W1RFI
join:2003-05-12
Burlington, CT | reply to Middieman
Re: Current Technologies track record wrt interference
Actually, such testing has been done:
»www.arrl.org/tis/info/HTML/plc/degrade.html
Ed, W1RFI@arrl.org |
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Middieman
Eschew Obfuscation
join:2001-02-05
Elkins Park, PA
| I read the PDF of the interference study specific to the Homeplug in house module. That's just as interesting, isn't it.
It seems that a ham in front of someone's house in his/her car can completely knock out a Homeplug system with only 4 watts. (No one uses only 4 watts in a car on HF.)
Then I see later in the results section (but not how the estimate was arrived at) that BPL could be knocked off the air if their living at least within a HALF MILE of a ham radio operator. It sounds like a guess to me, based upon most hams using at least 100 watts on the low bands.
I think that the half mile radius can at least double to a mile when the power is cranked up to just 400 watts or so--a very realistic operating power for hams.
That should be disturbing to the people who make the Homeplug system.
-=[Middie]=-
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All your base are belong to DSL Reports! |
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W1RFI
join:2003-05-12
Burlington, CT
| I can add that in Cincinatti, I did a quick test with 75 watts under the same circumstances and saw no effect on the BPL system. Clearly, something was different, but we don't know what from that fast test.
I have offered repeatedly to Current and other BPL manufacturers to help with some better controlled testing, but so far, no takes. Some utilities seem more interested, but the only additional testing done was the work done in Cottonwood, AZ.
Ed |
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