synchronous phase modifier

例句：

1. 1. The SPM is used to adjust the phase of the signal for precise timing.
   同步相调制器用于调整信号的相位，以实现精确的时间同步。
2. 2. In digital communication, the SPM is crucial for maintaining a stable data transfer rate.
   在数字通信中，同步相调制器对于保持稳定数据传输速率至关重要。
3. 3. The SPM has been widely applied in various fields such as satellite communication and radar systems.
   同步相调制器已在卫星通信和雷达系统等众多领域得到广泛应用。