National-instruments Signal Processing Engineering Educational Device N Manual do Utilizador descarregar pdf (Página 38)

Glossary

NI SPEEDY-33 User Manual G-6 ni.com

flash

A form of rewritable memory chip that, unlike a Random Access Memory

chip, holds content without maintaining a power supply.

frequency The number of alternating signals that occur per unit time.

ft feet

h hour

Hz hertz—Cycles per second of a periodic signal; the unit of measure for

frequency.

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.

in. inch or inches

instrument driver A set of high-level software functions that controls a specific GPIB, VXI,

or RS232 programmable instrument or a specific plug-in DAQ device.

Instrument drivers are available in several forms, ranging from a function

callable language to a virtual instrument (VI) in LabVIEW. You can

download instrument drivers from the Instrument Driver Network at

ni.com/idnet.

jack See port.

jumper A small rectangular device used to connect two adjacent posts on a circuit

board. Jumpers are used on some SCXI modules and terminal blocks to

either select certain parameters or enable/disable circuit functionality.

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National-instruments Signal Processing Engineering Educational Device N Manual do Utilizador Página 38