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Glossary
© National Instruments Corporation G-3 PCI-1200 User Manual
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
DAC OUTPUT
UPDATE
DAC output update signal
DAC0OUT, DAC1OUT digital-to-analog converter 0, 1 output signals
DACWRT DAC write signal
DAQ data acquisition—a system that uses the computer to collect, receive, and
generate electrical signals
DATA data lines at the specified port signal
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
DGND digital ground signal
DI digital input
DIFF differential
DIO digital input/output
DMA direct memory access
DNL differential nonlinearity
DO digital output
E
EEPROM electrically erasable programmable read-only memory—ROM that can be
erased with an electrical signal and reprogrammed