National Instruments Multifunction RIO NI R Series, Руководство пользователя

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Glossary
R Series Multifunction RIO User Manual G-6 © National Instruments Corporation
P
PCI Peripheral Component Interconnect—A high-performance expansion b
u
s
architect
u
re originally developed by Intel to replace ISA and EISA. It is
achieving widespread acceptance as a standard for PCs and work-stations.
PCI offers a theoretical maxim
u
m transfer rate of 132 MB/s.
PCI Express Peripheral Component Interconnect Express— A version of PCI that
maintains the PCI software
u
sage model and replaces the physical b
u
s with
a high-speed serial b
u
s serving m
u
ltiple lanes.
port (1) A comm
u
nications connection on a comp
u
ter or a remote controller.
(2) A digital port, consisting of fo
u
r or eight lines of digital inp
u
t and/or
o
u
tp
u
t.
p
u
P
u
ll-
u
p.
PWM P
u
lse-width mod
u
lation.
PXI PCI eXtensions for Instr
u
mentation—An open specification that b
u
ilds off
the CompactPCI specification by adding instr
u
mentation-specific feat
u
res.
R
RAM Random-access memory—The generic term for the read/write memory that
is
u
sed in comp
u
ters. RAM allows bits and bytes to be written to it as well
as read from. Vario
u
s types of RAM are DRAM, EDO RAM, SRAM, and
VRAM.
resol
u
tion The smallest signal increment that can be detected by a meas
u
rement
system. Resol
u
tion can be expressed in bits, in proportions, or in percent
of f
u
ll scale. For example, a system has 12-bit resol
u
tion, one part in
4,096 resol
u
tion, and 0.0244% of f
u
ll scale.
RIO Reconfig
u
rable I/O.
rms Root mean sq
u
are.
RSE Referenced single-ended mode—All meas
u
rements are made with respect
to a common reference meas
u
rement system or a gro
u
nd. Also called a
gro
u
nded meas
u
rement system.
RTSI Real-time system integration b
u
s—The timing and triggering b
u
s that
connects m
u
ltiple devices directly. This allows for hardware
synchronization across devices.