41–50 of 67 posts
This is a cool project. I bought both a HackRF and an Ettus USRP B210 years ago for playing with. I am yet to actually do anything of interest! Anyone want to share anything cool they’ve done in the SDR world?
I put together a VOR navigation receiver in a GNU Radio flowgraph. It was cool driving around the local beacon and having it point the right way as I moved.
Randomly clicked on to a greek located site, and wondered what they were talking about so I sent a bit of the audio to openai whisper api just to find it was mostly radio etiquette and souvlaki recipes.
> ![[websdr_recording_2023-10-27T05 51 46Z_7197.0kHz.wav]] I would like to wish you a very good morning, thank you very much for your years, and you too, if you have a celebration or you are celebrating, to enjoy them, to be well. Well, I have listened to Danasis, I have listened to Christos, I have listened to my friend Petros, I have listened to my friend Giorgos, all the company here. Well, I don't know, now I will listen to you here, if there are other guys, my good morning. But I won't take it, because I have to go. Just for a good morning, I stepped here at 797 and I know bread, and I will go to my friend Danasis, my friend here. It's me, your friend, come. Come, come, good morning, good morning Dimitris, good morning. What's up, what are we doing? I'm glad to hear you, my happy years, of course, I sent you my happy years yesterday, and I saw that you received it, so since yesterday it has been a while, but even today, it doesn't hurt, and the more wishes we give, the greater is the possibility that these wishes will come true. Well, I see. Don't tell me, let's talk for a while, Dimitris, before we move on to the next one. In any case, are you ready?
Earlier quoted context omitted.
I put together a VOR navigation receiver in a GNU Radio flowgraph. It was cool driving around the local beacon and having it point the right way as I moved.
Love that. Curious what kind of range did got (I assume not great).
If I were to do it over, I'd likely want to optimize things quite a bit to get the sensitivity up.
The amazing thing is, though the RTL-SDR dongles are only 8 bit devices, when you're down-sampling 2Mhz of them to audio frequencies, you gain quite a few bits of resolution. I routinely pick up signals below the quantization threshold.
I wonder what the lower bandwidth limit truly is, assuming a stable reference clock.
Earlier quoted context omitted.
for open source alternative take a look at https://www.openwebrx.de/ Can also demodulate digital modes (DMR, YSF, etC) and it have nice, modern UI. WebSDR have a weird list of requirements if you want to get install file - should open instance to public, provide lots of info, etc etc etc. It's not just closed-source.
I thought that it couldn't demodulate DMR and other modes unless it had the hardware to do so. Feel free to correct me if I'm wrong, though.
I have done this with a crude rtl-sdr stick.
Randomly clicked on to a greek located site, and wondered what they were talking about so I sent a bit of the audio to openai whisper api just to find it was mostly radio etiquette and souvlaki recipes.
> 12 and a half, one. So, I eat all my food. I eat these wonderful souvlaki. There's a table next to it. I sit down. So, once again, once again. The best souvlaki in Greece. What can I tell you? That's it. Every Saturday. And outside Athens. I'm not in Athens. Somewhere outside. So, we'll talk about it. So, Dimitris. So... Yes, yes. So, yes. Ok. I'll give the microphone to Papa My Golf. Ok. And he'll give 20 more. Th…
Earlier quoted context omitted.
> 12 and a half, one. So, I eat all my food. I eat these wonderful souvlaki. There's a table next to it. I sit down. So, once again, once again. The best souvlaki in Greece. What can I tell you? That's it. Every Saturday. And outside Athens. I'm not in Athens. Somewhere outside. So, we'll talk about it. So, Dimitris. So... Yes, yes. So, yes. Ok. I'll give the microphone to Papa My Golf. Ok. And he'll give 20 more. Th…
Most likely Papa Mike Golf, rather than My Golf, Mike being the NATO phonetic alphabet representation of M . It's a reference to the last three characters of the operator's callsign.
Is there any good open source software for WebSDR? I am living in a very noisy area from RF standpoint, but my parents are living in a better position. So I was thinking to install a SDR and a Raspberry and use them as remote SDR
I’d love to decode some radio signals - just to go through the “motions” and try my hand at it. Is something like an AM radio signal decoding relatively easy to understand? What about FM? And NTSC? Is the python code clear-ish? Complicated? Full of math I’m not appreciating? Thanks! Ok… it’s not exactly trivial: https://pysdr.org/content/rds.html#fm-demodulation