Function and use of “Subtract” block in GNU Radio
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Good question — the Subtract block in GNU Radio Companion works on streamed numeric sample data, and the type of data it processes depends on what version of the block…
You can have two (or more) instances of the GNU Radio Companion QT GUI Vector Sink block in the same flowgraph
Yes — you can have two (or more) instances of the GNU Radio Companion QT GUI Vector Sink block in the same flowgraph, but there are a few practical considerations…
GNU Radio does have blocks that can subtract streamed data in real time
GNU Radio does have blocks that can subtract streamed data in real time, though there isn’t a single block literally called “Subtraction”. You can achieve subtraction cleanly in a few…
GNU Radio, the “Stream to Vector” block
In GNU Radio, the “Stream to Vector” block works with streamed sample data and groups it into fixed-length vectors. Here’s a clear breakdown of how it works: 📡 Input Type…
How much uranium is it legal to own without licence in UK?
How much uranium is it legal to own without licence in UK? Short answer: there isn’t a simple mass limit — UK law controls radioactive activity (becquerels), not kilograms. Small…
What is return loss?
https://www.astronomy.me.uk/wp-content/uploads/2025/10/What-is-return-loss-261025-scaled.jpg
Mini-Circuits SLP-21.4+ Coaxial Low Pass Filter 50Ohm DC-22MHz Data Sheet
Download data sheet below: https://www.astronomy.me.uk/wp-content/uploads/2025/10/Mini-Circuits-SLP-21.4-Coaxial-Low-Pass-Filter-50Ohm-DC-22MHz-Data-Sheet-261025.pdf
Was the Orionid meteor shower a flop this year?
The Orionid meteor shower is described by the Royal Museums Greenwich, London, website as: Orionids 22 October 2 Oct-7 Nov 15 Fast with fine trains. Associated with Comet Halley (https://www.rmg.co.uk/stories/space-astronomy/meteor-shower-guide-2025…
New revised SDRplay version 23/10/2025 of Ted’s original ezRA GNU Radio Data Collection Script from 20/10/2025
https://www.astronomy.me.uk/wp-content/uploads/2025/10/Ted-Clines-original-GNU-Radio-ezRA-GRC-script-201025ezColGR251018eArevised-AT-231025.zip https://www.astronomy.me.uk/wp-content/uploads/2025/10/Ted-Cline-GNU-Radio-SDRplay-AT-revisions-231025.zip
Data files from LRO-H2 created using draft SDRplay GNU Radio Software and SDRplay RSPduo SDR 21-23/10/2025
Unfortunately, these do not seem to be able to be processed in ezRA. GRC file used for data collection below (GNU Radio Companion File): https://www.astronomy.me.uk/wp-content/uploads/2025/10/ezColGR251018eA-AT201025@2240.zip Data Files created by above…