vhf channel 中文意思是什麼

vhf channel 解釋
甚高頻頻道
  • vhf : vhf ＝ very high frequency 【無線電】甚高頻。
  • channel : n 1 水路，水道，渠，溝；海峽；河床，河底。2 （柱等的）槽，凹縫；【機械工程】槽鐵，凹形鐵。3 〈比...
  1. 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。
  2. Nowadays the major communicating mode of the ahts in china is the vhf relay channel ( vhf - rc )

    超短文自動測報系統的地理分佈性決定了無線通信在該系統中的復雜性和重要性。
分享友人
分享到 Line

分享到臉書