https://devzone.nordicsemi.com/f/nordic-q-a/11971/sending-constant-carrierHi, I want to send a constant carrier during production testing of a product. First I call sd_softdevice_disable(); then I do the following: //Restart radio NRF_PPI-&gt;CHENCLR = PPI_CHENCLR_CH0_Msk | PPI_CHENCLR_CH1_Msk; NRF_RADIO-&gt;SHORTS = 0;en-USTelligent Community 13Fri, 19 Feb 2016 11:37:16 GMThttps://devzone.nordicsemi.com/thread/45326?ContentTypeID=1Fri, 19 Feb 2016 11:37:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3ee2ae17-63c0-4332-9ed6-38c764607ee1Einar Thorsrud<p>The <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v11.0.0/nrf_radio_test_example.html">radio test example</a> should be a good place to start. If you copy <code>radio_tx_carrier()</code> and <code>radio_disable()</code> from radio_test.c to your project, you can call <code>radio_tx_carrier()</code> after disabling the SoftDevice. I think that should be enough to output a unmodulated carrier, even if the radio has been configured previously.</p><div style="clear:both;"></div>