National Instruments NI 784xR User Manual page 69

Ni r series intelligent daq
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C
C
CalDAC
CH
cm
CMOS
CMRR
common-mode voltage
CompactPCI
D
D/A
DAC
DAQ
dB
DC
DGND
DIFF
© National Instruments Corporation
Celsius.
Calibration DAC.
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.
Centimeter.
Complementary metal-oxide semiconductor.
Common-mode rejection ratio—A measure of an instrument's ability to
reject interference from a common-mode signal, usually expressed in
decibels (dB).
Any voltage present at the instrumentation amplifier inputs with respect to
amplifier ground.
Refers to the core specification defined by the PCI Industrial Computer
Manufacturer's Group (PICMG).
Digital-to-analog.
Digital-to-analog converter—An electronic device, often an integrated
circuit, that converts a digital number into a corresponding analog voltage
or current.
Data acquisition—A system that uses the computer to collect, receive,
and generate electrical signals.
Decibel—The unit for expressing a logarithmic measure of the ratio of
two signal levels: dB = 20log10 V1/V2, for signals in volts.
Direct current.
Digital ground signal.
Differential mode.
G-3
R Series Intelligent DAQ User Manual
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