24 November 2020

unid 200Bd/400 FSK bursts

Interesting 200Bd/400 FSK bursts heard on 12087.4 KHz/USB and reported by my friend Eduard (Eddy) Waters from Australia. The bitstream consists of repeated sequences of 32 bit; I did not find a suitable polynomial.

Fig. 1

Probably a kind of telecontrol sending the same values, for example 4-bit groups (assuming 1001 as the first group):
1001 0011 0001 1101 1011 0010 1100 1100
1001 0011 0001 1101 1011 0010 1100 1100
1001 ...
or groups of 8/16 bits.

Fig. 2

We wonder what that was all about, seems strange it has not come back on.

https://yadi.sk/d/-emC-NSD_0c8Bg

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