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SADARS
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24 Feb 2022 - RSGB Convention Video by Andrew Barron ZL3DW
Posted: 25 Feb 2022 07:45 AM PST
https://sadars.co.uk/wp/archives/3047
A Part of the video programme at the 2021 radio conference, this video
tells a basic story about the SDR and DSP.
Andrew started by asking: SDR, What exactly is it?, how did it evolve, what
are Hybrid SDRs, the Direct sampling limits, and more. He went on to say
SDRs are part of the Digital Revolution. We might want to hang on to old LP records, but the world has gone digital. Take for instance, your phone,
camera, TV or even amateur radio transceivers. The point is that digital signal stages dont add noise! SDRs are a logical extension of Digital
Signal Processing, or DSP aimed at converting received signals to digital
as close as possible to the antenna.
Andrew went on to explain the DSP evolution and how changes were made over
time to improve the result.
He explained that many amateur radio DSP radios are not actually all
digital since the incoming signal is too high in frequency to go directly
to digital due to direct sampling limits.
Amateurs who are interested in learning a bit more are recommended to watch
the video, found at:
https://www.youtube.com/watch?v=jv6DCGa6zy8
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