HFU HF Underground

Loggings => HF Mystery Signals => Topic started by: Shortwave_Listener on January 28, 2023, 0043 UTC

Title: UNID 6942.4 kHz 0042 UTC 28 JAN 2023
Post by: Shortwave_Listener on January 28, 2023, 0043 UTC

Exact frequency is 6942.42 kHz. S9+10 with the KX4AZ KiwiSDR.

0042 UTC-Digital?
0315 UTC-Still going

Title: Re: UNID 6942.4 AM 0042 UTC 28 JAN 2023
Post by: Ray Lalleu on January 28, 2023, 0045 UTC

6942.43

carrier and noise

Title: Re: UNID 6942.4 AM 0042 UTC 28 JAN 2023
Post by: Skipmuck on January 28, 2023, 0219 UTC

This is some kind of utility station/data mode or something seriously wrong with the ute transmission!

Title: Re: UNID 6942.4 AM 0042 UTC 28 JAN 2023
Post by: Charlie_Dont_Surf on January 28, 2023, 0234 UTC

It's called a multitone signal because there are multiple carriers (a carrier is sometimes called a "tone"). This can be a way to carry more information than just a single carrier.

Now at 0225 there is our "old friend" the military Link-11 signal at 6943.5 as well.

(https://i.imgur.com/Lm4Axp2.png)