Why is there a central spike in frequency plots from many software defined radios?
Admin
From Ted Cline 9/9/2025: The spike at frequency zero is just a consequence of the fact that your signal does not have an average of zero. The value at “frequency…
Software
Normalising data produced by Easy Radio Astronomy Software Suite (ezRA) from multiple telescope systems to allow them to be combined to generate combined plots and maps.
This is very much a work in progress, so there isn’t a definitive answer from this post……. Andy Hi Ted, I asked ChatGPT to have a go at this and…
Normalising data files from multiple systems in ezRA
Ted Cline – N0RQV:secret ezCon command option …………. -ezConAntXTVTLevelL 1.3 -3.2 (multiply all AntXTVT sample values and add) Use per file (or batch files) to normnalise
Marcus’s reply about Soapysdr and Sdrplay. Seems the gain settings are backwards in software.
https://groups.google.com/g/sara-list/c/o7xGe2hYkHc/m/VnaAH2u9AgAJ
Full Instructions for creating 4D images in ezRA & Rinearn3D 12/12/24@02:00
https://www.astronomy.me.uk/wp-content/uploads/2025/08/Full-Instructions-for-creating-4D-images-in-ezRA-Rinearn3D-121224@0200.pdf
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How to fix Stellarium Planetarium Application freezing when launched under Linux Ubuntu
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