HF Signal like Radio!?

[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

[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.

[Username]

sounds like this.
Are there any similar Transmission who could sound like that?

[rtlsdrblog]

There are other STANAGs versions out there, but 4285 is the most common.

[Username]

I mean is there some other Format or Standard than the Military one?

[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.