt internal serv­icing or adjustment of any kind. Refer this servicing

to qualified LeCroy service personnel. Do not oper-

ate this instrument with any protective panels or cov-

ers removed.

DEFINITION OF TERMS

In Manuals: CAUTION statement, signifies condi-

tions or practices which may result in damage to
EQUIPMENT or PROPERTY. This differs from the

WARNING statement, which signifies a condition or
pratlce which could result in PERSONAL INJURY or
LOSS OF LIFE.

When these terms are encountered in the text, the
reader should not proceed further until the specific

notice is fully understood.

On Equipment: CAUTION statement, indicates a
personal injury hazard which is not immediately ac-

cessible to the person reading the marking, it may
also signify a hazard to the equipment or property.

DANGER statement, signifies a personal
injury hazard which is immediately acces-

sible to the person reading the marking.

SAFETY SYMBOLS

As marked on equipment:

DANGER - Hazardous voltages

Protective ground (earth) terminal

®

//~ A’I-I’ENTION - refer to the manual

vii

Section 1: Product Description

The LeCroy 7200A Precision Digital Oscilloscope offers high accuracy waveform measure­ment and analysis with full IEEE-488 (GPIB) and RS-232-C support. Using different plug-ins,
you can customize waveform acquisition parameters to match a specific application. These
parameters include sample rate, resolution, bandwidth, triggering, waveform memory, and
number of channels.

Key Features of the 7200A Precision Digital Oscilloscope

Modular Digitizing Plug-in

1 or 2 plug-ins per 7200A mainframe, with independent or slaved timebase and

¯

trigger.

Display

¯ High resolution color display.
¯ Up to 8 traces, simultaneously displayed.

¯ Vertical and horizontal expand and position for all traces.
¯ Hardcopy to plotters, dot matrix printers, laser printers and floppy disk

(compatible with desktop publishing systems).

Manual, Remote, and Automatic Control

Familiar analog controls for timebase, sensitivity, offset, etc.

¯
¯ On-line HELP for all controls.

¯ Autosetup to set the trigger, gain, offset, and timebase to display a repetitive input

signal.

¯ Full remote control from IEEE-488 (conforming to IEEE-488.2) and RS-232-C.

¯ Program mode for automated measurement sequences and test applications.

Waveform Measurements

¯ 14 basic waveform parameters on any trace.
¯ Up to 20 waveform parameters (choose from more than 70) on any combination

of 8 traces.

Any parameter on any trace available from remote control or Program mode.

¯
¯ Simple vertical and horizontal measurements using cursors.

1-1

ESD Precaution

The 7200 Mainframe contains electrostatic discharge (ESD) sensitive devices. For this rea­son, it is necessary to work on the 7200 Mainframe in an environment that minimizes expo­sure of the circuit board assemblies and components to conditions that could be
destructive. Servicing of the 7200 Mainframe and its ancillary devices requires an awareness

of the potentially destructive effects of ESD. Depending upon the relative humidity of the
maintenance shop, seemingly simple and unrealted acts such as walking across vinyl floor

or picking up an ordinary polyethylene bag from a workbench can generate thousands of
volts of electricity. If proper grounding practices are not used, accidental contact with one of

the CMOS devices on a circuit can result in its destruction.
The maintenance shop must be free of sources of static electricity. This means that neither

the 7200 mainframe nor any of its acillary devices should be disassembled on a work sur­face of melamine or finished wood unless a properly grounded electrostatic mat is under­neath.

A work chair padded with urethane foan can generate 18 thousand volts of static electricity If
humidity is low. Chairs of finished wood, vinyl, and fiberglass should not be used and metal

work chairs may be used only if properly grounded.
Personell should not wear common clean room smocks, non-conductive shoes, or garments

made of any material other than virgin cotton.
Common plastic bags, wraps, envelopes, bubble pack, foam, trays, tote boxes, vials, and

parts bins should not be in the shop. All board assemblies should be placed in ESD-protec­tive bags Immediatley upon removal and all new boards should not be removed from their

ESD-protective bags until immedlaltely before installation.
In addition, common spray cleaners, solder suckers, and soldering irons should not be

used. Brushes with synthetic bristles should not be used for solvent cleening, e.g., removal

of rosin residue from circuit board assemblies.

Heat guns and blowers are potential sources of static electricity and all cleaning and drying

operations are potential sources as well.

