difference frequency sweep

例句：

1. 1. The difference frequency sweep was used to detect the presence of interference in the signal.
   使用差异频率扫描来检测信号中的干扰。
2. 2. The engineers used a difference frequency sweep to analyze the data collected from the sensors.
   工程师们使用差异频率扫描来分析从传感器收集的数据。
3. 3. The difference frequency sweep helped us to identify the specific frequencies that were causing the noisein the system.
   差异频率扫描帮助我们识别出导致系统噪声的具体频率。