National Instruments SCXI-1126, Руководство пользователя

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Glossary
© National Instruments Corporation G-3 SCXI-1126 User Manual
CHSGND chassis ground
CLKOUTEN scan clock output enable bit
CMV common-mode voltage
common-mode range the input range over which a circuit can handle a common-mode signal
common-mode signal the mathematical average voltage, relative to the ground of the computer,
of the signals from a differential input
D
D/A digital-to-analog
DAC D/A converter—an electronic device, often an integrated circuit, that
converts a digital number into a corresponding analog voltage or current
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
DAQD*/A the data acquisition device data/address line signal used to indicate whether
the SERDATIN pulse train transmitted to the SCXI chassis contains data or
address information
dB decibel—the unit for expressing a logarithmic measure of the ratio of two
signal levels: dB=20log
10
V1/V2, for signals in volts
DC direct current
DC coupled allowing the transmission of both AC and DC signals
default setting a default parameter value recorded in the driver. In many cases, the default
input of a control is a certain value (often 0) that means
use the current
default setting .
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.
digital trigger a TTL level signal having two discrete levels—a high and a low level
DIGGND digital ground signal
DIN Deutsche Industrie Norme