power spectrum analyzer

例句：

1. 1. The power spectrumanalyzer was used to measure the frequency distribution of the signal.
   功率谱分析仪被用来测量信号的频率分布。
2. 2. The power spectrum analyzer helped us identify the main components of the signal.
   功率谱分析仪帮助我们识别了信号的主要组成部分。
3. 3. The power spectrum analyzer revealed that there were multiple frequencies present in the signal.
   功率谱分析仪显示信号中存在多个频率。