"16-Tone" Drifting FSK Signal
This signal has been spotted by Antenna101 in Sarajevo, Bosnia and Herzegovina on 10th December 2023 on 603 MHzMegaHertz (MHz) 10^6 Hz.
The origin of the signal has a few suspicions as what it can be:
3. PC RFIa specific subset of electrical noise on the Electromagnetic interference (EMI) spectrum (Although seems unlikely)
The QTH of my station (Antenna101) is not far away from a military base and a few embassies which makes me think this is could be either military/embassy.
This station wobbles when idle and when it sends traffic, it's fixed on the frequency to send traffic, even sometimes frequency hopping while doing so.