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Re: Camera on Power-Line Adapters



Ok, so I have read through the papers and only dozed off
once..........twice. (maybe)

I have a few more challenges now.

To do this properly I would need to know the following.

What are the frequencies of the RFI/EMI causing the problem??

What are the best composition of Ferrite that will reduce the RFI/EMI
to levels that will be the most effective, #73, #43, #61, or other??

Based upon the #12 wire what is the best calculation of "air gap"
and length of the Ferrite Core to be used??

What are the best properties that will give the greatest benefit based
upon the ambient temperature??

Even after reading the pages of stuff, I can't even come close to
guessing answers to the above, so then, it boils down to a roll of the
Ferrite dice to hopefully get lucky.

That it seems what has happened here.  Presently with the 9 snap-ons of
various sizes per hot and neutral #12 wires are working to allow the 3mp
camera video to transmit over the AC wiring approximately 220 feet to
the NVR for recording.

Do I have the correctly calculated Ferrite Cores for
properties and size?? Probably not.

Are they doing something that helps?? Yes

However, it is not 100% because, I checked the history log from over
night and the camera dropped out about 8 times with no video.  It did
restore, which from what I can see after about 1 to 3 minutes.

At this point I can't be to disappointed. That is, at worst .016%
failure rate.  Although I don't know if the drop in video signal was as
a result of RFI/EMI or something else, like maybe a gang related
electron with a hissy fit.  :-)

I was told a long time ago that getting with in 3% of perfection is
easy.  It's that last 3% that will be hardest and most time consuming.

All in all I am happy to within .016%

Thanks again to all for the assist and insight on this.

Thumbs UP!!!

Les





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