HFU HF Underground

Loggings => HF Mystery Signals => Topic started by: alleycat on April 02, 2022, 0406 UTC

Title: 7939 @ 0350z - analog? digital? SigIDWiki fails me again!
Post by: alleycat on April 02, 2022, 0406 UTC

I never seem to be able to find a decent match for my mystery signals at SigIDWiki. This one looks like digital modes with a number of discrete frequency points used, but the frequencies "bend" while being transmitted (voice encryption?). Sorry I'm not more versed in the proper terminology. Screen capture of waterfall:
(https://www.lutins.org/sdr/7960_3_kHz_bw.JPG)
Audio clip: https://www.lutins.org/sdr/7960_USB_3_kHz_bw.mp3 (https://www.lutins.org/sdr/7960_USB_3_kHz_bw.mp3)

Thanks for any ID assistance!

Title: Re: 7939 @ 0350z - analog? digital? SigIDWiki fails me again!
Post by: Token on April 02, 2022, 1430 UTC

This sounds very much like one of the jammers I have heard used, but can't remember which off the top of my head.  Maybe Cuban?

T!

Title: Re: 7939 @ 0350z - analog? digital? SigIDWiki fails me again!
Post by: alleycat on April 03, 2022, 0301 UTC

I think you're correct - I could hear a weak broadcast under one of these signals.