down-conversion

例句：

1. 1. In the down-conversion process, the signal is first amplified and then compressed.
   在向下转换过程中，信号首先被放大然后被压缩。
2. 2. The down-conversion process is crucial for maintaining the stability of the system.
   向下转换过程对于保持系统的稳定性至关重要。
3. 3. Down-conversion techniques are used in many applications, such as telecommunications and radar systems.
   许多应用中都使用到了向下转换技术，如电信和雷达系统。