Primary AC Voltage Standard Calibration of Audio Source

“该项目的动机是为是德科技音频源和分析仪的关键性能参数建立可追溯性，以符合国家标准。挑战在于提供三个相关参数的可追溯性：绝对振幅精度；在音频范围内的幅度平坦度；而测量的保真度要求，体现在动态范围和精度上。在这个市场中，区分不同产品所需的准确度通常小于1%。由于非常低水平的失真存在于音频源，它是固有的难以建立一个完全可追溯的测量总谐波失真。该项目的重点是提供一系列可追溯的评估，当根据英国的主要标准进行校准时，这些评估将增加新客户对这些仪器绝对性能的信心。这将代表这些产品可以测试的方式的一个步骤变化，以及在准确性水平上建立一个步骤变化。再加上可独立验证和可追溯的THD水平，将增加对该产品范围的信心，从而导致更多的销售。

"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.