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HF Signal like Radio!?

Posted: Wed Jul 25, 2018 9:00 am
by Username
Hi
I found many Signals on <30Mhz who Sound like like the Digital Radio: https://www.sigidwiki.com/wiki/DRM but the are much less Bandwith. The use ~3khz Bandwith. The Sound like some QAM,OFDM Modulation.
Does anyone have an Idea what that can be and how to decode under Win?
Thanks

Re: HF Signal like Radio!?

Posted: Thu Jul 26, 2018 12:00 am
by rtlsdrblog
Probably STANAG 4285 https://www.sigidwiki.com/wiki/STANAG_4285.

You can try decoding some with Sigmira or Sorcerer, but these are encrypted military channels so if their in use you'll receive nothing with those programs. Sometimes they run in a test mode though, and you can get test text showing up.

Re: HF Signal like Radio!?

Posted: Thu Jul 26, 2018 8:57 am
by Username
sounds like this. :D
Are there any similar Transmission who could sound like that?

Re: HF Signal like Radio!?

Posted: Fri Jul 27, 2018 1:49 am
by rtlsdrblog
There are other STANAGs versions out there, but 4285 is the most common.

Re: HF Signal like Radio!?

Posted: Sat Jul 28, 2018 8:02 pm
by Username
I mean is there some other Format or Standard than the Military one?

Re: HF Signal like Radio!?

Posted: Tue Jul 31, 2018 10:49 pm
by rtlsdrblog
Other formats that sound the same? Not that I know of. But look through the HF section on sigidwiki, and play any that have squarish looking waterfalls.