yes, 30 baud... my typo!
I could not get good recordings this morning but I'll try to monitor that frequency during the next days.
"Said that, I bet we are facing some tests of HFDVL modem." I think so, more over that same waveform could be heard on 14350.0

ciao

hola, buonos dias here a short recording of an OFDM modem heard on 23141.2 (signal center freq.): you have to resample it to 9600 Hz! It seems to me 73 tones, the top tone un-modulated (pilot tone?). Here the parameters: Br 40, Sh 37.5, K 1/4, modulation seems to be PSK-4 Can you confirm? https://ww...

I apologize, you are right:
https://www.dropbox.com/s/n1fikfmz8wgmf ... z.wav?dl=0

possibly XPA 10 baud?

This sample has been recordered on 9 May around 0640z on 13369.0 (cF) USB 9243.0 KHz USB, unfortunately I went on this frequency just at the end of the transmission, so I could not record all the initial/preamble part. The signal spreads on a ~600 Hz bandwidth, each tone is 100 msec length. Manipula...

thanks for accepting me, hope to start a good collaboration.
I have just seen Barcellona-Bayern: great team and great show !

Antonio, I5-56578