https://devzone.nordicsemi.com/f/nordic-q-a/86874/the-sensitivityAt a rate of 1M, the receiving sensitivity of the Bluetooth chip was tested, and during the test, it was found that the sensitivity may decrease whenever the frequency point of the test is 2416, 2432, 2448, 2464 and 2480. As can be seen from the figureen-USTelligent Community 13Tue, 19 Apr 2022 01:09:01 GMThttps://devzone.nordicsemi.com/thread/363404?ContentTypeID=1Tue, 19 Apr 2022 01:09:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1689e4b4-446d-487d-bfc2-278a01a6ccd4ardenr<p>Hi，</p> <p><span>Please help to reply on this private case, thank you.</span></p> <p><span>Best regards,</span></p> <p><span>wu</span></p> <p><a href="https://devzone.nordicsemi.com/support/287585">Nordic DevZone (nordicsemi.com)</a></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/363029?ContentTypeID=1Tue, 12 Apr 2022 13:03:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:43867840-e93e-46b4-87d7-0eec11eb0a92Bendik Heiskel<p>Hi,</p> <p>This may be harmonics from the 32MHz system clock causing this. If placement of the 32MHz crystal is not optimal and there is poor grounding around the crystal this loss of RX sensitivity may occur.&nbsp; For a design review you can create a private case and upload the schematic and layout.</p> <p>&nbsp;</p> <p>Best regards,</p> <p>Bendik</p><div style="clear:both;"></div>