Glossary
© National Instruments Corporation G-15 M Series User Manual
PXI_STAR A special set of trigger lines in the PXI backplane for high-accuracy device
synchronization with minimal latencies on each PXI slot. Only devices in
the PXI Star controller Slot 2 can set signal on this line. For additional
information concerning PXI star signal specifications and capabilities, read
the PXI Specification located at
www.pxisa.org/specs.
PXIe See PXI Express.
Q
quadrature encoder An encoding technique for a rotating device where two tracks of
information are placed on the device, with the signals on the tracks offset
by 90° from each other. This makes it possible to detect the direction of the
motion.
R
range The maximum and minimum parameters between which a sensor,
instrument, or device operates with a specified set of characteristics. This
may be a voltage range or a frequency range.
real time 1. Displays as it comes in; no delays.
2. A property of an event or system in which data is processed and acted
upon as it is acquired instead of being accumulated and processed at a
later time.
3. Pertaining to the performance of a computation during the actual time
that the related physical process transpires so results of the
computation can be used in guiding the physical process.
RSE Referenced Single-Ended configuration—All measurements are made with
respect to a common reference measurement system or a ground. Also
called a grounded measurement system.
RTSI Real-Time System Integration.
RTSI bus Real-Time System Integration bus—The National Instruments timing bus
that connects DAQ devices directly, by means of connectors on top of the
devices, for precise synchronization of functions.
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