National Instruments DAQCard-6715, Руководство пользователя

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Glossary
© National Instruments Corporation G-3 Analog Output Series User Manual
correlated DIO A feature that allows you to clock digital I/O on the same clock as analog
I/O.
counter/timer A circuit that counts external pulses or clock pulses (timing).
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.
DAQ See data acquisition (DAQ).
DAQ device A device that acquires or generates data and can contain multiple channels
and conversion devices. DAQ devices include plug-in devices, PCMCIA
cards, and DAQPad devices, which connect to a computer USB or 1394
(FireWire
®
) port. SCXI modules are considered DAQ devices.
DAQ-STC Data acquisition system timing controller—an application-specific
integrated circuit (ASIC) for the system timing requirements of a general
A/D and D/A system.
data acquisition
(DAQ) 1. Acquiring and measuring analog or digital electrical signals from
sensors, transducers, and test probes or fixtures.
2. Generating analog or digital 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—although the term speaks of current, many different types
of DC measurements are made, including DC Voltage, DC current, and DC
power.
device 1. An instrument or controller you can access as a single entity that controls
or monitors real-world I/O points. A device often is connected to a host
computer through some type of communication network.
2. See also DAQ device and measurement device .
DIO Digital input/output.