National Instruments NI 5102 用户手册
Glossary
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
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
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 are isolated from
computer ground, whose difference is measured
computer ground, whose difference is measured
differential
measurement system
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
need to connect either input to a fixed reference, such as the earth or a
building ground
digital port
see
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
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
code widths from their ideal value of 1 LSB