-4Mhz Radio Frequency Interference when using nrf24l01 and nrf52832 chipshttps://devzone.nordicsemi.com/f/nordic-q-a/51496/-4mhz-radio-frequency-interference-when-using-nrf24l01-and-nrf52832-chipsHi all, We always have -4Mhz Radio Frequency Interference when using nrf24l01 and nrf52832 chips.We use nrf24l01 as a slave receiver, and use nrf24l01 or nrf52832 as a master transmitter.For example, we set slave receiver frequency at 2420Mhz and it canen-USTelligent Community 13Tue, 03 Sep 2019 12:42:57 GMTRE: -4Mhz Radio Frequency Interference when using nrf24l01 and nrf52832 chipshttps://devzone.nordicsemi.com/thread/207686?ContentTypeID=1Tue, 03 Sep 2019 12:42:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9fc3b5a8-ca5e-4b1b-ade2-25297bec471fAndreas<p>Hi,</p> <p>&nbsp;</p> <p>Wikipedia has an article which describes this pretty well:&nbsp;<a href="https://en.wikipedia.org/wiki/Superheterodyne_receiver#Image_frequency_(fIMAGE)">https://en.wikipedia.org/wiki/Superheterodyne_receiver#Image_frequency_(fIMAGE)</a></p> <p>&nbsp;</p> <p>Best regards,</p> <p>Andreas</p><div style="clear:both;"></div>RE: -4Mhz Radio Frequency Interference when using nrf24l01 and nrf52832 chipshttps://devzone.nordicsemi.com/thread/207645?ContentTypeID=1Tue, 03 Sep 2019 11:08:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6930ca95-616c-4f5e-b606-ed087aa7b59bjane_song<p>Hi，</p> <p>&nbsp; Thanks a lot!</p> <p>Could you explain that in details or recommand some other documents?How does the 4Mhz influence the normal frequency?&nbsp;</p><div style="clear:both;"></div>RE: -4Mhz Radio Frequency Interference when using nrf24l01 and nrf52832 chipshttps://devzone.nordicsemi.com/thread/206573?ContentTypeID=1Wed, 28 Aug 2019 10:47:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:54a5d049-25cf-46b7-aade-0968163856e2Andreas<p>Hi,</p> <p>&nbsp;</p> <p>The nRF24L01+ has image frequency 4 MHz above the RF frequency, meaning it will pick up data at this frequency also.</p> <p>&nbsp;</p> <p>Best regards,</p> <p>Andreas</p><div style="clear:both;"></div>