What is the source of interference?

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tim.krause
Posts: 1
Joined: Wed Feb 04, 2026 5:19 pm

What is the source of interference?

Post by tim.krause »

I've just been using the BladeRF 2.0 A4 and found some interference. The antenna is a 20cm monopole.
To demonstrate the interference I have modified GQRX and wrote a python script to control GQRX and take a screen shot at the frequencies that this interference is most noticeable. Then the screenshots were compiled into a mp4 video and uploaded to my Google drive.
Here's a link to the video file on my Google drive.
sweep.mp4
You can view it on Google but for the best quality you have to download it.
I live within 200m of a cell tower. Could this be the source of the interference?
bigbear
Posts: 1
Joined: Wed Mar 18, 2026 5:09 am

Re: What is the source of interference?

Post by bigbear »

tim.krause wrote: Wed Feb 04, 2026 5:43 pm I've just been using the BladeRF 2.0 A4 and found some interference. The antenna is a 20cm monopole.
To demonstrate the interference I have modified GQRX and wrote a python script to control GQRX and take a screen shot at the frequencies that this interference is most noticeable. Then the screenshots were compiled into a mp4 video and uploaded to my Google drive.
Here's a link to the video file on my Google drive.
sweep.mp4Friday Night Funkin
You can view it on Google but for the best quality you have to download it.
I live within 200m of a cell tower. Could this be the source of the interference?
Are any of you BladeRF users experiencing interference near cell phone towers like I am? I just ran a Python script to capture the frequency spectrum via GQRX, and the video sweep shows very clear interference bars in sensitive frequency bands. At a distance of 200m, the transmit power from that tower is definitely saturating my SDR. Should I switch to a directional antenna to reduce the beam pattern towards that cell phone tower?
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