Справочник Пользователя для National Instruments NI PCI-6111
Glossary
G-4
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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
circuit, that converts a digital number into a corresponding analog
voltage or current
DAC0OUT
analog channel 0 voltage output signal
DAC1OUT
analog channel 1 voltage output signal
DAQ
data acquisition—a system that uses the computer to collect, receive,
and generate electrical signals
and generate electrical signals
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
integrated circuit (ASIC) for the system timing requirements of a
general A/D and D/A system
dB
decibel—the unit for expressing a logarithmic measure of the ratio of
two signal levels: dB = 20log10 V1/V2, for signals in volts
two signal levels: dB = 20log10 V1/V2, for signals in volts
DC
direct current
DGND
digital ground signal
DI
digital input
DIFF
differential mode
DIO
digital input/output
DIP
dual inline package
dithering
the addition of Gaussian noise to an analog input signal
DMA
direct memory access—a method by which data can be transferred
to/from computer memory from/to a device or memory on the bus while
the processor does something else. DMA is the fastest method of
transferring data to/from computer memory.
to/from computer memory from/to a device or memory on the bus while
the processor does something else. DMA is the fastest method of
transferring data to/from computer memory.
DNL
differential nonlinearity—a measure in least significant bit of the
worst-case deviation of code widths from their ideal value of 1 LSB
worst-case deviation of code widths from their ideal value of 1 LSB
DO
digital output