HP 54501A Manuel du propriétaire

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Programming Reference

HP 54501A Digitizing Oscilloscope

Printing History

New editions are complete revisions of the manual. Update packages,

which are issued between editions, contain additional and replacement

pages to be merged into the manual bythe customer. The dates on the

title page change only when a new edition is published.

A software code may be printed before the date; this indicates the version

of the software product at the time the manual or update was issued.

Many product updates and fixes do not require manual changes and,

conversely, manual corrections may be done without accompanying

product changes. Therefore, do not expect a one to one correspondence

between product updates and manual updates.

Edition 1 June 1989 54501-90907

List of Effective Pages

The List of Effective Pages gives the date of the current edition and of any

pages changed in updates to that edition. Within the manual, any page

changed since the last edition is indicated by printing the date the changes

were made on the bottom of the page. Ifan update is incorporated when

a new edition of the manual is printed, the change dates are removed from

the bottom of the pages and the new edition date is listed in the Printing

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Pages Effective Date

Product

Warranty This Hewlett-Packard product has a warranty against defects in

material and workmanship for a period of three years from date of

shipment. During warranty period, Hewlett-Packard Company will, at

its option, either repair or replace products that prove to be defective.

For warranty service or repair, this product must be returned to a

service facility designated byHewlett-Packard. However, warranty

service for products installed by Hewlett-Packard and certain other

products designated by Hewlett-Packard will be performed at the

Buyer's facility at no charge within the Hewlett-Packard service travel

area. Outside Hewlett-Packard service travel areas, warranty service

will be performed at the Buyer's faculty only upon Hewlett-Packard's

prior agreement and the Buyer shall pay Hewlett-Packard's round trip

travel expenses.

For products returned to Hewlett-Packard for warranty service, the

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and taxes for products returned to Hewlett-Packard from another

country.

Hewlett-Packard warrants that its software and firmware designated by

Hewlett-Packard for use with an instrument will execute its

programming instructions when properly installed on that instrument.

Hewlett-Packard does not warrant that the operation of the instrument

software, or firmware will be uninterrupted or error-free.

Limitation of

Warranty The foregoing warranty shall not apply to defects resulting from

improper or inadequate maintenance bythe Buyer, Buyer-supplied

software or interfacing, unauthorized modification or misuse, operation

outside ofthe environmental specifications for the product, or

improper site preparation or maintenance.

NO OTHER WARRANTY IS EXPRESSED OR IMPUED.

HEWLETT-PACKARD SPECIFICALLY DISCLAIMS THE

IMPUED WARRANTIES OF MERCHANTABILITY AND

FITNESS FOR A PARTICULAR PURPOSE.

Exclusive THE REMEDIES PROVIDED HEREIN ARE BUYER'S SOLE

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INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER

BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL

THEORY.

Assistance Product maintenance agreements and other customer assistance

agreements are available for Hewlett-Packard products.

For assistance, contact your nearest Hewlett-Packard Sales and Service

Office.

Certification Hewlett-Packard Company certifies that this product met its published

specifications at the time of shipment from the factory.

Hewlett-Packard further certifies that its calibration measurements are

traceable to the United States National Bureau of Standards, to the

extent allowed by the Bureau's calibration facility, and to the

calibration facilities of other International Standards Organization

members.

Safety This product has been designed and tested according to International

Safety Requirements. To ensure safe operation and to keep the

product safe, the information, cautions, and warnings in this manual

must be heeded.

Introduction

This manual explains how to program the HP 54501A Digitizing

Oscilloscope and lists the commands and queries associated with this

instrument. It is divided into 17 chapters and 2 appendices.

Chapter 1 introduces you to the programming syntax required to

program this instrument and provides some basic programming

concepts to get you started programming..

Chapter 2 describes the interface functions and some general

concepts of HP-IB.

Chapter 3 describes the operation of instruments that operate in

compliance with the IEEE 4882 standard. This chapter also

describes the status reporting features that are available over the

HP-IB.

Chapter 4 covers the conventions which are used to program the

instrument as well as conventions used in the remainder of this

manual. This chapter also includes a complete command tree and

alphabetic command cross-reference.

