National Instruments PXI-6238 User Manual page 162

source impedance A parameter of signal sources that reflects current-driving ability of voltage
sources (lower is better) and the voltage-driving ability of current sources
(higher is better).
synchronous 1. Hardware—A property of an event that is synchronized to a reference
2. Software—A property of a function that begins an operation and
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.
t Gate hold time.
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.
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clock.
returns only when the operation is complete. A synchronous process is,
therefore, locked and no other processes can run during this time.
G-17
Glossary
NI 6238/6239 User Manual