03831.0: ZEMD: Zollboot Emden, D 2150 USB MIL 188-141 2G-ALE calling ZLST, no reply (01Mar17) (AAI) 06228.0: ---: Unid 2134 USB Hagelin HC-256 voice scrambler (01Mar17) (AAI) 06562.0: J64: Moroccan Military, MRC 2130 USB MIL 188-141 2G-ALE sounding (09Mar17) (AAI) 06562.0: P53: Moroccan Military, MR...

gracias

04618.0: BP25: German Police vessel Bayreuth, D 0622 USB MIL 188-141 2G-ALE handshake BPLEZS followed by R&S GM2100 HF modem transporting X.25 traffic (09Feb17) (AAI) 05420.0: HN02: Algerian Military, ALG USB 0809 MIL 188-141 2G-ALE calling PY01 (09Feb17) (AAI) 05528.0: ---: Unid 0818 USB Thales...

Hola ANgazu,
likely it's one of the HF burst waveforms from Stanag-4538. Have you a recording?

hola guys, It could be... but I'm not so positive about the MHFCS-net source. They use a 1500 Hz offset so, in my opinion, in case of ISB mode the distance of the two CFs should be 3000 Hz and not ~2750 Hz as measured. The 600Bd signal is surely from MHFCS but the 50Bd could be not correlated. https...