我用CC254X进行通讯，用手机的LightBlue进行连接测试，功率用两种模式，库默认的0dbm和在SBP_START_DEVICE_EVT事件下设置4dbm（HCI_EXT_SetTxPowerCmd(LL_EXT_TX_POWER_4_DBM);），两种模式下，手机离板子1米左右，手机接收信号就在-60，-70左右了，而且两种功率下通讯距离都差不多在6米左右，这种现象正常吗？
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