[RFI] FCC Complaint Filing
Dave Cole
dave at nk7z.net
Fri Nov 22 18:35:09 EST 2019
Odd you should mention that Kurt, I am making a movie right now of my
RFI environment for the page I mentioned in my last post... I'll add it
to the page tomorrow...
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources
On 11/22/19 3:10 PM, KD7JYK DM09 wrote:
> "I hate to spend the money but think I may need a Spectrum Analyzer.
> This is an RFI mess up here, these lights would be one of twenty
> interference issues. I have two other sources of broadband noise
> needing to be found, all the others are harmonics scattered up and down
> the band(s). The analyzer would be a help in sorting this all out as
> well as giving me some relevant and credible data"
>
> It may not be that bad. Check into some of the Software Defined Radio
> dongles, which are inexpensive, and free software.
>
> Look into RTL-SDR on ebay, amazon, and general info on the web. A
> relatively fancy unit is about $30 (fancier, better, et cetera go up to
> $$$$), and may be all that is needed to show noise vs. no noise, and the
> get a screen capture of the interference as heard, and within proximity
> of a source with a small antenna. It can also help locate a source when
> turned on, clear-ish screen vs. visual nightmare when something like the
> LEDs you mention get powered up.
>
> For added affect, imagine a video recording device, pointing at a
> computer, or tablet, with an SDR, and software running showing a
> waterfall display, and the LEDs in the background, off, then at 1700h,
> when they come on, the cluster of noise scrolling down the screen. That
> would be pretty damning!
>
> Some twenty plus years ago, we did it with a portable radio, Argo,
> Spectran, Spectrogram, , and similar, and either get the image in real
> time using a junk laptop, or record it for later analysis.
>
> It doesn't have to be fancy, special, or expensive, just provide a
> visual interpretation.
>
> Kurt
>
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