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Glossary
PCI-1200 User Manual G-6 © National Instruments Corporation
P
PA, PB, PC <0..7> port A, B, or C 0 through 7 signals
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 work-stations;
it offers a theoretical maximum transfer rate of 132 Mbytes/s.
port a digital port, consisting of four or eight lines of digital input and/or output
postriggering the technique used on a DAQ board to acquire a programmed number of
samples after trigger conditions are met
POSTTRIG posttrigger mode
PPI programmable peripheral interface
ppm parts per million
PRETRIG pretrigger mode
pretriggering the technique used on a DAQ board to keep a continuous buffer filled with
data, so that when the trigger conditions are met, the sample includes the
data leading up to the trigger condition
R
RD* read signal
R
EXT
external resistance
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.
S
s seconds