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Glossary
G-4
ni.com
F
FIFO
First-in first-out memory buffer. The first data stored is the first data sent
to the acceptor; FIFOs are used on IMAQ devices to temporarily store
incoming data until that data can be retrieved.
to the acceptor; FIFOs are used on IMAQ devices to temporarily store
incoming data until that data can be retrieved.
ft
Feet.
H
h
Hour.
Hz
Hertz. Frequency in units of one cycle per second.
I
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.
communications channels, operator interface devices, and/or data
acquisition and control interfaces.
IC
Integrated circuit.
IEEE
Institute of Electrical and Electronics Engineers.
in.
Inches.
instrument driver
A set of high-level software functions, such as NI-IMAQ, that control
specific plug-in computer boards. Instrument drivers are available in
several forms, ranging from a function callable from a programming
language to a virtual instrument (VI) in LabVIEW.
specific plug-in computer boards. Instrument drivers are available in
several forms, ranging from a function callable from a programming
language to a virtual instrument (VI) in LabVIEW.
interrupt
A computer signal indicating that the CPU should suspend its current task
to service a designated activity.
to service a designated activity.
interrupt level
The relative priority at which a device can interrupt.
IRQ Interrupt request. See interrupt.