User manual

Glossary
NI 6034E/6035E/6036E User Manual G-4 ni.com
DC direct current
DGND digital ground signal
DIFF differential mode
differential input an analog input consisting of two terminals, both of which are isolated from
computer ground, whose difference is measured
DIO digital input/output
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.
DNL differential nonlinearity—a measure in least significant bit of the
worst-case deviation of code widths from their ideal value of 1 LSB
DO digital output
driver software that controls a specific hardware device such as a DAQ device or
a GPIB interface board
E
EEPROM electrically erasable programmable read-only memory—ROM that can be
erased with an electrical signal and reprogrammed
EXTSTROBE external strobe signal
UM.book Page 4 Monday, May 14, 2001 10:32 AM