摘要
根据可调衰减器所处位置的不同,把调制器分成两种类型,并通过具体分析,指出每种调制器的输出电平对载噪比的影响。
According to different positions of the adjustable attenuator, modulators may be classified into two gapers. Through concrete analyze, this paper points out the relation between C/N and each output level.
出处
《中国有线电视》
2007年第23期2188-2190,共3页
China Digital Cable TV
