National Instruments PCI-1200 User Manual
Page 87
Glossary
© National Instruments Corporation
G-3
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