提出了一种二次群的分接器的实现方法。分析了二次群的帧结构,二次群分接的各个组成部分,包括帧头捕获、帧丢失告警、基群信号提取、去除插入码、负码速调整等二次群分接的关键技术。实现上述功能的VHDL语言的程序段。该设计在FPGA中实现简单,占用资源少,取得很好的应用效果。 A method of implementing quadratic group tap is proposed. This paper analyzes the frame structure of the quadratic group, the components of the quadratic group tap, including the key techniques of frame group header capture, frame loss alarm, group signal extraction, removal of the inserted code and negative code rate adjustment. . VHDL language to achieve the above functions of the program segment. The design in the FPGA to achieve simple, less resource consumption, and achieved good application results.