https://devzone.nordicsemi.com/f/nordic-q-a/127821/problem-with-power-of-ble-signalHi I am currently experiencing an issue with my custom board related to poor BLE signal performance. My devices are based on the NORA-B101 (nRF5340) combined with a SKY66408-11 front-end module. While some boards are performing as expected, othersen-USTelligent Community 13Thu, 23 Apr 2026 12:41:13 GMThttps://devzone.nordicsemi.com/thread/565400?ContentTypeID=1Thu, 23 Apr 2026 12:41:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6bdcebb6-ae60-48bb-a3f5-1ac1924736c8Bendik Heiskel<p>Hi Julien,</p> <p>The only way to verify the power is to measure the output power from the module using a spectrum analyzer.</p> <p>To check if the radio is being configure correctly you can check&nbsp;&nbsp;<a href="https://docs.nordicsemi.com/bundle/ps_nrf5340/page/radio.html#ariaid-title118">TXPOWER</a> register in the radio to see what output power the radio is transmitting at. This can be done using a debugger:<br /><pre class="ui-code" data-mode="text">nrfutil device read --address 0x4100850C --direct --core NETWORK</pre></p> <p>Best regards.</p> <p>Bendik</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/565087?ContentTypeID=1Fri, 17 Apr 2026 07:42:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:06442f96-a144-43f9-90e9-51d1149cb718Turbo J<p>Powering pins to 3.3V with VDD at 1.8V could fry those pins. There is a diode from the pins to the VDD rail that is not intended for powering the chip. The raise in VDD level could also blow up other stuff on the PCB that is connected to this rail.</p> <p>Most debuggers that I am aware of require a connection from target VDD to a voltage input that sets input/output levels for the debug connection.</p> <p>No idea about your RF issues, I am not an HF expert.</p><div style="clear:both;"></div>