National Instruments SCXI -1125 用户手册

ppm

parts per million

PXI

A rugged, open system for modular instrumentation based on CompactPCI, 
with special mechanical, electrical, and software features. The PXIbus 
standard was originally developed by National Instruments in 1997, and is 
now managed by the PXIbus Systems Alliance.

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.

RMA

return Material Authorization

rms

root mean square

RSVD

reserved bit/signal

RTI

referred to input—Calculates a specification relative to the input range.

s

seconds

sample

An instantaneous measurement of a signal, normally using an 
analog-to-digital converter in an E Series DAQ device.

sample rate

The number of samples a system takes over a given time period, usually 
expressed in samples per second.

scan

One or more analog or digital input samples. Typically, the number of input 
samples in a scan is equal to the number of channels in the input group. For 
example, one pulse from the scan clock produces one scan which acquires 
one new sample from every analog input channel in the group.

SCANCLK

Scan clock signal used to increment the next channel after each E Series 
DAQ device analog-to-digital conversion.