National Instruments DAQ X Series User Manual page 281

T
task In NI-DAQmx, a collection of one or more channels, timing, and triggering
and other properties that apply to the task itself. Conceptually, a task
represents a measurement or generation you want to perform.
TC See terminal count.
terminal An object or region on a node through which data passes.
terminal count The highest value of a counter.
Gate hold time.
t
gh
t Gate setup time.
gsu
t Gate pulse width.
gw
timebase The reference signals for controlling the basic accuracy of time or
frequency-based measurements. For instruments, timebase refers to the
accuracy of the internal clock.
t Output delay time.
out
transducer A device that responds to a physical stimulus (heat, light, sound, pressure,
motion, flow, and so on), and produces a corresponding electrical signal.
See also sensor.
trigger 1. Any event that causes or starts some form of data capture.
2. An external stimulus that initiates one or more instrument functions.
t Source clock period.
sc
t Source pulse width.
sp
TTL Transistor-Transistor Logic—A digital circuit composed of bipolar
transistors wired in a certain manner. A typical medium-speed digital
technology. Nominal TTL logic levels are 0 and 5 V.
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Trigger stimuli include a front panel button, an external input voltage
pulse, or a bus trigger command. The trigger may also be derived from
attributes of the actual signal to be acquired, such as the level and slope
of the signal.
G-15
Glossary
X Series User Manual