搜索 - 科创网

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内容：我对射频基本是敬而远之的也没有在这方面有所投入不过最近要测几根lora用的天线 nanovna又不贵就买了下来既然不贵干脆就拆了看看芯片的国产化还是蛮高的主控是gd32f303 感觉像f103

内容：LK0267 [Q]某业余电台CW信号的片段为“by1cra test up 5”，意思是： [A]该台的呼号为BY1CRA，正在参加竞赛，接收频率从发射频率向上偏移5kHz 该台的呼号为BY1CRA，

内容：直采架构的优点是不用因硬件变频而需再引入si5351和模拟开关天线信号，经过LNA低噪放大，直接进入单片机的ADC引脚进行采样，ADC的采样率设置的是2.4M理论上讲可以接收1.2M以内的中波信号数字化的射频信号经,***这是我设计的LNA的电路图，为了简化低通网滤波，我直接用磁棒天线和可调电容调谐到一个固定的频率在LNA上我卡了很长一段时间，最初犯了一个低级而致命的错误，LNA放大倍数不够而导致无法采集到足够的射频信号,***************************************************************************************int2float是把数字射频信号映射到

约找到 1041 条结果，耗时 0.215 秒

文章分类：

注意事项：

当前账号的附件下载数量限制如下：