User`s guide

136 Agilent VISA User’s Guide
Glossary
interface messages
GPIB commands encoded as individual bytes. Also called GPIB
commands or command bytes.
interface session
A session that communicates and controls parameters affecting an
entire interface.
interrupt
An asynchronous event that requires attention and actions that are
out of the normal flow of control of a program.
IO Control
The icon in the Windows notification area (usually the lower right
corner of your screen). The IO Control gives you access to Agilent
I/O utilities such as Connection Expert, Agilent I/O documentation,
and VISA options.
IO Libraries
Application programming interfaces (APIs) for direct I/O
communication between applications and devices. There are four
Agilent IO Libraries in the Agilent IO Libraries Suite: VISA, VISA
COM, SICL, and Agilent 488.
Listener
A device that can receive data from the bus when instructed
(addressed to listen) by the System Controller.
lock
A state that prohibits other users from accessing a resource such as a
device or interface.