https://devzone.nordicsemi.com/f/nordic-q-a/51982/configuring-the-crystal-offset-frequency-for-ble-transmissionHi, sorry for if this has been answered elsewhere. I am currently designing the production setup for a product using the nrf52840 as a BLE radio. I can&#39;t find how the carrier frequency of the radio may be tuned in the documentation? Best regardsen-USTelligent Community 13Tue, 10 Sep 2019 14:13:30 GMThttps://devzone.nordicsemi.com/thread/208993?ContentTypeID=1Tue, 10 Sep 2019 14:13:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1520f4f0-0707-44a7-aa99-206ba7810786thbj_widex<p>Hi Einar</p> <p>Okay, we are also doing that. It&#39;s just not how we normally do with other Radio ICs</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/208991?ContentTypeID=1Tue, 10 Sep 2019 14:07:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dd397c1b-25c6-4ef6-ae3d-d4579482d0f3Einar Thorsrud<p>Hi Thomas,</p> <p>There is no way to tune the carrier frequency. You just have to use a 32 MHz crystal that is within the <a href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/clock.html?cp=3_0_0_4_3_3_1#unique_2065860453">specification for the HFXO</a>&nbsp;and make sure you use proper load caps, and this dictates the accuracy of the output RF signal. See <a href="https://devzone.nordicsemi.com/nordic/short-range-guides/b/hardware-and-layout/posts/general-pcb-design-guidelines-for-nrf52">General PCB design guidelines for nRF52 series</a>.</p><div style="clear:both;"></div>