These requirements govern the allowed spectrum of a transmission and vary according to the bandwidth of the channel and the frequency of transmission.
这些需求根据信道带宽和发射频率改变，控制允许发送的频谱。
These requirements govern the allowed spectrum of a transmission and vary according to the bandwidth of the channel and the frequency of transmission.
这些需求根据信道带宽和发射频率改变，控制允许发送的频谱。
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