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I'm trying to extract the code of my garage remote, but i have some difficulty to find witch modulation has been used.
At first I thought it was a simple digital modulation, but there is some strange situation that it seems that the signal changes phase. Here are some pieces of signal extracted with my SDR dongle:
f.Carrier = 868.25Mhz
T.rectangle = 400us
enter image description here enter image description here

Here is the spectrum of the signal:

enter image description here enter image description here

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    $\begingroup$ What are the red and blue lines? $\endgroup$ – MBaz Apr 9 '18 at 20:00
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    $\begingroup$ Are we looking at time vs. amplitude? $\endgroup$ – AnonSubmitter85 Apr 10 '18 at 1:48
  • $\begingroup$ @MBaz The blue line it's the real signal and extracted and the reds rectangles are a 400us reference used for divide the signal over time and to help me understand $\endgroup$ – Radulex Apr 10 '18 at 4:05
  • $\begingroup$ @AnonSubmitter85 Yes exactly $\endgroup$ – Radulex Apr 10 '18 at 4:22
  • $\begingroup$ Well, if it's the phase that's odd, then you should probably include that information as well. What about the spectrum? $\endgroup$ – AnonSubmitter85 Apr 10 '18 at 4:47

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