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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。
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RFSPΔCΞ retweeted
Riding the FM station! Will have to add some avionics.
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/Spectr…
📡New DIP915 for 902-928 MHz, ground insensitive antenna. Regardless of size of groundplane or how the radio is held, resonance stays in band. High efficiency for Meshtastic and other IoT applications. rfspace.com/RFSPACE/Antenn…
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/CloudS…
@MehdiHacks Customers have bought them on Amazon sites from EU and also @wimo_de
The new LPDA-IOT Log Periodic Antenna is now available on Amazon. Covers 600-2800+ MHz with a high quality SMA connector. amazon.com/dp/B0F69GGSKG
The @RFSPACE LPDA-IoT is now in stock at Amazon. Antenna covers 600 MHz to 2.8 GHz. Limited availability. amazon.com/s?srs=38812065…
The @RFSPACE 4.0 - 26.5 GHz Vivaldi is now in stock at Amazon. amazon.com/s?srs=38812065…
Yet another Log Periodic antenna for IoT applications.
@K1DLM see if this works for you: dropbox.com/scl/fi/ai8rvla…
RFSPΔCΞ retweeted
@arturo182 Advertise your account with one PCB.
Pieter Ibelings @ibelings
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