[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)
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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