ingress noise 中文意思是什麼
ingress noise
解釋
有線電視網路雜訊-
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
上行頻帶位於5 - 65mhz之間,這一頻帶為高頻( hf )和甚高頻( vhf )的一部分,此頻帶易受噪聲干擾;此外,由於從光節點到用戶端為樹型分支結構,同一光節點的多個用戶共享同一通道,形成了漏斗效應。
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