field-synchronizing impulse

例句：

1. 1. The fieldsynchronization pulse was used to synchronize the communication systems.
   同步脉冲用于同步通信系统。
2. 2. The field synchronization pulse was transmitted over a long distance using radio waves.
   通过无线电波，同步脉冲被传输了很长的距离。
3. 3. The field synchronization pulse was used to detect the presence of a signal in the field.
   同步脉冲被用来检测场中信号的存在。