National Instruments DAQ X Series User Manual page 277

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NI National Instruments.
NI-DAQmx The latest NI-DAQ driver with new VIs, functions, and development tools
for controlling measurement devices. The advantages of NI-DAQmx over
Traditional NI-DAQ (Legacy) include the DAQ Assistant for configuring
channels and measurement tasks for your device for use in LabVIEW,
LabWindows/CVI, and Measurement Studio; increased performance such
as faster single-point analog I/O; and a simpler API for creating DAQ
applications using fewer functions and VIs than earlier versions of NI-DAQ.
NI-PGIA See
non-referenced Signal sources with voltage signals that are not connected to an absolute
signal sources reference or system ground. Also called floating signal sources. Some
common example of non-referenced signal sources are batteries,
transformers, or thermocouples.
NRSE Non-Referenced Single-Ended mode—All measurements are made with
respect to a common (NRSE) measurement system reference, but the
voltage at this reference can vary with respect to the measurement system
ground.
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offset The unwanted DC voltage due to amplifier offset voltages added to a signal.
P
PCI Express A high-performance expansion bus architecture originally developed by
Intel to replace PCI. PCI Express offers a theoretical maximum transfer rate
that is dependent upon lane width. A x1 link theoretically provides
250 MB/s in each direction—to and from the device. Once overhead is
accounted for, a x1 link can provide approximately 200 MB/s of input
capability and 200 MB/s of output capability. Increasing the number of
lanes in a link increases maximum throughput by approximately the same
factor.
period The period of a signal, most often measured from one zero crossing to the
next zero crossing of the same slope. The period of a signal is the reciprocal
of its frequency (in Hz). Period is designated by the symbol T.
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instrumentation amplifier.
G-11
Glossary
X Series User Manual