Glossary
NI5102 User Manual G-16 ni.com
Rpprobe resistance
RSE referencedsingle-ended m ode—all measurements are made with respect
to a common reference measurement system or a ground. Also called a
grounded measurement system
RTSIbus real-time system integration bus—the NI timing busth atco nnects DAQ
devicesdirectly, by means of connectors on top of the boards, for precise
synchronization of functions
S
s seconds
S samples
S/H sample-and-hold—acircuit that acquires and stores an analog voltage on a
capacitorfor a short period of time
S/s samplesper second—used to express the rate at which a DAQ device
samples an analog signal
sample counter the clock that counts the output of the channel clock, in other words, the
number of samples taken. On boards with simultaneous sampling, this
counter counts the output of the scan clock and hence the number of scans
samplerate the ratea tw hich a signal is sampled and digitized byan ADC
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.
Forexample, one pulse from the scan clock produces one scan which
acquires one newsample from every analog input channel in the group
scanclock theclock controlling the time interval between scans. On boards with
intervalscanning su pport (for example, the AT-MIO-16F-5),this clock
gatesthe channel clock on and off. On boards with simultaneous
sampling (for example, the EISA-A2000), this clock clocks the
track-and-hold circuitry
SCANCLK scan clocks ignal
scanrate the number of scans per second. For example,a scan rate of 10 Hz means
sampling each channel10 times per second