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Loggings => HF Mystery Signals => Topic started by: alleycat on December 26, 2022, 0323 UTC

Title: PSK? narrowband signal at 5358.62 kHz
Post by: alleycat on December 26, 2022, 0323 UTC

Unidentified approximately 30 Hz bandwidth signal (markers are 50 Hz apart); unchanging nature suggests idle marker. Falls in 60 meter amateur band, but doubt it's amateur-related. Can't find a close match at sigidwiki. Any ideas? Thanks!
(https://www.lutins.org/sdr/5358_62.jpg)

Title: Re: PSK? narrowband signal at 5358.62 kHz
Post by: Josh on December 27, 2022, 1737 UTC

Batputer says it's 2-ary psk, 33.33Hz bit rate.

Title: Re: PSK? narrowband signal at 5358.62 kHz
Post by: alleycat on December 30, 2022, 0352 UTC

Wish I had a batputer - would probably need a batcave to put it in, though. Still, I have to question the result - my preliminary research (i.e., googling) suggests this is a mode used for satellite communications - wouldn't expect to see it in the amateur 60 meter band!

Title: Re: PSK? narrowband signal at 5358.62 kHz
Post by: ~SIGINT~ on December 30, 2022, 0536 UTC

Perhaps this was HAARP related. Have a look at the waterfall display in the following post:
9600 USB HAARP December 27 20:45 (https://www.hfunderground.com/board/index.php/topic,107410.msg336842.html)

The lissajous figure looks very similar. Perhaps similar type of modulation.