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what ‘s the lower threshold and the upper threshold of the Golden Receive Power Range?

user4527828
Intellectual 390 points

For the HCI_Read_RSSI command in bluetooth core protocol 4.1 , TI chip always returns the difference between the measured Received Signal strength indication and the limits of the golden Receive Power Range.

Could you tell me what ‘s the lower threshold and the upper threshold of the Golden Receive Power Range?  

 

  • 0
    TI__Guru* 85400 points
    Hi,

    The command follows the BT Spec. Please see the spec for more details

    ***
    Any positive RSSI value returned by the Controller indicates how many dB the RSSI is above the upper limit, any negative value indicates how many dB the RSSI is below the lower limit. The value zero indicates that the RSSI is inside the Golden Receive Power Range.


    The RSSI measurement compares the received signal power with two threshold levels, which define the Golden Receive Power Range. The lower threshold level corresponds to a received power between -56 dBm and 6 dB above the actual sensitivity of the receiver. The upper threshold level is 20 dB above the lower threshold level to an accuracy of +/- 6 dB.
    ***

    Please also take a look at the below command ( if you need the RSSI value without the Golden Range threshold):
    processors.wiki.ti.com/.../CC256x_VS_HCI_Commands

    Regards,
    Gigi Joseph.