National Instruments DAQ PCI E Series User Manual page 143

N
NC
NI-DAQ
noise
NRSE
O
OUT
P
PCI
PFI
PFI0/TRIG1
PFI1/TRIG2
PFI2/CONVERT*
PFI3/GPCTR1_SOURCE
PFI4/GPCTR1_GATE
© National Instruments Corporation
normally closed, or not connected
NI driver software for DAQ hardware
an undesirable electrical signal—Noise comes from external
sources such as the AC power line, motors, generators,
transformers, fluorescent lights, CRT displays, computers,
electrical storms, welders, radio transmitters, and internal sources
such as semiconductors, resistors, and capacitors. Noise corrupts
signals you are trying to send or receive.
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
output pin—a counter output pin where the counter can generate
various TTL pulse waveforms
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 MB/s.
Programmable Function Input
PFI0/trigger 1
PFI1/trigger 2
PFI2/convert
PFI3/general purpose counter 1 source
PFI4/general purpose counter 1 gate
G-7
Glossary
PCI E Series User Manual