National Instruments GPIB-120A Glossary

Glossary

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Prefix Meaning Value

n- nano- 10-9

µ- micro- 10-6

m- milli- 10-3

k- kilo- 103

M- mega- 106

°degrees

% percent

A amperes

AC alternating current

ANSI American National Standards Institute

ASCII American Standard Code for Information Interchange

ATN Attention

C Celsius

CIC Controller-In-Charge

CPU central processing unit

DAV Data Valid

DC direct current

DIO Data Input/Output

EMI electromagnetic interference

EOI End Or Identify

FCC Federal Communications Commission

GPIB General Purpose Interface Bus

Hz hertz

IFC Interface Clear

in. inches

ISO International Standards Organization

LED light-emitting diode

m meters

MB megabytes of memory

NDAC Not Data Accepted

NRFD Not Ready For Data

RAM random-access memory

REN Remote Enable

s seconds

SRQ Service Request

TTL transistor-transistor logic

V volts

VA volt amperes

VAC volts alternating current

Contents

Main Page Limited Warranty Copyright Trademarks WARNING REGARDING MEDICAL AND CLINICAL USE OF NATIONAL INSTRUMENTS PRODUCTS FCC/DOC Radio Frequency Interference Compliance Federal Communications Commission Canadian Department of Communications Instructions to Users Danger Contents Page About This Manual Organization of This Manual Conventions Used in This Manual Page Chapter 1 Introduction Description of the GPIB-120A Page What You Need to Get Started Optional Equipment Unpacking Your GPIB-120A Chapter 2 Connection Isolation Considerations Placing Your Instruments Connecting the GPIB-120A Connecting to Hewlett-Packard Controllers Mounting the GPIB-120A Chapter 3 Theory of Operation Circuitry of the GPIB-120A The GPIB-120A Front Panel Power On System Controller Detection Active Controller Detection Source Handshake Detection Data Direction Control Parallel Poll Detection Acceptable Identification Codes Appendix A Operation of the GPIB History of the GPIB GPIB Operation Types of Messages Talkers, Listeners, and Controller The Controller-In-Charge and System Controller GPIB Signals and Lines Page Appendix A Operation of the GPIB National Instruments Corporation A-5 GPIB-120A User Manual Physical and Electrical Characteristics Figure A-1. GPIB Connector and the Signal Assignment Page Page Configuration Restrictions: The Role of Expanders and Extenders Related Document Appendix B Specifications Page Page Multiline Interface Messages Hex Oct Dec ASCII Msg Hex Oct Dec ASCII Msg Message Definitions Multiline Interface Messages Hex Oct Dec ASCII Msg Hex Oct Dec ASCII Msg Appendix D Customer Communication Technical Support Form ___________________________________________________ GPIB-120A Hardware and Software Configuration Form Documentation Comment Form Glossary ___________________________________________________