National Instruments NI 6120 用户手册
Glossary
© National Instruments Corporation
G-9
PFI2/CONVERT*
PFI2/convert
PFI3/GPCTR1_SOURCE
PFI3/general purpose counter 1 source
PFI4/GPCTR1_GATE
PFI4/general-purpose counter 1 gate
PFI5/UPDATE*
PFI5/update
PFI6/WFTRIG
PFI6/waveform trigger
PFI7/STARTSCAN
PFI7/start of scan
PFI8/GPCTR0_SOURCE
PFI8/general-purpose counter 0 source
PFI9/GPCTR0_GATE
PFI9/general-purpose counter 0 gate
PGIA
programmable gain instrumentation amplifier
PLL
phase-locked loop
ppm
parts per million
pseudodifferential
channels
channels
pseudodifferential channels are all referred to a common ground, but this
ground is not directly connected to the computer ground. Often this
connection is made by a relatively low value resistor to give some
isolation between the two grounds.
ground is not directly connected to the computer ground. Often this
connection is made by a relatively low value resistor to give some
isolation between the two grounds.
pu
pull up
PWB
printed wire board
PXI
PCI eXtensions for Instrumentation—an open specification that builds
off the CompactPCI specification by adding instrumentation-specific
features
off the CompactPCI specification by adding instrumentation-specific
features
R
range
the maximum and minimum parameters between which a sensor,
instrument, or device operates with a specified set of characteristics
instrument, or device operates with a specified set of characteristics
referenced signal
sources
sources
signal sources with voltage signals that are referenced to a system ground,
such as the earth or a building ground; also called grounded signal
sources
such as the earth or a building ground; also called grounded signal
sources