https://devzone.nordicsemi.com/f/nordic-q-a/39471/nrf51422-dtm-rxWhen nrf51422 passed the authentication, when entering the rx mode of DTM, there was always a -59dbm launch at the 2.79GHz frequency point, what caused it, and how to eliminate the launch?en-USTelligent Community 13Mon, 15 Oct 2018 13:07:18 GMThttps://devzone.nordicsemi.com/thread/152891?ContentTypeID=1Mon, 15 Oct 2018 13:07:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9c1c61e8-4b77-48c3-983f-9925e5efb4f3Andreas<p>Hi,</p> <p>&nbsp;</p> <p>This is the LO leaking out and if the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf51/dita/nrf51/pdflinks/ref_layout.html?cp=3_6">reference layout </a>has been poorly replicated it can reach these levels. It can be reduced by tuning the matching network, though a larger layout difference most will often require more tuning, and often require sacrifice of some output power to reduce the spurious. We therefore recommend replicating the reference&nbsp;layout as closely as possible.</p> <p>&nbsp;</p> <p>Best regards,</p> <p>Andreas</p><div style="clear:both;"></div>