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Q斯坦利(Stanley,WA6LVC)在重回业余等级后被两种不同的FM制式弄糊涂了,制造商们把FM分成了窄的(NFM)和宽的(WFM)。他想知道为什么电台默认都采用WFM,因为NFM明明应该效率更高。是不是有什么要求限制?我们是否应该全面使用NFM来节约带宽?A在超高频波段上的业余FM与市政和公共的服务波段所使用的超高频FM非常接近。虽然在20世纪50
Q. Stanley (WA6LVC) was confused by two different FM formats after returning to the amateur level, with manufacturers categorizing FMs as NFM and WFM. He wondered why stations use WFM by default because NFM should obviously be more efficient. Is there any requirement to limit? Should we use NFM fully to save bandwidth? A Amateur FM in the UHF band is very close to UHF FM used in municipal and public service bands. Although in the 20th century 50