1,686
次編輯
變更
中频
,無編輯摘要
[[File:中 频频1.jpg|缩略图|[https://imagebaijiahao.baidu.com/search/details?ct=503316480&z=0&ipn=d&word=%E4%B8%AD%E9%A2%91&step_word=&hs=0&pn=93&spn=0&di=206030&pi=0&rnid=11704599948682223191&tnwfr=baiduimagedetailspider&isfor=0%2C0&istype=2&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=-1&cs=2772305966%2C1640346371&os=2958685045%2C758117066&simid=4139371599%2C598570637&adpicid=0&lpn=0&ln=1707&fr=&fmq=1631138547467_R&fm=result&ic=&s=undefined&hd=&latest=©right=&se=&sme=&tab=0&width=&height=&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=https%3A%2F%2Fgimg2.baidu.com%2Fimage_search%2Fsrc%3Dhttp%3A%2F%2Fimg.hqew.com%2Ffile%2Ftech2%2Fdoc%2F2010%2F0101%2F1201105091536365286.jpg%26refer%3Dhttp%3A%2F%2Fimg.hqew.com%26app%3D2002%26size%3Df9999%2C10000%26q%3Da80%26n%3D0%26g%3D0n%26fmt%3Djpeg%3Fsec%3D1633730780%26t%3D26b964b8d2efd0682ce1e1da4ae5c8ab&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3Bj4kj1_z%26e3BvvAzdH3Fip4sAzdH3F1twgzt3tfi7AzdH3Fj1wAzdH3Fda8bAzdH3FabacAzdH3Fdll80_z%26e3Bip4s&gsm=5f&rpstart=0&rpnum=0&islist=&querylist=&nojc=undefined pc 原图链接来自IT之家]]]
'''中频'''按频率的高低来划分时，中频（MF，Medium Frequency）是指，频段由300KHz 到3000KHz的频率，多数作AM电台。按其在电路中的位置与作用来划分时：IF中频(Intermediate Frequency)是指高频信号经过变频而获得的一种信号。
<ref>[https://zhidao.baidu.com/question/101953036.html 中频是一个什么概念? ]百度知道</ref>