Glossary
G-10
ni.com
P
passband
the range of frequencies which a device can properly propagate or measure
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.
PFI
programmable function input
Plug and Play
devices
devices that do not require DIP switches or jumpers to configure resources
on the devices—also called switchless devices
port
a communications connection on a computer or a remote controller
posttriggering
the technique used on a DAQ device to acquire a programmed number of
samples after trigger conditions are met
ppm
parts per million
pretriggering
the technique used on a DAQ device 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
Q
quantization error
the inherent uncertainty in digitizing an analog value due to the finite
resolution of the conversion process
quantizer
a device that maps a variable from a continuous distribution to a discrete
distribution
