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Glossary
NI-IMAQdx User Manual G-2 ni.com
D
default setting A default parameter value recorded in the driver. In many cases, the default
input of a control is a certain value (often 0).
DLL Dynamic Link Library—A software module in Microsoft Windows
containing executable code and data that can be called or used by Windows
applications or other DLLs; functions and data in a DLL are loaded and
linked at run time when they are referenced by a Windows application or
other DLLs.
driver Software that controls a specific hardware device, such as a camera.
E
endianness The convention describing the ordering of bytes in memory or the sequence
in which bytes are transmitted.
external trigger A voltage pulse from an external source that triggers an event such as
A/D conversion.
F
FIFO First-In First-Out—The first data stored in the memory buffer is the first
data sent to the acceptor. FIFOs are used on image acquisition devices to
temporarily store incoming data until that data can be retrieved.
function A set of software instructions executed by a single line of code that may
have input and/or output parameters and returns a value when executed.
G
gamma The nonlinear change in the difference between the video signal’s
brightness level and the voltage level needed to produce that brightness.
Gigabit Ethernet Describes technologies which transmit Ethernet packets at a rate of a
gigabit per second.