National Instruments PCI-4451 Manual de usuario descargar pdf (Pagina 103)

Glossary

National Instruments Corporation G-15 PCI-4451/4452 User Manual

real time 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

relative accuracy a measure in LSB of the linearity of an ADC. It includes all non-linearity

and quantization errors. It does not include offset and gain errors of the

circuitry feeding the ADC.

resolution the smallest signal increment that can be detected by a measurement

system. Resolution can be expressed in bits, in proportions, or in percent of

full scale. For example, a system has 12-bit resolution, one part in 4,096

resolution, and 0.0244% of full scale.

resource locking a technique whereby a device is signaled not to use its local memory while

the memory is in use from the bus

retry an acknowledge by a destination that signifies that the cycle did not

complete and should be repeated

ribbon cable a flat cable in which the conductors are side by side

rise time the difference in time between the 10% and 90% points of a system’s step

response

rms root mean square—the square root of the average value of the square of the

instantaneous signal amplitude; a measure of signal amplitude

ROM read-only memory

RSE See SE.

RTSI bus real-time system integration bus—the National Instruments timing bus that

connects DAQ boards directly, by means of connectors on top of the boards,

for precise synchronization of functions

s seconds

S samples

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National Instruments PCI-4451 Manual de usuario Pagina 103