Glossary
NI-488.2M UM for Windows NT
Glossary-8
© National Instruments Corp.
T
TAD (Talk Address)
See MTA .
Talker
A GPIB device that sends data messages to Listeners.
TCT
The GPIB command used to pass control of the bus from the
(Take Control)
current Controller to an addressed Talker.
timeout
A feature of the NI-488.2M driver that prevents I/O functions
from hanging indefinitely when there is a problem on the
GPIB.
TLC
An integrated circuit that implements most of the GPIB
Talker, Listener, and Controller functions in hardware.
U
ud
(unit descriptor)
A variable name and first argument of each function call that
contains the unit descriptor of the GPIB interface board or
other GPIB device that is the object of the function.
UNL (Unlisten)
The GPIB command used to unaddress any active Listeners.
UNT (Untalk)
The GPIB command used to unaddress an active Talker.