Increased ESD awareness has four major effects:

¯ All electronic components are assumed to be ESD-sensitive

¯ Sensitive components are not touched unless a properly grounded wrist strap is

worn

¯ Sensitive components are transported, stored, and handled only in ESD-frae

environments

¯ ESD-sensltive components are tested only in a static-free environment

viii

As a general approach to servicing the 7200 Mainframe and its ancillary devices, do the fol­lowing:

Disconnect power from the 7200 Mainframe except when required for voltage checks and

.

adjustments.
Be sure the multimeter is properly grounded before checking power supply output levels.

.

3.

Wear a properly grounded wrisy strap or touch the properly grounded 7200 Mainframe
before removing any board, the hard disk drive, or the floppy drive.

°

Wear a properly grounded wrist strap to remove any board from a plug-in

5.

Ground the ESD-protective package containing replacement devices before opening to
dissipate its static charge.

°

Remove ESD-sensitive devices from their packaging immediately before installation. Avoid
touching other parts, connections, and circuitry.

Use only anti-static spray for troubleshooting.

.

ix

Plug-in Module Installation and Removal

Installation

CAUTION: Plug-in modules should not be installed with 7200 Mainframe power on.

To install a plug-in module, use the following procedure:
a.)

b.)

Align groove on bottom of plug-in module (Figure 1) with guide on bottom of plug-in
compartment of 7200 mainframe.

Slide plug-in module into compartment until latched in place.

Removal

CAUTION: Plug-in modules should not be removes with 7200 Mainframe power on.

To remove a plug-in module, use the following procedure:
a.) At bottom front of plug-in module, pull latch to release, then slide out of compartment

Figure 1

Waveform Processing

¯ Extensive processing possible for each of 8 traces including addition, subtraction,

multiplication, division, differentiation, integration, smoothing, averaging, FFT,
square, square-root, log, histograming, trending, etc.

¯ Engineering units used for all processing.

Data Storage and Portability

¯ MS-DOSe compatible 3.5" floppy for waveform storage and portability.
¯ 8 non-volatile memories available for individual waveform storage.

¯ Store and recall front-panel setups to intemal or floppy disk.
¯ Optional external hard drive available for increased security

Software Support

¯ Updates via floppy disk.

Future plug-in drivers supplied on floppy disk without firmware Updates.

¯

The LeCroy 7200A Precision Digital Oscilloscope provides high accuracy waveform meas­urement, analysis, and built-in mass storage with full IEEE-488 (GPIB) and RS-232-C sup-

port. Its modular amhitecture accepts plug-ins with integral digitizers and recording
memories.

Different plug-ins allow you to customize acquisition parameters, such as sample rate, band­width, and number of channels, to match specific applications. Because each plug-in con­tains its own digitizing circuitry, you can add channels without losing performance. The

system is truly Integrated, permitting cable-free synchronization of timebases and triggers
between plug-ins.

The 7200A can perform extensive waveform processing and measurements, either manu­ally, automatically, or under remote control. Waveform processing includes addition, subtrac-

tion, multiplication, division, differentiation, integration, smoothing, averaging, FFT, square,

square-root, log,histogram, trend, etc.
Using custom digital signal processing circuitry, the 7200A rapidly analyzes large waveforms

to produce accurate waveform parameters based on the IEEE standard for pulse charac­terization. A comprehensive set of automatic waveform parameters is provided. Custom pa-

ramaters can be added (contact LeCroy).

A built-in hard disk and 3.5" MS-DOSe floppy disk drive provide mass storage and data port­ability. Waveforms, front-panel setups, and user Programs can be stored on either disk. In

Record Traces mode, thousands of waveforms can be stored at high speed to the hard disk

for later recall, analysis, or processing. The hard disk also contains the operating system and

1-2

the comprehensive on-line HELP manual. The MS-DOS® floppy disk provides convenient
data portability and long-term storage. Software upgrades and new plug-in drivers are han-

dled economically by using floppies rather than by changing firmware.
The 7200A _supports a wide variety of hardcopy devices, using GPIB, RS-232-C, and parallel

(Centronics
ing graphic output with a desktop publishing system.

