National Instruments NI 783xR Benutzerhandbuch

© National Instruments Corporation

C

Celsius.

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.