subcarrier reference

例句：

1. 1.The subcarrier reference was used to tune the receiver.
   使用副载波参考来调谐接收器。
2. 2. The engineer found a subcarrier reference that matched the signal perfectly.
   工程师找到了一个与信号完美匹配的副载波参考。
3. 3. The subcarrier reference was crucial for maintaining accurate timing in the system.
   副载波参考对于保持系统中准确定时至关重要。