National Instruments PCI-1405 User Manual page 24

Glossary
composite video
contrast
D
DAQ
DMA
driver
dynamic range
E
external trigger
NI PCI-1405 User Manual
A type of color video transmission where synchronization, luma, and
chroma information are transmitted on one analog signal.
A constant multiplication factor applied to the luma and chroma
components of a color pixel in the color decoding process.
Data acquisition. (1) Collecting and measuring electrical signals from
sensors, transducers, and test probes or fixtures and inputting them to a
computer for processing. (2) Collecting and measuring the same kinds of
electrical signals with A/D or DIO boards plugged into a computer and
possibly generating control signals with D/A and/or DIO boards in the
same computer.
Direct memory access. A method by which data can be transferred to
and from computer memory from and to a device or memory on the bus
while the processor does something else; DMA is the fastest method of
transferring data to/from computer memory.
Software that controls a specific hardware device, such as an image
acquisition device.
The ratio of the largest signal level a circuit can handle to the smallest
signal level it can handle (usually taken to be the noise level), normally
expressed in decibels.
A voltage pulse from an external source that triggers an event, such as
A/D conversion.
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