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Glossary
VXI-USB User Manual G-6 ni.com
L
logical address An 8-bit number that uniquely identifies each VXIbus device in a system.
It defines the A16 register address of a device, and indicates Commander
and Servant relationships.
M
m meters
M mega—(1) the standard metric prefix for 1 million or 10
6
, when used with
units of measure such as volts and hertz; (2) the prefix for 1,048,576, or 2
20
,
when used with B (byte) to quantify data or computer memory.
master A functional part of a VME/VXIbus device that initiates data transfers on
the backplane. A transfer can be either a read or a write.
message-based
device
An intelligent device that implements the defined VXIbus registers and
communication protocols. These devices are able to use Word Serial
Protocol to communicate with one another through communication
registers.
MODID Module ID lines—used in VXI to geographically locate boards and to
dynamically configure boards.
MTBF Mean Time Between Failure
MXI-3 A PCI Master/Slave system implementing the PCI-to-PCI Bridge register
set. It couples two physically separate PCI buses with either a copper or
fiber optic data link capable of 1.5 Gbits/s serial data rates.
N
NI-488.2 or
NI-488.2M
The National Instruments industry-standard software for controlling
GPIB instruments.
NI-DAQ The National Instruments industry-standard software for data acquisition
instruments.
NI-VISA The National Instruments implementation of the VISA standard; an
interface-independent software that provides a unified programming
interface for VXI, GPIB, and serial instruments.