https://devzone.nordicsemi.com/f/nordic-q-a/127349/commands-to-set-rf-testDear Nordic, I got some AT commands here &lt;https://docs.nordicsemi.com/bundle/ref_at_commands_nrf91x1/page/REF/at_commands/production_test/xrftest_tx_set.html&gt; to know that AT %XRFTEST=&lt;test&gt;,&lt;operation&gt;[,&lt;param0&gt;,&lt;param1&gt;,&lt;param2&gt;], this set commanden-USTelligent Community 13Tue, 10 Mar 2026 09:31:49 GMThttps://devzone.nordicsemi.com/thread/562895?ContentTypeID=1Tue, 10 Mar 2026 09:31:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c7cdb50d-47bf-4a33-b80a-4ffbd7ddd2dbSimon D-M<p>Hi,</p> [quote user=""]This command is to let the Dev Kit transmit the RF signal, and the signal is modulation signal, right?[/quote] <p>The signal sent by this command in the normal modem firmware is a Carrier Wave signal (<a href="https://docs.nordicsemi.com/bundle/ref_at_commands_nrf91x1/page/REF/at_commands/production_test/nrf91x1_production_test.html#:~:text=The%20command%20enables%20the%20RF%20transmitter%20in%20stand%2Dalone%20mode%20and%20transmits%20a%20CW%20signal%20on%20the%20given%20RF%20frequency%20without%20frequency%20offset">link</a>). I don&#39;t think there should be any modulation while transmitting with that command.</p> [quote user=""]may I know if there is some other commands which can let the Dev Kit transmit out Continuous Sine Wave signal and receive CSW signal?[/quote] <p><a href="https://docs.nordicsemi.com/bundle/ref_at_commands_nrf91x1/page/REF/at_commands/production_test/nrf91x1_production_test.html">%XRFTEST</a> in the normal modem firmware has very few parameters because it was made as an easy-to-use command. If you need more parameters you can always use the <a href="https://www.nordicsemi.com/Products/nRF9151/Download?lang=en#infotabs:~:text=Production%20Test%20Image">PTI modem firmware</a> which has a more complete <a href="https://docs.nordicsemi.com/bundle/ref_at_commands_pti/page/REF/at_commands/production_test/xrftest_tx_set.html">%XRFTEST</a> command with a lot more parameters.</p> <p>I hope I was able to help you.</p> <p>Best regards,</p> <p>Simon D-M</p><div style="clear:both;"></div>