NRF52840 Coded Phy Sensitivity with soft device 6.0.0-6.alpha

[Christian]

Hi,

although the NRF52840 has a nominal receiver sensitivity of -103 dbm I am only able to get a sensitivity of around -97 dbm. I know there was a bug in older soft device versions resulting in a decreased sensitivity, but I am using soft device 6.0.0-6.alpha in which this bug should be fixed. I used a modifiedatt_mtu_throughput example to print the RSSI when changed, but connection between two nrf52840 boards is still lost at around -97 dbm.

Is there anything else that needs to be considered apart from the soft device version?

Thanks in Advance

Christian

[Christian]

With the digital attenuator set to 0dB, the whole setup has an attenuation of 8db, I used a transmission power of 9dbm, but I was only able to set the attenuator to around 97 db until the connection of the boards dropped, and the output of the boards showed -96 dbm rssi which seems logical for this setup, but I was not able to reach the -103 dbm.

Thanks in Advance

Christian