Bluetooth radio tests gives 2.0GHz + channel*channelwidthhttps://devzone.nordicsemi.com/f/nordic-q-a/40644/bluetooth-radio-tests-gives-2-0ghz-channel-channelwidthWhen performing pre-qualifying Bluetooth radiotest of our hardware (utilizing the nRF52840-chip) at NEMCO, we experienced very strange behavior. The frequencies detected in the test-chamber was not in the range 2400MHz - 2480MHz as we would expected,en-USTelligent Community 13Mon, 19 Nov 2018 12:52:51 GMTRE: Bluetooth radio tests gives 2.0GHz + channel*channelwidthhttps://devzone.nordicsemi.com/thread/157954?ContentTypeID=1Mon, 19 Nov 2018 12:52:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:11874581-861a-4242-9587-b622d37775ceH&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>It looks like the external clock source is not turned on before running the carrier test, which means that the radio is sourced by the internal 64M RC oscillator.</p> <p>Could you ensure that the external HFCLK is running?</p> <p>NRF_CLOCK-&gt;TASKS_HFCLKSTART = 1;</p> <p>while (NRF_CLOCK-&gt;EVENTS_HFCLKSTARTED == 0);</p> <p></p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>