National Instruments NI 783xR Benutzerhandbuch
Glossary
© National Instruments Corporation
G-3
C
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.
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).
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.
amplifier ground.
CompactPCI
Refers to the core specification defined by the PCI Industrial Computer
Manufacturer’s Group (PICMG).
Manufacturer’s Group (PICMG).
D
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.
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.
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.
two signal levels: dB = 20log10 V1/V2, for signals in volts.
DC
Direct current.
DGND
Digital ground signal.
DIFF
Differential mode.