National Instruments Image Acquisition Software User Manual
Page 63
Glossary
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National Instruments Corporation
syntax
the set of rules to which statements must conform in a particular
programming language
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
TRIG
trigger signal
trigger
any event that causes or starts some form of data capture
trigger control and
mapping circuitry
circuitry that routes, monitors, and drives the 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
U
UV plane
See YUV.
V
V
volts
VCO
voltage-controlled oscillator—an oscillator that changes frequency
depending on a control signal; used in a PLL to generate a stable pixel clock
VI
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
video line
a video line consists of a HSYNC, back porch, active pixel region, and a
front porch
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