Primary AC Voltage Standard Calibration of Audio Source

“该项目的动机是为是德音频源和分析仪的关键性能参数建立国家标准的可追溯性。挑战是为三个相关参数提供可追溯性：绝对振幅精度;音频范围内的振幅平坦度;以及反映在动态范围和准确度中的测量要求的保真度。在这个市场上区分产品所需的准确度通常小于1%。由于音频源中存在非常低的失真水平，因此很难建立一个完全可追溯的总谐波失真测量方法。该项目的重点是提供一系列可追溯的评估，以增加新客户对这些仪器绝对性能的信心，并根据英国的主要标准进行校准。这将代表这些产品的检测方式发生了阶跃变化，并在准确度水平上建立了阶跃变化。这与可独立验证和可追溯的THD水平相结合，将提高对该产品系列的信心，从而带来更多的销售。

"The motivation for this project is to establish traceability to national standards for the key performance parameters for the Keysight audio source and analyser.The challenge is to provide traceability for the three relevant parameters: absolute amplitude accuracy; amplitude flatness over the audio frequency range; and the fidelity of the measurement requirements, reflected in the dynamic range and accuracy. The accuracy needed to differentiate between products in this market is generally less than 1%. Due to the very low levels of distortion present in an audio source it is inherently difficult to establish a fully traceable measure of the total harmonic distortion.This project focuses on a providing a traceable series of assessments that would increase confidence of new customers in the absolute performance of these instruments, when calibrated against the UK's primary standards. This would represent a step change in the way in which these products can be tested as well as establishing a step change in the level of accuracy. This coupled with the independently verifiable, and traceable, levels of THD would enable increased confidence in this product range and would therefore lead to more sales.