parametric frequency converter

例句：

1. 1.The parametric frequency converter is used to adjust the frequency of a signal.
   参数频率转换器用于调整信号的频率。
2. 2.The parametric frequency converter was developed to improve the accuracy of measurements.
   参数频率转换器的开发旨在提高测量的准确性。
3. 3. The parametric frequency converter is widely used in various applications, including communication systems and radar technology.
   参数频率转换器在各种应用中都有广泛使用，包括通信系统和雷达技术。