National Instruments DAQ M Series - Manual (Page 147)

Glossary
© National Instruments Corporation G-13 NI 6236 User Manual
NI-PGIA See instrumentation amplifier .
non-referenced signal
sources Signal sources with voltage signals that are not connected to an absolute
reference or system ground. Also called floating signal sources. Some
common example of non-referenced signal sources are batteries,
transformers, or thermocouples.
NRSE 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.
O
offset The unwanted DC voltage due to amplifier offset voltages added to a signal.
P
PCI 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.
period 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.
periods The number of periods of a signal.
PFI Programmable Function Interface.
PGIA Programmable Gain Instrumentation Amplifier.
physical channel See channel .
Plug and Play devices Devices that do not require DIP switches or jumpers to configure resources
on the devices. Also called switchless devices port.
1. A communications connection on a computer or a remote controller;
2. A digital port, consisting of four or eight lines of digital input and/or
output.
posttriggering The technique used on a DAQ device to acquire a programmed number of
samples after trigger conditions are met.