Glossary
© National Instruments Corporation G-7 R Series Intelligent DAQ User Manual
R
RAM Random-access memory—The generic term for the read/write memory that
is used in computers. RAM allows bits and bytes to be written to it as well
as read from. Various types of RAM are DRAM, EDO RAM, SRAM, and
VRAM.
resolution The smallest signal increment that can be detected by a measurement
system. Resolution can be expressed in bits, in proportions, or in percent
offull scale. For example, a system has 12-bit resolution, one part in
4,096 resolution, and 0.0244% of full scale.
RIO Reconfigurable I/O.
rms Root mean square.
RSE Referenced single-ended mode—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 bus—The timing and triggering bus that
connects multiple devices directly. This allows for hardware
synchronization across devices.
S
s Seconds.
S Samples.
S/s Samples per second—Used to express the rate at which a DAQ board
samples an analog signal.
signal conditioning The manipulation of signals to prepare them for digitizing.
slew rate The voltage rate of change as a function of time. The maximum slew rate
of an amplifier is often a key specification to its performance. Slew rate
limitations are first seen as distortion at higher signal frequencies.