frequency spectrum designation

例句：

1. 1.The frequency spectrum designation is crucial for the accurate measurement of radio waves.
   频率谱指定对于准确测量无线电波至关重要。
2. 2. The engineer used a special software to designate the frequency spectrum for optimal performance.
   工程师使用特殊软件来指定频率谱，以获得最佳性能。
3. 3.In this study, we will analyze the frequency spectrum designation and its impact on communication systems.
   在本研究中，我们将分析频率谱指定及其对通信系统的影响。