Does this look familiar to anyone ?

enter image description here

  • 2
    $\begingroup$ At 433.92MHz it could be any one of dozens of proprietary signalling protocols. That's where all your wireless thermometers and countless other devices broadcast $\endgroup$
    – Duston
    Commented Jan 23, 2022 at 22:35

1 Answer 1


Since there is no visible carrier (no peak in the middle), it can not be an AM/ASK signal, which has half of its transmit power on the carrier. This leaves PSK and FSK as the likely choices.

The two visible peaks indicate this is most likely a simple 2-FSK signal, and the higher magnitude of the upper peak means the transmit data has more ones than zeros.


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