Glossary
© National Instruments Corp.
Glossary-5
NI-488.2M UM for Windows NT
L
LAD (listen address)
See MLA .
language interface
Code that enables an application program that uses NI-488
functions or NI-488.2 routines to access the driver.
Listener
A GPIB device that receives data messages from a Talker.
LLO
The GPIB command used to tell all devices that they may or
(Local Lockout)
should ignore remote (GPIB) data messages or local (front
panel) controls, depending on whether the device is in local or
remote program mode.
low-level function
A rudimentary board or device function that performs a single
operation.
M
m
Meters.
MAV
The Message Available bit is part of the IEEE 488.2-defined
status byte which is received from a device responding to a
serial poll.
MB
Megabytes of memory.
memory-resident
Resident in RAM.
MLA A
GPIB command used to address a device to be
(My Listen Address)
a Listener. It can be any one of the 31 primary addresses.
MSA
The GPIB command used to address a device to be a Listener
(My Secondary
or a Talker when extended (two byte) addressing is used. The
Address)
complete address is a MLA or MTA address followed by an
MSA address. There are 31 secondary addresses for a total of
961 distinct listen or talk addresses for devices.
MTA A
GPIB command used to address a device to be a Talker. It
(My Talk Address)
can be any one of the 31 primary addresses.
multitasking
The concurrent processing of more than one program or task.