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CC2640发射功率设置为最大,搜索到的距离还是很短

Other Parts Discussed in Thread: LAUNCHXL-CC2640R2, CC2650, CC2640

以SimpleBLEPeripheral工程为例,设置HCI_EXT_TX_POWER_5_DBM,2~3外就没什么信号了-80~-90db的样子,这是怎么回事?