Glossary
BNC-2140 User Manual G-2
©
National Instruments Corporation
ACH analog input channel signal
A/D analog-to-digital
ADC analog-to-digital converter—an electronic device, often an integrated
circuit, that converts an analog voltage to a digital number
alias a false lower frequency component that appears in sampled data acquired
at too low a sampling rate
amplification a type of signal conditioning that improves accuracy in the resulting
digitized signal and reduces noise
amplitude flatness a measure of how close to constant the gain of a circuit remains over a range
of frequencies
AOGND analog output ground signal
attenuate to decrease the amplitude of a signal
attenuation ratio the factor by which a signal’s amplitude is decreased
B
b bit—one binary digit, either 0 or 1
B byte—eight related bits of data, an eight-bit binary number. Also used to
denote the amount of memory required to store one byte of data.
bandwidth the range of frequencies present in a signal, or the range of frequencies to
which a measuring device can respond
bipolar a signal range that includes both positive and negative values (for example,
–5 V to +5 V)
BNC a type of coaxial signal connector
UM.book Page 2 Tuesday, July 14, 1998 10:37 AM
