National Instruments Printer PCI-1405 User Manual download pdf (Page 27)

Glossary

pixel count The total number of pixels between two horizontal synchronization signals.

The pixel count determines the frequency of the pixel clock.

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: 8 bits for red,

8 bits for green, 8 bits for blue, and 8 bits for the alpha value (unused).

ROI Region of interest. A hardware-programmable rectangular portion of the

acquisition window.

RS-170 The U.S. standard used for black-and-white television.

RSE Referenced single-ended. All measurements are made with respect to

a common reference measurement system or a ground. Also called a

grounded measurement system.

saturation

The amount of color pigment present. The lower the saturation, the more

white is present in the color. Pink is a red with low saturation.

scatter-gather DMA A type of DMA that allows the DMA controller to reconfigure on-the-fly.

SDRAM Synchronous dynamic RAM.

transfer rate The rate, measured in bytes/s, at which data is moved from source

to destination after software initialization and set up operations.

The maximum rate at which the hardware can operate.

trigger Any event that causes or starts some form of data capture.

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National Instruments Printer PCI-1405 User Manual Page 27