User`s guide

146 Agilent VISA User’s Guide
attribute
In VISA and SICL, a value that indicates the operational
state of a resource. Some attributes can be changed;
others are read- only.
board
A GPIB interface. It may be a physical board, an adapter
(such as the 82357 USB/GPIB adapter), or a remote GPIB
interface.
board descriptor
A handle, returned from ibfind, that uniquely identifies a
GPIB interface (board) in Agilent 488 original API calls.
Also called an interface descriptor or board unit
descriptor.
board-level
Refers to Agilent 488 functions that operate on an
interface (board), rather than on a device.
bus error
An error that signals failure to access an address. Bus
errors occur in conjunction with low- level accesses to
memory, and usually involve hardware with bus mapping
capabilities. Bus errors may be caused by non- existent
memory, a non- existent register, an incorrect device
access, etc.
bus error handler
Software that runs when a bus error occurs.
CIC
Controller in Charge.