12 May 2018

unid PSK-8 bursts systems (heard recently)

8040.0/usb 0755z 188-110A Serial, long sequence of 1200ms bursts (noise by adiacent Northwood HF-fax) bearing the same sequence




https://yadi.sk/d/WcrZVwFU3VkzfT 

11072.0 CF PSK-8 2800Bd, two stations exchanging 700ms bursts. The waveform fas a period of 140 symbols, most likely 40 symbols are used for mini-probes and 100 symbols for data. Bursts start and end with a short 2500Hz tone.



 

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