Another powerful feature of the 7200A is its ability to execute user programs, making it ide­ally suited for automated test applications. Programs are closely tied to the 7200A’s remote

control syntax with simple control-flow structures. The "Learn" mode records a sequence of
front-panel keystrokes as a program, providing the basis for automating measurements. Off-

line editing on a PC can produce more powerful programs involving looping and decision
making for sophisticated automatic tests.

The 7200A’s extensive waveform processing and measurement capabilities, coupled with de­cision making, make it a complete stand-alone automatic test system for producing answers,

not just data.

~)

communication standards. It also supports HPGL output to floppy for integrat-

1-3

Block Diagram

The Cenb’al Processor co-ordinates the activities of the other units. Commands are received
from the front-panel subsystem, which constantly monitors all the front-panel keys and

knobs, or from a host computer. Alternately, the CenVal Processor can execute a previously
saved sequence of commands, interpreting and directing them to the appropriate subsystem

to perform tasks. All control settings are saved in non-volatile memory. The front panel con-

trol setup can also be saved on the Internal disk or the floppy diskette.
The C, enVal Processor also oversees data acquisition. The Master Timebasa Reference syn-

chronizes data acquisition between plug-ins. When acquisition completes, the Central Proc­essor receives the data and performs any requested waveform processing and automatic
measurements. Some processing can also be done in the plug-in itself. The results can be
sent to the display, floppy diskette, and the I/O port. If Record Traces is enabled, the data
can also be stored on the internal disk for later review.

digital bus

1-4

I

analog bus

i ::::~: MASTSR .......... iiii

TIMEBA8E : i

i REFERENCE i

L.......~.: ...........,.;. .......................; ...........

..[+++~~+®+++

~1+ "+++ +~:+

Figure 1.1: 7200A Block Diagram

~~

I IEEE-488 I Plotters,
[ RS.232-C ] Printers and

[ Centronlcs [ Remote Control

External Reference IN/OUT

Analog Inputs

External Sample Clock

Analog Inputs

Floppy Disk
Hard Disk

External Sample Clock

Trigger IN/OUT

Section 2: Installation

The 7200A runs over the full line voltage range of 90 Volt to 250 Volt AC rms and source fre­quencies of 47 to 63 Hertz.

The 7200A is shipped with the fuse drawer and fuses most common to its destination al­ready installed in the line cord connector (rear panel).

Attach Line Cord

The AC input receptacle (CEE-22 style) located in the line cord connector (rear panel)
three recessed male pins which accept the detachable line cord. To obtain an AC line cord
other than the one supplied, please contact the factory.

Operate in Proper Environment

WARNING: To avoid explosion, do not operate the 7200A in an

atmosphere of explosive gases.

To ensure proper operation and long instrument life, the 7200A should be operated within
the following environmental conditions:

Temperature

Ambient air temperatures between 0° to +40° C. Storage temperatures can range between

-40 to +75 C.

Ventilation

The Model 7200A is cooled by air drawn from the bottom front and exhausted through the

rear. Operate the instrument on a hard flat surface, or carpeting of very low pile. Allow at
least one half inch clearance under the bottom and 2" behind the rear fans and along the

side panels.

Grounding

Ensure a good ground. The Model 7200A is a Safety Class 1 instrument. Its exposed metal

chassis is directly connected to earth via the power supply cord.

2-1

Setting the GPIB Address

WARNING: To avoid possible shock hazard, ground the 7200A

chassis by connecting the power supply cord to an earth grounded

AC power receptacle. Do not make any connections to the

instrument’s input or output terminals until the 7200A is properly

grounded.

Apply Power

CAUTION: Use correct power source. The Model 7200A is
designed to operate from a single-phase power source. The voltage
to ground (earth) from either pole of the power source must not
exceed the maximum rated operating voltage, 250 Volts AC rms.

To supply power to the 7200A, set its rear panel ON/OFF switch to the ON (I) position.

Selecting the Computer Port

CAUTION: Before connecting external equipment to the 7200A, set
its front panel power switch to the OFF (0) position.

The 7200A provides three interfaces: the General Purpose Interface Bus (GPIB), an RS-232-

C Sedal Port, and a Centronics Port. The GPIB end RS-232-C ports can be used to connect

the 7200A to a host computer or to connect to a printer or plotter for hardcopy output. The

Centronics port is used for hardcopy output only. The advantage of GPIB is high transmis­sion rates. The advantage of RS-232-C is that it is a lower cost interface which can generally

be used over longer distances. If the 7200A will be used in conjunction with a host computer,
set the =Remote Control from" field in the Communications screen to either GPIB or RS232.

