https://i56578-swl.blogspot.com/2020/07/50bd300-async-5n15-fsk-likely-serbian.html
50Bd/300 async 5N1.5 FSK (likely Serbian-Mil) | diario SWL I-56578 Antonio
6374.8 KHz (cf) async 50Bd/300 FSK using 5N1.5 framing, after demodulation: UFBV UFBV UFBV de FNCS FNCS FNCS E9U9 E9U9 E9U9 de FNCS FNCS F...
https://i56578-swl.blogspot.com/2019/05/ofdm-30-1-pilot-4-dpsk-50bd-possibly.html
OFDM-30 (+1 pilot, +2) DPSK 50Bd | diario SWL I-56578 Antonio
updated The signal was recorded at 8403.5 KHz (CF) thanks to the use of some KiwiSDRs [1], it occupies a bandwidth of 2500 Hz and s...