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Glossary
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National Instruments Corporation G-5 NI 5911 User Manual
O
Ohm’s Law (R=V/I)—the relationship of voltage to current in a resistance
overrange a segment of the input range of an instrument outside of the normal
measuring range. Measurements can still be made, usually with a
degradation in specifications.
P
PCI Peripheral Component Interconnect—a high-performance expansion bus
architecture originally developed by Intel to replace ISA and EISA; it is
achieving widespread acceptance as a standard for PCs and workstations
and offers a theoretical maximum transfer rate of 132 Mbytes/s
peak value the absolute maximum or minimum amplitude of a signal (AC + DC)
PXI PCI eXtensions for Instrumentation. PXI is an open specification that
builds off the CompactPCI specification by adding
instrumentation-specific features.
R
Rresistor
RAM random-access memory
resolution the smallest signal increment that can be detected by a measurement
system. Resolution can be expressed in bits or in digits. The number of bits
in a system is roughly equal to 3.3 times the number of digits.
rms root mean square—a measure of signal amplitude; the square root of the
average value of the square of the instantaneous signal amplitude
ROM read-only memory
CBIHWum.book Page 5 Thursday, October 29, 1998 1:56 PM