音频传输测试仪输出电平准确度校准

Calibration of output level accuracy in voice transmission Tester

介绍一种使用有效值数字交流电压表、匹配电阻箱、频谱分析仪来校准音频传输测试仪输出电平准确度的方法,并给出了测量结果不确定度。经过对数百台音频传输测试仪的校准,证明方法可行。在缺乏相应仪器设备的前提下,利用实验室常用设备,实现了音频传输测试仪的校准。

Anew calibration approach for output level for voice transmission tester is introduced in this paper; the standard instruments such as RMS AC voltmeter, Resistance box, spectrum analyzer should be used in this calibration approach, the uncertainty of the calibration result is given in this paper too. This new approach has been proved to be feasible after calibrating several hundred voice transmission testers. And in the absence of relevant equipments, using commonly used equipments in laboratory, realized the calibration of voice transmission tester.