RFSPΔCΞ retweeted
Testing per-sample IQ Doppler correction in SpectraFlux. Satellite tracking software sends frequency updates via rigctld — instead of retuning the SDR (which causes PLL transients and audio glitches), the correction is applied as a phase-continuous NCO rotation on every IQ sample. SDR parks at a clean center frequency, Doppler offset handled entirely in the digital domain. Zero retune latency, no phase discontinuities. Here's a Python script driving a ±50 kHz sinusoidal S-curve through rigctld while the spectrum tracks it smoothly.
SpectraFluxのIQドップラー補正をテスト中。 衛星追尾ソフトからrigctldで周波数更新を受信し、SDRの再チューニングではなく、IQサンプルごとにNCO位相回転で補正を適用。PLLの過渡応答やオーディオの途切れがゼロ。Pythonスクリプトで±50kHzの正弦波ドップラーカーブをシミュレーションしています。
RFSPΔCΞ retweeted
If you are into SDR, buy a Mac mini. Go into debt if you have to.Or a Studio. You'll want it for what's coming.
SpectraFlux beta is up. Apple Silicon only. No support.
rfspace.com/RFSPACE/SpectraF…
RFSPΔCΞ retweeted
📡 New: CloudSDR Protocol Emulator
🐍 Python framework for SpectraVue integration
🔓 Bypasses SpectraVue hardware checks
🛠️ Starting point - extend for RTL-SDR, HackRF, etc. 📊 Dummy I/Q included, add your radio's data stream
Build your own SDR bridge!
github.com/ibelinp/CloudSDR-…
RFSPΔCΞ retweeted
I'm happy to release the first PUBLIC pre-release of SDR++ for #Android! Please read the github post for a download link, supported hardware, etc.(currently natively supported are the @rtlsdrblog , the @airspy_com, the @GSGlabs #HackRF,@rfspace, and more!)
github.com/AlexandreRouma/SD…
RFSPΔCΞ retweeted
playing with a "QRM Eliminator" using the @rfspace NetSDR-X2 with an active whip for noise antenna and internal phase/amplitude adjustment inside the SDR.
RFSPΔCΞ retweeted
Testing out the R8600 with @rfspace SDR-IP and latest SVue. Working very well as expected. Potential setup for 2nd x-band radio/sdr station.
RFSPΔCΞ retweeted
How do you visualize 2 million antenna gain measurements? 🤯 We animate frequency swept 3D patterns into a video. Here's the new RFSpace DIP700 Broadband Dipole. @rfspace @ibelings #UWB #IoT antennatestlab.com/antenna-e…
RFSPΔCΞ retweeted
Here's a 1 minute IQ recording from 2 meters. Had to transmit it to my other computer across the room :) Recording should play back on SDR# & @RFSPACE Spectravue.
dropbox.com/s/uj97tp2j3a2bjo…
late 80s, with no internet or cellphones. Remember waking up before sunrise to work EU <-> HK1 on the shortwave bands. #DugaRADAR was always strong. I've recreated it in 16bit IQ w/ slightly better filtering than used in the #USSR thanks to details and hand traced image by G3PLX
RFSPΔCΞ retweeted
Seasons greetings! In the front office we have an LPDA Christmas tree, some whiskey and some whisky. Does anyone else still have a "hospitality tray" for their customers anymore? It may be old fashioned, but it's here to stay. @AntennaP0rn @ibelings @rfspace #SingleMalt #antenna
RFSPΔCΞ retweeted
We've just posted test results and 4-Dimensional gain plots of the @rfspace LPDA-600-X-POL antenna. It performs well from 650 MHz to 3 GHz and doubles as a Christmas tree. Shown with a bottle of scotch for accurate scaling. antennatestlab.com/antenna-e…
RFSPΔCΞ retweeted
#NASA still calling #VikramLander from DSN 24 Goldstone. Here's the EME reflection from a few moments ago.
RFSPΔCΞ retweeted
Cool @RFSPACE TSA800 antenna measurements from @FabienFerrero from @uca_research Université Côte d'Azur. Looks like it covers all of the IoT, ADSB, 23cm, WIFI, @semtech LoRaWAN and 3-6 GHz bands
RFSPΔCΞ retweeted
It is exciting to replace our old HP spectrum analyzer with an @rfspace SDR in our Q-Track lab at Geeks and Nerds.
RFSPΔCΞ retweeted
The 868/915 MHz patch antennas for the experimental 8x8 phased array have arrived. Now the fun begins! Also got the first samples of the @RFSPACE TSA-400 and TSA-800 antennas. TSA-400 SWR shown. @TTN_Amsterdam @SemtechCorp @LeoLabs_Space
RFSPΔCΞ retweeted
researchgate.net/publication… interesting paper on beacon monitoring using the @rfspace SDR-14 - a great receiver!
