https://devzone.nordicsemi.com/f/nordic-q-a/78938/aoa-angle-of-arrival-between-nrf52833-and-nrf52811-frequency-deviationI am trying to create an AOA link sending a CTE from an nrf52811 (BM833A module) and the receiver with an nrf52833 (bl653 module). Analyzing the CTE detection data, the first 8 reference samples in 2M mode I have a phase error of 30&#186; on average over theen-USTelligent Community 13Thu, 26 Aug 2021 06:47:14 GMThttps://devzone.nordicsemi.com/thread/326646?ContentTypeID=1Thu, 26 Aug 2021 06:47:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2b368363-2f69-422d-bf12-8720f3326970Simonr<p>Hi</p> <p>I&#39;m not aware of any issue like this. First thing that comes to mind is that there is an issue with either of the crystal oscillators on your nRF52811 module. Does your nRF52811 module have the 32.768kHz crystal on board? If not, try enabling the RC oscillator (in prj.conf of your project).</p> <p>Are you using the sample projects in the nRFConnect SDK or a custom application? If you&#39;re using ours, have you made sure to build the application for the nRF52811 and not the nRF52833?</p> <p>Also, what central board are you using, an nRF52833 DK with an antenna array?</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>