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CC1200接收灵敏度太低,远远低于datasheet指标

Other Parts Discussed in Thread: CC1200

拿两块CC1200做通讯实验,两块板子用电缆线相连,中间加衰减器。用功率计验证过接收端功率,测得CC1200的接收灵敏度大约为-80dBm。而且发现在-80dbm环境下,CC1200状态显示RXFIFO-OVERFLOW溢出错误。

灵敏度远远低于datasheet的50kpbs下灵敏度-109dBm,经典配置38.4kbps下灵敏度-111dBm的指标。

我的CC1200主要参数:434MHz,2G-FSK,数据率15kbps,其余参数都是按照SMARTRF-STUDIDO导出配置的。硬件也是按照推荐电路设计。请教各位,接收灵敏度低有没有解决措施?datasheet上的指标是如何测得的?