National Instruments NI 5102 用户手册
Glossary
© National Instruments Corporation
G-13
NRSE
nonreferenced single-ended mode—all measurements are made with
respect to a common (NRSE) measurement system reference, but the
voltage at this reference can vary with respect to the measurement
system ground
respect to a common (NRSE) measurement system reference, but the
voltage at this reference can vary with respect to the measurement
system ground
Nyquist Sampling
Theorem
Theorem
a law of sampling theory stating that if a continuous bandwidth-limited
signal contains no frequency components higher than half the frequency
at which it is sampled, then the original signal can be recovered without
distortion
signal contains no frequency components higher than half the frequency
at which it is sampled, then the original signal can be recovered without
distortion
O
onboard channels
channels provided by the plug-in DAQ device
onboard RAM
optional RAM usually installed into SIMM slots
operating system
base-level software that controls a computer, runs programs, interacts with
users, and communicates with installed hardware or peripheral devices
users, and communicates with installed hardware or peripheral devices
P
passband
the range of frequencies that a device can properly propagate or measure
PC Card
a credit-card-sized expansion card that fits in a PCMCIA slot; often
referred to as a PCMCIA card
referred to as a PCMCIA card
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;
it offers a theoretical maximum transfer rate of 132 Mbytes/s
architecture originally developed by Intel to replace ISA and EISA. It is
achieving widespread acceptance as a standard for PCs and workstations;
it offers a theoretical maximum transfer rate of 132 Mbytes/s
PCMCIA
an expansion bus architecture that has found widespread acceptance
as a de facto standard in notebook-size computers. It originated as a
specification for add-on memory cards written by the Personal Computer
Memory Card International Association
as a de facto standard in notebook-size computers. It originated as a
specification for add-on memory cards written by the Personal Computer
Memory Card International Association
peak to peak
a measure of signal amplitude; the difference between the highest and
lowest excursions of the signal
lowest excursions of the signal
pF
picofarads
PFI
programmable function input