型分支结构 meaning in Chinese

y-branched structure

Upstream channels cover in 5 65mhz , which is a part of the bandwidth of high frequency （ hf ） and very high frequency （ vhf ） . it is liable to incur noises ingress onto the band . since hfc system has the tree - and - branch topology between the fiber - node and subscriber units , subscriber units belonging to one fiber - node share the same upstream channel , forming the " noise funneling " effect
上行频带位于5 - 65mhz之间，这一频带为高频（ hf ）和甚高频（ vhf ）的一部分，此频带易受噪声干扰；此外，由于从光节点到用户端为树型分支结构，同一光节点的多个用户共享同一信道，形成了漏斗效应。