IEEE 181-2011 pdf free.IEEE Standard for Transitions, Pulses,and Related Waveforms.
IEEE 181 defines terms pertaining to transitions, pulses, and related waveforms and defines procedures for estimating their parameters.
The purpose of the standard is to unambiguously and accurately define terms pertaining to transitions, pulses, and related waveforms and the algorithm for their computation. This helps to communicate requirements between vendors and users, improves understanding and readability of instrument performance specifications, and provides a common ground for parameter and performance comparisons.
2. Normative references
The following referenced documents are indispensable for the application of this document (i.e., they must be understood and used, so each referenced document is cited in text and its relationship to this document is explained). For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies.
For the purposes of this document, the following terms and definitions apply. The IEEE Standards Dictionary: Glossary of Terms & De/initions2 and ISO/IEC Guide 99:2007 should be referenced for terms not defined in this clause.
Along with the recommended terms and their definitions, a number of deprecated but widely used terms are listed in 3.3. The reasons for their deprecation arc noted after the definition of the recommended term. All defined terms are italicized in this document.
Throughout this standard, time is an independent variable, symbolized with the letter t. Wive/irm value is used to refer to the dependent variable, symbolized by r(t. For particular waveforms, wave/arm value will be synonymous with terms such as voltage, current, power. or some other quantity.
aberration region
aberration region, post-transition: The interval between a user-specified instant and a fixed insta,,!, where the fixed insra,,r is the first sampling instant succeeding the 50% reference level instant for which the corresponding wave/brm value is within the slate boundaries of the state succeeding the 50% reference level instant. The user-specified instant occurs after the fixed instant and is typically equal to the fixed instant plus three times the transition duration.
aberration region, pre-transition: The interval between a user-specified inslant and a fixed insla,it, where the fixed instant is the first sampling i,zsant preceding the 50% reference level instant for which the corresponding waveform value is within the state boundaries of the state preceding the 50% reftrence level install!. The user-specified instant occurs before the fixed install! and is typically equal to the fixed inswnt minus three times the transition duration.
accuracy: The closeness of agreement between the result of a measurement and the true value of the measurand.IEEE 181 pdf download.