天气预报 > 其他 > 电视信号波长是多少
电视信号波长是多少
更新时间: 2020-09-28 00:00:00  

有线电视的信号波长是1550纳米,数字电视的信号波长是1310纳米。

无线电波是指在自由空间内通过天线进行发射和吸收传播的射频频段的电磁波。无线电波的波长越短,对应频率越高,相同时间内传输的信息就越多。

关键词: 电视 信号 波长 多少

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