搜索 - 科创

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这个机子说起来也是21世纪的产品，看底板风格就能看出来。射频子板却一股1990年代日本对讲机风格，也是有意思。对于设计低成本高性能窄带接收机，该机很有参考意义，也比较适合DIY。主要是他用了多次变频方...

我这里在顶楼信号也一般，用那个天线，sdrplay1A做接收机，开FM滤波器，rg223电缆，只有过顶的时候信号强一点还能解码，仰角低一点就解不出。可能要到更空旷的地方或者加LNA和带通（本人知识少见...

除了上课应付实验，平常没机会接触示波器，不过我觉得一个适合玩儿的示波器diy应该是这样的：至少200M的采样，双通最大500M更好，这样每通道都能做到20M带宽；采样前端要有个合适的模拟前端，用几毛钱...

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