National Instruments IMAQ PCI-1407 User Manual page 50

Glossary
sync
system RAM
T
transfer rate
TRIG
trigger
trigger control and
mapping circuitry
TTL
V
VI
video line
VSYNC
W
white reference level
IMAQ PCI/PXI-1407 User Manual
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.
RAM installed on a personal computer and used by the operating system,
as contrasted with onboard RAM.
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 signal.
Any event that causes or starts some form of data capture.
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.
Transistor-transistor logic (0 to 5 V single-ended signal).
Virtual Instrument. (1) A combination of hardware and/or software
elements, typically used with a PC, that has the functionality of a classic
stand-alone instrument (2) A LabVIEW software module (VI), which
consists of a front panel user interface and a block diagram program.
A video line consists of a HSYNC, back porch, active pixel region, and a
front porch.
Vertical synchronization signal. The synchronization pulse generated at the
beginning of each video field that tells the video monitor when to start a
new field.
The level that defines what is white for a particular video system. See also
black reference level.
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