5 February 2017

CV-786 (TRC-75) FSK 75Bd/850Hz bursts

CV-786 is a synchronous wideband FSK mode compliant with STANAG-4481, shore-to-ship RATT FSK 75Bd/850 waveform: in this sample the bursts transport KG-84C on-line encrypted contents. I copied a long-run transmission (...hours) on 11464.0 KHz/USB with 2 KHz offset; given the strong signal, the tx site could be the US military base in Niscemi, Sicily Island Italy.

CV-786 mode is built in Rockwell-Collins MDM-2001 HF Modems and used in TRC-75 transceivers:

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