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Glossary
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National Instruments Corporation G-3 DIO 6533 User Manual
crosstalk an unwanted signal on one channel due to an input on a different
channel
current drive capability the amount of current a digital or analog output channel is capable of
sourcing or sinking while still operating within voltage range
specifications
current sinking the ability of a DAQ board to dissipate current for analog or digital
output signals
current sourcing the ability of a DAQ board to supply current for analog or digital output
signals
D
DAQ data acquisition—(1) collecting and measuring electrical signals from
sensors, transducers, and test probes or fixtures and inputting them to a
computer for processing; (2) collecting and measuring the same kinds
of electrical signals with A/D and/or DIO boards plugged into a
computer, and possibly generating control signals with D/A and/or DIO
boards in the same computer
DC direct current
device a plug-in data acquisition board, card, or pad that can contain multiple
channels and conversion devices. Plug-in boards, PCMCIA cards, and
devices such as the DAQPad-1200, which connects to your computer
parallel port, are all examples of DAQ devices. SCXI modules are
distinct from devices, with the exception of the SCXI-1200, which is a
hybrid.
digital input group a collection of digital input ports. You can associate each group with its
own clock rates, handshaking modes, buffer configurations, and so on.
A port cannot belong to more than one group.
digital output group a collection of digital output ports. You can associate each group with
its own clock rates, handshaking modes, buffer configurations, and so
forth. A port cannot belong to more than one group.
digital trigger a TTL level signal having two discrete levels—a high and a low level—
that starts or stops an operation
DIO digital input/output