https://devzone.nordicsemi.com/f/nordic-q-a/4467/radio-test-channel-selectionAccording to the data sheet for the nRF51822 the channel range is from 2.400 - 2.483 GHz. In the radio test example however, it limits the range of test channels to 2.400 - 2.480 GHz. Is there a reason that the top 3 channels are not accessibleen-USTelligent Community 13Mon, 17 Nov 2014 14:24:02 GMThttps://devzone.nordicsemi.com/thread/15850?ContentTypeID=1Mon, 17 Nov 2014 14:24:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:50aeadd2-3b67-4dbd-a454-fb6549115c6eStefan Birnir Sverrisson<p>Hi</p> <p>The specification determines what the radio of the nRF51 chip is capable of. I am not certain why they have chosen 2.400 - 2.480 GHz in the example, but this is the range of the Bluetooth Low Energy frequencies, as can be seen from <a href="http://www.connectblue.com/fileadmin/Connectblue/Web2006/Images/Press_Image_downloads/Articles/EW-LE/Bluetooth_frequencies_-_low_energy___Classic.jpg">this image</a>. But no, the remaining channels should be usable.</p><div style="clear:both;"></div>