CAUTION: If the same port is selected for both Remote Control

and Hardcopy, when the hardcopy key is pressed, no plot is
produced and only the User Request (URQ) bit in the Standard

Event Status register (’ESR) is saL This is so the Remote
Controller can synchronously initiate the hardcopy remotely once all

the connected devices are properly set up. If a Remote Controller
is not used, then the "Remote Control from" field in the

Communications Setup screen must be set to a port that is different
from the Hardcopy Port in order to enable the hardcopy key.

Setting the GPIR Address

The GPIB address is set in the Communications Setup screen. From the Main Screen, press
the Configure System softkey to display the Configure System setup screen. Then press the

Communication Setup softkey to display the Communications Setup screen. Move the box

2-2

GPIB Host and Hardcopy Operation

onto the =Remote Contol from" field and select GPIB. Then move the box onto the =GPIB Ad-

dress" field and select an address from 0 to 30. Note that these controls are preserved in bat­tery backed up memory and are NOT reset by pressing the Default Settings softkey.

GPIB Host and Hardcopy Operation

The 7200A can communicate across GPIB as a talker or a listener with a remote host con­troller to receive remote commands/queries and send responses. Alternately, it can operate
over GPIB with a controller as a Talk Only device. The use of each of these modes is de­scribed below.

Remote Control Operation over GPIB

The 7200A enters Talk/Listen mode when the =Remote Control from" field in the Communica­tions Setup screen is set to GPIB. In this mode, the 7200A can both receive commands and
setups from the remote host computer and send data and measurement results.

Plotting/Printing over GPIB with a Controller

If the HARDCOPY command is sent to the 7200A when in this mode, the 7200A will wait to

be addressed to talk before sending the hardcopy data. The host computer then has three
options in generating the hardcopy:

1) The host computer may read the data into internal memory

and then send the data to a printer/plotter. This is exactly the
same as reading a query response.

2) The host computer may send the =HARDCOPY" remote com­mand and then address the printer/plotter to listen and the
7200A to talk and read the data from the 7200A. As the data is
read into the computer’s internal memory, it is also printed/plot-

ted to the printer/plotter which is a Listener.

3) The host computer may send the =HARDCOPY" remote com­mand and then address the printer/plotter to listen, the 7200A to

talk, and the controller to go into stand-by mode waiting for EOI.
Altematively, the Data Processing Status Register (DPR) could
be programmed to issue an SRQ when hardcopy is complete so
that the host computer can perform other tasks while the hard-

copy is performed.
If the local HARDCOPY key is pressed when both the Remote

Control port and the Hardcopy port are set to GPIB, then a hard­copy is not generated. This is so the hardcopy data does not dis-

2-3

GPIB Host and Hardcopy Operation

rupt controller activity on the GPIB bus. Instead, pressing the
HARDCOPY key sets the User Request (URQ) bit in the Stand-

ard Event Status register (*ESR). The Remote Controller can
monitor this bit and when it is set, it can initiate the hardcopy re­motely In one of the three ways discussed previously.

Printing/Plotting over GPIB without a Controller

To output hardcopy data over GPIB, the "Hardcopy Port" field in the Hardcopy screen must

be set to GPIB and the Remote Control port must be RS-232-C. Talk Only is a special GPIB

mode where there is no controller allowed on the bus; the 7200A is the only talker and all

connected devices must be listeners (ie., printers/plotters must be in Listen Only mode).

Note: Since some printers/plotters do not properly enter Listen Only mode,
the 7200A will address the device at address 30 to listen before sending the

hardcopy data. ff your GPIB printer/p/offer does not work with the 7200A, set
Its GPIB address to 30 and the 7200A will force/t to listen.

2.4

GPIB Interconnection

The devices on the GPIB network can be connected in any combination of star or linear ar­rangements. Standard IEEE 488.2 cables must be used to connect all the devices and total

length must not exceed 20 meters. Attach the 7200A’s rear panel connector to the network
using the cable provided with the 7200A.

The devices must conform to these rules:

¯ At least half of the devices on the network must be turned on.
¯ One network can connect no more than 15 devices (including the controller).

¯ One device must be connected for every two meters of cable, assuming one

device represents one standard device load. The 7200A’s GPIB connector is
located on its rear panel.

