Glossary
SCXI-1125 User Manual G-8 ni.com
ppm parts per million
PXI A rugged, open system for modular instrumentation based on CompactPCI,
with special mechanical, electrical, and software features. The PXIbus
standard was originally developed by National Instruments in 1997, and is
now managed by the PXIbus Systems Alliance.
Rresolution The smallest signal increment that can be detected by a measurement
system. Resolution can be expressed in bits, in proportions, or in percent of
full scale. For example, a system has 12-bit resolution, one part in 4,096
resolution, and 0.0244% of full scale.
RMA return Material Authorization
rms root mean square
RSVD reserved bit/signal
RTI referred to input—Calculates a specification relative to the input range.
Ss seconds
sample An instantaneous measurement of a signal, normally using an
analog-to-digital converter in an E Series DAQ device.
sample rate The number of samples a system takes over a given time period, usually
expressed in samples per second.
scan One or more analog or digital input samples. Typically, the number of input
samples in a scan is equal to the number of channels in the input group. For
example, one pulse from the scan clock produces one scan which acquires
one new sample from every analog input channel in the group.
SCANCLK Scan clock signal used to increment the next channel after each E Series
DAQ device analog-to-digital conversion.