C-1
Appendix C
Glossary
adc (analog-to-digital converter)
A device or circuit that converts an analog voltage to digital signals.
absolute accuracy
Accuracy specifications that include the error contributions made by all equipment and
standards used to calibrate the instrument. Absolute accuracy is the number to compare
with the UUT for determining test specification ratio.
assert
To cause a digital signal line to go into a logic true state.
af (audio frequency)
The frequency range of human hearing; normally 15 Hz - 20,000 Hz.
artifact standard
An object that produces or embodies a physical quantity to be standardized, for example
a Fluke 732B dc Voltage Reference Standard.
base units
Units in the SI system that are dimensionally independent. All other units are derived
from base units. The only base unit in electricity is the ampere.
buffer
Refers to either an area of digital memory for temporary storage of data, or an amplifier
stage before the final amplifier.
burden voltage
The maximum sustainable voltage across the terminals of a load.
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