Glossary

L

 

LabVIEW

A graphical programming language.

LED

Light-Emitting Diode—A semiconductor light source.

lowpass filter

A filter that passes signals below a cutoff frequency while blocking signals

 

above that frequency.

LSB

Least Significant Bit.

M

 

m

Meter.

M Series

An architecture for instrumentation-class, multichannel data acquisition

 

devices based on the earlier E Series architecture with added new features.

measurement

The quantitative determination of a physical characteristic. In practice,

 

measurement is the conversion of a physical quantity or observation to a

 

domain where a human being or computer can determine the value.

measurement device

DAQ devices, such as the M Series multifunction I/O (MIO) devices, SCXI

 

signal conditioning modules, and switch modules.

MHz

Megahertz—A unit of frequency; 1 MHz = 106 Hz = 1,000,000 Hz.

micro (μ)

The numerical prefix designating 10–6.

MIO

Multifunction I/O—DAQ module. Designates a family of data acquisition

 

products that have multiple analog input channels, digital I/O channels,

 

timing, and optionally, analog output channels. An MIO product can be

 

considered a miniature mixed signal tester, due to its broad range of signal

 

types and flexibility. Also known as multifunction DAQ.

MITE

MXI Interface To Everything—A custom ASIC designed by National

 

Instruments that implements the PCI bus interface. The MITE supports bus

 

mastering for high-speed data transfers over the PCI bus.

module

A board assembly and its associated mechanical parts, front panel, optional

 

shields, and so on. A module contains everything required to occupy one or

 

more slots in a mainframe. SCXI and PXI devices are modules.

© National Instruments Corporation

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NI USB-621x User Manual