National Instruments 653X User Manual page 133

pretrigger
propagation delay
protocol
PXI
R
real time
REQ
RGND
RT Series DAQ Device
RTSI bus
S
s
S
S/s
sample
© National Instruments Corporation
acquiring data that occurs before a trigger
the amount of time required for a signal to pass through a circuit
the exact sequence of bits, characters and control codes used to transfer data
between computers and peripherals through a communications channel,
such as the GPIB
PCI eXtensions for Instrumentation—a rugged, open system for modular
instrumentation based on CompactPCI, with special mechanical, electrical,
and software features
a property of an event or system in which data is processed as it is acquired
instead of being accumulated and processed at a later time
Request—Handshaking signal generated by the peripheral device,
indicating it is ready. In some transfer modes, the 653X device can
internally generate a REQ signal. The REQ signal with a bar above the
name indicates it is an inverted request signal.
reserved ground
A collection of one, two, or four ports and an associated timing controller.
All handshaking I/O, pattern I/O and buffered operations must be
performed on groups.
Real-Time System Integration Bus—the National Instruments timing bus
that connects DAQ devices directly, by means of connectors on top of the
devices, for precise synchronization of functions
seconds
samples
Samples per second—used to express the rate at which a DAQ device
samples an analog signal
an instantaneous measurement of a signal, normally using an
analog-to-digital convertor in a DAQ device
G-7
Glossary
653X User Manual