National Instruments NI 5102 用户手册
Glossary
© National Instruments Corporation
G-19
U
unipolar
a signal range that is always positive (for example, 0 to +10 V)
update
the output equivalent of a scan. One or more analog or digital output
samples. Typically, the number of output samples in an update is equal to
the number of channels in the output group. For example, one pulse from
the update clock produces one update that sends one new sample to every
analog output channel in the group
samples. Typically, the number of output samples in an update is equal to
the number of channels in the output group. For example, one pulse from
the update clock produces one update that sends one new sample to every
analog output channel in the group
update rate
the number of output updates per second
V
V
volts
V
DC
volts direct current
VDMAD
virtual DMA driver
vertical sensitivity
describes the smallest input voltage change the digitizer can capture
VI
virtual instrument—(1) a combination of hardware and/or software
elements, typically used with a PC, that has the functionality of a classic
stand-alone instrument (2) a LabVIEW software module (VI), which
consists of a front panel user interface and a block diagram program
elements, typically used with a PC, that has the functionality of a classic
stand-alone instrument (2) a LabVIEW software module (VI), which
consists of a front panel user interface and a block diagram program
V
IH
volts, input high
V
IL
volts, input low
V
in
volts in
V
O
volts, output
V
OH
volts, output high
V
OL
volts, output low
V
pk-to-pk
the maximum signal voltage minus the minimum signal voltage. This
reflects the maximum change in signal voltage and affects the vertical
sensitivity or gain of the input amplifier
reflects the maximum change in signal voltage and affects the vertical
sensitivity or gain of the input amplifier
V
ref
reference voltage