National Instruments NI 783xR Bedienungsanleitung PDF herunterladen (Seite 68)

Glossary

CCelsius.

CalDAC Calibration DAC.

CH Channel—Pin or wire lead to which you apply or from which you read the

analog or digital signal. Analog signals can be single-ended or differential.

For digital signals, you group channels to form ports. Ports usually consist

of either four or eight digital channels.

cm Centimeter.

CMOS Complementary metal-oxide semiconductor.

CMRR Common-mode rejection ratio—A measure of an instrument’s ability to

reject interference from a common-mode signal, usually expressed in

decibels (dB).

common-mode voltage Any voltage present at the instrumentation amplifier inputs with respect to

amplifier ground.

CompactPCI Refers to the core specification defined by the PCI Industrial Computer

Manufacturer’s Group (PICMG).

D/A Digital-to-analog.

DAC Digital-to-analog converter—An electronic device, often an integrated

circuit, that converts a digital number into a corresponding analog voltage

or current.

DAQ Data acquisition—A system that uses the computer to collect, receive, and

generate electrical signals.

dB Decibel—The unit for expressing a logarithmic measure of the ratio of

two signal levels: dB = 20log10 V1/V2, for signals in volts.

DC Direct current.

DGND Digital ground signal.

DIFF Differential mode.

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National Instruments NI 783xR Bedienungsanleitung Seite 68