4 August 2015

looking for CIS-12 PSK-4

CIS-12 MPSK 12 tones (AT-3004D, AT-3104): just another PSK-2 log. I am looking for the PSK-4 waveform [1] since months,  but unsuccessfully. It's one of the two: either they do not use it anymore or I'm really unlucky. Who knows?

KarapuZ sent me a sample of this mode along with his comment: "this mode modem is less resistant to interference, it is mainly used to transmit a surface wave, or at a distance of not more than one hop. A chance to hear him in Italy is very small".
Thanks KarapuZ, I could update my signal database and my previous CIS-12 post

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