CAJ | 학술논문

根据调幅广播发射机载波振幅变化指标的定义，通过对调幅信号的频谱进行分析，提出了一种对调幅发射机载波振幅变化指标的测试方法。该方法不再需要用量热法测量功率，只需用频谱分析仪测量载波电平的变化，通过简单计算即可得到载波振幅变化。利用GUM方法对测量不确定度进行了分析，介绍了评定测量不确定度的步骤和一般流程，分析了此测量方法的不确定度来源，并按照实际测试环境对不确定度进行了评估，对在不确定度评估中需要注意的几个问题进行了说明。
근거조폭엄파발사궤재파진폭변화지표적정의，통과대조폭신호적빈보진행분석，제출료일충대조폭발사궤재파진폭변화지표적측시방법。해방법불재수요용량열법측량공솔，지수용빈보분석의측량재파전평적변화，통과간단계산즉가득도재파진폭변화。이용GUM방법대측량불학정도진행료분석，개소료평정측량불학정도적보취화일반류정，분석료차측량방법적불학정도래원，병안조실제측시배경대불학정도진행료평고，대재불학정도평고중수요주의적궤개문제진행료설명。
Based on the definition of the carrier amplitude variation,this paper presents a test method for carrier amplitude variation of an amplitude?modulation broadcast transmitter according to the analysis on AM signal spectrum.In this method,the result can simply be derived from the carrier level variation read from the spectrum analyzer instead of measuring power in calorimetric method.Besides, this paper analyzes the uncertainty of the test method by GUM,consisting of the following parts: first of all,the general processes of assessing the uncertainty of measurement are introduced;secondly, the uncertainty sources of the method are analyzed and then the uncertainty is evaluated under the test environment;finally,several points for attention during the uncertainty evaluation are illustrated.