https://devzone.nordicsemi.com/f/nordic-q-a/50094/alternative-to-anritsuIs national instruments also a certified tester for your DTM?en-USTelligent Community 13Mon, 22 Jul 2019 12:03:07 GMThttps://devzone.nordicsemi.com/thread/199770?ContentTypeID=1Mon, 22 Jul 2019 12:03:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c67ef39e-8707-4ca5-a4f0-33a4521f7e45bjorn-spockeli<p>Hi WeiWei,&nbsp;</p> <p>the DTM(Direct Test Mode) is defined by the Bluetooth specification, see&nbsp;BLUETOOTH SPECIFICATION Version 5.0 | Vol 6, Part F.</p> <p>Hence, any tester that is compliant with the Bluetooth DTM specification can be used to test our nRF5x devices. You only need to flash the&nbsp;<a title="Direct Test Mode" href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v12.0.0/ble_sdk_app_dtm_serial.html?cp=5_5_9_4_4">Direct Test Mode</a>&nbsp;example to the nRF device and modify the UART pin numbers&nbsp;that is connected to the DTM tester if you&#39;re testing a custom board.&nbsp;</p> <p>Best regards</p> <p>Bjørn</p><div style="clear:both;"></div>