采用电视行频辅助鉴相克服鉴频干扰

TV Line Frequency Assisting PD Method to Eliminate the Interference of PD Frequency

在采用频率合成器技术的电视发射机中,鉴相频率与电视行频不同步常常造成鉴频干扰画面的现象,讨论采用视频行同步脉冲作辅助鉴相的技术原理克服鉴频干扰的方法,简述异或门鉴相器的工作原理。

When adopting the TV transmitter with FS technology, there often appears a phenomenon that PD frequency interferes with the picture. This is due to the PD frequency being out of sync with the line frequency. This paper introduces the video line synchronizing pulse assisting PD method to eliminate the interference of PD frequency and briefly describes the theory of EXOR gate.