Programming instructions

Glossary
LabVIEW Data Acquisition Basics Manual G-6
© National Instruments Corporation
dithering The addition of Gaussian noise to an analog input signal. By applying
dithering and then averaging the input data, you can effectively increase the
resolution by another one-half bit.
DLL Dynamic Link Library.
DMA Direct Memory Access. A method by which data you can transfer data to
computer memory from a device or memory on the bus (or from computer
memory to a device) while the processor does something else. DMA is the
fastest method of transferring data to or from computer memory.
down counter Performing frequency division on an internal signal.
driver Software that controls a specific hardware device, such as a data acquisition
board.
DSP Digital Signal Processing.
E
E-series MIO board Boards, such as the PCI-MIO-16E-1 and the AT-MIO-16E-2 which use
the MITE chip (on PCI boards for bus mastering), the DAQ-PnP chip for
Plug and Play configuration, the DAQ-STC chip for instrumentation class
counting and timing, and the NI-PGIA for high accuracy analog input
measurements.
EEPROM Electrically erased programmable read-only memory. Read-only memory
that you can erase with an electrical signal and reprogram.
EISA Extended Industry Standard Architecture.
event The condition or state of an analog or digital signal.
external trigger A voltage pulse from an external source that triggers an event such as
A/D conversion.
F
FIFO A first-in-first-out memory buffer. In a FIFO, the first data stored is the first
data sent to the acceptor.
filtering A type of signal conditioning that allows you to filter unwanted signals
from the signal you are trying to measure.