Chapter 5 lists the Common Commands which are the commands

defined by IEEE 488.2. These commands control some functions

that are common to all IEEE 488.2 instruments.

Chapter 6 lists the Root Level Commands which control many of

the basic functions of the instrument.

Chapter 7 lists the System Subsystem Commands which control

some basic functions of the oscilloscope.

Chapter 8 lists the Acquire Subsystem Commands which set the

parameters for acquiring and storing data.

Chapter 9 lists the Calibrate Subsystem Commands which set time

nulls (channel-to-channel skew).

HP 54501A

Programming Introduction-1

Chapter 10 lists the Channel Subsystem Commands which control

all Y-axis oscilloscope functions.

Chapter 11 lists the Display Subsystem Commands which control

how waveforms, voltage and time markers, graticule, and text are

displayed and written on the screen.

Chapter 12 lists the Function Subsystem Commands which control

the waveform math functions of the oscilloscope.

Chapter 13 lists the Hardcopy Subsystem Commands which

control the parameters used during the printing of waveforms.

Chapter 14 lists the Measure Subsystem Commands which select

the automatic measurements to be made.

Chapter 15 lists the Timebase Subsystem Commands which

control all X-axis oscilloscope functions.

Chapter 16 lists the Trigger Subsystem Commands which control

the trigger modes and parameters for each trigger mode.

Chapter 17 lists the Waveform Subsystem Commands which

provide access to waveform data, including active data from

channels and functions as well as static data from waveform

memories.

Appendix A provides details on how automatic measurements are

calculated and offers some tips on how to improve results.

Appendix B contains example programs using the command set

from the HP 54501A.

At the end of the manual is Quick Reference Guide that lists the

commands and queries with their corresponding arguments and

returned formats. Also, at the end of the manual is a complete index

for easy reference of commands and functions.

Introduction-2

HP 54501A

Programming

Contents

Introduction

Chapter 1: Introduction to Programming an Oscilloscope

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

Programming Syntax .........................................1-2

Talking to the Instrument ..................................1-2

Addressing the Instrument .................................1-3

Program Message Syntax ...................................1-4

Separator ................................................1-5

Command Syntax .........................................1-5

Query Command .........................................1-7

Program Header Options ..................................1-8

Program Data ............................................1-8

Program Message Terminator ..............................1-9

Selecting Multiple Subsystems .............................1-10

Summary ...............................................1-10

Programming an Oscilloscope ................................1-11

Initialization.............................................1-11

Autoscale ...............................................1-12

Setting Up the Instrument .................................1-12

Receiving Information from the Instrument ..................1-13

Response Header Options ................................1-14

Response Data Formats ..................................1-15

String Variables .........................................1-16

Numeric Variables .......................................1-17

Definite-Length Block Response Data ......................1-18

Multiple Queries.........................................1-19

Instrument Status ........................................1-19

Digitize Command .......................................1-20

HP 54501A

Programming Contents-1

Chapter 2:

Chapter 3:

Interface Functions

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

Interface Capabilities ........................................2-1

Command and Data Concepts .................................2-1

Addressing .................................................2-1

Remote, Local and Local Lockout .............................2-2

Bus Commands .............................................2-3

Device Clear .............................................2-3

Group Execute Trigger (GET) ..............................2-3

Interface Clear (IFC) ......................................2-3

Status Annunciators .........................................2-3

I——————————————————————————————————————

Message Communication and System Functions

Protocols ...................................................3-1

Functional Elements ......................................

3-1

Protocol Overview ........................................

3-2

Protocol Operation........................................3-2

Protocol Exceptions .......................................3-3

Syntax Diagrams ............................................3-5

Syntax Overview.............................................3-5

Device Listening Syntax ....................................3-8

Device Talking Syntax ....................................3-21

Common Commands........................................3-27

Status Reporting ...........................................3-28

Bit Definitions ...........................................3-30

Key Features ............................................3-31

Serial Poll...............................................3-32

Parallel Poll .............................................3-34

Polling HP-IB Devices. ...................................3-36

Configuring Parallel Poll Responses ........................

3-36

Conducting a Parallel Poll.................................3-37

Disabling Parallel Poll Responses ..........................3-37

HP-IB Commands .......................................3-37

Contents-2 HP 54501A

Programming

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