I found the file. I see what you means about multiple FSK, though I
think there are 8.
800
960
1120
1310 (wider that the other)
1460
1640
1790
1970



Ron Baker, Pluralitas! wrote:
wrote in message
ups.com...
Nothing heard in the SF Bay area on that frequency. 23 pst


Yeah, I'm not picking it up right now. I have been receiving
it regularly. I've specifically logged it:
2005/12/18 1156 pst
2005/12/21 2026 pst
2005/12/22 0945 pst
2005/12/23 1036 pst

I've put a .wav of it in alt.binaries.alt.




Ron Baker, Pluralitas! wrote:
I regularly pick up an unusual data signal
at 15937.5 kHz (USB). It is 7 fsk signals stacked
in frequency. They are 170 Hz shift and there
is 170 Hz between them. The Baud rate is 75.
All seven channels send the same bit stream
but offset in time by as much as 6.66 seconds.
The bits show a flat autocorrelation.
Anybody know what this is/ who is sending
it?

--
rb

8 would make more sense, being a power of 2, but
it looks like 7 to me. I've posted the spectrogram
to alt.binaries.alt.

And I still am not hearing it now. My logs are
from before Christmas. Maybe it was Santa and
his elves and now that the season is past they
have no traffic.
Well, I'll keep checking for it.

--
rb

wrote in message
ups.com...
I found the file. I see what you means about multiple FSK, though I
think there are 8.
800
960
1120
1310 (wider that the other)
1460
1640
1790
1970



Ron Baker, Pluralitas! wrote:
wrote in message
ups.com...
Nothing heard in the SF Bay area on that frequency. 23 pst


Yeah, I'm not picking it up right now. I have been receiving
it regularly. I've specifically logged it:
2005/12/18 1156 pst
2005/12/21 2026 pst
2005/12/22 0945 pst
2005/12/23 1036 pst

I've put a .wav of it in alt.binaries.alt.




Ron Baker, Pluralitas! wrote:
I regularly pick up an unusual data signal
at 15937.5 kHz (USB). It is 7 fsk signals stacked
in frequency. They are 170 Hz shift and there
is 170 Hz between them. The Baud rate is 75.
All seven channels send the same bit stream
but offset in time by as much as 6.66 seconds.
The bits show a flat autocorrelation.
Anybody know what this is/ who is sending
it?

--
rb