https://devzone.nordicsemi.com/f/nordic-q-a/14221/bluetooth-kc-korea-certificationHello, I Preparing the KC (korea-certification. about bluetooth) KC requirements as follows: Set Test Modes Set Continuous modulation mode Set Unmodulated Continuous mode (single carrier) Set Hopping mode Set Receive mode Channelen-USTelligent Community 13Thu, 02 Jun 2016 08:41:58 GMThttps://devzone.nordicsemi.com/thread/54319?ContentTypeID=1Thu, 02 Jun 2016 08:41:58 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a3b4df2b-780b-44a0-85ab-15af1cd70213MartinBL<p>Hi,</p> <p>You are probably looking for our <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v11.0.0/ble_sdk_app_dtm_serial.html?cp=5_0_0_4_4">Direct Test Mode example</a>. It can be used to test the operation of the radio at the physical level, such as:</p> <ul> <li>transmission power and receiver sensitivity</li> <li>frequency offset and drift</li> <li>modulation characteristics</li> <li>packet error rate</li> <li>intermodulation performance</li> </ul> <p>It can be found in our <a href="http://developer.nordicsemi.com/nRF5_SDK/nRF5_SDK_v11.x.x/">SDK</a>.</p><div style="clear:both;"></div>