Could you help me please to identify this signal:
Recording (upper sideband): https://afiskon.ru/s/88/ab789488f7_unknown_signal_bpsk.mp3
This is definitely not RTTY. It seems to be PSK-modulated, but it’s not BPSK-31. Doesn’t sound like SSTV. I tried different modulations in Fldigi and didn’t manage to identify it.
What is that?