© National Instruments Corporation v GPIB-120B User ManualContentsAbout This ManualConventions ...................................................................................................................viiRelated Documentation..................................................................................................viiiChapter 1IntroductionDescription of the GPIB-120B ......................................................................................1-1What You Need to Get Started ......................................................................................1-3Optional Equipment.........................................................................................1-4Unpacking Your GPIB-120B ..........................................................................1-5Chapter 2Hardware OverviewGPIB-120B LEDs ..........................................................................................................2-1Power On (PWR).............................................................................................2-1System Controller Detection (SC)...................................................................2-2Active Controller Detection (AC) ...................................................................2-2Source Handshake Detection (SH)..................................................................2-2Data Transfer Modes .....................................................................................................2-2Selecting a Data Transfer Mode ......................................................................2-3Unbuffered Mode ..............................................................................2-3Buffered Mode ..................................................................................2-3Setting the Data Transfer Mode ......................................................................2-4Data Direction Control...................................................................................................2-4Parallel Poll Detection ...................................................................................................2-4Parallel Poll Operation...................................................................................................2-5Chapter 3Configuring and Using Your HardwareConnecting the GPIB-120B ...........................................................................................3-1Appendix AGPIB BasicsAppendix BMultiline Interface Messages