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BD3MH:[表情] 5楼使用中。 (2014-01-09 09:41)
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BG0APD:设接收信号为f,本振为50MHz,则混频信号有50-nf 和50+nf,n=1,2,3,,,,虽然电视棒频率所限,50-nf 不起作用,但50+nf 的多次谐波是无法消除的。好在便宜,可以玩玩。有点乐趣。[表情] [表情] (2014-01-09 21:32)
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bg7sq:[表情] 高手出套件吧,这样很方便 (2014-02-14 08:38)
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