https://devzone.nordicsemi.com/f/nordic-q-a/122577/cs-configuration---issues-with-movementHi, when I am trying to set up channel sounding, I am looking for the best parameters for CS configuration. The main problem I have is that even with slow movement (1 km/h) and at a maximum distance of 6 meters, many procedures do not finish successfullyen-USTelligent Community 13Mon, 30 Jun 2025 14:31:53 GMThttps://devzone.nordicsemi.com/thread/540904?ContentTypeID=1Mon, 30 Jun 2025 14:31:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c7f59704-acb2-4374-9994-e61fe074c566Amanda Hsieh<p>Hi,&nbsp;</p> <p>CS relies on new features of the radio (PHY), features of the controller, security measures, and measurement procedures needed to collect raw data.&nbsp;The conversion of raw data into the resulting distance using dedicated algorithms is performed at the application level and is outside the scope of the Bluetooth specification.&nbsp;</p> <p><span>The default sample was designed to validate the data flow only, and it&#39;s&nbsp;</span>not robust against movement or multipath.&nbsp;Parameter tuning can help, but may not fully resolve issues with movement or reflections.<span>&nbsp;See my colleague&#39;s suggestion in <a href="https://devzone.nordicsemi.com/f/nordic-q-a/122436/channel-sounding-result-quality-in-ncs/540317">this post</a>.&nbsp;</span>Hardware quality and antenna design are important factors.&nbsp;<span>If possible, test with Nordic DKs to rule out hardware issues.&nbsp;</span></p> <p><span>Regards,<br />Amanda H.</span></p><div style="clear:both;"></div>