Glossary
NI 5102 User Manual G-6 ni.com
DC coupled allowing the transmission of both AC and DC signals
default setting a default parameter value recorded in the driver. In many cases, the default
input of a control is a certain value (often 0) that means use the current
default setting. For example, the default input for a parameter may be do
not change current setting, and the default setting may be no AMUX-64T
boards. If you do change the value of such a parameter, the new value
becomes the new setting. You can set default settings for some parameters
in the configuration utility or manually using switches located on the device
device a plug-in DAQ device, card, or pad that can contain multiple channels and
conversion devices. Plug-in boards, PCMCIA cards, and devices such as
the DAQPad-1200, which connects to your computer parallel port, are all
examples of DAQ devices. SCXI modules are distinct from devices, with
the exception of the SCXI-1200, which is a hybrid
DIFF differential mode
differential input an analog input consisting of two terminals, both of which areisolated from
computer ground, whose difference is measured
differential
measurement system
a way you can configure your device to read signals, in which you do not
need to connect either input to a fixed reference, such as the earth or a
building ground
digital port see port
digital trigger a TTL level signal having two discrete levels—a high and a low level
DIN Deutsche Industrie Norme
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
DNL differential nonlinearity—a measure in LSB of the worst-case deviation of
code widths from their ideal value of 1 LSB
