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我打开packet sniffer后，窗口下面的信道选择框不见了（如下图），之前一直是有的，不知道什么原因就不见了。重装软件，重启系统都试过了，但还是不行，麻烦TI的工程师帮忙解答一下！
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请点一下第四个按钮
