National Instruments pxi ni 5401 Manuel D’Utilisation
Glossary
©
National Instruments Corporation
G-3
DC
direct current
DC coupled
allowing the transmission of both AC and DC signals
DDS
direct digital synthesis—a digital technique of frequency generation using
a numerically controlled oscillator (NCO), a dedicated lookup memory,
and a DAC
a numerically controlled oscillator (NCO), a dedicated lookup memory,
and a DAC
DDS mode
a method of waveform generation that uses built-in DDS functionality to
generate very high frequency resolution standard waveforms
generate very high frequency resolution standard waveforms
DGND
digital ground signal
digital word
See word.
driver
software that controls a specific hardware device
dynamic range
the ratio of the largest signal level a circuit can handle to the smallest signal
level it can handle (usually taken to be the noise level), normally expressed
in dB
level it can handle (usually taken to be the noise level), normally expressed
in dB
E
EEPROM
electrically erasable programmable read-only memory—ROM that can be
erased with an electrical signal and reprogrammed
erased with an electrical signal and reprogrammed
external trigger
a voltage pulse from an external source that triggers an event such as A/D
conversion
conversion
EXT_TRIG
external trigger input signal