Glossary
©
National Instruments Corporation
G-5
NI PXI-6682 User Manual
PXI star
a special set of trigger lines in the PXI backplane for high-accuracy device
synchronization with minimal latencies on each PXI slot
PXI_Trig/PXI_Star
synchronization clock
the clock signal that is used to synchronize the PXI Triggers or PXI_STAR
triggers on an NI PXI-6682
PXI Trigger
the PXI timing bus that connects PXI devices directly, by means of
connectors on top of the devices, for precise synchronization of functions
S
s
seconds
skew
the actual time difference between two events that would ideally occur
simultaneously. Inter-channel skew is an example of the time differences
introduced by different characteristics of multiple channels. Skew can
occur between channels on one module, or between channels on separate
modules (intermodule skew).
slave
a computer or peripheral device controlled by another computer
slot
the place in the computer or chassis in which a card or module can be
installed
Slot 2
the second slot in a PXI system which can house a master timing unit
SMB
sub miniature type B—a small coaxial signal connector that features a snap
coupling for fast connection
synchronous
a property of an event that is synchronized to a reference clock
T
t
CtoQ
clock to output time
t
hold
hold time
t
pd
propagation delay time
TRIG
trigger signal
trigger
a digital signal that starts or times a hardware event (for example, starting
a data acquisition operation)
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