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Glossary
© National Instruments Corporation G-9 NI PXI/PCI-1411 User Manual
S
S-Video A type of color video transmission where timing and luma information are
transmitted on one analog signal and chroma is transmitted on a separate
analog signal.
saturation The amount of white added to a pure color. Saturation relates to the richness
of a color. A saturation of zero corresponds to a pure color with no white
added. Pink is a red with low saturation.
scaling down circuitry Circuitry that scales down the resolution of a video signal.
scatter-gather DMA A type of DMA that allows the DMA controller to reconfigure on-the-fly.
SDRAM Synchronous dynamic RAM.
SRAM Static RAM.
sync Tells the display where to put a video picture. The horizontal sync indicates
the picture’s left-to-right placement and the vertical sync indicates
top-to-bottom placement.
system RAM RAM installed on a personal computer and used by the operating system,
as contrasted with onboard RAM.
T
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.
trigger control and
mapping circuitry
Circuitry that routes, monitors, and drives external and RTSI bus trigger
lines. You can configure each of these lines to start or stop acquisition on a
rising or falling edge.
TTL Transistor-transistor logic.