https://devzone.nordicsemi.com/f/nordic-q-a/12075/scanner-performance-test-feedbackHi. I&#39;m currently trying to scan beacons with timeslot example. However, I found that there&#39;re more than 20% of loss while scanning beacons broadcast. I think that&#39;s huge even if broadcast has no guarantee to be transferred. I set up 1 beaconen-USTelligent Community 13Tue, 23 Feb 2016 13:05:45 GMThttps://devzone.nordicsemi.com/thread/45697?ContentTypeID=1Tue, 23 Feb 2016 13:05:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fb947b93-e110-4a24-a83b-713903d9ccd7Ole Bauck<p>I cannot see any code, but I would guess it is correct. Unfortunately packet loss will happen. In your case it looks like it is because interference. Interference could be from your mobile, wifi router, wireless mouse etc, as many wireless items use the 2.4 GHz band.</p> <p>You can go to a place where you know there are less interference and place the beacon and scanner close to each other. See if the result is different.</p> <p>You can try with multiple scanners and see if they miss the same advertisement packets.</p> <p>You can use DTM to test the channels, see <a href="http://www.nordicsemi.com/eng/nordic/download_resource/20649/8/90056875">application note</a> and <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v11.0.0/ble_sdk_app_dtm_serial.html?cp=4_0_0_4_3">DTM example</a> in SDK.</p><div style="clear:both;"></div>