National Instruments IMAQ PCI-1409, Руководство пользователя

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Glossary
IMAQ PCI/PXI-1409 User Manual G-6 ni.com
H
h Hour.
hardware The physical components of a computer system, such as the circuit boards,
plug-in boards, chassis, enclosures, peripherals, and cables.
HSYNC Horizontal synchronization signal. The synchronization pulse signal
produced at the beginning of each video scan line that keeps a video
monitor’s horizontal scan rate in step with the transmission of each new
line.
hue Represents the dominant color of a pixel. The hue function is a continuous
function that covers all the possible colors generated using the R, G, and B
primaries.
See also RGB .
Hz Hertz. Frequency in units of 1/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.
IC Integrated circuit.
IEEE Institute of Electrical and Electronics Engineers.
in. Inches.
INL Integral nonlinearity. A measure of LSB of the worst-case deviation from
the ideal A/D or D/A transfer characteristic of the analog I/O circuitry.
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.
interlaced A video frame composed of two interleaved fields. The number of lines in
a field are half the number of lines in an interlaced frame.
interpreter A software utility that executes source code from a high-level language
such as Basic, C or Pascal, by reading one line at a time and executing the
specified operation.