Strange signals on ham radio

Control wave

but what are they sending ?

I could smells the vacuum tubes on that video.

Hmm, there’s something to think about.

DRM is high speed. It is the new digital broadcast standard for shortwave radio.

It uses OFDM modulation to deal with the noise and fade typical of HF.

They're using subcarrier shit, and that's easy and fairly resilient. I'm talking about the high-speed, high-bandwidth modes that you can use to transmit an appreciable amount of data in a decent time with, not just a few characters to TX a callsign and program information.

I've got the frequency dialed in, if I hear anything I'll see if qsstv can pick it out.

And record a video and put it here if it’s not difficult

After I'm done working I'll also try to route the audio from the Youtube videos through the program. I don't know what the result will be but I've decoded stuff from the oddest bits of audio before.

Good luck !! Will wait

Okay, that signal IS a SSTV (Slow Scan TeleVision) signal. Here's a link to the decoded picture:

[link to imgur.com (secure)]

The quality isn't good at all since it was a recording of an HF signal, but you can make out what it is supposed to be.

Well done.

[link to swling.com (secure)]

I concur, the first video is noise as near as I can tell. Might run it through multimon-ng for giggles.

Thank you, and that was a great link for anyone wanting to learn more about Wolverine Radio!

cool

Stuxnet return?

No, it is a 32 to 64 kbs channel transmitting digital audio using AAC coding. It is pure digital, not analog.

It's a digital input transmitted over an analog signal. Everything in radio is analog, a radio emission is unescapably analog, what differs is how the reciever and/or transmitter process that signal.

wow that is cool, great job. Pretty neat someone is out there. Also though should we be listening to it ? That was the motto in Red Dawn.

Now you're just being obtuse.

Not really. A radio signal is a carrier wave - inherently analog. It can be modulated in various ways - CW, AM, FM, SSB. All analog modes. Now you can send a digital signal over one of these modulations but it is still susceptible to the failings of analog. The fact that we can send digital signals over analog modes is a testament to the robustness of the protocols and that the human interpreter can fill in a lot of information that gets munged.

*sending out a signal to the ham sammiches*