Mois : mars 2015
I have noticed this weekend that the usual FSK-2 sent by the French Navy are no longer in use, looks like they were replaced by STANAG-4285 @ 600L (crypto.. of course..)
Those STANAG-4285 are easily recognizable on a waterfall because they have a ticking noise on each edge of the 2400Bd 8-ary waveform as shown on the screenshots below:
note1: the ticks aren’t sync..
note2: 8517.0 USB & 16966.0 USB are also impacted by that modification