RE: The receiver of RF52840 RX Sensitivity

Andreas — Fri, 19 Jun 2020 09:36:56 GMT

Hi,

I am not familiar with this tester, but per the Bluetooth spec there is only a requirement that the DUT shall have a sensitivity of -70dBm or better. The tester might just test for this and not allow you to manually change the input power, but you can do this externally using attenuators.

Another possible solution is if there is a way to measure the BER or PER. Lower the input signal strengt (in the instrument or by attenuators) until the BER or PER is below the threshold limit.

You seem to have gotten it to work properly though. The sensitivity you measure is a bit worse than the spec, but your layout also differs quite a bit, which might be the cause. You should also make sure to measure in front of the matching network:

Best regards,

Andreas