Glossary
G-2
ni.com
B
bit
one binary digit, either 0 or 1
C
CE
European emissions control standard
C GND
chassis ground signal
channel
pin or wire lead to which you apply, or from which you read, an analog or
digital signal. Analog signals can be single-ended or differential. For digital
signals, channels (also known as lines) are grouped to form ports.
chassis
the enclosure that houses, powers, and controls SCXI modules
CLK
clock input signal
common-mode voltage
voltage that appears on both inputs of a differential amplifier
current excitation
a source that supplies the current needed by a sensor for its proper operation
D
D/A
digital-to-analog
D*/A
Data/Address
DAQ
data acquisition—(1) collecting and measuring electrical signals from
sensors, transducers, and test probes or fixtures and processing the
measurement data using a computer; (2) collecting and measuring the same
kinds of electrical signals with A/D and/or DIO devices plugged into a
computer, and possibly generating control signals with D/A and/or DIO
devices in the same computer
DAQ device
a data acquisition device. Examples are E/M Series data acquisition devices
DAQ D*/A
the data acquisition device data/address line signal used to indicate whether
the SER DAT IN pulse train transmitted to the SCXI chassis contains data
or address information
device
a plug-in data acquisition device, module, card, or pad that can contain
multiple channels and conversion devices. SCXI modules are distinct from
devices, with the exception of the SCXI-1200, which is a hybrid.
