National Instruments Interface Device NI PCI-1426 - Manual (Page 31)

Glossary
© National Instruments Corporation G-3 NI PCI-1426 User Manual
Q
quadrature encoder A device that converts angular rotation into two pulse trains, A and B. The
phase difference between A and B transmits information about the
direction of rotation and the number of transitions indicates the amount of
rotation.
R
real time A property of an event or system in which data is processed as it is acquired
instead of being accumulated and processed at a later time.
resolution The smallest signal increment that can be detected by a measurement
system. Resolution can be expressed in bits, in proportions, or in
percent of full scale. For example, a system has 12-bit resolution,
one part in 4,096 resolution, and 0.0244 percent of full scale.
RGB Color encoding scheme using red, green, and blue (RGB) color information
where each pixel in the color image is encoded using 32 bits: eight bits for
red, eight bits for green, eight bits for blue, and eight bits for the alpha value
(unused).
ROI Region of interest. A hardware-programmable rectangular portion of the
acquisition window.
RTSI bus Real-Time System Integration Bus. The National Instruments timing bus
that connects image acquisition and DAQ devices directly, by means of
connectors on the devices, for precise synchronization of functions.
S
scatter-gather DMA A type of DMA that allows the DMA controller to reconfigure on-the-fly.
SDRAM Synchronous dynamic RAM.