techniker Posted January 6, 2020 Share Posted January 6, 2020 All the major wireless providers are slowing putting up 5G towers around my area and ever since a new tower was put up about 300 meters from my house I've been getting headaches and ringing in my ears. I've noticed this when I'm near any of the new low towers that have gone up. While scanning around trying to find out what is being sent out from those new towers I stumbled upon a signal that is very active and it seems to be coming from everywhere. I can pick it up on my handheld RF Explorer spectrum analyzer, RTL-SDR and BladeRF 2.0 A9 with various antennas. I've tried using my laptop and desktop. It sits at the end of the 2.4 band between 2486-2500 MHz. I took a drive with my laptop and BladeRF around the city and out into the country and it's there all the time (with slight changes to amplitude) so there's no way this could be coming from the new towers. Where could this be coming from? Satellite? I'm going to try making a small Faraday cage to see if I can block it. Quote Link to comment Share on other sites More sharing options...
techniker Posted January 7, 2020 Author Share Posted January 7, 2020 It actually looks like the lower 2.5 range is a lower harmonic of a 5 GHz signal. Same pattern but more intense! Quote Link to comment Share on other sites More sharing options...
Cap_Sig Posted January 7, 2020 Share Posted January 7, 2020 This is interesting... Can you post a more isolated waterfall of a narrower range to see a single signal better? Quote Link to comment Share on other sites More sharing options...
techniker Posted January 12, 2020 Author Share Posted January 12, 2020 Sorry for the delay. Been a busy start to the new year. Here's a recording of what I see. Also poked around some 2.4GHz WiFi channels, including my own, to show that the device is actually working properly. https://youtu.be/X7C1U3LsVC Quote Link to comment Share on other sites More sharing options...
Cap_Sig Posted January 14, 2020 Share Posted January 14, 2020 No worries. I will take a look at it later this week. Quote Link to comment Share on other sites More sharing options...
Cap_Sig Posted February 7, 2020 Share Posted February 7, 2020 Looks like some kind of carrier signal. Need to dig into the exact freq range and see how it falls with 5G band. Quote Link to comment Share on other sites More sharing options...
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