phase in-lock造句

• In this paper , the author comprehensively expatiates the research on microwave phase in - lock frequency modulation . at first , the background of reentry telemetry system and the features of pcm telemetry system are presented , and then the author mainly discusses the application of phase in - lock fm techniques in the design of pcm transmitter and the analysis of characteristics of binary pcm reentry telemetry channel
  在文章的前面，作者简单介绍了目前再入遥测技术发展现状和pcm系统的特点；然后给出了二元pcm再入遥测信道的系统分析和高码速率数据传输实现的主要途径；在文章的第三部分，讨论了锁相调频技术及其在pcm遥测发射机中的实际应用。