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Author Topic: Wide-band interference source  (Read 1061 times)

Weaver

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Wide-band interference source
« on: May 25, 2018, 05:46:51 AM »

Can some devices generate a load of interference over a very wide range ? For example enough to stuff up > 2 MHz worth of spectrum ? Or 20 MHz worth?
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roseway

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Re: Wide-band interference source
« Reply #1 on: May 25, 2018, 07:07:53 AM »

Anything which sparks, e.g. unsuppressed vehicle ignition systems.
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  Eric

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Re: Wide-band interference source
« Reply #2 on: May 25, 2018, 07:14:35 AM »

Any idea how wide?
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roseway

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Re: Wide-band interference source
« Reply #3 on: May 25, 2018, 07:31:51 AM »

I'm not sure there's a general answer to that, but I'm no expert.
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  Eric

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Re: Wide-band interference source
« Reply #4 on: May 25, 2018, 07:53:14 AM »

In your experience, many bins wide, ie n × 4.3125 kHz perhaps where n is something substantial ?
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roseway

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Re: Wide-band interference source
« Reply #5 on: May 25, 2018, 08:05:29 AM »

Sparking produces wide band interference which can potentially range from a few hertz to a few gigahertz. But I repeat, I'm no expert.
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  Eric

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Re: Wide-band interference source
« Reply #6 on: May 25, 2018, 08:20:59 AM »

A square wave or step function has a Fourier transform with components going on up for ever of course, as 1/f iirc. So it will extend some way up.
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anything