Does radio on NRF51822 uses RTC timers when it is ON?https://devzone.nordicsemi.com/f/nordic-q-a/4287/does-radio-on-nrf51822-uses-rtc-timers-when-it-is-onHi, I use NRF51822 as a transmitter in &quot;gazelle mode&quot; so no soft-device is enabled. At the other end I use NRF24LE01 as a receiver. In order to see what is going on in my transmitter code I use two ways of displaying messages. One uses custom UARTprintfen-USTelligent Community 13Tue, 04 Nov 2014 14:27:31 GMTRE: Does radio on NRF51822 uses RTC timers when it is ON?https://devzone.nordicsemi.com/thread/15285?ContentTypeID=1Tue, 04 Nov 2014 14:27:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0131fbd0-a736-4147-abea-942caeaf45dfAsbj&#248;rn<p>Depending on the configuration Gazell requires certain resources. It sounds like, as you say, that the application is accessing or using some resources that&#39;s used by the radio. It could be timer0, ppi channel or it could be the software interrupt. <a href="https://devzone.nordicsemi.com/documentation/nrf51/6.1.0/s110/html/a00113.html#gzll_resources">Please have a look in the chapter &quot;Resources&quot; in Gazell documentation.</a></p><div style="clear:both;"></div>