單項(xiàng)選擇題有線電視和衛(wèi)星電視接收系統(tǒng)的接收天線接收VHF 信號(hào)旱,應(yīng)采用頻道天線,其頻帶度應(yīng)為下列哪項(xiàng)數(shù)值?()

A.4MHz
B.8MHz
C.16MHz
D.20MHz