在对网络分析仪的测量误差来源进行分析的基础上，介绍了误差的主要校准方法，同时给出了二端口校正的误差模型。
Based on analyzing the sources of measurement errors, the correction methods of the errors are introduced and error models of two port calibration are provided.
针对测量仪器校准间隔的优化问题，分析了历史校准数据的特征，建立了等维新息马尔可夫GM（1，1）预测模型。
To optimize the calibration interval of a measuring instrument, a prediction method based on the renewal GM(1,1) model is put forward.
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