Glossary
SCXI-1125 User Manual G-4 ni.com
DAQ Data acquisition—(1) collecting and measuring electrical signals from
sensors, transducers, and test probes or fixtures and inputting them to a
computer for processing; (2) collecting and measuring the same kinds of
electrical signals with A/D and/or DIO boards plugged into a computer, and
possibly generating control signals with D/A and/or DIO boards in the
same computer.
DAQ device A device that collects signals for data acquisition devices. Examples are
MIO and 1200 boards.
dB decibel—The unit for expressing a logarithmic measure of the ratio of
two signal levels: dB = 20 log10 (V1/V2), for signals in volts.
DC direct current
device A plug-in data acquisition board, module, card, or pad that can contain
multiple channels and conversion devices.
differential input An input circuit that actively responds to the difference between two
terminals, rather than the difference between one terminal and ground.
DIN deutsche Industrie Norme
DIO digital I/O
DMM digital multimeter—A digital instrument capable of measuring several
different fundamental electrical characteristics, most often voltage,
resistance, and current.
EEEPROM electrically erasable programmable read-only memory—ROM that can be
erased with an electrical signal and reprogrammed.
EMC electromechanical compliance
EMI electromagnetic interference