r/sdr

I've been building FoxSDR, a from-the-ground-up SDR receiver app for Windows. It's a complete clean-room implementation — no code read from or derived from any existing SDR project (SDR++, GQRX, etc.), everything written fresh from published specs and standards, with permissively-licensed dependencies only.

Features so far:

• Wideband receiver with spectrum + waterfall, AM/FM/SSB/CW demodulation, RDS decoding, click-to-tune
• SoapySDR hardware support (developed and verified on a USRP B200; RTL-SDR and others via Soapy modules)
• Full browser remote control — the entire app is also usable from a web browser on your LAN with feature parity: waterfall, tuning, audio streaming, map, decoders, even plugin installs
• Plugin system with a public catalogue: ADS-B (verified against real off-air traffic), AIS, APRS, POCSAG, SSTV (Martin/Scottie), aircraft registration lookup, and more
• Built-in map showing decoded aircraft, vessels, and APRS stations, with plugin-supplied basemap tiles
• IQ recording, bookmarks, scanner, frequency presets
• Windows installer, no telemetry games, no account required

Licensing: free for hobbyist/noncommercial use — permanently, no trial, no activation, nothing withheld. Commercial use needs a paid licence (PolyForm Noncommercial).

Links:

• Website: https://foxsdr.com
• Plugin catalogue: https://github.com/wonderingStars/foxsdr-plugins
• Main repo: https://github.com/wonderingStars/foxsdr

Happy to answer questions — feedback very welcome.

https://preview.redd.it/wv46m55sw7kh1.png?width=1273&format=png&auto=webp&s=6c1b987d0add79ec5e1aed2737fe42f260fa6fe2

Hey, I love using my little RTL SDR, but using it out and about is annoying (having to have laptop etc). I’m a full time software/hardware dev with a bit of experience bringing hardware and ios apps to market so I thought, hey I’ll make something!

Aims are to make something small around my existing rtlsdr (looking at custom sdr stuff means a lot more certifications + time). Probably a Linux based device + battery + rtlsdr all in one that I can put in my backpack, and have a spectrum analyser shown over Bluetooth to my phone. I’m imagining a Radiacode sort of thing, if my hopes aren’t too high!

Would be awesome to have it give me notifications + recordings if a particular part of the spectrum hits a set amplitude.

I think I’ll probably start with an internal RTLSDR (need to speak to them and see if they sell the raw boards), then later move to something you can just plug in an airspy or sdrplay for those wanting better resolution etc.

Battery life should be about 4-6 hours of constant monitoring with the size I’m aiming at.

Would love to get some feedback, and any other ideas + features?

Hi all, I am working on a research on jamming. My victim link is the example GNu radio OFDM link. However the problem is even if I just use a Gaussian noise jammer (2 Mhz bandwidth) to jam this link (400 khz bandwidth), the link dies very soon at JSR = -5 db (basically this mean the jammer’power is 5 db weaker than the victim transmitter’s)

So have I had any problem with my hardware? I use the same usrp and daughterboards for jammer and victim, and I believe the tx power of jammer maybe a 1-2 db different but the barrage jammer should only win at jsr > 0 as I suppose.

Thanks for reading.

I need some suggestions for portable SDR to bring with me during my holidays. I don’t bring with me any pc, so i would need something standalone that can also pass through customs. I haven’t any HAM licenses. It would be a bonus if it has a screen to see the waterfall.

Thanks to all!

https://reddit.com/link/1vn5qyi/video/6s8jfsyt04jh1/player

For some reason, My SDRConsole volume got very small and quiet, I tried turn on AGC but it is unavailable with BC-FM mode.

This don't happen with WFM mode and I don't know why, Can anyone help me.

Hi all, sorry if this is the wrong place to ask.

I recently have become engrossed in using KiwiSDR (I use an iOS app called Echo that basically compiles multiple databases into one so I can listen through the app instead of having to navigate all the different sites) to just look through different signals around the globe, since I am intrigued by the idea of listening to realtime airwaves and looking for patterns/oddities on the waterfall.

Obviously, though, the limitation of KiwiSDR is that I can only tune into select stationary SDR receivers.

I would love to have a standalone, portable device (preferable small, maybe pocket size but I am not too picky) that I could use from anywhere, perhaps take walks with headphones and look for frequencies, or scan from my couch when I’m bored.

Bonus points if it has a waterfall.

Does such a device exist? If so, any recommendations? Please be gentle with me, I am a major noob beyond the basic functions. Again, sorry if this is the wrong sub, if it is, please direct me towards a better fit :)