National Instruments 653X Manuale Utente

M

Mega—the standard metric prefix for 1 million or 10

6

, when used with 

units of measure such as volts and hertz

Measurement & 
Automation Explorer 
(MAX)

a controlled centralized configuration environment that allows you to 
configure all of your National Instruments DAQ, GPIB, IMAQ, IVI, 
Motion, VISA, and VXI devices

MB/s

A unit for data transfer that means one million or 10

6 

bits per second

mask

the bits that are significant for pattern detection, also applies to change 
detection

MSB

Most Significant Bit

pattern I/O

Data-transfer mode in which 653X transfers data on the falling or rising 
edge of a TTL signal, typically at a constant rate

PCI

Peripheral Component Interconnect—A high-performance expansion bus 
architecture originally developed by Intel to replace ISA and EISA. It has 
achieved widespread acceptance as a standard for PCs and workstations; it 
offers a theoretical maximum transfer rate of 132 MB/s.

PCLK

see 

PCMCIA

An expansion bus architecture that has found widespread acceptance as a 
de facto standard in notebook-sized computers. It originated as a 
specification for add-on memory cards written by the Personal Computer 
Memory Card International Association.

peripheral device

any external device connected to the 653X device that the 653X controls, 
monitors, tests, or communicates with

Plug and Play ISA

a specification prepared by Micorsoft, Intel, and other PC-related 
companies that will result in PCs with plug-in boards that can be fully 
configured in software, without jumpers or switches on the devices

port

a collection of lines, usually eight

posttrigger

acquiring data that occurs after a trigger