https://devzone.nordicsemi.com/f/nordic-q-a/118253/nrf52840-802-15-4-sniffer-data-from-adjacent-channelHello, I have recently switched to nrf52840 dongle for 802.15.4 sniffing. I did a simple test with a ZigBee Green Power sensor sending data on channel 11. On the receiver side there is a dongle receiver which is sending acknowledge to sensor on channelen-USTelligent Community 13Wed, 22 Jan 2025 15:36:38 GMThttps://devzone.nordicsemi.com/thread/519614?ContentTypeID=1Wed, 22 Jan 2025 15:36:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c17e79ec-fcf4-4b4d-be3c-7466be23ecd5mathiaso<p>Hi.</p> <p>There are no <a href="https://docs.nordicsemi.com/bundle/ps_nrf52840/page/radio.html#ariaid-title119">receiver selectivity</a> numbers for 802.15.4 in the nRF52840&#39;s PS but the nRF52833 has the same radio front-end and in that PS you&#39;ll see that the <a href="https://docs.nordicsemi.com/bundle/ps_nrf52833/page/radio.html#ariaid-title134">receiver selectivity</a> number is -33 dB for <em>IEEE 802.15.4 mode, Adjacent (-5 MHz) rejection</em> and -38 dB for <em>IEEE 802.15.4 mode, Adjacent (+5 MHz) rejection</em>.<br /><img style="max-height:240px;max-width:320px;" src="https://devzone.nordicsemi.com/resized-image/__size/640x480/__key/communityserver-discussions-components-files/4/pastedimage1737560101382v1.png" alt=" " /></p> <p>As you&#39;re sniffing on channel 11 and are seeing traffic on channel 12, -38 dB should be the number in your case.</p> <p>Best regards,<br />Mathias</p><div style="clear:both;"></div>