Bill-
It is refreshing to see a voice of sanity here instead of the same old
platitudes. What happened to ham radio being on the cutting edge of
technology? Many of us seem in love with 100 year old technology--which is ok
for them but is not likely to attract many new hams from the ranks of
computer literate young people who are not lazy but by and large see hams and
their clinging to morse code as crushingly boring.
Andy K5VM
Bill Turner, W7TI wrote:
> Yes, it CAN work magic. It's done with signal averaging. The DSP
> will record a short piece of signal, say a few hundred milliseconds,
> and analyze it looking for a pattern buried in the noise. The pattern
> of course, is the tone from the signal you're trying to receive. In
> effect it "subtracts" the totally random stuff from the non-random
> stuff and what's left is the signal. If you ever get a chance, watch
> a modern digital storage oscilloscope in action. Put in a sine wave
> which is totally buried in noise. In the "normal" mode, nothing is
> visible to the eye except what appears to be white noise. Turn on the
> "averaging" mode and like magic, the noise fades away and the sine
> wave appears. The first time you see this happen it will give you
> goose bumps. At least it did me.
>
> This same technology can be applied to radio. NASA has used it for
> years to dig spacecraft signals out of the noise. It works; now we
> need it applied to amateur radio. It's coming.
>
> 73, Bill W7TI
>
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