Oh, that is scientific enough, Dave, telling me that the noise is below the
measurement noise floor of an active loop and spectrum analyzer. Good job!
From: David Cole [email@example.com]
Sent: Monday, July 27, 2015 5:54 PM
To: Hare, Ed W1RFI
Cc: firstname.lastname@example.org; email@example.com
Subject: Re: [RFI] LED lighting
These lights are obviously LED, several very bright point sources, three
rows of three point sources per light. Looking up at them while off no
bulb visible, and the LEDs can be seen. There were four different
types, all were obviously LED in some way.
Again, all were dead quiet in a quick scan of 80-10 meters.
No scientific method used, just listened on 80 through 10, and hearing
nothing in AM mode directly below the lights.
Thanks and 73's,
For equipment, and software setups and reviews see:
For MixW support see;
For Dopplergram information see:
For MM-SSTV see:
On Mon, 2015-07-27 at 21:33 +0000, Hare, Ed W1RFI wrote:
> Do these look like LED lights from the ground? I can be on the lookout for
> them here, too. If we ever start seeing noisy LED streetlights, we are in
> BIG trouble.
> Ed, W1RFI
> -----Original Message-----
> From: RFI [mailto:firstname.lastname@example.org] On Behalf Of David Cole
> Sent: Monday, July 27, 2015 3:51 PM
> To: email@example.com
> Cc: firstname.lastname@example.org
> Subject: Re: [RFI] LED lighting
> As I said, (and told the City folks), not scientific, had we had more time I
> would have been able to do a proper test, but the lights are already up and
> running... I will do a few more drive by events as time allows, and bring
> higher and higher frequency gear.
> We came into this late. This was just a sweep to be sure something was not
> horribly wrong, not a definitive test, and it was presented as such to the
> Thanks and 73's,
> For equipment, and software setups and reviews see:
> For MixW support see;
> For Dopplergram information see:
> For MM-SSTV see:
> On Mon, 2015-07-27 at 13:06 -0400, email@example.com wrote:
> > David,
> > What about VHF, UHF, SHF?
> > No potential for weak signal GPS or WiFi interference?
> > David
> > > I discovered that the City here is going to be switching to LED
> > > streetlights soon, and ended up in contact with the City Engineer...
> > >
> > > The long and short of it is that the city had not even thought about
> > > Part 15/18 compliance, but when they looked, the lights were
> > > compliant as per the data sheet on them.
> > >
> > > He and agreed to have us look over the test run they have in place
> > > looking for RFI... He gave us the addresses and we we did-- all of
> > > them were dead quiet on 80-10 Meters, regarding broadband noise, in
> > > a drive around test...
> > >
> > > We did a prelight drive around, mapping all the poles by number and
> > > taking RF background readings, on 80-10, then waited for them to
> > > light, and did it again... Not one light made any detectable RFI,
> > > at street level. Not scientific, and I told him that, but at least
> > > the city is being really good about RFI, and it is now on their radar.
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