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1.Units: megahertz (MHz) AM (amplitude modulation), 200 and up are for military use, but are staffed by the same civil controllers.
单位：兆赫，调幅，200以上为军用，亦为民航管制员执勤。收藏指正
2.Bandwidth - The range within a band of wavelengths or frequencies, in cable typically measured in megahertz. Fully upgraded cable systems usually offer 750 MHz of bandwidth.
带宽-一束波长或频率的范围。有线电视用赫兹来衡量，当今最新的有线电视系统通常能提供750兆赫的带宽。收藏指正
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