[RFI] IR Illuminator for Security Cameras

[Michael Tope]

Thank 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 at 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-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>
>
>     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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>
>
> -- 
> *Dave - WØLEV*
> /*Just Let Darwin Work*/
>