https://devzone.nordicsemi.com/f/nordic-q-a/19430/operate-nrf24l01-below-2400mhzWe are working on a project that will operate in the MBAN frequency range of 2360-2390mhz. One of our current products utilizes the nRF24L chip, and we were interested in operating (even at reduced efficiency) our current hardware in that range for aen-USTelligent Community 13Fri, 03 Feb 2017 10:05:28 GMThttps://devzone.nordicsemi.com/thread/75466?ContentTypeID=1Fri, 03 Feb 2017 10:05:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f2f5bcc1-12e5-46ec-b96f-970243f97e3crun_ar<p>This is out of spec as you probably know, so I&#39;m afraid there isn&#39;t any register settings you can change to obtain this (As can be done on the nRF5x series). This means you would have to use a crystal frequenzy of about 15,73 MHz to get the correct frequenzy range (Very hard to find a crystal, but might be possible using an external frequenzy generator). But please note that the PLL might have problems looking at the lowest frequency.</p><div style="clear:both;"></div>