National Instruments DAQ PCI E Series User Manual page 146

Glossary
t
sc
t
sp
TTL
U
UI
UISOURCE
unipolar
UPDATE
V
V
VDC
VI
V
IH
V
IL
V
in
V
m
V
OH
V
OL
V
ref
Vrms
PCI E Series User Manual
source clock period
source pulse width
transistor-transistor logic
update interval
update interval counter clock signal
a signal range that is always positive (for example, 0 to +10 V)
update signal
volts
volts direct current
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
volts, input high
volts, input low
volts in
measured voltage
volts, output high
volts, output low
reference voltage
volts, root mean square
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