National Instruments NI 5911 User Manual

Page 35

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Glossary

NI 5911 User Manual

G-2

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AC coupled

the passing of a signal through a filter network that removes the
DC component of the signal

ADC

analog-to-digital converter—an electronic device, often an integrated
circuit, that converts an analog voltage to a digital number

ADC resolution

the resolution of the ADC, which is measured in bits. An ADC with16 bits
has a higher resolution, and thus a higher degree of accuracy, than a 12-bit
ADC.

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

attenuate

to reduce in magnitude

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

buffer

temporary storage for acquired or generated data (software)

bus

the group of conductors that interconnect individual circuitry in a computer.
Typically, a bus is the expansion vehicle to which I/O or other devices are
connected. Examples of PC buses are the PCI and ISA bus.

C

C

Celsius

channel

pin or wire lead to which you apply or from which you read the analog or
digital signal

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