that sounds like a nice idea, but is much harder than it sounds. first, the
software would have to know how to sort out the noise from the desired signals.
it would also have to be able to scan wide bandwidths, maybe even outside the
range of most hf receivers, just using 3khz wide audio is impossible in many
cases... the grow light i found had a fundamental around 100khz with differing
amplitude even and odd harmonics to above 4mhz where they started to overlap
making an almost continuous noise, video systems could have fundamentals as low
as 15khz, and harmonics can cover very wide bandwidths, doing a thorough
analysis may require covering a large portion of the spectrum while ignoring
many different legal signals. plus since switching supplies are becoming
plugin components there may be many devices using identical supplies and thus
creating identical signatures.
Jun 4, 2013 01:32:21 PM, w4byg@att.net wrote:
Interesting article.
As a result a thought: Wouldn't it be great if someone could develop
software that when the output from your HF receiver is connected to your
sound card, it could help identify the kind or type of noises received?
It seems this would help decrease the time it would take to track down
the source(s).
Ray, W4BYG
On 6/4/2013 7:50 AM, Steve Sacco NN4X wrote:
> Fascinating RFI story from Australia.
>
> http://www.itnews.com.au/News/345494,rogue-beer-fridge-caught-by-telstra-robot.aspx
>
>
>
>
> 73,
> Steve
> NN4X
> _______________________________________________
> RFI mailing list
> RFI@contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
>
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