Talk:Unidentified signal (APRS-like)

Vincent 02:55:47 UTC 08/10/2025: By listening to it, with the APRSAutomatic Packet Reporting System, an amateur radio-based system for real time tactical digital communications of information of immediate value in the local area-like sound, I guarantee you it's Audio Frequency Shift Keying (AFSKAudio Frequency-Shift Keying) modulation. That might even be AFSKAudio Frequency-Shift Keying signalling or paging. Here are some standard Bell 202 VHFVery High Frequency (30-300 MHz) Audio Frequency Shift Keying specifications (which might be the case): Mark frequency (1s):2200Hz Space frequency (0s):1200Hz Shift frequency: 1000Hz BaudBaud (unit symbol Bd) is the unit for symbol rate or modulation rate in symbols per second. rate: 1200

Hope this helps!