Has the ARRL ever considered putting together a database of "ARRL certified"
devices?This would be very useful when heading to the big-box store to buy
lighting or the appliance store to buy a new appliance or furnace. 73,Gary K9GS
-------- Original message --------From: "Hare, Ed, W1RFI" <w1rfi@arrl.org>
Date: 1/31/22 9:09 AM (GMT-05:00) To: Michael Tope <W4EF@dellroy.com>, David
Eckhardt <davearea51a@gmail.com> Cc: RFI <rfi@contesting.com> Subject: Re:
[RFI] IR Illuminator for Security Cameras We have measured a number of LED
bulbs here in the ARRL Lab. They range from essentially zero noise to way over
the FCC limits. The good news is that all of the ones we have tested *so far*
that are being sold in the big box stores do meet the FCC emissions limits. The
outliers are being sold elsewhere, including eBay. One just sent to us for
testing is 26 dB over the emissions limits. It is causing bad interference.
With an actual interference case and measurements well above the FCC limits,
ARRL is going to file a formal complaint on this one. Of note, meeting the FCC
limits is not a guarantee at all of no interference. The limits below 30 MHz
are for noise conducted onto the AC mains only. There are no limits for
radiated emissions below 30 MHz or limits on the amount of noise that can be
put on the secondary of devices such as some kitchen lights that have a power
supply and run wires to the actual LED bulbs. Generally, the rules do prevent a
lot of interference, and if there is interference from a neighbor's device, it
is going to be close to you and easier to find. To be marketed, several
criteria apply.* For LED bulbs and systems to be marketed to consumers, the
design must be tested by the manufacturer to meet the FCC Part 15 Class B
limits. For fluourescent bulbs, they must meet Part 18 consumer limits. Class
A or non-consumer devices to do exist, bt they are supposed to be marketed only
for use in commercial environments. Lowe's and Home Depot sell "commercial"
units openly, so be wary.* They must be marketed with the FCC logo and the
language described earlier on a label on the product or, if the product is
small, in the documentation.* These are the responsibility of the manufacturer
and marketer. The end user of the product is responsible under FCC rules for
using it in a way that does not cause harmful interference to licensed radio.
The latter point is really hard to communicate to neighbors, so be prepared to
explain why a device they just bought at Home Depot is in violation of some
federal law that they don't understand.Ed Hare, W1RFIARRL Lab-----Original
Message-----From: RFI <rfi-bounces+w1rfi=arrl.org@contesting.com> On Behalf Of
Michael TopeSent: Sunday, January 30, 2022 2:53 PMTo: David Eckhardt
<davearea51a@gmail.com>Cc: RFI <rfi@contesting.com>Subject: Re: [RFI] IR
Illuminator for Security CamerasThank you, Dave. Yeah, I understand that this
warning is somewhat perfunctory, but it was so prominently displayed in the
manual and a friend was just complaining about RFI from LED lights. Those two
things got me to wondering if these things (IR LED arrays) are a know problem
child, or just one of the many things that can be a problem, but not always are
a problem. This one takes +12V input, so I suppose the risk is low that the
array itself is going to be an interference source. I assume the RFI problem
with LED lights is actually the switchers that supply them rather the the
semiconductors themselves and I can always use a cleaner external supply if the
one that comes with this unit is junk.73, Mike W4EF.........................On
1/30/2022 11:03 AM, David Eckhardt wrote:> There is a standard FCC paragraph
required for all Part 15, Class B > (Home and Small Office) products. It's
required by FCC. No big thing.>> Here is the required statement:>> This
equipment has been tested and found to comply with the limits for > a Class B
digital device, pursuant to part 15 of the FCC Rules. These > limits are
designed to provide reasonable protection against harmful > interference in a
residential installation. This equipment generates, > uses and can radiate
radio frequency energy and, if not installed and > used in accordance with the
instructions, may cause harmful > interference to radio communications.
However, there is no guarantee > that interference will not occur in a
particular installation. If this > equipment does cause harmful interference to
radio or television > reception, which can be determined by turning the
equipment off and > on, the user is encouraged to try to correct the
interference by one > or more of the following measures:>> * Reorient or
relocate the receiving antenna.> * Increase the separation between the
equipment and receiver.> * Connect the equipment into an outlet on a circuit
different from> that to which the receiver is connected.> * Consult the
dealer or an experienced radio/TV technician for help.>>> Dave - WØLEV>> On
Sun, Jan 30, 2022 at 6:56 PM Michael Tope <W4EF@dellroy.com> wrote:>> I
have a couple of south facing security cameras that I have tucked> under
the soffits of my high desert cabin so they don't get baked> by the>
high desert sun. The tradeoff for this is that I am getting glare off> the
soffit from the camera's built-in IR LED arrays which spoils the> night
vision image quality. I am thinking of purchasing some> external IR>
LED arrays to solve this problem.>> I found a positive review of this
illuminator, but I got a little> worried when I saw the FCC part 15 warning
prominently displayed> in the> user manual:>>
https://www.amazon.com/CMVision-IRP12-850nm-WideAngle-Power-Illuminator/dp/B00Q156IPE/ref=as_li_ss_tl?ie=UTF8&qid=1503002750&sr=8-1&keywords=irp12-850&linkCode=sl1&tag=stf03-20&linkId=1ea87920d2d4d067e723c3100182acbe>
> <https://www.amazon.com/CMVision-IRP12-850nm-WideAngle-Power-Illuminat>
or/dp/B00Q156IPE/ref=as_li_ss_tl?ie=UTF8&qid=1503002750&sr=8-1&keyword>
s=irp12-850&linkCode=sl1&tag=stf03-20&linkId=1ea87920d2d4d067e723c3100>
182acbe>>> I am not aware of any interference from the IR LED arrays that
are> built> into the cameras, but just in case these illuminators are
more> problematic I thought I would run this by the reflector before I>
press> the "add to cart" button.>> Thanks,>> Mike
W4EF.................>> _______________________________________________>
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http://lists.contesting.com/mailman/listinfo/rfi>>>> --> *Dave - WØLEV*> /*Just
Let Darwin Work*/>_______________________________________________RFI mailing
listRFI@contesting.comhttp://lists.contesting.com/mailman/listinfo/rfi_______________________________________________RFI
mailing listRFI@contesting.comhttp://lists.contesting.com/mailman/listinfo/rfi
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