Motion Detection System creating Interesting Interference
At first I had no idea what it could be and I didn’t know if the 2 pics were part of the same signal or not. So I didn’t know if I was looking for 1 or 2 sources. After a while walking around with the spectrum analyzer open, trying to figure out where these interferences could come from, I still couldn’t figure out where this was coming from.
I was working with my good friend Cédric Terrier on this one and he told me he had seen similar interferences coming from motion detection sensor. BINGO, after that it took us a few seconds to find them. Indeed, two of them were installed in two adjacent rooms.
THE TECHNOLOGY BEHIND THESE SENSORS
These sensors use an interesting technology to detect motion. It uses 2 directional antennas to send signals on the 2450MHz frequency (according to the specifications. In reality, we see that different frequencies are in use). Their technology allows a more precise measurement of the motion and is event able to detect the speed of the intruder!
All the information related to this product can be found in the following specification sheet document:
Thank you for reading!