National Instruments NI USB-621x User Manual page 162

NRSE
O
offset
P
PCI
PCI Express
PCIe
period
periods
PFI
PGIA
physical channel
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Non-Referenced 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.
The unwanted DC voltage due to amplifier offset voltages added to a signal.
Peripheral Component Interconnect—A high-performance expansion bus
architecture originally developed by Intel to replace ISA and EISA. It offers
a theoretical maximum transfer rate of 132 MB/s.
A high-performance expansion bus architecture originally developed by
Intel to replace PCI. PCI Express offers a theoretical maximum transfer rate
that is dependent upon lane width. A ×1 link theoretically provides
250 MB/s in each direction—to and from the device. Once overhead is
accounted for, a ×1 link can provide approximately 200 MB/s of input
capability and 200 MB/s of output capability. Increasing the number of
lanes in a link increases maximum throughput by approximately the same
factor.
See PCI Express.
The period of a signal, most often measured from one zero crossing to the
next zero crossing of the same slope. The period of a signal is the reciprocal
of its frequency (in Hz). Period is designated by the symbol T.
The number of periods of a signal.
Programmable Function Interface.
Programmable Gain Instrumentation Amplifier.
See channel.
G-13
Glossary
NI USB-621x User Manual