The FCC (Federal Communications Commission) sets spectral masks or adjacent-channel-power-ratio requirements on some services, such as land mobile radio.
FCC(美国联邦通信委员会)规定一些设备上，如地面移动无线电，频谱遮罩或邻近信道功率比的需求。
The FCC (Federal Communications Commission) sets spectral masks or adjacent-channel-power-ratio requirements on some services, such as land mobile radio.
FCC(美国联邦通信委员会)规定一些设备上，如地面移动无线电，频谱遮罩或邻近信道功率比的需求。
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