XH3596系列频稳测试仪校准方法研究

Research on the Calibration Method for XH3596 Series of Frequency Stability Tester

介绍了无倍增输出端的XH3596系列频稳测试仪的校准方法,通过对XH3596系列频稳测试仪的内部结构和工作原理分析,运用其内部的计数单元替代外接的计数器,在输入端口预置被测信号和参考信号的频差值,将频稳测试仪测得值与预置值进行比较,解决了XH3596系列频稳测试仪计量特性的校准问题,并给出了灵敏度和最大允许频差校准项目的测量不确定度评定。此校准方法的提出填补了国家计量检定规程和校准规范的空白,也为其它原理相似的频标比对器的校准提供了借鉴。

A calibration method of XH3596 series of frequency stability tester without doubling out-put is introduced. By analyzing the structure and working principle of XH3596 series of frequency stabili-ty tester, using the internal counting unit instead of the external counter, presetting the frequency differ-ence of measured signal and reference signal from the input port, comparing with the numerical value and measured numerical value, the calibration problem of XH3596 series of frequency stability tester metro-logical characteristic has been solved. And the evaluation of uncertainty in measurement for sensitivity and maximum relative frequency difference have been given. Because of this paper, the gaps of Nation Regulation of Metrology Verification of P. R. C and Calibration Specification have been filled, and it also provides reference calibration for other the similar principle of frequency comparator.