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Glossary © National Instruments Corporation G-5 Mult ifunction Reconfigurable I/O User Manual M m Meter . max M aximum. min Minimum. MIO Multifunction I/O. monotonicity A characteristic of a D A C in whic h the analog ou…

Glossary

Multifunction Reconfigurable I/O User Manual G-4 © National Instruments Corporation

EEPROM Electrically erasable programmable read-only memory—ROM that can be

erased with an electrical signal and reprogrammed.

FPGA Field-Programmable Gate Array.

FPGA VI A configuration that is downloaded to the FPGA and that determines the

functionality of the hardware.

glitch An unwanted signal excursion of short duration that is usually unavoidable.

hHour.

HIL Hardware-in-the-loop.

Hz Hertz.

I/O Input/output—The transfer of data to/from a computer system involving

communications channels, operator interface devices, and/or data

acquisition and control interfaces.

INL Relative accuracy.

LabVIEW Laboratory Virtual Instrument Engineering Workbench. LabVIEW is a

graphical programming language that uses icons instead of lines of text to

create programs.

LSB Least significant bit.

Glossary

m Meter.

max Maximum.

min Minimum.

MIO Multifunction I/O.

monotonicity A characteristic of a DAC in which the analog output always increases as

the values of the digital code input to it increase.

mux Multiplexer—A switching device with multiple inputs that sequentially

connects each of its inputs to its output, typically at high speeds, in order to

measure several signals with a single analog input channel.

noise An undesirable electrical signal—Noise comes from external sources such

as the AC power line, motors, generators, transformers, fluorescent lights,

CRT displays, computers, electrical storms, welders, radio transmitters,

and internal sources such as semiconductors, resistors, and capacitors.

Noise corrupts signals you are trying to send or receive.

NRSE Nonreferenced single-ended mode—All measurements are made with

respect to a common (NRSE) measurement system reference, but the

voltage at this reference can vary with respect to the measurement system

ground.

OUT Output pin—A counter output pin where the counter can generate various

TTL pulse waveforms.

Glossary

Multifunction Reconfigurable I/O User Manual G-6 © National Instruments Corporation

PCI Peripheral Component Interconnect—A high-performance expansion bus

architecture originally developed by Intel to replace ISA and EISA. It is

achieving widespread acceptance as a standard for PCs and work-stations.

PCI offers a theoretical maximum transfer rate of 132 MB/s.

PCI Express Peripheral Component Interconnect Express— A version of PCI that

maintains the PCI software usage model and replaces the physical bus with

a high-speed serial bus serving multiple lanes.

port (1) A communications connection on a computer or a remote controller.

(2) A digital port, consisting of four or eight lines of digital input and/or

output.

pu Pull-up.

PWM Pulse-width modulation.

PXI PCI eXtensions for Instrumentation—An open specification that builds off

the CompactPCI specification by adding instrumentation-specific features.

RAM Random-access memory—The generic term for the read/write memory that

is used in computers. RAM allows bits and bytes to be written to it as well

as read from. Various types of RAM are DRAM, EDO RAM, SRAM, and

VRAM.

resolution The smallest signal increment that can be detected by a measurement

system. Resolution can be expressed in bits, in proportions, or in percent

of full scale. For example, a system has 12-bit resolution, one part in

4,096 resolution, and 0.0244% of full scale.

RIO Reconfigurable I/O.

rms Root mean square.

RSE Referenced single-ended mode—All measurements are made with respect

to a common reference measurement system or a ground. Also called a

grounded measurement system.

RTSI Real-time system integration bus—The timing and triggering bus that

connects multiple devices directly. This allows for hardware

synchronization across devices.