¯ Each device must have a unique bus address.

DEVlCE D

DEVICE 8

STAR CONFIGURATION

LINEAR CONFIGURATION

Figure 2.1: Examples of GPIB Network Arrangements

2-5

GPIB Host and Hardcopy Operation

Connect the Printer / Plotter

When operating in Talker Only mode, set the GPIB printer/plotter to Listen Only, and the
7200A to Talk only.

GPIB

7200A

Figure 22.: Talk Only mode GPIB output

When operating in Talk/Listen mode, a GPIB controller is required. The conVoller directs the
7200A to output data to the printer or plotter.

Controller

Figure 2.3: Talk/Listen mode GPIB output

Plotter

2-6

RS-232-C Configuration

Setup the Serial Port

The 7200A contains a 9-pin, male RS-232-C connector for serial communication with a
printer, terminal, or computer. To connect an RS-232-C line to the 7200A, use a female DB9­D connector. If the computer has a DB25-D connector, use a DB9-D to DB25-D cable adapt­er. It is recommended that you use CTS and RTS handshaking which guarantees that data
passed between a remote computer and the 7200A will not overrun the 7200A or the com­puter’s RS-232-C buffer.

Select the desired settings for the interface using the Communications Setup screen:

1. From the Main Screen, press the Configure System softkey to display the Configure
System setup screen.

2. Then press the Communication Setup softkey to display the Communications Setup
screen. (See Communications Setup, p. 3-131, for details.)

RS-232-C Host Interconnection

Although the RS-232-C standard defines signal lines and electrical characteristics, it does

not define mechanical characteristics. The 7200A RS-232-C output port is configured as an
RS-232-C =Data Terminal Equipment" so that data is sent from pin 2 and received on pin 3.

For remote operation, the RS-232-C port must be connected to a computer terminal.

The following diagrams are used for various host drivers.

"Data Terminal Equipment"

Figure 2.4: RS-232-C Connection to an IBM-PC Host

2-7

DB9 to DB25 Wiring

This wiring configuration is used for IBM-PCs and compatibles with DB25-D connectors
configured as Data Terminal Equipment. Note that for XON-XOFF communication protocol,

only pins 2, 3, and 5 on the DB9-D connector are needed. Also, commercially available DB9-

to-DB25 adapter cables for the IBM-PC swap pins 2 and 3 and pins 7 and 8.

DB9 to DB9 Wiring

For IBM PC-AT types with DBg-D connectors configured as Data Terminal Equipment.

2-8

DTE to DCE Wiring

For non-IBM types with DB9-D connectors configured as Data Communications Equipment.

RS-232-C Configuration

RS-232-C Interconnections for Hardcopy

When connecting an RS-232-C serial printer/plotter to the 7200A, the printer/plotter configu­ration must match the 7200A RS-232-C port settings. To modify the 7200A’s settings, use
the Communications Setup screen (see page 3-131 ).

RS-232-C Connection

"Data Terminal Equipment"

"Data Terminal Equprnent"

(7200A)

DB9 to DB25 Wiring

NOTE: The 7200A RS-232-C interface is a DB9-D connector. Use
an adapter cable to connect to an RS-232-C DB25-D connector.

Figure 2.5:

RS-232-C Connection to an RS-232-C

Serial Plotter

2-10

RS-232-C Configuration

Parallel-Centronics Wiring

The 7200A uses a standard DB25-D female connector as the Centronics parallel output port.

An adaptor cable is required to adapt the 7200A DB25-D connector to the standard 36-pin
bail lock connector used on most Centronics printers.

7200A

Figure 2.6: Output to Centronics type Printer/Plotter

Printer

2-11

Install the Plug-in(s)

The plug-in manual contains instructions for operating the front panel controls. Plug-in func­tions controlled by the 7200A mainframe front panel are detailed in Section 3 of this manual.

CAUTION: Do not Install or remove a plug-In while the 7200A

mainframe is powered on.

To install, align the plug-in’s bottom grooves with the guides at the bottom of the main­frame’s plug-in compartment. Next, slide in the plug-in until it latches into place. Move the
latch on the 7200 Series plug-in until it is flush with the plug-in body. Remove the plug-in by

pulling out its latch and sliding it out.

2-12

/LATCH

Rgure 2.7: Plug-in Installation